Filtering device for laboratory microbiological detection

Abstract

The invention relates to the technical field of microbiological detection, and particularly discloses a laboratory microbiological detection filter device which comprises a collecting pipe, a vacuum diaphragm pump and a supporting plate, the vacuum diaphragm pump is communicated with any end of the collecting pipe through a drainage assembly, and a plugging structure is arranged at the end, away from the vacuum diaphragm pump, of the collecting pipe. A supporting structure is arranged on the side wall of the collecting pipe, a plasma sterilization device is installed on the side wall of the collecting pipe through a supporting assembly, a plurality of branch pipes are arranged on the side wall of the collecting pipe, the top ends of the branch pipes are in threaded connection with filter heads, the filter heads are communicated with the collecting pipe through the branch pipes, and the top ends of the filter heads are sleeved with filter cups. And a filter membrane is arranged between the filter head and the filter cup. The filter device is provided with a leveling structure, the stability of the filter device in the using process is improved, the filter head can be automatically sterilized and purified, the detachable filter head is arranged, and membrane placing and membrane taking are convenient and fast.

Description

Technical Field

[0001] The invention relates to the technical field of microbial detection, and in particular to a filtering device for laboratory microbial detection. Background Art

[0002] The membrane filtration method is an internationally recognized standard method for microbial detection or particle contamination. It is a filtration system composed of a filtration device combined with an external oil-free diaphragm vacuum pump. When using this system, the filter membrane is placed on the filter head and fixed and sealed with a filter cup to form a complete filtration device. Based on the principle of membrane filtration, the sample solution is separated from the microorganisms, and the microorganisms are retained on the filter membrane. The filter membrane is transferred to the culture medium and placed in an incubator for culture, and then the colonies are counted and identified.

[0003] However, there are some drawbacks in the existing related technologies. For example, during the use of the filter device for membrane filtration, the membrane filtration bracket is generally supported by a simple plate frame, resulting in insufficient stability. Since the filter head generally needs to be sterilized manually with a handheld flame sterilization gun before placing the filter membrane, the bacteria in the tube are difficult to handle, resulting in insufficient sterilization effect, insufficient sterilization efficiency, and inconvenient use. Summary of the invention

[0004] In order to solve the above-mentioned problems existing in the prior art, the present invention provides a filtration device for laboratory microbial detection, which can have a leveling structure, improve the stability of the filtration device during use, have an automatic sterilization and purification function for the filter head, and have a detachable filter head, making it convenient and quick to place and remove the membrane.

[0005] The purpose of the present invention can be achieved through the following technical solutions:

[0006] A filtering device for laboratory microbial detection, comprising a manifold, a vacuum diaphragm pump and a support plate, wherein the vacuum diaphragm pump is connected to any end of the manifold through a drainage assembly, a plugging structure is provided at one end of the manifold away from the vacuum diaphragm pump, a supporting structure is provided on a side wall of the manifold, and a plasma sterilization device is installed on the side wall of the manifold through the supporting assembly;

[0007] The side wall of the manifold is provided with a plurality of branch pipes, the top end of the branch pipes is threadedly connected with a filter head, the filter head is connected with the manifold through the branch pipes, the top end of the filter head is sleeved with a filter cup, a filter membrane is arranged between the filter head and the filter cup, a notch matching the filter membrane is arranged at the top end of the filter head, the notch is located on the side of the filter head close to the plasma sterilization device, the filter head is threadedly connected with the branch pipes, so as to ensure that the filter head can be quickly and easily disassembled and installed, the unique detachable filter head is convenient for sterilizing the filter head and avoiding secondary contamination of the filter membrane, the filter membrane support pad on the filter head adopts alloy or stainless steel particle sintering process, the material has good corrosion resistance, ensures that microorganisms or particles are evenly distributed on the surface of the filter membrane, and the unique membrane taking notch makes it convenient and quick to place and take the membrane;

[0008] The plasma sterilization device comprises a support box, two square tubes are arranged at the bottom end of the support box, a fan for providing airflow power is arranged in the square tube, an inverted U-shaped channel is arranged in the support box, a tubular plasma generator is arranged on the bottom wall of the horizontal section of the U-shaped channel of the support box, a connected drainage tube is arranged at the top of the support box, a plurality of universal tubes are arranged on the side wall of the horizontal section of the drainage tube, the number of the universal tubes and the filter head are arranged in the same manner, an air nozzle is connected to the end of the universal tube away from the drainage tube, the two fans are operated to draw the airflow and enter the support box from the square tube, at the same time, the tubular plasma generator uses high-energy current to ionize gas molecules and accelerate them to a high speed, thereby generating plasma, the plasma gas flows through the drainage tube and the universal tube, and finally blows to the filter head from the air nozzle, the filter head is quickly sterilized, and cross contamination between different samples is avoided; then, after the filter membrane is placed at the center of the filter head, the plasma generator stops running, and then the sterile filter cup is taken and installed on the filter head.

[0009] Preferably, the drainage component includes a joint, the vacuum diaphragm pump is provided with an air inlet, and a hose is provided between the joint and the air inlet.

[0010] Preferably, the plugging structure comprises a sleeve plug, which is slidably sleeved on the end of the manifold, a plug post is provided on the side of the sleeve plug close to the manifold, and an end of the plug post located in the manifold is provided with an oblique angle.

[0011] Preferably, the supporting structure includes two support plates, which are sleeved on both ends of the manifold, and two support blocks are provided at the bottom end of the support plates. A U-shaped block is provided at the bottom end of the support block, and a stud foot pad is threadedly connected to the bottom end of the horizontal section of the U-shaped block, and a grip hole is provided on the side wall of the stud foot pad.

[0012] Preferably, the radial cross section of the support plate is T-shaped, and the axial cross section of the support plate is semicircular.

[0013] Preferably, a valve is provided on the side wall of the branch pipe, and the valve comprises a stainless steel valve body, an alloy handle and an angle switch.

[0014] Preferably, the drainage tube is arranged in a T-shape, the bottom end of the drainage tube is communicated with the support box, and both ends of the horizontal section of the drainage tube are closed.

[0015] Preferably, the support assembly includes a support plate, the square tube and the support plate are arranged to penetrate each other, the manifold is fixedly sleeved with two support rings, the side walls of the support rings are provided with support rings, and the bearing block is fixedly connected to the support plate.

[0016] The beneficial effects of the present invention are:

[0017] 1. By setting the support structure, the beneficial effect that can be obtained is that the vacuum diaphragm pump is connected to any end of the manifold through the drainage assembly, and a plugging structure is provided at one end of the manifold away from the vacuum diaphragm pump. The support structure includes two support plates, which are sleeved at both ends of the manifold. Two support blocks are provided at the bottom end of the support plate, and a U-shaped block is provided at the bottom end of the support block. The bottom end of the horizontal section of the U-shaped block is threadedly connected with a stud foot pad, and the side wall of the stud foot pad is provided with a grip hole;

[0018] Two support plates support and fix the manifold. According to the inclination angle of the table in the laboratory, the four stud foot pads are rotated and adjusted. The four stud foot pads are all in contact with the table. When the filter device needs to be moved, both hands hold the two support plates through the two grip holes to complete the movement. The filter device is easy to transfer and has a leveling structure, which improves the stability of the filter device during use.

[0019] 2. By setting up a plasma sterilization device, the beneficial effect that can be obtained is that two square tubes are arranged at the bottom end of the support box, a fan for providing airflow power is arranged in the square tube, an inverted U-shaped channel is arranged in the support box, a tubular plasma generator is arranged on the bottom wall of the horizontal section of the U-shaped channel of the support box, a connected drainage pipe is arranged on the top of the support box, a plurality of universal tubes are arranged on the side wall of the horizontal section of the drainage pipe, the number of the universal tubes and the filter head are arranged in the same manner, and an air nozzle is connected to the end of the universal tube away from the drainage pipe;

[0020] The two fans are running to draw the airflow from the square tube into the support box. At the same time, the tubular plasma generator uses high-energy current to ionize the gas molecules and accelerate them to a high speed, thereby generating plasma. The plasma gas flows through the drainage tube and the universal tube, and finally blows from the air nozzle to the filter head to quickly sterilize the filter head to avoid cross contamination between different samples. The vacuum diaphragm pump is running to draw the plasma air to purify and sterilize the manifold, branch pipes and filter head. It has the function of automatic sterilization and purification of the filter head, and is more convenient to use.

[0021] 3. By setting the filter head, the beneficial effect that can be obtained is that the side wall of the manifold is provided with a plurality of branch pipes, the top end of the branch pipe is threadedly connected with the filter head, the filter head is connected with the manifold through the branch pipe, the top end of the filter head is sleeved with a filter cup, a filter membrane is arranged between the filter head and the filter cup, and a notch matching the filter membrane is arranged at the top end of the filter head, and the notch is located on the side of the filter head close to the plasma sterilization device;

[0022] The filter head is threadedly connected to the branch pipe to ensure that the filter head can be quickly and easily removed and installed. The unique detachable filter head facilitates the sterilization of the filter head and avoids secondary contamination of the filter membrane. The filter membrane support pad on the filter head adopts alloy or stainless steel particle sintering process. The material has good corrosion resistance and ensures that microorganisms or particles are evenly distributed on the surface of the filter membrane. The unique membrane removal notch has a detachable filter head, which makes it convenient and quick to place and remove the membrane. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to facilitate understanding by those skilled in the art, the present invention is further described below with reference to the accompanying drawings.

[0024] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 This is a diagram showing the installation structure of the drainage tube assembly in the present invention;

[0026] Figure 3 This is an installation structure diagram of the plugging structure in the present invention;

[0027] Figure 4 This is a structural diagram of the support plate of the present invention;

[0028] Figure 5 This is a diagram of the installation structure of the filter head in the present invention;

[0029] Figure 6 It is an installation structure diagram of the plasma generating device in the present invention;

[0030] Figure 7 It is an installation structure diagram of the tubular plasma generator in the present invention;

[0031] Figure 8 The figure is a structural diagram of the universal tube and the air nozzle of the present invention;

[0032] Fig. 9 This is a diagram of the installation structure of the support assembly in the present invention.

[0033] Description of reference numerals:

[0034] In the figure: 1. manifold; 11. joint; 12. sleeve plug; 13. plug; 14. branch pipe; 15. filter head; 16. filter cup; 17. valve; 18. filter membrane; 19. notch; 2. vacuum diaphragm pump; 21. air inlet; 22. hose; 3. support plate; 31. support block; 32. U-shaped block; 33. stud foot pad; 34. grip hole; 41. support box; 42. square tube; 43. fan; 44. tubular plasma generator; 45. drainage tube; 46. universal tube; 47. air nozzle; 51. support plate; 52. support ring; 53. bearing block. DETAILED DESCRIPTION

[0035] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the specific implementation methods, structures, features and effects of the present invention are clearly and completely described below in combination with the accompanying drawings and preferred embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] In the description of the present application, it should be understood that the orientation or position relationship indicated by "inside", "outside", etc. is based on the orientation or position described in the drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, a specific orientation structure and operation, and therefore cannot be understood as a limitation on the present application.

[0037] Reference Figure 1-Figure 9, which is a filtering device for laboratory microbial detection disclosed by the present invention, comprising a manifold 1, a vacuum diaphragm pump 2 and a support plate 3, the vacuum diaphragm pump 2 is connected to any end of the manifold 1 through a drainage component, the drainage component comprises a joint 11, an air inlet 21 is provided on the vacuum diaphragm pump 2, a hose 22 is provided between the joint 11 and the air inlet 21, a plugging structure is provided at one end of the manifold 1 away from the vacuum diaphragm pump 2, the plugging structure comprises a sleeve plug 12, the sleeve plug 12 is slidably sleeved on the end of the manifold 1, a plug column 13 is provided on the side of the sleeve plug 12 close to the manifold 1, an end of the plug column 13 located in the manifold 1 is provided with an oblique angle, a plurality of branch pipes 14 are provided on the side wall of the manifold 1, a filter head 15 is threadedly connected to the top of the branch pipe 14, and the filter head 15 is connected to the manifold 1 through the branch pipe 14 A filter cup 16 is provided on the top of the filter head 15, and a valve 17 is provided on the side wall of the branch pipe 14. The valve 17 includes a stainless steel valve body, an alloy handle and an angle switch. A filter membrane 18 is provided between the filter head 15 and the filter cup 16. A notch 19 matching the filter membrane 18 is provided on the top of the filter head 15. The notch 19 is located on the side of the filter head 15 close to the plasma sterilization device. The filter head 15 is threadedly connected to the branch pipe 14 to ensure that the filter head 15 can be quickly and easily disassembled and installed. The unique detachable filter head 15 facilitates the sterilization of the filter head 15 and avoids secondary contamination of the filter membrane 18. The filter membrane 18 support pad on the filter head 15 adopts an alloy or stainless steel particle sintering process. The material has good corrosion resistance, which ensures that microorganisms or particles are evenly distributed on the surface of the filter membrane 18. The unique membrane removal notch 19 makes it convenient and quick to place and remove the membrane.

[0038] A supporting structure is provided on the side wall of the manifold 1, and the supporting structure includes two support plates 3, which are sleeved on both ends of the manifold 1, the radial cross-section of the support plate 3 is T-shaped, and the axial cross-section of the support plate 3 is semicircular. Two support blocks 31 are provided at the bottom end of the support block 31, and a U-shaped block 32 is provided at the bottom end of the support block 31. The bottom end of the horizontal section of the U-shaped block 32 is threadedly connected with a stud foot pad 33, and the side wall of the stud foot pad 33 is provided with a grip hole 34. The two support plates 3 support and fix the manifold 1. According to the inclination angle of the desktop in the laboratory, the four stud foot pads 33 are rotated to adjust, and the four stud foot pads 33 are all in contact with the desktop. When the filter device needs to be moved, both hands hold the two support plates 3 through the two grip holes 34 to complete the movement. The filter device is easy to transfer and has a leveling structure, which improves the stability of the filter device during use.

[0039] A plasma sterilization device is installed on the side wall of the manifold 1 through a support assembly. The plasma sterilization device includes a support box 41. Two square tubes 42 are arranged at the bottom end of the support box 41. A fan 43 for providing airflow power is arranged in the square tube 42. An inverted U-shaped channel is arranged in the support box 41. A tubular plasma generator 44 is arranged on the bottom wall of the horizontal section of the U-shaped channel of the support box 41. A connected drainage pipe 45 is arranged at the top of the support box 41. The drainage pipe 45 is T-shaped. The bottom end of the drainage pipe 45 is connected to the support box 41. Both ends of the horizontal section of the drainage pipe 45 are closed. A plurality of universal tubes 46 are arranged on the side wall of the horizontal section of the drainage pipe 45. The number of universal tubes 46 and the filter head 15 are the same. The end of the universal tube 46 away from the drainage pipe 45 is connected with an air nozzle 47. The support assembly includes a support plate 51, a square tube 42 and the support plate 51 are arranged through, the manifold 1 is fixedly sleeved with two support rings 52, the side walls of the support rings 52 are provided with support rings 52, the bearing block 53 is fixedly connected to the support plate 51, and the two fans 43 are operated to draw the airflow from the square tube 42 into the support box 41. At the same time, the tubular plasma generator 44 uses high-energy current to ionize and accelerate the gas molecules to a high speed, thereby generating plasma. The plasma gas flows through the drainage tube 45 and the universal tube 46, and finally blows from the air nozzle 47 to the filter head 15, which quickly sterilizes the filter head 15 to avoid cross contamination between different samples. The vacuum diaphragm pump 2 is operated to draw the plasma air to purify and sterilize the manifold 1, the branch pipe 14 and the filter head 15; then the filter membrane 18 is placed at the center of the filter head 15, and the plasma generating device stops running.

[0040] The working principle and use process of the present invention are as follows: first, the filter head 15 is sterilized, and two fans 43 are operated to pump the airflow from the square tube 42 into the support box 41. At the same time, the tubular plasma generator 44 uses high-energy current to ionize the gas molecules and accelerate them to a high speed, thereby generating plasma. The plasma gas flows through the drainage tube 45 and the universal tube 46, and finally blows from the air nozzle 47 to the filter head 15, so as to quickly sterilize the filter head 15 and avoid cross contamination between different samples; then, the filter membrane 18 is placed at the center of the filter head 15, and the plasma generating device is stopped, and then the sterile filter cup 16 is taken and installed on the filter head 15; then, the liquid sample is poured into the filter cup 16, and the vacuum diaphragm pump 2 is operated, and the liquid sample is passed through the filter cup 16 in cooperation with the connector 11, the hose 22 and the air inlet 21. The filter membrane 18 and the filter head 15 are drawn into the branch pipe 14, and the filter head 15 is threadedly connected to the branch pipe 14 to ensure that the filter head 15 can be quickly and easily disassembled and installed. The unique detachable filter head 15 is convenient for sterilizing the filter head 15 and avoiding secondary contamination of the filter membrane 18. The filter membrane 18 support pad on the filter head 15 adopts an alloy or stainless steel particle sintering process, and the material has good corrosion resistance, ensuring that microorganisms or particles are evenly distributed on the surface of the filter membrane 18. The unique membrane removal notch 19 makes it convenient and quick to place and remove the membrane. The corresponding valve 17 is opened for filtering, and the airflow carries the filtrate from the manifold 1 into the vacuum diaphragm pump 2 and is discharged; after the sample filtration is completed, the filter cup 16 is removed from the filter head 15, and the filter membrane 18 is lifted from the notch 19 of the filter head 15 with special tweezers, and then the filter membrane 18 is flattened on the culture medium for microbial culture.

[0041] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A filtration device for laboratory microbial detection, characterized in that: The invention comprises a manifold (1), a vacuum diaphragm pump (2) and a support plate (3); the vacuum diaphragm pump (2) is connected to any end of the manifold (1) via a drainage assembly; an end of the manifold (1) away from the vacuum diaphragm pump (2) is provided with a plugging structure; a side wall of the manifold (1) is provided with a supporting structure; and a plasma sterilization device is installed on the side wall of the manifold (1) via a supporting assembly; The side wall of the manifold (1) is provided with a plurality of branch pipes (14), the top ends of the branch pipes (14) are threadedly connected with filter heads (15), the filter heads (15) are connected with the manifold (1) through the branch pipes (14), the top ends of the filter heads (15) are sleeved with filter cups (16), a filter membrane (18) is provided between the filter heads (15) and the filter cups (16), the top ends of the filter heads (15) are provided with notches (19) matching the filter membrane (18), and the notches (19) are located on a side of the filter heads (15) close to the plasma sterilization device; The plasma sterilization device comprises a support box (41), two square tubes (42) are arranged at the bottom end of the support box (41), a fan (43) for providing airflow power is arranged in the square tube (42), an inverted U-shaped channel is arranged in the support box (41), a tubular plasma generator (44) is arranged on the bottom wall of the horizontal section of the U-shaped channel of the support box (41), a connected drainage pipe (45) is arranged at the top end of the support box (41), a plurality of universal tubes (46) are arranged on the side wall of the horizontal section of the drainage pipe (45), the number of the universal tubes (46) and the number of the filter head (15) are the same, and an air nozzle (47) is connected to one end of the universal tube (46) away from the drainage pipe (45).

2. A filtration device for laboratory microbial detection according to claim 1, characterized in that: The drainage assembly comprises a joint (11), an air inlet (21) is provided on the vacuum diaphragm pump (2), and a hose (22) is provided between the joint (11) and the air inlet (21).

3. A filtration device for laboratory microbial detection according to claim 1, characterized in that: The plugging structure comprises a sleeve plug (12), the sleeve plug (12) being slidably sleeved on the end of the manifold (1), a plug post (13) being provided on a side of the sleeve plug (12) close to the manifold (1), and an end of the plug post (13) located inside the manifold (1) being provided with an oblique angle.

4. A filtration device for laboratory microbial detection according to claim 1, characterized in that: The support structure comprises two support plates (3), the support plates (3) are sleeved on the two ends of the manifold (1), two support blocks (31) are arranged at the bottom end of the support plates (3), a U-shaped block (32) is arranged at the bottom end of the support block (31), a stud foot pad (33) is threadedly connected to the bottom end of the horizontal section of the U-shaped block (32), and a grip hole (34) is arranged on the side wall of the stud foot pad (33).

5. A filtration device for laboratory microbial detection according to claim 4, characterized in that: The radial cross section of the support plate (3) is T-shaped, and the axial cross section of the support plate (3) is semicircular.

6. A filtration device for laboratory microbial detection according to claim 1, characterized in that: The side wall of the branch pipe (14) is provided with a valve (17), and the valve (17) comprises a stainless steel valve body, an alloy handle and an angle switch.

7. A filtration device for laboratory microbial detection according to claim 1, characterized in that: The drainage tube (45) is arranged in a T-shape, the bottom end of the drainage tube (45) is communicated with the support box (41), and both ends of the horizontal section of the drainage tube (45) are closed.

8. A filtration device for laboratory microbial detection according to claim 1, characterized in that: The support assembly comprises a support plate (51), the square tube (42) and the support plate (51) are arranged to penetrate each other, the manifold (1) is fixedly sleeved with two support rings (52), the side walls of the support rings (52) are provided with support rings (52), and the bearing block (53) is fixedly connected to the support plate (51).

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