Positive pressure filtering device and experimental equipment

Abstract

The utility model discloses a positive pressure filtering device and experimental equipment, the positive pressure filtering device comprises a supporting assembly, a funnel assembly, a sealing assembly and a pressurizing assembly, the funnel assembly is placed on the supporting assembly, the funnel assembly comprises a funnel and a filter screen, the funnel is provided with a containing cavity, the filter screen is contained in the containing cavity and connected with the funnel, and the containing cavity is divided into a first cavity and a second cavity; the sealing assembly is movably connected with the supporting assembly, the sealing assembly is used for sealing the first cavity and provided with an air inlet hole, and the air inlet hole communicates with the first cavity; the pressurizing assembly is communicated with the air inlet hole and is used for pressurizing a sample in the first cavity, so that at least part of the sample enters the second cavity through the filter screen, and the second cavity is used for being communicated with a liquid receiving bottle. The positive pressure filtering device is good in filtering effect, the filtering efficiency is improved, and the automation degree is high.

Description

Technical Field

[0001] The utility model relates to the technical field of experimental equipment, in particular to a positive pressure filtering device and experimental equipment. Background Art

[0002] Filtration is a common separation technology. Its basic principle is to use a medium to filter out impurities in the liquid. Through the driving force or other external force, the liquid (or gas) in the suspension (or gas containing solid particles) passes through the medium, while the solid particles and other substances are retained by the filter medium, thereby achieving the separation of solids and other substances from the liquid (or gas).

[0003] Existing filtration technology typically relies on gravity to filter the target material under atmospheric pressure. This method is inefficient and unreliable, often failing to fully filter the target material by relying solely on gravity, and requires a high level of operator proficiency. Utility Model Content

[0004] The purpose of the utility model is to provide a positive pressure filtering device and experimental equipment, which can improve the filtering efficiency and the degree of automation.

[0005] In order to achieve the purpose of the present invention, the present invention provides the following technical solutions:

[0006] In the first aspect, the utility model provides a positive pressure filtering device, including a support assembly, a funnel assembly, a sealing assembly and a pressurizing assembly, wherein the funnel assembly is placed on the support assembly, the funnel assembly includes a funnel and a filter screen, the funnel has a receiving chamber, the filter screen is received in the receiving chamber and connected to the funnel, and separates the receiving chamber into a first chamber and a second chamber; the sealing assembly is movably connected to the support assembly, the sealing assembly is used to seal the first chamber, the sealing assembly is provided with an air inlet, and the air inlet is connected to the first chamber; the pressurizing assembly is connected to the air inlet, and the pressurizing assembly is used to pressurize the sample in the first chamber so that at least part of the sample passes through the filter screen into the second chamber, and the second chamber is used to be connected to a liquid receiving bottle.

[0007] In one embodiment, the funnel includes a funnel body and a accommodating cylinder, the funnel body and the accommodating cylinder are detachably connected, the filter is arranged between the funnel body and the accommodating cylinder, the accommodating cylinder has the first cavity, and the funnel body has the second cavity.

[0008] In one embodiment, a first annular protrusion is provided on the outer circumference of one end of the accommodating cylinder facing the funnel body, and a second annular protrusion is provided on the end of the funnel body facing the accommodating cylinder, and the outer circumference of the first annular protrusion is in close contact with the inner circumference of the second annular protrusion.

[0009] In one embodiment, the support assembly includes a bracket and a support plate, the support plate is connected to the bracket, the funnel assembly is placed on the support plate, and the sealing assembly is movably connected to the bracket; the support plate is provided with a mounting groove, the mounting groove extends from the surface of the support plate facing away from the bracket toward the bracket, and the mounting groove is used to accommodate at least a portion of the funnel body.

[0010] In one embodiment, the sealing assembly includes a pressing plate and a sealing member, wherein the sealing member is provided on a side of the pressing plate facing the funnel, and the pressing plate is movably connected to the bracket;

[0011] When the sealing assembly is in the compressed position, the sealing member elastically abuts against the funnel.

[0012] In one embodiment, the pressure plate includes a first sub-plate and a second sub-plate connected to each other, an angle is formed between the first sub-plate and the second sub-plate, the seal is arranged on the first sub-plate, the second sub-plate is movably connected to the bracket, the air inlet hole passes through the first sub-plate and the seal, and in the orthographic projection of the funnel on the first sub-plate, the accommodating cylinder is located inside the seal.

[0013] In one embodiment, the positive pressure filtration device also includes a driving member and a transmission member, the transmission member is arranged on the bracket, the pressure plate is connected to the transmission member, the driving member is in transmission connection with the transmission member, and is used to drive the pressure plate to move relative to the bracket to drive the sealing assembly to move relative to the funnel assembly.

[0014] In one embodiment, the sealing assembly further includes a connecting member, a pressing member, a guide column and an elastic member, the connecting member is movably connected to the pressure plate and connected to the transmission member, the pressing member is fixedly connected to the connecting member and has a gap with the pressure plate, one of the pressure plate and the pressing member is fixedly connected to one end of the guide column, and the other is slidably connected to the other end of the guide column, the elastic member is arranged around the guide column, and one end of the elastic member elastically abuts against the pressing member, and the other end elastically abuts against the pressure plate.

[0015] In one embodiment, the support assembly further includes a positioning plate and a base plate arranged at intervals, the positioning plate and the base plate are both connected to the bracket, and the positioning plate is located between the base plate and the support plate, the positioning plate is provided with a limiting groove, and the limiting groove is used to limit and fix the liquid receiving bottle; the positive pressure filtration device further includes a buffer component, the buffer component is provided on the surface of the base plate facing the positioning plate, and the liquid receiving bottle is placed on the buffer component.

[0016] In one embodiment, the positive pressure filtration device further includes a liquid leakage prevention tray, which is arranged below the funnel assembly; the liquid leakage prevention tray is provided with a drain connector, which is used to connect to a waste liquid bucket to drain the sample collected in the liquid leakage prevention tray.

[0017] In one embodiment, the pressurizing assembly includes an air source and an air inlet connector, wherein the air inlet connector is cooperatively connected to the air inlet hole, and the air source is connected to the air inlet hole through the air inlet connector and is used to pressurize the sample in the first cavity;

[0018] The pressurizing component also includes a pressure regulating valve, which is connected to the gas source and the gas inlet connector and is used to adjust the air pressure in the first chamber; and / or, the pressurizing component also includes a throttle valve, which is connected to the gas source and the gas inlet connector and is used to adjust the speed at which the gas enters the first chamber; and / or, the pressurizing component also includes a pressure gauge, which is connected to the gas inlet connector and is used to detect the air pressure in the first chamber.

[0019] In a second aspect, the present invention further provides an experimental device, comprising a liquid receiving bottle and a positive pressure filtration device as described in any one of the various embodiments of the first aspect, wherein the liquid receiving bottle is connected to the second cavity and is used to receive the sample in the second cavity.

[0020] In one embodiment, the experimental equipment further includes a transport device, which is used to take and place the funnel assembly and / or the liquid receiving bottle on the positive pressure filtration device, and the transport device is also used to pour the sample to be filtered into the funnel assembly.

[0021] By setting up a funnel assembly, a sealing assembly and a pressurizing assembly, when the funnel assembly is working, the sealing assembly and the pressurizing assembly work together to form a positive pressure in the first chamber of the funnel, so that at least part of the sample passes through the filter screen into the second chamber, completing the filtration of the sample, with good filtration effect, improved filtration efficiency, and a high degree of automation. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] 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 use in the implementation methods or the description of the prior art. Obviously, the drawings described below are only some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0023] Figure 1 is a perspective view of an experimental device according to an embodiment;

[0024] Figure 2is a perspective view of an experimental device according to an embodiment from another perspective;

[0025] Figure 3 is a cross-sectional view of a funnel assembly according to an embodiment;

[0026] Figure 4 This is a partial enlarged view of point A of an experimental device of an embodiment.

[0027] Description of reference numerals:

[0028] 1000-Experimental equipment;

[0029] 100-positive pressure filtration device;

[0030] 10-support assembly, 11-bracket, 111-connecting plate, 112-slide groove, 12-support plate, 121-mounting groove, 122-side plate, 13-positioning plate, 131-limiting groove, 14-bottom plate;

[0031] 20 - funnel assembly, 21 - funnel, 211 - first cavity, 212 - second cavity, 213 - funnel body, 2131 - cone, 2132 - conduit, 214 - accommodating cylinder, 215 - first annular protrusion, 216 - second annular protrusion, 22 - filter screen;

[0032] 30 - sealing assembly, 31 - air inlet, 32 - pressure plate, 321 - first sub-plate, 322 - second sub-plate, 33 - sealing member, 34 - connecting member, 35 - pressing member, 36 - guide column, 37 - elastic member;

[0033] 40- pressurizing assembly, 41- air inlet pipe, 42- air inlet connector, 43- pressure regulating valve, 44- throttle valve;

[0034] 51-driving part, 52-transmission part, 521-screw rod, 53-buffer, 54-leakage prevention plate, 55-drain connector;

[0035] 200-Liquid receiving bottle. DETAILED DESCRIPTION

[0036] 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 embodiments described 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 making creative efforts are within the scope of protection of the present invention.

[0037] It should be noted that when a component is referred to as being "fixed to" another component, it may be directly on the other component or there may be an intermediate component. When a component is referred to as being "connected to" another component, it may be directly connected to the other component or there may be an intermediate component.

[0038] Unless otherwise defined, all technical and scientific terms used in this utility model have the same meanings as commonly understood by those skilled in the art to which this utility model belongs. The terms used in the specification of this utility model are only for the purpose of describing specific embodiments and are not intended to limit this utility model. The term "and / or" used in this utility model includes any and all combinations of one or more of the relevant listed items.

[0039] The following embodiments of the present invention are described in detail with reference to the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments may be combined with each other.

[0040] Please refer to Figure 1 、 Figure 2 and Figure 3 The present invention provides a positive pressure filtration device 100, comprising a support assembly 10, a funnel assembly 20, a sealing assembly 30, and a pressurizing assembly 40. The funnel assembly 20 is placed on the support assembly 10 and comprises a funnel 21 and a filter screen 22. The funnel 21 has a receiving cavity. The filter screen 22 is received in the receiving cavity and connected to the funnel 21, dividing the receiving cavity into a first cavity 211 and a second cavity 212.

[0041] The funnel 21 and filter screen 22 can be any suitable funnel 21 or filter screen 22 known in the art, without limitation. The filter screen 22 and the funnel 21 can be connected by welding, bonding, snapping, screwing, riveting, or the like, without limitation. Optionally, both the funnel 21 and filter screen 22 can be made of stainless steel, which is corrosion-resistant, unbreakable, and reusable, thereby improving reliability and reducing costs.

[0042] The funnel assembly 20 is detachably connected to the support assembly 10. Optionally, when the funnel assembly 20 is placed on the support assembly 10, the funnel 21 can be fixed to the support assembly 10 by means of a snap connection, a screw connection, or the like to prevent the funnel assembly 20 from shaking during the filtration process. When the funnel assembly 20 needs to be removed, the funnel 21 is separated from the support assembly 10, and the funnel 21 and the filter screen 22 can be replaced.

[0043] The sealing assembly 30 is movably connected to the support assembly 10 and is used to seal the first chamber 211. The sealing assembly 30 defines an air inlet 31, which communicates with the first chamber 211. The pressurizing assembly 40 is in communication with the air inlet 31 and is used to pressurize the sample in the first chamber 211, so that at least a portion of the sample passes through the filter 22 and enters the second chamber 212. The second chamber 212 is connected to the liquid receiving bottle 200.

[0044] Optionally, the first chamber 211 has an opening facing away from the filter screen 22. Before filtering, the sample to be filtered can be injected into the funnel 21 through the opening of the first chamber 211. During filtering, the sealing assembly 30 closes the opening of the first chamber 211 to increase the air pressure in the first chamber 211 by inputting compressed gas into the first chamber 211.

[0045] The movable connection between the sealing assembly 30 and the support assembly 10 can be a sliding connection, a rotating connection, etc., without limitation. The shape, size and number of the air inlet 31 are not limited. Optionally, the air inlet 31 is substantially opened at the center of the sealing assembly 30.

[0046] The pressurizing assembly 40 includes an air source (not shown) and an air inlet connector 42 . The air inlet connector 42 is connected to the air inlet hole 31 . The air source is connected to the air inlet hole 31 through the air inlet connector 42 and is used to pressurize the sample in the first cavity 211 .

[0047] The gas source can be a gas storage tank, an air compressor, a gas booster pump, or any other suitable device in the art that can provide compressed gas, without limitation. Alternatively, the gas provided by the gas source can be nitrogen or an inert gas that is not susceptible to reaction with the sample, such as helium, neon, argon, or a mixture of any of these, without limitation.

[0048] Optional, such as Figure 1 As shown, the air source is connected to the air inlet connector 42 through the air inlet pipe 41.

[0049] The connection between the air inlet connector 42 and the air inlet hole 31 can be a snap connection, a screw connection, etc., without limitation. The specific structure of the air inlet connector 42 can refer to the air inlet connector 42 commonly used in the art, and will not be repeated here.

[0050] As a common separation technology, filtration is based on the principle of using a medium to filter out impurities in a liquid. Through the action of a driving force or other external force, the liquid (or gas) in the suspension (or gas containing solid particles) passes through the medium, while the solid particles and other substances are retained by the filter medium, thereby achieving the separation of solids and other substances from the liquid (or gas). In laboratory scenarios, the most common method is normal pressure filtration using filter paper as the filter medium. The target object to be filtered is manually poured into a glass funnel with filter paper, and then the target object is filtered by gravity. This method is inefficient and unreliable. It often fails to filter completely due to gravity alone (filter paper clogging) or filter paper damage. It requires a high level of operator proficiency, has certain restrictions on the concentration of the target object to be filtered, and cannot be automatically integrated.

[0051] The working process of the positive pressure filtration device 100 in the embodiment of the present invention is as follows: before the positive pressure filtration device 100 is put into operation, the funnel assembly 20 and the liquid receiving bottle 200 are placed on the support assembly 10 by manual or robotic means, and the liquid receiving bottle 200 is connected to the second cavity 212 of the funnel 21. Then, the sample to be filtered is injected into the receiving cavity of the funnel 21. The injected sample is blocked by the filter screen 22 and received in the first cavity 211. At this time, there is a gap between the sealing assembly 30 and the funnel assembly 20, which facilitates the injection of the sample. Then, the sealing assembly 30 is driven to move relative to the support assembly 10 so that the sealing assembly 30 abuts against the funnel 21 and closes the first cavity 211, and the pressurizing assembly 40 is connected to the air inlet 31 to complete the sealing of the funnel assembly 20. During operation, the positive pressure filtration device 100 injects compressed gas into the first chamber 211, increasing the pressure within the first chamber 211 to greater than atmospheric pressure. This allows at least a portion of the sample to pass through the filter 22 and into the second chamber 212, achieving sample separation. After filtration is complete, the funnel 21 and liquid collection bottle 200 are removed manually or robotically, completing the positive pressure filtration device 100's operation. The movement of the funnel assembly 20, sealing assembly 30, and liquid collection bottle 200, as well as the operation of the pressurizing assembly 40, are all automatically performed by automated program-controlled machinery, resulting in a high degree of automation.

[0052] The positive pressure filtering device 100 in the embodiment of the present invention is provided with a funnel assembly 20, a sealing assembly 30 and a pressurizing assembly 40. When the funnel assembly 20 is working, the sealing assembly 30 and the pressurizing assembly 40 work together to form a positive pressure in the first cavity 211 of the funnel 21, so that at least part of the sample passes through the filter 22 into the second cavity 212, completing the filtration of the sample, with good filtration effect, which can improve the filtration efficiency and high degree of automation.

[0053] In one embodiment, reference Figure 3The funnel 21 also includes a funnel body 213 and a accommodating cylinder 214. The funnel body 213 and the accommodating cylinder 214 are detachably connected. The filter 22 is arranged between the funnel body 213 and the accommodating cylinder 214. The accommodating cylinder 214 has a first cavity 211, and the funnel body 213 has a second cavity 212.

[0054] Optionally, the funnel body 213 includes a cone 2131 and a conduit 2132. The conduit 2132 is connected to one end of the cone 2131. The end of the conduit 2132 away from the cone 2131 is used to communicate with the liquid receiving bottle 200 and to discharge the sample. The end of the cone 2131 away from the conduit 2132 is connected to the accommodating cylinder 214. The cone 2131 is flared from the end where the cone 2131 connects to the conduit 2132 to the end where the cone 2131 connects to the accommodating cylinder 214.

[0055] Optionally, the opening at one end of the cone 2131 connected to the accommodating tube 214 is roughly circular, the cross-section of the accommodating tube 214 is also roughly circular, and the outer diameter of the accommodating tube 214 is smaller than the inner diameter of the cone 2131, so as to prevent the sample contained in the first cavity 211 from leaking out of the gap between the accommodating tube 214 and the funnel body 213.

[0056] The connection between the funnel body 213 and the accommodating cylinder 214 can be by a snap connection, a screw connection, or the like, without limitation. A first cavity 211 is formed between the accommodating cylinder 214 and the filter screen 22, and a second cavity 212 is formed between the funnel body 213 and the filter screen 22. The filter screen 22 can be connected to the accommodating cylinder 214 and / or the funnel body 213 by bonding, snap connection, screw connection, riveting, or the like. Alternatively, the filter screen 22 can be sandwiched between the accommodating cylinder 214 and the funnel body 213 and secured by the extrusion force between the accommodating cylinder 214 and the funnel body 213.

[0057] When the pressurizing assembly 40 is not applying pressure to the first chamber 211, the unfiltered sample is contained within the first chamber 211. When the pressurizing assembly 40 applies pressure to the first chamber 211, the liquid (or gas) in the sample passes through the filter 22 under the action of the air pressure and enters the second chamber 212, while solid particles and other matter are trapped by the filter 22 in the first chamber 211, thereby separating the solids and other matter from the liquid (or gas). After filtration is complete, the funnel body 213 and the container 214 can be separated for easy cleaning and reuse.

[0058] By setting the funnel 21 to include a detachable funnel body 213 and a receiving tube 214, the filter screen 22 is set between the funnel body 213 and the receiving tube 214. After the filtration is completed, the funnel body 213, the receiving tube 214 and the filter screen 22 can be detached for easy cleaning and reuse.

[0059] In one embodiment, Figure 3As shown, a first annular protrusion 215 is provided on the outer circumference of one end of the accommodating cylinder 214 facing the funnel body 213, and a second annular protrusion 216 is provided on the end of the funnel body 213 facing the accommodating cylinder 214. The outer circumference of the first annular protrusion 215 is in close contact with the inner circumference of the second annular protrusion 216.

[0060] Optionally, the first annular protrusion 215 and the second annular protrusion 216 are concentrically arranged in an annular shape, and at least a portion of the filter screen 22 is sandwiched between the first annular protrusion 215 and the funnel body 213. Optionally, the outer circumferential surface of the first annular protrusion 215 can be provided with an external thread, and the inner circumferential surface of the second annular protrusion 216 can be provided with an internal thread, and the external thread and the internal thread cooperate to threadably connect the funnel body 213 and the accommodating cylinder 214.

[0061] Optionally, the funnel 21 further includes a sealing ring (not shown) disposed between the outer circumferential surface of the first annular protrusion 215 and the inner circumferential surface of the second annular protrusion 216. The sealing ring is used to seal the gap between the first annular protrusion 215 and the second annular protrusion 216 to prevent the sample from flowing out of the gap between the first annular protrusion 215 and the second annular protrusion 216. The sealing ring can be any suitable sealing ring in the art without limitation.

[0062] By arranging the outer circumference of the first annular protrusion 215 of the accommodating cylinder 214 to be in close contact with the inner circumference of the second annular protrusion 216, the sealing between the accommodating cylinder 214 and the funnel body 213 is improved, which can enhance the pressurization effect and further improve the filtering efficiency.

[0063] In one embodiment, Figure 1 and Figure 2 As shown, the support assembly 10 includes a bracket 11 and a support plate 12 , the support plate 12 is connected to the bracket 11 , the funnel assembly 20 is placed on the support plate 12 , and the sealing assembly 30 is movably connected to the bracket 11 .

[0064] The support assembly 10 can be an integrated structure, that is, the bracket 11 and the support plate 12 are an integrated structure made by an integrated molding process, and the integrated molding process can be specifically stamping, casting, etc., without limitation. The support assembly 10 can also be a split structure, and the bracket 11 and the support plate 12 can be connected and fixed by welding, bonding, clamping, screwing, riveting, etc. The bracket 11 and the support plate 12 can also be movable connections, such as sliding connections, rotating connections, etc. The bracket 11 can be a box-type structure formed by splicing multiple plates (such as Figure 1 As shown), it can also be a frame structure formed by multiple plates, or it can be just a single plate, without specific limitation.

[0065] Optionally, the bracket 11 includes a connecting plate 111 , the support plate 12 is connected to the connecting plate 111 , and the sealing assembly 30 is movably connected to the connecting plate 111 .

[0066] The support plate 12 may be shaped like a square, rectangle, trapezoid, triangle, semicircle, etc., without limitation. The support plate 12 defines a mounting slot 121 extending from a surface of the support plate 12 facing away from the bracket 11 toward the bracket 11. The mounting slot 121 is configured to receive at least a portion of the funnel body 213.

[0067] Optionally, the sidewalls of the mounting groove 121 enclose a shape that is approximately circular, and in the orthographic projection of the support plate 12, the mounting groove 121 is located inside the funnel body 213, that is, when the funnel 21 is placed on the support plate 12, it will not slide out of the mounting groove 121. Optionally, when the funnel 21 is placed on the support plate 12, the second annular protrusion 216 on the funnel body 213 is engaged with the upper surface of the support plate 12, and at least a portion of the conduit 2132 of the funnel body 213 is located below the support plate 12.

[0068] Optionally, the opening of the mounting groove 121 is located on the surface of the support plate 12 facing away from the bracket 11, and the size of the opening of the mounting groove 121 is larger than the outer diameter of the conduit 2132 of the funnel 21. When placing or removing the funnel 21, the conduit 2132 of the funnel body 213 does not need to pass over the support plate 12, which effectively prevents residual liquid in the conduit 2132 from dripping onto the support plate 12 and contaminating the device.

[0069] Optionally, the support plate 12 and the connecting plate 111 are also connected by two side plates 122 that are opposite to each other and spaced apart. The side plates 122 are connected to the surface of the connecting plate 111 facing the support plate 12 and the surface of the support plate 12 facing the sealing assembly 30, which can enhance the connection strength between the support plate 12 and the connecting plate 111 and improve the load-bearing capacity of the support plate 12.

[0070] By providing the support assembly 10 including the bracket 11 and the support plate 12, the funnel assembly 20 is placed on the support plate 12, and the conduit 2132 of the funnel body 213 can enter and exit from the opening of the mounting groove 121. When placing or removing the funnel 21, the conduit 2132 of the funnel body 213 does not need to pass over the support plate 12, thereby preventing the sample remaining in the funnel body 213 from dripping onto the support plate 12 when the funnel 21 is removed, which can effectively prevent the device from being contaminated and improve the service life of the device.

[0071] In one embodiment, Figure 1 and Figure 4 As shown, the sealing assembly 30 includes a pressure plate 32 and a sealing member 33. The sealing member 33 is disposed on the side of the pressure plate 32 facing the funnel 21. The pressure plate 32 is movably connected to the bracket 11. The air inlet 31 passes through the pressure plate 32 and the sealing member 33, which can both seal the funnel 21 and pressurize the funnel 21.

[0072] The seal 33 is connected to the surface of the pressure plate 32 facing the funnel 21. The connection method can be adhesive, clamping, screwing, etc., without limitation. Optionally, the seal 33 can be in the form of a sheet, ring, or block. The material of the seal 33 can be nitrile rubber, silicone rubber, fluororubber, polyurethane rubber, etc., without limitation.

[0073] When not filtering, a gap exists between the sealing assembly 30 and the funnel assembly 20, facilitating access to the funnel 21 and the injection of the sample to be filtered into the funnel 21. When the sealing assembly 30 is in the compressed position, the sealing member 33 elastically abuts against the receiving tube 214 of the funnel 21. The sealing member 33 seals the opening of the first chamber 211 of the funnel 21, enhancing the sealing effect.

[0074] By setting the sealing assembly 30 to include a pressure plate 32 and a sealing member 33, when the sealing assembly 30 is in the compressed position, the sealing member 33 elastically abuts against the funnel 21, thereby improving the sealing effect, facilitating the formation of positive pressure in the first cavity 211, improving the filtration efficiency, and improving the accuracy of the experimental results.

[0075] In one embodiment, Figure 4 As shown, the pressure plate 32 includes a first sub-plate 321 and a second sub-plate 322 connected to each other. There is an angle between the first sub-plate 321 and the second sub-plate 322. The sealing member 33 is provided on the first sub-plate 321. The second sub-plate 322 is movably connected to the bracket 11.

[0076] The pressure plate 32 can be a one-piece structure, i.e., the first sub-plate 321 and the second sub-plate 322 are manufactured using an integrated molding process. The integrated molding process can be stamping, casting, etc., without limitation. The pressure plate 32 can also be a split structure, where the first sub-plate 321 and the second sub-plate 322 are connected and fixed by welding, bonding, clamping, screwing, riveting, etc. Optionally, the first sub-plate 321 and the second sub-plate 322 are smoothly connected. Optionally, the angle between the first sub-plate 321 and the second sub-plate 322 can be 90°.

[0077] The air inlet 31 extends through the first sub-plate 321 and the sealing member 33. In the orthographic projection of the funnel 21 on the first sub-plate 321, the funnel 21 is located within the sealing member 33. Optionally, the accommodating tube 214 is generally cylindrical, and the sealing member 33 is generally circular and sheet-like. The diameter of the sealing member 33 is greater than the outer diameter of the accommodating tube 214, and when the sealing member 33 abuts the end surface of the accommodating tube 214 away from the funnel body 213, the center of the sealing member 33 substantially coincides with the center of the accommodating tube 214.

[0078] With such an arrangement, the sealing member 33 can completely cover the opening of the first cavity 211 , thereby improving the sealing effect and achieving a good pressurizing effect.

[0079] In one embodiment, Figure 2 and Figure 3As shown, the positive pressure filtering device 100 also includes a driving member 51 and a transmission member 52. The transmission member 52 is arranged on the bracket 11, the pressure plate 32 is connected to the transmission member 52, and the driving member 51 is connected to the transmission member 52 for transmission, and is used to drive the pressure plate 32 to move relative to the bracket 11, so as to drive the sealing assembly 30 to move relative to the funnel assembly 20.

[0080] Optionally, the driving member 51 can be a motor, an oil cylinder, an air cylinder, etc., without limitation. The driving member 51 can be used to drive the pressure plate 32 to move in a straight line relative to the bracket 11. The driving member 51 has a driving shaft, and when the driving member 51 is running, the driving shaft can move linearly or rotate. For example, when the driving member 51 is a motor, the motor is a linear motor or a screw motor, which can make its driving shaft move linearly, or convert the rotational motion of the driving shaft into linear motion through the transmission member 52; for another example, when the driving member 51 is an oil cylinder or an air cylinder, the driving shaft is a piston rod, which can perform linear telescopic motion. Alternatively, the driving member 51 can also be used to drive the pressure plate 32 to rotate relative to the bracket 11, without limitation.

[0081] The driving member 51 can be connected and fixed to the bracket 11 through a sheet metal member. In a specific embodiment, Figure 1 and Figure 2 As shown, the driving member 51 is arranged on the side of the connecting plate 111 facing away from the sealing assembly 30 and the funnel assembly 20, and the driving member 51 is accommodated inside the bracket 11, saving space and improving aesthetics.

[0082] Optionally, the transmission member 52 may include a linear guide rail provided on the surface of the connecting plate 111, and the pressure plate 32 is slidably connected to the linear guide rail. The driving member 51 may be a linear motor, and the transmission member 52 may also include a screw-nut pair (i.e., a screw rod 521 and a nut provided on the screw rod 521), the screw rod 521 is connected to the drive shaft of the linear motor through a coupling, and the nut is connected to the pressure plate 32. The linear motor drives the screw rod 521 to rotate, so that the nut moves linearly on the screw rod 521, thereby driving the pressure plate 32 to move along the linear guide rail on the bracket 11. When the driving member 51 is located on the side of the connecting plate 111 facing away from the sealing assembly 30 and the funnel assembly 20, the transmission member 52 may also include a transfer arm, and the two opposite ends of the transfer arm are respectively connected to the nut and the pressure plate 32. At this time, a slide groove 112 may be provided on the connecting plate 111, and the transfer arm is passed through the slide groove 112 and can move along the slide groove 112. Alternatively, the transmission member 52 may be any other feasible transmission structure, and the pressing plate 32 may move relative to the connecting plate 111 , without any specific limitation.

[0083] By setting up the positive pressure filtering device 100, it also includes a driving member 51 and a transmission member 52. The pressure plate 32 is connected to the transmission member 52. The driving member 51 is used to drive the pressure plate 32 to move relative to the bracket 11, so as to drive the sealing assembly 30 to move relative to the funnel assembly 20. The transmission method is simple and efficient.

[0084] In one embodiment, Figure 4 As shown, the sealing assembly 30 also includes a connecting member 34, a pressing member 35, a guide column 36 and an elastic member 37. The connecting member 34 is movably connected to the pressure plate 32 and is connected to the transmission member 52. The pressing member 35 is fixedly connected to the connecting member 34 and is spaced apart from the pressure plate 32. One of the pressure plate 32 and the pressing member 35 is fixedly connected to one end of the guide column 36, and the other is slidably connected to the other end of the guide column 36. The elastic member 37 is arranged around the guide column 36, and one end of the elastic member 37 elastically abuts against the pressing member 35, and the other end elastically abuts against the pressure plate 32.

[0085] In a specific embodiment, Figure 2 and Figure 4 As shown, the connecting member 34 is connected to the transmission member 52, and can be fixedly connected to the transfer arm of the transmission member 52. The connecting member 34 can be a block-shaped object or a plate-shaped object that serves as a connection, without limitation. The connecting member 34 can be fixedly connected to the transfer arm and the pressure plate 32, respectively. It can also be slidably connected to a linear guide rail to guide the movement of the pressure plate 32 and improve the stability of the movement of the pressure plate 32.

[0086] The pressing member 35 and the guide post 36 are both disposed on the side of the pressure plate 32 facing away from the funnel assembly 20. The pressing member 35 and the connecting member 34 may be connected and secured by welding, bonding, clamping, screwing, riveting, or other methods, without limitation. Alternatively, one end of the guide post 36 may be fixedly connected to the pressure plate 32, while the other end may be slidably connected to the pressing member 35; alternatively, one end of the guide post 36 may be fixedly connected to the pressing member 35, while the other end may be slidably connected to the pressure plate 32, without limitation.

[0087] The elastic member 37 can be any feasible elastic member in the art, such as a compression spring elastic member, a tension spring elastic member, a rubber elastic member, etc., and the embodiment of the present invention does not impose any specific limitation.

[0088] Optionally, an elastic member 37 is wound around the guide post 36, with one end of the elastic member 37 abutting against the end surface of the pressing member 35 facing the pressing plate 32, and the other end abutting against the surface of the first sub-plate 321 facing away from the sealing member 33. The elastic member 37 is preferably a compression spring or a rubber sleeve.

[0089] When the connector 34 and the pressure plate 32 are not in relative motion, the elastic member 37 may have an initial deformation or no deformation. As the connector 34 drives the pressure plate 32 to press against the funnel assembly 20, the elastic member 37 may change from the initial deformation to a larger deformation, or from no deformation to deformation. As the connector 34 drives the pressure plate 32 away from the funnel assembly 20, the elastic member 37 may return from the large deformation to the initial deformation. The elastic deformation of the elastic member 37 provides a pressing force to the pressure plate 32, causing the seal 33 provided on the pressure plate 32 to elastically abut against the accommodating cylinder 214, thereby improving the sealing effect.

[0090] The movable connection between the connecting member 34 and the pressing plate 32 can be realized by providing a slide rail on the side of the connecting member 34 facing the pressing plate 32, and the pressing plate 32 is slidably connected to the slide rail. The slide rail can guide the pressing plate 32 when it moves relative to the connecting member 34, thereby increasing the stability of the movement of the pressing plate 32.

[0091] It is understood that the sealing assembly 30 may be movable relative to the bracket 11 and the funnel assembly 20 may be fixed relative to the bracket 11, or the sealing assembly 30 may be fixed relative to the bracket 11 and the funnel assembly 20 may be movable relative to the bracket 11, or the sealing assembly 30 may be movable relative to the bracket 11 and the funnel assembly 20 may be movable relative to the bracket 11, and this is not limited in this application. Due to the large weight of the funnel assembly 20, a large power source is required to move the funnel assembly 20, and there is a risk of the funnel assembly 20 falling. Therefore, it is preferred that the sealing assembly 30 be movable relative to the bracket 11 and the funnel assembly 20 be fixed relative to the bracket 11, thereby improving the stability of the entire device and reducing the cost of the device.

[0092] In one embodiment, Figure 1 As shown, the support assembly 10 further includes a positioning plate 13 and a base plate 14, both of which are spaced apart. Both the positioning plate 13 and the base plate 14 are connected to the bracket 11, with the positioning plate 13 positioned between the base plate 14 and the support plate 12. The positioning plate 13 defines a limiting groove 131, which is used to position and secure the liquid receiving bottle 200. The positive pressure filtration device 100 further includes a buffer 53, which is disposed on the surface of the base plate 14 facing the positioning plate 13 and is configured to elastically abut against the liquid receiving bottle 200.

[0093] Optionally, the positioning plate 13 and the bottom plate 14 are connected to the connecting plate 111 of the bracket 11 . The connection method can refer to the connection method between the supporting plate 12 and the connecting plate 111 , and there is no specific limitation.

[0094] refer to Figure 1The experimental device 1000 further includes a liquid receiving bottle 200, which is in communication with the second cavity 212 and is used to receive the sample in the second cavity 212. The liquid receiving bottle 200 and the second cavity 212 can be directly connected, that is, the liquid receiving bottle 200 is connected to the conduit 2132 of the funnel body 213 to communicate with the second cavity 212; or the liquid receiving bottle 200 and the second cavity 212 are indirectly connected, and the experimental device 1000 further includes a liquid receiving tube, one end of which is connected to the conduit 2132 of the funnel body 213 and the other end extends into the liquid receiving bottle 200. Both of the above methods are possible and are not specifically limited.

[0095] Optionally, the shape of the liquid receiving bottle 200 can be roughly round, conical, or square, and is not particularly limited. The sidewalls of the retaining groove 131 may enclose a shape similar to the cross-sectional shape of the liquid receiving bottle 200. A gap may be provided between the sidewalls of the retaining groove 131 and the outer wall of the liquid receiving bottle 200, or the sidewalls of the retaining groove 131 may be in close contact with the outer wall of the liquid receiving bottle 200 to secure the liquid receiving bottle 200 in place.

[0096] The buffer member 53 can be any suitable buffer member 53 known in the art, and its material can be highly elastic rubber or foam material, without limitation. The buffer member 53 can include a buffer groove, the shape of which is similar to the bottom of the liquid receiving bottle 200. The liquid receiving bottle 200 is at least partially accommodated in the buffer groove. When the liquid receiving bottle 200 is removed and placed, the buffer member 53 can provide a cushioning effect on the liquid receiving bottle 200, preventing it from being bumped.

[0097] In one embodiment, Figure 1 As shown, the positive pressure filtering device 100 further includes a liquid leakage prevention pan 54 , which is disposed below the funnel assembly 20 .

[0098] Optionally, in the orthographic projection of the anti-leakage tray 54, the funnel assembly 20 is located in the anti-leakage tray 54, and at least part of the support assembly 10 is located in the anti-leakage tray 54. The specific shape of the anti-leakage tray 54 is not limited and can be square, rectangular, circular, trapezoidal, etc.

[0099] When the sample to be filtered is poured into the funnel 21 , if the sample spills, the sample can be received by the leak-proof liquid tray 54 to prevent the liquid from flowing onto the desktop or work platform and causing pollution to the experimental environment.

[0100] In one embodiment, Figure 1 As shown, the anti-leakage tray 54 is provided with a drain connector 55, which is used to connect to a waste liquid bucket to drain the sample collected in the anti-leakage tray 54. The drain connector 55 and the waste liquid bucket can be any feasible structure in the art without limitation.

[0101] Optionally, the drain connector 55 is provided on the side of the anti-leakage tray 54 facing away from the funnel assembly 20, or the drain connector 55 is provided on the side of the anti-leakage tray 54, and the drain connector 55 is provided close to the bottom surface of the anti-leakage tray 54, so as to promptly drain the sample on the bottom surface of the anti-leakage tray 54 and prevent the spilled sample from accumulating in the anti-leakage tray 54.

[0102] In one embodiment, Figure 2 As shown, the pressurizing component 40 also includes a pressure regulating valve 43, which is connected to both the gas source and the gas inlet connector 42 and is used to adjust the air pressure in the first chamber 211; and / or, the pressurizing component 40 also includes a throttle valve 44, which is connected to both the gas source and the gas inlet connector 42 and is used to adjust the speed at which the gas enters the first chamber 211; and / or, the pressurizing component 40 also includes a pressure gauge (not shown in the figure), which is connected to the gas inlet connector 42 and is used to detect the air pressure in the first chamber 211. The pressure regulating valve 43 and the throttle valve 44 can accurately control the air pressure and delivery rate of the gas source to the first chamber 211, and can accurately control the filtration speed to ensure the filtration effect. When the air pressure in the first chamber 211 is equivalent to the external atmospheric pressure, it indicates that the filtration is complete.

[0103] Optionally, the gas source may be a gas source that can regulate its own pressure, in which case the pressure regulating valve 43 may be omitted.

[0104] By setting the pressure regulating valve 43, the throttle valve 44 and the pressure gauge, the pressurizing component 40 can accurately control the air pressure applied to the first cavity 211, and instantly control the pressure applied to the first cavity 211, so that the experimental results are accurate and the filtration efficiency is high.

[0105] Please refer to Figure 1 The present invention further provides an experimental device 1000 , including a liquid receiving bottle 200 and the positive pressure filtration device 100 in an embodiment of the present invention. The liquid receiving bottle 200 is connected to the second cavity 212 and is used to receive the sample in the second cavity 212 .

[0106] The experimental equipment 1000 further includes a transport device (not shown in the figure), which is used to take and place the funnel assembly 20 and / or the liquid receiving bottle 200 on the positive pressure filtration device 100.

[0107] The transport device can be a robotic arm, such as a four-axis robotic arm or a six-axis robotic arm; the transport device can also be a multi-directional translation mechanism, such as a horizontal movement mechanism, a vertical movement mechanism, or an XYZ three-axis movement mechanism; or the transport device can be a mobile robot. The specific structure of the transport device can refer to any feasible solution and is not limited by the embodiments of the present invention.

[0108] The transport device can move the funnel assembly 20 and / or the liquid receiving bottle 200 to a target location. For example, the transport device is used to clamp the liquid receiving bottle 200 and place it on the buffer 53; the transport device is also used to place or remove the funnel assembly 20 on the support plate 12, etc.

[0109] By providing a transport device, the funnel assembly 20 and / or the liquid collecting bottle 200 can be moved mechanically or robotically, resulting in a high degree of automation, improved filtration efficiency, and, in the case of toxic substances, protection of laboratory operators from harmful substances. Furthermore, the transport device can also be used to transport a container containing a sample to be filtered and to pour the sample from the container into the funnel assembly 20.

[0110] In the description of the embodiments of the present invention, it should be noted that the orientation or positional relationship of terms such as "center", "up", "down", "left", "right", "vertical", "horizontal", "inside" and "outside" is based on the orientation or positional relationship described in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0111] The above disclosure is only a preferred embodiment of the present invention, and certainly cannot be used to limit the scope of rights of the present invention. Ordinary technicians in this field can understand that all or part of the processes of the above embodiment and equivalent changes made in accordance with the claims of the present invention are still within the scope of the present invention.

Claims

1. A positive pressure filtration device, characterized in that: include: Support components; a funnel assembly placed on the support assembly, the funnel assembly comprising a funnel and a filter screen, the funnel having a receiving cavity, the filter screen being received in the receiving cavity and connected to the funnel, and dividing the receiving cavity into a first cavity and a second cavity; a sealing assembly movably connected to the supporting assembly, the sealing assembly being used to seal the first cavity, the sealing assembly being provided with an air inlet, the air inlet being in communication with the first cavity; A pressurizing component is communicated with the air inlet, and is used to pressurize the sample in the first cavity so that at least part of the sample passes through the filter and enters the second cavity, and the second cavity is used to communicate with the liquid receiving bottle.

2. The positive pressure filtration device according to claim 1, characterized in that: The funnel includes a funnel body and a accommodating cylinder. The funnel body is detachably connected to the accommodating cylinder. The filter is arranged between the funnel body and the accommodating cylinder. The accommodating cylinder has the first cavity, and the funnel body has the second cavity.

3. The positive pressure filtration device according to claim 2, characterized in that: A first annular protrusion is provided on the outer circumference of one end of the accommodating cylinder facing the funnel body, and a second annular protrusion is provided on the end of the funnel body facing the accommodating cylinder. The outer circumference of the first annular protrusion is in close contact with the inner circumference of the second annular protrusion.

4. The positive pressure filtration device according to claim 2, characterized in that: The support assembly includes a bracket and a support plate, the support plate is connected to the bracket, the funnel assembly is placed on the support plate, and the sealing assembly is movably connected to the bracket; the support plate is provided with a mounting groove, the mounting groove extends from the surface of the support plate facing away from the bracket toward the bracket, and the mounting groove is used to accommodate at least a portion of the funnel body.

5. The positive pressure filtration device according to claim 4, characterized in that: The sealing assembly includes a pressing plate and a sealing member, wherein the sealing member is arranged on a side of the pressing plate facing the funnel, and the pressing plate is movably connected to the bracket; When the sealing assembly is in the compressed position, the sealing member elastically abuts against the funnel.

6. The positive pressure filtration device according to claim 5, characterized in that: The pressure plate includes a first sub-plate and a second sub-plate connected to each other, and an angle is formed between the first sub-plate and the second sub-plate. The seal is arranged on the first sub-plate, and the second sub-plate is movably connected to the bracket. The air inlet hole passes through the first sub-plate and the seal, and in the orthographic projection of the funnel on the first sub-plate, the accommodating cylinder is located inside the seal.

7. The positive pressure filtration device according to claim 5, characterized in that: The positive pressure filtering device also includes a driving member and a transmission member. The transmission member is arranged on the bracket, the pressure plate is connected to the transmission member, and the driving member is in transmission connection with the transmission member and is used to drive the pressure plate to move relative to the bracket to drive the sealing assembly to move relative to the funnel assembly.

8. The positive pressure filtration device according to claim 7, characterized in that: The sealing assembly also includes a connecting piece, a pressing piece, a guide column and an elastic piece. The connecting piece is movably connected to the pressure plate and connected to the transmission piece. The pressing piece is fixedly connected to the connecting piece and has a gap with the pressure plate. One of the pressure plate and the pressing piece is fixedly connected to one end of the guide column, and the other is slidably connected to the other end of the guide column. The elastic piece is arranged around the guide column, and one end of the elastic piece elastically abuts against the pressing piece, and the other end elastically abuts against the pressure plate.

9. The positive pressure filtration device according to claim 4, characterized in that: The support assembly further includes a positioning plate and a bottom plate arranged at intervals, wherein the positioning plate and the bottom plate are both connected to the bracket, and the positioning plate is located between the bottom plate and the support plate, and the positioning plate is provided with a limiting groove, and the limiting groove is used to limit and fix the liquid receiving bottle; The positive pressure filtering device further comprises a buffer member, which is arranged on a surface of the bottom plate facing the positioning plate, and the liquid receiving bottle is placed on the buffer member.

10. The positive pressure filtration device according to any one of claims 1 to 9, characterized in that: The positive pressure filtration device further comprises a liquid leakage prevention tray, which is arranged below the funnel assembly; The anti-leakage tray is provided with a drainage joint, and the drainage joint is used to be connected to a waste liquid bucket to drain away the sample collected in the anti-leakage tray.

11. The positive pressure filtration device according to any one of claims 1 to 9, characterized in that: The pressurizing assembly includes an air source and an air inlet connector, wherein the air inlet connector is cooperatively connected to the air inlet hole, and the air source is connected to the air inlet hole through the air inlet connector and is used to pressurize the sample in the first cavity; The pressurizing component also includes a pressure regulating valve, which is connected to the gas source and the gas inlet connector and is used to adjust the air pressure in the first chamber; and / or, the pressurizing component also includes a throttle valve, which is connected to the gas source and the gas inlet connector and is used to adjust the speed at which the gas enters the first chamber; and / or, the pressurizing component also includes a pressure gauge, which is connected to the gas inlet connector and is used to detect the air pressure in the first chamber.

12. An experimental device, characterized in that: It comprises a liquid receiving bottle and the positive pressure filtration device according to any one of claims 1 to 11, wherein the liquid receiving bottle is communicated with the second cavity and is used to receive the sample in the second cavity.

13. The experimental device according to claim 12, characterized in that The experimental equipment further comprises a transport device, which is used to take and place the funnel assembly and / or the liquid receiving bottle on the positive pressure filtration device, and is also used to pour the sample to be filtered into the funnel assembly.

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