A sewage heavy metal detection sampling device

Abstract

The present invention provides a sewage heavy metal detection sampling device, comprising a cylinder, a floating plate and a counterweight, a sliding sleeve is welded to the outer side of the floating plate, a sliding block is clamped on the inner side of the sliding sleeve, an air hole is opened at the center of the sliding block, an inlet and a partition are welded to the outer side of the cylinder, the partition is arranged at the top of the inlet, an air pipe is welded to the top of the partition, a partition is welded to the inner side of the cylinder, an inner cylinder is clamped at the center of the cylinder, and a piston is arranged at the bottom of the partition. The sewage heavy metal detection sampling device can simplify the sampling method, and can complete three different depths of sampling work at the same time, improve the sampling efficiency, ensure that the sewage entering the cylinder is sewage of the same depth, ensure the accuracy of sampling, improve the reliability of sampling, and can automatically clean the inner cavity in the cylinder without the need to use cleaning equipment, thereby reducing manpower consumption and improving cleaning efficiency. The device is suitable for sewage sampling in sewage treatment.

Description

Technical Field

[0001] The invention relates to the technical field of sampling equipment for sewage treatment, in particular to a sewage heavy metal detection sampling device. Background Art

[0002] In order to ensure that sewage can be effectively purified, it is necessary to carry out corresponding treatment methods according to the polluting components of the sewage, and use the required type and quantity of purification agents in combination, and then it is necessary to quantitatively analyze the components of the sewage, and it is necessary to use a sewage treatment sampling device to sample the sewage. The invention patent with patent application number CN202011262438.9 discloses a municipal sewage treatment sampling device. The existing sewage treatment sampling equipment basically has the advantages of fast sampling speed, simple operation, light weight, easy to carry and transport, good working stability, long service life, etc., which can meet the use needs of sampling the sewage that needs to be purified. However, for As for the existing sewage treatment sampling equipment, on the one hand, it is not conducive to the positioning sampling operation of sewage. Due to the different pollutants, the pollutant content at different depths of sewage will be different. Personnel are required to measure the depth of the sampling position in real time during sampling, which reduces the sampling rate and is not conducive to rapid sampling operations. On the other hand, when sampling, sewage is poured into the sampling container, which causes the buoyancy of the sampler to change rapidly, which is not conducive to ensuring the accuracy of the sampling position and the accuracy of the sampling. On the other hand, when cleaning it, it is necessary to clean the sampling container one by one, which increases manpower consumption and is not conducive to rapid cleaning operations. Summary of the invention

[0003] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a sewage heavy metal detection sampling device to solve the problems raised in the above-mentioned background technology. The present invention has a novel structure and diverse functions and is suitable for sewage sampling in sewage treatment.

[0004] In order to achieve the above-mentioned purpose, the present invention is implemented through the following technical scheme: a sewage heavy metal detection sampling device, including a cylinder, a floating plate and a counterweight, the floating plate is welded to the top of the cylinder, the counterweight is welded to the bottom of the cylinder, a sliding sleeve is welded to the outer side of the floating plate, a sliding block is clamped on the inner side of the sliding sleeve, an air hole is opened at the center of the sliding block, a one-way valve is installed on the inner side of the air hole, an inlet and a partition are welded to the outer side of the cylinder, the partition is arranged at the top of the inlet, an air pipe is welded to the top of the partition, a partition is welded to the inner side of the cylinder, an inner cylinder is clamped at the center of the cylinder, a piston is arranged at the bottom of the partition, and the A tension spring is welded to the bottom of the piston, a filter is welded on the outer wall of the cylinder, a pressure valve is clamped on the inner side of the inlet, a clamping column is clamped on one side of the pressure valve, a knob is provided on one side of the clamping column, a connecting valve is clamped on the inner side of the partition cylinder, a pressure spring is welded on the top of the connecting valve, a guide rod is welded on the bottom of the pressure valve, a float valve is installed at the bottom of the partition, an inlet pipe is welded on the top of the float plate, fan blades are provided on the inner side of the inlet pipe, a through opening is opened on the inner cylinder, a spacer is clamped on the inner side of the through opening, a support plate is welded on the bottom of the spacer, a spring is welded on the bottom of the support plate, a connecting rod is welded on the top of the spacer, and a discharge pipe is welded on the bottom of the inlet.

[0005] As a preferred embodiment of the present invention, a screw hole is provided on one side of the inlet, an external thread is provided on the outer side of one side of the knob, an internal thread is provided on the inner side of the screw hole, and the external thread matches the internal thread.

[0006] As a preferred embodiment of the present invention, a bayonet is provided on one side of the pressure valve, one end of the clamping column is a smooth surface, and one end of the clamping column is clamped on the inner side of the bayonet through the smooth surface.

[0007] As a preferred embodiment of the present invention, a scale is provided on one side of the knob, the knob is connected to the clamping column through spring 2, the top end of the guide rod is welded to the bottom of the connecting valve, and the bottom end of the guide rod passes through the partition tube and the inlet in sequence and is welded to the top of the pressure valve.

[0008] As a preferred embodiment of the present invention, an air hole is opened on the outer wall of the cylinder, one side of the partition is connected to the float valve through the air hole, the top of the connecting valve is connected to the top of the partition through a compression spring, an inner plate is welded in the middle of the partition, and the connecting valve is clamped on the inner side of the inner plate.

[0009] As a preferred embodiment of the present invention, the number of the sliding sleeve and the partition are both 3, the cylinder is equally divided into three cavities by the partition, and the three cavities are connected to the sliding sleeve in sequence through the float valve, the air hole partition and the air pipe.

[0010] As a preferred embodiment of the present invention, the outer diameter of the piston is equal to the inner diameter of the cylinder, the inlet is connected to the cavity through a side port, a stopper is welded at the bottom of the side port, the piston is connected to the bottom of the cylinder and the top of the partition respectively through a tension spring, and the filter is arranged at the bottom of the piston.

[0011] As a preferred embodiment of the present invention, the top end of the inner cylinder passes through the center of the bearing mounting floating plate, the bottom end of the inner cylinder passes through three partitions in sequence and extends to the bottom of the cylinder body, and the outer side of the inner cylinder is welded with a stirring rod.

[0012] As a preferred embodiment of the present invention, valves are installed on the inner sides of the inlet pipe and the outlet pipe, the outer side of the fan blade is stuck on the inner side of the inlet pipe, and the bottom end of the fan blade is welded to the top end of the inner tube through a bracket.

[0013] As a preferred embodiment of the present invention, the outer diameter of the spacer is equal to the inner diameter of the inner tube, the number of the spacers and the through openings are both 3, the three spacers are connected by a connecting rod, the inner tube is connected to the three inner cavities through the through openings, the support plate is welded to the spacer at the bottom, and the support plate is connected to the bottom of the inner tube through a spring.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. When the sewage heavy metal detection sampling device is in use, when it is necessary to perform sampling operations at a specified depth, the knob is rotated so that the scale value on the knob corresponding to the scale value on the outer side of the inlet is equal to the water depth value of the required sewage. The knob squeezes the clamping column through the second spring. The density of the overall equipment is slightly greater than the density of the sewage. The cylinder slowly sinks in the sewage driven by the counterweight. As the cylinder sinks, the pressure valve is continuously increased by the water pressure value, and the pressure valve generates a rightward thrust on the clamping column. When the inlet moves to the specified depth, the water pressure squeezes the pressure valve, so that the pressure valve pushes the clamping column to the right, and the clamping column squeezes the second spring, so that the pressure valve is opened, and the sewage enters the cylinder through the inlet. There is no need for personnel to measure the depth of the sampling equipment while sampling, which simplifies the sampling method. As the sampling equipment continues to sink, the pressure valve at the corresponding depth is opened after reaching the specified depth, so that sampling work at three different depths can be completed at the same time, thereby improving the sampling efficiency.

[0016] 2. When the sewage heavy metal detection sampling device is in use, during the sampling operation, as the cylinder sinks, the sewage passes through the filter screen and enters the bottom of the piston, and the water pressure of the sewage is used to squeeze the piston upward, so that the tension spring is stretched and the air in the cavity is compressed. When the pressure valve is opened by the water pressure to perform sampling, the pressure valve opens the connecting valve through the guide rod, so that the gas in the cavity passes through the float valve into the cylinder, and then enters the sliding sleeve through the air pipe. As the gas enters the sliding sleeve, the slider is pushed outward. Since the water pressure at the top is less than the water pressure at the bottom, the air in the cavity quickly enters the sliding sleeve under the pressure of the sewage entering the cylinder through the inlet and the sewage squeezing the piston upward through the bottom of the piston, thereby making the expanded volume in the sliding sleeve larger than the volume of the sewage entering the cylinder, thereby increasing the overall volume of the equipment, so that the equipment as a whole can be suspended in the water for a short time, thereby effectively ensuring that the sewage entering the cylinder is sewage of the same depth, effectively ensuring the accuracy of sampling, avoiding the sampling depth being different due to the up and down movement of the equipment during sampling, and improving the reliability of sampling.

[0017] 3. When the sewage heavy metal detection sampling device is in use, after sampling is completed, the valve on the discharge pipe is opened to release the sewage for detection, and the external cleaning water pipeline is put into the inlet pipe. The cleaning water flows into the inner cylinder through the inlet pipe, and the cleaning water pushes the fan blades, so that the fan blades drive the inner cylinder to rotate in the cylinder through the bearing. At the same time, the water pressure of the cleaning water is used to push the support plate downward, so that the spring is compressed, and the three spacers move downward at the same time under the drive of the connecting rod, so that the spacers move to the bottom of the through opening, and the cleaning water flows from the inner cylinder through the through opening into the cylinder. At the same time, the inner cylinder drives the stirring rotation to clean the cylinder and the inlet. The cleaning water after cleaning is discharged to the outside through the discharge pipe, and can automatically clean the three sampling cavities in the cylinder, without the need to use cleaning equipment, and reduces manpower consumption and improves cleaning efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the structure of a sewage heavy metal detection sampling device of the present invention;

[0019] Figure 2 A cross-sectional view of a sewage heavy metal detection sampling device according to the present invention;

[0020] Figure 3 A cross-sectional view of the bottom of a cylinder of a sewage heavy metal detection sampling device according to the present invention;

[0021] Figure 4 A cross-sectional view of a diaphragm of a sewage heavy metal detection sampling device according to the present invention;

[0022] Figure 5 A cross-sectional view of an inlet pipe of a sewage heavy metal detection sampling device according to the present invention;

[0023] Figure 6 It is a cross-sectional view of an inner cylinder of a sewage heavy metal detection sampling device of the present invention;

[0024] In the figure: 1. Cylinder; 2. Floating plate; 3. Counterweight; 4. Sleeve; 5. Slider; 6. Air hole; 7. Inlet; 8. Spacer; 9. Air pipe; 10. Spacer; 11. Inner cylinder; 12. Piston; 13. Tension spring; 14. Filter; 15. Pressure valve; 16. Knob; 17. Clamping column; 18. Connecting valve; 19. Compression spring; 20. Guide rod; 21. Floating valve; 22. Inlet pipe; 23. Fan blade; 24. Through port; 25. Spacer; 26. Spring; 27. Drain pipe; 28. Connecting rod; 29. ​​Support plate; 30. Stirring. DETAILED DESCRIPTION

[0025] 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.

[0026] Example 1

[0027] A sewage heavy metal detection sampling device comprises a cylinder 1, a floating plate 2 and a counterweight 3, wherein the floating plate 2 is welded to the top of the cylinder 1, and the counterweight 3 is welded to the bottom of the cylinder 1. A sliding sleeve 4 is welded to the outer side of the floating plate 2, and a slider 5 is clamped on the inner side of the sliding sleeve 4. An air hole 6 is opened at the center of the slider 5, and a one-way valve is installed on the inner side of the air hole 6. An inlet 7 and a partition 8 are welded to the outer side of the cylinder 1, and the partition 8 is arranged at the top of the inlet 7. An air pipe 9 is welded to the top of the partition 8. A partition 10 is welded to the inner side of the cylinder 1, and an inner cylinder 11 is clamped at the center of the cylinder 1. A piston 12 is arranged at the bottom of the partition 10, and a tension spring 13 is welded to the bottom of the piston 12. A filter screen 14 is welded on the outer wall of the cylinder 1, and a pressure valve 15 is clamped on the inner side of the inlet 7. A clamping column 17 is clamped on one side of the pressure valve 15, and a knob is arranged on one side of the clamping column 17. 16. A connecting valve 18 is clamped on the inner side of the partition tube 8, a compression spring 19 is welded on the top of the connecting valve 18, a guide rod 20 is welded on the bottom of the compression valve 18, a float valve 21 is installed on the bottom of the partition plate 10, an inlet pipe 22 is welded on the top of the floating plate 2, and a fan blade 23 is arranged on the inner side of the inlet pipe 22. A through opening 24 is opened on the inner tube 11, a spacer 25 is clamped on the inner side of the through opening 24, a support plate 29 is welded on the bottom of the spacer 25, a spring 26 is welded on the bottom of the support plate 29, a connecting rod 28 is welded on the top of the spacer 25, and a drain pipe 27 is welded on the bottom of the inlet 7. When sampling, the floating plate 2 is connected to the rope. When sampling, it is only necessary to throw the sampling equipment into the sampling area. When the automatic sampling is completed, the sampling equipment can be pulled out through the rope. People do not need to approach the sewage area, which effectively prevents people from falling into the sewage pool or river channel and ensures their safety.

[0028] Example 2

[0029] A screw hole is provided on one side of the inlet 7, an external thread is provided on the outer side of one side of the knob 16, an internal thread is provided on the inner side of the screw hole, the external thread matches the internal thread, a bayonet is provided on one side of the pressure valve 15, one end of the clamping column 17 is a smooth surface, one end of the clamping column 17 is clamped on the inner side of the bayonet through the smooth surface, a scale is provided on one side of the knob 16, the knob 16 is connected to the clamping column 17 through a spring 2, the top end of the guide rod 20 is welded to the bottom of the connecting valve 18, the bottom end of the guide rod 20 passes through the partition 8 and the inlet 7 in turn and is welded to the top of the pressure valve 15, when a sampling operation of a specified depth is required, the knob 16 is rotated so that the scale value on the knob 16 corresponding to the scale value on the outer side of the inlet 7 is equal to the required sewage water depth value, and the knob 16 is rotated by the spring Spring 2 squeezes the clamping column 17. After the equipment is placed in the sewage, the density of the entire equipment is slightly greater than the density of the sewage. The cylinder 1 slowly sinks in the sewage driven by the counterweight 3. As the cylinder 1 sinks, the pressure valve 15 is continuously increased by the water pressure value, and the pressure valve 15 generates a rightward thrust on the clamping column 17. When the inlet 7 moves to the specified depth, the water pressure squeezes the pressure valve 15, so that the pressure valve 15 pushes the clamping column 17 to the right, and the clamping column 17 squeezes spring 2, so that the pressure valve 15 is opened, and the sewage enters the cylinder 1 through the inlet 7. There is no need for personnel to measure the depth of the sampling equipment while sampling, which simplifies the sampling method. As the sampling equipment continues to sink, the pressure valve 15 at the corresponding depth is opened after reaching the specified depth, so that sampling work at three different depths can be completed at the same time, thereby improving the sampling efficiency.

[0030] Example 3

[0031] An air hole is provided on the outer wall of the cylinder 1, one side of the partition 8 is connected with the float valve 21 through the air hole, the top of the connecting valve 18 is connected with the top of the partition 8 through a compression spring 19, an inner plate is welded to the middle of the partition 8, the connecting valve 18 is stuck on the inner side of the inner plate, the number of the sliding sleeve 4 and the partition 10 are both 3, the cylinder 1 is divided into three cavities by the partition 10, the three cavities are connected with the sliding sleeve 4 through the float valve 21, the air hole, the partition 8 and the air pipe in turn, the outer diameter of the piston 12 is equal to the inner diameter of the cylinder 1, the inlet 7 is connected with the cavity through the side port, a stopper is welded at the bottom of the side port, the piston 12 is connected with the bottom of the cylinder 1 and the top of the partition 10 respectively through the tension spring 13, the filter screen 14 is arranged at the bottom of the piston 12, when the sampling operation is performed, as the cylinder 1 sinks, the sewage passes through the filter screen 14 and enters the bottom of the piston 12, and the water pressure of the sewage is used to squeeze the piston 12 upward, The tension spring 13 is stretched and the air in the cavity is compressed. When the pressure valve 15 is opened by the water pressure for sampling, the pressure valve 15 opens the connecting valve 18 through the guide rod 20, so that the gas in the cavity passes through the float valve 21 into the partition tube 8 and then enters the sliding sleeve 4 through the air pipe 9. As the gas enters the sliding sleeve 4, the slider 5 is pushed outward. Since the water pressure at the top is less than the water pressure at the bottom, the air in the cavity quickly enters the sliding sleeve 4 under the pressure of the sewage entering the cylinder 1 through the inlet 7 and the sewage squeezing the piston 12 upward through the bottom of the piston 12, thereby making the expanded volume in the sliding sleeve 4 larger than the volume of the sewage entering the cylinder 1, thereby increasing the overall volume of the equipment so that the equipment can be suspended in the water for a short time, thereby effectively ensuring that the sewage entering the cylinder 1 is sewage of the same depth, effectively ensuring the accuracy of sampling, avoiding the sampling depth being different due to the up and down movement of the equipment during sampling, and improving the reliability of sampling.

[0032] Example 4

[0033] The top end of the inner cylinder 11 is installed at the center of the floating plate 2 through the bearing, and the bottom end of the inner cylinder 11 passes through the three partitions 10 in sequence and extends to the bottom of the cylinder body 1. The outer side of the inner cylinder 11 is welded with a stirrer 30, and the inner sides of the inlet pipe 22 and the discharge pipe 27 are both equipped with valves. The outer side of the fan blade 23 is stuck in the inner side of the inlet pipe 22, and the bottom end of the fan blade 23 is welded to the top end of the inner cylinder 11 through a bracket. The outer diameter of the spacer 25 is equal to the inner diameter of the inner cylinder 11. The number of the spacer 25 and the through-port 24 is 3, and the three spacers 25 are connected by a connecting rod 28. The inner cylinder 11 is connected to the three inner cavities through the through-port 24. The support plate 29 is welded on the bottom spacer 25, and the support plate 29 is connected to the bottom of the inner cylinder 11 through a spring 26. When the sampling is completed, the valve on the discharge pipe 27 is opened. , release the sewage for detection work, clean the water pipeline outside the inlet pipe 22, and the cleaning water flows into the inner tube 11 through the inlet pipe 22. The cleaning water pushes the fan blades 23, so that the fan blades 23 drive the inner tube 11 to rotate in the cylinder body 1 through the bearing, and at the same time, the water pressure of the cleaning water pushes the support plate 29 downward, so that the spring 26 is compressed, and the three spacers 25 are driven by the connecting rod 28 to move downward at the same time, so that the spacers 25 move to the bottom of the through port 24, and the cleaning water flows from the inner tube 11 through the through port 24 into the cylinder body 1. At the same time, the inner tube 11 drives the stirring 30 to rotate, and the cylinder body 1 and the inlet 7 are cleaned. The cleaning water after cleaning is discharged to the outside through the discharge pipe 27, which can automatically clean the three sampling cavities in the cylinder body 1, without the need to use cleaning equipment, and reduce manpower consumption and improve cleaning efficiency.

[0034] When the sewage heavy metal detection sampling device is in use, when it is necessary to perform sampling operations at a specified depth, the knob 16 is rotated so that the scale value on the knob 16 corresponding to the scale value on the outer side of the inlet 7 is equal to the water depth value of the required sewage. The knob 16 squeezes the clamping column 17 through the second spring. After the device is placed in the sewage, the density of the entire device is slightly greater than the density of the sewage. The cylinder 1 slowly sinks in the sewage driven by the counterweight 3. As the cylinder 1 sinks, the pressure valve 15 is continuously increased by the water pressure value, and the pressure valve 15 generates a rightward thrust on the clamping column 17. When the inlet 7 moves to the specified depth, the water pressure squeezes the pressure valve 15, causing the pressure valve 15 to push the clamping column 17 to the right. The clamping column 17 squeezes the second spring, causing the pressure valve 15 to be opened, and the sewage enters through the inlet 7. In the cylinder 1, there is no need for personnel to measure the depth of the sampling equipment while sampling, which simplifies the sampling method. As the sampling equipment continues to sink, the pressure valve 15 at the corresponding depth is opened after reaching the specified depth, so that sampling work at three different depths can be completed at the same time, improving the sampling efficiency. When the sampling operation is performed, as the cylinder 1 sinks, the sewage passes through the filter screen 14 and enters the bottom of the piston 12. The water pressure of the sewage is used to squeeze the piston 12 upward, so that the tension spring 13 is stretched and the air in the cavity is compressed. When the pressure valve 15 is opened by the water pressure for sampling, the pressure valve 15 opens the connecting valve 18 through the guide rod 20, so that the gas in the cavity passes through the float valve 21 into the partition cylinder 8, and then enters the sliding sleeve 4 through the air pipe 9. The body enters the sliding sleeve 4, and the slider 5 is pushed outward. Since the water pressure at the top is less than the water pressure at the bottom, the air in the cavity quickly enters the sliding sleeve 4 under the pressure of the sewage entering the cylinder 1 through the inlet 7 and the sewage pressing the piston 12 upward through the bottom of the piston 12, so that the expanded volume in the sliding sleeve 4 is larger than the volume of the sewage entering the cylinder 1, thereby increasing the overall volume of the equipment, so that the overall equipment can be suspended in the water for a short time, thereby effectively ensuring that the sewage entering the cylinder 1 is sewage of the same depth, effectively ensuring the accuracy of sampling, avoiding the sampling depth being different due to the up and down movement of the equipment during sampling, and improving the reliability of sampling. When the sampling is completed, the valve on the discharge pipe 27 is opened to discharge the sewage for detection. , the inlet pipe 22 is connected to the external cleaning water pipeline, and the cleaning water flows into the inner cylinder 11 through the inlet pipe 22. The cleaning water pushes the fan blades 23, so that the fan blades 23 drive the inner cylinder 11 to rotate in the cylinder body 1 through the bearing, and at the same time, the water pressure of the cleaning water pushes the support plate 29 downward, so that the spring 26 is compressed, and the three spacers 25 are driven by the connecting rod 28 to move downward at the same time, so that the spacers 25 move to the bottom of the through opening 24, and the cleaning water flows from the inner cylinder 11 through the through opening 24 into the cylinder body 1. At the same time, the inner cylinder 11 drives the stirring 30 to rotate, and the cylinder body 1 and the inlet 7 are cleaned. The cleaning water after cleaning is discharged to the outside through the discharge pipe 27, which can automatically clean the three sampling cavities in the cylinder body 1, without the need to use cleaning equipment, and reduce manpower consumption.Improve cleaning efficiency.

[0035] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the attached claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0036] 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 heavy metal detection sampling device, characterized in that: The invention comprises a cylinder (1), a floating plate (2) and a counterweight (3), wherein the floating plate (2) is welded to the top end of the cylinder (1), the counterweight (3) is welded to the bottom end of the cylinder (1), a sliding sleeve (4) is welded to the outer side of the floating plate (2), a sliding block (5) is clamped on the inner side of the sliding sleeve (4), an air hole (6) is opened at the center of the sliding block (5), a one-way valve is installed on the inner side of the air hole (6), an inlet (7) and a partition (8) are welded to the outer side of the cylinder (1), the partition (8) is arranged at the top of the inlet (7), an air pipe (9) is welded to the top of the partition (8), a partition (10) is welded to the inner side of the cylinder (1), an inner cylinder (11) is clamped at the center of the cylinder (1), and the bottom of the partition (10) is provided with a A piston (12) is arranged, a tension spring (13) is welded to the bottom of the piston (12), a filter screen (14) is welded to the outer wall of the cylinder (1), a pressure valve (15) is clamped on the inner side of the inlet (7), a clamping column (17) is clamped on one side of the pressure valve (15), a knob (16) is arranged on one side of the clamping column (17), a connecting valve (18) is clamped on the inner side of the partition cylinder (8), a pressure spring (19) is welded to the top of the connecting valve (18), a guide rod (20) is welded to the bottom of the connecting valve (18), a floating valve (21) is installed at the bottom of the partition plate (10), an inlet pipe (22) is welded to the top of the floating plate (2), a fan blade (23) is arranged on the inner side of the inlet pipe (22), and a through opening is opened on the inner cylinder (11). (24), a spacer (25) is clamped on the inner side of the through port (24), a support plate (29) is welded to the bottom of the spacer (25), a spring (26) is welded to the bottom of the support plate (29), a connecting rod (28) is welded on the top of the spacer (25), a row pipe (27) is welded to the bottom of the inlet (7), a scale is provided on one side of the knob (16), the knob (16) is connected to the clamping column (17) through spring (2), the top end of the guide rod (20) is welded to the bottom of the connecting valve (18), the bottom end of the guide rod (20) passes through the spacer tube (8) and the inlet (7) in turn and is welded to the top of the pressure valve (15), an air hole is provided on the outer wall of the cylinder (1), and one side of the spacer tube (8) is connected to the float valve (18) through the air hole. 21), the top of the connecting valve (18) is connected to the top of the partition (8) through a compression spring (19), an inner plate is welded to the middle of the partition (8), the connecting valve (18) is stuck on the inner side of the inner plate, the number of the sliding sleeve (4) and the partition (10) are both 3, the cylinder (1) is divided into three cavities by the partition (10), the three cavities are connected to the sliding sleeve (4) (9) through the floating valve (21), the air hole, the partition (8) and the air pipe in turn, the outer diameter of the piston (12) is equal to the inner diameter of the cylinder (1), the inlet (7) is connected to the cavity through the side port, the bottom of the side port is welded with a stopper, the piston (12) is connected to the bottom of the cylinder (1) and the top of the partition (10) respectively through the tension spring (13),The filter screen (14) is arranged at the bottom of the piston (12); the outer diameter of the spacer (25) is equal to the inner diameter of the inner tube (11); the number of the spacer (25) and the through-port (24) is three; the three spacers (25) are connected by a connecting rod (28); the inner tube (11) is connected to the three inner cavities through the through-port (24); the support plate (29) is welded to the spacer (25) at the bottom; the support plate (29) is connected to the bottom of the inner tube (11) through a spring (26).

2. A sewage heavy metal detection sampling device according to claim 1, characterized in that: A screw hole is provided on one side of the inlet (7), an external thread is provided on the outer side of one side of the knob (16), an internal thread is provided on the inner side of the screw hole, and the external thread matches the internal thread.

3. A sewage heavy metal detection sampling device according to claim 1, characterized in that: A bayonet is provided on one side of the pressure valve (15), one end of the clamping column (17) is a smooth surface, and one end of the clamping column (17) is clamped on the inner side of the bayonet through the smooth surface.

4. A sewage heavy metal detection sampling device according to claim 1, characterized in that: The top end of the inner cylinder (11) is mounted at the center of the floating plate (2) through a bearing, the bottom end of the inner cylinder (11) passes through three partitions (10) in sequence and extends to the bottom of the cylinder body (1), and a stirring device (30) is welded to the outer side of the inner cylinder (11).

5. A sewage heavy metal detection sampling device according to claim 1, characterized in that: Valves are installed on the inner sides of the inlet pipe (22) and the outlet pipe (27); the outer side of the fan blade (23) is clamped on the inner side of the inlet pipe (22); and the bottom end of the fan blade (23) is welded to the top end of the inner tube (11) through a bracket.

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