A rapid sampling device for heavy metal detection in water

Abstract

The present invention relates to the technical field of water samplers, and specifically discloses a rapid sampling device for heavy metal detection of water quality, comprising a barrel, a plurality of working chambers on the outer peripheral side of the barrel, each of which is provided with a sampling barrel and a clamp, each of which is provided with a cover plate near the side wall outside the barrel, a quick-release joint at the lower end of the sampling barrel, and a piston movably mounted in the sampling barrel; two clamps are rotatably installed in the working chambers, respectively, a locking plate for tightly closing the two clamps is provided on the inner side of the cover plate, and the opposite sides of the two clamps are provided with a receiving chamber respectively to fix the sampling bag between the two clamps, a pressing plate is provided in the receiving chamber, a spring is provided between the pressing plate and the clamp, an air hole connected to an air bag is provided on the side wall of the receiving chamber away from the pressing plate, and a vent pipe connected to the sampling barrel is provided on the air bag. The rapid sampling device for heavy metal detection of water quality simplifies the operation process, improves the sampling efficiency, and reduces the risk of sample contamination.

Description

Technical Field

[0001] The invention relates to the technical field of water samplers, and in particular to a rapid sampling device for heavy metal detection in water quality. Background Art

[0002] Seawater monitoring is an important part of marine environmental monitoring, which aims to monitor and evaluate the seawater environment in real time through scientific means to ensure the health of marine ecology, protect marine resources, prevent marine disasters and support marine scientific research. When testing heavy metals such as lead, mercury, cadmium and chromium in seawater, it is necessary to use a water sampler to collect water samples from seawater. The water sampler can collect water samples from different depths and water layers of the ocean. These water samples are the basis for seawater monitoring.

[0003] A Chinese patent document with authorization announcement number CN116358932B discloses a seawater detection sampling device. When sampling, the vertical rod is fixed to the cable of the winch. After fixing, the device can be put into the area where sampling is required, and then the cable is paid out by the winch to make the device sink in the seawater. After the winch pays out the cable to the required depth, the payout is stopped, and the sampling operation is performed by controlling one of the sampling mechanisms. The telescopic end of the electric telescopic rod is shortened, so that the connecting block gradually moves away from the lateral end of the assembly tube. Therefore, under the elastic rebound of the spring, the steel wire connected between the two connecting plates and the connecting block continues to be straightened, and the two connecting plates move away, so that the two longitudinal sliding rods slide away, and the two covers are opened, and seawater can enter the sampling tube for sampling. After sampling, the electric telescopic rod returns to the initial state to close the sampling tube, and the cable is paid out by the winch to make the device sink to different depths, and sampling is performed at different depths through each sampling mechanism respectively, so that seawater samples of multiple depths can be obtained at one time.

[0004] However, after the sampling is completed and the device is pulled out of the seawater, the above-mentioned seawater detection sampling device in the prior art requires the staff to wear sterile gloves, align the opening of the sampling bag with the outlet of the sampling tube, and then open the switch valve of the lower cover to carefully transfer the seawater obtained by the sampling tube into the clean sampling bag, and ensure that no sample part is lost during the transfer process, especially the sediment or suspended particles at the bottom. Such a sampling device requires more steps and tools, the operation process is more complicated, the sampling efficiency is low, and when the sample is manually transferred, the staff may accidentally touch the sample, increasing the risk of sample contamination. Summary of the invention

[0005] The present invention provides a rapid sampling device for heavy metal detection in water, aiming to solve the problems of complicated operation process, low sampling efficiency and increased risk of sample contamination in seawater detection sampling devices in related technologies.

[0006] The present invention provides a rapid sampling device for heavy metal detection in water, which adopts the following technical solution:

[0007] A rapid sampling device for heavy metal detection in water, comprising a barrel, the outer peripheral side of the barrel having a plurality of working chambers, each of the working chambers being provided with a sampling barrel and two clamping plates, each of the working chambers being provided with a cover plate near the side wall outside the barrel, a quick-release joint for installing a sampling bag being provided at the lower end of the sampling barrel, and a piston being installed in the sampling barrel for movement along the length direction of the sampling barrel;

[0008] The two splints are rotatably installed in the working chamber on one side close to the cylinder body so that the two splints can be opened and closed. The inner side of the cover plate is provided with a locking plate for tightly closing the two splints. The opposite sides of the two splints are respectively provided with a accommodating chamber to fix the sampling bag between the two splints. A pressure plate is provided in the accommodating chamber. A spring is provided between the pressure plate and the splint to apply elastic force to the pressure plate so that the pressure plate squeezes the sampling bag, thereby exhausting the air in the sampling bag. The side wall of the accommodating chamber facing away from the pressure plate is provided with an air hole connected to the airbag, and the airbag is provided with a vent pipe connected to the sampling cylinder.

[0009] By adopting the above technical solution, the sampling bag is installed on the sampling barrel through the quick-release joint. When the piston is pulled to make the sampling barrel extract external seawater, the seawater in the sampling barrel is directly introduced into the sampling bag, which can reduce the steps and tools of manual sample transfer, simplify the sampling operation process, and reduce the risk of sample contamination during manual sample transfer. The setting of the quick-release joint can also make the installation and removal of the sampling bag quick, reduce the operation time, and further improve the sampling efficiency. After the sampling is completed, the seawater in the sampling barrel that has not been collected into the sampling bag can be pushed out by pushing the piston, so as to clean the sampling barrel and play a sealing role to avoid The water sample in the sampling bag is prevented from contacting with the outside world, thereby ensuring the accuracy of sampling; by arranging an air bag between the containing chamber and the sampling tube, when the sampling bag is sampling, the excess gas squeezed out by the expansion of the sampling bag in the two clamping plates can be stored through the air holes, so that the pressure plate and the containing chamber can support and limit the sampling bag, thereby preventing the sampling bag from being damaged due to excessive water pressure, thereby ensuring the smooth progress of the sampling process, and when the piston pushes out the uncollected seawater in the sampling tube, the stored gas is introduced into the sampling tube through the ventilation pipe to maintain the positive pressure state in the sampling tube, thereby preventing the water sample collected in the sampling bag from re-entering the sampling tube, thereby further ensuring the accuracy of sampling.

[0010] Preferably, the splint also has a ventilation chamber connected to the accommodating chamber, the ventilation chamber is located on the side of the accommodating chamber away from the sampling bag, the side wall of the ventilation chamber facing the sampling bag is provided with a sleeve and a ventilation seat, the pressure plate is provided with a guide rod slidingly matched with the sleeve, the ventilation seat is provided with the air hole, the spring is installed in the ventilation seat, the splint is provided with an air box located on the side of the ventilation seat away from the pressure plate and connected to the air hole, the air bag is installed on the air box and connected to the air box.

[0011] Preferably, a lever is rotatably mounted on the air box, a lock is provided at the end of the lever extending into the air box, a torsion spring is provided between the lever and the air box, a through hole connected to the air box is provided on the vent seat, a through rod slidably engaged with the through hole is provided on the pressure plate, and a buckle that can be snap-fitted with the lock to lock the pressure plate is provided at the end of the through rod extending into the air box.

[0012] By adopting the above technical solution, the position of the pressure plate can be locked through snap-fitting to ensure that the pressure plate stably supports the sampling bag during the sampling process.

[0013] Preferably, the lock head is in the shape of an elongated strip, and the buckle includes a buckle slot and two buckle claws, the open end of the buckle slot faces the lock head, and the two buckle claws are respectively arranged on both sides of the open end of the buckle slot and extend inwardly, and after the lock head is inserted into the buckle slot, the two buckle claws respectively abut against the upper and lower ends of the lock head to prevent the lock head from detaching from the buckle slot.

[0014] Preferably, the side wall of the working chamber is provided with an unlocking block capable of pushing the lever so that the lever drives the lock head to rotate, and the lock head can be rotated until the width direction of the lock head corresponds to the open end of the buckle slot so that the lock head can be disengaged from the buckle slot.

[0015] Preferably, a rotating shaft is respectively provided on one side of the two splints close to the cylinder body, the rotating shaft is rotatably installed in the working chamber, gears are provided on the rotating shaft, the gears provided on the two rotating shafts are meshed with each other, the cover plate is hinged on the cylinder body on one side of the splints close to one of the splints, and the lock plate is provided on the side of the cover plate close to the other splint, after the cover plate is closed, the lock plate can abut against the outer wall of the splint to limit the rotation of the splint.

[0016] By adopting the above technical scheme, the gear is set to make the two splints rotate inward or outward synchronously, so as to facilitate the opening and closing of the two splints; after the locking plate abuts against the outer wall of the adjacent splint, the two splints rotate synchronously due to the restriction of the gear meshing, and the two splints can remain tightly closed under the limit of the locking plate, with a simple structure and easy operation.

[0017] Preferably, the plurality of working chambers form working units along the circumference of the cylinder, and the working units are provided in plurality and distributed on the cylinder along the height direction of the cylinder to collect water samples of different depths. The rapid sampling device for heavy metal detection in water quality also includes a sealing frame that is mounted on the outer wall of the cylinder and moves up and down, and the sealing frame is used to prevent the cover from opening outward.

[0018] Preferably, a handle is provided on the outer side surface of each cover plate, and a sealed space is defined between the lower end of the handle and the lower end of the cover plate; the sealing frame comprises a sealing ring corresponding to each working unit and a plurality of vertical rods connected between the sealing rings; the sealing ring is located at the lower end of the working unit and can be moved upward to the sealed space to abut against the lower end of the handle; a column corresponding to each vertical rod is provided at the upper end of the cylinder; the vertical rod is assembled on the column by means of a sleeve ring so as to move up and down; threads are distributed on the outer circumference of at least two of the columns and nuts located below the sleeve ring are installed to limit the downward movement of the sealing frame.

[0019] By adopting the above technical solution, the vertical position of the sealing frame can be adjusted by rotating the nut to control the sealing or unlocking of the working chamber by the sealing frame.

[0020] Preferably, two quick-release connectors are provided at the lower end of the sampling cylinder to install two sampling bags, and the two clamps respectively have two accommodating chambers.

[0021] Preferably, the center of the cylinder has an installation chamber, a linear drive member is installed in the installation chamber, and the output end of the linear drive member is connected to the piston to drive the piston to move along the length direction of the sampling cylinder.

[0022] By adopting the above technical solution, the installation chamber is used to protect the linear drive component to prevent water or other liquids from entering and causing damage to the linear drive component, thereby ensuring the normal operation of the device.

[0023] The quick sampling device for heavy metal detection in water provided by the present invention has the following beneficial effects: the sampling bag is installed on the sampling barrel through the quick-release joint, and the seawater in the sampling barrel is directly introduced into the sampling bag during the process of pulling the piston to make the sampling barrel extract external seawater, which can reduce the steps and tools for manual sample transfer, simplify the sampling operation process, and reduce the risk of sample contamination during manual sample transfer. The setting of the quick-release joint can also make the installation and removal of the sampling bag faster, reduce the operation time, and further improve the sampling efficiency; after the sampling is completed, the seawater in the sampling barrel that has not been collected into the sampling bag can be pushed out by pushing the piston to clean the sampling barrel. The air bag is arranged between the accommodating chamber and the sampling tube, so that when the sampling bag is sampling, the excess gas squeezed out by the expansion of the sampling bag in the two clamping plates can be stored through the air holes, so that the pressing plate and the accommodating chamber can support and limit the sampling bag, so that the sampling bag can be prevented from being damaged due to excessive water pressure, so as to ensure the smooth progress of the sampling process, and when the piston pushes out the uncollected seawater in the sampling tube, the stored gas is introduced into the sampling tube through the vent pipe to maintain the positive pressure state in the sampling tube, so as to prevent the water sample collected in the sampling bag from re-entering the sampling tube, and further ensure the accuracy of sampling. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of a rapid sampling device for heavy metal detection in water quality according to the present invention.

[0025] Figure 2 It is a schematic structural diagram of a working chamber of a rapid sampling device for detecting heavy metals in water quality according to the present invention.

[0026] Figure 3 It is a first structural schematic diagram of two clamping plates of the rapid sampling device for heavy metal detection in water quality of the present invention.

[0027] Figure 4 It is a second structural schematic diagram of two clamping plates of the rapid sampling device for heavy metal detection in water quality of the present invention.

[0028] Figure 5 The present invention is a schematic structural diagram of a pressure plate and a ventilation chamber of a rapid sampling device for detecting heavy metals in water quality.

[0029] Figure 6 The invention is a schematic structural diagram of a buckle and a lock of a rapid sampling device for detecting heavy metals in water quality.

[0030] Figure 7 The invention is a schematic structural diagram of a cover plate of a rapid sampling device for detecting heavy metals in water quality.

[0031] Reference numerals:

[0032] 10. Cylinder; 110. Hanging buckle; 120. Column; 130. Link; 140. Thread; 150. Nut; 160. Support; 20. Working chamber; 210. Unlocking block; 30. Cover plate; 310. Handle; 320. Lock plate; 40. Sampling cylinder; 410. Quick-release connector; 420. Piston; 430. Linear drive member; 50. Clamp; 510. Rotating shaft; 520. Gear; 530. Accommodating chamber; 540. Ventilation chamber; 541. sleeve; 542. vent seat; 543. air hole; 544. perforation; 60. pressure plate; 610. spring; 620. guide rod; 630. through rod; 640. buckle; 641. buckle claw; 70. air box; 710. lever; 711. lock; 712. torsion spring; 720. air bag; 730. vent pipe; 740. synchronization rod; 80. sealing frame; 810. sealing ring; 820. vertical pole; 830. sleeve ring; 90. sampling bag. DETAILED DESCRIPTION

[0033] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0034] like Figures 1 to 7 As shown, an embodiment of the rapid sampling device for heavy metal detection in water quality of the present invention includes a cylinder 10, a cover plate 30, a sampling cylinder 40, a linear drive member 430, a clamping plate 50, a pressure plate 60, an air box 70, an air bag 720, a sealing frame 80 and a sampling bag 90.

[0035] like Figure 1 As shown, the cylinder 10 is a vertically placed cylindrical shape, and a support 160 is fixed to the lower surface of the cylinder 10 for supporting the cylinder 10. A plurality of columns 120 are fixed to the upper surface of the cylinder 10 along the circumference of the cylinder 10, and a link 130 is connected between the plurality of columns 120, wherein threads 140 are distributed on the outer circumference of two opposite columns 120 and nuts 150 are installed thereon, and a hanging buckle 110 is fixed to the center of the upper surface of the cylinder 10 for connecting a winch to place the sampling device into or pull it out of the seawater.

[0036] like Figure 1 and Figure 2 As shown, the outer circumference of the cylinder 10 has a plurality of working chambers 20, and the plurality of working chambers 20 form working units along the circumference of the cylinder 10. There are a plurality of working units, and they are distributed on the cylinder 10 along the height direction of the cylinder 10 to collect water samples at different depths. The center of the cylinder 10 has an installation chamber for installing a linear drive member 430, and the installation chamber has good sealing properties to prevent water or other liquids from entering.

[0037] like Figures 1 to 4 As shown, each working chamber 20 is provided with a sampling barrel 40, a clamping plate 50, a pressing plate 60, an air box 70 and an air bag 720. The sampling barrel 40 extends radially along the cylinder body 10 and is fixed at the top of the working chamber 20. The piston 420 is assembled in the sampling barrel 40 and moves along the length direction of the sampling barrel 40. The linear drive member 430 is an electric push rod, and the output end of the linear drive member 430 is connected to the piston 420 to drive the piston 420 to move along the length direction of the sampling barrel 40. In other embodiments, the linear drive member 430 may also be a hydraulic cylinder or a pneumatic cylinder. When the linear drive member 430 pulls the piston 420 to move into the cylinder body 10, negative pressure is generated inside the sampling cylinder 40 to suck the external seawater into the sampling cylinder 40 for sampling; when the linear drive member 430 pushes the piston 420 to move outside the cylinder body 10, the seawater in the sampling cylinder 40 that has not been collected into the sampling bag 90 can be pushed out to clean the sampling cylinder 40 and play a sealing role to prevent the water sample in the sampling bag 90 from contacting the outside world, thereby ensuring the accuracy of sampling.

[0038] like Figure 4 As shown, two quick-release joints 410 are provided at the lower end of each sampling barrel 40. The quick-release joints 410 are used to install the sampling bag 90, so that the seawater in the sampling barrel 40 can be directly introduced into the sampling bag 90 during the process of the sampling barrel 40 extracting external seawater, which can reduce the steps and tools for manual sample transfer, simplify the sampling operation process, and reduce the risk of sample contamination during manual sample transfer. In addition, through the provision of the quick-release joints 410, the installation and removal of the sampling bag 90 can be made quick, reducing the operation time and further improving the sampling efficiency.

[0039] like Figures 2 to 4 As shown, the two clamping plates 50 are located below the sampling barrel 40. A rotating shaft 510 is fixed to one side of the two clamping plates 50 close to the barrel body 10, and the rotating shaft 510 is rotatably installed in the working chamber 20 so that the two clamping plates 50 can be opened and closed. A gear 520 is fixed to the lower end of the rotating shaft 510, and the gears 520 on the two rotating shafts 510 are meshed with each other so that the two clamping plates 50 rotate inward or outward synchronously.

[0040] like Figures 4 to 6As shown, the two clamping plates 50 have two accommodating chambers 530 on opposite sides, respectively, so as to fix the two sampling bags 90 between the two clamping plates 50. The clamping plates 50 also have ventilation chambers 540 corresponding to and communicating with the accommodating chambers 530, and the ventilation chambers 540 are located on the side of the accommodating chambers 530 away from the sampling bags 90. A ventilation seat 542 and four sleeves 541 are fixed to the side wall of the ventilation chamber 540 facing the sampling bag 90, and a through hole 544 and a plurality of air holes 543 are provided on the ventilation seat 542. The pressing plate 60 is located in the accommodating chamber 530, and can be blocked at the connection between the ventilation chamber 540 and the accommodating chamber 530. A through rod 630 and four guide rods 620 are fixed on the pressure plate 60. The guide rod 620 slides with the sleeve 541 to enable the pressure plate 60 to move along the thickness direction of the clamp 50. The through rod 630 slides with the through hole 544. A spring 610 is provided between the through rod 630 and the vent seat 542 to apply elastic force to the pressure plate 60 so that the pressure plate 60 squeezes the sampling bag 90, thereby exhausting the air in the sampling bag 90.

[0041] like Figure 2 , Figure 3 , Figure 5 and Figure 6 As shown, the clamping plate 50 is fixed with an air box 70 located on the side of the vent seat 542 away from the pressure plate 60 and connected with the air hole 543 and the through hole 544. The air box 70 is cylindrical. A lever 710 is rotatably mounted on the air box 70. A lock 711 is fixed to the end of the lever 710 extending into the air box 70. The lock 711 is in the shape of a long strip. A torsion spring 712 is arranged between the lever 710 and the air box 70 to apply elastic force to the lever 710 so that the lever 710 has a rotation tendency to drive the lock 711 to maintain an inclined state. A buckle 640 that can be engaged with the lock 711 to lock the pressure plate 60 is fixed to the end of the through rod 630 extending into the air box 70. The buckle 640 includes a buckle slot and two buckle claws 641. The open end of the buckle slot faces the lock head 711. The two buckle claws 641 are respectively arranged on both sides of the open end of the buckle slot and extend inward. After the lock head 711 is inserted into the buckle slot in an inclined state, the two buckle claws 641 respectively abut against the upper and lower ends of the lock head 711 to prevent the lock head 711 from being separated from the buckle slot. A synchronization rod 740 is connected between the two levers 710 on each clamping plate 50 so that the two levers 710 rotate synchronously. An unlocking block 210 capable of pushing the lever 710 to rotate is fixed to the side wall of each working chamber 20 close to the cylinder 10 so that the lever 710 drives the lock head 711 to enter a vertical state. After the lock head 711 rotates to a vertical state, the width direction of the lock head 711 corresponds to the open end of the buckle slot so that the lock head 711 is separated from the buckle slot, thereby releasing the pressure plate 60.

[0042] like Figures 3 to 5As shown, an air bag 720 is installed between the two air boxes 70 on each clamp plate 50, and the two air boxes 70 are connected to the air bag 720 respectively. A vent pipe 730 connected to the sampling barrel 40 is provided on the air bag 720, and the vent pipe 730 is a hose. When the sampling bag 90 is sampling, the air bag 720 can store the excess gas in the two clamp plates 50 that is expanded and squeezed out by the sampling bag 90 through the air hole 543 and the air box 70, so that the pressing plate 60 and the accommodating chamber 530 support and limit the sampling bag 90, avoid the sampling bag 90 from being damaged due to excessive water pressure, and ensure the smooth progress of the sampling process; and when the piston 420 pushes out the uncollected seawater in the sampling barrel 40, the stored gas is passed into the sampling barrel 40 through the vent pipe 730 to maintain the positive pressure state in the sampling barrel 40, and avoid the water sample collected in the sampling bag 90 from re-entering the sampling barrel 40.

[0043] like Figure 1 , Figure 3 and Figure 7 As shown, a cover plate 30 is provided on the side wall of each working chamber 20 near the outside of the cylinder 10. The side of the cover plate 30 near one of the clamping plates 50 is hinged on the cylinder 10, and the side of the cover plate 30 near the other clamping plate 50 is provided with a locking plate 320, which is fixed to the inner side of the cover plate 30. After the cover plate 30 is closed, the locking plate 320 can abut against the outer wall of the adjacent clamping plate 50 to limit the clamping plate 50 from rotating outward. Since the two clamping plates 50 are restricted by the meshing of the gear 520 and rotate synchronously, the two clamping plates 50 can remain tightly closed under the limit of the locking plate 320, with a simple structure and convenient operation. A handle 310 is provided on the outer side of each cover plate 30 to facilitate the staff to open and close the cover plate 30, and there is a sealed space between the lower end of the handle 310 and the lower end of the cover plate 30.

[0044] like Figure 1 As shown, the sealing frame 80 is assembled on the outer side wall of the cylinder 10 by moving up and down, and the sealing frame 80 is used to prevent the cover plate 30 from opening outward and lock the cover plate 30. The sealing frame 80 includes a sealing ring 810 corresponding to each working unit and a plurality of vertical rods 820 connected between the sealing rings 810. The sealing ring 810 is located at the lower end of the working unit and can move up to the sealing space to abut against the lower end of the handle 310. The vertical rod 820 corresponds to each column 120 and is assembled on the column 120 by moving up and down through the collar 830. The collar 830 is located above the nut 150, and the nut 150 is used to limit the downward movement of the sealing frame 80 to adjust the vertical position of the sealing frame 80.

[0045] The working process of the embodiment of the rapid sampling device for heavy metal detection in water quality of the present invention comprises the following steps:

[0046] The first step is installation. Connect the sampling bag 90 to the corresponding sampling tube 40 through the quick-release connector 410, close the two clamps 50, and the spring 610 applies elastic force to the pressure plate 60 so that the pressure plate 60 squeezes the sampling bag 90, thereby exhausting the air in the sampling bag 90, close the cover 30, and the locking plate 320 abuts against the outer wall of the adjacent clamp 50 to keep the two clamps 50 tightly closed. Adjust the vertical position of the sealing frame 80 through the nut 150, so that the sealing ring 810 moves up to the sealed space and abuts against the lower end of the handle 310 to prevent the cover 30 from opening outward, and lock the cover 30.

[0047] The second step is sampling. The sampling device is connected to the cable of the winch through the hanging buckle 110. The winch puts the sampling device into the seawater. The linear drive member 430 pulls the piston 420 to move into the cylinder 10. Negative pressure is generated inside the sampling cylinder 40 to suck the external seawater into the sampling cylinder 40 and introduce it into the sampling bag 90 through the quick-release connector 410. The sampling bag 90 gradually expands and squeezes the pressure plate 60. The two pressure plates 60 move outward, so that the excess gas in the two clamps 50 enters the airbag 720, and at the same time drives the buckle 640 to move, so that the buckle 640 and the lock head 711 are engaged and matched to lock the position of the pressure plate 60. The pressure plate 60 and the accommodating chamber 530 support and limit the sampling bag 90. After the sampling is completed, the linear drive member 430 pushes the piston 420 to move outside the cylinder 10, and the piston 420 pushes out the seawater in the sampling cylinder 40 that has not been collected in the sampling bag 90, and seals the sampling cylinder 40.

[0048] The third step is disassembly. The sampling device is pulled out of the seawater by a winch. The vertical position of the sealing frame 80 is adjusted by the nut 150, so that the sealing ring 810 moves down and disengages from the cover plate 30, and the cover plate 30 is unlocked. The cover plate 30 is opened, and the two clamping plates 50 are opened. The unlocking block 210 pushes the lever 710, and the lever 710 drives the lock head 711 to enter a vertical state. The width direction of the lock head 711 corresponds to the open end of the buckle groove. The buckle 640 is disengaged from the lock head 711 under the action of the spring 610, the pressure plate 60 is reset, and the airbag 720 is depressurized, and the sampling bag 90 can be taken out.

[0049] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0050] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0051] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A rapid sampling device for heavy metal detection in water, comprising a cylinder, characterized in that: The outer peripheral side of the cylinder body is provided with a plurality of working chambers, each of which is provided with a sampling cylinder and two clamping plates, each of which is provided with a cover plate on the side wall close to the outside of the cylinder body, a quick-release joint for installing a sampling bag is provided at the lower end of the sampling cylinder, and a piston is installed in the sampling cylinder for movement along the length direction of the sampling cylinder; The two clamps are rotatably installed in the working chamber on one side close to the cylinder body, so that the two clamps can be opened and closed. The inner side of the cover plate is provided with a locking plate for tightly closing the two clamps. The opposite sides of the two clamps are provided with a receiving chamber, so as to fix the sampling bag between the two clamps. A pressing plate is provided in the receiving chamber, and a spring is provided between the pressing plate and the clamp to apply elastic force to the pressing plate so that the pressing plate squeezes the sampling bag, thereby exhausting the air in the sampling bag. The side wall of the receiving chamber away from the pressing plate is provided with an air hole connected to the air bag, and the air bag is provided with a vent pipe connected to the sampling barrel. The splint also has a ventilation chamber connected with the accommodating chamber, the ventilation chamber is located on the side of the accommodating chamber away from the sampling bag, a sleeve and a ventilation seat are arranged on the side wall of the ventilation chamber facing the sampling bag, a guide rod slidingly matched with the sleeve is arranged on the pressing plate, an air hole is opened on the ventilation seat, a spring is installed in the ventilation seat, an air box is arranged on the splint, which is located on the side of the ventilation seat away from the pressing plate and connected with the air hole, and the air bag is installed on the air box and connected with the air box; A lever is rotatably mounted on the air box, a lock is arranged at the end of the lever extending into the air box, a torsion spring is arranged between the lever and the air box, a through hole connected to the air box is opened on the vent seat, a through rod slidingly matched with the through hole is arranged on the pressure plate, and a buckle capable of engaging with the lock to lock the pressure plate is arranged at the end of the through rod extending into the air box; A rotating shaft is respectively arranged on one side of the two clamping plates close to the cylinder body, and the rotating shaft is rotatably installed in the working chamber. A gear is arranged on the rotating shaft, and the gears arranged on the two rotating shafts are meshed with each other. A side of the cover plate close to one of the clamping plates is hinged to the cylinder body, and a locking plate is arranged on a side of the cover plate close to the other clamping plate. After the cover plate is closed, the locking plate can abut against the outer wall of the clamping plate to limit the rotation of the clamping plate. A plurality of working chambers form working units along the circumference of the cylinder, and a plurality of working units are provided and distributed on the cylinder along the height direction of the cylinder to collect water samples at different depths. The rapid sampling device for heavy metal detection in water quality also includes a sealing frame mounted on the outer wall of the cylinder for upward and downward movement, and the sealing frame is used to prevent the cover plate from opening outwards; A handle is provided on the outer side surface of each cover plate, and a sealed space is provided between the lower end of the handle and the lower end of the cover plate. The sealing frame includes a sealing ring corresponding to each working unit and a plurality of vertical rods connected between the sealing rings. The sealing ring is located at the lower end of the working unit and can be moved up to the sealed space to abut against the lower end of the handle. A column corresponding to each vertical rod is provided at the upper end of the cylinder body. The vertical rod is assembled on the column by moving up and down through a collar. Threads are distributed on the outer circumference of at least two columns and nuts located below the collar are installed to limit the downward movement of the sealing frame.

2. A rapid sampling device for heavy metal detection in water according to claim 1, characterized in that: The lock head is in the shape of a long strip, and the buckle includes a buckle slot and two buckle claws. The open end of the buckle slot faces the lock head, and the two buckle claws are respectively arranged on both sides of the open end of the buckle slot and extend inward. After the lock head is inserted into the buckle slot, the two buckle claws respectively abut against the upper and lower ends of the lock head to prevent the lock head from escaping from the buckle slot.

3. A rapid sampling device for heavy metal detection in water according to claim 2, characterized in that: The side wall of the working chamber is provided with an unlocking block which can push the lever so that the lever drives the lock head to rotate. The lock head can be rotated to correspond to the open end of the buckle groove in the width direction of the lock head so that the lock head is disengaged from the buckle groove.

4. A rapid sampling device for heavy metal detection in water according to claim 1, characterized in that: The lower end of the sampling tube is provided with two quick-release joints for installing two sampling bags, and the two clamping plates are respectively provided with two accommodating chambers.

5. A rapid sampling device for heavy metal detection in water according to claim 1, characterized in that: The center of the cylinder is provided with an installation chamber, in which a linear drive component is installed, and the output end of the linear drive component is connected to a piston to drive the piston to move along the length direction of the sampling cylinder.

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