Microbial limit detection filter

Abstract

The utility model discloses a microbial limit detection filter, and belongs to the technical field of filtering equipment. The utility model solves the problem that the waste liquid in the negative pressure channel easily flows back to the filter head to pollute the filter membrane at the filter head. The filter comprises a shell, at least one filter head is arranged on the shell, the filter head is connected with a suction mechanism, the suction mechanism comprises a negative pressure mechanism and a first pipeline communicated with the filter head, a first connector is arranged on the first pipeline and detachably connected with one end of a second pipeline, the negative pressure mechanism is connected with a third pipeline, and the third pipeline is connected with the negative pressure mechanism. The third pipeline is provided with at least one second connector, the other end of the second pipeline is detachably connected with the second connector, the first pipeline is provided with a check valve, and the negative pressure mechanism is connected with the liquid discharging pipe. According to the utility model, the negative pressure channel is arranged in a sectional type, and the check valve is arranged on the first pipeline, so that the probability that the filter membrane is polluted by waste liquid is reduced.

Description

Technical Field

[0001] This utility model belongs to the field of filtration equipment technology, specifically relating to a microbial limit detection filter. Background Technology

[0002] Microbial limit testing, a crucial method for assessing the degree of microbial contamination in non-sterilized preparations and their raw materials and excipients, is widely used in pharmaceuticals, food, and cosmetics. In pharmaceutical production, it ensures that the microbial content of various preparations meets safety standards, effectively preventing patients from suffering infections or adverse reactions due to excessive microbial levels. In the food industry, microbial limit testing allows for strict control of harmful microorganisms (such as Escherichia coli and Staphylococcus aureus), thereby ensuring food safety and reducing the risk of foodborne illnesses. In the cosmetics field, this testing aims to prevent product contamination by microorganisms, ensuring that consumers' skin health is not harmed. In conclusion, microbial limit testing is an important line of defense for ensuring the hygienic quality of various products and protecting consumer safety.

[0003] However, when the negative pressure is turned off after filtration, the residual negative pressure in the pipeline of the existing microbial limit test filter may cause the waste liquid in the negative pressure channel to flow back to the filter head, resulting in the filter membrane at the filter head being contaminated. Utility Model Content

[0004] To address the problem in existing technologies where residual negative pressure in the pipeline after filtration is completed may cause waste liquid in the negative pressure channel to flow back to the filter head, resulting in contamination of the filter membrane at the filter head, this invention provides a microbial limit detection filter.

[0005] The technical solution adopted in this utility model is as follows:

[0006] A microbial limit test filter includes a housing with at least one filter head. The filter head is connected to a suction mechanism, which includes a negative pressure mechanism and a first pipe communicating with the filter head. The first pipe has a first connector, which is detachably connected to one end of a second pipe. The negative pressure mechanism is connected to a third pipe, which has at least one second connector. The other end of the second pipe is detachably connected to the second connector. The first pipe has a check valve, and the negative pressure mechanism is connected to a drain pipe.

[0007] By adopting this technical solution, the negative pressure channel can be made into a detachable connection type, which can remove the middle second pipe for replacement or sterilization treatment, thus avoiding the long-term accumulation of pollutants in the waste liquid in the pipe, which would cause the pollutants to contaminate the filter membrane during the filtration process and reduce the probability of contamination. At the same time, a check valve is also installed on the first pipe to prevent liquid backflow and avoid waste liquid contamination of the filter membrane.

[0008] Preferably, the second pipe is a single-use structure.

[0009] With this technical solution, the second pipe is for single use only, and can be replaced after each use, reducing the probability of bacteria growing inside the pipe.

[0010] Preferably, the second pipe has a U-shaped structure.

[0011] With this technical solution, the second pipe has a U-shaped structure, which makes it easy to connect the two ends of the second pipe to the first connector and the second connector respectively.

[0012] Preferably, the housing is provided with a receiving groove, and the first pipe, the second pipe and the third pipe are all disposed in the receiving groove.

[0013] With this technical solution, the first, second, and third pipes are all placed inside the receiving tank, which improves the overall integrity of the device and makes it easier to use.

[0014] Preferably, the receiving groove is provided with a groove cover, the groove cover is provided with an observation window, and the observation window is provided with transparent glass.

[0015] After adopting this technical solution, the working status of the suction mechanism can be observed through the observation window, and the contamination of the first, second and third pipes by dust can also be reduced.

[0016] Preferably, one end of the slot cover is hinged to the housing, and the other end is detachably connected via a slot and a clip.

[0017] Preferably, the filter head is connected to the first pipe via a connecting pipe, and an adjustable electric valve is installed on the connecting pipe. The electric valve is electrically connected to a controller, and the controller is electrically connected to a control display screen installed on the housing.

[0018] After adopting this technical solution, the opening of the pipeline can be adjusted by electric valves, thereby adjusting the suction force to meet different filtration needs. The opening and closing of the negative pressure mechanism can be controlled by the control display screen.

[0019] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are:

[0020] This invention makes the negative pressure channel detachable, allowing the second pipe in the middle to be disassembled and replaced or sterilized, thus preventing pollutants in the waste liquid from accumulating in the pipe for a long time and causing them to contaminate the filter membrane during the filtration process, thereby reducing the probability of contamination. At the same time, a check valve is also installed on the first pipe to prevent liquid backflow, which can prevent waste liquid from contaminating the filter membrane. Attached Figure Description

[0021] This utility model will be described by way of example and with reference to the accompanying drawings, wherein:

[0022] Figure 1 This is a schematic diagram of the structure of this utility model;

[0023] Wherein: 1-shell, 2-second pipe, 3-third pipe, 4-second connector, 5-slot, 6-first connector, 7-first pipe, 8-drain pipe, 9-control display screen, 10-filter head, 11-slot head, 12-slot cover, 13-check valve. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0025] In the description of the embodiments of this application, it should be noted that the terms "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use. They are only for the convenience of describing this application 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. Therefore, they should not be construed as limitations on this application. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0026] The following is combined Figure 1 This utility model will be described in detail.

[0027] like Figure 1 As shown, a microbial limit test filter includes a housing 1 with three filter heads 10. Each filter head 10 is connected to a suction mechanism, which includes a negative pressure mechanism and a first pipe 7 communicating with the filter head 10. Since this embodiment has three filter heads 10, each connected to a first pipe 7, a total of three first connectors 6 are provided. Each first connector 6 is detachably connected to one end of a second pipe 2, thus a total of three second pipes 2 are provided in this embodiment. The negative pressure mechanism is connected to a third pipe 3. The negative pressure mechanism provides suction force to allow the sample solution to pass through the filter membrane. In this embodiment… It can be a negative pressure pump, or in other embodiments, other mechanisms that can provide suction force; the third pipe 3 is provided with three second connectors 4 that respectively cooperate with two second pipes 2, and the other end of each second pipe 2 is detachably connected to the second connector 4. Each first pipe 7 is provided with a check valve 13. The negative pressure mechanism is connected to the drain pipe 8. It should be noted that the filter head 10, the first pipe 7, the second pipe 2, the third pipe 3 and the drain pipe 8 form a continuous fluid flow channel. The liquid separated from the filter head 10 can flow out to the outside of the microbial limit detection filter along the first pipe 7, the second pipe 2, the third pipe 3 and the drain pipe 8. The second pipe 2 can be disposable or reusable. In this embodiment, to control costs, the second pipe 2 is reusable. Therefore, the first pipe 7, the second pipe 2, and the third pipe 3 are all made of stainless steel that can withstand high-temperature disinfection or disinfectant rinsing. After each filtration (or after a certain number of filtrations), the two ends of the second pipe 2 can be separated from the first pipe 7 and the third pipe 3, respectively. Then, the second pipe 2, the first pipe 7, and the third pipe 3 can be disinfected separately to improve the sterility of the microbial limit detection filter. It should be noted that the basic structure of the microbial limit detection filter not mentioned in this embodiment, such as how the filter head 10 and the filter cup are installed, how the power supply to the suction mechanism is provided, and how the suction force is controlled, are the same as in the prior art. Since there are no improvements, they will not be described in detail here. As for how to achieve a detachable connection between the second pipe 2 and the first pipe 7 and the third pipe 3, existing pipe joint structures can be used, such as flange loose-sleeve force transmission joints, compression fittings, etc. It should be noted that the joints used need to ensure that a closed negative pressure channel can be formed after the second pipe 2 is connected to the first pipe 7 and the third pipe 3, so as to ensure the smooth operation of filtration.

[0028] This invention makes the negative pressure channel (i.e., the channel composed of the first pipe 7, the second pipe 2, and the third pipe 3) a detachable (three-section) connection. Therefore, the middle second pipe 2 can be disassembled for replacement or sterilization. For example, if sterilization is performed using a flame gun, the second pipe 2 can be disassembled, and flames can be sprayed into the two ends of the second pipe 2 to kill bacteria inside. If necessary, disinfectant can be used to flush the second pipe 2 to improve the sterilization effect. Regarding the first pipe 7 and the third pipe 3... After the second pipe 2 is disassembled, flames can be sprayed into the first pipe 7 and the third pipe 3, which can also achieve a certain sterilization effect. In general, compared with the existing entire negative pressure channel, the segmented pipeline sterilization process is more convenient and thorough, avoiding the accumulation of pollutants in the waste liquid in the pipeline for a long time, so that the pollutants will contaminate the filter membrane during the filtration process, thus reducing the probability of contamination. At the same time, a check valve 13 is also installed on the first pipe 7. The check valve 13 is located close to the filter head 10. The check valve 13 prevents liquid backflow, which can effectively prevent waste liquid from flowing back and contaminating the filter membrane.

[0029] In one embodiment, the second pipe 2 can also be a disposable structure. Specifically, it can be made of rigid transparent plastic, and both ends of the second pipe 2 are provided with external threads. The first connector 6 and the second connector 4 are respectively rotatably mounted on the first pipe 7 and the third pipe 3, and are provided with matching internal threads. The threads enable a detachable connection (i.e., a compression fitting structure). It should be noted that using transparent plastic material not only allows the state inside the second pipe 2 to be seen, but also reduces costs.

[0030] In one embodiment, such as Figure 1 As shown, the first connector 6 and the second connector 4 are both set outwards, and the second pipe 2 has a U-shaped structure. This arrangement makes it easy to detachably connect the second pipe 2 to it, and there is enough space for installation and operation.

[0031] In one embodiment, the housing 1 is provided with a receiving groove, in which the first pipe 7, the second pipe 2, and the third pipe 3 are all disposed. This arrangement improves the overall integrity of the device and prevents accidental contact that could cause the second pipe 2 to detach.

[0032] In one embodiment, the receiving groove is provided with a groove cover 12, and the groove cover 12 is provided with an observation window, which is provided with transparent glass. The groove cover 12 can cover the receiving groove and reduce the entry of dust.

[0033] In one embodiment, one end of the slot cover 12 is hinged to the housing 1, and the other end is detachably connected via a slot 5 and a latch 11. The slot 5 and latch 11 allow for a detachable connection between one end of the slot cover 12 and the housing 1, ensuring the integrity of the device by opening the slot cover 12 only when needed.

[0034] In one embodiment, the filter head 10 is connected to the first pipe 7 via a connecting pipe. An adjustable electric valve is installed on the connecting pipe. The electric valve is electrically connected to a controller, which is electrically connected to a control display screen 9 mounted on the housing 1. The opening of the pipe can be adjusted via the electric valve, thereby adjusting the suction force to meet different filtration needs. The control display screen 9 can control the opening and closing of the negative pressure mechanism, etc.

[0035] The above embodiments can be combined in any way without contradicting each other to obtain the optimal technical solution.

[0036] The embodiments described above merely illustrate specific implementation methods of this application, and while the descriptions are detailed and specific, they should not be construed as limiting the scope of protection of this application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the technical solution of this application, and these modifications and improvements all fall within the scope of protection of this application.

Claims

1. A microbial limit test filter characterized by: The application relates to a filter device, which comprises a shell (1) provided with at least one filter head (10), a suction mechanism connected with the filter head (10), the suction mechanism comprising a negative pressure mechanism and a first pipeline (7) communicated with the filter head (10), a first connecting head (6) arranged on the first pipeline (7), one end of a second pipeline (2) being detachably connected with the first connecting head (6), the negative pressure mechanism being connected with a third pipeline (3), at least one second connecting head (4) being arranged on the third pipeline (3), the other end of the second pipeline (2) being detachably connected with the second connecting head (4), a check valve (13) being arranged on the first pipeline (7), and the negative pressure mechanism being connected with a liquid discharge pipe (8).

2. The microbial limit test filter according to claim 1, wherein: The second pipeline (2) is a disposable structure.

3. The microbial limit test filter according to claim 2, wherein: The second pipeline (2) is a U-shaped structure.

4. The microbial limit test filter according to claim 1, wherein: The shell (1) is provided with a containing groove, and the first pipeline (7), the second pipeline (2) and the third pipeline (3) are arranged in the containing groove.

5. The microbial limit test filter according to claim 4, wherein: A groove cover (12) is arranged on the containing groove, an observation window is arranged on the groove cover (12), and transparent glass is arranged on the observation window.

6. The microbial limit test filter according to claim 5, wherein: One end of the groove cover (12) is hinged with the shell (1), and the other end is detachably connected through the cooperation of a clamping groove (5) and a clamping head (11).

7. The microbial limit test filter according to any one of claims 1 to 6, characterized in that: The filter head (10) and the first pipeline (7) are connected through a connecting pipe, an electric valve with adjustable opening degree is arranged on the connecting pipe, a controller is electrically connected with the electric valve, and a control display screen (9) arranged on the shell (1) is electrically connected with the controller.

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