Automatic liquid filtering device and floating and sinking test equipment

Abstract

The utility model relates to the technical field of coal separation, in particular to an automatic liquid filtering device and floating and sinking test equipment. The device comprises at least one liquid storage barrel for storing liquid, a filter, a delivery pump and a waste liquid barrel for storing waste liquid, each liquid storage barrel, the filter and the delivery pump are sequentially communicated end to end through pipelines capable of being connected and disconnected to form a closed loop; and the waste liquid barrel is communicated with the lower part of each liquid storage barrel and / or the conveying pump through a pipeline which can be connected and disconnected. When liquid in one liquid storage barrel needs to be filtered, a closed loop formed by the liquid storage barrel, the filter and the conveying pump is connected, the conveying pump is started, and the liquid in the liquid storage barrel is filtered through the filter. According to the device provided by the invention, manual participation is not needed in the filtering process, so that the labor intensity of workers is reduced, and the filtering efficiency and the filtering effect are improved; in addition, the device can regularly and automatically run, and production of equipment cannot be affected.

Description

Technical Field

[0001] The utility model relates to the technical field of coal separation, in particular to a liquid automatic filtering device and a floating and sinking test equipment. Background Technique

[0002] The floating and sinking test of coal is a test that uses Archimedes' principle and heavy medium liquids or heavy suspensions with different relative densities to divide experimental samples into various products with different relative densities. Through the floating and sinking test, the yields and quality characteristics of different density grades can be obtained, and the washability of coal can be understood, so as to provide a technical basis for determining separation methods, process flows, and equipment requirements in the design of coal preparation plants.

[0003] Coal floating and sinking test equipment generally includes structures such as a separation tank and a density liquid barrel. Among them, the density liquid barrel stores the separation medium used for the floating and sinking test. During the test, the separation medium in the density liquid barrel is transported to the separation tank through a pipeline system. Coal samples with a density greater than the separation medium sink, and coal samples with a density less than the separation medium float. Then, the coal sinking into the separation tank is fished and sent to a desliming screen to remove magnetite powder and coal slime attached to the coal surface.

[0004] The separation medium used in the floating and sinking test is expensive and belongs to dangerous chemicals, and the treatment of waste liquid is relatively difficult, usually recycled. As the floating and sinking test progresses, the amount of coal powder mixed in the separation medium becomes higher and higher, which will affect the stability of the solution density and thus affect the test results. Existing test equipment requires manual filtering of the coal powder mixed in the separation medium with tools regularly, resulting in high manual labor intensity, low filtering efficiency, and potential safety hazards. Content of the Utility Model

[0005] The first object of the utility model is to provide a liquid automatic filtering device to solve the technical problems such as high manual labor intensity, low filtering efficiency, and potential safety hazards caused by manual regular filtering of liquids in the existing technology.

[0006] To achieve the above object, the utility model adopts the following technical solutions:

[0007] A liquid automatic filtering device includes at least one liquid storage barrel for storing liquid, a filter, a delivery pump, and a waste liquid barrel for storing waste liquid;

[0008] Each of the liquid storage barrels, the filter, and the delivery pump is connected end to end in sequence through an on-off pipeline to form a closed loop;

[0009] The inlet of the waste liquid barrel is connected to the lower part of each liquid storage barrel and / or the delivery pump through an on-off pipeline.

[0010] Further, it further includes a liquid replenishing bucket for storing liquid, and the liquid replenishing bucket is communicated with each of the liquid storage buckets through a pipeline that can be switched on and off.

[0011] Further, it further includes a clear water conveying pipeline. The inlet of the clear water conveying pipeline is communicated with a water source, and the outlet of the clear water conveying pipeline is communicated with the filter and / or each of the liquid storage buckets;

[0012] A first valve is arranged on the clear water conveying pipeline.

[0013] Further, it further includes a first confluence pipeline, and the first confluence pipeline is communicated with the filter; each of the liquid storage buckets is communicated with the first confluence pipeline through a first pipeline; the waste liquid bucket is communicated with the first confluence pipeline through a second pipeline; the outlet of the clear water conveying pipeline is communicated with the first confluence pipeline.

[0014] Further, it further includes an air break pipeline. The inlet of the air break pipeline is communicated with air, and the outlet of the air break pipeline is communicated with the delivery pump;

[0015] A second valve is arranged on the air break pipeline.

[0016] Further, it further includes a second confluence pipeline, and the second confluence pipeline is communicated with the delivery pump; each of the liquid storage buckets is communicated with the second confluence pipeline through a third pipeline; the waste liquid bucket is communicated with the second confluence pipeline through a fourth pipeline; the outlet of the air break pipeline is communicated with the second confluence pipeline.

[0017] Further, an inlet and outlet one is arranged at the lower part of each of the liquid storage buckets, and the inlet and outlet one of each of the liquid storage buckets is communicated with the inlet of the delivery pump and / or the waste liquid bucket through a pipeline that can be switched on and off;

[0018] And / or, an inlet and outlet two is arranged at the upper part of each of the liquid storage buckets, and the inlet and outlet two of each of the liquid storage buckets is communicated with the filter through a pipeline that can be switched on and off.

[0019] Further, a liquid level gauge and / or a density gauge is arranged on each of the liquid storage buckets;

[0020] A liquid level switch is arranged on the liquid replenishing bucket and / or the waste liquid bucket.

[0021] Further, the delivery pump is set as a diaphragm pump.

[0022] The second object of the present utility model is a floating and sinking test device, which includes the liquid automatic filtering device described in any one of the above.

[0023] The beneficial effects of the present utility model:

[0024] In one aspect, an embodiment of the present utility model provides a liquid automatic filtering device, which includes at least one liquid storage bucket for storing liquid, a filter, a delivery pump, and a waste liquid bucket for storing waste liquid; each liquid storage bucket, filter, and delivery pump are connected end to end in sequence through an on-off pipeline to form a closed loop; the waste liquid bucket is connected to the lower part of each liquid storage bucket and / or the delivery pump through an on-off pipeline. When it is necessary to filter the liquid in one of the liquid storage buckets, the closed loop formed by the liquid storage bucket, filter, and delivery pump is switched on, and the delivery pump is started. The delivery pump extracts the liquid from the liquid storage bucket and pumps the liquid into the filter. The liquid filtered by the filter then returns to the liquid storage bucket, and through the above process, the content of particulate impurities in the liquid is reduced. The device provided in this application does not require manual participation during the filtering process, thereby reducing the manual labor intensity and improving the filtering efficiency and filtering effect; moreover, the device can operate automatically regularly and will not affect the production of the equipment.

[0025] In another aspect, an embodiment of the present application provides a floating and sinking test equipment including the above liquid automatic filtering device; due to the addition of the above liquid automatic filtering device, the sorting medium can be automatically filtered regularly without human participation, thereby reducing the manual labor intensity and improving the filtering efficiency and filtering effect; in addition, since the staff does not need to directly contact the sorting medium, the risk of contact between people and corrosive floating and sinking liquid is avoided, and potential safety hazards are eliminated. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the specific embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0027] Figure 1 It is a schematic diagram of the system architecture of the liquid automatic filtering device provided by the embodiment of the present utility model;

[0028] Figure 2 It is a three-dimensional structure diagram of the liquid automatic filtering device provided by the embodiment of the present utility model from one angle;

[0029] Figure 3 It is a three-dimensional structure diagram of the liquid automatic filtering device provided by the embodiment of the present utility model from another angle.

[0030] ICON:

[0031] 1 - Liquid storage bucket; 11 - First inlet and outlet; 12 - Second inlet and outlet;

[0032] 2 - Filter;

[0033] 3 - Delivery pump;

[0034] 4 - Waste liquid barrel;

[0035] 5 - Supplementary liquid barrel;

[0036] 61 - Clean water delivery pipeline; 62 - First confluence pipeline; 63 - First pipeline; 64 - Second pipeline; 65 - Air switch pipeline; 66 - Second confluence pipeline; 67 - Third pipeline; 68 - Fourth pipeline;

[0037] 71 - First valve; 72 - Second valve; 73 - Third valve; 74 - Fourth valve; 75 - Fifth valve; 76 - Sixth valve; 77 - Seventh valve; 78 - Eighth valve; 79 - Ninth valve;

[0038] 8 - Liquid level gauge;

[0039] 9 - Density meter;

[0040] 10 - Liquid level switch. Specific implementation mode

[0041] Next, the technical solution of the present utility model will be clearly and completely described in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the present utility model, rather than all of them. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0042] It should be noted that in the description of the present utility model, the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation of the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0043] It should be noted that in the description of the present utility model, the terms "connection" and "installation" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or connected through an intermediate medium; it can be a mechanical connection, or an electrical connection. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0044] Existing floating and sinking test equipment requires manual filtering of pulverized coal mixed in the sorting medium at regular intervals using tools, resulting in high manual labor intensity, low filtering efficiency, and potential safety hazards.

[0045] Based on this, one embodiment of the present utility model provides a liquid automatic filtering device. Referring to Figure 1 , the device includes at least one liquid storage bucket 1 for storing liquid, a filter 2, a delivery pump 3, and a waste liquid bucket 4 for storing waste liquid;

[0046] Each liquid storage bucket 1, filter 2, and delivery pump 3 are connected end to end in sequence through an on-off pipeline to form a closed loop;

[0047] The waste liquid bucket 4 is connected to the lower part of each liquid storage bucket 1 and / or the delivery pump 3 through an on-off pipeline.

[0048] It should be noted that the number of liquid storage buckets 1 can be one or more; when the number of liquid storage buckets 1 is multiple, the multiple liquid storage buckets 1 can be used to store different types of liquids respectively, or can be used to store the same type of liquid with different concentrations respectively. The number of liquid storage buckets 1 and the liquid therein can be adaptively adjusted according to the user's usage requirements, and no limitation is made here.

[0049] It should also be noted that the waste liquid bucket 4 can be connected to the delivery pump 3. In this way, the waste liquid in the liquid storage bucket 1 can enter the waste liquid bucket 4 under the action of the delivery pump 3, thereby realizing the automatic discharge of the waste liquid in the liquid storage bucket 1. In addition, the waste liquid bucket 4 can also be directly connected to the lower part of the liquid storage bucket 1 without passing through the delivery pump 3. In this way, the waste liquid in the liquid storage bucket 1 can flow into the waste liquid bucket 4 naturally under the action of gravity. In this embodiment, the waste liquid bucket 4 is connected to the lower part of each liquid storage bucket 1 and the delivery pump 3 through an on-off pipeline.

[0050] When it is necessary to filter the liquid in one of the liquid storage buckets 1, connect the closed loop formed by the liquid storage bucket 1, the filter 2, and the delivery pump 3, and start the delivery pump 3. The delivery pump 3 extracts the liquid from the liquid storage bucket 1 and pumps the liquid into the filter 2. The liquid filtered by the filter 2 then returns to the liquid storage bucket 1, and the particulate impurity content in the liquid is reduced through the above process.

[0051] When the liquid in the liquid storage bucket 1 is too much or the liquid storage bucket 1 needs to discharge the liquid, connect the pipeline between the waste liquid bucket 4 and the lower part of the liquid storage bucket 1. The liquid to be discharged in the liquid storage bucket 1 will flow naturally to the waste liquid bucket 4 under the action of gravity; if the liquid to be discharged in the liquid storage bucket 1 cannot be completely discharged under the action of gravity, start the delivery pump 3, and pump all the liquid to be discharged in the liquid storage bucket 1 into the waste liquid bucket 4 through the delivery pump 3.

[0052] The device provided by this application does not require manual participation during the filtration process, thus reducing the labor intensity of workers and improving the filtration efficiency and effect. Moreover, this device can operate automatically at regular intervals without affecting the production of the equipment. In addition, the waste liquid bucket 4 can hold the excess or waste liquid in the liquid storage bucket 1, making the device more user-friendly. There are two working modes for discharging the excess or waste liquid in the liquid storage bucket 1, namely discharging by the self-weight of the liquid and discharging by the delivery pump 3. The working mode of discharging by the self-weight of the liquid is preferred. When the liquid cannot be completely discharged by its self-weight, the working mode of discharging by the delivery pump 3 can be selected. In this way, it can ensure that all the excess or waste liquid in the liquid storage bucket 1 can be completely discharged on the basis of energy conservation.

[0053] Another embodiment of this application provides a flotation test device including the above liquid automatic filtration device. In this flotation test device, the number of liquid storage buckets 1 is multiple, and the multiple liquid storage buckets 1 are respectively used to store sorting media with different concentrations. Due to the addition of the above liquid automatic filtration device, the sorting media can be automatically filtered regularly without human participation, thus reducing the labor intensity of workers and improving the filtration efficiency and effect. In addition, since the staff does not need to directly contact the sorting media, the risk of contact between people and corrosive flotation liquid is avoided, and potential safety hazards are eliminated.

[0054] As an optional embodiment, the delivery pump 3 is set as a diaphragm pump. The diaphragm pump separates the liquid to be transported from the piston rod and the pump cylinder by means of a diaphragm. The parts of the diaphragm in contact with the liquid are all made of corrosion-resistant materials or coated with a layer of corrosion-resistant substances, so as to improve the service life of the delivery pump 3 and be more suitable for transporting corrosive flotation liquid.

[0055] In this embodiment, the liquid automatic filtration device further includes a liquid replenishment bucket 5 for storing liquid. The liquid replenishment bucket 5 is connected to each liquid storage bucket 1 through a pipeline that can be switched on and off. Specifically, a third valve 73 is provided on the pipeline between the liquid replenishment bucket 5 and each liquid storage bucket 1. When it is necessary to replenish the liquid in a certain liquid storage bucket 1, the corresponding third valve 73 is opened, and the liquid in the liquid replenishment bucket 5 enters the liquid storage bucket 1 to automatically replenish the liquid storage bucket 1.

[0056] For the flotation test device including the above liquid automatic filtration device, the liquid replenishment bucket 5 specifically stores high-concentration sorting media. As the flotation test progresses, the sorting media in the liquid storage bucket 1 is slowly diluted. When the sorting media in a certain liquid storage bucket 1 is diluted to the set concentration, the corresponding third valve 73 is opened to replenish concentrated liquid to the liquid storage bucket 1 to increase the total amount of sorting media in the bucket.

[0057] Further, the liquid automatic filtering device further includes a clear water conveying pipeline 61. The inlet of the clear water conveying pipeline 61 is communicated with a water source, and the outlet of the clear water conveying pipeline 61 is communicated with each liquid storage barrel 1 and / or the filter 2;

[0058] A first valve 71 is arranged on the clear water conveying pipeline 61.

[0059] It should be noted that the outlet of the clear water conveying pipeline 61 can be communicated with the filter 2. In this way, the filter 2 can be backwashed by the water pressure of the clear water itself. In addition, the outlet of the clear water conveying pipeline 61 can also be communicated with each liquid storage barrel 1; in this way, on the one hand, the liquid storage barrel 1 can be washed by the water pressure of the clear water itself, and on the other hand, the liquid storage barrel 1 can be replenished with clear water. In this embodiment, the outlet of the clear water conveying pipeline 61 is communicated with both the filter 2 and each liquid storage barrel 1, and the overall design is more user-friendly, meeting the multi-functional requirements of users.

[0060] Optionally, a clear water conveying pump is arranged on the clear water conveying pipeline 61 to still realize the cleaning and water replenishing functions when the water pressure of the clear water itself is insufficient.

[0061] Continue to refer to Figure 1 The liquid automatic filtering device further includes a first confluence pipeline 62, and the first confluence pipeline 62 is communicated with the filter 2;

[0062] Each liquid storage barrel 1 is communicated with the first confluence pipeline 62 through a first pipeline 63; a fourth valve 74 is arranged on the first pipeline 63;

[0063] The waste liquid barrel 4 is communicated with the first confluence pipeline 62 through a second pipeline 64; a fifth valve 75 is arranged on the second pipeline 64;

[0064] The outlet of the clear water conveying pipeline 61 is communicated with the first confluence pipeline 62.

[0065] In the above structure, one end of each of the first pipeline 63, the second pipeline 64 and the clear water conveying pipeline 61 is respectively connected to the first confluence pipeline 62 through a multi-way joint. Through the first confluence pipeline 62, multiple pipelines can be integrated, making the overall structure of the device more concise and compact. Not only does it reduce the overall volume of the device, but also it alleviates the problem of the messy distribution of multiple pipelines and improves the aesthetics of the device.

[0066] Further, the liquid automatic filtering device further includes an air break pipeline 65. The inlet of the air break pipeline 65 is communicated with air, and the outlet of the air break pipeline 65 is communicated with the conveying pump 3;

[0067] A second valve 72 is arranged on the air break pipeline 65.

[0068] When there is residual filtrate in the filter 2, the transfer pump 3, and the related pipelines, open the second valve 72 and start the transfer pump 3. At this time, the transfer pump 3 extracts air and empties the residual filtrate in the filter 2, the transfer pump 3, and the related pipelines through air pressure. The above settings, on the one hand, avoid the loss of filtrate, and on the other hand, avoid the problem of equipment failure caused by the long-term accumulation of filtrate in the filter 2 and the transfer pump 3. In addition, when multiple types of liquids need to be filtered, emptying the pipeline before filtration can avoid the mixing of different types of liquids, thereby avoiding affecting the density of the sorting medium.

[0069] Based on the above structure, the liquid automatic filtering device further includes a second confluence pipeline 66, and the second confluence pipeline 66 is communicated with the transfer pump 3;

[0070] Each liquid storage barrel 1 is communicated with the second confluence pipeline 66 through a third pipeline 67; a sixth valve 76 is arranged on the third pipeline 67;

[0071] The waste liquid barrel 4 is communicated with the second confluence pipeline 66 through a fourth pipeline 68; a seventh valve 77 is arranged on the fourth pipeline 68;

[0072] The outlet of the air break pipeline 65 is communicated with the second confluence pipeline 66.

[0073] In the above structure, the second confluence pipeline 66 is used to integrate multiple pipelines, further reducing the overall volume of the device.

[0074] In order to minimize the liquid residue in each pipeline as much as possible, when arranging each valve, it should be as close as possible to the interface of the pipeline where it is located. For example, valves 71, 74, and 75 are as close as possible to the first confluence pipeline 62, and valves 76 and 77 are as close as possible to the second confluence pipeline 66.

[0075] Analyzing the above pipeline structure, the waste liquid barrel 4 is communicated with the outlet of the transfer pump 3. In this way, the transfer pump 3 can pump the liquid in the liquid storage barrel 1 into the waste liquid barrel 4; at the same time, the waste liquid barrel 4 is communicated with the inlet of the transfer pump 3, that is, the waste liquid barrel 4, the filter 2, and the transfer pump 3 are connected in series end to end to form a closed loop. In this way, the filter 2 can also filter the liquid in the waste liquid barrel 4.

[0076] Continue to refer to Figure 1 , an inlet / outlet 11 is provided at the lower part of each liquid storage barrel 1, and the inlet / outlet 11 of each liquid storage barrel 1 is communicated with the transfer pump 3 and / or the waste liquid barrel 4 through a pipeline that can be switched on and off;

[0077] And / or, an inlet / outlet 12 is provided at the upper part of each liquid storage barrel 1, and the inlet / outlet 12 of each liquid storage barrel 1 is communicated with the filter 2 through a pipeline that can be switched on and off.

[0078] Specifically, in this embodiment, the inlet / outlet 11 of each liquid storage bucket 1 is connected to the delivery pump 3 through the third pipeline 67 and a part of the second confluence pipeline 66; the inlet / outlet 11 of each liquid storage bucket 1 is connected to the waste liquid bucket 4 through the third pipeline 67, a part of the second confluence pipeline 66 and the fourth pipeline 68; the inlet / outlet 2 of each liquid storage bucket 1 is connected to the filter 2 through the first pipeline 63 and a part of the first confluence pipeline 62.

[0079] When the liquid in the liquid storage bucket 1 is too much or the liquid storage bucket 1 needs to discharge liquid, the inlet / outlet 11 and the waste liquid bucket 4 are connected. Since the liquid in the liquid storage bucket 1 has a large density and the liquid level is higher than that of the waste liquid bucket 4, the liquid in the liquid storage bucket 1 will naturally flow to the waste liquid bucket 4. If the liquid to be discharged in the liquid storage bucket 1 cannot be completely discharged under the action of gravity, the delivery pump 3 and the relevant valves are opened, and the liquid to be discharged in the liquid storage bucket 1 will all enter the waste liquid bucket 4 under the action of the delivery pump 3.

[0080] Further, the bottom of the filter 2 has a filter media outlet, which is connected to the sewer through a filter media discharge pipe, and an eighth valve 78 is provided on the filter media discharge pipe. The filter media filtered by the filter 2 can be directly discharged into the sewer through the filter media discharge pipe, saving the step of manually discharging the filter media.

[0081] In other embodiments, the filter media outlet at the bottom of the filter 2 can also be connected to a filter media box.

[0082] In this embodiment, a ninth valve 79 is provided on the pipeline between the filter 2 and the delivery pump 3.

[0083] In the above structure, each valve can control the on / off of the pipeline where it is located.

[0084] Continue to refer to Figure 1 , the automatic liquid filtering device provided in this embodiment includes a filtering mode, an emptying mode, a cleaning mode, a liquid supplementing mode, a liquid discharging mode and a water replenishing mode. Taking one of the liquid storage buckets 1 as an example, the working principles of the above modes are as follows:

[0085] Filtering mode: It includes a liquid storage bucket filtering mode and a waste liquid bucket filtering mode, where:

[0086] When the liquid storage bucket filtering mode is carried out, valves 74, 76 and 79 are opened, the rest of the valves are closed, and the delivery pump 3 is started; the delivery pump 3 extracts liquid from the liquid storage bucket 1 and pumps the liquid into the filter 2, and the filtered liquid returns to the liquid storage bucket 1, and the timing stops;

[0087] When the waste liquid barrel filtering mode is carried out, valves 75, 77, and 79 are opened, the remaining valves are closed, and the transfer pump 3 is started; the transfer pump 3 extracts liquid from the waste liquid barrel 4 and pumps the liquid into the filter 2, and the filtered liquid returns to the waste liquid barrel 4, and the timing stops; during the above process, the filter 2 can preliminarily process the waste liquid in the waste liquid barrel 4, reducing the subsequent processing workload of the waste liquid.

[0088] Emptying mode: If there is residual filtrate in the filter 2, the transfer pump 3, and the relevant pipelines, valves 72, 74, and 79 are opened, the remaining valves are closed, and the transfer pump 3 is started; the transfer pump 3 extracts air and makes the air flow through the transfer pump 3, the filter 2, and the relevant pipelines, so that the residual filtrate can be emptied.

[0089] Cleaning mode: The cleaning mode includes the filter cleaning mode, the liquid storage barrel cleaning mode, and the waste liquid barrel cleaning mode; among them:

[0090] When the filter cleaning mode is carried out, valves 71 and 78 are opened, the remaining valves are closed; the clear water uses its own water pressure to backwash the filter 2, and the flushing water enters the sewer; after the cleaning is completed, an emptying is carried out again;

[0091] When the liquid storage barrel cleaning mode is carried out, valves 71, 74, 76, and 77 are opened, the remaining valves are closed;

[0092] When the waste liquid barrel cleaning mode is carried out, valves 71, 75, and the drain port of the waste liquid barrel 4 are opened, and the remaining valves are closed.

[0093] Liquid supplement mode: Valve 73 is opened, and the remaining valves are closed; the high-concentration liquid stored in the liquid supplement barrel 5 is supplemented into the liquid storage barrel 1.

[0094] Drainage mode: When there is too much liquid in the liquid storage barrel 1 or the liquid storage barrel 1 needs to drain liquid, valves 76 and 77 are opened, the remaining valves are closed. The liquid in the liquid storage barrel 1 has a large density and the liquid level is higher than that of the waste liquid barrel 4. The liquid in the liquid storage barrel 1 will naturally flow to the waste liquid barrel 4 under the action of gravity; if the liquid to be drained in the liquid storage barrel 1 cannot be drained completely, then valves 75, 76, and 79 are opened, the remaining valves are closed, and the transfer pump 3 is started. The liquid to be drained in the liquid storage barrel 1 is pumped into the waste liquid barrel 4 by the transfer pump 3.

[0095] Water replenishment mode: Valves 71 and 74 are opened, the remaining valves are closed; the clear water uses its own water pressure to be supplemented into the liquid storage barrel 1.

[0096] In addition to the above working modes, the device provided in this embodiment also has other working modes, which are not listed one by one here.

[0097] Refer to Figure 2 and Figure 3 , a liquid level gauge 8 and / or a density gauge 9 are provided on each liquid storage barrel 1;

[0098] A liquid level switch 10 is provided on and / or above the liquid replenishment bucket 5 and / or the waste liquid bucket 4.

[0099] In the above structure, the liquid level and density of the liquid in the corresponding liquid storage bucket 1 can be detected in real time through the liquid level gauge 8 and the density gauge 9; through the liquid level switch 10, the liquid replenishment bucket 5 and the waste liquid bucket 4 can be replenished and drained in a timely manner. The above electrical components are paired with a PLC or other main control to realize the automatic operation of the device.

[0100] It should be noted that a liquid level switch 10 is provided at the lower part of the liquid replenishment bucket 5, and this liquid level switch 10 is triggered when the liquid level is too low, so as to be able to automatically or alarm to prompt the operator to replenish the liquid replenishment bucket 5. A liquid level switch 10 is provided at the upper part of the waste liquid bucket 4, and this liquid level switch 10 is triggered when the liquid level is too high, so as to be able to automatically or alarm to prompt the operator to drain the waste liquid bucket 4.

[0101] As an optional embodiment, the liquid replenishment bucket 5 is located above the liquid storage bucket 1. In this way, the liquid in the liquid replenishment bucket 5 can be replenished into the liquid storage bucket 1 under the action of gravity, so that the transfer pump between the two can be omitted, further simplifying the structure of the device.

[0102] As an optional embodiment, the liquid storage bucket 1 and the waste liquid bucket 4 are arranged side by side, and multiple pipelines in the device are integrally arranged on the same side of the liquid storage bucket 1 and the waste liquid bucket 4. In this way, the occupied space of the device can be minimized, and at the same time, it is also convenient for the staff to disassemble, install and repair the pipeline system.

[0103] In summary, the liquid automatic filtering device provided by the present application can automatically filter, clean, replenish liquid, drain liquid and replenish water regularly. It has the advantages of high automation degree, flexible operation, comprehensive functions, high controllability and no need for manual maintenance. At the same time, on the basis of excellent performance, it also has the advantages of compact structure and small volume, and can be applied to occasions where the installation space is limited.

[0104] Another embodiment of the present application provides a floating and sinking test device, which includes the liquid automatic filtering device described in any one of the above embodiments; in the liquid automatic filtering device, the number of the liquid storage buckets 1 is multiple, and the multiple liquid storage buckets 1 are respectively used to store sorting media with different concentrations.

[0105] This floating and sinking test device at least has all the technical effects of the above liquid automatic filtering device, which will not be elaborated here.

[0106] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A liquid automatic filtering device, characterized in that: It comprises at least one liquid storage barrel (1) for storing liquid, a filter (2), a delivery pump (3) and a waste liquid barrel (4) for storing waste liquid; Each of the liquid storage barrels (1), the filter (2) and the delivery pump (3) are connected end to end in sequence via a pipeline that can be switched on and off to form a closed loop; The waste liquid barrel (4) is connected to the lower part of each liquid storage barrel (1) and / or the delivery pump (3) through a pipeline that can be opened and closed.

2. The automatic liquid filtering device according to claim 1, characterized in that: It also comprises a liquid replenishing barrel (5) for storing liquid, wherein the liquid replenishing barrel (5) is connected to each of the liquid storage barrels (1) via a pipeline that can be opened and closed.

3. The automatic liquid filtering device according to claim 1, characterized in that: It also comprises a clean water delivery pipeline (61), the inlet of the clean water delivery pipeline (61) is connected to a water source, and the outlet of the clean water delivery pipeline (61) is connected to each of the liquid storage barrels (1) and / or the filter (2); The clean water delivery pipeline (61) is provided with a first valve (71).

4. The automatic liquid filtering device according to claim 3, characterized in that: It also comprises a confluence pipe (62), the confluence pipe (62) being in communication with the filter (2); each of the liquid storage barrels (1) being in communication with the confluence pipe (62) via a first pipe (63); the waste liquid barrel (4) being in communication with the confluence pipe (62) via a second pipe (64); and the outlet of the clean water delivery pipe (61) being in communication with the confluence pipe (62).

5. The automatic liquid filtering device according to claim 1, characterized in that: It also includes an open air pipeline (65), the inlet of the open air pipeline (65) is connected to the air, and the outlet of the open air pipeline (65) is connected to the delivery pump (3); The open pipe (65) is provided with a second valve (72).

6. The automatic liquid filtering device according to claim 5, characterized in that: It also includes a second confluence pipe (66), the second confluence pipe (66) being connected to the delivery pump (3); each of the liquid storage barrels (1) being connected to the second confluence pipe (66) via a third pipe (67); the waste liquid barrel (4) being connected to the second confluence pipe (66) via a fourth pipe (68); and the outlet of the open pipe (65) being connected to the second confluence pipe (66).

7. The automatic liquid filtering device according to claim 1, characterized in that: An inlet and outlet (11) is provided at the bottom of each of the liquid storage barrels (1), and the inlet and outlet (11) of each of the liquid storage barrels (1) is connected to the delivery pump (3) and / or the waste liquid barrel (4) through a pipeline that can be opened and closed; And / or, the upper portion of each of the liquid storage barrels (1) is provided with a second inlet and outlet (12), and the second inlet and outlet (12) of each of the liquid storage barrels (1) is connected to the filter (2) via a pipeline that can be opened and closed.

8. The automatic liquid filtering device according to claim 2, characterized in that: Each of the liquid storage barrels (1) is provided with a liquid level meter (8) and / or a density meter (9); A liquid level switch (10) is provided on the liquid replenishing barrel (5) and / or the waste liquid barrel (4).

9. The automatic liquid filtering device according to claim 1, characterized in that: The delivery pump (3) is configured as a diaphragm pump.

10. A floating and sinking test device, characterized in that: It comprises the automatic liquid filtering device as described in any one of claims 1 to 9.

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