CN108722188B - Filter device - Google Patents
Filter device Download PDFInfo
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- CN108722188B CN108722188B CN201710258604.XA CN201710258604A CN108722188B CN 108722188 B CN108722188 B CN 108722188B CN 201710258604 A CN201710258604 A CN 201710258604A CN 108722188 B CN108722188 B CN 108722188B
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- Prior art keywords
- filter
- communicated
- chamber
- pipe body
- contact head
- Prior art date
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- 239000012528 membrane Substances 0.000 claims abstract description 51
- 238000007789 sealing Methods 0.000 claims abstract description 26
- 239000007789 gas Substances 0.000 claims description 47
- 238000004891 communication Methods 0.000 claims description 30
- IJGRMHOSHXDMSA-UHFFFAOYSA-N nitrogen Substances N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 30
- 229910052757 nitrogen Inorganic materials 0.000 claims description 16
- 230000001276 controlling effect Effects 0.000 claims description 8
- 230000001105 regulatory effect Effects 0.000 claims description 8
- 238000005070 sampling Methods 0.000 claims description 8
- 239000007788 liquid Substances 0.000 claims description 4
- 239000003566 sealing material Substances 0.000 claims description 3
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 claims description 2
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 239000012530 fluid Substances 0.000 claims 4
- 239000012488 sample solution Substances 0.000 abstract description 35
- 238000001914 filtration Methods 0.000 abstract description 9
- 239000000523 sample Substances 0.000 description 12
- 238000000034 method Methods 0.000 description 4
- 230000000903 blocking effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 239000007888 film coating Substances 0.000 description 1
- 238000009501 film coating Methods 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000447 pesticide residue Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
- B01D61/58—Multistep processes
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
- G01N30/02—Column chromatography
- G01N30/04—Preparation or injection of sample to be analysed
- G01N30/06—Preparation
- G01N30/14—Preparation by elimination of some components
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2311/00—Details relating to membrane separation process operations and control
- B01D2311/14—Pressure control
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2313/00—Details relating to membrane modules or apparatus
- B01D2313/24—Specific pressurizing or depressurizing means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
- G01N30/02—Column chromatography
- G01N30/04—Preparation or injection of sample to be analysed
- G01N30/06—Preparation
- G01N30/14—Preparation by elimination of some components
- G01N2030/146—Preparation by elimination of some components using membranes
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Water Supply & Treatment (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Physics & Mathematics (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The invention provides a filter, relates to the technical field of filtering devices, and aims to reduce the working strength of workers and improve the working efficiency. The main technical scheme of the invention is as follows: a filter, comprising: the positive pressure chamber is internally provided with a chamber, and positive pressure gas is stored in the chamber; the trigger communicating device is connected with the positive pressure chamber, an air inlet and an air outlet are formed in the trigger communicating device, an air guide channel which is communicated with the air inlet and the air outlet is formed in the trigger communicating device, a trigger part is arranged on the trigger communicating device, and the trigger part is used for enabling the air inlet to be communicated with the chamber; the filter assembly comprises a tube body and a filter membrane, the tube body is provided with an inlet and an outlet which are communicated, the filter membrane is communicated with the outlet, the trigger communicating vessel is used for sealing the inlet, and the exhaust port is communicated with the tube body. The filter is mainly used for filtering the sample solution.
Description
Technical Field
The invention relates to the technical field of filtering devices, in particular to a filter.
Background
In the analysis and detection of pesticide residues, a sample solution needs to pass through a filter membrane and then enters a chromatographic instrument for analysis.
Currently, syringes are used to assemble the filter membranes, and the sample solution is passed through the filter membranes by the injection pressure of the syringe, which is manually operated, one sample per filter membrane, and the worker presses the plunger of the syringe to pass the sample solution through the filter membrane.
However, in performing the above-described operations, the inventors found that there are at least the following problems in the prior art: when the sample quantity is great, the staff need press the syringe with every sample one by one and realize passing the filter membrane, long-time multiple pressing, bring tired for the staff, reduce work efficiency.
Disclosure of Invention
Therefore, the embodiment of the invention provides the filter, which reduces the working strength of workers and improves the working efficiency.
In order to achieve the above purpose, the present invention mainly provides the following technical solutions:
an embodiment of the present invention provides a filter including:
the positive pressure chamber is internally provided with a chamber, and the chamber is used for storing positive pressure gas;
the trigger communicating device is connected with the positive pressure chamber, an air inlet and an air outlet are formed in the trigger communicating device, an air guide channel for communicating the air inlet and the air outlet is formed in the trigger communicating device, a trigger part is arranged on the trigger communicating device, and the trigger part is used for enabling the air inlet to be communicated with the chamber;
the filter assembly comprises a pipe body and a filter membrane, wherein the pipe body is provided with an inlet and an outlet which are communicated, the filter membrane is communicated with the outlet, the trigger communication device is used for sealing the inlet, and the exhaust port is communicated with the pipe body.
Specifically, the number of the triggering communicating vessels is multiple, and the number of the tube body and the filter membrane are equal to the number of the triggering communicating vessels; each trigger communicating vessel is respectively used for sealing the inlet of each pipe body.
Specifically, the trigger communicator comprises a communicating piece, a contact head and an elastic component;
one end of the communicating piece is plugged, a first opening is formed in the other end of the communicating piece, the air inlet is formed in the side wall of the communicating piece, and a first channel communicated with the first opening and the air inlet is formed in the communicating piece;
one end of the contact head is provided with a second opening, the air outlet is arranged at the other end of the contact head, a second channel which is communicated with the second opening and the air outlet is arranged in the contact head, and one end of the contact head is connected and communicated with the other end of the communicating piece;
the air guide channel comprises the first channel and the second channel;
the device comprises a pipe body, a contact head, a connecting piece, an elastic component, a connecting piece and a connecting piece, wherein the connecting piece is arranged on the wall of the chamber and is connected with the through hole in a sealing penetrating way;
when the trigger communicating vessel is in a non-working state, the contact head and the pipe body are in a separated state, and one end of the communicating member is sealed in the through hole; when the inlet of the pipe body pushes the contact head, the contact head seals the inlet of the pipe body, and the contact head drives the communicating piece to move inwards in the cavity so that the air inlet is communicated with the cavity, and at the moment, the elastic component has acting force towards the pipe body on the contact head;
wherein the contact is the trigger part.
Specifically, the contact head adopts an elastic sealing material; the other end of the contact head is spherical, the air outlet is positioned on the side face of the other end of the contact head, and when the contact head seals the inlet of the pipe body, a preset included angle is formed between the direction of the air outlet and the axial direction of the pipe body.
Specifically, a fixed sleeve is connected to the outer wall of the positive pressure chamber in a sealing way, two ends of the fixed sleeve are communicated, and the fixed sleeve is positioned at the through hole and is communicated with the through hole;
the communication piece is a communication rod, the communication rod penetrates into the fixed sleeve from the through hole, the communication rod is sealed with the fixed sleeve through a first sealing ring, and the other end of the contact head is positioned outside the fixed sleeve;
the elastic part is a spring, and the spring is sleeved on the outer wall of the fixed sleeve;
one end of the communication rod is sealed with the through hole through the second sealing ring.
Further, the filtering assembly further comprises a carrier for containing the pipe body, the carrier is detachably connected to the positive pressure chamber, the carrier comprises a cavity, two ends of the cavity are communicated, the pipe body is installed in the cavity, and the inner diameter size of the cavity is larger than the outer diameter size of the trigger communicating vessel;
when the carrier is connected with the positive pressure chamber, the inlet of the pipe body pushes the contact head so that the contact head seals the inlet of the pipe body, the exhaust port is communicated with the pipe body, and the contact head drives the communicating piece to move inwards in the cavity so that the air inlet is communicated with the inside of the cavity;
when the number of the triggering communicating vessels and the number of the pipe bodies are multiple, the carrier comprises a plurality of cavities which are mutually separated, and each pipe body is respectively arranged in each cavity.
Further, the filter further includes: the container chamber comprises a containing space, wherein the containing space is used for containing a sampling container, and corresponds to the filter membrane at the outlet of the tube body;
when the number of the cavities is plural, the container chamber includes plural holding spaces spaced apart from each other, each of the holding spaces corresponds to each of the cavities, respectively.
Specifically, the positive pressure chamber, the carrier and the container chamber are detachably connected in sequence from top to bottom;
the filter also comprises a support frame, wherein the support frame comprises a vertical rod, and a first support part, a second support part and a third support part which are sequentially connected with the vertical rod from top to bottom, wherein the first support part and the second support part are respectively and slidably connected with the vertical rod;
the positive pressure chamber is connected with the first supporting part, the carrier is detachably connected with the second supporting part, and the container chamber is detachably connected with the third supporting part.
Further, the filter further includes: the air pressure equipment comprises a pressure conveying part which is communicated with the cavity and used for providing air pressure into the cavity;
the pressure control device comprises a pressure measuring part and a pressure control part, wherein the pressure measuring part is communicated with the cavity and is used for measuring the pressure of positive pressure gas in the cavity, and the pressure control part is connected to a pressure sending part of the pneumatic equipment and is used for controlling the pressure value provided by the pressure sending part to the cavity.
Specifically, the air pressure equipment is a nitrogen cylinder, an air outlet of the nitrogen cylinder is the pressure feeding part, and the air outlet of the nitrogen cylinder is communicated with the cavity through a pipeline;
the pressure control device is a pressure regulating valve which is connected and communicated between the air outlet of the nitrogen cylinder and the chamber.
According to the filter provided by the embodiment of the invention, the positive pressure gas in the positive pressure chamber enters the gas guide channel from the gas inlet of the trigger communicating vessel under the condition that the trigger part of the trigger communicating vessel triggers and is discharged into the pipe body from the gas outlet of the trigger communicating vessel, so that the sealing of the trigger communicating vessel and the inlet of the pipe body is ensured, the positive pressure gas pushes the sample solution in the pipe body to the outlet of the pipe body, the sample solution passes through the filter membrane, in the operation process, the manual operation is less, the operation of manually pressing the injector in the prior art is not needed, the working strength of workers is reduced, and the working efficiency is improved; compared with the prior art, the filter can control the pressure of the sample solution by controlling the pressure of positive pressure gas, so that the condition that the strength caused by manual pressing is not easy to control is avoided, the phenomenon of rupture of a filter membrane caused by overlarge pressure is reduced, and the membrane passing rate of a sample is improved.
Drawings
FIG. 1 is a schematic diagram of a filter according to an embodiment of the present invention;
FIG. 2 is an enlarged view of a portion of FIG. 1A;
fig. 3 is a schematic structural diagram of a trigger communication device according to an embodiment of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
As shown in fig. 1 and 2, an embodiment of the present invention provides a filter, including: the positive pressure chamber 1 is internally provided with a chamber 11, and positive pressure gas is stored in the chamber 11; the trigger communicating vessel 2 is connected with the positive pressure chamber 1, an air inlet 21 and an air outlet 22 are arranged on the trigger communicating vessel 2, an air guide channel 23 which is communicated with the air inlet 21 and the air outlet 22 is arranged in the trigger communicating vessel 2, a trigger part 24 is arranged on the trigger communicating vessel 2, and the trigger part 24 is used for communicating the air inlet 21 with the chamber 11; the filter assembly 3, the filter assembly 3 includes a tube 31 and a filter membrane 32, the tube 31 has an inlet 311 and an outlet 312 which are in communication, the filter membrane 32 is in communication with the outlet 312, the trigger communicating vessel 2 is used for sealing in the inlet 311, and the exhaust port 22 is in communication with the tube 31.
The positive pressure gas stored in the chamber 11 of the positive pressure chamber 1 may be filled with the positive pressure gas in the chamber 11, or may be pushed into the chamber by a piston structure (e.g., a cylinder) so that the gas in the chamber is compressed to have a positive pressure.
The trigger communicating vessel 2 has the function that when the trigger part 24 is triggered, the air inlet 21 of the trigger communicating vessel 2 is communicated with the chamber 11, so that the air in the chamber 11 can enter the air guide channel 23 from the air inlet 21 of the trigger communicating vessel 2 and then is discharged from the air outlet 22; the triggering part can be designed to be connected with a valve at the air inlet and the like to be used as a switch of the air inlet, the valve can be driven in an electric or pneumatic mode (not shown in the figure), or the air inlet can be controlled to be communicated with the cavity through a mechanical action and the like.
The tube body 31 may be an outer tube of a syringe, the filter membrane 32 is inserted into an injection end of the outer tube of the syringe (i.e. the outlet 312 of the tube body 31), the sample solution may be filled into the tube body 31 in advance, or a liquid feeding conduit (not shown) may be provided on a side wall of the tube body, the sample solution is fed into the tube body through the liquid feeding conduit, and then the liquid feeding conduit is plugged, so long as the sample solution can be filled into the tube body, which is not particularly limited herein; when the filter works, the trigger communicating vessel 2 is sealed with the inlet 311 of the pipe body 31, and when positive pressure gas is discharged from the exhaust port 22 of the trigger communicating vessel 2 into the pipe body 31, the positive pressure gas pushes the sample solution in the pipe body 31 to make the sample solution pass through the filter membrane 32, and the sampling container 4 can be placed below the filter membrane 32 to hold the sample solution communicated with the filter membrane.
Embodiments of the present invention will be specifically described below by the principle of operation of the filter. The sample solution is filled into the tube body 31, the trigger communicating vessel 2 is sealed with the inlet 311 of the tube body 31, the air inlet 21 of the trigger communicating vessel 2 is communicated with the chamber 11 through the trigger part 24, positive pressure gas in the chamber 11 enters the air guide channel 23 from the air inlet 21 of the trigger communicating vessel 2 and is discharged into the tube body 31 from the air outlet 22, the sample solution in the tube body 31 passes through the filter membrane 32 under the pressure of the positive pressure gas, and the sample solution communicated with the filter membrane 32 can be filled by the sampling container 4. In the above process, the sample solution flows into the tube body 31 through the positive pressure gas in the chamber 11 to push the sample solution to pass through the filter membrane 32, so that the operation of pressing the syringe in the prior art is omitted, the manual operation is reduced, the working strength of staff is reduced, and the working efficiency is improved.
According to the filter provided by the embodiment of the invention, the positive pressure gas in the positive pressure chamber enters the gas guide channel from the gas inlet of the trigger communicating vessel under the condition that the trigger part of the trigger communicating vessel triggers and is discharged into the pipe body from the gas outlet of the trigger communicating vessel, so that the sealing of the trigger communicating vessel and the inlet of the pipe body is ensured, the positive pressure gas pushes the sample solution in the pipe body to the outlet of the pipe body, the sample solution passes through the filter membrane, in the operation process, the manual operation is less, the operation of manually pressing the injector in the prior art is not needed, the working strength of workers is reduced, and the working efficiency is improved; compared with the prior art, the filter can control the pressure of the sample solution by controlling the pressure of positive pressure gas, so that the condition that the strength caused by manual pressing is not easy to control is avoided, the phenomenon of rupture of a filter membrane caused by overlarge pressure is reduced, and the membrane passing rate of a sample is improved.
Specifically, the number of the triggering communicating vessels 2 is a plurality, and the number of the tube bodies 31 and the filter membranes 32 is equal to the number of the triggering communicating vessels 2; each trigger communication 2 is adapted to be sealed to an inlet 311 of each tubular body 31, respectively. Be provided with a plurality of trigger intercommunication ware 2 and body 31, with every trigger intercommunication ware 2 and every body 31 one-to-one, every filter membrane 32 is respectively in the export 312 of every body 31 in one-to-one intercommunication, then can carry out the operation of film coating in batches simultaneously, once only can pass a plurality of die sample, improves work efficiency.
Specifically, with reference to fig. 3, the trigger communication 2 includes the communication piece 25, the contact 241, and the elastic member 26; one end 251 of the communicating member 25 is plugged, the other end 252 of the communicating member 25 is provided with a first opening, the air inlet 21 is arranged on the side wall of the communicating member 25, and a first channel 253 communicated with the first opening 252 and the air inlet 21 is arranged in the communicating member 25; one end 242 of the contact 241 is provided with a second opening, the exhaust port 22 is arranged at the other end of the contact 241, a second channel 243 which is communicated with the second opening and the exhaust port 22 is arranged in the contact 241, and one end 242 of the contact 241 is connected and communicated with the other end 252 of the communicating piece 25; the air guide passage 23 includes a first passage 253 and a second passage 243; in fig. 2, a through hole 12 is arranged on the wall of the chamber 11, the communicating piece 25 is connected with the through hole 12 in a sealing way, the contact head 241 is positioned outside the positive pressure chamber 1, an elastic component 26 is arranged between the contact head 241 and the positive pressure chamber 1, the contact head 241 is provided with a sealing part, and the size of the sealing part is larger than that of the inlet 311 of the pipe body 31; when the trigger communicating vessel 2 is in a non-working state, the contact head 241 is in a separated state with the pipe body 31, and one end 251 of the communicating member 25 seals the through hole 12; when the inlet 311 of the tube 31 pushes the contact 241, the contact 241 seals the inlet 311 of the tube 31, and the contact 241 drives the communicating member 25 to move into the chamber 11, so that the air inlet 21 communicates with the chamber 11, and the elastic member 26 has a force towards the tube 31 against the contact 241; the contact 241 is the trigger portion 24.
In the above, the communicating member 25 is sealed and connected to the through hole 12, that is, when the communicating member 25 is stationary or moving relative to the through hole 12, the communicating member 25 is always sealed with the through hole 12 so that the positive pressure gas does not leak out from the through hole 12. When the filter does not work, the trigger communicating vessel 2 is in a non-working state, the contact head 241 is in a separated state with the pipe body 31, one end of the communicating piece 25 is used for blocking the through hole 12, positive pressure gas in the cavity 11 cannot flow out of the cavity 11 at the moment, when the membrane passing operation is needed, the inlet 311 of the pipe body 31 is pushed to the contact head 241, the contact head 241 seals the inlet 311 of the pipe body 31, the contact head 241 drives the communicating piece 25 connected with the contact head to move into the cavity 11, the gas inlet 21 is communicated with the cavity 11, positive pressure gas enters the first channel 253 from the gas inlet 21, passes through the second channel 243, and then flows out of the gas outlet 22 at the other end of the contact head 241 into the pipe body 31, so that sample solution in the pipe body 31 is pushed to pass through the filter membrane 32; after the sample solution passes through the filter membrane 32, the tube 31 is removed to separate the contact head 241 from the tube 31, so that the contact head 241 is restored to the original position under the action of the elastic component 26, and the contact head 241 drives the communicating element 25 to move to a position for blocking the through hole 12, and at this time, the positive pressure gas in the chamber 11 does not flow out of the chamber 11. Wherein, when the number of the tube bodies 31 is one, the hand-held tube bodies can be adopted to push the contact heads 241 of the trigger communicating vessel 2; when the number of the tube bodies 31 is plural, the carrier 33 can be used to load the plural tube bodies 31, the carrier 33 can be detachably connected to the positive pressure chamber 1, so as to facilitate batch film passing operation, and of course, when the number of the tube bodies 31 is plural, the carrier 33 can also be used to load the tube bodies.
Specifically, the contact 241 is made of an elastic sealing material, such as a rubber material, so that the sealing between the contact 241 and the pipe inlet 311 is more effectively ensured.
The other end of the contact 241 is spherical, the exhaust port 22 is located on the side of the other end of the contact 241, and when the contact 241 seals the inlet 311 of the pipe 31, a preset included angle is formed between the direction of the exhaust port 22 and the axial direction of the pipe 31. When the positive pressure gas is discharged from the gas outlet 22 of the contact 241 into the tube 31, since the direction of the gas outlet 22 is not in the same straight line direction with the axial direction of the tube 31, the positive pressure gas discharged from the gas outlet 22 is prevented from directly causing a large impact on the sample solution in the tube 31, so as to prevent the sample solution from being impacted and splashed, thereby realizing a smooth filtering membrane of the sample solution.
Specifically, referring to fig. 2 and 3, a fixing sleeve 27 is connected on the outer wall of the positive pressure chamber 1 in a sealing manner, two ends of the fixing sleeve 27 are communicated, and the fixing sleeve 27 is positioned at the through hole 12 and is communicated with the through hole 12; the communicating piece 25 is a communicating rod, the communicating rod penetrates into the fixed sleeve 27 from the through hole 12, the communicating rod and the fixed sleeve 27 are sealed through the first sealing ring 28, and the other end of the contact head 241 is positioned outside the fixed sleeve 27; the fixing sleeve 27 guides and protects the communication member 25 (i.e. the communication rod) so that the communication member 25 can move smoothly and is not damaged easily, the contact head 241 is located outside the fixing sleeve 27, and the contact head 241 can drive the communication member 25 to move relative to the fixing sleeve 27. Since the communication member 25 is sealed with the fixing sleeve 27 by the first seal ring 28 and the fixing sleeve 27 is connected to the through hole 12 in a sealing manner, the positive pressure gas in the chamber 11 does not leak out from the through hole 12.
The elastic part 26 is a spring, and the spring is sleeved on the outer wall of the fixed sleeve 27; the spring can be a compression spring, is sleeved on the outer wall of the fixed sleeve 27 and is positioned between the positive pressure chamber 1 and the contact 241, and the spring is compressed or reset along the axial direction of the fixed sleeve 27, so that the spring is smoothly compressed and deformed.
The space between one end of the communication rod and the through hole 12 is sealed by a second sealing ring 29. Wherein, the through-hole 12 can be plugged off to the one end of communicating rod, realizes the more effectual shutoff of communicating rod to through-hole 12 through the second sealing washer 29.
Specifically, the filtering assembly 3 further comprises a carrier 33 for containing the pipe body 31, the carrier 33 is detachably connected to the positive pressure chamber 1, the carrier 33 comprises a cavity 331, two ends of the cavity 311 are communicated, the pipe body 31 is installed in the cavity 311, and the inner diameter of the cavity 311 is larger than the outer diameter of the trigger communicating vessel 2; when the carrier 33 is connected with the positive pressure chamber 1, the inlet 311 of the pipe body 31 presses the contact head 241, so that the contact head 241 seals the inlet 311 of the pipe body 31, the exhaust port 22 is communicated with the pipe body 31, and the contact head 241 drives the communicating member 25 to move into the chamber 11, so that the air inlet 21 is communicated with the chamber 11. Wherein, carrier 33 holds body 31, connect carrier 33 in the in-process of malleation room 1, body 31 bulldozes contact 241, drive the communicating member 25 and remove to the cavity 11, make gas inlet 21 and cavity 11 intercommunication, contact 241 seals the import 311 of body 31 this moment, make the positive pressure gas in the cavity 11 pass through communicating member 25 and contact 241 in proper order and arrange to body 31 in, thereby bulldoze the sample solution in the body 31 and pass through filter membrane 32, after accomplishing the sample filtration membrane, remove carrier 33, then body 31 separates with contact 241, contact 241 resets under the effort of elastomeric element 26, and drive communicating member 25 and reset, the through-hole 12 of malleation room 1 is resealed to one end of communicating member 25.
When the number of the trigger communicating vessel 2 and the tube body 31 is plural, the carrier 33 includes plural cavities 331 spaced apart from each other, and each tube body 31 is respectively fitted into each cavity 331. If the number of samples is plural, but less than the number of the cavities 331, the tube 31 can be installed in the cavities 331 equal to the number of samples, and since the inner diameter of the cavity 331 is larger than the outer diameter of the trigger communicating vessel 2, when the carrier 33 is connected, the contact head 241 of the trigger communicating vessel 2 extends into the cavity 331 for the cavity 331 without installing the tube 31, the contact head 241 is not pushed, the communicating member 25 is not moved, one end 251 of the communicating member 25 always blocks the through hole 12, so that positive pressure gas in the cavity 11 is not leaked, and the normal sample solution passing through the filter membrane 32 is ensured.
Further, the filter further includes: a container chamber 5, the container chamber 5 comprising a holding space for placing the sampling container 4, the holding space corresponding to the filter membrane 32 at the tube outlet 312; the sample container 4 is placed in the holding space so that the sample solution passing through the filter membrane 32 flows into the sample container 4 for sampling analysis.
When the number of the cavities 331 is plural, the container room 5 includes plural holding spaces partitioned from each other, each of the holding spaces corresponding to each of the cavities 331, respectively. The number of holding spaces may be designed to be equal to the number of the cavities 331, and the sampling container 4 is placed in the corresponding holding space of the cavity 331 in which the tube body 31 is installed, so as to take the sample solution passing through the filter membrane 32.
Specifically, the positive pressure chamber 1, the carrier 33, and the container chamber 5 are detachably connected in this order from top to bottom; after each sample filtration membrane operation, the carrier 33 and the vessel chamber 5 are removed to replace the carrier 33 with a new tube 31 and filter membrane 32 and the vessel chamber 5 with the empty sampling vessel 4 placed therein, and the next sample filtration membrane operation is prepared.
The filter further comprises a support frame 6, wherein the support frame 6 comprises a vertical rod 61, and a first support part 62, a second support part 63 and a third support part 64 which are sequentially connected to the vertical rod 61 from top to bottom, and the first support part 62 and the second support part 63 are respectively and slidably connected to the vertical rod 61; the positive pressure chamber 1 is connected to the first support 62, the carrier 33 is detachably connected to the second support 63, and the container chamber 5 is detachably connected to the third support 64. The first supporting part 62 and the second supporting part 63 can slide relative to the upright rod 61, so that the positive pressure chamber 1 connected to the first supporting part 62 and the carrier 33 connected to the second supporting part 63 can be conveniently and respectively adjusted in position, and the operation is convenient, wherein the carrier 33 is detachably connected with the positive pressure chamber 1 through the second supporting part 63, the second supporting part 63 and the carrier 33 can be connected in a hanging manner, the third supporting part 64 and the container chamber 5 can be connected in a clamping manner, the operation is simple and easy, or the carrier 33 and the container chamber 5 can be detachably connected through bolts. The support frame 6 enables the relative position adjustment among the positive pressure chamber 1, the carrier 33 and the container chamber 5 to be convenient and quick, and the carrier 33 and the container chamber 5 to be convenient to assemble and disassemble.
Further, the filter further includes: the air pressure device 7, the air pressure device 7 comprises a pressure delivering part 71, the pressure delivering part 71 is communicated with the chamber 11 and is used for providing air pressure to the chamber 11; the pressure control device 8, the pressure control device 8 includes a pressure measuring part and a pressure control part (not shown in the figure), the pressure measuring part is communicated with the chamber 11 for measuring the pressure of the positive pressure gas in the chamber 11, and the pressure control part is connected to the pressure delivering part 71 of the gas pressure equipment 7 for controlling the value of the gas pressure provided by the pressure delivering part 71 into the chamber 11. The air pressure device 7 provides air pressure in the chamber 11, so that positive pressure air is stored in the chamber 11, the air pressure device 7 can be an air bottle or a piston structure (such as an air cylinder), the pressure control device 8 is used for controlling the air pressure in the chamber 11, and the excessive or insufficient pressure is avoided, so that the sample solution can smoothly pass through the filter membrane when the positive pressure air pushes the sample solution in the tube 31, and the air pressure device is particularly suitable for smooth implementation of the large-scale batch filter membrane 32.
Specifically, the air pressure device 7 is a nitrogen cylinder, an air outlet of the nitrogen cylinder is a pressure feeding part 71, and the air outlet of the nitrogen cylinder is communicated with the chamber 11 through a pipeline 72; the pressure control device 8 is a pressure regulating valve which is connected and communicated between the air outlet of the nitrogen cylinder and the chamber 11. The pressure regulating valve detects the nitrogen pressure discharged by the nitrogen cylinder, the air pressure value discharged to the chamber 11 from the air outlet of the nitrogen cylinder is regulated according to the pressure, the air pressure value discharged to the chamber 11 from the air outlet of the nitrogen cylinder can be a preset pressure value through the pressure regulating valve, and the air pressure value in the chamber 11 can be regulated and controlled by controlling the pressure regulating valve at any time according to the actual condition of the site.
According to the filter provided by the embodiment of the invention, under the condition that the trigger part of the trigger communicating vessel triggers, positive pressure gas in the cavity of the positive pressure chamber enters the air guide channel from the air inlet of the trigger communicating vessel and is discharged into the pipe body from the air outlet of the trigger communicating vessel, so that the sealing of the trigger communicating vessel and the inlet of the pipe body is ensured, and then the positive pressure gas pushes sample solution in the pipe body to the outlet of the pipe body, so that the sample solution passes through the filter membrane; compared with the prior art, the filter can control the pressure of the sample solution by controlling the pressure of positive pressure gas, so that the condition that the strength caused by manual pressing is not easy to control is avoided, the phenomenon of rupture of a filter membrane caused by overlarge pressure is reduced, and the membrane passing rate of a sample is improved.
The above description is only of the preferred embodiments of the present invention, and is not intended to limit the present invention in any way, but any simple modification, equivalent variation and modification made to the above embodiments according to the technical substance of the present invention still fall within the scope of the technical solution of the present invention.
Claims (9)
1. A filter, comprising:
the positive pressure chamber is internally provided with a chamber, and the chamber is used for storing positive pressure gas;
the trigger communication device is connected to the positive pressure chamber and comprises a communication piece, a contact head and an elastic component, wherein an air inlet and an air outlet are formed in the trigger communication device, an air guide channel for communicating the air inlet with the air outlet is formed in the trigger communication device, a trigger part is arranged on the trigger communication device, and the trigger part is used for enabling the air inlet to be communicated with the chamber;
the filter assembly comprises a pipe body and a filter membrane, wherein the pipe body is provided with an inlet and an outlet which are communicated, a liquid delivery conduit is arranged on the side wall of the pipe body, the filter membrane is communicated with the outlet, the trigger communication device is used for sealing the inlet, and the exhaust port is communicated with the pipe body;
one end of the communicating piece is plugged, a first opening is formed in the other end of the communicating piece, the air inlet is formed in the side wall of the communicating piece, and a first channel communicated with the first opening and the air inlet is formed in the communicating piece;
one end of the contact head is provided with a second opening, the air outlet is arranged at the other end of the contact head, a second channel which is communicated with the second opening and the air outlet is arranged in the contact head, and one end of the contact head is connected and communicated with the other end of the communicating piece;
the air guide channel comprises the first channel and the second channel;
the device comprises a pipe body, a contact head, a connecting piece, an elastic component, a connecting piece and a connecting piece, wherein the connecting piece is arranged on the wall of the chamber and is connected with the through hole in a sealing penetrating way;
when the trigger communicating vessel is in a non-working state, the contact head and the pipe body are in a separated state, and one end of the communicating member is sealed in the through hole; when the inlet of the pipe body pushes the contact head, the contact head seals the inlet of the pipe body, and the contact head drives the communicating piece to move inwards in the cavity so that the air inlet is communicated with the cavity, and at the moment, the elastic component has acting force towards the pipe body on the contact head;
wherein the contact is the trigger part.
2. The filter of claim 1, wherein the filter is configured to filter the fluid,
the number of the triggering communicating vessels is multiple, and the number of the tube body and the filter membrane are equal to the number of the triggering communicating vessels;
each trigger communicating vessel is respectively used for sealing the inlet of each pipe body.
3. The filter of claim 1, wherein the filter is configured to filter the fluid,
the contact head is made of an elastic sealing material;
the other end of the contact head is spherical, the air outlet is positioned on the side face of the other end of the contact head, and when the contact head seals the inlet of the pipe body, a preset included angle is formed between the direction of the air outlet and the axial direction of the pipe body.
4. A filter according to claim 3, wherein,
the outer wall of the positive pressure chamber is connected with a fixed sleeve in a sealing manner, two ends of the fixed sleeve are communicated, and the fixed sleeve is positioned at the through hole and is communicated with the through hole;
the communication piece is a communication rod, the communication rod penetrates into the fixed sleeve from the through hole, the communication rod is sealed with the fixed sleeve through a first sealing ring, and the other end of the contact head is positioned outside the fixed sleeve;
the elastic part is a spring, and the spring is sleeved on the outer wall of the fixed sleeve;
one end of the communication rod is sealed with the through hole through a second sealing ring.
5. The filter of claim 1, wherein the filter is configured to filter the fluid,
the filter assembly further comprises a carrier for containing the pipe body, the carrier is detachably connected to the positive pressure chamber, the carrier comprises a cavity, two ends of the cavity are communicated, the pipe body is arranged in the cavity, and the inner diameter of the cavity is larger than the outer diameter of the trigger communicating vessel;
when the carrier is connected with the positive pressure chamber, the inlet of the pipe body pushes the contact head so that the contact head seals the inlet of the pipe body, the exhaust port is communicated with the pipe body, and the contact head drives the communicating piece to move inwards in the cavity so that the air inlet is communicated with the inside of the cavity;
when the number of the triggering communicating vessels and the number of the pipe bodies are multiple, the carrier comprises a plurality of cavities which are mutually separated, and each pipe body is respectively arranged in each cavity.
6. The filter of claim 5, further comprising:
the container chamber comprises a containing space, wherein the containing space is used for containing a sampling container, and corresponds to the filter membrane at the outlet of the tube body;
when the number of the cavities is plural, the container chamber includes plural holding spaces spaced apart from each other, each of the holding spaces corresponds to each of the cavities, respectively.
7. The filter according to claim 6, wherein the filter is configured to filter the filter media,
the positive pressure chamber, the carrier and the container chamber are detachably connected in sequence from top to bottom;
the filter also comprises a support frame, wherein the support frame comprises a vertical rod, and a first support part, a second support part and a third support part which are sequentially connected with the vertical rod from top to bottom, wherein the first support part and the second support part are respectively and slidably connected with the vertical rod;
the positive pressure chamber is connected with the first supporting part, the carrier is detachably connected with the second supporting part, and the container chamber is detachably connected with the third supporting part.
8. The filter of claim 1 or 7, further comprising:
the air pressure equipment comprises a pressure conveying part which is communicated with the cavity and used for providing air pressure into the cavity;
the pressure control device comprises a pressure measuring part and a pressure control part, wherein the pressure measuring part is communicated with the cavity and is used for measuring the pressure of positive pressure gas in the cavity, and the pressure control part is connected to a pressure sending part of the pneumatic equipment and is used for controlling the pressure value provided by the pressure sending part to the cavity.
9. The filter of claim 8, wherein the filter is configured to filter the fluid,
the air pressure equipment is a nitrogen cylinder, an air outlet of the nitrogen cylinder is the pressure feeding part, and the air outlet of the nitrogen cylinder is communicated with the cavity through a pipeline;
the pressure control device is a pressure regulating valve which is connected and communicated between the air outlet of the nitrogen cylinder and the chamber.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710258604.XA CN108722188B (en) | 2017-04-19 | 2017-04-19 | Filter device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710258604.XA CN108722188B (en) | 2017-04-19 | 2017-04-19 | Filter device |
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| CN108722188A CN108722188A (en) | 2018-11-02 |
| CN108722188B true CN108722188B (en) | 2024-04-12 |
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| CN116530500B (en) * | 2023-06-26 | 2023-09-29 | 青岛市黄岛区中心医院 | Preservation device of nail emulsion surgical operation biopsy sample |
| CN117815918B (en) * | 2024-03-05 | 2024-05-31 | 上海奔曜科技有限公司 | Positive pressure filter equipment |
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| CN101005894A (en) * | 2004-09-30 | 2007-07-25 | 富士胶片株式会社 | Composite filter cartridge, arranging frame for fliter cartridge and recovery container |
| CN203990983U (en) * | 2013-12-24 | 2014-12-10 | 闫志峰 | A kind of atomizing sprayer |
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| CN206676235U (en) * | 2017-04-19 | 2017-11-28 | 新疆农业科学院农业质量标准与检测技术研究所 | Filter |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005003346A1 (en) * | 2003-06-06 | 2005-01-13 | Applera Corporation | Purification device for ribonucleic acid in large volumes, and method |
| EP1882524A4 (en) * | 2005-05-17 | 2010-09-08 | Universal Bio Research Co Ltd | Filter processing method, filter encapsulation chip, and filter processing device |
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|---|---|---|---|---|
| CN101005894A (en) * | 2004-09-30 | 2007-07-25 | 富士胶片株式会社 | Composite filter cartridge, arranging frame for fliter cartridge and recovery container |
| CN203990983U (en) * | 2013-12-24 | 2014-12-10 | 闫志峰 | A kind of atomizing sprayer |
| CN204710118U (en) * | 2015-06-16 | 2015-10-21 | 中国石油化工股份有限公司 | A kind of reinjected water detects uses improved portable miniature film filter |
| CN205995282U (en) * | 2016-08-30 | 2017-03-08 | 新疆农业科学院农业质量标准与检测技术研究所 | Just pressing through membrane device |
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