A precision-fitted filtration device

Abstract

This utility model relates to the field of microbial detection and filtration technology, and discloses a precision-fitted filtration device. It includes: a drain support, at least one connecting seat connected to the drain support, and a filter cup base engaged with the connecting seat; a switch element extending laterally through the connecting seat, operable to control the opening or closing of the internal channel of the connecting seat; an elastic element sleeved on the switch element, and a fixing element located at one end of the switch element abutting against the elastic element. By using a metal material for the switch element, the sealing risks caused by repeated high-temperature sterilization are avoided, increasing the service life and reliability of the switch element. Furthermore, the elastic force generated by the elastic element pushes the conical shaft, ensuring a tight fit between the conical section and the conical hole, while also increasing the damping feel during switch element rotation, improving the user experience.

Description

Technical Field

[0001] This utility model relates to the field of microbial detection and filtration technology, specifically to a precision-fitted filtration device. Background Technology

[0002] In existing microbial detection and filtration devices, the switching module typically uses a cylindrical shaft and hole as the core structure, supplemented by rubber parts such as fluororubber sealing rings to achieve the on / off control of the liquid circuit and the sealing function of the module to prevent liquid leakage.

[0003] However, such devices require high-temperature sterilization after use to ensure reliability for subsequent applications. But rubber components gradually age after repeated exposure to significant temperature changes, leading to a decrease in their sealing ability and an inability to effectively guarantee the module's seal, thus affecting the device's normal operation and the accuracy of testing. Utility Model Content

[0004] The purpose of this invention is to provide a precision-fitted filtration device to address the aforementioned shortcomings of the prior art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A precision-fit filtration device includes: a drain support, at least one connecting seat communicating with the drain support, and a filter cup base engaging with the connecting seat.

[0007] A switch element extends laterally through the connector and is operable to control the opening or closing of the internal channel of the connector; an elastic element is sleeved on the switch element, and a fixing element is disposed at one end of the switch element and abuts against the elastic element.

[0008] As a preferred embodiment of this utility model, the switch is a tapered shaft made of metal.

[0009] As a preferred embodiment of this utility model, the tapered shaft includes, in sequence along the axial direction, an installation section, a tapered section, and a fixing section.

[0010] As a preferred embodiment of this utility model, the connecting seat has a tapered hole that communicates with the channel in the transverse direction, and the tapered hole is adapted to fit the tapered segment.

[0011] In a preferred embodiment of this utility model, a through hole is provided on the tapered section, and the tapered shaft is configured such that: when the through hole is aligned with the channel, the channel is open; when the through hole is misaligned with the channel, the channel is closed.

[0012] In a preferred embodiment of this utility model, the connecting seat has an installation opening corresponding to the position of the fixing segment, and the fixing segment passes through the installation opening; the fixing member includes a limiting part connected to the end of the fixing segment, and the limiting part is located outside the installation opening.

[0013] In a preferred embodiment of this utility model, the elastic element is a spring, which is sleeved on the fixed section;

[0014] One end of the spring abuts against the wall of the mounting opening, and the other end abuts against the limiting part. It uses its elastic force to push the tapered shaft so that the tapered section and the tapered hole maintain a tight fit.

[0015] As a preferred embodiment of this utility model, the mounting section is provided with an operating part for manually operating the rotation of the tapered shaft.

[0016] As a preferred embodiment of this utility model, the connecting seat is provided with a slot, and the snap-fit ​​part of the filter cup base is adapted to fit the slot; the bottom of the slot is provided with a sealing ring for forming a seal with the filter cup base.

[0017] As a preferred embodiment of the present invention, the drainage support includes: a drainage pipe communicating with the connecting seat, and a bracket for supporting the drainage pipe.

[0018] This invention offers the following advantages: By using a metal material for the switch component, the sealing risks associated with repeated high-temperature sterilization are avoided, increasing the service life and reliability of the switch component. Furthermore, the elastic force generated by the elastic element pushes the tapered shaft, ensuring a tight fit between the tapered section and the tapered hole, while also increasing the damping feel during switch rotation, thus enhancing the user experience. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0020] Figure 1 This is a schematic diagram of the overall filtration device of this utility model.

[0021] Figure 2 This is a cross-sectional structural diagram of the present invention.

[0022] Figure 3 This is a cross-sectional view of the switchless structure of this utility model.

[0023] Figure 4 This is a schematic diagram of the tapered shaft structure of this utility model.

[0024] Explanation of reference numerals in the attached figures:

[0025] 100. Drainage support; 11. Drainage pipe; 12. Bracket; 200. Connecting seat; 21. Channel; 22. Tapered hole; 23. Mounting port; 24. Slot; 300. Filter cup base; 31. Snap-fit ​​part; 400. Switch; 41. Tapered shaft; 411. Mounting section; 412. Tapered section; 4121. Through hole; 413. Fixing section; 500. Elastic element; 51. Spring; 600. Fixing element; 61. Limiting part; 700. Operating part. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] like Figure 1-4 As shown, this utility model provides a precision-fitted filtration device, which is a special equipment for microbial detection and inspection. It achieves the purpose of microbial retention by negative pressure filtration. The product is used in conjunction with a diaphragm liquid pump for direct liquid discharge.

[0028] In some embodiments, the filtration device includes: a drain support 100, a connecting seat 200, a filter cup base 300, a switch 400, an elastic element 500, and a fixing element 600. In use, the filter cup with the filter membrane is assembled onto the filter cup base 300, making operation simple and quick, requiring no complex installation steps or tools, facilitating rapid preparation for microbial testing. When extracting liquid, the liquid flows from top to bottom through the filter cup base 300 and the connecting seat 200, and is discharged into the drain support 100. The switch 400 manually controls the opening or closing of the channel 21 of the connecting seat 200, allowing the user to control the start and end of the filtration process at any time according to actual operational needs, flexibly performing microbial testing. Furthermore, the cooperation between the elastic element 500 and the fixing element 600 improves the sealing between the switch 400 and the connecting seat 200 and the accuracy of the test.

[0029] Specifically, the drain support 100 includes a drain pipe 11, which is a straight cylindrical structure, easy to process, low in cost, and facilitates the flow of internal liquid. One end of the drain pipe 11 is closed (with a plug), and the other end can be connected to external devices or hoses (with a connector). This structure is clear and easy to install. However, a bracket 12 is also provided on the drain pipe 11 to support its horizontal placement. The brackets 12 are spaced apart and located at both ends of the drain pipe 11, forming a stable two-point support to prevent the drain pipe 11 from tilting or shaking due to weight or external force. At the same time, it avoids liquid residue or uneven flow caused by tilting, thus improving filtration accuracy.

[0030] At least one connecting seat 200 is connected to the drain seat, and the number of connecting seats can be increased or decreased according to the actual filtration needs. It is suitable for single, triple or multi-stage filtration. The connecting seat 200 and the drain seat are welded together.

[0031] A filter cup base 300 is snapped onto the connector 200. Specifically, a slot 24 is provided on the connector 200, and the snap-fit ​​portion 31 of the filter cup base 300 is adapted to fit into the slot 24. This snap-fit ​​connection eliminates the need for threaded tightening, making installation and disassembly quicker and easier, facilitating filter cup replacement or cleaning and maintenance. The bottom of the slot 24 is equipped with a sealing ring to form a seal with the filter cup base 300, preventing liquid leakage during filtration or drainage, improving filtration accuracy and operational safety, and avoiding liquid spillage due to poor sealing, which could contaminate the experimental environment or affect the filtration effect.

[0032] In addition, a switch 400 extends laterally through the connector 200, which is operable to control the opening or closing of the internal channel 21 of the connector 200.

[0033] Specifically, in some embodiments, the switch element 400 is a tapered shaft 41 made of metal, including but not limited to zinc, iron, tin, lead, chromium, and manganese, rather than rigid plastics or ceramics. This makes the filter device less prone to aging, deformation, or cracking during high-temperature sterilization, improving the service life and structural reliability of the switch element 400. Furthermore, the surface of the tapered shaft 41 is treated with a nitriding process, further extending the service life of the switch element 400.

[0034] The tapered shaft 41 comprises, along its axial direction, a mounting section 411, a tapered section 412, and a fixing section 413. An operating part 700 for manually rotating the tapered shaft 41 is provided on the mounting section 411. The operating part 700 can be a knob as shown in the figure, or any other component that allows the tapered shaft 41 to rotate. The operating part 700 and the tapered shaft 41 are fixedly engaged by bolts.

[0035] The connecting seat 200 has a transversely formed tapered hole 22 communicating with the channel 21, and the tapered hole 22 is adapted to fit the tapered section 412. The tapered fit provides a progressive sealing pressure, which has better sealing performance than a cylindrical valve core.

[0036] A through hole 4121 is provided on the tapered section 412. The tapered shaft 41 is configured such that when the through hole 4121 is aligned with the channel 21 (the through hole 4121 is connected to the channel 21, and the knob is in a vertical position), the channel 21 is open; when the through hole 4121 is misaligned with the channel 21 (the through hole 4121 is not connected to the channel 21, and the knob is in a horizontal position), the channel 21 is closed. The above operation is very convenient.

[0037] Additionally, a spring-loaded element 500 is fitted onto the switch component 400, and a fixing element 600 is disposed at one end of the switch component 400, abutting against the spring-loaded element 500. Specifically, the connecting seat 200 has a mounting opening 23 corresponding to the position of the fixing section 413, through which the fixing section 413 passes. The fixing element 600 includes a limiting part 61 connected to the end of the fixing section 413, located outside the mounting opening 23. This prevents the fixing section 413 from fully retracting, ensuring the relative position stability between the switch component 400 and the connecting seat 200, and improving the structural stability of the device. The limiting part 61 can be any structure that can achieve the limiting function, such as a cap, nut, retaining ring, or riveted end.

[0038] The elastic element 500 is a spring 51, which is sleeved on the fixed section 413. One end of the spring 51 abuts against the wall of the mounting opening 23, and the other end abuts against the limiting part 61. Its elastic force pushes the tapered shaft 41, ensuring a tight fit between the tapered section 412 and the tapered hole 22 under all operating conditions. This means that compensation can be made for machining tolerances, thermal expansion and contraction, and mechanical wear. This improves the sealing between the switch element 400 and the connecting seat 200, enhances the detection accuracy of the device, and also increases the damping feel when the tapered shaft 41 rotates, improving the user experience.

[0039] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A precision fit filtration device, characterized in that, include: A drainage support, at least one connecting seat connected to the drainage support, and a filter cup base engaged with the connecting seat; A switch element extends laterally through the connector and is operable to control the opening or closing of the internal channel of the connector; an elastic element is sleeved on the switch element, and a fixing element is disposed at one end of the switch element and abuts against the elastic element.

2. The precision-fitted filtration device according to claim 1, characterized in that: The switch is a tapered shaft made of metal.

3. The precision fit filtration device of claim 2, wherein: The tapered shaft comprises, in sequence along the axial direction, an installation section, a tapered section, and a fixing section.

4. The precision fit filtration device of claim 3, wherein: The connecting seat has a tapered hole that communicates with the channel in the horizontal direction, and the tapered hole is adapted to fit the tapered section.

5. The precision fit filtration device of claim 4, wherein: The tapered section has a through hole, and the tapered shaft is configured such that when the through hole is aligned with the channel, the channel is open; and when the through hole is misaligned with the channel, the channel is closed.

6. The precision fit filtration device of claim 3, wherein: The connecting seat has an installation opening corresponding to the position of the fixed section, and the fixed section passes through the installation opening; the fastener includes a limiting part connected to the end of the fixed section, and the limiting part is located outside the installation opening.

7. The precision fit filtration device of claim 6, wherein: The elastic element is a spring, which is sleeved on the fixed section; One end of the spring abuts against the wall of the mounting opening, and the other end abuts against the limiting part. It uses its elastic force to push the tapered shaft so that the tapered section and the tapered hole maintain a tight fit.

8. The precision fit filtration device of claim 3, wherein: The mounting section is equipped with an operating part for manually rotating the tapered shaft.

9. The precision fit filtration device of claim 1, wherein: The connector has a slot, and the snap-fit ​​part of the filter cup base is adapted to fit the slot; the bottom of the slot is provided with a sealing ring for forming a seal with the filter cup base.

10. The precision fit filtration device of claim 1, wherein: The drainage support includes: a drainage pipe communicating with the connecting seat, and a bracket for supporting the drainage pipe.

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