A seawater online pre-filtration device

Abstract

The invention discloses a seawater online pre-filtering device, which is used for pre-treatment of seawater nutrients and seawater heavy metal detection, and belongs to the field of marine environment monitoring and investigation. The device comprises: a liquid dispensing tube and a sampling tank arranged at a distance below the liquid dispensing tube, a filter tank is movably connected below the sampling tank, a first through hole is relatively arranged at the middle section of the side wall of the filter tank, a vacuum pump is connected to one side of the first through hole through a tube body, and a separation ring groove is movably arranged inside the filter tank. The device realizes continuous online filtration of seawater samples, effectively improves the seawater filtration efficiency, and effectively solves the problem that the traditional method is too time-consuming.

Description

Technical Field

[0001] The invention belongs to the field of marine environment monitoring and investigation, and in particular relates to a seawater online pre-filtering device. Background Art

[0002] With the development and utilization of marine resources, the marine environment system faces multiple pressures such as multi-source pollution, habitat destruction and biodiversity loss. Seawater pollution has caused the decline of fishery resources and the decline of seafood quality. Against this background, my country's seawater quality automatic monitoring technology has developed rapidly. Nutrients and heavy metals are key indicators for seawater quality monitoring, and their detection mainly adopts spectrophotometry or fluorescence method. Since seawater turbidity has a significant impact on the measurement results, the water samples need to be filtered and pre-treated according to standard specifications to remove impurities such as suspended particles to ensure the accuracy and reliability of the test results.

[0003] Publication No. US6238556B1 discloses a filtration system for filtering particulate matter from a liquid, the filtration system comprising a pre-filter device and a main filter device. The pre-filter device comprises a container having a fluid inlet, a fluid outlet and a backwash outlet, and a filter medium disposed in the container, the filter medium being capable of filtering large particulate matter from the liquid and allowing fine particulate matter to pass through. The main filter device comprises a container having a fluid inlet, a fluid outlet and a filter medium disposed in the container and capable of filtering fine particulate matter from the liquid. The fluid inlet and the fluid outlet are positioned so that the liquid flowing between them passes through the filter medium. The pump is fluidically connected between the pre-filter device and the main filter device. The pump has a suction side and a discharge side. The pre-filter control assembly and the fluid connection of the pre-filter control assembly are between the pre-filter device and the pump. The pre-filter control assembly has a normal operating setting, wherein the fluid outlet of the pre-filter device is fluidly connected to the suction side of the pump to sequentially draw liquid through the fluid inlet of the pre-filter device, and the filter medium of the pre-filter device. The pre-filter control assembly also has a backwash operation setting, wherein the fluid outlet of the pre-filter device is fluidly connected to the discharge side of the pump to force liquid to pass through the fluid outlet of the pre-filter device, the filter medium of the pre-filter device, and the fluid outlet of the pre-filter device in sequence. This patent still has room for improvement.

[0004] It should be noted that the above introduction to the technical background is only for the convenience of providing a clear and complete description of the technical solutions of the present application and for the convenience of understanding by those skilled in the art. It cannot be considered that the above technical solutions are well known to those skilled in the art simply because they are described in the background technology section of the present application. Summary of the invention

[0005] In view of the problems existing in the prior art, the present invention provides a seawater online pre-filtration device for pre-treating seawater nutrients and heavy metals. The device realizes continuous online filtration of seawater samples, effectively improves the seawater filtration efficiency, and effectively solves the problem of the traditional method being too time-consuming.

[0006] In order to solve the above technical problems, the present invention specifically provides the following technical solutions: A seawater online pre-filtration device comprises a liquid separation pipe and a sampling tank arranged at a distance below the liquid separation pipe, a filter tank is movably connected below the sampling tank, a first through hole is relatively arranged at the middle section of the side wall of the filter tank, a vacuum pump is connected to one side of the first through hole through a tube body, a separation ring groove is movably arranged inside the filter tank, the other side of the first through hole is used for connecting other sampling tanks in series to increase work efficiency, and the vacuum pump can be used to improve the filtering speed and filtering efficiency.

[0007] According to one embodiment of the present invention, the injection tank is a column sleeve body that tapers from one end to the other end, and a first injection cup and a second injection cup that cooperate with each other are arranged in one end of the column sleeve body, and a filter screen is arranged on one side of the first injection cup and the second injection cup. The liquid dispensing tube is arranged on one side above the injection tank. A circular ring body is fixedly arranged on the upper edge of the first injection cup and the second injection cup, and the diameter of the circular ring body is greater than the maximum diameter of the injection tank.

[0008] The experimental water samples of seawater quality generally contain impurities, which may be solid impurities such as plankton residues or marine garbage. The first step of pre-filtration is to filter out these impurities. When there are many impurities on the filter components such as the filter membrane of the conventional filtering device and they need to be replaced, it is usually necessary to suspend the input process of the sample water sample. After the impurities are cleaned and the filter components are reinstalled, the sample water sample can be input to continue the filtering activity. The first injection cup and the second injection cup are provided in the injection tank of the present invention. The first injection cup and the second injection cup have the same structure. The two can be combined into an injection cup of the same shape as the injection tank. The contact part and the bottom of the two injection cups are respectively provided with filter screens. The injection cup is slightly smaller than the injection tank to ensure that the two can be combined and placed in the injection tank. The annular body is provided on the top of the injection cup. The diameter of the annular body is larger than the maximum diameter of the injection tank, so that the injection cup can be overlapped on the edge of the injection tank to realize the detachable injection cup. And because the first and second injection cups are movably arranged on the injection tank, the installation angle is not fixed, so the injection cups can be rotated horizontally relative to the injection tank. In addition, this arrangement can clean the impurities in the filter without interrupting the input of the sample water sample. Specifically, the liquid dispensing tube is arranged on one side above the injection tank, just above the injection cup on one side, and the injection cup on the other side does not receive the water sample. The water sample can flow from the injection cup on the water inlet side through the filter screen into the filter tank below. When it is necessary to clean the impurities in the injection cup, it is only necessary to rotate the injection cup so that the injection cup on the other side receives the water sample. At this time, the injection cup with impurities can be taken out for cleaning, and a filter is arranged on one side of each injection cup to ensure that all water samples input into the injection cup are filtered.

[0009] According to one embodiment of the present invention, the separation annular groove is composed of a sleeved annular plate body with a separation space, and through holes are arranged in an array on the annular plate body. A first rod body is axially arranged at the center of the bottom of the filter tank, and a second rod body is fixedly arranged at the lower part of the first rod body, and the second rod body and the first rod body are arranged perpendicularly with their axes. A third rod body is arranged at the top of the first rod body, and the third rod body is perpendicular to the axis of the first rod body, and bent bodies are arranged downward at both ends of the third rod body, and the bent bodies are parallel to the first rod body. A motor is connected to the bottom end of the first rod body, and a filter tank bottom plate is arranged between the motor and the second rod body, and the filter tank bottom plate is fixedly arranged at the bottom of the filter tank. A limiting body is threadedly connected to the top end of the filter tank, and the limiting body is an annular plate structure. The diameter of the top end of the limiting body is smaller than the diameter of the bottom end of the limiting body, and the diameter of the top end of the sample injection tank is larger than the diameter of the top end of the limiting body.

[0010] The tube body extending from the vacuum pump is connected to the first through hole on the filter tank to extract the air in the filter tank and accelerate the speed at which the water sample in the sample tank enters the filter tank. When there are multiple filter tanks, the tube body on the vacuum pump is provided with tube bodies connecting each filter tank, and a tube body directly connecting several filter tanks together. A switch is provided on the tube body at one end of the vacuum pump, and a separate switch is provided between every two filter tanks to achieve the vacuum operation of a certain filter tank using the vacuum pump alone. In addition, the tube body extending from the distilled water tank is also provided with a liquid dispensing tube corresponding to the sample tank on each filter tank and a switch is provided between every two liquid dispensing tubes to achieve separate control of filtration.

[0011] The filter tank is threadedly connected to a restriction body, the top diameter of the restriction body is smaller than the bottom diameter of the restriction body, and the top diameter of the sampling tank is larger than the top diameter of the restriction body. This arrangement can ensure that the sampling tank can be movably placed in the notch on the restriction body, and because both are cylindrical structures, the installation angle requirements for the sampling tank are relatively loose. At the same time, because sample water enters the sampling tank after installation, downward pressure is always applied to the sampling tank during filtering work, which can ensure the close combination of the sampling tank and the filter tank to avoid leakage or loose sealing. After the filtering device is working, the motor under the filter tank will rotate, thereby driving the first rod body to rotate, and the second rod body and the third rod body arranged on the first rod body will rotate synchronously. The mutual coordination of the rotation of the three rod bodies will cause the water sample entering the filter tank from the sample inlet tank to rotate rapidly. This rotation will generate centrifugal force to separate the salt and other solid impurities in the water sample from the water body. Specifically: when the water flow forms a rotational motion in the filter tank, due to the different densities of the impurities and water, the impurities will be subjected to a greater centrifugal force, and will be thrown to the edge of the filter tank and deposited at the bottom, while the lighter water flow will flow upward along the central axis.

[0012] A separation ring groove is provided inside the filter tank, and the outermost side of the separation ring groove is close to the inner wall of the filter tank. The separation ring groove is composed of several annular plates with different diameters. Each annular plate is provided with an array of through holes. The diameter of the through holes can be set to decrease from the inner annular plate to the outer annular plate, or it can be set to have the same diameter of the through holes on each annular plate. Personnel can freely choose according to different needs. The specific function is: when the second rod body rotates, the centrifugal force will throw the impurities to the innermost annular plate body of the separating annular groove, and then enter the gap between the annular plates of the separating annular groove through the through holes thereon. Since each annular plate body separates the water flow between the annular plates from the substances and the water flow in the center of the filter tank, there will be a flow rate difference between the water flow between the annular plates and the water flow inside the filter tank. The flow rate of water and impurities in the annular plate body will be slower than the water flow rate at the center of the filter tank. In this way, the impurities in the central part of the water body are continuously thrown into the through holes of the annular plate body, and the impurities in the water body are collected between the annular plates, thereby realizing the separation of impurities and water body. It can also prevent the impurities in the water body newly placed in the filter tank from mixing with the impurities already existing in the filter tank in the center of the filter tank, resulting in the gradual increase in the turbidity of the internal water body, and also prevent the impurities thrown to the surroundings from mixing with the water body again.

[0013] When the diameter of the through hole of the annular plate is set to decrease from the inner annular plate to the outer annular plate, the impurities with the smallest diameter will eventually enter the outermost annular plate, and finally present the distribution of impurities passing through different apertures, which is convenient for personnel to observe the impurities more intuitively and realize the classification of impurities in the water by size. After the separation ring groove collects the impurities, it can avoid the gradual increase of impurities in the water, which causes each rod body to be continuously impacted by impurities during rotation.

[0014] The liquid outlet is arranged above the middle part of the filter tank to ensure that impurities do not flow into the liquid outlet. And because the water sample has been filtered once when entering the sample tank, there are fewer impurities entering the filter tank, and the pressure on the impurities stored in the filter tank is relatively small. The third rod body can be used to enhance the centrifugal effect of the second rod body.

[0015] The high-speed rotating water flow can also achieve uninterrupted flushing of the inner wall of the filter tank, preventing impurities such as fine particles and suspended matter from adhering to the inner wall of the filter tank.

[0016] According to one embodiment of the present invention, one end of the liquid dispensing tube is connected to a distilled water tank, and an electric water suction pump is provided on the distilled water tank.

[0017] On the one hand, the distilled water tank of the present invention can be used to store distilled water, and the distilled water can be used to spray out through a liquid separation tube to clean a sample injection tank; on the other hand, the distilled water tank can also store sample water samples, reducing the pressure on personnel to input water samples into the sample injection tank, and the electric water suction pump can realize automatic water suction and reduce the workload of personnel.

[0018] Compared with the prior art, the present invention has the following beneficial effects: This setting can clean the impurities in the filter without interrupting the input of sample water. At the same time, solid impurities and plankton remains in seawater may clog the filter components. The injection cup can effectively intercept these large particles and reduce the risk of clogging of subsequent filter units.

[0019] The mutual coordination of the rotation of the three rods will cause the water sample entering the filter tank from the sample inlet tank to rotate rapidly. This rotation will generate centrifugal force, which will separate the salt and other solid impurities in the water sample from the water body, improve the detection efficiency, reduce the viscosity of the water body, enhance the fluidity of the water body, and facilitate detection. At the same time, it will accelerate the physical process, thereby shortening the cycle and improving the detection efficiency. It can prevent the impurities in the water body newly placed in the filter tank from mixing with the impurities already existing in the filter tank in the center of the filter tank, resulting in the gradual increase in the turbidity of the internal water body, and also prevent the impurities thrown around from mixing with the water body again. When the diameter of the through hole of the annular plate body is set to decrease from the inner annular plate body to the outer annular plate body, the impurity with the smallest diameter will eventually enter the outermost annular plate body, and finally present the distribution of impurities passing through different apertures, which is convenient for personnel to observe the impurity situation more intuitively and realize the classification of impurities in the water body by size. After the separation ring groove collects the impurities, it can avoid the gradual increase of impurities in the water body, resulting in the continuous impact of impurities on each rod body during rotation. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the implementation methods of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the implementation methods or the description of the prior art. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0021] Figure 1 This is a schematic diagram of the seawater online pre-filtration device of the present invention; Figure 2 It is a schematic diagram of the sampling tank scheme of the present invention; Figure 3 It is a schematic diagram of the first sample injection cup and the second sample injection cup of the present invention; Figure 4 It is a schematic diagram of the cross-section of the filter tank of the present invention; Figure 5 This is a schematic diagram of the separation ring groove solution of the present invention; Figure 6 It is a schematic diagram of the multiple groups of distilled water tanks of the present invention.

[0022] Figure numbers: 1-vacuum pump; 2-sample injection tank; 21-first sample injection cup; 22-second sample injection cup; 23-filter; 3-filter tank; 31-first rod body; 32-second rod body; 33-third rod body; 34-motor; 35-first through hole; 36-liquid outlet; 37-limiting body; 5-separation ring groove; 6-distilled water tank; 61-electric water suction pump; 62-first control switch; 63-second control switch; 64-liquid dispensing tube; 65-third control switch. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] The following first describes the concepts involved in the present application in conjunction with the accompanying drawings. It should be noted that the following description of each concept is only to make the content of the present application easier to understand, and does not limit the scope of protection of the present application; at the same time, the embodiments and features in the embodiments of the present application can be combined with each other in the absence of conflict. The present application will be described in detail with reference to the accompanying drawings and in conjunction with the embodiments.

[0025] Embodiment 1 See attached Figure 1-Figure 5 As shown, a seawater online pre-filtration device comprises a liquid separatory tube 64 and a sample feeding tank 2 arranged at a distance below the liquid separatory tube 64, a filter tank 3 is movably connected below the sample feeding tank 2, a first through hole 35 is relatively provided at the middle section of the side wall of the filter tank 3, a vacuum pump 1 is connected to one side of the first through hole 35 through a tube body, a separation ring groove 5 is movably provided inside the filter tank 3, and the other side of the first through hole 35 is used for connecting other sample feeding tanks 2 in series to increase work efficiency, and the vacuum pump 1 can be used to improve the filtration speed and filtration efficiency.

[0026] The sample injection tank 2 is a column sleeve body that tapers from one end to the other end. A first sample injection cup 21 and a second sample injection cup 22 that cooperate with each other are arranged in one end of the column sleeve body. A filter screen 23 is arranged on one side of the first sample injection cup 21 and the second sample injection cup 22. A liquid dispensing tube 64 is arranged on one side above the sample injection tank 2. A circular ring body is fixedly arranged on the upper edge of the first sample injection cup 21 and the second sample injection cup 22, and the diameter of the circular ring body is greater than the maximum diameter of the sample injection tank 2.

[0027] The experimental water samples of seawater quality generally contain a lot of impurities, which may be solid impurities such as plankton residues or marine garbage. The first step of pre-filtration is to filter out these impurities. When there are a lot of impurities on the filter components such as the filter membrane of the conventional filtering device and they need to be replaced, it is usually necessary to suspend the input process of the sample water sample. After the impurities are cleaned and the filter components are reinstalled, the sample water sample can be input to continue the filtering activity. The first injection cup 21 and the second injection cup 22 are provided in the injection tank 2 of the present invention. The first injection cup 21 and the second injection cup 22 have the same structure. The two can be combined into an injection cup of the same shape as the injection tank 2. The contact part and the bottom of the two injection cups are respectively provided with a filter screen 23. The injection cup is slightly smaller than the injection tank 2 to ensure that the two can be combined and placed in the injection tank 2. The annular body is set on the top of the injection cup. The diameter of the annular body is larger than the maximum diameter of the injection tank 2, so that the injection cup can be overlapped on the edge of the injection tank 2, so that the injection cup can be detachable. And because the first sampling cup 21 and the second sampling cup 22 are movably arranged on the sampling tank 2, the installation angle is not fixed, so the sampling cup can be horizontally rotated relative to the sampling tank 2. In addition, this arrangement can clean the impurities in the filter screen 23 without interrupting the input of the sample water sample, specifically: the liquid separation tube 64 is arranged on one side above the sampling tank 2, just above the sampling cup on one side, and the sampling cup on the other side does not receive the water sample. The water sample can flow from the sampling cup on the water inlet side through the filter screen 23 into the filter tank 3 below. When it is necessary to clean the impurities in the sampling cup, it is only necessary to rotate the sampling cup so that the sampling cup on the other side receives the water sample. At this time, the sampling cup with impurities can be taken out for cleaning, and each sampling cup is provided with a filter screen 23 on one side to ensure that all water samples input into the sampling cup are filtered.

[0028] In addition, the pore size of the filter 23 can be selected from 201μm to 300μm. The pore size of the filter 23 can also be 201μm, 202μm, 203μm, 204μm, 205μm...210μm, 211μm, 212μm, 213μm, 214μm...260μm, 261μm, 262μm, 263μm...297μm, 298μm, 299μm, 300μm, which is used to filter larger impurities.

[0029] 50μm~59μm can also be selected, and the pore size of the filter 23 can also be 51μm, 52μm, 53μm, 54μm, 55μm, 56μm, 57μm, 58μm, which is used to filter smaller impurities.

[0030] The separation annular groove 5 is composed of a sleeved annular plate with a spaced-apart space. The annular plate is provided with through holes in an array. A first rod 31 is provided axially at the center of the bottom of the filter tank 3. A second rod 32 is fixedly provided at the lower part of the first rod 31. The second rod 32 is arranged perpendicularly to the first rod 31. A third rod 33 is provided at the top of the first rod 31. The third rod 33 is perpendicular to the axis of the first rod 31. Bends are provided downwardly at both ends of the third rod 33. The bends are parallel to the first rod 31. A motor 34 is connected to the bottom of the first rod 31. A filter tank bottom plate is provided between the motor 34 and the second rod 32. The filter tank bottom plate is fixedly provided at the bottom of the filter tank 3. A limiting body 37 is threadedly connected to the top of the filter tank 3. The limiting body 37 is an annular plate structure. The top diameter of the limiting body 37 is smaller than the bottom diameter of the limiting body 37. The top diameter of the sample inlet tank 2 is larger than the top diameter of the limiting body 37.

[0031] The tube body extending from the vacuum pump 1 is connected to the first through hole 35 on the filter tank 3 to extract the air in the filter tank 3 and accelerate the speed at which the water sample in the sample tank 2 enters the filter tank 3. When there are multiple filter tanks 3, the tube body on the vacuum pump 1 is respectively provided with tube bodies connecting each filter tank 3, and has a tube body directly connecting several filter tanks 3 together. A switch is provided on the tube body at one end of the vacuum pump 1, and a separate switch is provided between every two filter tanks 3 to achieve the vacuum operation of a certain filter tank 3 using the vacuum pump 1 alone. In addition, the tube body extending from the distilled water tank 6 is also provided with a liquid dispensing tube 64 corresponding to the sample tank 2 on each filter tank 3, and a switch is provided between every two liquid dispensing tubes 64 to achieve separate control of filtration.

[0032] The filter tank 3 is threadedly connected to a restriction body 37, and the top diameter of the restriction body 37 is smaller than the bottom diameter of the restriction body 37, and the top diameter of the sample injection tank 2 is larger than the top diameter of the restriction body 37. This arrangement can ensure that the sample injection tank can be movably placed in the notch on the restriction body 37, and because both are cylindrical structures, the installation angle requirements for the sample injection tank 2 are relatively loose. At the same time, because sample water enters the sample injection tank 2 after installation, downward pressure is always applied to the sample injection tank 2 during filtering operation, which can ensure that the sample injection tank 2 is tightly combined with the filter tank 3 to avoid leakage or loose sealing. After the filtering device is working, the motor 34 below the filter tank 3 will rotate, thereby driving the first rod body 31 to rotate, and the second rod body 32 and the third rod body 33 set on the first rod body 31 will rotate synchronously. The mutual coordination of the rotation of the three rod bodies will cause the water sample entering the filter tank 3 from the sample inlet tank 2 to rotate rapidly. This rotation will generate centrifugal force to separate the salt and other solid impurities in the water sample from the water body. Specifically: when the water flow forms a rotational motion in the filter tank 3, due to the different densities of the impurities and water, the impurities will be subjected to a greater centrifugal force, and will be thrown to the edge of the filter tank 3 and deposited at the bottom, while the lighter water flow will flow upward along the central axis.

[0033] A separation annular groove 5 is provided inside the filter tank 3, and the outermost side of the separation annular groove 5 is close to the inner wall of the filter tank 3. The separation annular groove 5 is composed of several annular plates with different diameters. Each annular plate is provided with an array of through holes. The diameter of the through holes can be set to decrease from the inner annular plate to the outer annular plate, or can be set to be the same diameter of the through holes on each annular plate. Personnel can freely choose according to different needs. The specific function is: when the second rod body 32 rotates, the centrifugal force will throw the impurities to the innermost annular plate body of the separating annular groove 5, and then enter the gap between the annular plates of the separating annular groove 5 through the through holes thereon. Since each annular plate separates the water flow between the annular plates from the substances and the water flow in the center of the filter tank 3, there will be a flow rate difference between the water flow between the annular plates and the water flow inside the filter tank 3. The flow rate of water and impurities in the annular plate bodies will be slower than the water flow rate at the center of the filter tank 3. In this way, the impurities in the central part of the water body are continuously thrown into the through holes of the annular plate bodies, and the impurities in the water body are collected between the annular plates, thereby realizing the separation of impurities and water body. It can also prevent the impurities in the water body newly placed in the filter tank 3 from mixing with the impurities already existing in the filter tank 3 in the center of the filter tank 3, resulting in the gradual increase in the turbidity of the internal water body, and also prevent the impurities thrown to the surroundings from mixing with the water body again. The partition ring groove 5 can be taken out from the upper part of the filter tank 3 for cleaning, and the limiting body 37 can also prevent the partition ring groove 5 from sliding out of the filter tank 3 in some cases, such as when the filter tank 3 is inverted.

[0034] When the diameter of the through hole of the annular plate is set to decrease from the inner annular plate to the outer annular plate, the impurities with the smallest diameter will eventually enter the outermost annular plate, and finally present the distribution of impurities passing through different apertures, which is convenient for personnel to observe the impurities more intuitively and realize the classification of impurities in the water body by size. After the separation ring groove 5 collects the impurities, it can avoid the gradual increase of impurities in the water body, which causes each rod body to be continuously impacted by the impurities during rotation and the occurrence of noise.

[0035] The liquid outlet 36 is arranged above the middle section of the filter tank 3 to ensure that impurities do not flow into the liquid outlet 36. Since the water sample has been filtered once when entering the sample tank 2, there are fewer impurities entering the filter tank 3, and the pressure on the impurities stored in the filter tank 3 is relatively small. The third rod body 33 can be used to enhance the centrifugal effect of the second rod body 32.

[0036] The high-speed rotating water flow can also realize uninterrupted flushing of the inner wall of the filter tank 3 , thereby preventing impurities such as fine particles of suspended sediment from adhering to the inner wall of the filter tank 3 .

[0037] One end of the liquid dispensing tube 64 is connected to the distilled water tank 6 , and the distilled water tank 6 is provided with an electric water suction pump 61 .

[0038] On the one hand, the distilled water tank 6 of the present invention can be used to store distilled water, and the distilled water can be used to spray out through the separatory tube 64 to clean the sample injection tank 2; on the other hand, the distilled water tank 6 can also store sample water samples to reduce the pressure on personnel to input water samples into the sample injection tank 2. The electric water suction pump 61 can realize automatic water suction and reduce the workload of personnel.

[0039] Embodiment 2 See attached Figure 6 As shown, the present invention is further optimized on the basis of the first embodiment as follows: on the water inlet pipe connected to the liquid dispensing pipe 64 of the present invention, several distilled water tanks 6 and electric water suction pumps 61 of the same structure are connected in parallel. For the sake of simplicity, the meaning of the above parallel connection is to borrow the expression method of electricity, which means that there are more than one independent water dispensing pipes on a main water pipe, and a distilled water tank 6 and an electric water suction pump 61 are respectively provided on each water dispensing pipe. When the experimental water sample is of one type or the amount of the water sample is small, only a single distilled water tank 6 can be used to complete the filtration process; but in the actual experimental process, there may be multiple types of water samples, or the water sample needs When the amount is large, the parallel filter tank 3 can ensure that multiple water samples are filtered at the same time. By opening and closing the switch arranged on the water pipeline, the filtering process of different water samples can be realized simultaneously without interfering with each other. One distilled water tank 6 can supply multiple filter tanks 3, or two distilled water tanks 6 can supply one filter tank 3 at the same time. The distilled water tank 6 can also be used to clean the filter tank 3 and other filtering equipment. In actual applications, the components of the distilled water tank 6 and the filter tank 3 can be set to multiple groups, for example, 1 group, 2 groups, 3 groups, 4 groups, 5 groups, 6 groups, 7 groups, 8 groups, 9 groups, 10 groups, 11 groups, 12 groups...

[0040] The above embodiments and / or implementation methods are only used to illustrate the preferred embodiments and / or implementation methods for realizing the technology of the present invention, and are not intended to impose any form of limitation on the implementation methods of the technology of the present invention. Any technical personnel in this field may make slight changes or modifications to other equivalent embodiments without departing from the scope of the technical means disclosed in the content of the present invention, but they should still be regarded as technologies or embodiments that are essentially the same as the present invention. This article uses specific examples to illustrate the principles and implementation methods of this application. The description of the above embodiments is only used to help understand the method and its core ideas of this application. The above are only preferred implementation methods of this application. It should be pointed out that due to the limitations of textual expression and the objective existence of infinite specific structures, ordinary technicians in this technical field can make several improvements, modifications or changes without departing from the principles of this application, and can also combine the above technical features in an appropriate manner; these improvements, modifications, changes or combinations, or the direct application of the concept and technical solution of the invention to other occasions without improvement, should be regarded as the scope of protection of this application.

Claims

1. A seawater online pre-filtration device, comprising a liquid separation tube (64) and a sample feeding tank (2) arranged at a distance below the liquid separation tube (64). Features: A filter tank (3) is movably connected to the lower portion of the sample inlet tank (2); a first through hole (35) is relatively provided at the middle portion of the side wall of the filter tank (3); a vacuum pump (1) is connected to one side of the first through hole (35) via a tube; and a separation ring groove (5) is movably provided inside the filter tank (3).

2. The seawater online pre-filtration device according to claim 1, characterized in that: The sample injection tank (2) is a column sleeve body that tapers from one end toward the other end. A first sample injection cup (21) and a second sample injection cup (22) that cooperate with each other are disposed oppositely in one end of the column sleeve body. A filter screen (23) is disposed on one side of each of the first sample injection cup (21) and the second sample injection cup (22).

3. A seawater online pre-filtration device according to claim 2, characterized in that: The liquid dispensing tube (64) is arranged on one side above the sample injection tank (2).

4. The seawater online pre-filtration device according to claim 2, characterized in that: A circular ring body is fixedly provided outwardly on the upper edges of the first sample injection cup (21) and the second sample injection cup (22), and the diameter of the circular ring body is greater than the maximum diameter of the sample injection tank (2).

5. The seawater online pre-filtration device according to claim 1, characterized in that: The separation annular groove (5) is composed of a sleeved annular plate body with a separation space, and the annular plate body is provided with through holes in an array.

6. The seawater online pre-filtration device according to claim 1, characterized in that: A first rod body (31) is axially arranged at the center of the bottom of the filter tank (3), a second rod body (32) is fixedly arranged at the lower part of the first rod body (31), and the second rod body (32) and the first rod body (31) are arranged perpendicularly to each other with their axes.

7. The seawater online pre-filtration device according to claim 6, characterized in that: A third rod (33) is provided at the top end of the first rod (31), the third rod (33) is perpendicular to the axis of the first rod (31), and bent bodies are provided downwardly at both ends of the third rod (33), the bent bodies are parallel to the first rod (31).

8. The seawater online pre-filtration device according to claim 6, characterized in that: The bottom end of the first rod body (31) is connected to a motor (34), a filter tank bottom plate is provided between the motor (34) and the second rod body (32), and the filter tank bottom plate is fixedly arranged at the bottom of the filter tank (3).

9. The seawater online pre-filtration device according to claim 1, characterized in that: A limiting body (37) is threadedly connected to the top end of the filter tank (3); the limiting body (37) is an annular plate structure; the top end diameter of the limiting body (37) is smaller than the bottom end diameter of the limiting body (37); and the top end diameter of the sample injection tank (2) is larger than the top end diameter of the limiting body (37).

10. The seawater online pre-filtration device according to claim 1, characterized in that: One end of the liquid dispensing tube (64) is connected to a distilled water tank (6), and an electric water suction pump (61) is provided on the distilled water tank (6).

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