CN220040212U - Negative pressure suction structure of filter membrane for detecting microscope cleanliness - Google Patents
Negative pressure suction structure of filter membrane for detecting microscope cleanliness Download PDFInfo
- Publication number
- CN220040212U CN220040212U CN202320894829.5U CN202320894829U CN220040212U CN 220040212 U CN220040212 U CN 220040212U CN 202320894829 U CN202320894829 U CN 202320894829U CN 220040212 U CN220040212 U CN 220040212U
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- Prior art keywords
- negative pressure
- filter membrane
- mounting seat
- cleanliness
- sealing plate
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- 239000012528 membrane Substances 0.000 title claims abstract description 59
- 230000003749 cleanliness Effects 0.000 title claims abstract description 15
- 238000007789 sealing Methods 0.000 claims abstract description 32
- 238000009423 ventilation Methods 0.000 claims abstract description 28
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 239000002245 particle Substances 0.000 abstract description 16
- 230000015572 biosynthetic process Effects 0.000 abstract description 2
- 239000008187 granular material Substances 0.000 abstract description 2
- 239000011521 glass Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 239000003344 environmental pollutant Substances 0.000 description 3
- 231100000719 pollutant Toxicity 0.000 description 3
- 238000005056 compaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000003384 imaging method Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 230000031700 light absorption Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000001000 micrograph Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000011179 visual inspection Methods 0.000 description 1
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- Sampling And Sample Adjustment (AREA)
Abstract
The utility model discloses a filter membrane negative pressure suction structure for detecting microscope cleanliness, which comprises a mounting seat, a filter membrane, a pressing ring, a ventilation core, a sealing plate and a negative pressure joint, wherein the mounting seat is provided with a plurality of air inlets; the mounting seat is provided with a mounting hole, the ventilation core is arranged in the mounting hole, the ventilation core is provided with a plurality of uniform ventilation holes, the filter membrane is flatly laid on the ventilation core, and the pressing ring is abutted against the mounting seat and presses the circumferential edge of the filter membrane; the sealing plate can be detached and arranged below the ventilation core and is spaced apart from the ventilation core to form a negative pressure cavity, the negative pressure connector is arranged on the mounting seat, a negative pressure hole is arranged in the mounting seat, and the negative pressure connector is communicated with the negative pressure cavity through the negative pressure hole. This scheme adopts the negative pressure absorbing mode to fix the filter membrane to maintain always through the negative pressure, make the roughness of filter membrane improve, help microscope formation of image clear, particle count and size information statistics are accomplished to the image that can perfect capture granule.
Description
Technical Field
The utility model relates to the technical field of microscope filter membrane fixing, in particular to a filter membrane negative pressure suction structure for detecting microscope cleanliness.
Background
The cleanliness refers to the degree of contamination of parts, assemblies and specific parts of the whole machine by impurities. The method for measuring the cleanliness is numerous and mainly comprises the following steps: visual inspection, contact angle, fluorescence, weight, particle size, and the like. The method is characterized in that the method is based on the principle that the impurity collection method is the same as the weight method according to the fact that the detected surface and pollutant particles have different light absorption or scattering rates, after a filter membrane is dried, the filter membrane is detected under light irradiation by using a microscope, and the pollutant particles are counted according to the particle size and the quantity, so that a solid particle pollutant result of the detected object part can be obtained.
However, when the filter is scanned with microscope cleanliness, the deformation amount exceeds the depth of field of the microscope objective due to the deformation (generally irregular warping after drying) of the filter, and the microscope imaging is unclear, thereby greatly influencing the counting of particles in the microscope image and the statistics of size information.
At present, two means are generally available for solving the problem of deformation of the filter membrane; (1) The outer circle of the filter membrane is pressed and fixed through the screw or the bayonet, so that the filter membrane is attached to the round supporting plate, however, the screw or the bayonet is pressed and fixed only on the outer circle of the filter membrane, and the central part of the filter membrane is deformed due to stress or the filter membrane cannot be deformed; (2) And a piece of glass (or transparent acrylic) is pressed on the upper surface of the filter membrane, so that the filter membrane is leveled. Although the filter can be flattened by glass compaction, there are several problems. A. Particles on the filter membrane can change the morphology of the particles (generally, the height value can be lowered) after the particles are flattened by glass; B. particles on the filter membrane can be adsorbed on the lower surface of the glass so as to lose the particles; C. after compaction of the glass, the metallic character of the particles could not be identified by polarized light, as measured under a metallographic microscope. New means are therefore required to solve the problem of filter membrane deformation.
Disclosure of Invention
The present utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, an object of the present utility model is to provide a negative pressure suction structure of a filter membrane for detecting cleanliness of a microscope.
The technical scheme of the utility model is as follows: the negative pressure suction structure of the filter membrane for detecting the cleanliness of the microscope is characterized by comprising a mounting seat, the filter membrane, a pressing ring, a ventilation core, a sealing plate and a negative pressure connector;
the filter membrane is horizontally laid on the air permeable core, and the pressing ring is abutted against the mounting seat and presses the circumferential edge of the filter membrane;
the sealing plate can be detachably arranged below the ventilation core and is spaced apart from the ventilation core to form a negative pressure cavity, the negative pressure connector is arranged on the mounting seat, a negative pressure hole is arranged in the mounting seat, and the negative pressure connector is communicated with the negative pressure cavity through the negative pressure hole.
Further, the ventilation core is a sand core tool.
Further, an annular groove is formed in the outer peripheral wall of the pressing ring to form a step portion, the pressing ring abuts against the circumferential upper edge of the mounting hole, and the step portion stretches into the mounting hole and presses the circumferential edge of the filter membrane.
Further, the bottom of the mounting hole is provided with a mounting groove, and the sealing plate is detachably arranged in the mounting groove.
Further, a sealing piece is arranged in the mounting groove, the sealing plate is arranged on the outer side of the sealing piece, and the sealing plate is detachably connected with the mounting seat through a screw.
Compared with the prior art, the utility model has the following beneficial effects:
1. according to the scheme, the filter membrane is fixed in a negative pressure adsorption mode, and the flatness of the filter membrane is improved through the constant maintenance of the negative pressure, so that the microscope imaging is helped to be clear, and the particle counting and size information statistics can be completed by perfectly capturing the images of particles;
2. the ventilation core has ventilation uniformity, and can ensure that the pressure of each position of the filter membrane is uniform, so that the filter membrane is smooth;
3. the used pressing ring is used for tightly pressing the circumferential edge of the filter membrane on the ventilation core to form a closed ring, so that the negative pressure can be always maintained in an effective area, and the negative pressure adsorption effect is ensured;
4. the structure has simple overall structure, is convenient for the existing microscope to reform and upgrade, and has strong practicability.
Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.
Drawings
For a clearer description of embodiments of the utility model or of solutions in the prior art, the drawings that are required to be used in the description of the embodiments or of the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the utility model, and that other drawings can be obtained, without the inventive effort, by a person skilled in the art from these drawings:
FIG. 1 is a schematic cross-sectional view of the present utility model;
fig. 2 is a schematic top view of the present utility model.
Reference numerals:
1. a mounting base; 2. a filter membrane; 3. a pressing ring; 4. a ventilation core; 5. a sealing plate; 6. a negative pressure joint; 7. a negative pressure chamber; 8. a negative pressure hole; 9. a step portion; 10. a mounting groove; 11. and a sealing sheet.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. In the description of the present utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "inner", "outer", "vertical", "circumferential", "radial", "axial", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.
In the description of the utility model, a "first feature" or "second feature" may include one or more of such features. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature.
In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.
The negative pressure suction structure of the filter membrane 2 for detecting the cleanliness of the microscope shown in the figures 1-2 comprises a mounting seat 1, the filter membrane 2, a pressing ring 3, a ventilation core 4, a sealing plate 5 and a negative pressure joint 6;
the mounting seat 1 is provided with a mounting hole, the ventilation core 4 is arranged in the mounting hole, the ventilation core 4 is provided with a plurality of uniform ventilation holes, the filter membrane 2 is flatly paved on the ventilation core 4, and the pressing ring 3 is abutted against the mounting seat 1 and presses the circumferential edge of the filter membrane 2;
the sealing plate 5 is detachably arranged below the ventilation core 4 and is spaced apart from the ventilation core 4 to form a negative pressure cavity 7, the negative pressure connector 6 is arranged on the mounting seat 1, a negative pressure hole 8 is arranged in the mounting seat 1, and the negative pressure connector 6 is communicated with the negative pressure cavity 7 through the negative pressure hole 8.
Specifically, the ventilation core 4 used in the structure is a sand core tool, and the sand core tool has good ventilation uniformity, so that when negative pressure is generated to suck the filter membrane 2, the pressure uniformity at each position of the filter membrane 2 can be ensured, and the uniform suction of the filter membrane 2 is realized. Of course, the air-permeable core 4 may be made of a material having uniform air permeability, which is not limited thereto.
The pressing ring 3 used in the structure is mainly used for tightly pressing the circumferential edge of the filter membrane 2 on the ventilation core 4 to form a closed ring, so that negative pressure can be always maintained in an effective area. As shown in fig. 1, an annular groove is formed in the outer peripheral wall of the pressing ring 3 to form a step portion 9, the pressing ring 3 abuts against the circumferential upper edge of the mounting hole, the step portion 9 extends into the mounting hole and presses the circumferential edge of the filter membrane 2, and the step portion 9 is designed to facilitate positioning of the pressing ring 3 and fixing of the filter membrane 2.
The sealing plate 5 used in the structure is used for sealing the space below the air permeable core 4, so that when the negative pressure connector 6 is connected with an external negative pressure device, negative pressure can be generated in the negative pressure cavity 7, and then the filter membrane 2 is sucked flat through the air permeable core 4.
In practical application, as shown in fig. 1, a mounting groove 10 is formed at the bottom of the mounting hole, and the size of the mounting groove 10 is matched with that of the sealing plate 5, so that the sealing plate 5 is conveniently mounted in the mounting groove 10 to be detachably connected with the mounting seat 1.
Further, the sealing plate 11 is further provided in the mounting groove 10, and the sealing plate 5 is provided outside the sealing plate 11, so that the sealing effect can be further enhanced by the provision of the sealing plate 11. The sealing plate 11 and the sealing plate 5 are provided with through holes, the mounting seat 1 is provided with a threaded hole, and therefore the sealing plate 5 and the mounting seat 1 can be detachably connected through screws, and the connecting mode is simple and convenient to disassemble and assemble.
This structure is at the during operation, and negative pressure joint 6 connects outside negative pressure device, just so can inhale the filter membrane 2 through certain negative pressure and level on ventilative core 4, and ventilative core 4 has ventilative homogeneity, can guarantee that filter membrane 2 positions are all pressure uniform, and rethread filter membrane 2 outlying clamping ring 3 lets the negative pressure maintain always, makes the roughness of filter membrane 2 improve, and the help microscope formation of image is clear, and particle count and size information statistics are accomplished to the image of capture granule that can be perfect. The structure has simple overall structure, is convenient for the existing microscope to reform and upgrade, and has strong practicability.
While embodiments of the present utility model have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the utility model, the scope of which is defined by the claims and their equivalents.
Claims (5)
1. The negative pressure suction structure of the filter membrane for detecting the cleanliness of the microscope is characterized by comprising a mounting seat, the filter membrane, a pressing ring, a ventilation core, a sealing plate and a negative pressure connector;
the filter membrane is horizontally laid on the air permeable core, and the pressing ring is abutted against the mounting seat and presses the circumferential edge of the filter membrane;
the sealing plate can be detachably arranged below the ventilation core and is spaced apart from the ventilation core to form a negative pressure cavity, the negative pressure connector is arranged on the mounting seat, a negative pressure hole is arranged in the mounting seat, and the negative pressure connector is communicated with the negative pressure cavity through the negative pressure hole.
2. The negative pressure suction structure of a filter membrane for detecting microscope cleanliness according to claim 1, wherein the air permeable core is a sand core tool.
3. The negative pressure suction structure of a filter membrane for detecting the cleanliness of a microscope according to claim 1, wherein an annular groove is formed in the outer peripheral wall of the pressing ring to form a stepped portion, the pressing ring abuts against the circumferential upper edge of the mounting hole, and the stepped portion extends into the mounting hole and presses the circumferential edge of the filter membrane.
4. The negative pressure suction structure of a filter membrane for detecting the cleanliness of a microscope according to claim 1, wherein a mounting groove is formed in the bottom of the mounting hole, and the sealing plate is detachably arranged in the mounting groove.
5. The negative pressure suction structure of a filter membrane for detecting the cleanliness of a microscope according to claim 4, wherein a sealing piece is arranged in the mounting groove, the sealing plate is arranged on the outer side of the sealing piece, and the sealing plate is detachably connected with the mounting seat through a screw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320894829.5U CN220040212U (en) | 2023-04-20 | 2023-04-20 | Negative pressure suction structure of filter membrane for detecting microscope cleanliness |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320894829.5U CN220040212U (en) | 2023-04-20 | 2023-04-20 | Negative pressure suction structure of filter membrane for detecting microscope cleanliness |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220040212U true CN220040212U (en) | 2023-11-17 |
Family
ID=88727641
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320894829.5U Active CN220040212U (en) | 2023-04-20 | 2023-04-20 | Negative pressure suction structure of filter membrane for detecting microscope cleanliness |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220040212U (en) |
-
2023
- 2023-04-20 CN CN202320894829.5U patent/CN220040212U/en active Active
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