Negative-pressure suction flattening structure of cleanliness particle detection filter membrane

Abstract

The utility model discloses a negative pressure suction flattening structure of a cleanliness particle detection filter membrane, and relates to the technical field of cleanliness particle detection. The utility model comprises a cylindrical mounting seat, a plurality of clamping blocks and a plurality of clamping blocks, the negative pressure cavity is formed in the mounting base, a clamping groove is formed in the mounting base, a placing plate is connected to the clamping groove in a clamping mode, and a plurality of through holes are formed in the placing plate in an array distribution mode; and the sealing ring is placed at the top of the placing plate. When the inside of the negative pressure cavity is pumped into a negative pressure state through the negative pressure source, the filter membrane is adsorbed on the placing plate, and due to the flatness of the placing plate and the existence of the through holes, the filter membrane is uniformly adsorbed, so that the deformation and warping of the filter membrane are avoided; the problems of particle morphology change, particle loss and incapability of identifying particle metal characteristics through polarized light possibly caused by using glass or transparent acrylic to flatten the filter membrane are avoided, and the accuracy and reliability of detection are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of cleanliness particle detection, in particular to a cleanliness particle detection filter membrane negative pressure leveling structure. Background Art

[0002] Cleanliness refers to the degree of contamination of specific parts of parts, assemblies, and complete machines by impurities. There are many methods for measuring cleanliness, including visual inspection, contact angle, fluorescence, gravimetric, and particle size counting. The particle size counting method is a new cleanliness testing method. Its basic principle is that the surface being tested and the contaminant particles have different light absorption or scattering rates. The impurity collection method is the same as the gravimetric method. After the filter membrane is dried, it is examined under light using a microscope. The contaminant particles are counted by size and number to obtain the solid particulate contamination results of the tested object part.

[0003] When scanning the filter membrane for cleanliness under a microscope, the deformation of the filter membrane (irregular warping after drying) will exceed the depth of field of the microscope objective, resulting in unclear imaging and affecting particle counting and size information statistics. Most existing technologies use glass or transparent acrylic to press on the upper surface of the filter membrane. Although this can make the filter membrane flat, it will cause problems such as particle morphology changes, particle loss, and the inability to identify the metal characteristics of particles through polarized light. Utility Model Content

[0004] The purpose of the utility model is to provide a negative pressure leveling structure for a cleanliness particle detection filter membrane to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a negative pressure leveling structure for a cleanliness particle detection filter membrane, comprising: a mounting seat, which is cylindrical; a negative pressure chamber, which is constructed on the mounting seat, and a card slot is constructed on the mounting seat, and a placement plate is clamped on the card slot, and the placement plate is constructed with multiple through holes distributed in an array; a sealing ring, which is placed on the top of the placement plate, and the outer peripheral side of the sealing ring is tightly fitted with the inner peripheral side of the card slot; a pipe, which is fixedly inserted into the bottom of the mounting seat, and one end of the pipe is connected to the negative pressure source.

[0006] As a further preferred embodiment of the present technical solution, two limiting grooves are constructed on the mounting seat, and two limiting plates are fixedly mounted on the outer surface of the placement plate in a symmetrical distribution, and the two limiting plates are respectively engaged with the two limiting grooves.

[0007] As a further preferred embodiment of the present technical solution, two fixing components are installed on the mounting seat, and the two fixing components are respectively used to fix the two ends of the sealing ring.

[0008] As a further preferred embodiment of the present technical solution, the fixing assembly includes a fixing cylinder fixedly installed on the outer peripheral side of the mounting seat, a connecting rod is slidably inserted on the fixing cylinder, a return spring is fixedly installed between the bottom of the inner wall of the fixing cylinder and the connecting rod, and a lower pressure plate is fixedly installed on the top of the connecting rod, and the lower pressure plate presses down the sealing ring.

[0009] As a further preferred embodiment of the present technical solution, a positioning groove is constructed on the sealing ring, and the lower pressure plate is engaged with the positioning groove.

[0010] As a further preferred embodiment of the present technical solution, a plurality of bifurcated tubes are fixedly inserted on the outer peripheral side of the pipeline, and one end of the plurality of bifurcated tubes is fixedly inserted on the bottom end of the mounting seat and extends into the negative pressure chamber.

[0011] As a further preferred embodiment of the present technical solution, an electromagnetic valve is provided on the pipeline, and the negative pressure source is a micro vacuum pump installed at the bottom of the mounting seat.

[0012] The utility model provides a negative pressure suction leveling structure for cleanliness particle detection filter membrane, which has the following beneficial effects:

[0013] When the negative pressure cavity is pumped into a negative pressure state by a negative pressure source, the filter membrane is adsorbed on the placement plate. Due to the flatness of the placement plate and the presence of through holes, the filter membrane is evenly adsorbed, thereby avoiding deformation and warping of the filter membrane, and avoiding the problems of particle morphology change, particle loss, and inability to identify particle metal characteristics through polarized light that may be caused by using glass or transparent acrylic to flatten the filter membrane, thereby improving the accuracy and reliability of detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a three-dimensional structural diagram of the utility model;

[0015] Figure 2 This utility model Figure 1 A side-view sectional perspective structural diagram;

[0016] Figure 3 This utility model Figure 1 A sectional three-dimensional structural diagram from the front;

[0017] Figure 4 This utility model Figure 1 A sectional three-dimensional structure diagram from a top view.

[0018] In the figure: 1. Mounting seat; 2. Negative pressure chamber; 3. Card slot; 4. Placement plate; 5. Sealing ring; 6. Pipe; 7. Limit plate; 8. Fixing assembly; 81. Fixing cylinder; 82. Connecting rod; 83. Return spring; 84. Lower pressure plate; 9. Bifurcated pipe; 10. Solenoid valve. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present invention.

[0020] The utility model provides a technical solution: Figure 1-4 As shown, in this embodiment, a negative pressure suction leveling structure for a cleanliness particle detection filter membrane includes: a mounting seat 1, which is cylindrical;

[0021] A negative pressure chamber 2 is constructed on the mounting base 1. The mounting base 1 is provided with a slot 3. A placement plate 4 is clamped on the slot 3. The placement plate 4 is provided with a plurality of through holes distributed in an array.

[0022] A sealing ring 5 is placed on the top of the placement plate 4, and the outer circumference of the sealing ring 5 is tightly fitted with the inner circumference of the card slot 3;

[0023] A pipe 6 is fixedly inserted into the bottom of the mounting base 1, and one end of the pipe 6 is connected to the negative pressure source. The filter membrane is placed on the placement plate 4 and located within the sealing ring 5. The inner ring diameter of the sealing ring 5 is the same as the diameter of the filter membrane, thereby limiting the filter membrane and preventing it from moving freely.

[0024] The working principle of the negative pressure flattening structure of the cleanliness particle detection filter membrane is to utilize the suction generated by the negative pressure chamber 2, which is connected to the negative pressure source through the pipe 6, to adsorb the filter membrane on the placement plate 4 to achieve the flattening of the filter membrane. The mounting seat 1 is designed to be cylindrical, and the negative pressure chamber 2 is constructed on the mounting seat 1. The placement plate 4 is clamped on the mounting seat 1 through the card slot 3. There are multiple through holes distributed on the placement plate 4. These through holes help to circulate air between the filter membrane and the placement plate 4. The sealing ring 5 is placed on the top of the placement plate 4, and its outer peripheral side is tightly fitted with the inner peripheral side of the card slot 3 to ensure the sealing of the negative pressure chamber 2. When the negative pressure chamber 2 is pumped into a negative pressure state by the negative pressure source, the filter membrane is adsorbed on the placement plate 4. Due to the flatness of the placement plate 4 and the presence of through holes, the filter membrane is evenly adsorbed, avoiding deformation and warping of the filter membrane. In this way, when performing cleanliness scans under a microscope, the filter membrane can remain flat, allowing the microscope objective lens to clearly image, accurately count particles and obtain particle size information. This structure avoids the problems of particle morphology changes, particle loss, and inability to identify particle metal characteristics through polarized light that may be caused by using glass or transparent acrylic to flatten the filter membrane, thereby improving the accuracy and reliability of detection.

[0025] like Figure 4 As shown, two limiting grooves are constructed on the mounting seat 1, and two limiting plates 7 are fixedly installed on the outer surface of the placement plate 4 in a symmetrical distribution. The two limiting plates 7 are respectively engaged with the two limiting grooves.

[0026] Two limit grooves are designed on the mounting seat 1, and two limit plates 7 are symmetrically distributed and fixedly installed on the outer surface of the placement plate 4. The two limit plates 7 are respectively engaged with the two limit grooves on the mounting seat, thereby ensuring that the position of the placement plate 4 on the mounting seat 1 is fixed and stable. This design not only enhances the stability of the structure, but also helps to ensure the flatness of the filter membrane on the placement plate 4, further optimizing the adsorption and flattening process of the filter membrane.

[0027] When the filter membrane is placed on the placement plate 4, the engagement between the limiting plate 7 and the limiting groove can prevent the placement plate 4 from being displaced or rotated under the action of negative pressure, ensuring that the filter membrane maintains the correct position during the entire detection process.

[0028] like Figure 3 As shown, two fixing assemblies 8 are installed on the mounting base 1, and the two fixing assemblies 8 are respectively used to fix the two ends of the sealing ring 5. The fixing assembly 8 includes a fixing cylinder 81 fixedly mounted on the outer peripheral side of the mounting base 1, and a connecting rod 82 is slidably inserted into the fixing cylinder 81. A return spring 83 is fixedly installed between the bottom of the inner wall of the fixing cylinder 81 and the connecting rod 82. A lower pressure plate 84 is fixedly mounted on the top of the connecting rod 82, and the lower pressure plate 84 presses down the sealing ring 5.

[0029] The fixing cylinder 81 is fixedly installed on the outer peripheral side of the mounting seat 1, providing a stable base for the fixing assembly 8, and the connecting rod 82 is slidably inserted in the fixing cylinder 81, allowing a certain degree of expansion and contraction to adapt to sealing rings 5 ​​of different thicknesses. The reset spring 83 is fixedly installed between the bottom of the inner wall of the fixing cylinder 81 and the connecting rod 82, providing elastic force to keep the connecting rod 82 and the lower pressure plate 84 in a certain position, ensuring that the sealing ring 5 is subjected to continuous pressure, and the lower pressure plate 84 is fixedly installed on the top of the connecting rod 82, which is used to directly press down the sealing ring 5 to ensure that it fits tightly. When the filter membrane is placed on the placement plate 4 and begins to absorb negative pressure, the fixing assembly 8 ensures that the sealing ring 5 is evenly and tightly pressed on the top of the placement plate 4 to prevent air leakage, thereby maintaining the negative pressure state of the negative pressure chamber 2. The presence of the reset spring 83 allows the fixing assembly 8 to automatically return to its original position when subjected to external force, maintaining continuous pressure on the sealing ring 5, and maintaining sealing even when the negative pressure changes or the filter membrane moves. The sealing ring 5 can be replaced with a sealing ring 5 of different inner diameters according to the size of the filter membrane to ensure the stable placement of the filter membrane without affecting the observation of the microscope.

[0030] like Figure 3 As shown, a positioning groove is constructed on the sealing ring 5, and the lower pressing plate 84 is engaged with the positioning groove.

[0031] The lower pressing plate 84 is engaged with the positioning groove to further stabilize the placement of the sealing ring 5.

[0032] like Figure 3As shown, a plurality of bifurcated tubes 9 are fixedly inserted on the outer peripheral side of the pipeline 6 , and one end of the plurality of bifurcated tubes 9 is fixedly inserted on the bottom end of the mounting seat 1 and extends into the negative pressure chamber 2 .

[0033] A plurality of bifurcated tubes 9 are fixedly inserted on the outer peripheral side of the pipe 6. The design purpose of these bifurcated tubes 9 is to evenly distribute the negative pressure to each area of ​​the negative pressure chamber 2, thereby avoiding uneven adsorption of the filter membrane due to uneven distribution of negative pressure, and ensuring that the negative pressure acts directly and quickly on the filter membrane, thereby improving the efficiency and effect of the filter membrane adsorption.

[0034] like Figure 3 As shown, an electromagnetic valve 10 is provided on the pipeline 6 , and the negative pressure source is a micro vacuum pump installed at the bottom of the mounting base 1 .

[0035] A solenoid valve 10 is provided on the pipe 6 to control the airflow between the negative pressure source and the negative pressure chamber 2. The solenoid valve 10 can be precisely opened or closed, thereby controlling the pressure level within the negative pressure chamber 2. When the filter membrane needs to be leveled, the solenoid valve 10 opens, allowing the negative pressure generated by the micro vacuum pump to enter the negative pressure chamber 2, causing the filter membrane to be adsorbed on the placement plate 4. When the leveling operation is completed, the solenoid valve 10 closes, cutting off the negative pressure, and the filter membrane can be easily removed.

[0036] The utility model provides a tire curing bladder production transfer trolley, the specific working principle is as follows:

[0037] The working principle of the negative pressure flattening structure of the cleanliness particle detection filter membrane is to utilize the suction generated by the negative pressure chamber 2, which is connected to the negative pressure source through the pipe 6, to adsorb the filter membrane on the placement plate 4 to achieve the flattening of the filter membrane. The mounting seat 1 is designed to be cylindrical, and the negative pressure chamber 2 is constructed on the mounting seat 1. The placement plate 4 is clamped on the mounting seat 1 through the card slot 3. There are multiple through holes distributed on the placement plate 4. These through holes help to circulate air between the filter membrane and the placement plate 4. The sealing ring 5 is placed on the top of the placement plate 4, and its outer peripheral side is tightly fitted with the inner peripheral side of the card slot 3 to ensure the sealing of the negative pressure chamber 2. When the negative pressure chamber 2 is pumped into a negative pressure state by the negative pressure source, the filter membrane is adsorbed on the placement plate 4. Due to the flatness of the placement plate 4 and the presence of through holes, the filter membrane is evenly adsorbed, avoiding deformation and warping of the filter membrane. When the filter membrane is placed on the placement plate 4, the clamping action of the limit plate 7 and the limit groove can prevent the placement plate 4 from being displaced or rotated under the action of negative pressure, ensuring that the filter membrane maintains the correct position during the entire detection process. When the filter membrane is placed on the placement plate 4 and begins to be flattened by negative pressure, the fixing assembly 8 ensures that the sealing ring 5 is evenly and tightly pressed on the top of the placement plate 4 to prevent air leakage, thereby maintaining the negative pressure state of the negative pressure chamber 2. The presence of the reset spring 83 allows the fixing assembly 8 to automatically return to its original position when subjected to external force, maintaining the continuous pressure of the sealing ring 5, and maintaining the sealing even when the negative pressure changes or the filter membrane moves. When the filter membrane needs to be flattened, the electromagnetic valve 10 opens, allowing the negative pressure generated by the micro vacuum pump to enter the negative pressure chamber 2, so that the filter membrane is adsorbed on the placement plate 4. When the flattening operation is completed, the electromagnetic valve 10 closes, cutting off the negative pressure, and the filter membrane can be easily removed.

[0038] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A negative pressure suction leveling structure for cleanliness particle detection filter membrane, characterized in that: include: A mounting seat (1), wherein the mounting seat (1) is cylindrical; A negative pressure chamber (2), the negative pressure chamber (2) being constructed on the mounting seat (1), the mounting seat (1) being provided with a slot (3), a placement plate (4) being clamped on the slot (3), and the placement plate (4) being provided with a plurality of through holes distributed in an array; A sealing ring (5), the sealing ring (5) is placed on the top of the placement plate (4), and the outer peripheral side of the sealing ring (5) is tightly fitted with the inner peripheral side of the card slot (3); A pipe (6), wherein the pipe (6) is fixedly inserted into the bottom of the mounting seat (1), and one end of the pipe (6) is connected to a negative pressure source.

2. The negative pressure leveling structure for cleanliness particle detection filter membrane according to claim 1, characterized in that: Two limiting grooves are constructed on the mounting seat (1); two limiting plates (7) are fixedly mounted on the outer surface of the placement plate (4) in a symmetrical distribution; the two limiting plates (7) are respectively engaged with the two limiting grooves.

3. The negative pressure leveling structure for cleanliness particle detection filter membrane according to claim 1, characterized in that: Two fixing assemblies (8) are installed on the mounting seat (1), and the two fixing assemblies (8) are respectively used to fix the two ends of the sealing ring (5).

4. The negative pressure leveling structure for cleanliness particle detection filter membrane according to claim 3, characterized in that: The fixing assembly (8) includes a fixing cylinder (81) fixedly mounted on the outer peripheral side of the mounting seat (1), a connecting rod (82) is slidably inserted into the fixing cylinder (81), a return spring (83) is fixedly mounted between the bottom of the inner wall of the fixing cylinder (81) and the connecting rod (82), and a lower pressure plate (84) is fixedly mounted on the top end of the connecting rod (82), and the lower pressure plate (84) presses down the sealing ring (5).

5. The negative pressure leveling structure for cleanliness particle detection filter membrane according to claim 4, characterized in that: A positioning groove is formed on the sealing ring (5), and the lower pressing plate (84) is engaged with the positioning groove.

6. The negative pressure leveling structure for cleanliness particle detection filter membrane according to claim 1, characterized in that: A plurality of bifurcated tubes (9) are fixedly inserted on the outer peripheral side of the pipeline (6), and one end of the plurality of bifurcated tubes (9) is fixedly inserted at the bottom end of the mounting seat (1) and extends into the negative pressure chamber (2).

7. The negative pressure leveling structure for cleanliness particle detection filter membrane according to claim 1, characterized in that: The pipeline (6) is provided with an electromagnetic valve (10), and the negative pressure source is a micro vacuum pump installed at the bottom of the mounting seat (1).

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