A microbial limit tester for food testing

Abstract

This invention provides a microbial limit tester for food testing, comprising a stable base, a support body, a negative pressure pump, a liquid outlet pipe, a connecting seat, and a specimen container. The support body is fixedly installed on the surface of the stable base, and the negative pressure pump is fixedly installed on the outside of the support body. The liquid outlet pipe is fixedly installed at the output end of the negative pressure pump. The connecting seat is fixedly installed at the top of the support body, and the specimen container is engaged and installed above the connecting seat. The design of the connecting seat and specimen container allows for quick placement and removal of the sampling filter paper, rapid disassembly for open flame sterilization, and multiple filtration of samples, enabling the discharge of bacteria from the sample after multiple filtrations.

Description

Technical Field

[0001] This utility model relates to the field of food testing technology, and in particular to a microbial limit tester for food testing. Background Technology

[0002] A food microbial limit analyzer is a specialized device used to determine the microbial content in food. Its core function is to trap microorganisms in a sample on a specific filter membrane using filtration enrichment technology. This instrument typically employs a negative pressure filtration system, allowing liquid samples to pass sequentially through pre-filtration and precision filtration devices, effectively separating microorganisms from the sample matrix. The filtered membrane can then be directly used for culture counting or molecular detection. The equipment is equipped with sterilizable stainless steel filter components and standardized filter membranes, ensuring that the testing process complies with pharmacopoeia or food safety standards. It is widely used by food production enterprises, testing institutions, and research units for the hygienic quality assessment of various foods. However, existing food microbial limit analyzers still suffer from problems such as inconvenient removal and placement of sampling filter paper, inability to quickly disassemble for open flame sterilization, inability to filter samples multiple times, and direct release of bacteria from the sample.

[0003] Therefore, it is essential to invent a microbial limit tester for food testing. Utility Model Content

[0004] To address the aforementioned technical problems, this utility model provides a microbial limit analyzer for food testing, solving the issues that existing microbial limit analyzers for food testing still suffer from: inconvenient sample filter paper placement and removal, inability to quickly disassemble for open flame sterilization, inability to filter samples multiple times, and direct release of bacteria from the sample. The microbial limit analyzer for food testing includes a stable base, a support body, a negative pressure pump, an outlet pipe, a connecting seat, and a specimen container. The support body is fixedly mounted on the surface of the stable base, and the negative pressure pump is fixedly mounted on the outside of the support body. The outlet pipe is fixedly mounted on the output end of the negative pressure pump. The connecting seat is fixedly mounted on the top of the support body, and the specimen container is engaged with the connecting seat above it.

[0005] The connecting seat includes a connecting platform, a secondary filtration section, a docking frame, and a secondary filter element. The connecting platform is fixedly installed on the top of the support body, and the secondary filtration section is fixedly installed on the top of the connecting platform. The docking frame is fixedly installed on the top of the secondary filtration section. The secondary filter element fills the interior of the secondary filtration section.

[0006] The specimen container includes a docking seat, a positioning frame, a primary filter element, an adsorption ring, a connecting tube, and a sample injection container. The positioning frame is fixedly installed at the bottom of the docking seat, and the docking seat and the positioning frame are slidably installed inside the docking frame. The primary filter element is installed at the bottom of the positioning frame by a snap-fit, and the adsorption ring is adsorbed on the surface of the positioning frame, located inside the docking seat. The connecting tube is fixedly installed above the adsorption ring. The sample injection container is slidably installed inside the connecting tube.

[0007] The connecting platform, secondary filtration section, and docking frame inside the connecting seat are all made of stainless steel, forming a metal cylinder that is open at both ends and can be removed for open flame sterilization. The secondary filter element is a cylindrical filter element that can be removed and replaced separately.

[0008] The docking seat and positioning frame inside the specimen container form an L-shaped stainless steel metal ring, and the adsorption ring uses a ring magnet, which can be directly adsorbed onto the surface of the positioning frame; the adsorption ring and the positioning frame form a ring-shaped contact surface and clamp the filter paper; the primary filter element can press against the unstressed part of the middle of the filter paper from bottom to top; the connecting tube is a stainless steel metal tube, and the opening at the bottom of the sample injection container can be directly inserted into the interior of the connecting tube.

[0009] Compared with the prior art, the present invention has the following beneficial effects:

[0010] 1. The connecting seat of this utility model, as a core functional module of the microbial limit analyzer, mainly undertakes the following functions: serving as a connecting bridge between the support body and the specimen container, ensuring structural stability; its internal secondary filtration zone and secondary filter element provide fine filtration, achieving efficient microbial retention in conjunction with the negative pressure pump; the stainless steel connecting seat, secondary filtration zone, and docking frame can be completely disassembled and sterilized by open flame, meeting aseptic testing requirements; simultaneously, the docking frame and the positioning frame of the specimen container fit tightly together, ensuring liquid sealing and guidance, and preventing leakage. The overall modular design facilitates quick disassembly, filter element replacement, and cleaning maintenance, significantly improving testing efficiency and reliability.

[0011] 2. The specimen container of this utility model receives the liquid to be tested through a sample injection container. After being guided by a connecting tube, the liquid is sampled and filtered by filter paper, followed by initial filtration of the filtrate through a filter cartridge. The magnetic design of the adsorption ring, combined with the positioning frame, enables rapid fixation and sealing of the filter paper, preventing liquid leakage. The sliding connection between the docking seat and the connecting seat ensures convenient modular assembly and disassembly. The all-stainless steel positioning frame and docking seat support high-temperature sterilization. The overall design balances aseptic operation requirements with testing efficiency, making it a key functional unit for ensuring microbial retention and detection accuracy. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model.

[0013] Figure 2 This is a structural schematic diagram of the connector of this utility model.

[0014] Figure 3 This is a schematic diagram of the specimen container of this utility model.

[0015] In the picture:

[0016] 1. Stabilizing base, 2. Support body, 3. Negative pressure pump, 4. Discharge pipe, 5. Connecting seat, 51. Connecting platform, 52. Secondary filtration zone, 53. Docking frame, 54. Secondary filter element, 6. Specimen container, 61. Docking seat, 62. Positioning frame, 63. Primary filter element, 64. Adsorption ring, 65. Connecting pipe, 66. Sample injection container. Detailed Implementation

[0017] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0018] As attached Figure 1 To be continued Figure 3 As shown.

[0019] This utility model provides a microbial limit tester for food testing, comprising a stable base 1, a support body 2, a negative pressure pump 3, a liquid outlet pipe 4, a connecting seat 5, and a specimen container 6. The support body 2 is fixedly installed on the surface of the stable base 1, and the negative pressure pump 3 is fixedly installed on the outside of the support body 2. The liquid outlet pipe 4 is fixedly installed on the output end of the negative pressure pump 3. The connecting seat 5 is fixedly installed on the top of the support body 2, and the specimen container 6 is engaged and installed above the connecting seat 5.

[0020] The connecting seat 5 includes a connecting platform 51, a secondary filtration section 52, a docking frame 53, and a secondary filter element 54. The connecting platform 51 is fixedly installed on the top of the support body 2, and the secondary filtration section 52 is fixedly installed on the top of the connecting platform 51. The docking frame 53 is fixedly installed on the top of the secondary filtration section 52. The secondary filter element 54 is filled inside the secondary filtration section 52.

[0021] The specimen container 6 includes a docking seat 61, a positioning frame 62, a primary filter element 63, an adsorption ring 64, a connecting tube 65, and a sample injection container 66. The positioning frame 62 is fixedly installed at the bottom of the docking seat 61, and the docking seat 61 and the positioning frame 62 are slidably installed inside the docking frame 53. The primary filter element 63 is installed at the bottom of the positioning frame 62 by a snap-fit, and the adsorption ring 64 is adsorbed on the surface of the positioning frame 62, located inside the docking seat 61. The connecting tube 65 is fixedly installed above the adsorption ring 64. The sample injection container 66 is slidably installed inside the connecting tube 65.

[0022] The connecting platform 51, secondary filtration section 52 and docking frame 53 inside the connecting seat 5 are all made of stainless steel and together form a metal cylinder that is open at the top and bottom and can be removed for open flame sterilization. The secondary filter element 54 is a cylindrical filter element that can be removed and replaced separately.

[0023] The docking seat 61 and positioning frame 62 inside the specimen container 6 form an L-shaped stainless steel metal ring, and the adsorption ring 64 is a ring magnet that can be directly adsorbed onto the surface of the positioning frame 62; the adsorption ring 64 and the positioning frame 62 form a ring-shaped contact surface and clamp the filter paper; the primary filter core 63 can abut against the unstressed part of the middle of the filter paper from bottom to top; the connecting tube 65 is a stainless steel metal tube, and the opening at the bottom of the sample injection container 66 can be directly inserted into the interior of the connecting tube 65.

[0024] The food microbial limit analyzer operates based on the principles of negative pressure filtration and staged filtration: the sample to be tested first enters the system through the sample injection hopper 66, is guided to the sampling filter paper through the connecting tube 65, and then enters the primary filter element 63 for filtration; the negative pressure generated by the negative pressure pump 3 drives the filtrate to continue through the secondary filter element 54 for precision filtration, and finally the filtrate is discharged through the outlet pipe 4, while microorganisms are trapped on the filter membrane. The entire process ensures efficient and pollution-free filtration through the magnetic sealing of the adsorption ring 64 and the staged filtration design.

[0025] The equipment employs a modular design for aseptic testing: the stainless steel connecting table 51 and docking frame 53 support high-temperature sterilization, while the detachable specimen container 6 and replaceable filter cartridges prevent cross-contamination. This design not only meets GMP requirements but also gives the equipment advantages such as high filtration efficiency and ease of operation, making it particularly suitable for microbial limit testing of complex matrix foods such as dairy products and condiments.

[0026] Any technical solution that achieves the above-mentioned technical effects by utilizing the technical solution described in this utility model, or by designing a similar technical solution inspired by the technical solution described in this utility model, falls within the protection scope of this utility model.

Claims

1. A microbial limit tester for food testing, characterized in that: It includes a stabilizing base (1), a support body (2), a negative pressure pump (3), an outlet pipe (4), a connecting seat (5), and a specimen container (6), wherein: the support body (2) is fixedly installed on the surface of the stabilizing base (1), and the negative pressure pump (3) is fixedly installed on the outside of the support body (2), and the outlet pipe (4) is fixedly installed at the output end of the negative pressure pump (3); the connecting seat (5) is fixedly installed on the top of the support body (2), and the specimen container (6) is engaged and installed above the connecting seat (5).

2. The microbial limit detector for food testing as described in claim 1, characterized in that: The connecting seat (5) includes a connecting platform (51), a secondary filtration section (52), a docking frame (53), and a secondary filter element (54). The connecting platform (51) is fixedly installed on the top of the support body (2), and the secondary filtration section (52) is fixedly installed on the top of the connecting platform (51). The docking frame (53) is fixedly installed on the top of the secondary filtration section (52). The secondary filter element (54) is filled inside the secondary filtration section (52).

3. The microbial limit analyzer for food testing as described in claim 1, characterized in that: The specimen container (6) includes a docking seat (61), a positioning frame (62), a primary filter element (63), an adsorption ring (64), a connecting tube (65), and a sample injection container (66). The positioning frame (62) is fixedly installed at the bottom of the docking seat (61), and the docking seat (61) and the positioning frame (62) are slidably installed inside the docking frame (53). The primary filter element (63) is installed at the bottom of the positioning frame (62) by a snap fastener, and the adsorption ring (64) is adsorbed on the surface of the positioning frame (62) and located inside the docking seat (61). The connecting tube (65) is fixedly installed above the adsorption ring (64). The sample injection container (66) is slidably installed inside the connecting tube (65).

4. The microbial limit tester for food testing as described in claim 2, characterized in that: The connecting platform (51), secondary filtration zone (52) and docking frame (53) inside the connecting seat (5) are all made of stainless steel metal, forming a metal cylinder that is open from top to bottom, and can be removed for open flame sterilization. The secondary filter element (54) is a cylindrical filter element that can be removed and replaced separately.

5. The microbial limit tester for food testing as described in claim 3, characterized in that: The docking seat (61) and positioning frame (62) inside the specimen container (6) form an L-shaped stainless steel metal ring, and the adsorption ring (64) is a ring magnet that can be directly adsorbed onto the surface of the positioning frame (62); the adsorption ring (64) and the positioning frame (62) form a ring-shaped contact surface and clamp the filter paper; the first filter core (63) can press against the unstressed position in the middle of the filter paper from bottom to top; the connecting tube (65) is a stainless steel metal tube, and the opening at the bottom of the sample injection container (66) can be directly inserted into the interior of the connecting tube (65).

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