CN102243156A - Cup-shaped water sample online filtering device - Google Patents

Abstract

The invention discloses a cup-shaped water sample online filtering device, belonging to the technical field of water quality online analysis. The cup-shaped water sample online filtering device is characterized in that a water sample inlet and a cleaning water inlet are arranged at the top of a gland liner, a liquid level switch is fixedly connected with the top of the gland liner, a clapboard of which the periphery is fixedly connected with an internal side face of a cup body is arranged in the central section of the cup body, a part above the clapboard is an upper cup body while a part below the clapboard is a lower cup body, a water permeable hole is axially arranged on the clapboard so as to communicate the upper cup body with the lower cup body, and filter leaves are arranged between the part above the clapboard and an edge of a lower end of the gland liner. The cup-shaped water sample online filtering device has the advantages of simple structure and convenience in operation. Sample introduction quantity and filtering are controlled by upper limit and lower limit of the liquid level switch, procedures of sample introduction, sampling, cleaning, discharging and the like all can be automatically controlled by opening and closing a valve connected with the water sample inlet and a water sample outlet, and the filter leaves can be replaced very simply and conveniently, so that the cup-shaped water sample online filtering device is suitable for water sample online automatic filtering, particularly for occasions where effective decontamination is needed for measuring the water sample of a soluble object to be measured by using a photometry analyzer.

Description

A cup-type water sample on-line filtration device

technical field

The invention belongs to the technical field of online water quality analysis, and relates to a water sample pretreatment filter device in the field of surface water quality analysis and testing, which can be applied to water sample pretreatment for photometric analysis and testing of soluble analytes.

Background technique

Sewage discharge must meet environmental protection discharge standards, and online automatic monitoring of various indicators of water pollution is an important part of environmental protection work. In the water quality analysis and testing industry, spectrophotometry is one of the commonly used instrumental analysis methods, but the existence of high turbidity (turbidity higher than 50NTU) will seriously affect the correct measurement of photometric analysis instruments. Commercially available products for water sample filtration in chemical laboratories include conical funnels and suction funnels, but products such as conical funnels and suction funnels cannot be applied to the online automatic filtration of water samples in the online automatic monitoring system for water quality. Especially when photometric analyzers are required to measure water samples of soluble analytes, an online automatic filter device for water samples that can be applied to an automatic water quality monitoring system and can effectively remove turbidity is still blank.

Contents of the invention

The object of the present invention is to provide a cup-type water sample on-line filter device that can be applied to an online automatic water quality monitoring system and can effectively remove the turbidity of the water sample.

In order to achieve the above purpose, the technical solution adopted is: a cup-type water sample on-line filter device, including a gland liner, a cup body and a filter piece, characterized in that: the top of the gland liner is equipped with a water sample inlet and the cleaning water inlet, the liquid level switch is fixedly connected with the top of the gland liner, the upper side of the gland liner is equipped with an overflow port, and the lower end of the gland liner is equipped with a discharge port of the gland liner; Above the partition is the upper cup, below the partition is the lower cup, and the water permeable holes arranged in the axial direction on the partition are connected to the upper cup and the lower cup. There is an upper cup discharge port on the lower end of the cup body, the inner diameter of the upper cup body matches the outer diameter of the gland liner, and the upper cup discharge port matches the gland liner discharge port. The position and caliber correspond to each other. There is a cleaning water inlet on the upper side of the lower cup, a sampling port on the lower side, and a discharge port on the lower center of the lower cup. A filter is placed between the top of the partition and the lower edge of the gland liner.

The filter sheet can be any sheet-shaped filter material, such as filter paper, filter membrane, filter screen and the like.

A gasket is placed between the filter piece and the lower edge of the gland liner.

The gland liner is threadedly connected to the end edge of the upper cup body.

The invention has the beneficial effects of simple structure and convenient operation. The total amount of sample injection and the completion of filtration are automatically controlled by the upper and lower limits of the liquid level switch. The procedures of sample injection, sampling, cleaning, and discharge can all be automatically controlled by opening and closing the valve connected to the inlet and outlet of the water sample. It can be selected according to the content of particles and suspended solids in the filtered water sample. It is very simple to replace the filter, just loosen the thumb screw or snap button on the gland to pull out the gland liner. The invention is suitable for on-line automatic filtration of water samples, and is especially suitable for occasions where turbidity needs to be effectively removed when using a photometric analyzer to measure water samples of soluble analytes.

Description of drawings

The present invention will be further described below by means of drawings and examples.

Fig. 1 is a structural representation (section) of the present invention;

Fig. 2 is a schematic diagram (sectional view) of an exploded structure of the present invention.

In the figure, 1-gland liner; 2-filter; 3-cup body; 4-partition; 5-sealing gasket; 6-liquid level switch; 7-water sample inlet; 8-cleaning water inlet; 9- Screw; 10-overflow port; 11-gland liner discharge port; 12-upper cup discharge port; 13-lower cup cleaning water inlet; 14-lower cup discharge port; 15-sampling port.

Detailed ways

Fig. 1 is a schematic diagram of the structure of the present invention, and Fig. 2 is a schematic diagram of the decomposition structure of the present invention. It can be seen from the figure that a cup-type water sample online automatic filtration device includes a gland liner 1, a cup body 3 and a filter piece 2. It is characterized in that: the top of the gland liner 1 is provided with a water sample inlet 7 and a cleaning The water inlet 8, the liquid level switch 6 are fixedly connected to the top of the gland liner 1, the gland liner 1 has an overflow port 10 on the upper side, and a gland liner discharge port 11 on the lower side; the cup body 3 has a A partition 4 that is fixedly connected to the inner surface of the cup body 3 around, the upper cup body is above the partition board 4, and the lower cup body is below the partition board 4, and the permeable hole provided on the upper axis of the partition board 4 is connected to the upper cup body. body and the lower cup body, the lower end side of the upper cup body has an upper cup body discharge port 12, the inner diameter of the upper cup body matches the outer diameter of the gland liner 1, and the upper cup body discharge port 12 corresponds to the position and diameter of the gland liner discharge port 11, the upper side of the lower cup body has a lower cup body cleaning water inlet 13 and an air vent, the lower side has a sampling port 15, and the middle and lower end is the lower cup body discharge port 14 ; There is a filter 2 between the top of the separator 4 and the lower edge of the gland liner 1 .

The filter sheet 2 can be any sheet-shaped filter material, such as filter paper, filter membrane, filter screen and the like.

A gasket 5 is placed between the filter piece 2 and the lower edge of the gland liner 1 .

The gland liner 1 is connected with the edge thread 9 at the end of the upper cup body.

The following takes the present invention applied to the online automatic monitoring system of water quality as an example for further description. The present invention is mainly composed of a gland liner 1, a liquid level switch 6, a filter piece 2 and a cup body 3, and the whole is cylindrical. The cup body 3 and the gland liner 1 are made of high-quality high-strength acid and alkali resistant plexiglass. The inner diameter of the cup body 3 is 130mm, and the outer diameter of the gland liner 1 is 125mm. All pipe joints are made of 6mm commercially available high-quality plastic The joint adopts a layer of medium-speed quantitative filter paper with a diameter of 125mm as the filter piece 2. The end of the filter paper and the end of the gland liner 1 is sealed with a ring-shaped rubber gasket 5, and the space between the gland liner 1 and the cup body 3 is sealed. When fastened with four 6mm thumb screws, a good sealing effect is formed between the separator 4, the filter paper 2, the sealing gasket 5 and the end of the gland liner 1. All water sample inlets or cleaning water inlets, and each discharge port are respectively connected to corresponding valves. The lower cup body discharge port 14 is connected to the lower cup body discharge valve, and whether the water sample is discharged is controlled by the discharge valve.

When the device is working, the water sample enters the gland liner 1 from the water sample inlet 7. When the liquid level inside the gland liner 1 rises and the float of the liquid level switch 6 reaches the upper limit of the switch, the sample injection is stopped. The high and low limits of the liquid level switch 6 can be manually adjusted and fixed in advance as required to control the total amount of sample injection and ensure that the water volume meets the needs of analysis and testing without excessive redundancy. The water and water-soluble substances in the gland liner 1 permeate the filter piece 2 under the action of its own gravity, flow into and store in the lower cup through the permeable holes of the partition plate 4, and the insoluble particles such as sediment in the water sample and Suspended matter is intercepted by the filter sheet 2, so as to achieve the purpose of filtration. When the float of the liquid level switch 6 reaches the lower limit of the switch along with the drop of the water level in the gland liner 1, the filtration is completed. The filtered water sample can be directly used for analysis and testing through the sampling port 15 below the cup body 3 . After the sampling is completed, the discharge valve of the lower cup is opened, and the remaining water samples are discharged from the discharge port 14 of the lower cup. At the same time, the cleaning water valve and the discharge valve of the upper cup are opened, and the cleaning water enters the gland liner from the cleaning water inlet 8 1, and flow out from the discharge port 11 of the gland liner and the discharge port 12 of the upper cup body, thereby forming the cleaning of the interior of the gland liner 1 and the filter disc 2. The cleaning water enters the lower cup body from the cleaning water inlet 13 of the lower cup body, and flows out from the discharge port 14 of the lower cup body, thereby forming the cleaning of the lower cup body. After cleaning, the cleaning water valve, the upper cup body discharge valve and the lower cup body The discharge valves are closed one by one, and the whole cycle process is completed.

The filter disc 2 needs to be replaced after being used for a period of time. By manual operation, loosen the screw 9 or the snap button on the gland liner 1 to extract the gland liner 1, and then the filter disc 2 can be replaced. The operation is quite simple. The replacement frequency of the filter sheet 2 is affected by the amount of particles and suspended solids in the filtered water sample, the total amount of the filtered water sample, and the material structure of the filter sheet, depending on the actual application situation.

Claims (4)

1. cup type water sample on-line filtration device, comprise gland lining, cup and filter disc, it is characterized in that: the top of described gland lining is equipped with water sample import and rinse water import, level switch is fixedlyed connected with gland lining top, and gland lining upper end one side has overflow vent, lower end one side that gland lining floss hole is arranged; The dividing plate of fixedlying connected with described cup medial surface around the cup middle part is equipped with, described dividing plate is above to be last cup, dividing plate is following to be lower cup body, the permeable hole that axially is equipped with on the dividing plate is communicated with goes up cup and lower cup body, described cup lower end one side of going up has last cup floss hole, the described identical coupling of external diameter that goes up the internal diameter and the described gland lining of cup, described upward the cup floss hole is corresponding consistent with the position bore of described gland lining floss hole, and the lower cup body upper side is equipped with the rinse water import, lower end side is equipped with sample tap, hits exactly the lower end is the lower cup body floss hole; Be equipped with filter disc between the edge, lower end of dividing plate top and gland lining.

2. according to the described a kind of cup type water sample on-line filtration device of claim 1, it is characterized in that: described filter disc is the filtering material of sheet.

3. according to the described a kind of cup type water sample on-line filtration device of claim 1, it is characterized in that: be equipped with sealing gasket between the edge, lower end of described filter disc and described gland lining.

4. according to the described a kind of cup type water sample on-line filtration device of claim 1, it is characterized in that: described gland lining is threaded with the edge, upper end of described cup.

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