Suction filtration cup seat and suction filtration device

Abstract

The utility model relates to a suction filtration cup seat, the top of the suction filtration cup seat is provided with a suction filtration cup mounting part for mounting a suction filtration cup, the suction filtration cup mounting part is provided with a suction filtration hole and an air supply hole, the suction filtration hole and the air supply hole can be respectively communicated with a liquid outlet of the suction filtration cup mounted on the suction filtration cup mounting part, and the aperture of the air supply hole is less than or equal to 5mm. The utility model further provides a suction filtration device, the possibility that the air supplementing hole is polluted by liquid can be reduced, and the possibility that the suction filtration cup is polluted in the air supplementing process is further reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of suction filtration, in particular to a suction filtration cup seat and a suction filtration device. Background Art

[0002] The membrane filtration method uses a filter membrane with a certain pore size to intercept microorganisms from the liquid, and then places the filter membrane on the corresponding culture medium plate to allow the microorganisms to multiply and grow into colonies on the filter membrane, and finally count and identify them.

[0003] A filtration cup and filtration device are often used in membrane filtration. The filtration device is provided with a filtration cup holder for supporting and connecting the filtration cup. After filtration is completed, negative pressure still exists between the filtration cup and the filtration cup holder, making it difficult for the operator to directly remove the filtration cup.

[0004] To facilitate removal of the filter cup after filtration, the filter device can be used to replenish air to eliminate the negative pressure between the filter cup and the filter cup holder. When replenishing air, the air supplied between the filter cup and the filter cup holder by the filter device may carry contaminants such as aerosols and water mist within the filter pipe of the filter device. These contaminants can easily enter the filter cup through the drain port of the filter cup, causing contamination and adversely affecting the test results.

[0005] Therefore, there is a technology that provides an air-increasing hole on the filter cup seat. After the filtration is completed, the air-increasing hole is used to replenish air between the filter cup and the filter cup seat to eliminate the negative pressure between the filter cup and the filter cup seat. Since the air-increasing hole and the filtration pipe of the filtration device are independently provided, the pollutants that may exist in the filtration pipe will not enter between the filter cup and the filter cup seat through the air-increasing hole, which can reduce the possibility of the filter cup being contaminated.

[0006] However, during use, it was discovered that even with the air supply holes installed on the filter cup holder, the filter cup could still become contaminated during the air supply process. Analysis revealed that when liquid is present on the filter cup holder, it can easily enter the air supply holes, causing them to become contaminated. After filtration is complete, the filter cup can also become contaminated when air is supplied between the filter cup and the holder through the contaminated air supply holes. Utility Model Content

[0007] The utility model aims to provide a suction filter cup seat and a suction filter device, so as to reduce the possibility of the suction filter cup being contaminated during the gas replenishment process.

[0008] The utility model describes a filter cup seat, wherein a filter cup mounting portion for mounting a filter cup is provided on the top of the filter cup seat, and the filter cup mounting portion is provided with a filter hole and an air supply hole, and the filter hole and the air supply hole can respectively communicate with the discharge port of the filter cup mounted on the filter cup mounting portion, and the aperture of the air supply hole is less than or equal to 5 mm.

[0009] Optionally, the diameter of the air supply hole is 0.5 to 1.5 mm.

[0010] Optionally, the diameter of the air supply hole is 1 mm.

[0011] Optionally, the filter cup mounting portion is provided with a seat surface surrounding the periphery of the filter hole, the seat surface is an inclined surface sloping downward from the outside to the inside, and the output end of the air supply hole is provided on the inclined surface.

[0012] Optionally, a sealing portion for sealingly connecting with the filter cup is provided around the periphery of the seat surface, or a sealing member installation groove for installing a sealing member is provided around the periphery of the seat surface.

[0013] The utility model also provides a suction filtration device, comprising any one of the above-mentioned suction filtration cup holders.

[0014] Optionally, a valve for controlling the opening and closing of the air supply hole is also included.

[0015] Optionally, a pipeline connecting the valve and the air supply hole is also included.

[0016] Optionally, the valve is a solenoid valve.

[0017] Optionally, an air filter is further included that is arranged upstream of the air supply hole.

[0018] The utility model can reduce the possibility that the air supply hole is contaminated by liquid, thereby reducing the possibility that the filter cup is contaminated during the air supply process. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 Schematic diagram of the structure of the filtration cup seat described in some embodiments

[0020] Figure 2 It is a structural schematic diagram of a part of the structure of the filtration device described in some embodiments;

[0021] Figure 3 It is a structural schematic diagram of part of the structure of the filtration device described in another embodiment.

[0022] 1-Filter cup seat; 2-Filter hole; 3-Seat surface; 4-Air supply hole; 5-Pipeline; 6-Valve; 7-Seal installation slot; 8-Air filter. DETAILED DESCRIPTION

[0023] The following describes the embodiments of the present invention with reference to the accompanying drawings and preferred embodiments. Those skilled in the art will readily understand the other advantages and benefits of the present invention from the disclosure herein. The present invention may also be implemented or applied through various other specific embodiments, and the details in this specification may be modified or altered based on different perspectives and applications without departing from the spirit of the present invention. It should be understood that the preferred embodiments are intended solely to illustrate the present invention and are not intended to limit the scope of protection of the present invention.

[0024] It should be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present invention. Therefore, the drawings only show components related to the present invention and are not drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component can be changed at will, and the component layout type may also be more complicated.

[0025] like Figure 1 A filtration cup holder 1 is shown in the figure. The top of the filtration cup holder 1 is provided with a filtration cup mounting portion for mounting a filtration cup. The filtration cup mounting portion is provided with a filtration hole 2 and an air-injection hole 4. The filtration hole 2 and the air-injection hole 4 can respectively communicate with the discharge port of the filtration cup mounted on the filtration cup mounting portion. The aperture of the air-injection hole 4 is less than or equal to 5 mm. When the filtration cup holder 1 is used in a filtration device, the filtration hole 2 is connected to the vacuum pump through a filtration pipe. The vacuum pump is used to evacuate air to form a negative pressure, so that the liquid in the sample in the filtration cup is extracted under the action of the negative pressure. The air-injection hole 4 is used to infuse air into the negative pressure area between the filtration cup and the filtration cup holder 1 after the filtration is completed, so as to relieve the negative pressure between the filtration cup and the filtration cup holder 1, so that the operator can more easily remove the filtration cup.

[0026] In the above-described technical solution, a gas-injection hole 4 having a diameter of 5 mm or less is used. This relatively small diameter allows liquid to be supported on the upper side of the gas-injection hole 4 when the filter cup mounting portion is exposed to the liquid due to its surface tension, significantly reducing the likelihood of liquid flowing into the gas-injection hole 4. By reducing the likelihood of liquid flowing into the gas-injection hole 4, the likelihood of liquid contamination of the gas-injection hole 4 can be reduced, thereby further reducing the likelihood of contamination of the filter cup during the gas-injection process.

[0027] In some embodiments, the diameter of the air-filling hole 4 is 0.5 to 1.5 mm. Experimental results show that a diameter of 0.5 to 1.5 mm can effectively prevent liquid from entering the air-filling hole 4. The diameter of the air-filling hole 4 is also easy to process. In specific implementations, the diameter of the air-filling hole 4 can be 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, 1 mm, 1.1 mm, 1.2 mm, 1.3 mm, 1.4 mm, or 1.5 mm.

[0028] As a preferred example, the diameter of the air-filling hole 4 is 1 mm. The 1 mm air-filling hole 4 is easy to process and can meet the requirement of preventing liquid from entering.

[0029] In some embodiments, the filter cup mounting portion is provided with a seat surface 3 surrounding the outer periphery of the filter hole 2. The seat surface 3 is a sloped surface that slopes downward from the outside to the inside, and the output end of the air supply hole 4 is provided on the sloped surface. The placement of the air supply hole 4 on the sloped surface can promote the downward flow of liquid, reduce the possibility of liquid lingering at the air supply hole 4, and help reduce the possibility of liquid entering the air supply hole 4. In a specific implementation, the inner side of the seat surface 3 extends to the filter hole 2, and the seat surface 3 can guide the liquid to flow into the filter hole 2.

[0030] In some embodiments, a sealing portion for sealingly connecting with the filter cup is provided around the periphery of the seat surface 3, or a sealing member installation groove 7 for installing a sealing member is provided around the periphery of the seat surface 3. By providing a sealing portion or installing a sealing member in the sealing member installation groove 7, when the filter cup is mounted on the filter cup installation portion, the filter cup cooperates with the sealing portion or the sealing member to form a seal, which can ensure the filtration effect. As a specific example, the filter cup installation portion is a filter cup installation groove provided on the top of the filter cup seat 1, the filtration hole 2 is provided at the center of the bottom wall of the filter cup installation groove, the sealing member installation groove 7 and the seat surface 3 are provided on the bottom wall of the filter cup installation groove, and the seal can be a sealing ring or a sealing gasket.

[0031] In some embodiments, the present invention further provides a filtration device, comprising any of the above-mentioned filtration cup holders 1. In specific implementation, the filtration cup holder 1 is usually installed on the top of the filtration device, and multiple filtration cup holders 1 can be installed on the filtration device.

[0032] In some embodiments, as Figure 2 As shown, the filtration device also includes a valve 6 for controlling the opening and closing of the air-injection hole 4. By adopting the above-mentioned structure of the filtration cup seat 1 composed of the valve 6 and the filtration cup seat 1, the valve 6 can close the air-injection hole 4 during the filtration process to prevent the air-injection hole 4 from having an adverse effect on the filtration. The valve 6 can open the air-injection hole 4 after the filtration is completed, and use the air-injection hole 4 to replenish air between the filtration cup and the filtration cup seat 1 to relieve the negative pressure between the filtration cup and the filtration cup seat 1, so that the operator can more easily remove the filtration cup. In specific implementation, the valve 6 can use a solenoid valve, such as a solenoid switch valve, which has the characteristic of being easy to control.

[0033] In some embodiments, the filtration device further includes a pipeline 5 connecting the valve 6 and the air supply hole 4. The provision of the pipeline 5 can reduce the requirements for the installation location of the valve 6. In a specific implementation, the pipeline 5 can be a hose. The electromagnetic switch valve can be fixedly mounted on the housing of the filtration device, and the hose is used to connect the electromagnetic switch valve and the input end of the air supply hole 4. When the electromagnetic switch valve is open, the negative pressure area between the filtration cup and the filtration cup holder 1 can be connected to the atmosphere through the air supply hole 4, the hose, and the electromagnetic switch valve. When the electromagnetic switch valve is closed, the electromagnetic switch valve isolates the air supply hole 4 from the atmosphere.

[0034] In some embodiments, the filtration device further includes an air filter 8 disposed upstream of the air supply hole 4. The air filter 8 can prevent pollutants in the air from entering the area between the filtration cup and the filtration cup seat 1 through the air supply hole 4. Figure 3 As shown, an air filter 8 can be installed on the pipeline 5.

[0035] It should be noted that this application mainly improves the filtration cup seat 1 of the filtration device and the air supply structure related to the filtration cup seat 1. The other structures and components of the filtration device can be implemented with reference to the filtration device in the prior art, for example, with reference to the fully automatic membrane filtration machine disclosed in the patent application with publication number CN107158955A, which will not be elaborated here.

[0036] The above embodiments are merely preferred embodiments for fully illustrating the present invention, and the scope of protection of the present invention is not limited thereto. Equivalent substitutions or transformations made by those skilled in the art on the basis of the present invention are all within the scope of protection of the present invention. In the description of this specification, the descriptions with reference to the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" etc. mean that the specific features, structures, materials or characteristics of the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification.

Claims

1. A suction filtration cup holder, characterized in that: A filter cup mounting portion for mounting a filter cup is provided on the top of the filter cup seat, and the filter cup mounting portion is provided with a filter hole and an air supply hole. The filter hole and the air supply hole can respectively communicate with the discharge port of the filter cup installed on the filter cup mounting portion, and the aperture of the air supply hole is less than or equal to 5 mm.

2. The suction cup holder according to claim 1, characterized in that: The diameter of the air-replenishing hole is 0.5 to 1.5 mm.

3. The suction cup holder according to claim 2, characterized in that: The diameter of the air-replenishing hole is 1 mm.

4. The suction cup holder according to claim 1, characterized in that: The filter cup mounting portion is provided with a seat surface surrounding the periphery of the filter hole. The seat surface is an inclined surface sloping downward from the outside to the inside. The output end of the air supply hole is provided on the inclined surface.

5. The suction cup holder according to claim 4, characterized in that: A sealing portion for sealingly connecting with the filter cup is arranged around the periphery of the seat surface, or a sealing member installation groove for installing a sealing member is arranged around the periphery of the seat surface.

6. A filtration device, characterized in that: The invention comprises the suction cup seat according to any one of claims 1 to 5.

7. The filtration device according to claim 6, characterized in that It also includes a valve for controlling the opening and closing of the gas supply hole.

8. The filtration device according to claim 7, characterized in that It also includes a pipeline connecting the valve and the air supply hole.

9. The suction filtration device according to claim 7, characterized in that The valve is a solenoid valve.

10. The filtration device according to claim 7, characterized in that: It also includes an air filter arranged upstream of the air supply hole.

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