Multilayer filtering type marine water quality sampling device

Abstract

The application relates to the field of sampling devices and discloses a multilayer filtering type marine water quality sampling device which comprises a sampling device body, a sampling cavity arranged in the sampling device body, a sampling tube arranged in the sampling cavity, and outwardly inclined inclined plates arranged on the left and right sides of the sampling cavity and outwardly communicated through the inlet arranged on the left and right sides of the sampling cavity. The device is provided with multiple filtering sampling tubes with different pre-set filter membranes in the interiors, the filter membrane apertures of the filtering sampling tubes are gradually reduced from bottom to top, an efficient multistage filtering system is constructed, seawater flows through the filtering tubes under the action of negative pressure, large-diameter impurities and biological debris are intercepted by the first layer, and finer particles are captured by the upper filter membranes. The structure fundamentally solves the problem that the traditional single-layer filtering device cannot collect samples according to particle sizes, and provides the possibility for subsequent research on plankton and particles in different particle size ranges.

Description

TECHNICAL FIELD

[0001] The application relates to the field of sampling devices, in particular to a multi-layer filtering type marine water quality sampling device. BACKGROUND

[0002] The multi-layer filtering type marine water quality sampling device is a marine environment monitoring equipment integrating multi-stage filtering technology, which realizes screening and collection of seawater samples through filter membranes or filtering structures with different pore sizes and is widely applied to the fields of marine ecological research, environmental monitoring and microbial analysis.

[0003] However, the existing sampling device is generally provided with only a single-layer filtering device and cannot sequentially intercept impurities with different particle sizes, and the seawater and impurities cannot be separated during sampling, so that part of the remains of plankton or aquatic plants and other impurities are extracted into the sampling device. SUMMARY

[0004] The application provides a multi-layer filtering type marine water quality sampling device which overcomes the defects described in the background art.

[0005] The application solves the technical problems by adopting the technical scheme that

[0006] The multi-layer filtering type marine water quality sampling device comprises a sampling device body, a sampling cavity is arranged in the sampling device body, a sampling pipe is arranged in the sampling cavity, outwardly inclined inclined plates are arranged on the left and right sides of the sampling cavity, and the sampling cavity is outwardly communicated through the inlet arranged on the left and right sides.

[0007] The sampling cavity is divided into an inner cavity and an outer cavity by a filter plate arranged in the middle of the sampling cavity, the sampling pipe is installed in the outer cavity, the lower end of the sampling pipe extends into the inner cavity through the filter plate, and the sampling pipe is externally connected with an air compressor to generate negative pressure through the communication pipe arranged at the upper end of the sampling pipe.

[0008] The lower end of the inclined plate is rotatably installed with an intercepting plate, the surface of the lower end of the inclined plate close to the intercepting plate is parallel to the horizontal line, and there is a gap between the inclined plate and the inlet, when the air compressor generates negative pressure, the intercepting plate swings upward and seawater around the sampling device body is extracted through the inlet.

[0009] In a preferred technical scheme, the sampling pipe comprises a layered pipe, a seepage pipe, an electric push rod and a ring-shaped sampling pipe, the ring-shaped sampling pipe is arranged on the outer side of the lower part of the sampling device body, the layered pipe comprises a fixed pipe and a plurality of filtering sampling pipes arranged at the lower end of the fixed pipe, the fixed pipe and the filtering sampling pipes are communicated with each other, the seepage pipes are symmetrically arranged on the left and right sides of the fixed pipe, the fixed pipe is communicated with two pressurizing holes arranged in the seepage pipes through the communication ports arranged on the two sides, and the two pressurizing holes are communicated with the ring-shaped sampling pipe through the communication pipes two arranged at the lower ends.

[0010] The upper end of each seepage pipe is provided with an electric push rod, the electric push rod is fixed through a fixing plate, a piston plate arranged in the seepage pipe is arranged on the output shaft of the electric push rod, and the horizontal height of the piston plate is higher than the horizontal height of the communication port when the output shaft of the electric push rod is retracted.

[0011] In a preferred technical solution, the pressurizing hole is composed of pressurizing seepage holes one and two, the pressurizing seepage hole one is arranged on the pressurizing seepage hole two, the cross-sectional profile of the pressurizing seepage hole one is the same as that of the piston plate, and the surface area of the pressurizing seepage hole two is smaller than that of the pressurizing seepage hole one.

[0012] The pressurizing seepage hole two is communicated with the communication pipe two, and a permeable membrane is arranged at the connecting end of the pressurizing seepage hole two and the communication pipe two.

[0013] In a preferred technical solution, a magnetic block one is arranged at the lower end of the communication pipe two, a magnetic block two is arranged at the corresponding position of the magnetic block one of the annular sampling pipe, the magnetic block two is adsorbed to the magnetic block one, and the communication pipe two is communicated with the annular sampling pipe when the magnetic block two is adsorbed to the magnetic block one.

[0014] The annular sampling pipe is provided with an anti-skid strip on the side close to the body of the sampling device.

[0015] In a preferred technical solution, a filter membrane and a particulate matter sampling plate are arranged in each filter sampling pipe, the filter membrane is arranged above the particulate matter sampling plate, a gap is formed between the end of the particulate matter sampling plate and the inner end of the filter sampling pipe, and the particulate matter sampling plate is arranged in an inclined manner.

[0016] The surface of the lower end of the left and right ends of the particulate matter sampling plate is provided with a discharge port.

[0017] In a preferred technical solution, a rotating shaft and a sealing strip are arranged at the upper end of the filter sampling pipe, the filter sampling pipe is fixed through the rotating shaft, and the sealing strip extends along the surface of the upper end of the filter sampling pipe.

[0018] The filter diameters of the filter membranes arranged in all the filter sampling pipes gradually decrease from bottom to top.

[0019] Compared with the prior art, the technical solution has the following advantages:

[0020] The device is provided with a plurality of filter sampling pipes with different pre-arranged filter membranes in the interior, and the filter membrane pore diameters gradually decrease from bottom to top, thereby constructing a high-efficiency multi-stage filtering system. Under the action of negative pressure, seawater flows through these filter pipes in sequence, large-diameter impurities and biological debris are intercepted by the first layer, and finer particulate matters are captured by the upper filter membranes. This structure fundamentally solves the problem that the traditional single-layer filtering device cannot collect samples according to particle size, and provides the possibility for subsequent research on plankton and particulate matters in different particle size ranges.

[0021] Through the parallel design of the layered pipe and the seepage pipe, the synchronization of solid-liquid separation and sample collection is realized, and the booster effect formed by the piston plate and the booster hole in the seepage pipe can pressurize the seawater and force it to pass through the high-precision permeation membrane, and the active pressurized filtration process ensures that the pure water sample containing few particulate interferents finally flows into the annular sampling pipe. BRIEF DESCRIPTION OF DRAWINGS

[0022] The present application will be further described below in conjunction with the drawings and examples.

[0023] Figure 1 is the overall diagram of the present application.

[0024] Figure 2 is the schematic diagram when the intercepting plate is opened.

[0025] Figure 3 is the schematic diagram of the sampling pipe.

[0026] Figure 4 is the perspective schematic diagram of Figure 3 .

[0027] Figure 5 is the sectional view of the layered pipe.

[0028] Figure 6 is the front view of Figure 5 .

[0029] Figure 7 is the enlarged schematic diagram of b in Figure 6 .

[0030] Figure 8 is the enlarged schematic diagram of c in Figure 6 .

[0031] Figure 9 is the top view schematic diagram of the filter sampling pipe.

[0032] Figure 10 is the enlarged schematic diagram of a in Figure 3 .

[0033] Figure 11 is the structural schematic diagram in the filter sampling pipe.

[0034] In the figure: sampling device body 1, sampling pipe 2, traction rope 100, communication pipe 1 200;

[0035] inclined plate 11, inlet 12, intercepting plate 13, filter plate body 14, connecting hook 15;

[0036] seepage pipe 21, fixed pipe 22, filter sampling pipe 23, electric push rod 24, annular sampling pipe 25;

[0037] Boost hole 211, communication pipe two 212, magnetic block one 2121, permeable membrane 213;

[0038] Communication port 221;

[0039] Filter membrane 231, particulate matter sampling plate 232, shaft 233, sealing strip 234;

[0040] Piston plate 241;

[0041] Magnetic block two 251, anti-skid strip 252. DETAILED DESCRIPTION

[0042] As Figures 1 to 11 shown, the present application proposes a multi-layer filtering type marine water quality sampling device, comprising a sampling device body 1, a sampling cavity is arranged in the sampling device body 1, a sampling tube 2 is arranged in the sampling cavity, outwardly inclined inclined plates 11 are arranged on the left and right sides of the sampling cavity respectively, and the sampling cavity is communicated outwardly through the inlet ports 12 arranged on the left and right sides;

[0043] The sampling cavity is divided into inner and outer chambers through the filter plate body 14 arranged in the middle, the sampling tube 2 is installed in the outer chamber, and the lower end of the sampling tube 2 extends into the inner chamber through the filter plate body 14, the sampling tube 2 is connected to an air compressor to generate negative pressure through the communication pipe one 200 arranged on the upper end thereof, the lower end of the inclined plate 11 is rotatably installed with an intercepting plate 13, and the surface of the lower end of the inclined plate 11 close to the intercepting plate 13 is provided with a limiting plate 111, the limiting plate 111 is parallel to the horizontal line, and there is a gap between the limiting plate 111 and the inlet port 12, when negative pressure is generated through the air compressor, the intercepting plate 13 swings upward and extracts seawater around the sampling device body 1 through the inlet port 12;

[0044] Further, the sampling tube 2 comprises a layered tube, a seepage tube 21, an electric push rod 24 and a ring-shaped sampling tube 25, the ring-shaped sampling tube 25 is arranged on the lower outer side of the sampling device body 1, the layered tube comprises a fixed tube 22 and a plurality of filtering sampling tubes 23 arranged on the lower end of the fixed tube 22, the fixed tube 22 and the filtering sampling tubes 23 are communicated with each other, and the seepage tubes 21 are symmetrically arranged on the left and right sides of the fixed tube 22, the fixed tube 22 is communicated with the boost holes 211 arranged in the two seepage tubes 21 through the communication ports 221 arranged on the two sides respectively, and the two boost holes 211 are communicated with the ring-shaped sampling tube 25 through the communication pipe two 212 arranged on the lower end thereof, the upper ends of the two seepage tubes 21 are provided with the electric push rods 24, the electric push rods 24 are fixed through a 242, the output shaft of the electric push rod 24 is installed with the piston plate 241 arranged in the seepage tube 21, when the output shaft of the electric push rod 24 is contracted, the horizontal height of the piston plate 241 is higher than the horizontal height of the communication port 221;

[0045] According to the Figure 1, attached Figure 2 As shown in the drawings, the upper end of the sampling device body 1 is also provided with a connecting hook 15, and the connecting hook 15 is connected with a traction rope 100. When the sampling device in the application is used for seawater sampling, the traction rope 100 can be reeled in or out by human or equipment to lower the sampling device body 1, so that the sampling device body 1 sinks into the water. After that, negative pressure is generated by the air compressor connected with the communication pipe 1 200, so that the seawater around the inlet 12 enters the sampling cavity along the inlet 12. Because the sampling cavity is divided into inner and outer chambers by the filter plate body 14, the seawater will first flow into the outer chamber and filter the plankton or various floating impurities carried by the seawater through the filter plate body 14;

[0046] Moreover, the preliminary filtered seawater in the inner chamber is sucked into the layered pipe from the opening of the filter sampling pipe 23 at the lowermost end of the sampling pipe 2 under the action of negative pressure. The output shaft of the electric push rod 24 is in a contracted state, and the piston plate 241 thereon is lifted to a height higher than that of the communication port 221. In this way, the seawater sucked by the negative pressure can flow into the seepage pipe 21 through the communication port 221 arranged on the side of the fixed pipe 22 and finally flow into the annular sampling pipe 25 for collection.

[0047] Moreover, when the seawater sucked into the layered pipe flows through the filter sampling pipes 23 at different levels, the filter membranes 231 with different pore sizes from large to small are prearranged in the filter sampling pipes 23, so that different particle sizes and plankton samples are intercepted and left in sequence, realizing automatic hierarchical collection of the samples. At the same time, part of the seawater can be sucked by the negative pressure in the seepage pipe 21 through the communication port 221 on the side wall of the fixed pipe 22 and flow into the pressure boosting hole 211. This part of seawater is then transported to the annular sampling pipe 25 through the communication pipe 2 212. Because this part of seawater has been pretreated by the filter plate body 14 before entering the layered pipe and has not been filtered in the seepage pipe, the seawater sample collected by the annular sampling pipe 25 is subjected to preliminary filtration and can be used for water quality chemical analysis or microbial analysis.

[0048] Furthermore, the pressure boosting hole 211 is composed of pressure boosting leakage holes 1 and 2. The pressure boosting leakage hole 1 is arranged above the pressure boosting leakage hole 2, and the cross-sectional profile of the pressure boosting leakage hole 1 is the same as that of the piston plate 241. The surface area of the pressure boosting leakage hole 2 is smaller than that of the pressure boosting leakage hole 1. The pressure boosting leakage hole 2 is connected with the communication pipe 2 212, and a permeable membrane 213 is arranged at the connection end of the pressure boosting leakage hole 2 and the communication pipe 2 212.

[0049] When the output shaft of the electric push rod 24 is retracted, the piston plate 241 is lifted to a height higher than the level of the communication port 221. At this time, the preliminary filtered seawater flows into the first pressure boosting leakage hole of the pressure boosting hole 211 under the action of the main negative pressure of the sampling pipe 2, and fills the cavity. Since the piston plate 241 has been lifted, the process is smooth; then the electric push rod 24 is started, pushing the piston plate 241 to move slowly downward. Since the cross-sectional profile of the piston plate 241 perfectly matches the first pressure boosting leakage hole, it can be precisely inserted, like a "piston" inserted into a "cylinder". As the piston plate 241 continues to press down, the seawater trapped in the pressure boosting hole is compressed, the pressure rises sharply, and finally flows into the second communication pipe 212 through the permeable membrane 213, and is finally collected by the annular sampling pipe 25.

[0050] Furthermore, the lower end of the second communication pipe 212 is provided with a magnetic block 2121, and the corresponding part of the annular sampling pipe 25 is provided with a magnetic block 251, and the magnetic block 251 and the magnetic block 2121 are attracted to each other. When the magnetic block 251 and the magnetic block 2121 are attracted to each other, the second communication pipe 212 and the annular sampling pipe 25 are in communication; the side of the annular sampling pipe 25 close to the sampling device body 1 is provided with an anti-skid strip 252, which can be directly taken off from the outside of the sampling device body 1 during use.

[0051] Furthermore, each filter sampling pipe 23 is provided with a filter membrane 231 and a particle sampling plate 232, the filter membrane 231 is arranged above the particle sampling plate 232, and there is a gap between the end of the particle sampling plate 232 and the inner end of the filter sampling pipe 23, and the particle sampling plate 232 is arranged obliquely. In order to fully detect the substances, the particle sampling plate 232 can be used for collection. When seawater enters the filter sampling pipe 23, some plankton or particulate impurities will flow above the particle sampling plate 232 and slowly settle on the surface of the particle sampling plate 232. When seawater sampling is performed, the seawater in the filter sampling pipe 23 is discharged outward, and the plankton or particulate impurities remain on the surface of the particle sampling plate 232. In order to avoid seawater remaining on the particle sampling plate 232, a discharge port is arranged on the lower end surface of the particle sampling plate 232.

[0052] Furthermore, the upper end of the filter sampling pipe 23 is provided with a rotating shaft 233 and a sealing strip 234, the filter sampling pipe 23 is fixed by the rotating shaft 233, and the sealing strip 234 extends along the upper end surface of the filter sampling pipe 23.

[0053] The filter diameters of the filter membranes 231 arranged in all filter sampling pipes 23 gradually decrease from bottom to top.

[0054] The above merely describes preferred embodiments of the present application, and therefore cannot limit the scope of the present application, i.e. equivalent changes and modifications made according to the patent scope and content of the present application should still fall within the scope of the present application.

Claims

1. A multi-layer filtered marine water quality sampling device, characterized by, The sampling device body is internally provided with a sampling cavity, the sampling cavity is externally communicated through the left and right entry ports, and the sampling cavity is internally provided with a sampling tube; The sampling cavity is divided into an inner chamber and an outer chamber by a filter plate body arranged in the middle of the sampling cavity, the sampling tube is installed in the outer chamber, and the lower end of the sampling tube extends into the inner chamber through the filter plate body, the sampling tube is externally connected to an air compressor through a communication pipe arranged at the upper end of the sampling tube to generate negative pressure; The lower end of the inclined plate is rotatably installed with an intercepting plate, the surface of the lower end of the inclined plate close to the intercepting plate is provided with a limiting plate, the limiting plate is parallel to the horizontal line, and a gap exists between the limiting plate and the entry port, when the negative pressure is generated by the air compressor, the intercepting plate swings upward and draws seawater around the sampling device body through the entry port; The sampling tube comprises a layered tube, a seepage tube, an electric push rod and a ring-shaped sampling tube, the ring-shaped sampling tube is arranged on the lower outer side of the sampling device body, the layered tube comprises a fixed tube and a plurality of filter sampling tubes arranged at the lower end of the fixed tube, the fixed tube and the filter sampling tubes are in communication with each other, and the seepage tubes are symmetrically arranged on the left and right sides of the fixed tube, the fixed tube is in communication with two pressurizing holes arranged in the seepage tubes through the communication ports arranged on the two sides, and the two pressurizing holes are in communication with the ring-shaped sampling tube through the communication pipes arranged at the lower ends of the two pressurizing holes; The upper ends of the two seepage tubes are provided with electric push rods, the electric push rods are fixed, and the output shafts of the electric push rods are installed with piston plates arranged in the seepage tubes, when the output shafts of the electric push rods are contracted, the horizontal height of the piston plates is higher than the horizontal height of the communication ports.

2. A multi-layer filtered marine water quality sampling device according to claim 1, wherein, The pressurizing holes are composed of pressurizing leakage holes one and two, the pressurizing leakage hole one is arranged on the pressurizing leakage hole two, the cross-sectional profile of the pressurizing leakage hole one is the same as that of the piston plate, and the surface area of the pressurizing leakage hole two is smaller than that of the pressurizing leakage hole one; The pressurizing leakage hole two is in communication with the communication pipe two, and the pressurizing leakage hole two is provided with a permeable membrane at the connection end of the communication pipe two.

3. A multi-layer filtered marine water quality sampling device according to claim 2, wherein, The lower end of the communication pipe two is provided with a magnetic block one, and the ring-shaped sampling tube is provided with a magnetic block two corresponding to the magnetic block one, the magnetic block two and the magnetic block one are adsorbed, and when the magnetic block two and the magnetic block one are adsorbed, the communication pipe two and the ring-shaped sampling tube are in communication; The side of the ring-shaped sampling tube close to the sampling device body is provided with an anti-skid strip.

4. A multi-layer filtered marine water quality sampling device according to claim 3, wherein, Each filter sampling tube is internally provided with a filter membrane and a particulate matter sampling plate, the filter membrane is arranged above the particulate matter sampling plate, a gap exists between the end of the particulate matter sampling plate and the inner end of the filter sampling tube, and the particulate matter sampling plate is arranged in an inclined manner; The surface of the lower end of the particulate matter sampling plate is provided with a discharge port.

5. A multi-layer filtered marine water quality sampling device according to claim 4, wherein, The upper end of the filter sampling tube is provided with a rotating shaft and a sealing strip, the filter sampling tube is fixed through the rotating shaft, and the sealing strip extends along the surface of the upper end of the filter sampling tube; The filter diameters of the filter membranes arranged in all filter sampling tubes gradually decrease from bottom to top.

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