CN115200940B - Water quality monitoring layered sampling device - Google Patents
Water quality monitoring layered sampling device Download PDFInfo
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- CN115200940B CN115200940B CN202210824761.3A CN202210824761A CN115200940B CN 115200940 B CN115200940 B CN 115200940B CN 202210824761 A CN202210824761 A CN 202210824761A CN 115200940 B CN115200940 B CN 115200940B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/10—Devices for withdrawing samples in the liquid or fluent state
- G01N1/14—Suction devices, e.g. pumps; Ejector devices
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/10—Devices for withdrawing samples in the liquid or fluent state
- G01N1/16—Devices for withdrawing samples in the liquid or fluent state with provision for intake at several levels
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/20—Controlling water pollution; Waste water treatment
Abstract
The invention relates to a water quality monitoring layered sampling device, which comprises a device shell, a sample storage container, a spring pushing device and a sampling depth detection control device, wherein the spring pushing device drives the sample storage container to push upwards, the sample storage container is provided with a water inlet, an air outlet, a sampling piston device and an elastic positioning device, when the sample storage container is positioned at a sampling position, the water inlet is aligned with the sampling opening on the device shell, the device shell is provided with a preparation position positioning notch and a sampling position positioning notch which are used for respectively matching with a positioning rod of the elastic positioning device and a piston rod of the sampling piston device to position the sample storage container at a sampling preparation position and a sampling position, the sampling depth detection control device comprises a floater and a pull rope, the pull rope is fixed with control blocks corresponding to each sampling depth, and the control blocks push the positioning rod to retract to release the positioning. The beneficial effects are that: layered sampling is realized, and the sampled water is stored in a closed manner; the sampling depth is controlled by a pull rope under the floater, and the sampling depth is accurately controlled.
Description
Technical Field
The invention relates to the technical field of water quality sampling devices, in particular to a water quality monitoring layered sampling device.
Background
When water quality monitoring is carried out, water bodies with different depths are required to be sampled according to the water quality monitoring standard requirement.
The existing water quality layered sampling device is divided into an electronic control sampling device and a mechanical control sampling device, wherein the electronic control sampling device detects the depth reached by the sampling device through an electronic system, and opens a sampling inlet of the sampling device to collect a water sample after reaching a specified depth. The electronic control sampling device has the defect that electronic components have the risk of water leakage and damp in water. And the mechanical control sampling device detects the depth reached by the sampling device in a mechanical way, and opens a sampling inlet of the sampling device to collect the water sample after reaching the designated depth. Compared with an electronic control sampling device, the mechanical control sampling device does not need to consider the waterproof problem, but generally only can take one depth of water sample at a time, the mechanical control mode is adopted to realize that the water samples with a plurality of depths are simultaneously collected at one time, and the design difficulty is high.
The water quality monitoring layered sampling device disclosed in the Chinese patent document CN110907231A belongs to a mechanical control sampling device, can collect water samples with a plurality of depths by one-time sampling, and can timely seal a sample storage container after sampling.
The water quality monitoring stratified sampling device of this patent document has the disadvantages: the depth detection error is larger; the sampling depth can only be adjusted in a gradient way; after one depth sampling is finished, the device can continue to sample the next depth, but whether the sampling is finished at the depth is difficult to directly observe, and whether bubbles are continuously generated or not is judged according to experience or observation; the sample storage container can be filled with water samples by slowly rising the sample storage container, and the sampling speed is low.
Disclosure of Invention
The technical problems to be solved by the invention are as follows: provided is a water quality monitoring layered sampling device which can accurately perform water quality layered sampling at a plurality of set sampling depths.
The technical scheme adopted for solving the technical problems is as follows: the water quality monitoring layered sampling device comprises a device shell, a sample storage container in the device shell, at least one spring pushing device and a sampling depth detection control device, wherein the spring pushing device acts on the sample storage container to drive the sample storage container to push upwards in the device shell, the sample storage container is used for sequentially entering a sampling preparation position, a sampling position and a sample storage position, the sample storage containers are arranged in a vertically stacked mode, each sample storage container is provided with a water inlet, an air outlet, a sampling piston device and an elastic positioning device, the water inlet is in sealing fit with the inner wall of the device shell and is used for closing the water inlet, the sampling piston device is positioned in the sample storage container and performs water absorption sampling through elastic reset, the sampling piston device is provided with a piston rod which can extend out from the end part of the sample storage container, the piston rod and the water inlet are positioned at the same end of the sample storage container, the elastic positioning device comprises a positioning rod and a positioning spring for pushing the positioning rod to extend and reset, a sampling port is arranged on the device shell, a water inlet is positioned below the sampling port when the sample storage container is positioned at a sampling preparation position, the water inlet is aligned with the sampling port when the sample storage container is positioned at the sampling position, the water inlet is opened, the water inlet is positioned above the sampling port when the sample storage container is positioned at the sample storage position, a sampling position positioning notch and a preparation position positioning notch are arranged on the side surface of the device shell, the positioning rod extends from the preparation position positioning notch, the upper port of the preparation position positioning notch is closed and is used for being matched with the positioning rod to position the sample storage container at the sampling preparation position, a piston rod extends from the sampling position positioning notch, the upper port of the sampling position positioning notch is closed and is used for being matched with the piston rod to position the sample storage container at the sampling position, the sampling depth detection control device comprises a floater and a pull rope, one end of the pull rope is fixed on the floater, a control block corresponding to each sampling depth is fixed on the pull rope, a pull rope channel is arranged on the device shell, the pull rope penetrates through the pull rope channel to be fixed with the floater, the pull rope channel is overlapped with the positioning notch at the preparation position and is positioned at the outer side of the positioning notch at the preparation position, when the device shell descends along the pull rope and reaches a set sampling depth, the corresponding control block pushes the positioning rod to retract, the positioning of a sample storage container at the sampling preparation position is relieved, when the sample storage container finishes sampling, the piston rod retracts and is separated from the positioning notch at the sampling position, and the positioning of the sample storage container at the sampling position is relieved.
Further defined, the water inlet is located the one end of storing up appearance container, and gas vent and elastic positioning device are located the other end of storing up appearance container, and piston rod and water inlet are located the same end of storing up appearance container, and sampling position location notch and ready position location notch are located the opposite both sides of device shell respectively.
Further defined, the sampling piston device comprises a sampling piston and a piston return spring, the sampling piston is arranged in the sample storage container, the piston return spring drives the sampling piston to return, and the piston rod is arranged on the sampling piston.
In order to realize automatic continuous layered sampling, the exhaust port is further defined to be in sealing fit with the inner wall of the device shell, the device shell is provided with a gas collecting tube, when the sample storage container is in a sampling position, the exhaust port of the sample storage container is aligned with the inner port of the gas collecting tube and is used for exhausting the gas of the sample storage container through the gas collecting tube, the outer port of the gas collecting tube is provided with a back pressure valve, and back pressure is formed in the gas collecting tube when the gas collecting tube is exhausted through the back pressure valve; still include unreeling device, unreeling device installs on the device shell, the stay cord is released from unreeling device, connect the float, unreeling device has cylinder brake equipment, cylinder brake equipment includes the cylinder body, piston unit and brake reset spring in the cylinder body, the piston unit includes brake piston and brake piston rod on the brake piston, have the branch road pipeline on the gas collecting tube, the gas collecting tube passes through the work inner chamber air feed of branch road pipeline to the cylinder body for promote brake piston and remove, brake piston rod stretches out, locking unreeling device, brake reset spring drives piston unit and resets, unblock unreeling device.
Further limited, unreeling device installs the bottom at the device shell, including unreeling wheel and shaft, and the shaft is installed on the device shell, and unreeling wheel installs rotatory on the shaft, and cylinder brake equipment is integrated in the shaft to the shaft is the cylinder body, and unreeling wheel's inboard has a plurality of brake jacks, and brake jack evenly arranges along the circumference of the hole of unreeling wheel, and brake piston rod stretches out from the side of shaft, inserts brake jack, locks unreeling device.
Further defined, the piston unit has an overflow aperture communicating the working chamber of the cylinder with the external environment.
Further defined, the periphery of the inlet and outlet of the sample storage container has at least one ring of sealing rings secured to the sample storage container for sealing engagement between the inlet and outlet and the inner wall of the device housing.
In order to facilitate adjusting the position of the control block on the pull rope, further defined, the control block is fixed on the pull rope through a screw.
Further defined, the spring pushing means comprises a pushing spring located at the bottom of the device housing, the pushing spring acting on the lowermost reservoir.
The beneficial effects of the invention are as follows: layered sampling is realized, and the sampled water is stored in a closed manner and cannot be polluted; the sampling depth is controlled by a pull rope under the floater, and the sampling depth is accurately controlled; the sampling piston device is used for carrying out water absorption sampling, so that the sampling speed is high;
meanwhile, by locking the release of the pull rope during sampling, automatic continuous layered sampling is realized, and whether sampling is finished or not is not required to be judged manually.
Drawings
The invention is further described below with reference to the drawings and examples;
FIG. 1 is a schematic diagram of a water quality monitoring layered sampling device in a front view state structure at a sampling preparation position;
FIG. 2 is a schematic diagram of a water quality monitoring layered sampling device in a right-side view state structure at a sampling preparation position;
FIG. 3 is a cross-sectional view A-A of FIG. 2;
FIG. 4 is a right-side view state cooperation schematic diagram of the water quality monitoring layered sampling device in a sampling preparation position;
FIG. 5 is an enlarged view at B of FIG. 3;
FIG. 6 is an enlarged view at C of FIG. 3;
FIG. 7 is a front view in cross section of the water quality monitoring layered sampling device of the present invention in a sampling position;
FIG. 8 is an enlarged view of FIG. 7 at D;
FIG. 9 is a right-side view of the layered sampling device for water quality monitoring in the present invention;
FIG. 10 is a schematic diagram showing the left-view state cooperation of the water quality monitoring layered sampling device at the sampling position;
FIG. 11 is a front view cross section of the water quality monitoring layered sampling device of the present invention after one sampling is completed;
FIG. 12 is a schematic diagram showing the right-view state cooperation of the water quality monitoring layered sampling device after one-time sampling;
FIG. 13 is a schematic view of the control block of the present invention fastened to a pull cord with screws;
in the drawings, 1a device housing, 1-1 a sampling port, 1-2 a sampling position positioning notch, 1-3 a ready position positioning notch, 1-4 a pull cord channel, 2 a sample storage container, 2-1 a water inlet, 2-2 a gas outlet, 2-3 a sampling piston, 2-4 a piston return spring, 2-5 a piston rod, 2-6 a positioning rod, 2-7 a positioning spring, 3-1 a float, 3-2 a pull cord, 3-3 a control block, 4 a gas collecting tube, 5 a back pressure valve, 6-1 a brake return spring, 6-2 a brake piston, 6-3 a brake piston rod, 7 a bypass line, 8-1 a unreeling wheel, 8-2 a wheel axle, 8-3 a plug socket, 9 a sealing ring, 10-1 a push spring, 10-2 a push block, 11 a screw, 12 a lifting cord, 13 a first guide member, 14 a second guide member, 15 a third guide member, 16 a through hole, 17 an overflow hole, 18
Detailed Description
As shown in fig. 1 to 13, a water quality monitoring layered sampling device comprises a device housing 1, a sample storage container 2 in the device housing 1, a spring pushing device, a sampling depth detection control device and an unreeling device, wherein the number of the sample storage containers 2 is at least one, the spring pushing device acts on the sample storage container 2 to drive the sample storage container 2 to push upwards in the device housing 1, the sample storage container 2 is used for sequentially entering a sampling preparation position, a sampling position and a sample storage position, the sample storage containers 2 are arranged in a stacked manner, and the sample storage containers 2 are of an integral structure or a split structure. In the drawings of the present embodiment, there are three sample containers 2.
The spring pushing device comprises a pushing spring 10-1, wherein the pushing spring 10-1 is positioned at the bottom of the device shell 1, and the pushing spring 10-1 acts on the lowest sample storage container 2. When the sample storage container 2 is a cylindrical container, a pushing block 10-2 is further arranged between the pushing spring 10-1 and the lowest sample storage container 2, so that the pushing spring 10-1 is ensured to reliably push the sample storage container 2 upwards.
The sample storage container 2 is provided with a water inlet 2-1, an exhaust port 2-2, a sampling piston device and an elastic positioning device, wherein the water inlet 2-1 is positioned at one end of the sample storage container 2, the exhaust port 2-2 and the elastic positioning device are positioned at the other end of the sample storage container 2, and the water inlet 2-1 is in sealing fit with the inner wall of the device shell 1 and is used for closing the water inlet 2-1. The exhaust port 2-2 is in sealing fit with the inner wall of the device housing 1, the device housing 1 is provided with a gas collecting tube 4, when the sample storage container 2 is in a sampling position, the exhaust port 2-2 of the sample storage container 2 is aligned with the inner port of the gas collecting tube 4 and is used for exhausting the exhaust port 2-2 of the sample storage container 2 through the gas collecting tube 4, the outer port of the gas collecting tube 4 is provided with a back pressure valve 5, and back pressure is formed in the gas collecting tube 4 when the gas collecting tube 4 is exhausted through the back pressure valve 5.
The periphery of the water inlet 2-1 and the air outlet 2-2 of the sample storage container 2 is provided with at least one circle of sealing rings 9 fixed on the sample storage container 2, and the sealing rings are used for sealing and matching between the water inlet 2-1 and the air outlet 2-2 and the inner wall of the device shell 1. The sealing is realized through the sealing ring 9, so that the resistance of pushing the sample storage container 2 can be reduced while the sealing effect is ensured.
The sampling piston device comprises a sampling piston 2-3 and a piston return spring 2-4, the sampling piston 2-3 is arranged in a sample storage container 2, the piston return spring 2-4 drives the sampling piston 2-3 to return, a piston rod 2-5 which can extend out of the end part of the sample storage container 2 is arranged on the sampling piston 2-3, and the piston rod 2-5 and a water inlet 2-1 are positioned at the same end of the sample storage container 2.
The elastic positioning device comprises a positioning rod 2-6 and a positioning spring 2-7 for pushing the positioning rod 2-6 to extend out for resetting.
The device housing 1 is provided with a sampling port 1-1, when the sample storage container 2 is in a sampling preparation position, the water inlet 2-1 is in a closed state and is positioned below the sampling port 1-1, when the sample storage container 2 is in the sampling position, the water inlet 2-1 is aligned with the sampling port 1-1, the water inlet 2-1 is opened, when the sample storage container 2 is in the sample storage position, the water inlet 2-1 is in a closed state and is positioned above the sampling port 1-1, two opposite sides of the device housing 1 are respectively provided with a notch extending from bottom to top, namely a sampling position positioning notch 1-2 and a preparation position positioning notch 1-3, a positioning rod 2-6 extends from the preparation position positioning notch 1-3, an upper port of the preparation position positioning notch 1-3 is closed and is used for being matched with the positioning rod 2-6 to position the sample storage container 2 in the sampling preparation position, a piston rod 2-5 extends from the sampling position positioning notch 1-2, and an upper port of the sampling position positioning notch 1-2 is closed and is used for being matched with the piston rod 2-5 to position the sample storage container 2 in the sampling position.
The sampling depth detection control device comprises a floater 3-1 and a pull rope 3-2, one end of the pull rope 3-2 is fixed on the floater 3-1, a control block 3-3 corresponding to each sampling depth is fixed on the pull rope 3-2, a pull rope channel 1-4 is arranged on a device shell 1, the pull rope 3-2 passes through the pull rope channel 1-4 to be fixed with the floater 3-1, the pull rope channel 1-4 is overlapped with the preparation position locating notch 1-3 and is positioned outside the preparation position locating notch 1-3. As shown in fig. 13, the control block 3-3 is fixed to the pull cord 3-2 by a screw 11. When the device shell 1 descends along the pull rope 3-2 and reaches a set certain sampling depth, the corresponding control block 3-3 pushes the positioning rod 2-6 to retract to release the positioning of the sample storage container 2 at the sampling preparation position, and when the sample storage container 2 finishes sampling, the piston rod 2-5 retracts to be separated from the sampling position positioning notch 1-2 to release the positioning of the sample storage container 2 at the sampling position.
The unreeling device is arranged on a device shell 1, a pull rope 3-2 is released from the unreeling device and is connected with a floater 3-1, the unreeling device is provided with a cylinder brake device, as shown in figures 6 and 8, the cylinder brake device comprises a cylinder body, a piston unit in the cylinder body and a brake reset spring 6-1, the piston unit comprises a brake piston 6-2 and a brake piston rod 6-3 on the brake piston 6-2, a branch pipeline 7 is arranged on a gas collecting pipe 4, the gas collecting pipe 4 supplies gas to a working inner cavity of the cylinder body through the branch pipeline 7 and is used for pushing the brake piston 6-2 to move, the brake piston rod 6-3 stretches out, the unreeling device is locked, and the brake reset spring 6-1 drives the piston unit to reset to unlock the unreeling device.
Specifically, unreeling device installs the bottom at device shell 1, including unreeling wheel 8-1 and shaft 8-2, shaft 8-2 installs on device shell 1, unreeling wheel 8-1 installs and rotates on shaft 8-2, cylinder brake equipment integrates in shaft 8-2, regard shaft 8-2 as the cylinder body, unreel the inboard of wheel 8-1 has a plurality of brake jacks 8-3, brake jacks 8-3 evenly arrange along the circumference of the hole of unwrapping wheel, brake piston rod 6-3 stretches out from the side of shaft 8-2, insert brake jack 8-3, locking unreeling device.
In addition, in actual use, the water quality monitoring layered sampling device is lowered into the water body to be monitored through the lifting rope 12 tied at the top of the device shell 1. In order to ensure that the float 3-1 does not deviate at will and the control of the sampling depth is affected, a through hole is arranged in the middle of the float 3-1, and the float 3-1 is connected on the lifting rope 12 through the through hole. In order to ensure that the device housing 1 is submerged along the pull rope 3-2 in a vertical state as much as possible, the top of the device housing 1 is provided with a first guide part 13, the first guide part 13 is provided with a guide hole, the guide hole is positioned on the central axis of the device housing 1, and the pull rope 3-2 passes through the guide hole of the first guide part 13 to be connected with the floater 3-1. Accordingly, in order to ensure smooth movement of the draw string 3-2 between the unreeling device, the draw string channel 1-4 and the first guide member 13, other guide members including a second guide member 14 and a third guide member 15 are provided, and the second guide member 14 and the third guide member 15 also guide the draw string 3-2 through the guide holes. The device shell 1 is provided with a hole 16, so that water can enter the device shell 1, and the water quality monitoring layered sampling device can be smoothly sunk. The unreeling wheel 8-1 or the wheel axle 8-2 can be made of metal materials and used as a counterweight. The method for forming the sampling position locating notch 1-2, the preparation position locating notch 1-3 and the stay cord channel 1-4 comprises the following steps: firstly, a sampling position locating notch 1-2 and a preparation position locating notch 1-3 are formed on a device shell 1 in a slotting mode, then a cover plate 17 with a groove on the inner side is covered on one side of the preparation position locating notch 1-3 of the device shell 1, and the groove can form a stay cord channel 1-4, as shown in figures 3 and 5. In order to ensure that the positioning rod 2-6 reliably releases the positioning of the sample storage container 2 at the sampling preparation position when pushed and retracted by the control block 3-3, as shown in fig. 5, the positioning rod 2-6 is designed to be a round head or a conical head, the upper port of the preparation position positioning notch 1-3 is provided with a round head or a conical head matched with a straight slope or an arc slope, after the positioning rod 2-6 is retracted for a small section, the positioning rod 2-6 can be pushed to completely withdraw from the preparation position positioning notch 1-3 by the round head or the conical head of the positioning rod 2-6 and the slope of the upper port of the preparation position positioning notch 1-3 by virtue of the pushing force of the spring pushing device, and the positioning is released.
The working procedure of this embodiment is as follows:
as shown in fig. 1, 2, 3, 4, 5 and 6, the water quality monitoring layered sampling device is firstly lowered into a water body through a lifting rope 12, the first sample storage container 2 arranged at the uppermost is positioned at a sampling preparation position by a positioning rod 2-6 and an upper port of a preparation position positioning notch 1-3, a floater 3-1 floats on the water surface in the process of lowering the water quality monitoring layered sampling device, and a pull rope 3-2 is freely released from an unreeling device;
as shown in fig. 7, 8, 9 and 10, when the device housing 1 descends along the pull rope 3-2 and reaches a set first sampling depth, the corresponding control block 3-3 moves to the position of the positioning rod 2-6 of the first sample storage container 2, the positioning rod 2-6 is pushed to retract, the positioning of the first sample storage container 2 at the sampling preparation position is released, the first sample storage container 2 enters the sampling position and is positioned under the pushing action of the spring pushing device, the sample storage container 2 performs water absorption sampling from the water inlet 2-1 through the reset action of the sampling piston 2-3, during the water absorption sampling, the sampling piston 2-3 also pushes air in the sample storage container 2 to be discharged into the gas collecting tube 4 from the gas outlet 2-2, and back pressure is formed in the gas collecting tube 4 when the gas collecting tube 4 is discharged through the back pressure valve 5, the back pressure enables the discharged air to be supplied to the cylinder brake device through the branch pipeline 7, the unreeling device is locked, the pull rope 3-2 cannot be released from the unreeling device, and even if the water quality monitoring layering device is continuously lowered through the hanging rope 12, the water quality monitoring layering device is not pulled through the housing 1;
as shown in fig. 11 and 12, until the sampling piston 2-3 is reset to the initial state, the first sample storage container 2 finishes sampling, the piston rod 2-5 is retracted, the positioning notch 1-2 at the sampling position is separated, the positioning of the first sample storage container 2 at the sampling position is released, each sample storage container 2 moves upwards under the pushing action of the spring pushing device, the first sample storage container 2 enters the sample storage position, the second sample storage container 2 is positioned at the sampling preparation position, the gas collecting tube 4 and each gas outlet 2-2 are in a staggered state, the gas collecting tube 4 is out of pressure, the cylinder braking device of the unreeling device is reset, the unreeling device is unlocked, and the device shell 1 can descend along the pull rope 3-2 to continue sinking;
when the device shell 1 descends along the pull rope 3-2 and reaches a set second sampling depth, the corresponding control block 3-3 releases the positioning of the second sample storage container 2 at the sampling preparation position, the second sample storage container 2 enters the sampling position and is positioned, and the sample storage container 2 absorbs water for sampling;
after the second sample storage container 2 finishes sampling, the second sample storage container 2 enters a sample storage position, the third sample storage container 2 is positioned at a sampling preparation position, and the device shell 1 can descend along the pull rope 3-2 to continue sinking;
when the device shell 1 descends along the pull rope 3-2 and reaches a set third sampling depth, the corresponding control block 3-3 releases the positioning of the third sample storage container 2 at the sampling preparation position, the third sample storage container 2 enters the sampling position and is positioned, and the sample storage container 2 absorbs water for sampling;
after the third sample storage container 2 finishes sampling, the third sample storage container 2 enters the sample storage position to finish the whole layered sampling process.
In this embodiment 1, when the sample storage container 2 at the sampling position does not complete sampling, the water quality monitoring layered sampling device does not sink, so that it is not necessary to manually determine whether sampling is completed, and the lifting rope can be released continuously only after determining that current depth sampling is completed, and the lifting rope can be released completely once.
In the invention, the water inlet 2-1 and the air outlet 2-2 are in sealing fit with the inner wall of the device shell 1 through the sealing rubber strips attached to the inner wall of the device shell 1, the sealing rubber strips can seal the whole end face of the sample storage container 2 where the water inlet 2-1 and the air outlet 2-2 are positioned with the inner wall of the device shell 1, when the sample storage container 2 is square or each sample storage container 2 is of an integrated structure, the situation that even if the air outlet 2-2 is completely staggered with the inner end opening of the gas collecting tube 4, the gas collecting tube 4 cannot lose pressure exists, at the moment, the overflow hole 18 communicated with the working inner cavity of the cylinder body and the external environment can be arranged on the piston unit, overflow pressure relief is carried out when the sample storage container 2 is pushed away from the sampling position, and the unreeling device is unlocked.
Claims (7)
1. The utility model provides a water quality monitoring layering sampling device, includes device shell (1) and stores up appearance container (2) in device shell (1), characterized by: the device also comprises a spring pushing device and a sampling depth detection control device, the number of the sample storage containers (2) is at least one, the spring pushing device acts on the sample storage containers (2) to drive the sample storage containers (2) to push upwards in the device shell (1), the spring pushing device is used for enabling the sample storage containers (2) to sequentially enter a sampling preparation position, a sampling position and a sample storage position, the sample storage containers (2) are arranged in a stacked mode, the sample storage containers (2) are provided with a water inlet (2-1), an air outlet (2-2), a sampling piston device and an elastic positioning device, the water inlet (2-1) is in sealing fit with the inner wall of the device shell (1), the sampling piston device is positioned in the sample storage containers and used for conducting water absorption sampling through elastic reset, the sampling piston device is provided with a piston rod (2-5) which can extend out of the end portion of the sample storage containers (2), the elastic positioning device comprises a positioning rod (2-6) and a positioning spring (2-7) which pushes the positioning rod (2-6) to stretch out and reset, the device shell (1) is provided with a sampling port (1-1), the water inlet (2-1) is positioned in the position which is aligned with the water inlet (1-1) when the water inlet (2-1) is positioned in the sample storage container (1) at the position which is in the preparation position of the sample storage container (1) and is positioned in the sample storage container (1), the water inlet (2-1) is opened, when the sample storage container (2) is positioned at the sample storage position, the water inlet (2-1) is positioned above the sampling port (1-1), the side surface of the device shell (1) is provided with a sampling position positioning notch (1-2) and a preparation position positioning notch (1-3), a positioning rod (2-6) stretches out from the preparation position positioning notch (1-3), the upper port of the preparation position positioning notch (1-3) is closed and is used for being matched with the positioning rod (2-6) to position the sample storage container (2) at the sampling preparation position, a piston rod (2-5) stretches out from the sampling position positioning notch (1-2), the upper port of the sampling position positioning notch (1-2) is closed and is used for being matched with the piston rod (2-5) to position the sample storage container (2) at the sampling position, the sampling depth detection control device comprises a floater (3-1) and a pull rope (3-2), one end of the pull rope (3-2) is fixed on the floater (3-1), a control block (3-3) corresponding to each sampling depth is fixed on the shell (1-3) and the pull rope (3-2) is provided with a channel (4) and the pull rope (1-4) penetrates through the channel (1-4), the stay cord channel (1-4) is overlapped with the prepared position locating notch (1-3) and is positioned at the outer side of the prepared position locating notch (1-3), when the device shell (1) descends along the stay cord (3-2) and reaches a set certain sampling depth, the corresponding control block (3-3) pushes the locating rod (2-6) to retract, the sample storage container (2) at the prepared position is relieved from being positioned, when the sample storage container (2) finishes sampling, the piston rod (2-5) retracts and is separated from the sampling position locating notch (1-2), and the sample storage container (2) at the sampling position is relieved from being positioned;
the sampling device is characterized in that the water inlet (2-1) is arranged at one end of the sample storage container (2), the air outlet (2-2) and the elastic positioning device are arranged at the other end of the sample storage container (2), the piston rod (2-5) and the water inlet (2-1) are arranged at the same end of the sample storage container (2), and the sampling position positioning notch (1-2) and the preparation position positioning notch (1-3) are respectively arranged at two opposite sides of the device shell (1);
the sampling piston device comprises a sampling piston (2-3) and a piston return spring (2-4), wherein the sampling piston (2-3) is arranged in a sample storage container (2), the piston return spring (2-4) drives the sampling piston (2-3) to return, and a piston rod (2-5) is arranged on the sampling piston (2-3);
the gas exhaust port (2-2) is in sealing fit with the inner wall of the device shell (1), the device shell (1) is provided with a gas collecting tube (4), when the sample storage container (2) is positioned at a sampling position, the gas exhaust port (2-2) of the sample storage container (2) is aligned with the inner port of the gas collecting tube (4) and is used for enabling the gas exhaust port (2-2) of the sample storage container (2) to exhaust through the gas collecting tube (4), the outer port of the gas collecting tube (4) is provided with a back pressure valve (5), and back pressure is formed in the gas collecting tube (4) when the gas collecting tube (4) is exhausted through the back pressure valve (5).
2. The water quality monitoring layered sampling device according to claim 1, wherein: the automatic unreeling device is mounted on a device shell (1), a pull rope (3-2) is released from the unreeling device and is connected with a floater (3-1), the unreeling device is provided with a cylinder braking device, the cylinder braking device comprises a cylinder body, a piston unit in the cylinder body and a braking reset spring (6-1), the piston unit comprises a braking piston (6-2) and a braking piston rod (6-3) on the braking piston (6-2), a gas collecting tube (4) is provided with a branch pipeline (7), the gas collecting tube (4) supplies gas to a working inner cavity of the cylinder body through the branch pipeline (7) and is used for pushing the braking piston (6-2) to move, the braking piston rod (6-3) stretches out to lock the unreeling device, and the braking reset spring (6-1) drives the piston unit to reset to unlock the unreeling device.
3. The water quality monitoring layered sampling device according to claim 2, wherein: unreeling device install the bottom at device shell (1), including unreeling wheel (8-1) and shaft (8-2), shaft (8-2) are installed on device shell (1), unreel wheel (8-1) are installed and are rotated on shaft (8-2), cylinder brake equipment is integrated in shaft (8-2), use shaft (8-2) as the cylinder body, unreel wheel (8-1) inboard has a plurality of brake jacks (8-3), brake jacks (8-3) evenly arrange along the circumference of the hole of unreeling wheel, brake piston rod (6-3) stretch out from the side of hub (8-2), insert brake jack (8-3), lock unreeling device.
4. The water quality monitoring layered sampling device according to claim 2, wherein: the piston unit is provided with an overflow hole (18) communicated with the working inner cavity of the cylinder body and the external environment.
5. The water quality monitoring layered sampling device according to claim 1, wherein: the periphery of the water inlet (2-1) and the air outlet (2-2) of the sample storage container (2) is provided with at least one circle of sealing ring (9) fixed on the sample storage container (2) and is used for sealing and matching between the water inlet (2-1) and the air outlet (2-2) and the inner wall of the device shell (1).
6. The water quality monitoring layered sampling device according to claim 1, wherein: the control block (3-3) is fixed on the pull rope (3-2) through a screw (11).
7. The water quality monitoring layered sampling device according to claim 1, wherein: the spring propelling device comprises a propelling spring (10-1), wherein the propelling spring (10-1) is positioned at the bottom of the device shell (1), and the propelling spring (10-1) acts on the lowest sample storage container (2).
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| CN116242667B (en) * | 2023-05-12 | 2023-07-21 | 北京沃太斯环保科技发展有限公司 | Underground water layered sampling and layered repairing device |
| CN117664665B (en) * | 2024-02-01 | 2024-04-12 | 绵阳师范学院 | Carbon dioxide detection device based on thermal infrared |
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