CN111521444A - Water sample detection system - Google Patents

Abstract

The invention provides a water sample detection system, which belongs to the technical field of water sample detection. It solves the technical problem of low detection efficiency of the existing water sample detection system. The water sample detection system is equipped with a sampling cylinder, which includes a cylinder body, a sealing block and a rigid connecting rod arranged concentrically with the cylinder body. The outer peripheral surface of the sealing block is screwed and sealed with the inner wall of the lower end of the cylinder body. The one-way valve plate that opens and closes the sampling hole. The rigid connecting rod extends vertically from the upper port of the cylinder to the lower end of the cylinder and is fixedly connected with the sealing block. The upper end of the rigid connecting rod is connected with a cable that can drive the sampling cylinder to rise and fall. The upper part of the cylinder is provided with a hoist that can retract the rope, and the sampling device is also provided with a suction pipe arranged in parallel with the rigid connecting rod. The lower end of the suction pipe can be inserted into the cylinder, and the upper end of the suction pipe is connected with A conveying pipe, the other end of the conveying pipe is communicated with the sample storage barrel, and the conveying pipe is provided with a liquid pump capable of extracting the water sample in the sampling cylinder. The present invention makes sampling smoother and more efficient.

Description

A water sample detection system

technical field

The invention belongs to the field of water sample detection, and relates to a water sample detection system.

Background technique

A large amount of industrial wastewater will be produced in industrial production. Industrial wastewater needs to be purified before being discharged to ensure the quality of the water source. However, there are still some enterprises that do not comply with the discharge specifications for a long time. produced pollution. In order to detect the pollution of the groundwater source, it is necessary to take samples from the ground near the factory and conduct detection and analysis through a special water sample detection system.

For example, a computer technology-based water quality detection device for easy sampling, such as application number CN201810926590, includes a detection water tank. The top and bottom of the outer wall of one side of the detection water tank are respectively equipped with a water inlet pipe and a water outlet pipe through bolts, and the water inlet pipe is far away from the detection A first suction pump is installed on the outer wall of one end of the water tank through bolts, the water inlet end of the first suction pump is connected with a diverter valve through a water pipe, and the outer wall of one end of the diverter valve away from the first suction pump is installed with an equidistantly distributed diversion valve through bolts A solenoid valve is installed on the circumferential outer wall of the shunt pipe through bolts. The above detection device can improve the detection accuracy of water samples through a computer, and ensure the quality of analysis and detection.

The Chinese patent with the authorization announcement number of CN202853935U provides a special sampling device, including: pulley, traction rope, wellhead fixing frame, handle, tank body, the pulley is fixed on the wellhead fixing frame, and the traction rope passes through the pulley and the upper end of the handle Connection, the upper two sides of the tank body are provided with lifting ears, the handle is connected with the tank body through the lifting ears, two movable semicircular fan plates are arranged at the upper end of the tank body, a circular hole is opened at the bottom of the tank body, and the upper part of the inner wall of the tank body bottom is provided A baffle is arranged, and a movable rubber round pad is arranged between the bottom of the tank and the baffle.

The above sampling device can realize the sampling of water samples, but the traction rope is connected to the tank body through the handle and then through the handle, and there will be relative swings between the handle and the flexible traction rope and the handle, which is difficult to achieve. To ensure smooth sampling, it affects the efficiency. In addition, from sampling to injection into the water quality testing device, it needs to be completed independently. There is a risk of water sample pollution during the transportation process and the efficiency is low. In order to solve the above problems, those skilled in the art usually consider such as: 1. Use a container with better sealing to store the water sample after sampling and transport it to the detection device for injection, so as to reduce the pollution during the transportation process; 2. Speed up the operation Speed, such as increasing the operating speed of the sampling device, improves overall efficiency.

SUMMARY OF THE INVENTION

Aiming at the above problems existing in the prior art, the present invention provides a water sample detection system. The technical problem to be solved by the present invention is that the sampling and detection efficiency is low.

The object of the present invention can be realized through the following technical solutions:

A water sample detection system, comprising a sampling device and a detection device for analyzing water samples, characterized in that a sample storage barrel is arranged between the sampling device and the detection device, and the sample storage barrel is connected to the detection device The sampling device is provided with a vertically arranged sampling cylinder, the sampling cylinder includes a cylinder body, a sealing block and a rigid connecting rod arranged concentrically with the cylinder body, and the outer peripheral surface of the sealing block is connected to the cylinder. The inner side wall of the lower end of the body is screwed and sealed, and the sealing block has a sampling hole that penetrates up and down and a one-way valve plate for opening and closing the sampling hole. The rigid connecting rod is vertical from the upper port of the cylinder body. It extends to the lower end of the cylinder body and is fixedly connected with the sealing block. The upper end of the rigid connecting rod is connected with a rope that can drive the sampling cylinder to rise and fall. The upper part of the cylinder body is provided with a hoist that can retract the rope. The sampling device is also provided with a suction pipe arranged in parallel with the rigid connecting rod, the lower end of the suction pipe can be inserted into the cylinder, the upper end of the suction pipe is connected with a conveying pipe, and the conveying pipe is The other end is communicated with the sample storage barrel, and the conveying pipe is provided with a liquid pump capable of extracting the water sample in the sampling barrel.

The sampling device is used to collect water samples in the sampling well, and the detection device can detect and analyze the collected water samples to judge the pollution situation. A sample storage barrel communicated with the detection device is arranged between the sampling device and the detection device, the sampling cylinder is arranged vertically in the sampling device, and the sampling cylinder and the sample storage barrel are communicated through a suction pipe and a conveying pipe, and the suction pump is used to extract the sample. The water sample in the sampling cylinder, so that after the sampling cylinder is collected, the pump can immediately extract the water sample in the sampling cylinder into the storage cylinder through the conveying pipe and the suction pipe, so as to realize the rapid transfer of the water sample in the closed channel. , higher efficiency and less pollution. At the same time, the sample storage barrel is connected to the detection device, so that the detection device can directly extract water samples from the sample storage barrel for detection, and the sampling and detection efficiency is higher; and rigid connecting rod, so that the sealing block is connected to the inner edge of the lower end of the cylinder, the lower end of the rigid connecting rod is fixedly connected with the sealing block, and is connected with the upper end of the rigid connecting rod through the rope and the sampling cylinder is driven by the hoist to move up and down, and then the sampling cylinder is moved up and down. The suction pipe in the device is parallel to the rigid connecting rod, so that since the rigid connecting rod extends from the upper end of the cylinder to the sealing block and is fixedly connected with it, the rigid connecting rod and the sealing block will not be relatively shaken, and the sealing block itself has a relative sway. The larger weight and the formation of the bottom of the sampling cylinder make the overall center of gravity focus on the lower end of the rigid connecting rod, so that the state of the entire sampling cylinder is more stable during the lifting and lowering process. It works well in the center of the sampling cylinder, which further eases the swing during the lifting process of the sampling cylinder, making the sampling process smooth and more efficient. In addition, the hoist replaces manual operation, so that the entire sampling cylinder can be lifted and lowered faster and the force is more uniform and stable. The efficiency is higher, and the suction tube will not interfere with the cylinder body or the rigid connecting rod when the sampling cylinder is reset for sampling, so that the sampling cylinder moves more smoothly and further ensures the efficiency of sampling detection.

In the above water sample detection system, the top of the sealing block has a connecting plate in the shape of an arch bridge, the lower end of the rigid connecting rod is fixedly connected with the connecting plate, and the middle section of the connecting plate is located on the one-way sealing sheet There is a travel space just above the one-way sealing sheet and the one-way valve sheet can abut against the connecting plate in a limited position when the one-way valve sheet is opened. By arranging a connecting plate in the shape of an arch bridge on the top of the sealing block, the rigid connecting rod and the connecting plate are fixedly connected, and a travel space is formed between the middle section of the connecting plate and the one-way sealing sheet, so that the one-way sealing sheet can be opened and closed normally , the connecting plate directly above the one-way sealing sheet can prevent the one-way sealing sheet from being overturned due to the action of water pressure and difficult to reset to affect the sealing effect by abutting against the limit.

In the above water sample detection system, both the connecting plate and the sampling hole are located in the center of the sealing block, and the sampling hole vertically penetrates the sealing block. By arranging that the connecting plate and the sampling hole are located in the center of the sealing block, and the sampling hole vertically penetrates the sealing block, it is further ensured that the center of gravity of the entire sampling cylinder can be located at its geometric center, so that the state of the sampling cylinder is more stable.

In the above water sample detection system, the outer edge of the top surface of the sealing block has a guide cut surface extending in the circumferential direction, and the guide cut surface is in the shape of a conical surface. By arranging a tapered guide cut surface on the outer edge of the top surface of the sealing block, the positioning and assembling of the sealing block and the cylinder body are facilitated, and the portability of installation is improved.

In the above water sample detection system, the top of the sample storage bucket is provided with a liquid level sensor capable of detecting the height of the water sample in the sample storage bucket. By setting a liquid level sensor on the top of the sample storage tank, the extraction of water samples in the sample storage tank can be monitored in real time, which is convenient for users to quickly and accurately store the sample status.

In the above water sample detection system, a floating ball that can float with the water sample is arranged in the sample storage barrel. A floating ball that can float with the water sample is arranged in the storage tank, which is convenient for users to quickly identify the reaction when the water sample in the storage tank is too much.

In the above water sample detection system, the bottom of the sample storage bucket has a drain pipe that can communicate with the outside world. By arranging a drain pipe at the bottom of the sample storage barrel, it is convenient to discharge and clean the remaining water samples in the sample storage barrel after the detection is completed, so as to avoid pollution to the water sample drawn next time.

In the above water sample detection system, the sampling device is further provided with a travel switch for controlling the stop of the hoist, and the contact of the travel switch is vertically aligned with the upper end of the sampling cylinder. The travel switch stops the hoist when the drum moves upward until it touches the contact of the travel switch. By setting the travel switch in the sampling device, the contact of the travel switch is set on the vertical motion track of the sampling cylinder, which is convenient for the sampling cylinder to contact the travel switch and control the hoist to close when it rises in place, so as to avoid the damage to the components caused by the excessive rise of the sampling cylinder. .

Compared with the prior art, the advantages of the present invention are as follows:

The water sample detection system is connected with the upper end of the rigid link through a rope, and the hoist drives the sampling cylinder to move up and down, so that the hoist replaces manual operation, so that the lifting speed of the sampling cylinder is faster, the force is more uniform and stable, and the operation efficiency is higher. The rigid connecting rod can better ensure that the rope pulling force can act on the center of the sampling cylinder, relieve the swing of the sampling cylinder during the lifting process, and make the sampling smoother and more efficient. The parallel arrangement of the suction pipe and the rigid connecting rod can ensure the lifting and lowering of the sampling cylinder. During the process, it will not interfere with the suction pipe and affect the smoothness of sampling. At the same time, the lower end of the suction pipe can be inserted into the sampling cylinder. After the sampling cylinder collects water samples, it is convenient for the suction pipe to directly contact the water sample. The conveying pipe of the sample storage barrel is connected, and a pumping pump is installed on the conveying pipe, so that the pumping pump can immediately extract the water sample in the sampling cylinder to the storage tank through the conveying pipe and the suction pipe after the sampling is completed. It can realize the rapid transfer of water samples in the closed channel, with higher efficiency and less pollution. At the same time, the sample storage tank is connected with the detection device, so that the detection device can directly extract water samples from the sample storage tank for detection, and the sampling and detection efficiency is higher. .

Description of drawings

FIG. 1 is a schematic three-dimensional structure diagram of the first embodiment.

FIG. 2 is a schematic cross-sectional structure diagram of the first embodiment.

FIG. 3 is a schematic three-dimensional structure diagram of the sampling device in the first embodiment.

FIG. 4 is a schematic cross-sectional structure diagram of the sampling device in the first embodiment.

FIG. 5 is an enlarged view of part A in FIG. 4 .

FIG. 6 is a partial three-dimensional structural diagram of the sampling device in the first embodiment.

FIG. 7 is a schematic diagram of the explosion structure of the sampling cylinder in the first embodiment.

FIG. 8 is a schematic cross-sectional structure diagram of the portable sampling device in the second embodiment.

FIG. 9 is an enlarged view of part B in FIG. 8 .

In the figure, 101, sampling device; 102, detection device;

1. Bracket; 11. Positioning hole; 12. Guide hole; 13. Guide sleeve; 14. Connecting plate;

2. Sampling cylinder; 21, cylinder body; 22, sealing block; 221, sampling hole; 222, connecting plate; 223, travel space; 224, guide section; 23, one-way valve plate; 24, rigid connecting rod;

3. Rope; 4. Hoist;

5. Sample storage barrel; 51. Float ball; 52. Drain pipe; 53. Liquid level sensor;

6. Suction pipe;

7. Delivery pipe; 71. Liquid pump;

8. Travel switch;

9. Floating plate; 91. Filter hole.

Detailed ways

The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solutions of the present invention, but the present invention is not limited to these embodiments.

Example 1:

As shown in Figures 1-7, the water sample detection system includes a sampling device 101, a sample storage tank 5 and a detection device 102 for analyzing water samples. The sample storage tank 5 is in communication with the detection device 102, and the sampling device 101 and the sample storage A conveying pipe 7 is arranged between the barrels 5 and a liquid pump 71 is arranged on the conveying pipe 7. The sampling device 101 includes a support 1, and a vertically arranged sampling cylinder 2 is arranged in the support 1. The sampling cylinder 2 is connected with a driveable sampling cylinder. 2. The rope 3 that moves up and down, the bracket 1 also has a positioning hole 11 for the rope 3 to pass through and two guide holes 12 arranged concentrically in the vertical direction. The diameter of the positioning hole 11 is adapted to the diameter of the rope 3 , the lower end of the positioning hole 11 is located directly above the guide hole 12 and is vertically aligned with the center of the guide hole 12, the outer edge shape of the sampling cylinder 2 is matched with the inner edge shape of the guide hole 12, and the sampling cylinder 2 can be along the The inner wall of the guide hole 12 moves up and down. The sampling device 101 is used to collect water samples in the sampling well, the sample storage bucket 5 can store the collected water samples so that the detection device 102 can perform detection and analysis in batches, and the conveying pipe 7 is used to collect the collected water samples from the sampling The device 101 is transported to the sample storage barrel 5 and the detection device 102 in sequence, and the liquid pump 71 can provide sufficient power to extract the water sample from the transport pipe 7; a vertically arranged sampling cylinder 2 is arranged in the support 1 of the sampling device 101, and the sampling cylinder 2. The water sample can enter the sampling cylinder 2 through contact with the water sample, and the rise and fall of the sampling cylinder 2 can be controlled by the rope 3 connected to the sampling cylinder 2. By arranging a positioning hole 11 for the cable 3 to pass through and two guide holes 12 arranged concentrically in the vertical direction on the bracket 1, the lower end of the positioning hole 11 is aligned with the center of the guide hole 12, and the sampling cylinder 2 It can be matched with the guide hole 12, so that the position of the rope 3 passing through the positioning hole 11 is constrained above the center of the guide hole 12, so that the pulling force direction of the rope 3 can pass through the center of the sampling cylinder 2, so as to ensure that the rope 3 And the sampling cylinder 2 can be stably in a vertical state during the retraction process, and the sampling cylinder 2 located in the guide hole 12 is constrained by the inner side wall of the guide hole 12 to prevent it from swinging left and right during the descending process, so that it only needs to be The sampling device 101 is placed on the ground, the lower end of the sampling cylinder 2 is vertically aligned with the drilled small-diameter wellhead, and the rope 3 is controlled to be lowered. During the process of placing the sampling cylinder 2 into the small-diameter wellhead from the initial state, the rope 3 remains vertical. Straight and stable, and the sampling cylinder 2 is guided by the side walls of multiple guide holes 12, so the sampling cylinder 2 can smoothly enter the small-diameter wellhead as a whole. Vertical state until the sampling is completed, and convenient sampling in the small diameter wellhead is realized. Further, the sampling cylinder 2 includes a cylinder body 21 and a sealing block 22 which is sealedly connected to the lower end of the cylinder body 21. The outer edge of the sealing block 22 is screwed and sealed with the inner edge of the sampling cylinder 2, and the sealing block 22 has a vertical through-hole The sampling hole 221 is in communication with the inner cavity of the cylinder body 21 , and the upper surface of the sealing block 22 is provided with a one-way valve plate 23 for controlling the opening and closing of the upper end of the sampling hole 221 . By setting the sampling cylinder 2 to include a cylinder body 21 and a sealing block 22 sealingly connected to the lower end of the cylinder body 21, the outer edge of the top surface of the sealing block 22 has a guide cut surface 224 extending in the circumferential direction, and the guide cut surface 224 is in the shape of a conical surface. The center of the sealing block 22 is provided with a sampling hole 221 communicating with the inner cavity of the cylinder body 21, and a one-way valve plate 23 for controlling the opening and closing of the sampling hole 221 is set on the sealing block 22. The sealing block 22 can increase the weight of the entire sampling cylinder 2, Ensure that the rope 3 can be straightened during the lifting process and can reduce the influence of external force on the position state of the sampling cylinder 2. The sealing block 22 is arranged at the bottom of the cylinder body 21 and can lower the center of gravity of the sampling cylinder 2 so that the state of the cylinder body 21 can be lowered. More stable, when the sampling cylinder 2 is in contact with the water sample, a larger amount of water sample can be pushed up the valve plate and enter the cylinder body 21 . The top of the sealing block 22 has an arch bridge-shaped connecting plate 222. The middle section of the connecting plate 222 is located directly above the one-way valve plate 23 and forms a travel space 223 with the one-way valve plate 23. When the one-way valve plate 23 is opened, it can be opened. Abutting against the middle section of the connecting plate 222, a rigid connecting rod 24 is fixedly connected to the connecting plate 222, the rigid connecting rod 24 is arranged vertically and is coaxial with the cylinder body 21, and the upper end of the rigid connecting rod 24 is in phase with the rope 3. connect. By fixing the vertical rigid link 24 on the top of the sealing block 22, the rigid link 24 is coaxial with the cylinder 21 and the upper end of the rigid link 24 is connected with the cable 3, the rigid link 24 can ensure the cable 3 The force application point of 3 reduces its deflection on the axis of sampling cylinder 2. Preferably, the upper end of the rigid link 24 protrudes from the upper end of the cylindrical body 21 . By setting the upper end of the rigid link 24 to protrude from the upper end of the cylinder 21, it is convenient for the operator to connect and disassemble the cable 3 and the rigid link 24 during the maintenance process. The length of the rope 3 extending out of the positioning hole 11 is shorter, so that in the process of lowering the sampling cylinder 2, the rope 3 can reduce its swing amplitude due to its higher rigidity, so that the sampling cylinder 2 is not easily deflected during the process of entering the small diameter wellhead. Inclined, the operation is smoother. The bracket 1 is provided with a hoist 4 capable of retracting and unwinding the rope 3 . The hoist 4 is located directly above the positioning hole 11 , and the positioning hole 11 penetrates vertically. By setting the hoist 4 on the bracket 1 to control the retraction and unwinding of the rope 3, the hoist 4 has a more stable and uniform retraction and retraction speed through electric control, which can alleviate the phenomenon that the sampling cylinder 2 swings due to uneven speed and strength of manual retraction, and further Ensure smooth sampling; set the winch 4 directly above the positioning hole 11 and the positioning hole 11 is vertically penetrated, so as to ensure that the cable 3 can be as close to the vertical state as possible during the process of retracting and unwinding the cable 3 by the winch 4. The influence of the rope 3 on the state and position of the sampling cylinder 2 due to friction. The bracket 1 is also provided with a travel switch 8 for controlling the stop of the two hoists 4. The contact of the travel switch 8 is vertically opposite to the upper end of the sampling cylinder 2. When the sampling cylinder 2 moves upward to the contact with the travel switch 8. When touched, the travel switch 8 shuts down the hoist 4, and the two travel switches 8 are arranged in sequence in the vertical direction to provide double insurance. By arranging the travel switch 8 on the bracket 1, the contact of the travel switch 8 is arranged on the vertical motion trajectory of the sampling cylinder 2, so that the sampling cylinder 2 can be brought into contact with the travel switch 8 and control the hoist 4 to close when the sampling cylinder 2 rises in place, so as to avoid sampling Excessive lifting of cartridge 2 causes component damage.

As shown in FIGS. 1-4 and 6 , two horn-shaped guide sleeves 13 are fixed on the bracket 1 , and each guide sleeve 13 is vertically positioned directly below the guide hole 12 and arranged concentrically with the guide hole 12 , the upper end of the guide sleeve 13 is a small end, and the inner edge surface of the upper end of the guide sleeve 13 and the inner edge surface of the corresponding guide hole 12 smoothly transition. When the sampling cylinder 2 is completed and lifted up by the rope 3, the sampling cylinder 2 will oscillate due to the shaking of the water sample. The small end is concentric with the guide hole 12 and the inner wall of the guide sleeve 13 and the inner wall of the guide hole 12 smoothly transition, and the large port diameter of the guide sleeve 13 is larger, so that when the sampling cylinder 2 rises to the bracket 1, the upper end of the sampling cylinder 2 can be smoothly Enter the big end of the guide sleeve 13 and abut against its inner side wall, and then the sampling cylinder 2 can slide along the inner side wall of the guide sleeve 13 and smoothly reset to the guide hole 12 when it continues to rise, so as to avoid the sampling cylinder 2 being bumped and stuck during the reset process. The reset position and state are also accurately stabilized to ensure subsequent sampling effects. The bracket 1 has several horizontally arranged connecting plates 14 . The several connecting plates 14 are arranged at intervals up and down. The guide holes 12 are located on the connecting plates 14 . By arranging a horizontal connecting plate 14 in the bracket 1, the guide hole 12 is opened on the connecting plate 14, and the guide sleeve 13 is fixedly connected with the connecting plate 14, so that the guiding and restraining of the sampling cylinder 2 is realized through the connecting plate 14, so that the sampling device 101 The structure is more streamlined, which is conducive to weight control and improves the convenience of use. A vertically arranged suction pipe 6 is fixed in the bracket 1 , the upper end of the suction pipe 6 is communicated with the conveying pipe 7 , and the lower end of the suction pipe 6 is inserted into the sampling cylinder 2 . By arranging the vertical suction tube 6 on the support 1, the suction tube 6 can be inserted into the sampling tube 2, so that the suction tube 6 will not interfere with the sampling tube 2 during the movement and lifting process, and the upper end of the suction tube 6 will not interfere with it. The connected delivery pipe 7 can draw out the water sample in the sampling tube 2 through the suction pipe 6 for the convenience of detection.

As shown in FIG. 1 and FIG. 2 , the sample storage barrel 5 is provided with a floating ball 51 for indicating the position of the page, and the bottom of the sample storage barrel 5 has a drain pipe 52 for discharging waste liquid. By arranging the floating ball 51 in the sample storage bucket 5, it is convenient for the user to observe the extraction of the water sample through the floating ball 51. The remaining water samples are drained and cleaned to avoid contamination of the next water samples.

Embodiment 2:

As shown in FIG. 8 and FIG. 9 , this embodiment is basically the same as the first embodiment, except that the outer peripheral surface of the rigid link 24 is sleeved with a floating plate 9 that can slide up and down, and the floating plate 9 is a lightweight material part And it can float on the surface of the water sample. The diameter of the outer edge of the floating plate 9 is slightly smaller than the inner diameter of the cylinder 21 . The floating plate 9 has a plurality of filter holes 91 that pass through up and down. The lines are arranged in an annular shape, and the lower end of the suction pipe 6 can be vertically aligned with at least one filter hole 91 . In this way, when the sampling cylinder 2 is completed, the floating plate 9 will float on the surface of the water sample, and at the same time, the floating plate 9 is restrained by the cylinder body 21 and the rigid connecting rod 24 and can maintain a horizontal state, so that the floating plate 9 can be used for the sampling cylinder 2. The water sample has a restraining effect, reducing the wave and shaking of the water sample during the rising process of the sampling cylinder 2, so that the center of gravity of the entire sampling cylinder 2 can be kept stable during the rising process and the oscillation phenomenon can be alleviated, further improving the convenience of sampling in small-diameter wellheads ; After rising in place, the lower end of the suction pipe 6 can abut against the floating plate 9 and press it into the water sample, because the volume of the floating plate 9 is not large and will not produce excessive resistance, and the filter holes 91 on the floating plate 9 It can be ensured that when the suction pipe 6 abuts against the floating plate 9, the effect of blocking the water sample drawn by the suction pipe 6 will not be caused, so as to ensure normal operation.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which the present invention pertains can make various modifications or additions to the described specific embodiments or substitute in similar manners, but will not deviate from the spirit of the present invention or go beyond the definitions of the appended claims range.

Claims (8)

1. The water sample detection system comprises a sampling device (101) and a detection device (102) for analyzing a water sample, and is characterized in that a sample storage barrel (5) is arranged between the sampling device (101) and the detection device (102), the sample storage barrel (5) is communicated with the detection device (102), a vertically-arranged sampling barrel (2) is arranged in the sampling device (101), the sampling barrel (2) comprises a barrel body (21), a sealing block (22) and a rigid connecting rod (24) concentrically arranged with the barrel body (21), the outer peripheral surface of the sealing block (22) is in threaded connection with the inner side wall of the lower end of the barrel body (21), the sealing block (22) is provided with a vertically-through sampling hole (221) and a one-way valve plate (23) for opening and closing the sampling hole (221), the rigid connecting rod (24) vertically extends to the lower end of the barrel body (21) from the upper port of the barrel body (21) and is fixedly connected with the sealing block (22), the upper end of this rigidity connecting rod (24) is connected with rope (3) that can drive sampling tube (2) and go up and down, the top of barrel (21) is equipped with can receive and release hoist engine (4) of rope (3), still be equipped with in this sampling device (101) with rigidity connecting rod (24) parallel arrangement's pump line (6), the lower extreme of pump line (6) can be inserted and locate in barrel (21), the upper end intercommunication of pump line (6) has conveyer pipe (7), the other end of conveyer pipe (7) with sample storage bucket (5) are linked together, are equipped with on this conveyer pipe (7) and can extract the drawing pump (71) of the water sample in the sampling tube (2).

2. The water sample detection system according to claim 1, wherein a connecting plate (222) in an arch bridge shape is arranged at the top of the sealing block (22), the lower end of the rigid connecting rod (24) is fixedly connected with the connecting plate (222), the middle section of the connecting plate (222) is located right above the one-way sealing piece, a stroke space (223) is arranged between the connecting plate and the one-way sealing piece, and the connecting plate (222) can be in limit abutting contact with the one-way sealing piece (23) when the one-way sealing piece is opened.

3. A water sample detection system as claimed in claim 2 wherein the connection plate (222) and the sampling hole (221) are both located centrally of the sealing block (22), the sampling hole (221) extending vertically through the sealing block (22).

4. A water sample detection system as claimed in claim 3 wherein the sealing block (22) has a circumferentially extending guide section (224) at its top peripheral edge, the guide section (224) being conical.

5. A water sample detection system as claimed in claim 4, wherein the top of the sample storage barrel (5) is provided with a liquid level sensor (53) capable of detecting the height of the water sample in the sample storage barrel (5).

6. A water sample detection system according to claim 1 or 2 or 3 or 4 or 5, characterized in that a floating ball (51) capable of floating with the water sample is arranged in the sample storage barrel (5).

7. A water sample detection system according to claim 2 or 3 or 4 or 5, characterized in that the bottom of the sample storage barrel (5) is provided with a drain pipe (52) which can be communicated with the outside.

8. The water sample detection system according to claim 7, wherein a travel switch (8) for controlling the winch (4) to stop is further arranged in the sampling device (101), a contact of the travel switch (8) is vertically opposite to the upper end of the sampling cylinder (2), and when the sampling cylinder (2) moves upwards to touch the contact of the travel switch (8), the travel switch (8) stops the winch (4).

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