CN114216630B - Air tightness detection device for filter cavity - Google Patents
Air tightness detection device for filter cavity Download PDFInfo
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- CN114216630B CN114216630B CN202210149619.3A CN202210149619A CN114216630B CN 114216630 B CN114216630 B CN 114216630B CN 202210149619 A CN202210149619 A CN 202210149619A CN 114216630 B CN114216630 B CN 114216630B
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- 238000001514 detection method Methods 0.000 title claims abstract description 40
- 230000008093 supporting effect Effects 0.000 claims abstract description 76
- 239000000463 material Substances 0.000 claims abstract description 27
- 238000007873 sieving Methods 0.000 claims abstract description 26
- 238000012216 screening Methods 0.000 claims abstract description 23
- 210000001503 joint Anatomy 0.000 claims description 48
- 230000007246 mechanism Effects 0.000 claims description 6
- 238000007789 sealing Methods 0.000 claims description 6
- 230000000717 retained effect Effects 0.000 abstract 1
- 239000010687 lubricating oil Substances 0.000 description 9
- 238000003032 molecular docking Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 230000000149 penetrating effect Effects 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000007723 die pressing method Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
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- General Physics & Mathematics (AREA)
- Examining Or Testing Airtightness (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
Abstract
The invention relates to the technical field of filter detection, in particular to a gas tightness detection device for a filter cavity, which comprises: a support base; the gas hood is connected to the support column in a sliding mode, a pressurizing opening is formed in the top of the gas hood, and an overlapping area is formed between the gas hood and the support base; the pressurizing part is arranged at the top of the gas hood and is suitable for pressurizing the inside of the gas hood through the pressurizing port; the screening part is arranged in the supporting base and can be communicated with the pressurizing part; when the overlapping area of the gas hood and the supporting base is completely overlapped, the gas hood and the supporting base are relatively sealed; when the gas hood partially overlaps with the overlapping region of the supporting base, the pressurizing part can push the filter cavity through the material sieving part so that the filter cavity is separated from the supporting base, and the filter cavity can be judged whether to be retained on the original position of the supporting base or not, so that a worker can accurately sieve the filter cavity without applying attention.
Description
Technical Field
The invention relates to the technical field of filter detection, in particular to an air tightness detection device for a filter cavity.
Background
Chinese patent, application number CN201921274271.0, application date 2019.08.07, publication number CN210071243U, and publication number 2020.02.14, provides a filter cabinet airtightness detection device, which comprises a support base, wherein the top of the support base is fixedly connected with a gas source box through a first support rod, the top of the gas source box is fixedly connected with a top plate through a second support rod, the bottom of the top plate is fixedly connected with a hydraulic cylinder, the inside of the hydraulic cylinder is slidably connected with a hydraulic telescopic rod, the hydraulic telescopic rod penetrates through the gas source box, the bottom of the hydraulic telescopic rod is fixedly connected with a connecting block, the connecting block is fixedly connected with an upper die pressing plate through a first connecting bolt, an inflation tube is arranged in the connecting block, the top of the inflation tube is connected with the gas source box through a connecting tube, the right side of the support base is provided with a precision instrument leakage detector, and the precision instrument leakage detector is connected with the gas source box through a data line, the whole device is convenient to seal the filter, the air tightness detection effect is better, the mold is convenient to replace to detect the filters with different sizes and models, and the detection cost is reduced.
However, although the airtightness detection device detects the airtightness of the filter by controlling the elevation of the air source box to seal the filter and ensure the linearity of the sliding of the air source box by the air source box sliding along the second support rod, the frictional resistance between the air source box and the second support rod becomes large after a long time of use, that is, after a long time of friction between the air source box and the second support rod, and the sliding of the air source box is hindered.
In order to solve the above problems, a new air tightness detecting device for a filter cavity needs to be designed.
Disclosure of Invention
The invention aims to provide a gas tightness detection device for a filter cavity.
In order to solve the above technical problem, the present invention provides an air tightness detecting device for a filter cavity, comprising: the supporting base is used for placing the filter cavity, and supporting columns are arranged on two sides of the top end face of the supporting base; the gas hood is connected to the supporting column in a sliding mode, a pressurizing opening is formed in the top of the gas hood, and an overlapping area is formed between the gas hood and the supporting base; the pressurizing part is arranged at the top of the gas hood and is suitable for pressurizing the inside of the gas hood through the pressurizing port; the screening part is arranged in the supporting base and can be communicated with the pressurizing part; wherein the gas cover is sealed relative to the support base when the gas cover completely overlaps the overlapping region of the support base; when the gas hood is partially overlapped with the overlapped area of the supporting base, the pressurizing part can push the filter cavity through the screening part so as to separate the filter cavity from the supporting base.
Furthermore, a plurality of positioning holes are formed in the supporting base, and the positioning holes correspond to the support legs at the bottom of the cavity of the filter one by one; wherein the filter cavity is limited on each positioning hole.
Furthermore, a screening port is formed in the top of the gas hood, and a butt-joint outlet is formed in the overlapping area of the gas hood; the supporting base is provided with a butt joint inlet in the overlapping area; the screening part comprises a first screening channel for communicating the butt joint inlet with the positioning hole and a second screening channel for communicating the screening port with the butt joint outlet; wherein the docking inlet is staggered from the docking outlet when the gas hood completely overlaps the overlap region of the support base; when the gas hood is partially overlapped with the overlapping area of the support base, the butt joint inlet is communicated with the butt joint outlet.
Further, the support base has a step, the step is matched with the gas hood to form the overlapping area; the butt joint inlet is formed in the side wall of the step; the positioning hole penetrates through the step.
Furthermore, a detection port is formed through the support base and the step, and each positioning hole is positioned on the outer ring of the detection port; wherein the air pressure leaked from the filter cavity is discharged through the detection port.
Furthermore, a top plate is connected to the inside of the air hood in a sliding manner, and the top plate is connected with the inner top wall of the air hood through a plurality of rebound springs; the top plate penetrates through the gas hood to be linked with the pressurizing part; when the butt joint inlet and the butt joint outlet are staggered, the filter cavity pushes the top plate to compress the rebound spring so as to enable the pressurization part to be communicated with the pressurization port; when the butt joint inlet is communicated with the butt joint outlet, the rebound spring rebounds to enable the pressurization part to be communicated with the material sieving opening.
Further, the distance between the top plate and the inner top wall of the gas hood is equal to the height of the step.
Furthermore, a sealing groove is formed in the supporting base and positioned on the outer ring of the step; wherein the gas hood is insertable into the sealing groove.
Further, the pressurizing part comprises a pressurizing pump and pressurizing mechanisms positioned on two sides of the pressurizing pump; each pressurizing mechanism comprises a pressurizing bag communicated with the pressurizing pump, a pressurizing pipeline extends out of the pressurizing bag, and an air outlet is formed in one end, far away from the pressurizing bag, of the pressurizing pipeline; and the top plate is linked with the pressurizing bag; when the butt joint inlet and the butt joint outlet are staggered, the air outlet is communicated with the pressurizing port; when the butt joint inlet is communicated with the butt joint outlet, the gas outlet is communicated with the material sieving port.
Furthermore, the top of the air hood is also provided with a guide groove which is obliquely arranged, and the lower part of the guide groove is positioned at the connecting part of the air hood and the support column; when the air hood is separated from the supporting base, the air outlet faces the diversion trench.
The air tightness detection device for the cavity of the filter has the advantages that when the air tightness detection device is used for detecting the cavity of the filter, the air cover is completely overlapped with the overlapped area of the supporting base, the air cover and the supporting base are relatively sealed, and the pressurizing part pressurizes the inside of the air cover; after the detection is finished, when the gas hood moves to the state that the gas hood is partially overlapped with the overlapped area of the supporting base, the pressurizing part is communicated with the material sieving part, and if the air tightness of the filter cavity is qualified, the pressurizing part can push the filter cavity through the material sieving part so as to separate the filter cavity from the supporting base; if the air tightness of the filter cavity is unqualified, the pressurizing part is decompressed, the air pressure reserved in the pressurizing part is not enough to push the filter cavity to be separated from the supporting base, the unqualified filter cavity can be reserved on the supporting base, a worker does not need to read out whether the filter cavity is qualified on a machine, the filter cavity can be judged by judging whether the filter cavity is reserved on the original position of the supporting base or not, and therefore the worker can accurately screen the filter cavity without applying attention.
Drawings
The invention is further illustrated with reference to the following figures and examples.
Fig. 1 is a first perspective view of a preferred embodiment of an air-tightness detecting device for a filter chamber according to the present invention;
fig. 2 is a second perspective view of a preferred embodiment of the air tightness detecting device for filter cavities of the present invention;
FIG. 3 is a perspective view of a preferred embodiment of the pressurization section of the present invention;
fig. 4 is a perspective view of a preferred embodiment of the top plate of the present invention.
In the figure: a support base 1; a support column 11; a positioning hole 12; a butt inlet 13; a step 14; a detection port 15; a seal groove 16; a gas hood 2; a pressurizing port 21; a screen port 22; a docking outlet 23; a diversion trench 24; a pressurizing part 3; a pressure pump 31; a pressurizing bag 32; a pressurizing line 33; an air outlet 34; a pressurizing frame 35; a push plate 351; a bracket 36; a head 37; a support cylinder 38; a material sieving part 4; a first sieve channel 41; a second screening channel 42; a top plate 5; a rebound spring 51; an extension plate 52.
Detailed Description
The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic views illustrating only the basic structure of the present invention in a schematic manner, and thus show only the constitution related to the present invention.
As shown in fig. 1 to 4, an air tightness detecting device for a filter cavity includes: the filter comprises a supporting base 1, wherein the supporting base 1 is used for placing a filter cavity, supporting columns 11 are arranged on two sides of the top end face of the supporting base 1, the supporting columns 11 are guide columns, an air hood 2 is connected onto the supporting columns 11 in a sliding mode, specifically, an air cylinder can be arranged above the supporting base 1, the air hood 2 is fixed at the movable end of the air cylinder, the air hood 2 is driven by the air cylinder to slide along the supporting columns 11, the supporting columns 11 play a role in guiding the sliding of the air hood 2, so that the air hood 2 is in butt joint with the supporting base 1, meanwhile, a space suitable for placing the filter cavity is formed between the air hood 2 and the supporting base 1, in the butt joint process of the air hood 2 and the supporting base 1, an overlapping area is formed between the air hood 2 and the supporting base 1, and the overlapping area enables the air hood 2 and the supporting base 1 to be sealed relatively; after the gas hood 2 is abutted to the supporting base 1, in order to detect the air tightness of the filter cavity, air pressure needs to be added into the gas hood 2, specifically, a pressurizing port 21 is formed in the top of the gas hood 2, a pressurizing part 3 is arranged on the top of the gas hood 2, the pressurizing part 3 penetrates through the pressurizing port 21 to pressurize the inside of the gas hood 2, and then the air tightness of the filter cavity is detected, specifically, after the pressurizing part 3 stops pressurizing the inside of the gas hood 2, if the pressure in the gas hood 2 is stabilized, the air tightness of the filter cavity is good, and if the air pressure in the gas hood 2 is reduced, the air tightness of the filter cavity is poor.
It should be noted that, as to whether the air tightness of the filter cavity meets the requirement, the judgment needs to be carried out by a machine, and the filter cavity is manually taken down from the supporting base 1 after the air tightness of the machine reaches the standard, so the operation is complex, meanwhile, after workers are tired after working for a long time, the operation can be unconsciously carried out, errors are easy to occur, and in order to solve the problems, a screening part 4 is additionally arranged in the supporting base 1, the screening part 4 is positioned below the cavity of the filter, and the screening part 4 can be communicated with the pressurizing part 3, when the pressurizing part 3 pressurizes the inside, the material sieving part 4 is not communicated with the pressurizing part 3, and when the gas hood 2 and the supporting base 1 are relatively displaced for a distance, when the air hood 2 is not completely separated from the supporting base 1, the material sieving part 4 is communicated with the pressurizing part 3, and the material sieving part 4 can be pressurized by the stable air pressure in the pressurizing part 3; during detection, the overlapping area of the gas hood 2 and the supporting base 1 is completely overlapped, the gas hood 2 and the supporting base 1 are sealed relatively, and the pressurizing part 3 pressurizes the inside of the gas hood 2; after the detection is finished, when the gas hood 2 moves to the state that the gas hood 2 is partially overlapped with the overlapped area of the support base 1, the pressurizing part 3 is communicated with the material sieving part 4, if the air tightness of the filter cavity is qualified, the pressurizing part 3 can push the filter cavity through the material sieving part 4 so as to separate the filter cavity from the support base 1; if the air tightness of the filter cavity is unqualified, the pressurizing part 3 is decompressed, the air pressure reserved in the pressurizing part 3 is not enough to push the filter cavity to be separated from the supporting base 1, the unqualified filter cavity can be reserved on the supporting base 1, a worker does not need to read out whether the filter cavity is qualified on a machine, the filter cavity can be judged by judging whether the filter cavity is reserved on the original position of the supporting base 1, and therefore the worker can accurately screen the filter cavity without paying attention.
In order to position the filter cavity on the support base 1, a plurality of positioning holes 12 are formed in the support base 1, and the positioning holes 12 correspond to the support legs at the bottom of the filter cavity one by one; the filter cavity is limited on each positioning hole 12 and then limited on the supporting base 1, so that the stability and accuracy of air tightness detection are ensured, and the situation that pressure is relieved between the air hood 2 and the supporting base 1 due to shaking between the filter cavity and the supporting base 1 is avoided.
In order to enable the material sieving part 4 to be communicated with the pressurizing part 3, a sieving port 22 is further formed in the top of the gas hood 2, and a butt-joint outlet 23 is formed in the overlapping area of the gas hood 2; a butt joint inlet 13 is formed in the overlapping area of the supporting base 1; the material sieving part 4 comprises a first material sieving channel 41 for communicating the butt joint inlet 13 with the positioning hole 12 and a second material sieving channel 42 for communicating the material sieving port 22 with the butt joint outlet 23, and after the pressurizing part 3 is communicated with the material sieving part 4, the air pressure in the pressurizing part 3 sequentially passes through the material sieving port 22, the second material sieving channel 42, the butt joint outlet 23, the butt joint inlet 13, the first material sieving channel 41 and the positioning hole 12 to the bottom of the cavity of the filter; when the overlapping part of the gas hood 2 and the support base 1 is the whole overlapping area, the docking inlet 13 and the docking outlet 23 are staggered, so that the gas hood 2 and the support base 1 are sealed relatively; when the overlapping part of the gas hood 2 and the support base 1 is a part of the overlapping area, the butt joint inlet 13 is communicated with the butt joint outlet 23.
Specifically, the structure of the overlapping area is that a step 14 is arranged on the supporting base 1, and the step 14 is matched with the gas hood 2 to form the overlapping area; the butt joint inlet 13 is formed in the side wall of the step 14; the locating hole 12 runs through step 14, the inside wall of gas hood 2 and the laminating of the outside wall of step 14 mutually, and gas hood 2 can the lock outside step 14, through the setting of step 14, further improves gas hood 2 and supports the sealed effect between the base 1 to guarantee the gas tightness detection accuracy to the wave filter cavity.
In order to realize the airtight detection of the filter cavity, a detection port 15 is formed by penetrating through the support base 1 and the step 14, and each positioning hole 12 is positioned on the outer ring of the detection port 15, so that the pressure relief from the positioning hole 12 is avoided in the detection process; in the detection process, the air pressure generated by the pressurizing part 3 passes through the gap on the filter cavity and is discharged from the detection port 15, and the air pressure in the pressurizing part 3 leaks, so that the residual air pressure cannot jack up the filter cavity after the butt joint inlet 13 corresponds to the butt joint outlet 23.
In order to switch the communication with the pressurizing port 21 or the screening port 22 in the pressurizing part 3, a top plate 5 is connected in the gas hood 2 in a sliding manner, the top plate 5 is connected with the inner top wall of the gas hood 2 through a plurality of rebound springs 51, the height of the inner cavity of the gas hood 2 is greater than the height of the filter cavity, the height of the height is the sum of the thickness of the top plate 5 and the height of the rebound springs 51 after compression, when the gas hood 2 is buckled on the step 14, the top of the filter cavity pushes the top plate 5 to compress the rebound springs 51, and meanwhile, after the gas hood 2 is completely separated from the supporting base 1, the rebound springs 51 rebound to enable the top plate 5 to return to the initial position; the top plate 5 penetrates through the gas hood 2 and is linked with the pressurizing part 3; when the butt joint inlet 13 and the butt joint outlet 23 are dislocated, the filter cavity pushes the top plate 5 to compress the rebound spring 51, so that the pressurizing part 3 is communicated with the pressurizing port 21; when the butt joint inlet 13 is communicated with the butt joint outlet 23, the rebound spring 51 rebounds to enable the pressurization part 3 to be communicated with the screening opening 22, the pressurization part 3 is switched to be communicated with the pressurization opening 21 or the screening opening 22 through buckling and opening of the air cover 2, automatic switching is achieved, operation is simple, and additional control is not needed.
Optionally, the distance between the top plate 5 and the inner top wall of the gas hood 2 is equal to the height of the step 14, and when the gas hood 2 is buckled outside the step 14, the filter cavity pushes the top plate 5 to be attached to the inner top wall of the top plate 5 and the gas hood 2, so that the integrity between the support base 1, the filter cavity, the top plate 5 and the gas hood 2 is further improved, and the air tightness detection accuracy of the filter cavity is ensured.
In order to further improve the relative sealing effect between the gas hood 2 and the support base 1, a sealing groove 16 is further formed in the support base 1 at the outer ring of the step 14; the gas hood 2 can be inserted into the sealing groove 16, so that the condition that the gas pressure in the gas hood 2 leaks from the joint of the gas hood 2 and the support base 1 is avoided.
The structure of the pressurizing part 3 is as follows, the pressurizing part 3 comprises a pressurizing pump 31 and pressurizing mechanisms positioned at two sides of the pressurizing pump 31, and an air source is provided by the pressurizing pump 31; each pressurizing mechanism comprises a pressurizing bag 32 communicated with the pressurizing pump 31, a pressurizing pipeline 33 extends out of the pressurizing bag 32, an air outlet 34 is formed in one end, far away from the pressurizing bag 32, of the pressurizing pipeline 33, specifically, the pressurizing pipeline 33 extends out of the side wall of the pressurizing bag 32, the whole pressurizing pipeline 33 is a bent pipe and consists of a straight line section and an oblique line section, and the straight line section is fixed with the pressurizing bag 32; the top plate 5 is linked with the pressurizing bag 32, and particularly, the pressurizing bag 32 rotates in the process that the top plate 5 is pushed and lifted by the filter cavity; during the process of ventilating the pressurizing bag 32 by the pressurizing pump 31, the pressurizing bag 32 expands to generate positive air pressure in the pressurizing bag 32, so that the air can be ventilated into the air hood 2, that is, the air pressure for detecting the air tightness of the filter cavity is controlled by the deformation degree of the pressurizing bag 32; when the butt joint inlet 13 and the butt joint outlet 23 are dislocated, the top plate 5 pushes the pressurizing bag 32 to rotate until the air outlet 34 is communicated with the pressurizing port 21; when the docking inlet 13 is communicated with the docking outlet 23, the pressurizing bag 32 rotates until the air outlet 34 is communicated with the sieve opening 22.
The amount of air pressure required for each test is provided by the amount of fixed deformation of the pressurized bladder 32, reducing machine and human involvement.
It should be noted that, in order to ensure the smoothness of the sliding of the gas hood 2 along the supporting column 11, lubricating oil is usually applied to the joint between the supporting column 11 and the gas hood 2, and in the using process, the lubricating oil splashes to the top of the gas hood 2 or spreads along the top of the gas hood 2, in order to solve the above problems, an obliquely arranged guiding groove 24 is further formed in the top of the gas hood 2, and the lower part of the guiding groove 24 is located at the joint between the gas hood 2 and the supporting column 11, so that the guiding effect is exerted on the overflowed lubricating oil by the arrangement of the guiding groove 24, the overflowed lubricating oil is guided to flow back to the contact between the gas hood 2 and the supporting column 11, thereby reducing the loss of the lubricating oil and enabling the lubricating oil to be recycled; when the gas hood 2 is separated from the support base 1, the gas outlet 34 faces the flow guide groove 24, that is, when the gas hood 2 is separated from the support base 1, the gas pressure in the pressurizing bag 32 acts as a thrust to the backflow of the lubricating oil in the flow guide groove 24.
In this embodiment, through the setting of guiding gutter 24, can play the effect of scraping the material to support column 11, avoid being difficult to carry out the problem of cleaning to support column 11 after the lubricating oil esterifies, specifically, the lubricating oil that is esterified all can be collected in guiding gutter 24, as long as regularly clear up guiding gutter 24.
In this embodiment, the air outlet 34 has three stations, namely, an alignment guiding groove 24, an alignment pressurizing opening 21 and an alignment screening opening 22, and the pressurizing bag 32 itself has flexibility and expands, so that it does not have a certain supporting property to support the rotation thereof, in order to solve the above problem, a scheme can be adopted in which the pressurizing bag 32 is hooped on a pressurizing frame 35, and the pressurizing frame 35 is rotatably connected to the top of the air hood 2, and further the pressurizing frame 35 is driven by the top plate 5 to rotate so as to drive the pressurizing bag 32 to rotate, specifically, the pressurizing frame 35 is rotated by a rotating shaft, and a torsion spring is sleeved on the rotating shaft, so that the pressurizing frame 35 can be restored after rotating.
In order to realize the rotation of the top plate 5 in linkage with the pressurizing frame 35, a push plate 351 is arranged on one side of the pressurizing frame 35, an extension plate 52 penetrating through the air hood 2 is arranged on the top plate 5, the extension plate 52 extends to the bottom of the push plate 351, and when the top plate 5 is jacked up by the filter cavity, the extension plate 52 pushes the push plate 351 to drive the pressurizing frame 35 to rotate, so that the air outlet 34 switches stations.
It should be noted that when the air outlet 34 is aligned with the pressure port 21 and the material sieving port 22, the pressure pipeline 33 is required to be attached to the air hood 2, and when the air outlet 34 is aligned with the diversion trench 24, the pressure pipeline 33 may not be in contact with the air hood 2, in order to enable the pressure pipeline 33 to be switched between attachment to the pressure port 21 and the material sieving port 22, a bracket 36 may extend from a side wall of the pressure bag 32, a support head 37 is hinged to an end of the bracket 36, a support barrel 38 is sleeved in the support head 37, and the pressure pipeline 33 passes through the bracket 36 and the support barrel 38 in sequence; when the extension plate 52 pushes the push plate 351, the pressurizing frame 35 rotates until the bottom of the support cylinder 38 is attached to the air hood 2, and as the pressurizing frame 35 continues to rotate, the bottom of the support cylinder 38 keeps in contact with the air hood 2, and meanwhile, the support cylinder 38 is lifted upwards along the support head 37, so that the air pressure in the pressurizing bag 32 can enter the pressurizing opening 21 or the material sieving opening 22.
In light of the foregoing description of the preferred embodiment of the present invention, it is to be understood that various changes and modifications may be made by one skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (8)
1. The utility model provides a filter is gas tightness detection device for cavity which characterized in that includes:
the supporting base is used for placing the filter cavity, and supporting columns are arranged on two sides of the top end face of the supporting base;
the gas hood is connected to the supporting column in a sliding mode, a pressurizing opening is formed in the top of the gas hood, and an overlapping area is formed between the gas hood and the supporting base;
the pressurizing part is arranged at the top of the gas hood and is suitable for pressurizing the inside of the gas hood through the pressurizing port; and
the material screening part is arranged in the supporting base and can be communicated with the pressurizing part; wherein
When the overlapping area of the air hood and the supporting base is completely overlapped, the air hood and the supporting base are relatively sealed;
when the gas hood is partially overlapped with the overlapped area of the supporting base, the pressurizing part can push the filter cavity through the screening part so as to separate the filter cavity from the supporting base;
a plurality of positioning holes are formed in the supporting base, and the positioning holes correspond to the support legs at the bottom of the filter cavity one by one; wherein
The filter cavity is limited on each positioning hole;
the top of the gas hood is also provided with a screening port, and the gas hood is positioned in the overlapping area and is provided with a butt-joint outlet;
the supporting base is provided with a butt joint inlet in the overlapping area;
the screening part comprises a first screening channel for communicating the butt joint inlet with the positioning hole and a second screening channel for communicating the screening port with the butt joint outlet; wherein
When the gas hood is completely overlapped with the overlapping area of the support base, the butt joint inlet is staggered with the butt joint outlet;
when the gas hood is partially overlapped with the overlapping area of the support base, the butt joint inlet is communicated with the butt joint outlet.
2. The airtightness detection apparatus for filter chamber according to claim 1,
the supporting base is provided with a step which is matched with the air hood to form the overlapping area; and
the butt joint inlet is formed in the side wall of the step;
the positioning hole penetrates through the step.
3. The airtightness detection apparatus for a filter chamber according to claim 2,
a detection port is formed through the supporting base and the step, and each positioning hole is positioned on the outer ring of the detection port; wherein
And the air pressure leaked from the cavity of the filter is exhausted through the detection port.
4. The airtightness detection apparatus for a filter chamber according to claim 3,
a top plate is connected to the inside of the gas hood in a sliding manner, and the top plate is connected with the inner top wall of the gas hood through a plurality of rebound springs;
the top plate penetrates through the gas hood to be linked with the pressurizing part; wherein
When the butt joint inlet and the butt joint outlet are staggered, the filter cavity pushes the top plate to compress the rebound spring so as to enable the pressurization part to be communicated with the pressurization port;
when the butt joint inlet is communicated with the butt joint outlet, the rebound spring rebounds to enable the pressurization part to be communicated with the material sieving opening.
5. The airtightness detection apparatus for a filter chamber according to claim 4,
the distance between the top plate and the inner top wall of the gas hood is equal to the height of the step.
6. The airtightness detection apparatus for a filter chamber according to claim 5,
a sealing groove is further formed in the supporting base and positioned on the outer ring of the step; wherein
The gas hood is insertable into the seal groove.
7. The airtightness detection apparatus for a filter chamber according to claim 6,
the pressurizing part comprises a pressurizing pump and pressurizing mechanisms positioned on two sides of the pressurizing pump;
each pressurizing mechanism comprises a pressurizing bag communicated with the pressurizing pump, a pressurizing pipeline extends out of the pressurizing bag, and an air outlet is formed in one end, far away from the pressurizing bag, of the pressurizing pipeline; and
the top plate is linked with the pressurizing bag; wherein
When the butt joint inlet and the butt joint outlet are staggered, the air outlet is communicated with the pressurizing port;
when the butt joint inlet is communicated with the butt joint outlet, the gas outlet is communicated with the material sieving port.
8. The airtightness detection apparatus for a filter chamber according to claim 7,
the top of the gas hood is also provided with a guide groove which is obliquely arranged, and the lower part of the guide groove is positioned at the connecting part of the gas hood and the support column; wherein
When the gas hood is separated from the supporting base, the gas outlet faces the diversion trench.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210149619.3A CN114216630B (en) | 2022-02-18 | 2022-02-18 | Air tightness detection device for filter cavity |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210149619.3A CN114216630B (en) | 2022-02-18 | 2022-02-18 | Air tightness detection device for filter cavity |
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| CN114216630A CN114216630A (en) | 2022-03-22 |
| CN114216630B true CN114216630B (en) | 2022-04-29 |
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Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104596710A (en) * | 2014-12-29 | 2015-05-06 | 宁波华瓷通信技术有限公司 | Gas tightness test equipment |
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