CN112033755A - Layered water collection and filtration integrated device and water collection method - Google Patents

Abstract

This invention relates to a stratified water sampling and filtration integrated device, comprising a floating mechanism. A retractable mounting rod is installed on the lower surface of a circular balance plate of the floating mechanism, and a movable water inlet head is mounted on the retractable mounting rod. A sampling mechanism is provided on the circular balance plate, comprising multiple units, each unit being evenly arranged along the inner circumference of a circular frame. Each unit includes a tank, a piston, and a lead screw. A gear is welded to the top of the lead screw extending above the tank. The bottom of the tank is connected to the upper part of the movable water inlet head via a threaded hose. A rotating shaft for driving gears is hinged and fixed on the circular frame, and a motor is connected to the top of the rotating shaft. The driving gears mesh with the gears of each unit. This invention also includes a water sampling method, which is simple to operate, can sample water at different depths, and can obtain multiple samples at once, improving water sampling efficiency. Furthermore, the filtration mechanism greatly simplifies the experimental steps.

Description

A layered water collection and filtration integrated device and water collection method

technical field

The invention belongs to the technical field of water collection, and relates to an integrated water collection and filtration device, in particular to a layered water collection and filtration integrated device and a water collection method.

Background technique

"Black and white bottle method" is a commonly used technical method in ecology. It is generally used to determine the primary production of aquatic ecosystem producers, that is, the amount of solar energy fixed by photosynthesis of green plants in the ecosystem, or the amount of organic matter produced. , the amount of oxygen produced, and the first step of the "black and white bottle method" is to collect water, collect the water source, and then filter it. Because the collected water quality is mainly from rivers and lakes, the water quality contains a large number of particles of different sizes and impurities, and the use of ordinary collectors requires matching biological nets with different apertures for filtration and filling before each transfer and filling, so that The increase of experimental steps greatly reduces the efficiency of subsequent experiments. Therefore, it is urgent to realize filtering while stratified sampling.

The following patent documents related to the present application were found by searching, and the specific contents are as follows:

1. The filter head of the self-cleaning online water collection filter (CN202052404U), the filter head is composed of a disc base, a support frame, a cleaning pipe bracket and a cleaning tube. The support frame is erected on the disc base, and the cleaning tube bracket base and the The upper part of the support frame is fixedly connected, and the end face of the head of the cleaning tube bracket is set in a semi-circular groove shape, which is connected with the cleaning tube. The filter glass tube is provided with a filter glass tube protective cover, and the water inlet pipe and the water outlet pipe are respectively provided with a water inlet pipe protective cover and a water outlet pipe protective cover. The filter head cleaning tube of this structure is firmly combined with the cleaning tube support and is durable; the cleaning tube is flushed by ultrasonic waves and a backwash pump, and can be self-cleaning online; the filter head has high safety.

2. The water collector (CN208155643U) is provided with a drain joint. A drainage hole is arranged on the barrel wall of the lower part of the barrel of the water extractor, and a blocking structure is arranged inside the barrel. The blocking structure includes a first base, a return spring and a rubber plug, and the first base faces the drainage hole. One side of the rubber plug is provided with a mounting hole for embedding the reset spring. One side of the rubber plug is a cylindrical structure, which is resisted by the reset spring. Drainage hole; the drainage joint includes a section of hollow pipe, the front end of the hollow pipe is closed, the rear end is open, a notch groove is arranged near the front end, and an annular flange is arranged behind the notch groove; the lower barrel wall of the water collector A second base is arranged on the outer side of the tube, and a limit hole for inserting the hollow tube is arranged on the second base. When the water sampling device of the present invention is staked out in the later stage, the drainage joint can be inserted, the operation is convenient, the structure design is reasonable, the realization is easy, and the utility model is suitable for popularization and use.

3. A layered water sampler (CN110595840A) for the detection of water body samples for river treatment, including a depth measurement device, a sampling device and five water storage devices. A water storage device is installed on the middle and lower ends of the depth measuring device by means of sliding fit, and the water storage devices are evenly arranged at the middle and lower ends of the depth measuring device from top to bottom. The present invention provides a layered water sampler for the detection of water body samples for river treatment, which can solve the problem that most of the existing water samplers can only take one water sample at a time, and when multiple water samples of different depths need to be taken, multiple The sampling efficiency of the water body is low, and the water samples in the traditional water collector or the existing layered water collector may be different from different water samples during the process of the water collector rising from the water layer to the water surface. The water body of the layer is exchanged, and the water collector cannot sample the water body of a specific depth.

Through the comparison of technical features, the above-mentioned published patent documents are different from the technical structure of the present invention, which will not affect the inventiveness and novelty of the application of the present invention.

SUMMARY OF THE INVENTION

The purpose of the present invention is to overcome the deficiencies of the prior art, and to provide an integrated device for layered water collection and filtration, which has novel structure, diverse functions, and simple operation. It can sample water bodies of different depths, and can obtain multiple Samples, improve the efficiency of water sampling, and at the same time, by setting up a filter mechanism, the experimental steps are greatly simplified.

The present invention solves its technical problem by adopting the following technical solutions to realize:

An integrated device for layered water collection and filtration, comprising a floating mechanism, a sampling mechanism, a movable water inlet, a threaded hose and a liftable and retractable installation rod, the floating mechanism includes a buoyancy ball and a circular balance plate, and the buoyancy ball is A plurality of them are evenly spaced along the circumference of the circular balance plate. A retractable mounting rod with scales is installed on the lower surface of the circular balance plate coaxially, and the retractable mounting rod is detachable. A movable water inlet head is installed; a circular frame is also coaxially installed on the circular balance plate, a sampling mechanism is arranged on the circular balance plate in the circular frame, and the sampling mechanism includes a plurality of units, each of which is The units are evenly arranged along the inner circumference of the circular frame. Each unit includes a tank body, a piston and a screw rod. A piston is slidably installed inside the tank body. The top surface of the piston is rotatably connected to the bottom end of the screw rod. The top of the screw rod protrudes from the top of the tank body and is welded with a gear. The top surface of the tank body is integrally provided with a vent hole, and the bottom end of the tank body is respectively provided with a water suction port and a water outlet with a valve, and the water suction port is also connected. A threaded hose is installed, and the other end of the threaded hose is communicated with the upper part of the movable water inlet; the circular frame and the center of the circular balance plate are coaxially hinged with a rotating shaft, and the rotating shaft is coaxially fixed with Drive gear, the top of the rotating shaft protrudes from the upper surface of the circular frame and is connected with a motor, the motor is fixedly installed on the circular frame, the drive gear is meshed with the gear of each unit, the motor drives the drive gear and meshes with it The connected gear rotates and the piston moves to achieve simultaneous water extraction.

Moreover, the sampling mechanism further includes a filter mechanism, the filter mechanism includes a filter connection neck and a water sample temporary storage tank, a water sample temporary storage tank is coaxially installed at the lower part of the filter connection neck, and a water sample temporary storage tank is installed at the top of the water sample temporary storage tank. A water outlet pipe with a valve is provided, and a sealing ring is also arranged in the water outlet pipe of the water sample temporary storage tank.

Moreover, the filter connection neck includes a filter cartridge, and a number of partitions are arranged in the filter cartridge, and the several partitions are distributed at equal intervals from top to bottom along the axis of the filter cartridge, and the partitions divide the filter cartridge into multi-layer filter cavities. A filter membrane frame is movably installed on the partition, and a conical filter membrane support net is coaxially installed on the filter membrane frame. Adjacent filter cavities are communicated through through holes; the side walls of the filter cartridges corresponding to each layer of filter chambers are provided with membrane loading ports, the filter membrane frame is provided with a filter cartridge cover, and the filter cartridge cover corresponds to the membrane loading ports and is integrally formed On the filter membrane frame, the partition plate is provided with a semicircular guide rail, which takes the axis of the partition plate as the center of the circle and extends from the left end of the membrane loading port to the right end. The bottom of the right end of the filter cartridge cover is provided with a sliding connection with the semicircular guide rail guide post.

Moreover, a lead weight is also provided on the bottom end of the liftable and retractable installation rod through a hanging rope.

Moreover, the circular balance plate is also integrally provided with a connection through hole.

Moreover, the upper surface of the circular frame is also provided with a handle.

Moreover, foldable support legs are hinged around the lower surface of the circular balance board.

Moreover, a cassette into which a label card can be inserted is provided on the side wall of the tank body of each unit of the collection mechanism.

Moreover, the edge of the filter cartridge cover is provided with a rubber sealing strip, the filter membrane frame is a ring, the outer diameter of the filter membrane frame corresponds to the inner diameter of the filter cartridge, and the inner diameter of the filter membrane frame corresponds to the through hole diameter of the partition plate.

A layered water collection and filtration integrated water collection method, comprising the following steps:

S1. Adjust the water sampling depth: According to the actual need to collect the data of the depth of the water body, the number of units of the sampling mechanism and the number of active water inlets are determined, and then the retractable installation rod is elongated, and the active water inlets are fixed by manual rotation. According to the scale provided on the surface of the retractable installation rod, the position of the movable water inlet can be adjusted. After the position of the movable water inlet is determined, manually tighten the fixed movable water inlet to lock and fix the movable water inlet. ;At the same time, the two ends of the threaded hose are respectively connected to the suction port of the tank body of the movable water inlet and the water collection mechanism;

S2. Preparing for collection: transfer the adjusted device to the pond to be collected, hang the lead sinker on the bottom end of the retractable installation rod through a lanyard, open the valve on the suction port of the tank of the water collection mechanism, and connect the device as a whole. put into the pond;

S3. Water sample collection: start the motor, the motor drives the drive gear and the gear meshed with it to rotate clockwise, the piston moves up to the top of the tank, the motor stops rotating, and the tank is filled with water.

S4. Water sample placement: After the water collection is completed, manually take the device out of the pond, then close the valve on the suction port of the tank body of the water collection mechanism, transfer the device to the laboratory, and remove the movable water inlet and threaded hose , fold up and retract the installation rod, open the support legs, and place the entire device horizontally on the test bench.

S5. Water sample filtration: open the valve on the water outlet of the tank body of the water collection mechanism, and place filter membranes with different apertures in the filter connection neck of the filter mechanism according to actual needs, start the motor, and the motor drives the drive gear and meshes with it. The gear rotates counterclockwise, so that the piston moves down, so that the water sample is discharged from the tank into the filter connection neck, and filtered through the filter membrane into the water sample temporary storage tank;

S6. Water sample transfer: When the filtered water sample needs to be used, according to actual needs, select the water depth and filtration effect corresponding to the water sample to be transferred, and then connect the collection bottle to the bottom of the water sample temporary storage tank through the connecting pipe. Connect the outlet pipe, and then open the valve on it.

The advantages and positive effects of the present invention are:

1. The integrated device for stratified water collection and filtration provided by the present invention uses buoyancy balls to float the device on the water surface, and is adapted to the requirements of accurate stratified water collection when the water level changes greatly or when the waves are too large;

2. The layered water sampling and filtration integrated device provided by the present invention samples water bodies of different depths through a plurality of movable water inlet heads, and can obtain multiple samples at one time, which improves the water sampling efficiency. The scale provided on the surface adjusts the different heights of the active water inlet, so as to sample the water body at a specific distance from the water surface;

3. The layered water collection and filtration integrated device provided by the present invention reduces the experimental steps by setting the filter mechanism, and because of the design of the conical filter membrane support net, water also passes through the periphery of the filter membrane covering it, It greatly improves the use efficiency of the filter membrane, makes the filtration of water samples more accurate, and greatly improves the use rate of the filter membrane.

Description of drawings

Fig. 1 is the structural representation of the present invention;

Fig. 2 is an exploded view of the present invention;

3 is a perspective view of the present invention;

Fig. 4 is the perspective view of the present invention looking down;

Fig. 5 is the water sample filtration transfer state diagram of the present invention;

6 is a schematic structural diagram of the closed state of the filter cartridge cover of the filter connecting neck of the present invention;

Fig. 7 is the structural representation of the filter cartridge of the present invention;

8 is a schematic structural diagram of the filter cartridge cover of the filter connecting neck of the present invention in an open state;

Fig. 9 is the structural representation that is provided with the filter membrane state on the filter membrane frame of Fig. 8;

Figure 10 is a schematic diagram of the structure of the filter membrane holder of the present invention.

Detailed ways

The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. The following embodiments are only descriptive, not restrictive, and cannot limit the protection scope of the present invention.

An integrated device for layered water collection and filtration, including a floating mechanism, a sampling mechanism, a movable water inlet 14, a threaded hose 12 and a retractable installation rod 13, the floating mechanism includes a buoyancy ball 11 and a circular balance plate 10, There are a plurality of the buoyancy balls, and they are evenly spaced along the circumference of the circular balance plate. The function of the buoyancy balls is to float the present invention on the water surface. A retractable installation rod is coaxially installed on the lower surface. The structure of the retractable installation rod is the structure of the existing telescopic teaching rod. The retractable installation rod is also provided with a scale line. A movable water inlet head is detachably installed on the installation rod, and the lower surface of the movable water inlet head is evenly spaced with water inlet holes to form a mesh structure, which can preliminarily filter large impurities in the water and prevent them from entering the sampling mechanism. blocked. A water outlet is also formed on the upper surface of the movable water inlet head;

A circular frame 9 is also coaxially mounted on the circular balance plate, and a sampling mechanism is arranged on the circular balance plate in the circular frame. The sampling mechanism includes a plurality of units, and each unit is along the circular The inner circumference of the frame is evenly arranged, and each unit includes a tank body 7, a piston 6 and a screw rod 5. There are scale lines on the side wall of the tank body, and a piston is slidably installed inside the tank body. The bottom end of the screw rod is rotatably connected, and the top end of the screw rod protrudes above the tank body with a gear 23 welded. The water suction port 16 and the water outlet 20 are provided with valves at the water suction port and the water outlet, and a threaded hose is also connected and installed at the water suction port, and the other end of the threaded hose is connected with the water outlet of the movable water inlet head. A rotating shaft 3 is coaxially hinged at the center of the circular frame and the circular balance plate, and a driving gear 22 is fixed on the rotating shaft coaxially. 2. The motor is fixedly installed on the circular frame, and the drive gear is meshed with the gear of each unit. The motor drives the drive gear and the gear meshed with it to rotate, and the piston moves, so that a negative pressure is formed in the tank so that the The water is sucked into the corresponding tank body; a filter mechanism is also installed on the lower surface of the tank body corresponding to the position of the water outlet.

The sampling mechanism further includes a filtering mechanism, the filtering mechanism includes a filtering connection neck 8 and a water sample temporary storage tank 18, a water sample temporary storage tank is coaxially installed at the lower part of the filtering connection neck, and the top of the water sample temporary storage tank is installed. A water outlet pipe 17 with a valve is provided, and a sealing ring is also arranged in the water outlet pipe of the water sample temporary storage tank; the filter connection neck includes a filter cartridge 8-1 and a filter membrane, and the middle of the filter cartridge is sleeved with a The filter membrane frame 19, the filter membrane is built into the filter cartridge and supported by the filter membrane frame; the filter membrane is a glass fiber filter membrane, and a number of partitions 8-2 are arranged along the inner edge of the filter cartridge, and the present invention uses two , The two partitions are equally spaced from top to bottom along the axis of the filter cartridge. The partition divides the filter cartridge into two-layer filter chambers, and the filter membrane frame is movably installed on the partition; Two adjacent filter cavities are communicated through through holes; a filter membrane support net 8-9 is coaxially installed on the filter membrane frame, the filter membrane support net is conical, and the filter membrane 8-6 is arranged on the filter membrane The support net prevents the surrounding filter membrane from passing through without water, which greatly improves the use efficiency of the filter membrane. There are membrane loading ports 8-4 on the side wall of the filter cartridge corresponding to each filter chamber, and the filter membrane passes through the membrane loading port. It can be loaded into each layer of filter cavity, the filter membrane frame is provided with a filter cartridge cover 8-3, the filter cartridge cover corresponds to the membrane loading port and is integrally formed on the filter membrane frame, the filter cartridge cover and the filter membrane frame Rotating together, the partition plate is provided with semicircular guide rails 8-5. The semicircular guide rail takes the axis of the partition plate as the center of the circle and extends from the left end of the membrane loading port to the right end. The bottom of the right end of the filter cartridge cover is provided with a guide rail that is slidably connected to the semicircular guide rail. Columns 8-8, so that the rotary opening and closing of the filter cartridge cover is smoother, and the range of its opening and closing is limited to facilitate the loading and unloading of the filter membrane.

The edge of the filter cartridge cover is provided with rubber sealing strips 8-7, the filter membrane frame is a ring, the outer diameter of the filter membrane frame corresponds to the inner diameter of the filter cartridge, and the inner diameter of the filter membrane frame corresponds to the diameter of the through hole of the partition plate. .

In the specific implementation of the present invention, in order to make the circular balance plate float more stably and horizontally on the water surface, a lead weight 15 is also provided on the bottom end of the liftable and retractable installation rod through a hanging rope.

In the specific implementation of the present invention, in order to facilitate better connection between the threaded hose and the movable water inlet, the circular balance plate is also provided with a connection through hole.

In the specific implementation of the present invention, in order to facilitate the carrying of the device, a handle 1 is also provided on the upper surface of the frame.

In the specific implementation of the present invention, in order to facilitate the filtration and transfer of the collected water to different degrees, foldable support legs 21 are also hinged around the lower surface of the circular balance plate. When the water sample needs to be transferred to the collection bottle 24 When it is installed, first remove the movable water inlet from the retractable installation rod, then retract the retractable installation rod, open the support legs, the whole device can be horizontally supported on the table, and then open the bottom of the water sample temporary storage tank The valve on the water outlet pipe can transfer the water to the collection bottle.

In the specific implementation of the present invention, in order to facilitate the collection of water samples more intuitively, a cassette into which a label card can be inserted is provided on the side wall of the tank body of each unit of the collection mechanism.

The present invention also provides a water collection method integrating layered water collection and filtration, comprising the following steps:

S1. Adjust the water sampling depth: According to the actual need to collect the data of the depth of the water body, the number of units of the sampling mechanism and the number of active water inlets are determined, and then the retractable installation rod is elongated, and the active water inlets are fixed by manual rotation. According to the scale provided on the surface of the retractable installation rod, the position of the movable water inlet can be adjusted. After the position of the movable water inlet is determined, manually tighten the fixed movable water inlet to lock and fix the movable water inlet. ;At the same time, the two ends of the threaded hose are respectively connected to the suction port of the tank body of the movable water inlet and the water collection mechanism;

S2. Preparing for collection: transfer the adjusted device to the pond to be collected, hang the lead sinker on the bottom end of the retractable installation rod through a lanyard, open the valve on the suction port of the tank of the water collection mechanism, and connect the device as a whole. put into the pond;

S3. Water sample collection: start the motor, the motor drives the drive gear and the gear meshed with it to rotate clockwise, the piston moves up to the top of the tank, the motor stops rotating, and the tank is filled with water.

S4. Water sample placement: After the water collection is completed, manually take the device out of the pond, then close the valve on the suction port of the tank body of the water collection mechanism, transfer the device to the laboratory, and remove the movable water inlet and threaded hose , fold up and retract the installation rod, open the support legs, and place the entire device horizontally on the test bench.

S5. Water sample filtration: open the valve on the water outlet of the tank body of the water collection mechanism, and place filter membranes with different apertures in the filter connection neck of the filter mechanism according to actual needs, start the motor, and the motor drives the drive gear and meshes with it. The gear rotates counterclockwise, so that the piston moves down, so that the water sample is discharged from the tank into the filter connection neck, and filtered through the filter membrane into the water sample temporary storage tank;

S6. Water sample transfer: When the filtered water sample needs to be used, according to actual needs, select the water depth and filtration effect corresponding to the water sample to be transferred, and then connect the collection bottle to the bottom of the water sample temporary storage tank through the connecting pipe. Connect the outlet pipe, and then open the valve on it.

Although the embodiments and drawings of the present invention are disclosed for illustrative purposes, those skilled in the art will appreciate that various substitutions, changes and modifications are possible without departing from the spirit and scope of the invention and the appended claims Therefore, the scope of the present invention is not limited to the contents disclosed in the embodiments and drawings.

Claims (10)

1. The utility model provides a water filtration integrative device is adopted in layering which characterized in that: the device comprises a floating mechanism, a sampling mechanism, a movable water inlet head, a threaded hose and a retractable mounting rod, wherein the floating mechanism comprises a plurality of buoyancy balls and a circular balance plate, the buoyancy balls are uniformly distributed at intervals along the circumferential direction of the circular balance plate, the lower surface of the circular balance plate is coaxially provided with a retractable mounting rod with scales on the surface, and the movable water inlet head is detachably mounted on the retractable mounting rod; the sampling device comprises a circular balance plate, a sampling mechanism, a plurality of units, a plurality of exhaust holes, a water suction port and a water outlet, wherein the circular balance plate is coaxially provided with a circular frame, the circular balance plate in the circular frame is provided with the sampling mechanism, each unit is uniformly distributed along the circumference of the inner circle of the circular frame, each unit comprises a tank body, a piston and a lead screw, the piston is slidably arranged in the tank body, the top surface of the piston is rotatably connected with the bottom end of the lead screw, the top end of the lead screw extends out of the upper part of the tank body and is welded with a gear, the top surface of the tank body is integrally provided with the exhaust holes, the bottom end of the tank body is respectively provided with the water suction port; the round frame is provided with a rotating shaft in coaxial hinge with the circle center of the round balancing plate, the rotating shaft is coaxially and fixedly provided with a driving gear, the top of the rotating shaft extends out of the upper surface of the round frame and is connected with a motor, the motor is fixedly arranged on the round frame, the driving gear is meshed with the gear of each unit, the motor drives the driving gear and the gear meshed with the driving gear to rotate, the piston moves, and water is collected simultaneously.

2. The layered water collection and filtration integrated device according to claim 1, wherein: sampling mechanism still includes filtering mechanism, filtering mechanism connects neck and water sample jar of keeping in including filtering, it has the water sample jar of keeping in to filter connection neck lower part coaxial arrangement, water sample tank deck portion of keeping in is provided with the outlet pipe that has the valve, still be provided with the sealing washer in the outlet pipe of water sample jar of keeping in.

3. The layered water collection and filtration integrated device according to claim 2, wherein: the filter connecting neck comprises a filter cartridge, a plurality of partition plates are arranged in the filter cartridge, the partition plates are distributed at equal intervals from top to bottom along the axis of the filter cartridge, the partition plates divide the filter cartridge into a plurality of layers of filter chambers, a filter membrane frame is movably arranged on the partition plates, a conical filter membrane supporting net is coaxially arranged on the filter membrane frame, a filter membrane is arranged on the filter membrane supporting net, a through hole is formed in the center of each partition plate, and two adjacent filter chambers are communicated through the through holes; all open on the cartridge filter lateral wall that every layer of filter chamber corresponds and have adorned the membrane mouth, be equipped with the filter cartridge cover on the filter membrane frame, the filter cartridge cover corresponds and integrated into one piece on the filter membrane frame with adorning the membrane mouth, the baffle is equipped with the semicircle guide rail, and the axle center that the semicircle guide rail used the baffle is the centre of a circle, follows the left end edge of adorning the membrane mouth and stretch to the right-hand member, and the right-hand member bottom of filter cartridge cover is equipped with the guide pillar with semicircle guide rail sliding connection.

4. The layered water collection and filtration integrated device according to claim 1, wherein: and a lead weight is further arranged at the bottom end of the telescopic mounting rod through a lifting rope.

5. The layered water collection and filtration integrated device according to claim 1, wherein: the circular balance plate is also integrally provided with a connecting penetrating port.

6. The layered water collection and filtration integrated device according to claim 1, wherein: the upper surface of the circular frame is also provided with a handle.

7. The layered water collection and filtration integrated device according to claim 1, wherein: foldable supporting legs are hinged to the periphery of the lower surface of the circular balancing plate.

8. The layered water collection and filtration integrated device according to claim 1, wherein: the side wall of the tank body of each unit of the collecting mechanism is provided with a card box which can be inserted with a label card.

9. The layered water collection and filtration integrated device according to claim 3, wherein: the edge of the filter cartridge cover is provided with a rubber sealing strip, the filter membrane frame is a circular ring, the outer diameter of the filter membrane frame corresponds to the inner diameter of the filter cartridge, and the inner diameter of the filter membrane frame corresponds to the diameter of the through hole of the partition plate.

10. A layered water collection and filtration integrated water collection method is characterized in that: the method comprises the following steps:

s1, adjusting water collection depth: the method comprises the following steps of determining the number of units of a sampling mechanism and the number of movable water inlet heads according to actual water depth data to be collected, then lengthening a retractable mounting rod, manually rotating and tightening the movable water inlet heads, adjusting the positions of the movable water inlet heads according to scales arranged on the surface of the retractable mounting rod, and manually tightening the tightened movable water inlet heads after the positions of the movable water inlet heads are determined, so that the movable water inlet heads are locked and fixed; simultaneously, two ends of the threaded hose are respectively and correspondingly connected with the movable water inlet head and a water suction port of the tank body of the water sampling mechanism;

s2, preliminary collection: transferring the adjusted device to the side of a pond to be collected, hanging a lead weight at the bottom end of a liftable mounting rod through a hanging rope, opening a valve on a water suction port of a tank body of a water collecting mechanism, and putting the whole device into the pond;

s3, water sample collection: the motor is started, the motor drives the driving gear and the gear meshed and connected with the driving gear to rotate clockwise, the piston moves upwards to the top of the tank body, the motor stops rotating, and the tank body is filled with water.

S4, placing a water sample: after the water collection is completed, the device is manually taken out of the pond, then a valve on a water suction port of a tank body of the water collection mechanism is closed, the device is transferred to a laboratory, a movable water inlet head and a threaded hose are taken down, a mounting rod capable of being lifted and retracted is collected, a supporting leg is opened, and the whole device is horizontally supported and placed on an experiment table board.

S5, water sample filtration: opening a valve on a water outlet of a tank body of the water sampling mechanism, simultaneously placing filter membranes with different apertures in a filtering connecting neck of the filtering mechanism according to actual needs, starting a motor, driving a driving gear and a gear meshed and connected with the driving gear to rotate anticlockwise, and enabling a piston to move downwards, so that a water sample is discharged into the filtering connecting neck from the tank body, filtered by the filter membranes and then enters a water sample temporary storage tank;

s6, water sample transfer: when the water sample after the filtration is utilized, according to actual needs, the water depth and the filtering effect that the water sample that needs to be transferred corresponds are selected, then the outlet pipe that keeps in the tank bottom with the collecting bottle and water sample through the connecting pipe links to each other, then open its last valve can.

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