CN209148364U - A field water sample collection filter device - Google Patents

Abstract

The utility model provides a kind of wild water sample collection filter device, including filtering frame, filtering frame includes open-topped lower layer's water tank, the upper layer water tank and filter membrane support plate with holes that top and bottom are open respectively, filter membrane support plate is equipped with filter membrane, the top open part of upper layer water tank is equipped with cover, cover is equipped with water injection hole, lower layer's water tank is equipped with air inlet, aspirating hole and acquisition hole, wherein air inlet and acquisition hole are equipped with plug, water injection hole and aspirating hole are connected to two mouths of triple valve respectively, another mouthful of triple valve is connected to the hose of two-way peristaltic pump.The utility model improves on the basis of existing acquisition and filter device, collection is acquired, is filtered, being collected in one, and structure is simple, can pass through easy steps, complete the acquisition filter process of water sample, reduce manual operation error, improve the real-time and precision of water sampling, disturbs small, pollution is few, safety is stablized, and can satisfy the demand of wild water sample collection filtering.

Description

A field water sample collection filter device

technical field

The utility model relates to a field water sample collection and filtering device, which belongs to the technical field of environmental monitoring equipment.

Background technique

Water sample collection is an important step in the process of water research, water quality monitoring, and water resources investigation and evaluation. It is very important that the sampling device is simple, fast, practical and capable of collecting representative water samples. For the collection of turbid water samples, refer to the requirements of the regional groundwater pollution investigation and evaluation specification (DZT0288-2015), and the collection of turbid water samples should be equipped with online filtering components or other practical on-site filtering devices. During or after sampling, the sample is filtered with a filter or centrifuged to remove suspended solids, sediment, algae and other microorganisms. When measuring inorganic items, 0.45μm filter membrane is often used for filtration.

Existing water sample collection and filtration devices are generally a separate device, that is, first use the collection device to collect water samples, and then transfer the water samples into the filter assembly container, start the filter device, perform the filtration steps, and then transfer the filtered water samples. Pour into the sampling bottle. The field portable filtration device used in the filtration step is usually a manual vacuum pump (such as a Nalgene repairable PVC manual vacuum pump), which is laborious to use, easy to damage, and has a relatively single function, which makes the entire process require multiple equipment assembly and water sample transfer. The steps of water sample collection and filtration cannot be carried out continuously online, and the steps of water sample collection and filtration are added, which increases the disturbance to the water sample and the possible pollution interference caused by the sampling process, which is not conducive to real-time, low-disturbance, representative water in the field. sample collection work.

SUMMARY OF THE INVENTION

In order to solve the deficiencies of the prior art, the utility model provides a field water sample collection and filtration device, which is improved on the basis of the existing collection and filtration device, integrates collection, filtration and collection, and has a simple structure, which can be passed through Simple steps to complete the process of collecting and filtering water samples, reducing human operation errors, improving the real-time performance and accuracy of water sample collection, small disturbance, less pollution, safe and stable, and can meet the needs of field water sample collection and filtering.

The technical scheme adopted by the present utility model to solve the technical problem is as follows: a field water sample collection and filtering device is provided, which includes a filter frame, and the filter frame includes a lower-layer water storage tank with an opening at the top and an upper-layer water storage tank with openings at the top and the bottom respectively. A water storage tank and a perforated filter membrane support plate, the filter membrane support plate is connected between the bottom opening of the upper water storage tank and the top opening of the lower water storage tank, the filter membrane support plate is provided with a filter membrane, and the upper water storage tank There is a tank cover at the top opening of the tank cover, and a water injection hole on the tank cover. The air holes are respectively connected with the two ports of the three-way valve through the hose, and the other port of the three-way valve is connected with the hose of the bidirectional peristaltic pump.

The bottom outer wall of the upper water storage tank and the top outer wall of the lower water storage tank are respectively provided with external threads, and the upper water storage tank and the lower water storage tank are screwed and fixed by a threaded cover provided with an internal thread.

The bottom opening of the upper water storage tank and the top opening of the lower water storage tank are provided with sealing rings.

Both the bidirectional peristaltic pump and the three-way valve are connected with the control unit.

The bottom of the cavity of the lower water storage tank is inclined toward the collection hole.

The beneficial effect that the utility model has based on its technical scheme is:

(1) A field water sample collection and filtering device provided by the present utility model makes full use of the functions of the forward and reverse knobs of the bidirectional peristaltic pump, and the waterway shifting function of the three-way valve, so as to connect the upper water storage when the bidirectional peristaltic pump rotates forwardly The tank is used for pumping and sampling, and the two-way peristaltic pump is connected to the lower water storage tank for filtration when the two-way peristaltic pump is reversed, which greatly simplifies the sampling and filtration process. It is suitable for the field collection of filtered water samples in the field;

(2) The bottom outer wall of the upper layer water storage tank and the top outer wall of the lower layer water storage tank of a field water sample collection and filtering device provided by the utility model can be respectively provided with external threads, and the upper layer water storage tank and the lower layer water storage tank pass through the device. The screw cap with internal thread is screwed and fixed, the tightening effect is good, and it is convenient to disassemble and replace the microporous filter membrane;

(3) The bottom opening of the upper water storage tank and the top opening of the lower water storage tank of a field water sample collection and filtering device provided by the present utility model can be provided with sealing rings to further ensure that the water samples are carried out in a closed environment and reduce sampling The pollution brought by the process is conducive to the formation of negative pressure in the suction filtration of water samples, which is suitable for the field collection of water samples that need to be filtered in the field;

(4) The bidirectional peristaltic pump and the three-way valve of the field water sample collection and filtration device provided by the utility model can be connected to the control unit, and the control unit can adopt a control panel mainly based on a micro-control chip to realize the automation of sampling and filtration;

(5) The bottom of the cavity of the lower water storage tank of the field water sample collection and filtering device provided by the utility model is inclined towards the collection hole, and the sampling hole can be connected to the sampling bottle through the water pipe connected to the collection bottle, so as to realize online filtering after filtering. water sample collection;

(6) After many times of field water sample collection and filtration practice, the utility model provides a field water sample collection and filtration device with simple operation, high sampling and filtration efficiency, small disturbance, less pollution, safety and stability, and the method is feasible and can meet the needs of field The need for water sample collection and filtration.

Description of drawings

FIG. 1 is a schematic structural diagram of a field water sample collection and filtering device provided by the present invention.

Figure 2 is a schematic diagram of the connection between the upper water storage tank and the lower water storage tank.

In the picture: 1- upper water storage tank, 2- air inlet, 3- collection hole, 4- lower water storage tank, 5- hose, 6- three-way valve, 7- two-way peristaltic pump, 8- water injection hole, 9-Thread cover, 10-Filter membrane, 11-Air exhaust hole, 12-Water inlet pipe, 13-Bevel surface, 14-Control unit, 15-Tank cover, 16-Filter membrane support plate.

Detailed ways

The utility model will be further described below in conjunction with the accompanying drawings and embodiments.

The utility model provides a field water sample collection and filtering device, referring to FIG. 1 and FIG. 2 , including a filter frame, the filter frame includes a lower water storage tank 4 with an opening at the top, and an upper water storage tank 1 with openings at the top and bottom respectively. And the filter membrane support plate 16 with holes, the filter membrane support plate 16 is connected between the bottom opening of the upper layer water storage tank 1 and the top opening of the lower layer water storage tank 4, and the filter membrane support plate 16 is provided with the filter membrane 10, so The filter membrane can be a 45μm microporous filter membrane according to the filtration requirements. The top opening of the upper water storage tank is provided with a tank cover 15, the tank cover 15 is provided with a water injection hole 8, and the lower water storage tank is provided with air intake holes 2, suction The air hole 11 and the collection hole 3, wherein the air inlet hole 2 and the collection hole 3 are provided with plugs, and the water injection hole 8 and the air extraction hole 11 are respectively connected with the two ports of the three-way valve 6 through the hose 5. The other port communicates with the hose of the bidirectional peristaltic pump 7 .

The bottom outer wall of the upper water storage tank and the top outer wall of the lower water storage tank are respectively provided with external threads.

The bottom opening of the upper water storage tank and the top opening of the lower water storage tank are provided with sealing rings.

The use process of the field water sample collection and filtration device provided by the present invention is as follows: first, the filter membrane 10 is installed on the filter membrane support plate 16, and the filter membrane support plate 16 is placed on the upper water storage tank 1 and the lower water storage tank 4. Between, the screw cap 9 is screwed tightly to make the upper water storage tank 1 and the lower water storage tank 4 compacted, the water inlet pipe 12 of the two-way peristaltic pump 7 is placed in the appropriate depth of the sampling water body, the two-way peristaltic pump power switch is turned on, and the two-way peristalsis is started. Turn the knob forward, the two-way peristaltic pump starts to pump water. When water flows out from the outlet of the hose 5 of the two-way peristaltic pump, wait for a while, and after the sample has fully rinsed the pipeline, connect the outlet to the water injection hole of the upper water storage tank 1 , inject the water sample into the upper water storage tank, rinse the upper water storage tank 1 three times with the water sample, and then formally store the water sample in the upper water storage tank 1. After the water volume is appropriate, switch the three-way valve 6 to make the lower water storage tank The air suction hole 11 of 4 is communicated with the two-way peristaltic pump 7, plug the air inlet hole 2 of the lower water storage tank 4 and the plug of the collection hole 3, lift the water inlet pipe 12 away from the sampling liquid surface, and start the reverse knob of the two-way peristaltic pump, The two-way peristaltic pump starts to suck back to realize the suction process of the filter. The filter starts to filter. When there is a small amount of water in the lower water storage tank 4, the two-way peristaltic pump 7 is shut down, and the lower storage tank is fully rinsed with the filtered water sample. After the water tank 4, pull out the plugs of the air inlet 2 and the collection port 3, remove the water sample from the lower water storage tank, re-plug the plugs of the air inlet 2 and the collection port 3, and start the two-way peristaltic pump 7 to suck back. , continue to filter, when the water filtration in the upper water storage tank 1 of the filter is completed, shut down the two-way peristaltic pump 7, pull out the plugs of the air inlet 2 and the collection hole 3, and filter the water in the lower water storage tank of the filter. The water sample is transferred to the collection bottle through the collection hole 3, and the filtration sampling is completed.

The bottom surface of the cavity of the lower water storage tank can be provided with an inclined surface 13 inclined toward the collection hole, so as to further improve the collection efficiency.

The two-way peristaltic pump and the three-way valve are both connected to the control unit 14, and the control unit can use a control panel mainly based on a micro-control chip to realize the automation of sampling and filtering.

The utility model provides a field water sample collection and filtration device, which is improved on the basis of the existing collection and filtration device, integrates collection, filtration and collection, has a simple structure, and can complete the collection of water samples through simple steps The filtration process reduces human operation errors, improves the real-time performance and accuracy of water sample collection, has small disturbance, less pollution, is safe and stable, and can meet the needs of field water sample collection and filtration.

Claims (5)

1. a field water sample collection and filtration device, comprising a filter rack, is characterized in that: the filter rack comprises a lower-level water storage tank with top opening, an upper-level water storage tank with openings at the top and bottom respectively, and a perforated filter membrane support plate , the filter membrane support plate is connected between the bottom opening of the upper water storage tank and the top opening of the lower water storage tank, the filter membrane support plate is provided with a filter membrane, the top opening of the upper water storage tank is provided with a tank cover, the tank cover There is a water injection hole on the upper layer, and the lower water storage tank is provided with an air intake hole, an air extraction hole and a collection hole. One port is connected, and the other port of the three-way valve is connected with the hose of the bidirectional peristaltic pump. 2. The field water sample collection and filtering device according to claim 1 is characterized in that: the bottom outer wall of the upper layer water storage tank and the top outer wall of the lower layer water storage tank are respectively provided with external threads, and the upper layer water storage tank and the lower layer storage tank are respectively provided with external threads. The water tank is screwed and fixed by a threaded cover provided with internal threads. 3 . The field water sample collection and filtering device according to claim 1 , wherein the bottom opening of the upper water storage tank and the top opening of the lower water storage tank are respectively provided with sealing rings. 4 . 4 . The field water sample collection and filtering device according to claim 1 , wherein the two-way peristaltic pump and the three-way valve are both connected to the control unit. 5 . 5 . The field water sample collection and filtering device according to claim 1 , wherein the bottom of the cavity of the lower water storage tank is inclined toward the collection hole. 6 .