Automatic liquid adding device for multi-connected suction filtration

Abstract

The automatic liquid adding device comprises a plurality of water filtering sets, a plurality of flow guiding sets and a connecting assembly, each water filtering set comprises a first water tank, a second water tank, a third water tank and a suction filtration cup, the first water tank, the second water tank and the third water tank are sequentially arranged from top to bottom, and the suction filtration cups are communicated with the third water tank. A water sample is injected from the first water tank, is injected into the second water tank through the first overflow pipe after the first water tank is full, is injected into the third water tank through the second overflow pipe after the second water tank is full, and the first buoy moves up and down until liquid reaches a preset liquid level; when the first buoy moves downwards to the bottom of the third water tank, the first valve and the second valve are closed, liquid in the third water tank enters the suction filtration cup, when the first buoy moves downwards to the bottom of the third water tank, the first valve and the second valve are sequentially opened, the liquid in the third water tank is automatically supplemented, automatic and continuous water injection of a water sample in the suction filtration cup is achieved, and the suction filtration efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of filtration apparatus, concretely relates to an automatic liquid feeding device for multiple filtration. BACKGROUND

[0002] In the water quality analysis process, due to the low concentration of microorganisms in water, it is usually necessary to enrich microorganisms by filtration, and the filtration device generally adopts a conventional vacuum filtration device, such as the "Combined Water Sample Continuous Filtration Device" with publication number CN220238254U, which comprises a liquid collecting container, a vacuum pump for vacuumizing the liquid collecting container, and a filter cartridge sealingly arranged on the upper part of the liquid collecting container. In this technical solution, the water samples in the first filtration cup, the second filtration cup and the third filtration cup cannot be automatically supplemented, which affects the filtration effect. SUMMARY

[0003] In view of the above problems, the utility model provides an automatic liquid feeding device for multiple filtration.

[0004] To achieve the above purpose, the present application provides an automatic liquid feeding device for multiple filtration, comprising a plurality of water filtration groups, a plurality of flow guide groups and a connecting assembly, each water filtration group comprising a first water tank, a second water tank, a third water tank and a filtration cup, the first water tank, the second water tank and the third water tank being arranged in sequence from top to bottom, and the first water tank being in communication with the second water tank, the second water tank being in communication with the third water tank, the filtration cup being in communication with the third water tank, and the filtration cup and the third water tank being at the same horizontal height, the filtration cup being provided with a first output end, and the plurality of water filtration groups being not in communication with each other; each flow guide group corresponds to one water filtration group in number, each flow guide group comprising a first overflow pipe, a second overflow pipe, a first valve, a second valve and a first float, the first overflow pipe being in communication with the first water tank and the second water tank, the second overflow pipe being in communication with the second water tank and the third water tank, the first valve being arranged between the first water tank and the second water tank, the second valve being arranged between the second water tank and the third water tank, the first float being arranged in the third water tank, and the first float being linked to the first valve and the second valve for linkage control; the connecting assembly comprises a first connecting pipeline and a second connecting pipeline, the first connecting pipeline sequentially connecting the first output ends of the plurality of filtration cups, the second connecting pipeline being in communication with the first connecting pipeline, and the second connecting pipeline being in communication with the outside.

[0005] In some embodiments, each flow guide group further comprises a first water feeding pipe in communication with the first water tank, and the first water feeding pipe is used for conveying water to the first water tank.

[0006] In some embodiments, the flow guide group further comprises a first water filling valve arranged on the first water feeding pipe.

[0007] In some embodiments, the connecting assembly further comprises a third connecting pipeline, the number of the third connecting pipeline corresponding to the number of the filter cups, each of the third connecting pipeline being used to connect the third water tank of the same water filtering group with the filter cup.

[0008] In some embodiments, each of the water guiding groups further comprises a third overflow pipe arranged in the third water tank, the third overflow pipe being used to guide water out of the third water tank when the third water tank is full.

[0009] In some embodiments, each of the water guiding groups further comprises a first overflow weir and a second overflow weir, the first overflow weir being arranged at the upper portion of the first overflow pipe, the first overflow weir having a first overflow groove in communication with the first overflow pipe; the second overflow weir being arranged at the upper portion of the second overflow pipe, the second overflow weir having a second overflow groove in communication with the second overflow pipe; each of the water guiding groups further comprises a third overflow pipe arranged in the third water tank and a third overflow weir arranged at the upper portion of the third overflow pipe, the third overflow weir having a third overflow groove in communication with the third overflow pipe.

[0010] In some embodiments, the first overflow groove has a circular or rectangular radial cross section; and / or, the second overflow groove has a circular or rectangular radial cross section; and / or, the third overflow groove has a circular or rectangular radial cross section.

[0011] In some embodiments, the control unit is electrically connected with the first valve, the second valve and the first float.

[0012] In some embodiments, the number of the water filtering groups is six, and the number of the water guiding groups is six.

[0013] In some embodiments, the first water tank and the second water tank are detachably connected; and / or, the second water tank and the third water tank are detachably connected.

[0014] Differing from the prior art, in the technical scheme, the automatic liquid adding device comprises a plurality of water filtering groups, a plurality of water guiding groups and a connecting assembly, each water filtering group comprises a first water tank, a second water tank, a third water tank and a filter cup, the first water tank, the second water tank and the third water tank are sequentially arranged from top to bottom, the filter cup is in communication with the third water tank, and the filter cup and the third water tank are arranged at the same horizontal height, in the liquid adding process, water samples are poured into the first water tank, when the first water tank is filled, the water samples are poured into the second water tank through a first overflow pipe, when the second water tank is filled, the water samples are poured into the third water tank through a second overflow pipe, the liquid in the third water tank drives a first float to move up and down until the liquid reaches a preset liquid level, then the first valve and the second valve are closed, the liquid in the third water tank enters the filter cup, when the first float moves to the bottom of the third water tank, it indicates that the liquid level in the third water tank is low, then the first valve and the second valve are sequentially opened, so that the liquid in the third water tank is automatically supplemented, thereby realizing automatic and continuous pouring of the water samples in the filter cup and improving the filtering efficiency.

[0015] The above-mentioned content related to the description of the utility model is only a summary of the technical scheme of the utility model, in order to enable those skilled in the art to more clearly understand the technical scheme of the utility model, and then can be implemented according to the content recorded in the description and drawings, and in order to enable the above-mentioned purpose and other purposes, characteristics and advantages of the utility model to be more easily understood, the following is described in combination with the specific embodiment and drawings of the utility model. BRIEF DESCRIPTION OF DRAWINGS

[0016] The drawings are only used to show the principles, implementation manners, applications, characteristics and effects of the specific embodiments and other related contents of the utility model, and cannot be considered as the limitation of the utility model.

[0017] In the drawings of the specification:

[0018] Figure 1 It is the first schematic view of the automatic liquid adding device described in the specific embodiment;

[0019] Figure 2 It is the second schematic view of the automatic liquid adding device described in the specific embodiment;

[0020] Figure 3 It is the schematic view of the water filtering group and the water guiding group described in the specific embodiment;

[0021] Figure 4 It is the first embodiment schematic view of the first overflow tank and the first water tank described in the specific embodiment;

[0022] Figure 5 It is the second embodiment schematic view of the first overflow tank and the first water tank described in the specific embodiment.

[0023] The reference signs involved in the above-mentioned drawings are explained as follows:

[0024] 1、filtering group;

[0025] 101、first water tank;

[0026] 102、second water tank;

[0027] 103、third water tank;

[0028] 104、suction cup;

[0029] 2、flow guide group;

[0030] 201、first overflow pipe;

[0031] 202、second overflow pipe;

[0032] 203、third overflow pipe;

[0033] 204、first water adding pipe;

[0034] 205、first valve;

[0035] 206、second valve;

[0036] 207、first float;

[0037] 208、first overflow weir;

[0038] 209、second overflow weir;

[0039] 210、third overflow weir;

[0040] 211、first overflow groove;

[0041] 212、second overflow groove;

[0042] 213、third overflow groove;

[0043] 3、connecting assembly;

[0044] 301、first connecting pipeline;

[0045] 302、second connecting pipeline;

[0046] 303、third connecting pipeline. DETAILED DESCRIPTION

[0047] In order to describe possible application scenarios, technical principles, specific implementation schemes, and purposes and effects of the present application in detail, the following embodiments are described in detail in combination with the accompanying drawings. The embodiments described in this paper are only used to more clearly illustrate the technical scheme of the present application, and therefore only serve as examples, and cannot limit the protection scope of the present application.

[0048] The term "embodiment" mentioned in this document means that the specific features, structures or properties described in connection with the embodiment can be included in at least one embodiment of the present application. The term "embodiment" appearing at various positions in the specification does not necessarily refer to the same embodiment, and does not particularly limit the independence or association between other embodiments. In principle, in the present application, as long as there is no technical contradiction or conflict, each technical feature mentioned in each embodiment can be combined in any way to form a corresponding implementable technical solution.

[0049] Unless otherwise defined, the meanings of the technical terms used herein are the same as those commonly understood by those skilled in the art to which the present application belongs; the use of related terms in this document is only for the purpose of describing specific embodiments, and is not intended to limit the present application.

[0050] In the description of the present application, the phrase "and / or" is a description of the logical relationship between the objects, which means that there can be three relationships, for example, A and / or B, which means that there are three cases: A exists, B exists, and A and B exist at the same time. In addition, the character " / " in this document generally represents a "or" logical relationship between the associated objects before and after.

[0051] In the present application, terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual quantity, primary or secondary, or order relationship between the entities or operations.

[0052] Without more limitations, in the present application, the use of "includes", "contains", "has" or other similar expressions in the sentence is intended to cover non-exclusive inclusion, and these expressions do not exclude the presence of other elements in the process, method or product including the described elements, so that the process, method or product including a series of elements can not only include those limited elements, but also include other elements not explicitly listed, or also include elements inherent to such process, method or product.

[0053] As the same as the understanding in the "Guidelines for Examination", in the present application, the expressions "greater than", "less than", "exceed" and the like are understood as not including the number; the expressions "above", "below", "within" and the like are understood as including the number. In addition, in the description of the embodiments of the present application, the meaning of "multiple" is more than two (including two), and similar expressions related to "multiple" are also understood in this way, for example, "multiple groups", "multiple times" and the like, unless otherwise specifically limited.

[0054] In the description of the embodiments of the utility model, the space related expressions used, such as '' center '' '' longitudinal '' '' transverse '' '' length '' '' width '' '' thickness '' '' upper '' '' lower '' '' front '' '' rear '' '' left '' '' right '' '' vertical '' '' horizontal '' '' perpendicular '' '' top '' '' bottom '' '' inner '' '' outer '' '' clockwise '' '' counterclockwise '' '' axial '' '' radial '' '' circumferential '' and the like, the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the specific embodiment or the drawing, only for the convenience of describing the specific embodiment of the utility model or for the reader to understand, and not indicate or imply that the indicated device or component must have a specific position, a specific orientation, or be constructed or operated in a specific orientation, therefore, it cannot be understood as a limitation on the embodiments of the utility model.

[0055] Unless otherwise expressly provided or limited, in the description of the embodiments of the utility model, the terms such as '' installation '' '' connection '' '' connection '' '' fixation '' '' setting '' should be understood broadly. For example, the '' connection '' can be fixed connection, or detachable connection, or integrated setting, it can be mechanical connection, or electrical connection, or communication connection, it can be direct connection, or indirect connection through intermediate medium, it can be the communication inside two elements or the interaction relationship between two elements. For the skilled in the art to which the utility model belongs, the specific meaning of the above terms in the embodiments of the utility model can be understood according to the specific circumstances.

[0056] In the prior art, there are the following water tanks:

[0057] (1) the water pump directly supplies water to the filter cup from the water tank, which has the advantages of simple equipment, but has the disadvantages that when the water level in the water tank is below a certain level, manual water replenishment is required, which consumes more labor cost, and the water replenishment opportunity is not easy to control, which is easy to cause equipment or product loss due to water shortage;

[0058] (2) water is replenished through siphon principle. For example, the utility model application CN1074290A discloses '' a solar water heating system siphon automatic water replenishing device '', wherein a throat negative pressure device is installed at one end of the hot water outlet water tank, when hot water is used, the residual gas enclosed in the water tank can be extracted to ensure that the siphon water replenishment proceeds normally. However, such water replenishing device still needs to manually extract the residual gas in the water tank.

[0059] These filter devices have the following defects in actual use:

[0060] 1) Because the position of the filter hole is fixed, the suction filtration effect of the material between the two adjacent filter holes is poor, and insufficient suction filtration will directly affect the accuracy of the detection result;

[0061] 2) In order to ensure the sealing between the filter funnel and the liquid collecting container, a sealing plug is often added between the two, which greatly increases the disassembly difficulty between the filter funnel and the liquid collecting container, and is very troublesome.

[0062] 3) The filter membrane is relatively fragile, and if the liquid level in the suction filtration cup is too high, the hydrostatic pressure is too strong, and the filter membrane will be broken.

[0063] 4) When a large amount of water needs to be added, the staff needs to be present to add water, which increases the work intensity and working time.

[0064] Please refer to Figures 1 to 5 To solve the above problems, the embodiment provides an automatic liquid adding device for multiple suction filtration, which comprises a plurality of filter water groups 1, a plurality of flow guide groups 2 and a connecting assembly 3. Each filter water group 1 comprises a first water tank 101, a second water tank 102, a third water tank 103 and a suction filtration cup 104. The first water tank 101, the second water tank 102 and the third water tank 103 are arranged in sequence from top to bottom, and the first water tank 101 is communicated with the second water tank 102, the second water tank 102 is communicated with the third water tank 103, the suction filtration cup 104 is communicated with the third water tank 103, and the suction filtration cup 104 and the third water tank 103 are arranged at the same horizontal height. The suction filtration cup 104 is provided with a first output end, and the plurality of filter water groups 1 are not communicated with each other. The flow guide group 2 corresponds to the filter water group 1 in number, and each flow guide group 2 comprises a first overflow pipe 201, a second overflow pipe 202, a first valve 205, a second valve 206 and a first float 207. The first overflow pipe 201 communicates the first water tank 101 and the second water tank 102, the second overflow pipe 202 communicates the second water tank 102 and the third water tank 103, the first valve 205 is arranged between the first water tank 101 and the second water tank 102, the second valve 206 is arranged between the second water tank 102 and the third water tank 103, and the first float 207 is arranged in the third water tank 103. The first float 207 is linked and controlled with the first valve 205 and the second valve 206. The connecting assembly 3 comprises a first connecting pipe 301 and a second connecting pipe 302. The first connecting pipe 301 communicates the first output ends of the plurality of suction filtration cups 104 in sequence, the second connecting pipe 302 is communicated with the first connecting pipe 301, and the second connecting pipe 302 is communicated with the outside.

[0065] In the embodiment, the water filtering group 1 comprises a first water tank 101, a second water tank 102 and a third water tank 103, the first water tank 101, the second water tank 102 and the third water tank 103 can be commercially available water tank containers, and the first water tank 101, the second water tank 102 and the third water tank 103 can be made of acrylic plates, which are not limited in the embodiment. The water guiding group 2 comprises a first overflow pipe 201 and a second overflow pipe 202, the upper opening of the first overflow pipe 201 protrudes out of the bottom of the first water tank 101 to a certain height, which is generally close to the top of the first water tank 101, so that the water sample can fill the first water tank 101 and then enter the second water tank 102 through the first overflow pipe 201. The lower opening of the first overflow pipe 201 penetrates the first water tank 101 and communicates with the second water tank 102, and the circumference of the first overflow pipe 201 is sealingly connected with the first water tank 101 during penetration, so as to ensure the sealing of the first water tank 101. Similarly, the connection between the second water tank 102 and the third water tank 103 is realized through the second overflow pipe 202, and the position of the second overflow pipe 202 can be understood with reference to the first overflow pipe 201. The first valve 205 is arranged at the communication position between the first water tank 101 and the second water tank 102, and the first valve 205 is not arranged on the first overflow pipe 201. The first valve 205 can be a regulating valve with regulating function, which can adjust the size of the communication cross section between the first water tank 101 and the second water tank 102, so as to adjust the flow rate of the water flow in the first water tank 101 to the second water tank 102. Similarly, the second valve 206 is arranged at the communication position between the second water tank 102 and the third water tank 103, and the second valve 206 can be understood with reference to the first valve 205. The first float 207 can be a commercially available float, which can change with the change of liquid level, and the first float 207 is linked with the first valve 205 and the second valve 206 to realize the automatic water replenishing function after the change of the water level in the third water tank 103.

[0066] The first water tank 101 is in communication with the second water tank 102. The specific communication structure has two, one is through the first overflow pipe 201, when the liquid in the first water tank 101 is full, it can be in communication with the second water tank 102, the other is through the first valve 205, when the first valve 205 is opened, the first water tank 101 is in communication with the second water tank 102. The communication time of the two communication structures is different, the first overflow pipe 201 is the communication mode of the first water tank 101 and the second water tank 102 in the water adding stage, the first valve 205 is the communication mode when the water in the first water tank 101 is used to supplement the water in the second water tank 102, that is, when the first valve 205 is used, it means that the liquid level in the first water tank 101 is lower than the first overflow pipe 201, and the first overflow pipe 201 cannot play a communication role. Similarly, the communication mode of the second water tank 102 and the third water tank 103 is the same as that of the first water tank 101 and the second water tank 102, including the communication of the second overflow pipe 202 and the communication of the second valve 206, which can be understood by referring to the communication mode of the first water tank 101 and the second water tank 102.

[0067] It should be noted that the filter group 1 is arranged from top to bottom in the first water tank 101, the second water tank 102 and the third water tank 103 during use, so that the water sample can fill the first water tank 101, the second water tank 102 and the third water tank 103 in turn under the action of gravitational potential energy during water adding. The first overflow pipe 201, the second overflow pipe 202 and the third overflow pipe 203 can ensure that the water in the first water tank 101, the second water tank 102 and the third water tank 103 reaches the preset capacity. The third water tank 103 and the filter cup 104 are on the same horizontal line, so when the third water tank 103 is in communication with the filter cup 104, the water in the third water tank 103 will first enter the filter cup 104 for filtration.

[0068] Furthermore, to achieve the automatic liquid addition function shown in this embodiment, the flow guide group 2 also includes a first float 207. The first float 207 is installed in the third water tank 103. The first float 207 changes with the liquid level in the third water tank 103. The first float 207 is linked to the first valve 205 and the second valve 206 for control. When the first float 207 reaches the bottom of the third water tank 103, it indicates that the water sample filtration in the third water tank 103 is complete. Then the first valve 205 and the second valve 206... The system automatically opens, allowing water from the first water tank 101 to flow into the second water tank 102, and then into the third water tank 103, thus automatically adding liquid to the third water tank 103. When the first float 207 reaches the preset liquid level in the third water tank 103, the first valve 205 and the second valve 206 close, stopping the addition of liquid from the first water tank 101 to the second water tank 102, and stopping the addition of liquid from the second water tank 102 to the third water tank 103. The filtration process in the filtration cup 104 continues. This process continues until the water in the first water tank 101, the second water tank 102, and the third water tank 103 has been completely filtered.

[0069] This embodiment achieves automatic replenishment of water samples in the filtration cup 104 by setting up a water filtration group 1 and a flow guiding group 2. Compared with the existing single-cup filtration or vacuum filtration, the filtration efficiency is greatly improved.

[0070] Furthermore, this embodiment also includes a connecting component 3, which includes a first connecting pipe 301 and a second connecting pipe 302. The first connecting pipe 301 is sequentially connected to the first output ends of multiple filtration cups 104. The first output end is also the opening of the filtration cup 104 for performing filtration. Water samples can flow out of the filtration cup 104 through the first output end, thereby achieving the enrichment of microorganisms within the filtration cup 104. The first connecting pipe 301 collects and discharges the water samples flowing out of the multiple filtration cups 104, and finally discharges them through the second connecting pipe 302, thus achieving the guidance of water sample flow, regulating the direction of water flow, and reducing the impact of the filtration process on the external environment.

[0071] Please see Figure 1 and Figure 2 In some embodiments, the connecting assembly 3 further includes a third connecting pipe 303, the number of which corresponds to the number of filter cups 104. Each third connecting pipe 303 is used to connect the third water tank 103 and the filter cup 104 of the same water filtration group 1. This method realizes the communication between the third water tank 103 and the filter cup 104. Optionally, a third valve can be added to the third connecting pipe 303. The third valve can enable the water in the third water tank 103 to be continuously and stably input into the filter cup 104, thereby improving the filtration effect.

[0072] Please see Figure 1 andFigure 2 In some embodiments, the number of the water filtering groups 1 is six, and the number of the water guiding groups 2 is six. Since the different water filtering groups 1 are independent of each other, the microbial enrichment function of different water samples in the six water filtering cups 104 can be realized at the same time, and the filtration efficiency is significantly improved.

[0073] In some embodiments, the first water tank 101 and the second water tank 102 are detachably connected, and / or the second water tank 102 and the third water tank 103 are detachably connected. The detachable connection can be lap joint, clamping joint, locking joint, etc., and the present embodiment is not limited thereto. Through this setting, the stacking mode of the first water tank 101, the second water tank 102, and the third water tank 103 can be reasonably set according to the quality and size of the water sample during use, for example, only the second water tank 102 and the third water tank 103 are connected, which can improve the adjustability of the whole device.

[0074] Please refer to Figure 3 In some embodiments, each water guiding group 2 further comprises a first water feeding pipe 204, which is connected with the first water tank 101, and the first water feeding pipe 204 is used for conveying water to the first water tank 101. In the present embodiment, the first water feeding pipe 204 is connected with the first water tank 101, and the first water feeding pipe 204 can guide the water sample into the first water tank 101, realizing the water feeding function of the first water tank 101.

[0075] Further, in some embodiments, the water guiding group 2 further comprises a first water feeding valve, which is arranged on the first water feeding pipe 204. The first water feeding valve can be a regulating valve or a valve with pump function, so as to draw the water sample from the first water feeding pipe 204 into the first water tank 101.

[0076] Further, in some optional embodiments, each water guiding group 2 further comprises a second water feeding pipe, which is connected with the second water tank 102, and the second water feeding pipe is used for conveying water to the second water tank 102; the water guiding group 2 further comprises a second water feeding valve, which is arranged on the second water feeding pipe. The arrangement of the second water feeding pipe can make the second water tank 102 realize independent water feeding, and when the first water tank 101 is disassembled, the automatic water feeding function of the second water tank 102 is maintained; similarly, the second water feeding valve can be understood with reference to the first water feeding valve.

[0077] Further, in some optional embodiments, each flow guide group 2 further comprises a third water feeding pipe, which is in communication with the third water tank 103, and is used to deliver water to the third water tank 103. The flow guide group 2 further comprises a third water filling valve, which is arranged on the third water feeding pipe. The third water filling valve can be understood by referring to the first water filling valve. In this way, the third water tank 103 can be continuously fed with water, which is suitable for the case that the first water tank 101 and the second water tank 102 are disassembled. The third water feeding pipe and the third water filling valve can be arranged according to actual needs.

[0078] Referring to Figure 3 In some embodiments, each flow guide group 2 further comprises a third overflow pipe 203, which is arranged in the third water tank 103, and is used to guide water outside when the third water tank 103 is full. In this embodiment, the arrangement of the third overflow pipe 203 can avoid the problem of water overflowing in the third water tank 103, and improve the use safety of the entire automatic liquid feeding device.

[0079] Referring to Figures 3 to 5 In some embodiments, each flow guide group 2 further comprises a first overflow weir 208 and a second overflow weir 209. The first overflow weir 208 is arranged at the upper portion of the first overflow pipe 201, and has a first overflow groove 211, which is in communication with the first overflow pipe 201. The second overflow weir 209 is arranged at the upper portion of the second overflow pipe 202, and has a second overflow groove 212, which is in communication with the second overflow pipe 202. Each flow guide group 2 further comprises a third overflow pipe 203 and a third overflow weir 210. The third overflow pipe 203 is arranged in the third water tank 103, and the third overflow weir 210 is arranged at the upper portion of the third overflow pipe 203, and has a third overflow groove 213, which is in communication with the third overflow pipe 203.

[0080] In this embodiment, the first overflow weir 208 can realize preliminary filtration of impurities in the water in the first water tank 101, so as to reduce the influence of impurities on the subsequent filtration step. The first overflow weir 208 is arranged at the upper portion of the first overflow pipe 201, as shown in Figure 3As shown, the first overflow weir 208 is provided with a first overflow groove 211, and the first overflow groove 211 is in communication with the first overflow pipe 201, so that the water sample first passes through the first overflow weir 208 to the first overflow groove 211, and then enters the first overflow pipe 201 through the first overflow groove 211. Similarly, the second overflow weir 209 can filter the impurities in the water sample in the second water tank 102, and the third overflow weir 210 can filter the impurities in the water sample in the third water tank 103 again, so that the influence of the impurities on the subsequent filtration step can be effectively reduced. The structure of the second overflow groove 212, the second overflow pipe 202 and the second overflow weir 209 can be understood with reference to the first overflow groove 211, the first overflow weir 208 and the first overflow pipe 201. Similarly, the structure of the third overflow groove 213, the third overflow pipe 203 and the third overflow weir 210 can be understood with reference to the first overflow groove 211, the first overflow weir 208 and the first overflow pipe 201.

[0081] Further, please refer to Figure 4 and Figure 5 In some embodiments, the radial cross section of the first overflow groove 211 is circular or rectangular; and / or, the radial cross section of the second overflow groove 212 is circular or rectangular; and / or, the radial cross section of the third overflow groove 213 is circular or rectangular. Taking the first overflow groove 211 as an example, Figure 4 The first overflow groove 211 is shown as a circular structure, which can facilitate the generation of water flow vortex of the water sample, thereby improving the flow efficiency of the water sample; Figure 5 The first overflow groove 211 is shown as a rectangular structure. Optionally, in this structure, the first overflow pipe 201 can also be a square tube structure, which expands the water flow of the first overflow pipe 201 and also improves the flow efficiency of the water sample. The second overflow groove 212 and the third overflow groove 213 can be understood with reference to the first overflow groove 211.

[0082] In some embodiments, a control unit is further included, and the control unit is electrically connected with the first valve 205, the second valve 206 and the first float 207. In this embodiment, the control unit can be an MCU chip, which is electrically connected with the first valve 205 and the second valve 206 respectively, and the control unit is also electrically connected with the first float 207, so that according to the change of the position height of the first float 207, the automatic adjustment of the first valve 205 and the second valve 206 can be realized.

[0083] Different from the prior art, in the technical scheme, the automatic liquid adding device comprises a plurality of water filtering groups 1, a plurality of water guiding groups 2 and a connecting assembly 3, each water filtering group 1 comprises a first water tank 101, a second water tank 102, a third water tank 103 and a filter cup 104, the first water tank 101, the second water tank 102 and the third water tank 103 are sequentially arranged from top to bottom, the filter cup 104 is in communication with the third water tank 103, and the filter cup 104 and the third water tank 103 are arranged at the same horizontal height, in the liquid adding process, water samples are injected from the first water tank 101, when the first water tank 101 is filled, the water samples are injected into the second water tank 102 through a first overflow pipe 201, when the second water tank 102 is filled, the water samples are injected into the third water tank 103 through a second overflow pipe 202, the liquid in the third water tank 103 drives a first float 207 to move up and down, when the liquid reaches a preset liquid level, a first valve 205 and a second valve 206 are closed, the liquid in the third water tank 103 enters the filter cup 104, when the first float 207 moves to the bottom of the third water tank 103, it indicates that the liquid level in the third water tank 103 is low, the first valve 205 and the second valve 206 are sequentially opened, the liquid in the third water tank 103 is automatically supplemented, and the water samples in the filter cup 104 are automatically and continuously injected, so that the filter efficiency is improved.

[0084] Finally, it should be noted that, although the above-mentioned embodiments have been described in the specification and drawings of the present application, this does not limit the patent protection scope of the present application. Any equivalent structure or equivalent process replacement or modification based on the essential concept of the present application, using the content described in the specification and drawings, and directly or indirectly implementing the technical solutions of the above embodiments in other related technical fields, etc., are all included in the patent protection scope of the present application.

Claims

1. An automatic liquid dosing device for multi-stage vacuum filtration, characterized in that, include: Multiple water filtration units are provided. Each water filtration unit includes a first water tank, a second water tank, a third water tank, and a filter cup. The first water tank, the second water tank, and the third water tank are arranged sequentially from top to bottom. The first water tank is connected to the second water tank, the second water tank is connected to the third water tank, and the filter cup is connected to the third water tank. The filter cup and the third water tank are placed at the same horizontal level. The filter cup is provided with a first output end. The multiple water filtration units are not connected to each other. Multiple flow guide groups are provided, with each flow guide group corresponding to a specific number of water filtration groups. Each flow guide group includes a first overflow pipe, a second overflow pipe, a first valve, a second valve, and a first float. The first overflow pipe connects the first water tank and the second water tank, and the second overflow pipe connects the second water tank and the third water tank. The first valve is located between the first water tank and the second water tank, and the second valve is located between the second water tank and the third water tank. The first float is located in the third water tank, and the first float is linked to and controlled by the first valve and the second valve. The connection assembly includes a first connection pipe and a second connection pipe. The first connection pipe is sequentially connected to the first output end of a plurality of the filter cups. The second connection pipe is connected to the first connection pipe and is connected to the outside.

2. The automatic liquid dosing device for multi-stage vacuum filtration according to claim 1, characterized in that, Each of the aforementioned flow guide groups further includes: The first water supply pipe is connected to the first water tank and is used to transport water to the first water tank.

3. The automatic liquid dosing device for multi-stage vacuum filtration according to claim 2, characterized in that, The flow guiding assembly also includes: The first water injection valve is installed on the first water supply pipe.

4. The automatic liquid dosing device for multi-stage vacuum filtration according to claim 1, characterized in that, The connection component also includes: The number of third connecting pipes corresponds to the number of the filter cups, and each third connecting pipe is used to connect the third water tank of the same water filtration group to the filter cup.

5. The automatic liquid dosing device for multi-stage vacuum filtration according to claim 1, characterized in that, Each of the aforementioned flow guide groups further includes: The third overflow pipe is installed inside the third water tank and is used to drain water to the outside when the third water tank is full.

6. The automatic liquid dosing device for multi-stage vacuum filtration according to claim 1 or 5, characterized in that, Each of the aforementioned flow guide groups further includes: A first overflow weir is disposed above the first overflow pipe. The first overflow weir has a first overflow groove, which is connected to the first overflow pipe. The second overflow weir is disposed above the second overflow pipe. The second overflow weir has a second overflow groove, which is connected to the second overflow pipe. Each of the aforementioned flow guiding groups further includes a third overflow pipe and a third overflow weir. The third overflow pipe is disposed inside the third water tank, and the third overflow weir is disposed above the third overflow pipe. The third overflow weir has a third overflow trough, and the third overflow trough is connected to the third overflow pipe.

7. The automatic liquid dosing device for multi-stage vacuum filtration according to claim 6, characterized in that, The radial cross-section of the first overflow channel is circular or rectangular; And / or, the radial cross-section of the second overflow channel is circular or rectangular; And / or, the radial cross-section of the third overflow channel is circular or rectangular.

8. The automatic liquid dosing device for multi-stage vacuum filtration according to claim 1, characterized in that, Also includes: The control unit is electrically connected to the first valve, the second valve, and the first float.

9. The automatic liquid dosing device for multi-stage vacuum filtration according to claim 1, characterized in that, The number of water filtration units is six, and the number of flow guiding units is six.

10. The automatic liquid dosing device for multi-stage vacuum filtration according to claim 1, characterized in that, The first water tank and the second water tank are detachably connected; And / or, the second water tank and the third water tank are detachably connected.

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