CN219470040U - A kind of microbial limit testing device filter membrane taking frame - Google Patents

Abstract

The utility model relates to a filter membrane taking frame for a microorganism limit testing device. At present, when the filter membrane is picked up by tweezers, the tip of the tweezers often punctures the filter membrane, resulting in deviations in the number of bacteria, molds, and yeasts in the microbiological inspection items. A filter membrane taking frame of a microbial limit testing device, which consists of: a test pump box (1) and a filter head (2), a filter head is installed on the top of the test pump box, and a film taking frame is installed on the top of the filter head (3), the film taking frame is composed of a support frame (3-1) and a filter plate (3-2), and the inner ring wall of the support frame is integrally connected with the filter plate; the annular surface of the support frame is provided with a gap structure A (3 ‑3), the frame of the filter plate is provided with a rectangular notch structure B (3‑4), the width of the notch structure A and the notch structure B are the same, and the notch structure A and the notch structure B are in the same direction. The utility model is applied in the field of microorganism detection.

Description

A kind of microbial limit testing device filter membrane taking frame

technical field

The utility model relates to the field of microorganism detection, in particular to a filter membrane taking frame for a microorganism limit inspection device.

Background technique

The microbial limit test device mainly traps the microorganisms in the test product on the filter membrane, takes out the filter membrane with a membrane remover, transfers it to the prepared solid medium, puts the bacteria side up, lays it flat, and covers it to form a closed culture medium. box, placed in a corresponding constant temperature incubator for cultivation and counting. When carrying out the microbial limit test, first install the filter head, fix the filter head above the instrument tube by screwing it tightly, sterilize the filter head with a flame spray gun, take out the filter membrane, and stick the filter membrane to the filter head with tweezers Above, put the bottom of the filter cup on the filter head, take out the test solution, sterilize the mouth of the test solution bottle, pour the sterilized test solution into the filter cup, turn on the power switch, click the setting interface, you can set Filtration required time, enter the running page, start the suction filtration button, the machine will automatically stop suction filtration when the set running time is reached, remove the filter cup, take out the filter membrane with tweezers, place the filter membrane on the petri dish, and do a good job Mark and invert the Petri dish. When removing the filter membrane from the filter head in the above operation, clamp the edge of the filter membrane with tweezers and remove it. Since the filter membrane is wetted after contacting the test solution, the gap between the filter membrane and the top annular surface of the filter head will Therefore, when the filter membrane is clamped by tweezers, it is necessary to insert the tweezers to the bottom of the filter membrane several times before the filter membrane can be clamped. During this process, the tip of the tweezers often punctures the filter membrane, causing The number of bacteria, mold, and yeast in the microbiological inspection items deviates.

Utility model content

The purpose of the utility model is to provide a filter membrane taking frame for a microbial limit testing device.

Above-mentioned purpose realizes by following technical scheme:

A filter membrane taking frame for a microbial limit testing device, which consists of: a test pump box and a filter head, a filter head is installed on the top of the test pump box, and a film taking frame is installed on the top of the filter head , the membrane taking frame is composed of a support frame and a filter plate, the inner ring wall of the support frame is integrally connected with the filter plate, and the filter plate is installed near the top third of the support frame;

A notch structure A is opened on the annular surface of the support frame, a notch structure B of a rectangular structure is opened on the frame of the filter plate, and the width of the notch structure A is the same as that of the notch structure B, And the notch structure A and the notch structure B are in the same direction.

In the filter membrane taking frame of the microorganism limit testing device, the diameter of the support frame is the same as that of the filter head housing.

In the filter membrane taking frame of the microbial limit testing device, a group of liquid leakage holes are opened on the plate surface of the filter plate.

In the filter membrane taking frame of the microbial limit testing device, a filter membrane is placed on the top of the filter plate.

The beneficial effects achieved by the utility model are:

1. The utility model does not need to insert the tweezers into the bottom of the filter membrane when the filter membrane is clamped by the tweezers, as long as the tweezers pass through the gap structure A of the support frame where the filter membrane is taken out and then inserted into the filter plate At the gap structure B on the top, the filter membrane can be directly removed from the filter head without damage or puncture of the filter membrane, ensuring the integrity of the filter membrane and avoiding the number of bacteria, mold, and bacteria in the microbial inspection items. Variations in the number of yeast cells, etc.

2. When the utility model is performing the microbial limit test, the filter membrane taking frame is placed on the top of the filter head, the filter membrane is placed above the filter membrane taking frame, and the bottom of the filter cup is fastened on the filter head. Pour the test solution into the filter cup, the test solution flows into the filter head from the leakage hole on the filter plate through the filter membrane, and is discharged from the drain pipe of the microbial limit test device. After the filter cup is removed, put The tweezers are first inserted into the notch structure A of the support frame of the filter membrane taking frame, insert the tweezers into the notch structure B on the filter plate, and then remove the filter membrane from the filter plate.

Description of drawings

The accompanying drawings are used to provide a further understanding of the utility model, and constitute a part of the description, and are used to explain the utility model together with the embodiments of the utility model, and do not constitute a limitation to the utility model. In the attached picture:

Accompanying drawing 1 is the structural representation of the utility model;

Accompanying drawing 2 is the top view of accompanying drawing 1;

Accompanying drawing 3 is A-A sectional view of accompanying drawing 2;

Accompanying drawing 4 is the installation structure schematic diagram of accompanying drawing 1;

Accompanying drawing 5 is the partial enlarged view of accompanying drawing 4;

In the figure: 1. Inspection pump box, 2. Filter head, 3. Membrane taking frame, 4. Filter membrane, 5. Filter cup, 6. Drain pipe, 3-1. Support frame, 3-2. Filter plate , 3-3, gap structure A, 3-4, gap structure B, 3-5, leakage hole.

Detailed ways

The preferred embodiments of the present utility model are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described here are only used to illustrate and explain the present utility model, and are not intended to limit the present utility model.

Example 1:

A filter membrane taking frame for a microbial limit testing device, which consists of: a test pump box 1 and a filter head 2, a filter head is installed on the top of the test pump box, and a filter head is installed on the top of the filter head Membrane frame 3, the described membrane taking frame is composed of a support frame 3-1 and a filter plate 3-2, the inner ring wall of the support frame is integrally connected with the filter plate, and the filter plate is installed on the support frame close to At the top third position; the membrane taking frame is placed on the top of the filter head, wherein the outer ring surface of the filter plate is integrally fixedly connected with the inner ring surface of the support frame; the diameter of the filter plate is slightly larger than the diameter of the filter membrane , so that the filter membrane can be placed above the filter plate;

A notch structure A3-3 is opened on the annular surface of the support frame, a notch structure B3-4 with a rectangular structure is opened on the frame of the filter plate, the notch structure A and the notch structure B The same width, and the same direction of the notch structure A and notch structure B.

The notch structure A on the support frame is an open structure, and the notch structure A runs through the body of the support frame longitudinally;

When the filter membrane is placed on the filter plate, the filter membrane covering the gap structure B is in an empty state. When clamping the filter membrane, the tweezers can be inserted into the gap structure A at the support first, and then inserted into the gap structure In B, the edge of the filter membrane is now between the two splints of the tweezers.

In the filter membrane taking frame of the microorganism limit testing device, the diameter of the support frame is the same as that of the filter head housing. The filter membrane frame is made of stainless steel as a whole.

Example 2:

In the filter membrane taking frame of the microbial limit testing device, a group of leakage holes 3-5 are opened on the plate surface of the filter plate.

A group of leakage holes are evenly opened on the plate surface of the filter plate, and a filter membrane 4 is placed on the top of the filter plate, and when the test solution passes through the filter membrane, it enters the filter head from the leakage holes on the filter plate; The filter plate supports the filter membrane to prevent the test solution from impacting the filter membrane when the test solution is poured in, thereby avoiding deformation of the filter membrane. In the microbial limit test, first install the filter head, fix the filter head above the instrument tube by tightening, sterilize the filter head with a flame spray gun, take out the filter membrane, and stick the filter membrane on the top of the filter head with tweezers , put the bottom of the filter cup on the filter head, take out the test solution, sterilize the mouth of the test solution bottle, pour the sterilized test solution into the filter cup, turn on the power switch, click the setting interface, you can set the filter The required time, enter the operation page, start the suction filtration button, the machine will automatically stop the suction filtration when the set running time is reached, remove the filter cup, take out the filter membrane with tweezers, place the filter membrane on the petri dish, and mark it , turn the Petri dish upside down. When removing the filter membrane from the filter head in the above operation, clamp the edge of the filter membrane with tweezers and remove it. Since the filter membrane is wetted after contacting the test solution, the gap between the filter membrane and the top annular surface of the filter head will It has adsorption force. Therefore, when the filter membrane is clamped by tweezers, it is necessary to insert the tweezers to the bottom of the filter membrane several times before the filter membrane can be clamped. During this process, the tip of the tweezers often punctures the filter membrane. The number of bacteria, molds, and yeasts in the microbiological inspection items may deviate.

Example 3:

When performing microbial limit testing, first install the filter head, fix the filter head above the instrument tube by screwing it tightly, then place the filter membrane taking frame above the filter head, and use a flame spray gun to clean the filter head and filter membrane. Take the membrane rack for sterilization, take out the filter membrane, place the filter membrane on the filter plate on the filter membrane rack with tweezers, then put the bottom of the filter cup on the filter head, take out the test solution, put the Disinfect the mouth of the test solution bottle, pour the sterilized test solution into the filter cup, turn on the power switch, click the setting interface, you can set the time required for filtration, enter the operation page, start the suction filter button, and wait until the set running time is reached The machine will automatically stop the suction filtration, remove the filter cup, pass the two splints of the tweezers through the gap structure A of the support frame, and then extend the two splints of the tweezers into the gap structure B of the filter plate, at this time the tweezers The two splints are between the filter membrane, and then clamp the splints of the two tweezers so that the tip of the tweezers clamps the edge of the filter membrane, thereby removing the filter membrane from the filter head.

Claims (4)

1. a kind of microbiological limit inspection device filter membrane takes the film frame, and its composition comprises: test pump case and filter head, the top of described test pump case is equipped with filter head, it is characterized in that: described filter head A film taking frame is installed on the top, and the film taking frame is composed of a support frame and a filter plate. The inner ring wall of the support frame is integrally connected with the filter plate, and the filter plate is installed on the support frame near the top three points. at one of the locations; A notch structure A is opened on the annular surface of the support frame, a notch structure B of a rectangular structure is opened on the frame of the filter plate, and the width of the notch structure A is the same as that of the notch structure B, And the notch structure A and the notch structure B are in the same direction. 2. The filter membrane taking frame of the microbial limit testing device according to claim 1, characterized in that: the diameter of the support frame is the same as that of the filter head housing. 3. The filter membrane taking frame of the microbial limit testing device according to claim 1, characterized in that: a group of liquid leakage holes are opened on the plate surface of the filter plate. 4. The filter membrane taking frame of the microbial limit testing device according to claim 3, characterized in that: a filter membrane is placed on the top of the filter plate.