CN209173547U - a porous filter - Google Patents

Abstract

The utility model discloses a porous filter head, which comprises more than two filter parts on the top and a filtrate collecting part at the bottom; The filtrate collection part includes a collection pipe, a liquid collection port, and a liquid collection port valve. The utility model can filter multiple samples at the same time and obtain multiple particle levels of suspended particles, with high efficiency and simple operation, and can also choose to mix the filtrate inside or outside the device, and the filtrate is convenient to handle; The three important functions of filtering and mixing liquid are integrated into one, flexible and changeable, with strong operability, very suitable for indoor large-scale filtration operations. The utility model is more convenient to use when the sample inlet is scaled, the longitudinal section is a trapezoid with a large upper part and a smaller lower part, the collection pipe is oblique and the right end is arc-shaped downward.

Description

a porous filter

technical field

The utility model relates to the technical field of water environment monitoring, in particular to a porous filter head.

Background technique

In the natural water environment, suspended particles generally refer to the solid particles that pass through a filter membrane with a pore size of 0.45 μm and are dried to constant weight at 103-105 °C. In recent years, water pollution has become a prominent global environmental problem. In natural water bodies, suspended particulate matter is an important medium for various pollutants to exist in water bodies. Due to the large specific surface area and other related properties of suspended particulate matter, the It plays a very important role in the migration and transformation of pollutants in natural water bodies. Therefore, it is of great significance to study the relevant properties of suspended particulate matter in water bodies to explain the migration, transformation and final fate of pollutants in water bodies. The collection method and collection device of suspended particulate matter in natural water bodies have become the basis of research work on suspended particulate matter. At present, the commonly used method for sampling suspended particulates in water is to collect a certain volume of water samples and then pass through a filter device to obtain suspended particulates in water, but most of them are time-consuming, and only one sample can be filtered at a time and only one particle size of suspended particulates can be obtained. , The filtrate is inconvenient to handle, and the operation is cumbersome, especially for the filtration of ultra-miniature phytoplankton.

Utility model content

The purpose of the utility model is to overcome the above-mentioned defects of the prior art, and provide a porous filter head with high efficiency, simple operation, complete filtrate collection and convenient processing, which can filter multiple samples at one time and obtain multiple particle-level suspended particles.

In order to achieve the above object, the utility model provides a porous filter head, which is characterized in that: the porous filter head includes more than two upper filtering parts and the bottommost filtrate collecting part;

The filter part includes a detachable and hermetically connected sample inlet, a zero to multi-layer circular cake-shaped filter plate, an integrally manufactured filter head, and a longitudinal collection pipe from the upper end to the lower end of the morphology. The filter plate is covered with a glass ring , on the entire circumference of the ring, the upper surface is provided with one or more recessed small holes, and the lower surface is provided with a shape and size corresponding to the small holes that can be inserted into the small holes. The inside of the filter plate is inlaid with special materials to allow water samples to pass through. The filter head is divided into an upper part and a lower part. The upper part has the same structure as the filter plate except that there is no protrusion. The lower part , two outer layers, the inner layer is funnel-shaped and connected to the upper part, the outer layer is close to the longitudinal collection pipe, the side wall of the outer layer is provided with a horizontal air hole that can be connected with the vacuum pump, and the longitudinal collection pipe is provided with A liquid discharge port and a vertical collection pipe valve, the liquid discharge port is provided with a liquid discharge port valve, the vertical height of the vertical collection pipe valve is slightly lower than the liquid discharge port, and the vertical collection pipe valve is closed In the case of a pipeline valve, an inclined surface is formed between the longitudinal collection pipeline valve and the liquid discharge port;

The filtrate collection part includes a collection pipe connected to the lower end of the longitudinal collection pipe and provided with a liquid collection port, and a liquid collection port valve is provided on the liquid collection port.

Preferably, the collection pipe is an oblique collection pipe, the left end of the oblique collection pipe is slightly higher than the right end, and the right end pipe is arc-shaped downward, and the liquid collection port is set at the lowest point of the arc.

Further preferably, the injection port is scaled, and the longitudinal section is a trapezoid with a large top and a small bottom.

The beneficial effect of the utility model is that: the device can filter multiple samples at the same time and obtain suspended particles of multiple particle sizes, with high efficiency and simple operation, and can also choose to mix the filtrate inside or outside the device, and the filtrate is convenient to process ;This device integrates the three important functions of measuring, filtering and mixing liquids. It is flexible and changeable, and has strong operability. It is very suitable for indoor large-scale filtration operations.

Description of drawings

Fig. 1 is a structural representation of the utility model;

Fig. 2 is the front view of filter plate;

Figure 3 is a top view of the filter plate;

FIG. 4 is a schematic diagram showing the closing of the longitudinal collection pipe 41 .

Detailed ways

In order to better understand the utility model, the embodiments are described in detail below in conjunction with the accompanying drawings. It should be understood that this embodiment is only used to illustrate the utility model, but not to limit the scope of the utility model.

Unless otherwise specified, the technical means adopted in this embodiment are conventional technical means in the field.

Referring to Figures 1-4, the porous filter head includes four upper filter parts and the bottommost filtrate collection part

The filter part includes a detachable and sealingly connected trapezoidal longitudinal section sample inlet 1, a multi-layer circular cake-shaped filter plate 2, an integrally manufactured filter head 3, and a longitudinal collection pipe from the upper end to the lower end of the morphology. 4. The size of the circular lower bottom surface of the sample inlet 1 just fits closely with the upper bottom surface of the filter plate 2, and is used to hold water samples and press the filter membrane of the filter plate 2. The filter plate 2 is covered with a glass ring 21. On the entire circumference of the ring 21, one or more concave small holes 22 are arranged on the upper surface, and convex holes 22 are arranged on the lower surface corresponding to the small holes 22. Column 23, the convex column 23 and the small hole 22 can just fit, when the filter plate 2 has two or more layers, the convex column 23 of the upper filter plate 2 is just inserted into the small hole 22 of the lower filter plate 2, which is convenient for filtering The plates 2 are fixed when they are stacked and used; the filter plate 2 is embedded with a special filter material 24 to allow water samples to pass through. The number of overlapping filter plates 2 can be selected according to needs. The filter head 3 is divided into an upper part 31 and a lower part 32. The upper part 31 has the same structure as the filter plate 2 except that there is no protrusion 23. The lower part 32 is divided into two layers, an inner layer and an outer layer. The upper part 31 is connected to collect filtered water samples. The outer layer is close to the longitudinal collection pipe 4 for fixing and sealing. The side wall of the outer layer is provided with a horizontal air extraction hole 33 connected to the vacuum pump. The entire filter head is integrally manufactured, and the filter plate is removed. The outer seal is extremely strong. The vertical collection pipe 4 is provided with a discharge port 5 and a vertical collection pipe valve 41, the liquid discharge port 5 is provided with a discharge port valve 42, and the height of the vertical collection pipe valve 41 in the vertical direction is Slightly higher than the discharge port 5, and when the valve 41 of the longitudinal collection pipe is closed, an inclined surface is formed between the valve 41 of the longitudinal collection pipe and the discharge port 5 (as shown in FIG. 4 ), so as to Ensure that the filtrate flowing down on the vertical collection pipe 4 is discharged through the discharge port 5 when the valve 41 of the vertical collection pipe is closed and the valve 42 of the discharge port is opened; Connected oblique collection pipe 6, the left end of the oblique collection pipe 6 is slightly higher than the right end, and the right end pipe is arc-shaped downward, so as to ensure that all the collected filtrate can converge to the lowest point of the arc pipe at the right end of the collection pipe , the lowest part is provided with a liquid collection port 51, and the oblique collection pipe 6 is not communicated with the outside world except that it communicates with the longitudinal collection pipes 4 of the four filter parts and communicates with the outside world through the liquid collection port 51. The liquid collection port 51 is provided with a liquid collection port valve 43, and the oblique collection pipe 6 is used to collect, mix and discharge the liquid discharged from each longitudinal collection pipe 4, for example, the desired product is obtained after filtering two liquids The mixed liquid formed by the liquid can be directly completed in the horizontal collecting pipe 6 , and then discharged and collected through the liquid collecting port 51 .

When using the utility model to work, first observe the turbidity of the liquid to be filtered. If the turbidity is large, pre-filter to remove larger impurities and sediment, and then insert the filter head 3 on the longitudinal collection pipe 4 to ensure that both The joints are tightly connected to ensure the quality of suction filtration. Make sure the joints are dry to ensure that the device can be disassembled. If there is liquid between the joints, it is extremely difficult to separate under the action of external air pressure. After installation, close all valves and filter The horizontal suction hole 33 on the head 3 is connected with the vacuum pump of the external device. Select the stacking number of filter plates 2 according to the needs and place a filter membrane with a suitable pore size on the filter plate 2. Only one filter membrane can be placed on a filter plate 2. When placing the filter membrane, ensure that the filter membrane completely covers the center of the filter plate 2. The circular special filter material 24 is then used to embed the convex column 23 on the lower surface of another filter plate 2 into the concave hole 22 on the upper surface of the filter head 3 to press the filter membrane. If only the filter head 3 is needed, it can be used directly Injection port 1 is pressed together. Be careful not to cause the filter membrane to slip sideways during pressing. Sideways slippage will cause some water samples to fail to filter, and the filtration will fail. For example, if the operator needs to obtain small, micro, and ultra-micro particles Phytoplankton can place the filter membranes corresponding to the pore size from bottom to top in order from small to large. In this way, the top filter membrane only has small-scale phytoplankton, and the middle layer of filter membrane only has micro-scale phytoplankton. For plants, the bottom filter membrane only has ultra-miniature phytoplankton plants. If the filter membrane slides sideways, there will be small-scale phytoplankton on the micro- and ultra-micro-filtration membranes, and the small-scale filter membranes cannot obtain all The particle size phytoplankton, ie the filter fails. If it is only necessary to obtain phytoplankton larger than a certain particle size, the filter plate 2 is not needed, and the corresponding filter membrane can be directly placed on the top of the filter head 3, because the upper part of the filter head 31 has the same structure as the filter plate 2 but has no protrusions. Column 23. After the above-mentioned links are checked correctly, first close all valves, take the liquid to be filtered or the liquid obtained by pre-filtering according to the required volume, and then slowly pour the measured liquid into the injection port 1, and be careful not to let the liquid If the liquid is splashed, the filtered product will not be accurate. Turn on the vacuum pump, the air pressure inside the device decreases, and the liquid in the injection port 1 flows through the filter plate 2 and the filter membrane on each filter plate 2 in sequence under the action of gravity and air pressure, and the filtrate passes through the funnel-shaped inner layer of the lower part of the filter head 32. Collect and discharge in the vertical collection pipeline 4, at this moment, can open or close the vertical collection pipeline valve 41 as required to make the filtrate discharge in the oblique collection pipeline 6 or discharge the device through the discharge port 5, if the vertical collection pipeline valve 41 and When the liquid collection port valve 43 is opened and the liquid discharge port valve 42 is closed, the liquid enters the oblique collection pipe 6 and is mixed with the filtered liquid in other longitudinal collection pipes 4 and then discharged from the liquid collection port 51. If the vertical collection pipe valve 41 is closed, the liquid is discharged When the liquid port valve 42 is opened, the liquid is discharged from the pipe through the liquid discharge port 5 . In order to ensure the tightness of the device, the liquid discharge needs to wait until all the liquid is filtered.

Claims (3)

1. A porous filter head, characterized in that: said porous filter head includes more than two filter parts above and a filtrate collecting part at the bottom; The filter part consists of a detachable and hermetically connected sample inlet (1), a zero to multi-layer circular cake-shaped filter plate (2), an integrally manufactured filter head (3), and a longitudinal collection pipe from the top to the bottom of the morphology. (4), the filter plate (2) is covered with a glass ring (21), on the entire circumference of the ring (21), the upper surface is provided with one or more concave holes (22), the lower surface Corresponding to the small hole (22), there is a convex column (23) that can be inserted into the small hole (22) in shape and size, and the inside of the filter plate (2) is embedded with a special filter. The material (24) is used to pass through the water sample. The filter head (3) is divided into an upper part (31) and a lower part (32). The upper part (31) has the same structure as the filter plate (2) except that there is no boss ( 23), the lower part (32) is divided into inner and outer layers, the inner layer is funnel-shaped and connected to the upper part (31), the outer layer is close to the longitudinal collection pipe (4), and the side wall of the outer layer is provided with a The horizontal air extraction hole (33) connected with the vacuum pump is provided with a liquid discharge port (5) and a vertical collection pipe valve (41) on the vertical collection pipe (4), and a discharge port (5) is provided with a drain Liquid port valve (42), the vertical height of the vertical collection pipe valve (41) is slightly lower than the liquid discharge port (5), and when the vertical collection pipe valve (41) is closed, the An inclined surface is formed between the longitudinal collection pipe valve (41) and the liquid discharge port (5); The filtrate collection part includes a collection pipe connected to the lower end of the longitudinal collection pipe (4) and provided with a collection port (51) on which a collection port valve ( 43). 2. The porous filter head according to claim 1, characterized in that: the collection pipe is an oblique collection pipe (6), the left end of the oblique collection pipe (6) is slightly higher than the right end, and the right end pipe is an arc The shape is downward, and the liquid collection port (51) is set at the lowest point of the arc. 3. The porous filter head according to claim 2, characterized in that: the injection port (1) is graduated, and the longitudinal section is a trapezoid with a large top and a small bottom.