Negative pressure filtering device and experimental equipment

Abstract

The utility model discloses a negative pressure filtering device and experimental equipment, the negative pressure filtering device comprises a supporting assembly, a funnel assembly, an adapter and a vacuumizing 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 adapter is arranged on the supporting assembly and provided with a containing channel, one end of the funnel extends into the containing channel, an air exhaust channel is further formed in the side wall of the containing channel, and the end, away from the funnel, of the adapter is used for being communicated with a liquid receiving bottle; the vacuumizing assembly is communicated with the air exhaust channel and is used for forming negative pressure in the second cavity, so that at least part of the sample enters the second cavity through the filter screen. The negative pressure filtering device disclosed by the utility model is good in filtering effect and high in automation degree, and the filtering efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of experimental equipment, in particular to a negative 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 negative 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 negative pressure filtration device, comprising: a support assembly, a funnel assembly, an adapter and a vacuum assembly; the funnel assembly is placed on the support assembly, the funnel assembly includes a funnel and a filter, the funnel has a receiving chamber, the filter is received in the receiving chamber and connected to the funnel, and the receiving chamber is divided into a first chamber and a second chamber; the adapter is arranged on the support assembly, the adapter has a receiving channel, one end of the funnel extends into the receiving channel, and the side wall of the receiving channel is also provided with an exhaust channel, and the end of the adapter away from the funnel is used to communicate with a liquid receiving bottle; the vacuum assembly is connected to the exhaust channel, and the vacuum assembly is used to form a negative pressure in the second chamber so that at least part of the sample passes through the filter and enters the second chamber.

[0007] In one embodiment, the support assembly includes a support frame and a mounting seat, the mounting seat is connected to the support frame, the mounting seat has a accommodating cavity adapted to the funnel, the accommodating cavity has a first opening and a second opening arranged opposite to each other, the adapter is fixed to the second opening, the accommodating channel is connected to the second opening, the funnel is placed in the accommodating cavity through the first opening, and one end of the funnel extends into the accommodating channel.

[0008] In one embodiment, the negative pressure filtration device further includes a first seal, which is disposed on the end surface of the adapter facing the funnel, and is used to seal the connection position between the adapter and the funnel.

[0009] In one embodiment, the negative pressure filtration device further includes a container seat, which is connected to the support assembly and is used to place the liquid receiving bottle; the negative pressure filtration device further includes a second sealing member, which is arranged on the end face of the adapter facing the liquid receiving bottle, and the second sealing member is used to seal the contact position between the adapter and the liquid receiving bottle.

[0010] In one embodiment, the container seat is slidingly connected to the support assembly; the negative pressure filtration device also includes a first driving member and a first transmission member, the first transmission member is slidingly connected to the support assembly, the container seat is fixedly connected to the first transmission member, and the first driving member is connected to the first transmission member, and is used to drive the first transmission member to slide relative to the support assembly to drive the container seat to move.

[0011] In one embodiment, the funnel includes a funnel body and a accommodating cylinder, the funnel body is detachably connected to the accommodating cylinder, the filter is connected to the inner wall surface of the accommodating cylinder and is close to the end of the accommodating cylinder facing the funnel body, the accommodating cylinder has the first cavity, and the funnel body has the second cavity.

[0012] In one embodiment, the accommodating cylinder is placed at an end of the funnel body away from the adapter, and an annular protrusion is provided at an end of the funnel body facing the accommodating cylinder. The annular protrusion is used to limit the accommodating cylinder, and at least a portion of the accommodating cylinder can extend into the annular protrusion.

[0013] The funnel assembly further includes a third sealing member, which is disposed on the inner circumferential surface of the annular protrusion and is used to seal the contact position between the outer circumferential surface of the accommodating cylinder and the inner circumferential surface of the annular protrusion.

[0014] In one embodiment, there is a gap between the portion of the funnel body extending into the receiving channel and the side wall of the receiving channel, and the end of the funnel body extending into the receiving channel is farther away from the accommodating cylinder than the air extraction channel.

[0015] In one embodiment, the negative pressure filtration device further includes a pressing assembly, wherein the pressing assembly includes a pressing plate, wherein the pressing plate is connected to the supporting assembly, and the pressing plate is used to press the accommodating cylinder onto the funnel body.

[0016] In one embodiment, the pressure plate is slidingly connected to the support assembly; the clamping assembly also includes a second driving member and a second transmission member, the pressure plate includes a first sub-plate and a second sub-plate connected to each other, the first sub-plate is used to abut against the accommodating cylinder, the second sub-plate is fixedly connected to the second transmission member, the second transmission member is slidingly connected to the support assembly, and the second driving member is connected to the second transmission member for driving the second transmission member to slide relative to the support assembly to drive the pressure plate to move relative to the accommodating cylinder.

[0017] In one embodiment, the first sub-plate is annular, and the surface of the first sub-plate facing the accommodating tube is used to abut against the opening edge of the accommodating tube.

[0018] In one embodiment, the vacuum pump assembly includes a vacuum pump and a vacuum connector, the vacuum connector is cooperatively connected to the exhaust channel, the vacuum pump is connected to the exhaust channel through the vacuum connector, and is used to form a negative pressure in the second cavity.

[0019] In one embodiment, the vacuum pumping assembly further includes a vacuum gauge and a vacuum breaker valve, both of which are connected between the vacuum joint and the vacuum pump, the vacuum gauge being used to detect the vacuum value of the second chamber, and the vacuum breaker valve being used to connect the vacuum channel with the outside world.

[0020] In a second aspect, the present invention further provides an experimental device comprising the negative pressure filtration device described in any one of the various embodiments of the first aspect.

[0021] 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 negative pressure filtration device, and the transport device is also used to pour the sample to be filtered into the funnel assembly.

[0022] By arranging the funnel assembly, the adapter and the vacuum assembly, when the funnel assembly is working, the vacuum assembly forms a negative pressure in the second chamber of the funnel, so that at least part of the sample in the first chamber passes through the filter screen into the second chamber under the action of the external air pressure, thereby completing the filtration of the sample, having a good filtration effect, improving the filtration efficiency and having a high degree of automation. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] 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.

[0024] Figure 1 is a side view of an experimental device according to an embodiment;

[0025] Figure 2 is a perspective view of an experimental device according to an embodiment;

[0026] Figure 3 is a side view of an experimental device of an embodiment in another state;

[0027] Figure 4 A partial cross-sectional view of an experimental device according to an embodiment.

[0028] Description of reference numerals:

[0029] 1000-Experimental equipment;

[0030] 100-negative pressure filtration device;

[0031] 10-support assembly, 11-support frame, 111-connecting plate, 112-first slide groove, 113-second slide groove, 12-mounting seat, 121-accommodating cavity, 122-first opening, 123-second opening;

[0032] 20 - funnel assembly, 21 - funnel, 211 - first chamber, 212 - second chamber, 213 - funnel body, 2131 - cone, 2132 - conduit, 214 - receiving cylinder, 215 - annular protrusion, 22 - filter screen, 23 - third sealing member;

[0033] 30- adapter, 31- receiving channel, 32- exhaust channel;

[0034] 40-vacuum pumping assembly, 41-vacuum connector, 42-vacuum gauge, 43-vacuum breaker valve;

[0035] 50-container seat, 51-receiving slot;

[0036] 60-pressing assembly, 61-pressing plate, 611-first sub-plate, 612-second sub-plate, 62-second driving member, 63-second transmission member, 64-second lifting shaft;

[0037] 71-first sealing member, 72-second sealing member, 73-first driving member, 74-first transmission member, 75-first lifting shaft;

[0038] 200-Liquid receiving bottle. DETAILED DESCRIPTION

[0039] 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.

[0040] 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.

[0041] 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 this utility model specification 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.

[0042] 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.

[0043] Please refer to Figures 1 to 4 The present invention provides a negative pressure filtration device 100, comprising: a support assembly 10, a funnel assembly 20, an adapter 30, and a vacuum assembly 40. The funnel assembly 20 is placed on the support assembly 10 and includes 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.

[0044] Funnel 21 and filter screen 22 can be any suitable funnel 21 or filter screen 22 known in the art, without limitation. The connection between filter screen 22 and funnel 21 can be achieved by welding, bonding, snapping, screwing, riveting, or the like, without limitation. Optionally, both 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.

[0045] 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.

[0046] The adapter 30 is arranged on the support assembly 10. The adapter 30 has a receiving channel 31. One end of the funnel 21 extends into the receiving channel 31. The side wall of the receiving channel 31 also has an exhaust channel 32. The end of the adapter 30 away from the funnel 21 is used to communicate with the liquid receiving bottle 200.

[0047] The adapter 30 may be a one-piece structure, i.e., a one-piece structure manufactured by an integral molding process, such as stamping, casting, etc. The adapter 30 may also be a split structure, with the various parts of the adapter 30 being connected and secured by welding, bonding, clamping, screwing, riveting, or the like.

[0048] Optionally, a gap is defined between at least one side of the funnel 21 and the sidewall of the receiving passage 31, allowing the gas within the second chamber 212 to be extracted by the vacuum assembly 40 through the gap between the funnel 21 and the receiving passage 31. The end of the adapter 30, distal from the funnel 21, is connected to a liquid receiving bottle 200, which is used to hold the sample flowing out of the second chamber 212 after filtration. When the vacuum assembly 40 is in operation, the liquid receiving bottle 200 seals the end of the funnel 21 that connects to the second chamber 212, thereby creating a negative pressure environment within the second chamber 212.

[0049] The vacuum assembly 40 is in communication with the air extraction channel 32 . The vacuum assembly 40 is used to form a negative pressure in the second cavity 212 , so that at least a portion of the sample passes through the filter 22 and enters the second cavity 212 .

[0050] In one embodiment, Figure 4 As shown, the vacuum assembly 40 includes a vacuum pump (not shown in the figure) and a vacuum connector 41. The vacuum connector 41 is connected to the exhaust channel 32. The vacuum pump is connected to the exhaust channel 32 through the vacuum connector 41 and is used to form a negative pressure in the second cavity 212.

[0051] The vacuum pump can be a gas transmission pump, such as a hydraulic vacuum pump, a reciprocating vacuum pump, etc., or a gas capture pump, such as an adsorption pump, etc. The vacuum pump can also adopt any feasible vacuum device in the field, without specific limitation. The connection method of the vacuum connector 41 and the air extraction channel 32 can be snap-on, screw-on, etc., without limitation. Regarding the specific structure of the vacuum connector 41, reference can be made to the commonly used air inlet connector in the field, and no further details will be given. By setting the vacuum component 40 to include a vacuum pump and a vacuum connector 41, the vacuum component 40 can form a negative pressure in the second cavity 212 of the funnel 21, so that at least part of the sample in the first cavity 211 passes through the filter 22 into the second cavity 212 under the action of external air pressure, which can improve the filtration efficiency.

[0052] 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.

[0053] The negative pressure filtration device 100 of the present embodiment operates as follows: Before the negative pressure filtration device 100 is operated, the funnel assembly 20 and the liquid receiving bottle 200 are placed on the support assembly 10 manually or robotically. The liquid receiving bottle 200 is then connected to the end of the adapter 30 away from the funnel 21. After the funnel assembly 20 and the adapter 30 are compressed, the sample to be filtered is injected into the receiving chamber of the funnel 21. The injected sample is blocked by the filter screen 22 and contained in the first chamber 211. Furthermore, the vacuum assembly 40 is maintained in communication with the air extraction channel 32 of the adapter 30. During operation, the vacuum assembly 40 removes gas from the liquid receiving bottle 200 and the second chamber 212 through the air extraction channel 32, reducing the pressure in the liquid receiving bottle 200 and the second chamber 212 to less than atmospheric pressure. Since the first chamber 211 is connected to the outside world, at least a portion of the sample in the first chamber 211 passes through the filter screen 22 under the action of atmospheric pressure and enters the second chamber 212, achieving sample separation. After filtration is complete, the funnel assembly 20 and the liquid collecting bottle 200 are removed manually or by a robot, and the negative pressure filtration device 100 completes its work. The movement of the funnel assembly 20 and the liquid collecting bottle 200, the pouring of the sample to be filtered, and the operation of the vacuum assembly 40 can all be automatically completed by an automated program-controlled machine, resulting in a high degree of automation.

[0054] The negative pressure filtration device 100 in the embodiment of the present invention is provided with a funnel assembly 20, an adapter 30 and a vacuum assembly 40. When the funnel assembly 20 is working, the vacuum assembly 40 forms a negative pressure in the second chamber 212 of the funnel 21, so that at least part of the sample in the first chamber 211 passes through the filter 22 into the second chamber 212 under the action of external air pressure, completing the filtration of the sample, with good filtration effect, improved filtration efficiency, and a high degree of automation.

[0055] In one embodiment, Figure 1 、 Figure 2 and Figure 4 As shown, the support assembly 10 includes a support frame 11 and a mounting base 12, the mounting base 12 is connected to the support frame 11, the mounting base 12 has a accommodating cavity 121 adapted to the funnel 21, the accommodating cavity 121 has a first opening 122 and a second opening 123 arranged opposite to each other, the adapter 30 is fixed to the second opening 123, the accommodating channel 31 is connected to the second opening 123, the funnel 21 is placed in the accommodating cavity 121 via the first opening 122, and one end of the funnel 21 extends into the accommodating channel 31.

[0056] The support frame 11 can be a one-piece structure or a split structure, without limitation. The support frame 11 can be a box-like structure formed by splicing multiple plates, a rack-like structure formed by multiple plates, or a single plate, without limitation. Optionally, the support frame 11 includes a connecting plate 111, and the connecting plate 111 can be connected and fixed to the mounting base 12 by welding, bonding, clamping, screwing, riveting, etc.

[0057] Optionally, the mounting base 12 is generally block-shaped and defines a receiving cavity 121. The receiving cavity 121 is generally conical in shape. Furthermore, the sidewalls of the receiving cavity 121 are flared from the second opening 123 to the first opening 122 of the receiving cavity 121 to adapt the shape of the receiving cavity 121 to the funnel 21. Optionally, the diameter of the second opening 123 is smaller than the diameter of the first opening 122.

[0058] The adapter 30 and the second opening 123 may be connected and fixed by bonding, clamping, etc. Alternatively, the adapter 30 may be connected and fixed to the second opening 123 under external pressure, without limitation.

[0059] By setting the support assembly 10 including the mounting base 12, the funnel 21 is placed in the accommodating cavity 121 through the first opening 122, the adapter 30 is fixed to the second opening 123, and the end of the funnel 21 away from the first opening 122 extends into the accommodating channel 31. The mounting base 12 provides a connection position for the funnel 21 and the adapter 30, and the connection method between the funnel 21 and the adapter 30 is simple and reliable.

[0060] In one embodiment, Figure 4 As shown, the negative pressure filtration device 100 further includes a first seal 71 , which is disposed on the end surface of the adapter 30 facing the funnel 21 , and is used to seal the connection position between the adapter 30 and the funnel 21 .

[0061] The first sealing member 71 is connected to the end surface of the adapter 30 facing the funnel 21 by bonding, clamping, screwing, etc. The material of the first sealing member 71 can be nitrile rubber, silicone rubber, fluororubber, polyurethane rubber, etc.

[0062] Alternatively, the first sealing member 71 may be annular, with the end surface of the first sealing member 71 facing the funnel 21 abutting against the funnel 21, and the outer circumferential surface of the first sealing member 71 elastically abutting against the mounting base 12 at the second opening 123 to seal the connection between the funnel 21 and the adapter 30. Alternatively, the inner circumferential surface of the first sealing member 71 elastically abuts against the outer circumferential wall of the funnel 21 near the second opening 123, thereby improving the sealing effect and thereby enhancing the filtration efficiency.

[0063] By configuring the negative pressure filtration device 100 to further include a first sealing member 71 , the first sealing member 71 is used to seal the connection position between the adapter 30 and the funnel 21 , thereby improving the filtration efficiency and the accuracy of the experimental results.

[0064] In one embodiment, Figure 1 and Figure 2 As shown, the negative pressure filtration device 100 further includes a container seat 50 , which is connected to the support assembly 10 , and is used to place the liquid receiving bottle 200 .

[0065] The container base 50 can be a one-piece structure, and the one-piece molding process of the one-piece structure can be stamping, casting, etc., without limitation. The container base 50 can also be a split structure, and the various parts of the container base 50 can be connected and fixed by welding, bonding, clamping, screwing, riveting, etc.

[0066] The container seat 50 and the support assembly 10 can be fixedly connected, and the connection method can be welding, bonding, clamping, screwing, riveting, etc.; the container seat 50 and the support assembly 10 can also be movably connected, and the movable connection method can be rotating connection, sliding connection, etc., without limitation.

[0067] Optionally, the container seat 50 has a receiving groove 51 , and the receiving groove 51 is used to receive at least a portion of the liquid receiving bottle 200 .

[0068] Optionally, the experimental device 1000 further includes a liquid receiving bottle 200, or a person skilled in the art may use any commercially available liquid receiving bottle 200. The liquid receiving bottle 200 is connected to the second chamber 212 and is used to receive the sample in the second chamber 212. The liquid receiving bottle 200 and the adapter 30 may be directly connected, that is, the liquid receiving bottle 200 is connected to the end of the adapter 30 away from the funnel 21 to connect the receiving channel 31 and the second chamber 212; or, the liquid receiving bottle 200 and the adapter 30 are indirectly connected, and the experimental device 1000 further includes a liquid receiving tube, one end of which is connected to the adapter 30 and the other end of which seals the opening of the liquid receiving bottle 200. All of the above methods are possible and are not specifically limited.

[0069] Alternatively, the shape of the liquid receiving bottle 200 may be a round bottle, a conical bottle, a square bottle, etc., without limitation. The shape of the receiving groove 51 is similar to the shape of the bottom end of the liquid receiving bottle 200. At least a portion of the liquid receiving bottle 200 is received in the receiving groove 51, which acts as a buffer for the liquid receiving bottle 200 when placed on the container holder 50, preventing it from being bumped.

[0070] like Figure 1 and 4 As shown, the negative pressure filtration device 100 further includes a second sealing member 72 , which is disposed on the end surface of the adapter 30 facing the liquid receiving bottle 200 . The second sealing member 72 is used to seal the contact position between the adapter 30 and the liquid receiving bottle 200 .

[0071] The connection method of the second sealing member 72 and the end surface of the adapter 30 facing the liquid receiving bottle 200, as well as the material of the second sealing member 72, can be referred to the first sealing member 71 above and will not be repeated. The liquid receiving bottle 200 abuts against the second sealing member 72 to achieve a sealed connection.

[0072] Optionally, the second sealing member 72 is annular, and at least a portion of the adapter 30 can be inserted through the second sealing member 72, and the end of the adapter 30 away from the funnel 21 can extend into the liquid receiving bottle 200. The inner circumference of the second sealing member 72 abuts against the outer circumference of the adapter 30 where it extends into the liquid receiving bottle 200. The second sealing member 72 also seals the opening of the liquid receiving bottle 200, thereby sealing the connection between the adapter 30 and the liquid receiving bottle 200, thereby forming a closed space within the second cavity 212 of the funnel 21, the receiving channel 31, and the interior of the liquid receiving bottle 200.

[0073] By setting the container seat 50 and the second sealing member 72, the container seat 50 is used to place the liquid receiving bottle 200, and the second sealing member 72 is used to seal the liquid receiving position of the adapter 30 and the liquid receiving bottle 200. A sealed space is formed in the second cavity 212 of the funnel 21 and the liquid receiving bottle 200, which facilitates the vacuum assembly 40 to form a negative pressure in the second cavity 212, and the negative pressure filtration device 100 has high filtration efficiency.

[0074] In one embodiment, Figure 2 As shown, the container seat 50 is slidably connected to the support assembly 10, and the negative pressure filtration device 100 also includes a first driving member 73 and a first transmission member 74. The first transmission member 74 is slidably connected to the support assembly 10, and the container seat 50 is fixedly connected to the first transmission member 74. The first driving member 73 is connected to the first transmission member 74 and is used to drive the first transmission member 74 to slide relative to the support assembly 10 to drive the container seat 50 to move.

[0075] Optionally, the first drive member 73 can be a motor, an oil cylinder, an air cylinder, etc., without limitation. The first drive member 73 can be used to drive the first transmission member 74 to slide along a straight line relative to the support assembly 10. The first drive member 73 has a drive shaft, and when the first drive member 73 is in operation, the drive shaft can move linearly or rotate. For example, when the first drive member 73 is a motor, the motor is a linear motor or a screw motor, which can make its drive shaft move linearly, or convert the rotational motion of the drive shaft into linear motion through the first transmission member 74; for another example, when the first drive member 73 is a oil cylinder or an air cylinder, the drive shaft is a piston rod, which can perform linear telescopic motion.

[0076] Optionally, the first driving member 73 can be connected and fixed to the supporting assembly 10 through a sheet metal member. Figure 1 and Figure 2 As shown, the first driving member 73 is arranged on the side of the connecting plate 111 facing away from the funnel assembly 20, which makes rational use of space, facilitates weight balancing, and improves the stability of the device.

[0077] Optionally, the first transmission member 74 and the container seat 50 can be an integrated structure or a split structure, and the first transmission member 74 and the container seat 50 are connected and fixed by welding, bonding, clamping, screwing, riveting, etc. without limitation.

[0078] Optionally, a linear guide rail is provided on the surface of the connecting plate 111, and the first transmission member 74 is slidably connected to the linear guide rail and drives the container seat 50 to slide relative to the linear guide rail under the drive of the first driving member 73. Alternatively, Figure 2As shown, the connecting plate 111 is provided with two first chutes 112 at intervals, and the first transmission member 74 is passed through the first chutes 112 and is slidably connected to the connecting plate 111. The negative pressure filtration device 100 also includes a first lifting shaft 75, which is connected to the drive shaft of the first driving member 73 and rotates along its own axis under the drive of the first driving member 73. The outer surface of the first lifting shaft 75 is provided with a thread, at least a portion of the first transmission member 74 is sleeved on the first lifting shaft 75, and the portion of the first transmission member 74 connected to the first lifting shaft 75 is also provided with a thread. The first transmission member 74 is cooperatively connected to the first lifting shaft 75, and the rotation of the first lifting shaft 75 around its own axis can be converted into a linear movement of the first transmission member 74, so that the first transmission member 74 slides relative to the connecting plate 111 under the drive of the first driving member 73 to drive the container seat 50 to move.

[0079] Alternatively, the first transmission member 74 may also be any other feasible transmission structure, and the first transmission member 74 may slide relative to the support assembly 10 under the drive of the first driving member 73, and there is no specific limitation.

[0080] Specifically, refer to Figure 1 、 Figure 2 and Figure 3 , the mounting seat 12 is fixedly connected to the support frame 11, and the container seat 50 is slidably connected to the support frame 11. Before the negative pressure filtration device 100 starts filtering, Figure 3 As shown, the liquid receiving bottle 200 is placed on the container seat 50 manually or by a robot. At this time, there is a large gap between the container seat 50 and the adapter 30, which is convenient for placing the liquid receiving bottle 200. After placing the liquid receiving bottle 200, as shown in FIG. Figure 1 and Figure 2 As shown, the container holder 50, driven by the first transmission member 74, slides relative to the support assembly 10, moving closer to the adapter 30, until the liquid receiving bottle 200 is sealedly connected to the end of the adapter 30 away from the funnel 21. The liquid receiving bottle 200 is installed and filtration can begin. At this point, the container holder 50 can remain in its current position. After filtration is completed, the container holder 50, driven by the first transmission member 74, slides relative to the support assembly 10 away from the adapter 30, facilitating manual or mechanical removal of the liquid receiving bottle 200 from the container holder 50 and obtaining the filtered sample.

[0081] By setting the first driving member 73 and the first transmission member 74, the first driving member 73 drives the first transmission member 74 to drive the container seat 50 to slide relative to the support assembly 10, which is convenient for placing and removing the liquid receiving bottle 200 during the experiment, and also convenient for making the liquid receiving bottle 200 and the second sealing member 72 tightly contact each other. The degree of automation is high, the transmission method is simple and efficient, and the filtering effect is good.

[0082] In one embodiment, reference Figure 1 and Figure 4The funnel 21 includes a funnel body 213 and a receiving tube 214. The funnel body 213 is detachably connected to the receiving tube 214. The filter 22 is connected to the inner wall of the receiving tube 214 and is located near the end of the receiving tube 214 facing the funnel body 213. The receiving tube 214 has a first cavity 211, and the funnel body 213 has a second cavity 212. 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 remote 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 remote from the conduit 2132 is connected to the receiving tube 214, and the cone 2131 is flared from the end where the cone 2131 is connected to the conduit 2132 to the end where the cone 2131 is connected to the receiving tube 214.

[0083] 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.

[0084] Optionally, the cone 2131 is received in the accommodating cavity 121 , and at least a portion of the conduit 2132 extends into the accommodating channel 31 .

[0085] The accommodating cylinder 214 and the funnel body 213 can be pre-installed together and placed on the mounting seat 12 manually or by a robotic arm, or the funnel body 213 can be placed in the accommodating cavity 121 of the mounting seat 12 through the first opening 122 manually or by a robotic arm, and then the accommodating cylinder 214 can be placed on the end of the funnel body 213 away from the adapter 30. All of the above methods are acceptable and are not limited.

[0086] 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 or the funnel body 213 by bonding, snapping, screwing, 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 squeezing force between the accommodating cylinder 214 and the funnel body 213.

[0087] Optionally, the filter 22 and the accommodating cylinder 214 can be combined to form a screen. The screen can be any standard product that can be purchased, so that experimenters can purchase screens of different mesh sizes for experiments as needed.

[0088] When the vacuum assembly 40 does not create a negative pressure within the second chamber 212, the unfiltered sample is contained within the first chamber 211. The vacuum assembly 40 extracts the air from the second chamber 212, reducing the pressure therein to less than atmospheric pressure. The liquid (or gas) in the sample, under the influence of atmospheric pressure, passes through the filter 22 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 and removed independently for easy cleaning and reuse.

[0089] By configuring the funnel 21 to include a detachable funnel body 213 and a receiving tube 214 with a filter screen 22, the funnel body 213 and the receiving tube 214 can be placed independently. After filtering is completed, the funnel body 213 and the receiving tube 214 can be detached and taken out for easy cleaning and reuse.

[0090] In one embodiment, Figure 4 As shown, the accommodating cylinder 214 is placed at one end of the funnel body 213 away from the adapter 30, and an annular protrusion 215 is provided at one end of the funnel body 213 facing the accommodating cylinder 214. The annular protrusion 215 is used to limit the accommodating cylinder 214, and at least part of the accommodating cylinder 214 can extend into the annular protrusion 215.

[0091] Optionally, the inner wall of the annular protrusion 215 is in close contact with at least the portion of the outer wall of the accommodating tube 214 that extends into the annular protrusion 215. Optionally, the annular protrusion 215 includes a bottom wall, which is the end surface of the annular protrusion 215 connected to the funnel body 213. The end surface of the end of the accommodating tube 214 that extends into the annular protrusion 215 can be in close contact with the bottom wall of the annular protrusion 215, thereby preventing sample from remaining in the gap between the funnel body 213 and the accommodating tube 214.

[0092] The funnel assembly 20 further includes a third seal 23 , which is disposed on the inner circumference of the annular protrusion 215 . The third seal 23 is used to seal the contact position between the outer circumference of the accommodating cylinder 214 and the inner circumference of the annular protrusion 215 .

[0093] Optionally, the third sealing member 23 is an annular sealing ring, which is used to seal the gap between the annular protrusion 215 and the accommodating tube 214. The sealing ring can be arranged between the inner circumference of the annular protrusion 215 and the outer circumference of the accommodating tube 214. In this case, the end surface of the accommodating tube 214 extending into the annular protrusion 215 can be in close contact with the bottom wall of the annular protrusion 215, or there can be a gap; or, as shown in FIG. Figure 4As shown, a sealing ring is disposed on the bottom wall of the annular protrusion 215 and elastically abuts against the end surface of the accommodating tube 214 extending into the annular protrusion 215, thereby preventing the sample from flowing out of the gap between the annular protrusion 215 and the accommodating tube 214. The sealing ring can be any suitable sealing ring in the art and is not particularly limited.

[0094] By arranging that at least a portion of the accommodating cylinder 214 extends into the annular protrusion 215 and sealing the contact position between the accommodating cylinder 214 and the annular protrusion 215 through the third sealing member 23, the sealing between the accommodating cylinder 214 and the funnel body 213 is good, thereby preventing sample leakage and further improving the filtering effect and the accuracy of the experimental results.

[0095] In one embodiment, Figure 4 As shown, there is a gap between the portion of the funnel body 213 that extends into the receiving channel 31 and the sidewall of the receiving channel 31, and the end of the funnel body 213 that extends into the receiving channel 31 is further away from the accommodating cylinder 214 than the air extraction channel 32. This arrangement prevents the filtered sample flowing out of the second chamber 212 from being drawn along the air extraction channel 32 by the vacuum assembly 40 when the vacuum assembly 40 is operating to extract gas from the receiving channel 31, thereby affecting the accuracy of the experimental results.

[0096] In one embodiment, Figure 1 and Figure 2 As shown, the negative pressure filtration device 100 further includes a pressing assembly 60 , which includes a pressing plate 61 . The pressing plate 61 is connected to the supporting assembly 10 , and is used to press the accommodating cylinder 214 onto the funnel body 213 .

[0097] The pressure plate 61 and the support assembly 10 can be fixedly connected, and the connection method can be welding, bonding, clamping, screwing, riveting, etc.; the pressure plate 61 and the support assembly 10 can also be movably connected, and the movable connection method can be a rotating connection, a sliding connection, etc., without limitation.

[0098] Optionally, in the negative pressure filtration device 100 of the embodiment of the present invention, the adapter 30 can be connected and fixed to the support assembly 10, and the pressure plate 61 and the container seat 50 can be moved relative to the support assembly 10 to facilitate the removal and placement of the funnel assembly 20 and the liquid receiving bottle 200, and to press and seal the funnel assembly 20 and the adapter 30, and the adapter 30 and the liquid receiving bottle 200; or, the container seat 50 can be connected and fixed to the support assembly 10, and the pressure plate 61 and the mounting seat 12 can be moved relative to the support assembly 10; or, the pressure plate 61 can be connected and fixed to the support assembly 10, and the adapter 30 and the container seat 50 can be moved relative to the support assembly 10. All of the above methods are possible and are not specifically limited.

[0099] By providing the compression assembly 60 with a pressure plate 61, which is used to press the accommodating cylinder 214 against the funnel body 213, a seal can be achieved between the accommodating cylinder 214 and the funnel body 213. During the negative pressure filtration process, the accommodating cylinder 214 is unlikely to shake relative to the funnel body 213, thereby improving the filtration effect. In addition, a tight seal can be achieved between the funnel assembly 20 and the adapter 30, further improving the sealing effect.

[0100] In one embodiment, reference Figure 1 and Figure 2 The pressing plate 61 is slidably connected to the support assembly 10. The pressing assembly 60 also includes a second driving member 62 and a second transmission member 63. The pressing plate 61 includes a first sub-plate 611 and a second sub-plate 612 connected to each other. The first sub-plate 611 is used to abut against the accommodating cylinder 214. The second sub-plate 612 is fixedly connected to the second transmission member 63. The second transmission member 63 is slidably connected to the support assembly 10. The second driving member 62 is connected to the second transmission member 63 and is used to drive the second transmission member 63 to slide relative to the support assembly 10, thereby driving the pressing plate 61 to move relative to the accommodating cylinder 214.

[0101] The pressure plate 61 can be a one-piece structure, i.e., the first sub-plate 611 and the second sub-plate 612 are formed using an integrated molding process. The integrated molding process can be stamping, casting, etc., without limitation. The pressure plate 61 can also be a split structure, with the first sub-plate 611 and the second sub-plate 612 connected and secured together by welding, bonding, clamping, screwing, riveting, etc. Optionally, one end of the second sub-plate 612 is connected to the first sub-plate 611, and the other end is connected and secured to the second transmission member 63.

[0102] Optionally, similar to the first driving member 73, the second driving member 62 can be a motor, a cylinder, a pneumatic cylinder, etc., without limitation. The structure of the second driving member 62 and the arrangement of the second driving member 62 on the support assembly 10 can refer to the first driving member 73 described above and will not be repeated here.

[0103] The second transmission member 63 and the second sub-plate 612 may be an integral structure or a split structure, and may be connected and fixed by welding, bonding, clamping, screwing, riveting, etc., without limitation.

[0104] Optionally, the second transmission member 63 may be slidably connected to a linear guide rail provided on the surface of the connecting plate 111. Alternatively, Figure 2 As shown, the connecting plate 111 further defines two second slots 113 spaced apart from each other. The second transmission member 63 is disposed in the second slots 113 and is slidably connected to the connecting plate 111. The pressing assembly 60 further includes a second lifting shaft 64. The transmission coordination between the second transmission member 63, the second lifting shaft 64, and the second driving member 62 is similar to the transmission coordination between the first transmission member 74, the first lifting shaft 75, and the first driving member 73 described above, and will not be further described.

[0105] Alternatively, the second transmission member 63 may also be any other feasible transmission structure, and the second transmission member 63 may slide relative to the support assembly 10 under the drive of the second driving member 62, and there is no specific limitation.

[0106] By providing the second driving member 62 and the second transmission member 63 , the second driving member 62 drives the second transmission member 63 to drive the pressing plate 61 to slide relative to the supporting assembly 10 to press the accommodating cylinder 214 , with a high degree of automation and a simple and efficient transmission method.

[0107] In one embodiment, reference Figure 2 The first sub-plate 611 is annular, and the surface of the first sub-plate 611 facing the accommodating tube 214 is used to abut against the opening edge of the accommodating tube 214 .

[0108] Optionally, the shape of the first sub-plate 611 is similar to the end face of the accommodating cylinder 214 away from the funnel body 213. In the positive projection of the first sub-plate 611, at least part of the contour of the accommodating cylinder 214 falls within the first sub-plate 611, so that when the second transmission member 63 drives the pressure plate 61 to move, the first sub-plate 611 can provide a clamping force to the accommodating cylinder 214 to seal the end where the accommodating cylinder 214 is connected to the funnel body 213.

[0109] Optionally, the first sub-plate 611 has an opening, which is located at one end of the first sub-plate 611 away from the second sub-plate 612. When pouring the sample to be filtered into the first cavity 211, the opening prevents the sample from splashing on the first sub-plate 611 and causing corrosion, thereby extending the service life of the first sub-plate 611.

[0110] By setting the first sub-plate 611 to be annular, the first sub-plate 611 will not completely close the first cavity 211 while pressing the accommodating cylinder 214. At least part of the sample in the first cavity 211 can pass through the filter 22 into the second cavity 212 under atmospheric pressure, avoiding affecting the filtering effect.

[0111] In one embodiment, the vacuum pumping assembly 40 also includes a vacuum gauge 42 and a vacuum breaker valve 43. The vacuum gauge 42 and the vacuum breaker valve 43 are both connected between the vacuum connector 41 and the vacuum pump. The vacuum gauge 42 is used to detect the vacuum value of the second chamber 212, and the vacuum breaker valve 43 is used to connect the exhaust channel 32 with the outside world.

[0112] The vacuum gauge 42 and the vacuum breaker valve 43 can be arranged in series or in parallel, without limitation. Optionally, the vacuum gauge 42 and the vacuum breaker valve 43 are arranged in series, and the gas in the second chamber 212 can pass through the vacuum connector 41, the vacuum gauge 42, the vacuum breaker valve 43, and the vacuum pump in sequence, or can pass through the vacuum connector 41, the vacuum breaker valve 43, the vacuum gauge 42, and the vacuum pump in sequence, without limitation.

[0113] The vacuum gauge 42 can be a thermal ionization vacuum gauge 42, an electromigration vacuum gauge 42, a thermal conductivity vacuum gauge 42, or any other suitable vacuum measuring instrument in the art. The vacuum breaker valve 43 is configured to open after the negative pressure filtration device 100 completes filtration, allowing outside air to enter the exhaust passage 32 and the second chamber 212, thereby breaking the vacuum effect within the second chamber 212 and preventing the liquid receiving bottle 200 from being difficult to separate from the funnel 21 under external pressure.

[0114] By providing the vacuum gauge 42 and the vacuum breaking valve 43 , the vacuum value in the second chamber 212 can be adjusted according to actual conditions, and the operation of the vacuum pumping component 40 can be controlled, so that the experimental results are highly accurate.

[0115] Please refer to Figure 1 and Figure 4 The present invention further provides an experimental device 1000 , comprising a liquid receiving bottle 200 and the negative pressure filtration device 100 in an embodiment of the present invention. The liquid receiving bottle 200 is connected to the adapter 30 and is used to receive the sample in the second cavity 212 .

[0116] The experimental equipment 1000 also 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 negative pressure filtration device 100, and is also used to pour the sample to be filtered into the funnel assembly 20.

[0117] 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.

[0118] The transport device can move the funnel assembly 20 and / or the liquid receiving bottle 200 to a desired location. For example, the transport device is used to pick up the liquid receiving bottle 200 and place it on the container holder 50. The transport device is also used to place or remove the funnel body 213 and / or the receiving cylinder 214 from the mounting base 12, etc. The transport device can also be used to pick up a container (such as a reagent bottle) containing a sample to be filtered and pour the sample to be filtered into the funnel assembly 20.

[0119] By setting up a transport device, the funnel assembly 20 and / or the liquid receiving bottle 200 can be picked up and placed by a machine or robot, and the sample to be filtered can be poured into the funnel assembly 20. The experimental equipment 1000 has a high degree of automation, which can improve the filtration efficiency of the negative pressure filtration device 100. When the sample is a substance with a certain toxicity, it can also prevent the experimental operators from being harmed by harmful substances.

[0120] 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.

[0121] 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 negative 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; An adapter is provided on the support assembly, the adapter having a receiving channel, one end of the funnel extends into the receiving channel, a side wall of the receiving channel is further provided with an air extraction channel for receiving a liquid bottle, and an end of the adapter away from the funnel is used to connect with the receiving bottle; A vacuum pumping component is communicated with the air extraction channel, and is used for forming a negative pressure in the second cavity so that at least part of the sample passes through the filter and enters the second cavity.

2. The negative pressure filtration device according to claim 1, characterized in that: The support assembly includes a support frame and a mounting seat, the mounting seat is connected to the support frame, the mounting seat has a accommodating cavity adapted to the funnel, the accommodating cavity has a first opening and a second opening arranged opposite to each other, the adapter is fixed to the second opening, the accommodating channel is connected to the second opening, the funnel is placed in the accommodating cavity through the first opening, and one end of the funnel extends into the accommodating channel.

3. The negative pressure filtration device according to claim 1, characterized in that: The negative pressure filtration device further includes a first sealing member, which is arranged on the end surface of the adapter facing the funnel, and is used to seal the connection position between the adapter and the funnel.

4. The negative pressure filtration device according to claim 1, characterized in that: The negative pressure filtration device further comprises a container seat, the container seat being connected to the support assembly and being used to place the liquid receiving bottle; The negative pressure filtration device further includes a second sealing member, which is arranged on the end surface of the adapter facing the liquid receiving bottle, and is used to seal the contact position between the adapter and the liquid receiving bottle.

5. The negative pressure filtration device according to claim 4, characterized in that: The container seat is slidably connected to the support assembly; the negative pressure filtration device also includes a first driving member and a first transmission member, the first transmission member is slidably connected to the support assembly, the container seat is fixedly connected to the first transmission member, and the first driving member is connected to the first transmission member, and is used to drive the first transmission member to slide relative to the support assembly to drive the liquid receiving bottle of the container seat to move.

6. The negative pressure filtration device according to any one of claims 1 to 5, 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 connected to the inner wall surface of the accommodating cylinder and is close to the end of the accommodating cylinder facing the funnel body. The accommodating cylinder has the first cavity and the funnel body has the second cavity.

7. The negative pressure filtration device according to claim 6, characterized in that: The accommodating cylinder is placed at one end of the funnel body away from the adapter. An annular protrusion is provided at one end of the funnel body facing the accommodating cylinder. The annular protrusion is used to limit the accommodating cylinder. At least a portion of the accommodating cylinder can extend into the annular protrusion. The funnel assembly further includes a third sealing member, which is disposed on the inner circumferential surface of the annular protrusion and is used to seal the contact position between the outer circumferential surface of the accommodating cylinder and the inner circumferential surface of the annular protrusion.

8. The negative pressure filtration device according to claim 6, characterized in that: There is a gap between the portion of the funnel body extending into the receiving channel and the side wall of the receiving channel, and the end of the funnel body extending into the receiving channel and the liquid receiving bottle is farther away from the liquid receiving bottle accommodating cylinder than the air extraction channel.

9. The negative pressure filtration device according to claim 7, characterized in that: The negative pressure filtering device further includes a pressing assembly, which includes a pressing plate connected to the supporting assembly, and the pressing plate is used to press the accommodating cylinder onto the funnel body.

10. The negative pressure filtration device according to claim 9, characterized in that: The pressure plate is slidably connected to the support assembly; the clamping assembly also includes a second driving member and a second transmission member, the pressure plate includes a first sub-plate and a second sub-plate connected to each other, the first sub-plate is used to abut against the accommodating cylinder, the second sub-plate is fixedly connected to the second transmission member, the second transmission member is slidably connected to the support assembly, and the second driving member is connected to the second transmission member for driving the second transmission member to slide relative to the support assembly to drive the pressure plate to move relative to the accommodating cylinder.

11. The negative pressure filtration device according to claim 10, characterized in that: The first sub-plate is annular, and the surface of the first sub-plate facing the accommodating tube is used to abut against the opening edge of the accommodating tube.

12. The negative pressure filtration device according to claim 1, characterized in that: The vacuum pump assembly includes a vacuum pump and a vacuum connector. The vacuum connector is cooperatively connected to the air extraction channel. The vacuum pump is connected to the air extraction channel through the vacuum connector and is used to form a negative pressure in the second cavity.

13. The negative pressure filtration device according to claim 12, characterized in that: The vacuum pumping assembly also includes a vacuum gauge and a vacuum breaker valve, both of which are connected between the vacuum joint and the vacuum pump. The vacuum gauge is used to detect the vacuum value of the second chamber, and the vacuum breaker valve is used to connect the exhaust channel with the outside world.

14. An experimental device, characterized in that: Comprising the negative pressure filtration device according to any one of claims 1 to 13.

15. The experimental device according to claim 14, 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 negative pressure filtration device, and is also used to pour the sample to be filtered into the funnel assembly.

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