Sterile bag for microbiological detection elution
By incorporating zippered closures, connecting straps, and wire seals into the sterile bags, the problems of sample contamination and breakage within the bags are solved, ensuring thorough mixing of the sample and eluent and improving the accuracy and safety of the detection.
Patent Information
- Application Number
- CN202520051398.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-09
- Publication Date
- 2026-03-03
- Estimated Expiration
- 2035-01-09
AI Technical Summary
In existing microbial testing processes, samples are easily contaminated by contact with the bag opening while in a sterile bag. During shaking, samples may break or float, leading to deviations in test results. This process is inconvenient and unsafe.
Design a sterile bag for microbial testing. The bag body is divided into upper and lower elution zones by a zipper seal and connecting strap. It is equipped with a metal wire seal and pre-tear line structure. The connecting tube and valve control the liquid flow to prevent the sample from scratching the bag body and floating, and to ensure thorough mixing.
It improves the convenience and safety of operation, ensures the accuracy and reliability of microbial detection, avoids human operation contamination and mechanical damage, and achieves thorough mixing of sample and eluent.
Smart Images
Figure CN223963480U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a sterile bag for elution in microbial detection, belonging to the field of microbial detection and testing technology. Background Technology
[0002] Microbial limit testing for non-sterile products typically includes microbial counting and control microorganism testing. This usually involves sufficient contact and agitation elution of the product with the eluent to transfer microorganisms from the product to the eluent. Microorganisms in the eluent are then enriched onto the filter membrane through membrane filtration, followed by colony formation through culture and further identification to achieve microbial counting and detection of control microorganisms. Therefore, the key to efficient, accurate, and reliable testing lies in how to conveniently and efficiently transfer microorganisms from the product to the eluent while effectively minimizing the risk of human contamination during this process.
[0003] Aseptic elution bags, typically made of polyethylene, offer advantages such as sterility, non-toxicity, and chemical stability, making them widely used in food, environmental, and medical device testing. Currently, commercially available aseptic elution bags mostly consist of a sterile bag body with a pre-tear line and sealing wire at the top, resulting in a simple structure. During microbiological testing, samples are placed through the bag opening. Due to the complexity of the samples—varies in shape, mass, volume, and hardness—they are highly susceptible to contamination upon contact with the bag's cross-section or outer surface as they pass through the opening. After the sample is transferred into the aseptic bag, eluent is added for elution by agitation. During this elution process, if the sample is too heavy or has a sharp surface, its movement can cause the aseptic bag to break mechanically. If the sample density is low, it may float on the eluent, leading to insufficient elution and thus inaccurate test results.
[0004] To address the aforementioned difficulties, this invention provides a convenient and efficient elution sterile bag for microbial detection. Summary of the Invention
[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a sterile bag for elution in microbial detection. This bag is used to fully mix the sample to be tested with the eluent in microbial experiments. It can prevent the sample from scratching the sterile bag during the mixing process and prevent the sample from failing to mix due to floating. The operation is convenient, reliable and safe.
[0006] To achieve the above objectives, this utility model employs the following technical solution:
[0007] This utility model provides a sterile bag for microbial detection elution, including a bag body with an opening at the top. A sealing mechanism for sealing the bag body is provided at the opening. Connecting straps that can fit together are provided on both sides of the middle part of the bag body. The connecting straps are used to divide the interior of the bag body into upper and lower elution areas. When the connecting straps connect the middle part of the bag body, they can connect the upper elution area and the lower elution area.
[0008] Specifically, the connecting strap has a zipper-type closure, and the length of the zipper-type closure is shorter than the width between the cavities of the bag body.
[0009] Specifically, the number of zipper-type seals shall not be less than two.
[0010] Specifically, a first pull ring is provided on both sides of the bag body at the zipper-type closure position.
[0011] Specifically, the sealing mechanism is a metal wire.
[0012] Specifically, the metal wires are distributed on both sides of the bag and are respectively fixed to the surface at the opening of the bag.
[0013] Specifically, a second pull ring is provided on both sides of the bag body at the position of the metal wire.
[0014] Specifically, the bag opening is provided with an extension section, which is provided with a first transverse pre-tear line and a second longitudinal pre-tear line located on both sides of the bag. The two second pre-tear lines are both located from the first pre-tear line and extend towards the area where the inner cavity of the bag is located.
[0015] Specifically, a third pull ring is provided on both sides of the bag body at the position of the first pre-tear line.
[0016] Specifically, the bag body is provided with a connecting pipe that communicates with the inner cavity of the bag body, the connecting pipe is provided with a valve, and the connecting pipe is provided with a protective cap for sealing the opening of the connecting pipe.
[0017] Compared with the prior art, the beneficial effects achieved by this utility model are as follows:
[0018] 1. This utility model, by setting a connecting strap in the bag body, divides the internal space of the bag into two relatively separable spaces. When the sample to be tested is placed in one of the spaces, the sample cannot move significantly within the sterile bag space, while the eluent can be exchanged normally between the two spaces to achieve the washing effect. Therefore, it can effectively avoid scratches on the surface of the sterile bag and the problem that the light weight of the eluent cannot mix well with the eluent. The operation is simpler and the elution efficiency is better, which has good application prospects.
[0019] 2. This utility model, by setting avoidance structures in all parts of the aseptic bag operation, prevents external dirt from mixing into the inside of the aseptic bag during the experiment, thereby ensuring the accuracy of the experiment and good operability. Attached Figure Description
[0020] Figure 1 This is a schematic diagram of the overall structure of the sterile bag for washing and elution provided in this embodiment of the utility model;
[0021] Figure 2 This is a utility model Figure 1 Enlarged view of section A of the sterile bag for elution provided in the embodiment;
[0022] Figure 3 This is a partial explosion diagram of the sterile bag for elution provided in this embodiment of the utility model;
[0023] Reference numerals: 1. Bag body; 2. Connecting strap; 3. First pull ring; 4. Metal wire; 5. First pre-tear line; 6. Second pre-tear line; 7. Connecting pipe; 8. Valve; 9. Protective cap; 10. Second pull ring; 11. Third pull ring. Detailed Implementation
[0024] The present invention will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and should not be used to limit the scope of protection of the present invention.
[0025] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.
[0026] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Example:
[0027] This utility model provides a sterile bag for elution in microbial testing, used to fully mix the sample to be tested with the eluent in microbial experiments. It avoids scratching the sterile bag by the sample during mixing and prevents incomplete mixing due to sample floating. The operation is convenient, reliable, and safe. To achieve the structural function of the sterile bag, it is designed to include a bag body 1. Specifically, the top of the bag body 1 is set as an opening. To prevent the eluent from splashing out during mixing and agitation, a sealing mechanism is provided at the opening of the bag body 1 to seal it. The specific sealing method is described later. To prevent damage to the bag body 1 from the eluting material, connecting straps 2 are provided on both sides of the middle part of the bag body 1, which can fit together. The connecting straps 2 are used to divide the interior of the bag body 1 into upper and lower elution areas. However, to ensure sufficient mixing of the eluent, the connecting straps 2 are designed to connect the upper and lower elution areas when connecting the middle area of the bag body 1. When elution testing of the sample is required, first open bag 1 and the area connected by connecting strap 2. Place the sample to be tested in one of the areas and then close connecting strap 2 to confine the sample to one elution area. Then, add the eluent and elute, and shake thoroughly to allow the eluent to exchange between the two elution areas and achieve full contact with the sample. This method avoids the sample being too light and difficult to mix completely with the eluent, and also prevents the bag 1 from being damaged due to excessive sample movement or sharpness. It achieves effective mixing, high safety, and convenient operation, and has good application prospects.
[0028] This utility model provides a sterile bag for microbial detection elution. To facilitate the isolation of two elution zones, the connecting strap 2 is designed with a zipper closure, and the length of the zipper closure is less than the width between the cavities of the bag body 1. This design primarily prevents the connecting strap 2 from penetrating the inner cavity of the bag body 1, thus preventing liquid mixing between the two elution zones when the connecting strap 2 is closed. Specific design details can be found in [reference needed]. Figure 1As shown, in a preferred embodiment, at least two zipper-type seals can be provided to retain more gaps for the eluent to mix and to provide sufficient resistance to prevent the analyte from escaping to other areas.
[0029] This utility model provides a sterile bag for microbial detection elution. Considering that the surface of the bag body 1 is usually a smooth surface, it may be difficult to pull open the closed connecting strip 2. In order to facilitate operation, a first pull ring 3 can be provided on both sides of the bag body 1 at the position of the zipper seal, so as to facilitate manual operation, etc.
[0030] This utility model provides a sterile bag for microbial detection elution, specifically offering a sealing mechanism to prevent leakage of the eluent. For details, please refer to... Figure 1 As shown, the sealing mechanism is a metal wire 4. During operation, the metal wire 4 is wound continuously from the opening, using a multi-layered winding method to achieve a proper seal at the opening, avoiding poor sealing that could lead to unexpected situations during the test. Preferably, the metal wire 4 can be directly distributed on both sides of the bag body 1 and fixed to the surface of the opening of the bag body 1, which facilitates direct manual operation.
[0031] This utility model provides a sterile bag for microbial detection elution. In order to overcome the deformation at the position of the metal wire 4 and pull open the bag body 1 to introduce the eluent, a second pull ring 10 can be provided on both sides of the bag body 1 at the position of the metal wire 4, so as to facilitate manual pulling operation.
[0032] This utility model provides a sterile bag for microbial detection elution. To prevent contamination from dirt, bacteria, and impurities at the edge of the bag opening from entering during the pouring of the eluent, an extension section can be provided at the opening of the bag body 1. Figure 1 As shown, the extension section has a first transverse pre-tear line 5 and two second longitudinal pre-tear lines 6 located on both sides of the bag body 1. Both second pre-tear lines 6 originate from the first pre-tear line 5 and extend towards the area containing the inner cavity of the bag body 1. This mechanism ensures the sealing of the inner cavity of the extension section before the test operation, allowing it to be torn open when the test is required. The exposed inner surface comes into contact with the eluent, preventing the introduction of external impurities into the eluent and ensuring operational accuracy. Specifically, during operation, the first pre-tear line 5 is torn open first, followed by the second pre-tear line 6. To facilitate opening the portion of the inner cavity covered by the second pre-tear line 6, a third pull ring 11 is preferably provided on both sides of the bag body 1 at the location of the first pre-tear line 5 for manual support during the opening operation.
[0033] This invention provides a sterile bag for microbial detection elution. To prevent the introduction of external impurities and bacteria during reverse pouring of the eluent, a connecting tube 7, communicating with the inner cavity of the bag body 1, is provided on the bag body 1. A valve 8 is provided on the connecting tube 7 to control the flow of liquid, and a protective cap 9 is provided on the connecting tube 7 to seal its opening. When not in use, the protective cap 9 is closed to prevent bacteria from entering the interior of the connecting tube 7. After mixing and elution are completed, the protective cap 9 is opened, allowing the eluent to flow out from the connecting tube 7. This significantly reduces contact with the external environment throughout the process, which helps ensure the accuracy of the experiment.
[0034] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.
Claims
1. A sterile bag for elution in microbial detection, characterized in that, Includes a bag body (1), the top of the bag body (1) is provided with an opening, the opening of the bag body (1) is provided with a sealing mechanism for sealing the bag body (1), the two sides of the middle part of the bag body (1) are provided with connecting straps (2) that can fit together, the connecting straps (2) are used to divide the interior of the bag body (1) into upper and lower washing areas, and the connecting straps (2) can connect the upper washing area and the lower washing area when connecting the middle area of the bag body (1).
2. The sterile bag for microbial detection elution according to claim 1, characterized in that, The connecting strip (2) is a zipper-type seal, and the length of the zipper-type seal is lower than the width between the cavities of the bag body (1).
3. The sterile bag for microbial detection elution according to claim 2, characterized in that, The number of zipper-type seals shall not be less than two.
4. The sterile bag for microbial detection elution according to claim 2, characterized in that, The bag body (1) is provided with a first pull ring (3) on both sides and at the position of the zipper closure.
5. The sterile bag for microbial detection elution according to claim 1, characterized in that, The sealing mechanism is a metal wire (4).
6. The sterile bag for microbial detection elution according to claim 5, characterized in that, The metal wires (4) are distributed on both sides of the bag body (1) and are respectively fixed on the surface of the opening position of the bag body (1).
7. The sterile bag for microbial detection elution according to claim 6, characterized in that, A second pull ring (10) is provided on both sides of the bag body (1) at the position of the metal wire (4).
8. The sterile bag for microbial detection elution according to claim 1, characterized in that, The bag body (1) has an extension section at the opening position. The extension section has a first pre-tear line (5) in the horizontal direction and a second pre-tear line (6) in the vertical direction on both sides of the bag body (1). The two second pre-tear lines (6) are both located at the first pre-tear line (5) and extend towards the area where the inner cavity of the bag body (1) is located.
9. A sterile bag for microbial detection elution according to claim 8, characterized in that, The bag body (1) is provided with a third pull ring (11) on both sides and at the position of the first pre-tear line (5).
10. A sterile bag for microbial detection elution according to claim 1, characterized in that, The bag body (1) is provided with a connecting pipe (7) that communicates with the inner cavity of the bag body (1), the connecting pipe (7) is provided with a valve (8), and the connecting pipe (7) is provided with a protective cap (9) for sealing the opening of the connecting pipe (7).