CN114199477B - Mechanical device for detecting air tightness of exhaust valve and use method - Google Patents
Mechanical device for detecting air tightness of exhaust valve and use method Download PDFInfo
- Publication number
- CN114199477B CN114199477B CN202111495475.9A CN202111495475A CN114199477B CN 114199477 B CN114199477 B CN 114199477B CN 202111495475 A CN202111495475 A CN 202111495475A CN 114199477 B CN114199477 B CN 114199477B
- Authority
- CN
- China
- Prior art keywords
- air
- air outlet
- exhaust valve
- air inlet
- pressure gauge
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000000034 method Methods 0.000 title claims abstract description 13
- 238000012360 testing method Methods 0.000 claims abstract description 23
- 238000001514 detection method Methods 0.000 claims abstract description 17
- 238000007789 sealing Methods 0.000 claims description 6
- 230000005484 gravity Effects 0.000 claims description 5
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 238000013461 design Methods 0.000 abstract description 8
- 238000005452 bending Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 239000000446 fuel Substances 0.000 description 2
- 238000002791 soaking Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000011002 quantification Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- 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
- G01M3/28—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 for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds
- G01M3/2876—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 for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds for valves
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Examining Or Testing Airtightness (AREA)
Abstract
The invention discloses a mechanical device for detecting the air tightness of an exhaust valve and a use method thereof. The device comprises an air outlet end pressure gauge, an air outlet end pipeline, a fixed block, a sliding block, an air inlet end pressure gauge, an air inlet end pipeline, a dowel bar, a connecting plate, an adapter plate, a bottom plate and an air cylinder; during the test, the sliding block and the fixed block fix the tested exhaust valve, and gas sequentially passes through the air inlet end pressure gauge, the air inlet end pipeline, the sliding block, the tested exhaust valve, the fixed block, the air outlet end pipeline and the air outlet end pressure gauge to form a complete detection air path, and whether the tightness of the exhaust valve is in a reasonable range is detected by detecting the change of the pressure of the air path after passing through the tested exhaust valve by using the pressure gauge. The design has the advantages of simple operation, strong universality and low cost, and can conveniently and rapidly meet experimental requirements by observing the pressure gauge difference value of the air inlet end and the air outlet end and checking the air tightness of the tested exhaust valve, wherein the one-time loading and unloading time is less than or equal to 50 s.
Description
Technical Field
The invention relates to the field of exhaust valve detection, in particular to a mechanical device for exhaust valve air tightness detection and a use method thereof.
Background
In general, the air tightness of the exhaust valve is various, the traditional air tightness test mode is a water soaking method, the water depth and the soaking time are used for corresponding to the IP waterproof grade test of each level, and whether the exhaust valve has water inflow or not is tested as a judging standard, but the method is obviously unsuitable for electronic products. Most exhaust valve air tightness detection modes have various problems such as low air tightness leakage detection efficiency, repeated disassembly and assembly, verification, more structural parts, difficult assembly, insufficient data quantification, incapability of meeting test requirements and operation safety and the like.
In patent document CN201620132720, a leak detection device for fuel cell polar plate is disclosed, including quick fastener and leak detection mould, quick fastener includes the fixed plate, the clamp plate, lower fixed plate and cylinder, go up the fixed plate and pass through four guide rail post and lower fixed plate fixed connection that set up four angles departments at last fixed plate and lower fixed plate, be provided with the clamp plate between last fixed plate and the lower fixed plate, the upside of clamp plate has all cup jointed the spring on the guide rail post, the bottom intermediate position of clamp plate is equipped with pressure sensor, the top intermediate position of last fixed plate is located to the cylinder, leak detection mould is provided with a plurality ofly, range upon range of place between clamp plate and lower fixed plate. The connecting mode of the device has the advantages of stable structure, simpler fixation of the detection mould and the bipolar plate, easy operation, and being suitable for the fuel cell polar plate with the shape similar to a flat plate shape, obviously unsuitable for the exhaust valve with the three-dimensional shape, and unsuitable for the setting of the fixing mode and the mould, and the most critical defect is that the pressure detection is carried out through the pressure sensor, the leakage characteristic of the device cannot be directly judged after the pressure detected by the pressure sensor is visually displayed through the pressure gauge, and the special airtight leak detector is also required to be matched, so that the testing efficiency is directly influenced.
Therefore, it is imperative to design a set of convenient, quick, accurate and safe mechanical device for detecting the air tightness of the exhaust valve.
Disclosure of Invention
In view of the problems existing in the prior art, the invention provides a mechanical device for detecting the air tightness of an exhaust valve and a use method thereof, wherein the air with a set pressure value is introduced into a sealed exhaust valve cavity to be detected for a period of time, the air tightness of the exhaust valve to be detected is quantitatively judged according to the output change of pressure difference, the influence of the external environment on the test is reduced to the minimum, the whole test device is a fixed block which is organically combined with a sliding block driven by an air cylinder, and the detection of an air path is cooperated, so that the accurate and safe detection of the air tightness of the exhaust valve is realized, and the detection of a product to be detected is more convenient, quick, accurate and safe.
The technical scheme adopted by the invention is as follows: a mechanical device for discharge valve gas tightness detects, its characterized in that: the device comprises an air outlet end pressure gauge, an air outlet end pipeline, a fixed block, a sliding block, an air inlet end pressure gauge, an air inlet end pipeline, a dowel bar, a connecting plate, an adapter plate, a bottom plate and an air cylinder; the fixed block is arranged at one end of the bottom plate, an air inlet hole is arranged on the fixed block, and the position of the air outlet hole corresponds to the air outlet of the tested exhaust valve; the sliding block is arranged on the inner side of the fixed block, the sliding block is provided with an air outlet hole, and the position of the air inlet hole corresponds to the air inlet of the tested exhaust valve; the two adapter plates are arranged at the other end of the bottom plate, and two ends of the air cylinder are respectively arranged on the two adapter plates; the end head of the telescopic rod of the air cylinder is arranged on the connecting plate; the two dowel bars are arranged, one end of each dowel bar is symmetrically arranged on the sliding block, and the other end of each dowel bar is symmetrically arranged on the connecting plate; the air inlet end pipeline is arranged in an air inlet hole of the sliding block, the air inlet end pressure gauge is arranged at a pipe orifice of the air inlet end pipeline, the air outlet end pipeline is arranged in an air outlet hole of the fixed block, and the air outlet end pressure gauge is arranged at a pipe orifice of the air outlet end pipeline.
The inner diameters of the air outlet end pipeline and the air inlet end pipeline are 25mm, so that the air at the air outlet end is discharged smoothly, and the damage of the pressure to the tested exhaust valve is reduced.
The device further comprises four guide rods which are respectively arranged at four corners of the fixed block; the four corners of the sliding block are respectively provided with a guide hole corresponding to the guide rod, so as to play a role in guiding the sliding block and the fixed block.
According to the appearance of the measured exhaust valve, a workpiece groove I is formed in the inner side of the fixed block, the size of the workpiece groove I is two thirds of that of the measured exhaust valve, a workpiece groove II is formed in the inner side of the sliding block, the size of the workpiece groove II is one third of that of the measured exhaust valve, when the fixed block is tightly attached to the sliding block, the workpiece groove I and the workpiece groove II form a complete workpiece groove, the gravity center of the measured exhaust valve falls on the fixed block, the air outlet of the measured exhaust valve is communicated with an air outlet end pipeline, and the air inlet of the measured exhaust valve is communicated with an air inlet end pipeline.
The application method of the mechanical device for detecting the air tightness of the exhaust valve is characterized by comprising the following steps of: the top of the pick-up tool is a rubber sealing bowl-shaped structure, which comprises the following steps:
the first step: confirming that the air cylinder is in a closed state, retracting a dowel bar of the air cylinder, and separating a sliding block from a fixed block;
And a second step of: placing the tested exhaust valve in a workpiece groove I of the fixed block, wherein an air outlet of the tested exhaust valve is aligned with an air outlet hole on the fixed block, and the gravity center of the tested exhaust valve falls in the fixed block and cannot fall down;
and a third step of: opening a cylinder switch, pushing a connecting plate and two dowel bars by a cylinder telescopic rod to push the connecting plate and the two dowel bars to move forwards, enabling four guide bars on a fixed block to penetrate into guide holes on a sliding block, tightly attaching a sealing rubber ring on the surface of a tested exhaust valve to the cambered surfaces of a workpiece groove I and a workpiece groove II after the tested exhaust valve is tightly pressed, enabling the tested exhaust valve to fall into the workpiece groove at the moment, enabling an air outlet of the tested exhaust valve to be communicated with an air outlet end pipeline, and enabling an air inlet of the tested exhaust valve to be communicated with an air inlet end pipeline;
fourth step: the pressure values of the air outlet end pressure gauge and the air inlet end pressure gauge are respectively set to be 80 kPa, the valves of the air inlet end pipeline and the air outlet end pipeline are opened, and at the moment, gas sequentially passes through the air inlet end pressure gauge, the air inlet end pipeline, the sliding block, the tested exhaust valve, the fixed block, the air outlet end pipeline and the air outlet end pressure gauge to form a complete gas path; firstly closing a valve of an air outlet end pipeline, closing the valve of the air inlet end pipeline when the pressure of the air outlet end pressure gauge and the air inlet end pressure gauge reaches 80 kPa, observing the pressure difference between the air inlet end pressure gauge and the air outlet end pressure gauge within 30 seconds, wherein if the pressure difference is within a range of +/-1 kPa, the tested air outlet valve is a qualified product, and if the pressure difference exceeds the range of +/-1 kPa, the air outlet valve is a disqualified product;
Fifth step: after the test is finished, the cylinder switch is closed, the sliding block is separated from the fixed block, the valve of the air outlet end pipeline and the valve of the air inlet end pipeline are opened, the pressure of the whole system is reduced, and when the air outlet end pressure gauge and the air inlet end pressure gauge are displayed as zero, the top plane of the measured exhaust valve is sucked by a rubber bowl at the head of a tool by using a workpiece taking tool to ensure the safety of operators, and the measured exhaust valve is taken out.
The beneficial effects of the invention are as follows: the test device is simple in design, the whole test device is designed into a fixed assembly, a sliding assembly and a gas circuit detection assembly, other complex gas circuits are avoided, the influence of a pipeline on the test accuracy is reduced, and the reliability of the test device is improved; the design is strong in universality, the shapes and the sizes of the grooves of the fixed block and the sliding block can be adjusted according to different shapes and different sizes of the exhaust valve, and the universality of the jig is improved; the design cost is low, the testing device needs two pressure gauges, pipelines, air cylinders and part of mechanical parts to complete the assembly of the testing device, and the assembly is simple; the design test accuracy is high, the sliding block is pushed by a simple air cylinder, the tested exhaust valve is pressed by the grooves of the fixed block and the sliding block, and the sealing degree of the exhaust valve can be clearly quantized by comparing the difference value of the pressure gauge at the input end and the pressure gauge at the output end, so that the test accuracy is improved; the design operation is simple, and the air tightness of the tested exhaust valve is accurately detected by the action of a switch and the removal of the tested exhaust valve; the design safety is higher, in order to prevent operators from being injured by mistake when the exhaust valve to be tested is taken out, the exhaust valve to be tested is conveniently and rapidly taken out by using a special tool with a sucker.
Drawings
FIG. 1 is a structural isometric view of the present invention;
FIG. 2 is a structural isometric view of the present invention in an open state;
FIG. 3 is a structural isometric view of a mounting block of the present invention;
FIG. 4 is a bottom view of FIG. 3;
FIG. 5 is a structural isometric view of a slider of the present invention;
FIG. 6 is a left side view of FIG. 5;
fig. 7 is a schematic view of the structure of the base plate of the present invention.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
As shown in fig. 1 to 7, a mechanical device for detecting the air tightness of an exhaust valve comprises an air outlet end pressure gauge 1, an air outlet end pipeline 2, a fixed block 3, a sliding block 4, an air inlet end pressure gauge 5, an air inlet end pipeline 6, a dowel bar 7, a connecting plate 8, an adapter plate 9, a bottom plate 10, an air cylinder 11 and a guide rod;
Four threaded holes I10-3 for installing the fixed block 3 are formed in one end of the bottom plate 10, two fixed plates 10-1 for installing the adapter plate 9 are formed in the other end of the bottom plate 10, and an oval through hole 10-2 for reducing weight is formed in a proper position of the bottom plate 10;
Fixing the fixed block 3 at one end of the bottom plate 10 through four threaded holes II 3-3 at the bottom of the fixed block 3 and four threaded holes I10-3 of the bottom plate 10 by using four inner hexagon countersunk screws;
Four guide rods are respectively fixed in threaded holes III 3-2 at four corners of the fixed block 3 in a threaded connection mode, the fixed block 3 is provided with air outlet holes 3-1, and the positions of the air outlet holes 3-1 correspond to the air outlets of the tested exhaust valves 13;
The sliding block 4 is arranged on the inner side of the fixed block 3, guide holes 4-2 corresponding to the guide rods are respectively arranged at four corners of the sliding block 4, the guide rods 12 at four corners of the fixed block 3 respectively penetrate into the guide holes 4-2 at four corners of the sliding block 4 in the sliding process of the sliding block 4, the guiding effect of the sliding block 4 and the fixed block 3 is achieved, an air inlet hole 4-1 is formed in the sliding block 4, and the position of the air inlet hole 4-1 corresponds to the air inlet of the exhaust valve 13 to be tested;
The two adapter plates 9 are fixed on the two fixing plates 10-1 of the bottom plate 10 in a threaded connection mode, the two ends of the air cylinder 11 are respectively fixed on the two adapter plates 9, the end heads of the telescopic rods 11-1 of the air cylinder 11 are fixed in the through holes of the connecting plate 8 in a threaded connection mode, one ends of the two dowel bars 7 are fixedly connected with the sliding block 4 through threaded holes IV 4-3, and the other ends of the dowel bars are fixed with the connecting plate 8 through nuts through the two through holes to form a whole with the air cylinder 11;
a valve is arranged at the inlet end of the air inlet end pipeline 6, an air inlet end pressure gauge 5 is arranged behind the valve, and the other end of the air inlet pipeline 6 is screwed with the air inlet 4-1 on the sliding block through airtight threads; an outlet of an air outlet end pipeline 2 is provided with an air outlet end pressure gauge 1, a valve is arranged behind the air outlet end pressure gauge 1, and the other end of the air outlet pipeline 2 is screwed with an air outlet 3-1 on a fixed block 3 through airtight threads;
The bending of the air pipe and the change of the pipe diameter have influence on the pressure parameter in the test process. When testing is performed, the gas flow in the system is very large, and at the moment, the bending of the pipeline can cause the gas resistance to increase, so that the pressure of the system is increased. The parameter under the test state can be caused to deviate by the excessively high pressure, if the bending pressure is reduced and is directly added to the tested exhaust valve, the tested exhaust valve is easy to damage, through multiple experiments, the device position and the pipeline shape are finally determined in the detection device, the pipeline inner diameters of the air outlet end pipeline and the air inlet end pipeline are 25mm, the equivalent ventilation pipe diameter is ensured to be 25mm when the pipeline is opened, so that the air outlet end is smoothly discharged, and the damage of the pressure to the tested exhaust valve is reduced.
According to the appearance of the detected exhaust valve 13, a workpiece groove I3-4 is formed in the inner side of the fixed block 3, the size of the workpiece groove I3-4 is two thirds of that of the detected exhaust valve 13, a workpiece groove II 4-4 is formed in the inner side of the sliding block 4, the size of the workpiece groove II is one third of that of the detected exhaust valve 13, when the fixed block 3 is tightly attached to the sliding block 4, the workpiece groove I3-4 and the workpiece groove II 4-4 form a complete workpiece groove, the gravity center of the detected exhaust valve 13 falls in the fixed block 3, the air outlet of the detected exhaust valve 13 is communicated with the air outlet end pipeline 2, and the air inlet of the detected exhaust valve 13 is communicated with the air inlet end pipeline 6;
the use method of the mechanical device for detecting the air tightness of the exhaust valve comprises the following steps that a sealing bowl-shaped structure with rubber at the top of a piece taking tool 14 is adopted:
the first step: confirming that the air cylinder 11 is in a closed state, retracting the dowel bar 7 of the air cylinder, and separating the sliding block 4 from the fixed block 3;
And a second step of: placing the detected exhaust valve 13 in a workpiece groove I3-4 of the fixed block 3, wherein the air outlet of the detected exhaust valve 13 is aligned with the air outlet hole 3-1 on the fixed block 3, and the gravity center of the detected exhaust valve 13 falls in the fixed block 3 and cannot fall down;
And a third step of: opening the air cylinder 11, pushing the connecting plate 8 and the two dowel bars 7 by the air cylinder telescopic rod 11-1 to push forward, penetrating the four guide bars on the fixed block 3 into the guide holes 4-2 on the sliding block 4, tightly attaching the sealing rubber ring on the surface of the air exhaust valve 13 to the cambered surfaces of the workpiece grooves I3-4 and II 4-4 after the air exhaust valve 13 is compressed, and at the moment, falling the air exhaust valve 13 into the workpiece grooves, wherein the air outlet of the air exhaust valve 13 is communicated with the air outlet end pipeline 2, and the air inlet of the air exhaust valve 13 is communicated with the air inlet end pipeline 6;
Fourth step: the pressure values of the air outlet end pressure gauge 1 and the air inlet end pressure gauge 5 are respectively set to be 80 kPa, the valves of the air inlet end pipeline 6 and the air outlet end pipeline 2 are opened, and at the moment, gas sequentially passes through the air inlet end pressure gauge 5, the air inlet end pipeline 6, the sliding block 4, the tested exhaust valve 13, the fixed block 3, the air outlet end pipeline 2 and the air outlet end pressure gauge 1 to form a complete gas path; closing the valve of the air outlet end pipeline 2, closing the valve of the air inlet end pipeline 6 when the pressure of the air outlet end pressure gauge 1 and the air inlet end pressure gauge 5 reaches 80 kPa, observing the pressure difference between the air inlet end pressure gauge 5 and the air outlet end pressure gauge 1 within 30 seconds, wherein if the pressure difference is within a range of +/-1 kPa, the detected air outlet valve is a qualified product, and if the pressure difference exceeds a range of +/-1 kPa, the air outlet valve is a disqualified product.
Fifth step: after the test is finished, the switch of the air cylinder 11 is closed, the fixed block 3 and the sliding block 4 are separated, the valve of the air outlet end pipeline 2 and the valve of the air inlet end pipeline 6 are opened, the pressure of the whole system is reduced, when the air outlet end pressure gauge 1 and the air inlet end pressure gauge 5 are displayed as zero, in order to ensure the safety of operators, a piece taking tool 14 is used for sucking the top plane of the tested exhaust valve through a rubber bowl at the head of the tool, and the tested exhaust valve 13 is taken out to finish the test.
The working principle of a mechanical device for detecting the air tightness of an exhaust valve is as follows: and detecting whether the tightness of the detected exhaust valve is in a reasonable range or not by detecting the change of the pressure of the gas path after passing through the detected product by using the pressure gauge. The sliding assembly, the fixing assembly, the air inlet end air channel and the air outlet end air channel, the two ends of the air inlet end air channel and the air outlet end air channel are respectively provided with a sealed air channel formed by the two ends of the detection pressure gauge, the detected exhaust valve is closely attached to the cambered surface of the workpiece groove through the thrust of the air cylinder, the air inlet end air channel is opened, the pressure difference between the air inlet end pressure gauge and the air outlet end pressure gauge is observed within 30 seconds, if the pressure difference is within a reasonable range, the detected exhaust valve is a qualified product, and if the pressure difference exceeds a set range, the exhaust valve is a disqualified product.
The connection modes of the invention are threaded connection, and the implementation of the technical scheme of the invention by riveting, welding and other connection modes belongs to the protection scope of the invention.
Claims (3)
1. A mechanical device for discharge valve gas tightness detects, its characterized in that: the device comprises an air outlet end pressure gauge (1), an air outlet end pipeline (2), a fixed block (3), a sliding block (4), an air inlet end pressure gauge (5), an air inlet end pipeline (6), a dowel bar (7), a connecting plate (8), an adapter plate (9), a bottom plate (10) and an air cylinder (11); the fixed block (3) is arranged at one end of the bottom plate (10), the fixed block (3) is provided with an air outlet hole (3-1), and the position of the air outlet hole (3-1) corresponds to the air outlet of the tested exhaust valve (13); the sliding block (4) is arranged on the inner side of the fixed block (3), an air inlet hole (4-1) is formed in the sliding block (4), and the position of the air inlet hole (4-1) corresponds to the air inlet of the detected exhaust valve (13); the two adapter plates (9) are arranged at the other end of the bottom plate (10), and the two ends of the air cylinder (11) are respectively arranged on the two adapter plates (9); the end of the telescopic rod (11-1) of the air cylinder (11) is arranged on the connecting plate (8); the two dowel bars (7) are symmetrically arranged on the sliding block (4) at one end and on the connecting plate (8) at the other end; the air inlet end pipeline (6) is arranged in an air inlet hole (4-1) of the sliding block (4), the air inlet end pressure gauge (5) is arranged at the pipe orifice of the air inlet end pipeline (6), the air outlet end pipeline (2) is arranged in an air outlet hole (3-1) of the fixed block (3), and the air outlet end pressure gauge (1) is arranged at the pipe orifice of the air outlet end pipeline (2); the four guide rods are respectively arranged at four corners of the fixed block (3); guide holes (4-2) corresponding to the guide rods are respectively arranged at four corners of the sliding block (4); according to the appearance of survey discharge valve (13), set up work piece recess I (3-4) in the inboard of fixed block (3), the size is two thirds of survey discharge valve (13), set up work piece recess II (4-4) in the inboard of sliding block (4), the size is one third of survey discharge valve (13), when fixed block (3) and sliding block (4) closely paste, work piece recess is complete in work piece recess is constituteed to work piece recess I (3-4) and work piece recess II (4-4), the focus falls in fixed block (3) when putting into work piece recess by survey discharge valve (13), the gas outlet and the gas outlet of survey discharge valve (13) are put through with gas outlet end pipeline (2), the air inlet and the gas inlet end pipeline (6) of survey discharge valve (13) are put through.
2. A mechanical device for discharge valve gas tightness detects, its characterized in that: the inner diameters of the pipelines of the air outlet end pipeline (2) and the air inlet end pipeline (6) are 25mm.
3. A method of using a mechanical device for exhaust valve tightness detection according to claim 1, characterized in that: a rubber seal bowl-like structure on top of a pick-off tool (14) comprising the steps of:
The first step: confirming that the air cylinder (11) is in a closed state, retracting a dowel bar (7) of the air cylinder, and separating the sliding block (4) and the fixed block (3);
and a second step of: placing the detected exhaust valve (13) in a workpiece groove I (3-4) of the fixed block (3), wherein an air outlet of the detected exhaust valve (13) is aligned with an air outlet hole (3-1) on the fixed block (3), and the gravity center of the detected exhaust valve (13) falls in the fixed block (3) and cannot fall down;
And a third step of: opening a switch of an air cylinder (11), pushing a connecting plate (8) and two dowel bars (7) by an air cylinder telescopic rod (11-1) to push forward, penetrating four guide bars on a fixed block (3) into guide holes (4-2) on a sliding block (4), tightly pressing a tested exhaust valve (13), tightly attaching a sealing rubber ring on the surface of the tested exhaust valve (13) to the cambered surfaces of a workpiece groove I (3-4) and a workpiece groove II (4-4), wherein the tested exhaust valve (13) falls into the workpiece groove at the moment, the air outlet of the tested exhaust valve (13) is communicated with an air outlet end pipeline (2), and the air inlet of the tested exhaust valve (13) is communicated with an air inlet end pipeline (6);
Fourth step: the method comprises the steps of setting the pressure values of an air outlet end pressure gauge (1) and an air inlet end pressure gauge (5) to be 80 kPa respectively, opening a valve of an air inlet end pipeline (6) and a valve of an air outlet end pipeline (2), and enabling air to sequentially pass through the air inlet end pressure gauge (5), the air inlet end pipeline (6), a sliding block (4), a tested exhaust valve (13), a fixed block (3), the air outlet end pipeline (2) and the air outlet end pressure gauge (1) to form a complete air path; firstly closing a valve of an air outlet end pipeline (2), closing a valve of an air inlet end pipeline (6) when the pressure of an air outlet end pressure gauge (1) and an air inlet end pressure gauge (5) reaches 80 kPa, observing the pressure difference between the air inlet end pressure gauge (5) and the air outlet end pressure gauge (1) within 30 seconds, wherein if the pressure difference is within a range of +/-1 kPa, a detected exhaust valve is a qualified product, and if the pressure difference exceeds the range of +/-1 kPa, the exhaust valve is a disqualified product;
Fifth step: after the test is finished, the switch of the air cylinder (11) is closed, the sliding block (4) is separated from the fixed block (3), the valve of the air outlet end pipeline (2) and the valve of the air inlet end pipeline (6) are opened, the pressure of the whole system is reduced, and when the air outlet end pressure gauge (1) and the air inlet end pressure gauge (5) are displayed as zero, the air outlet valve (13) is taken out by sucking the top plane of the air outlet valve through a rubber bowl at the head of the tool by using a pick-up tool (14) to ensure the safety of operators, so that the test is finished.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111495475.9A CN114199477B (en) | 2021-12-09 | 2021-12-09 | Mechanical device for detecting air tightness of exhaust valve and use method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111495475.9A CN114199477B (en) | 2021-12-09 | 2021-12-09 | Mechanical device for detecting air tightness of exhaust valve and use method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114199477A CN114199477A (en) | 2022-03-18 |
| CN114199477B true CN114199477B (en) | 2024-06-14 |
Family
ID=80651450
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111495475.9A Active CN114199477B (en) | 2021-12-09 | 2021-12-09 | Mechanical device for detecting air tightness of exhaust valve and use method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114199477B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114754947A (en) * | 2022-04-30 | 2022-07-15 | 台州市广易不锈钢阀门有限公司 | Valve air tightness detection device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202471374U (en) * | 2011-12-31 | 2012-10-03 | 凯迈（洛阳）气源有限公司 | Multifunctional airtightness detection apparatus |
| CN113218594A (en) * | 2021-03-25 | 2021-08-06 | 中国电子科技集团公司第三十八研究所 | Differential pressure type air tightness online detection mechanism |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN207439625U (en) * | 2017-05-09 | 2018-06-01 | 成都特恩达燃气设备有限公司 | A kind of multi-functional air tightness detection equipment |
| CN209069579U (en) * | 2018-11-28 | 2019-07-05 | 淄博新诺机械有限公司 | A kind of air pressure-adjusting valve comprehensive test device |
| CN209858206U (en) * | 2019-05-10 | 2019-12-27 | 邯郸市远华机械制造股份有限公司 | Valve production quality detection device |
| CN212903744U (en) * | 2020-10-16 | 2021-04-06 | 深圳市海凌科技有限公司 | Pneumatic test fixture of gas tightness |
-
2021
- 2021-12-09 CN CN202111495475.9A patent/CN114199477B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202471374U (en) * | 2011-12-31 | 2012-10-03 | 凯迈（洛阳）气源有限公司 | Multifunctional airtightness detection apparatus |
| CN113218594A (en) * | 2021-03-25 | 2021-08-06 | 中国电子科技集团公司第三十八研究所 | Differential pressure type air tightness online detection mechanism |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114199477A (en) | 2022-03-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN114199477B (en) | Mechanical device for detecting air tightness of exhaust valve and use method | |
| CN106679896B (en) | Helium leakage detection device for small tube sheet welding test piece | |
| CN214621055U (en) | Assembling and detecting combined production line for automobile engine chain tensioner | |
| CN208514187U (en) | Engine cylinder body processing examines tooling with gas | |
| CN111912584A (en) | Air tightness detection device for electric locomotive air supply system | |
| CN214309355U (en) | Self-judgment sealing performance detection device | |
| CN110631693B (en) | Vibration detector for operation of air compressor | |
| CN110274729B (en) | Quick inspection device of automatic quick-change clamp tray for multiple joints | |
| CN212779782U (en) | Dry-wet composite dual-purpose angle valve sealing performance detection device | |
| CN214620947U (en) | Tensioner casing and plunger equipment quality detection equipment | |
| CN204881998U (en) | Utensil is examined to diversified ladder face press the sealing formula crankcase body gas tightness | |
| CN211318673U (en) | Pressure switch complete detection table | |
| CN216869901U (en) | Comprehensive detection device for air tightness and flow of exhaust manifold | |
| CN211678854U (en) | Flange leakage test machine | |
| CN220568360U (en) | Oil inlet valve leakage detection device | |
| CN207335986U (en) | A kind of equipment of more bellowss airtight test at the same time | |
| CN220625644U (en) | Clamp for ECU air tightness analysis | |
| CN110640651A (en) | Universal pinhole type cavity vacuum adsorption clamp | |
| CN221326179U (en) | Withstand voltage test fixture of spring pipe | |
| CN219075453U (en) | Diaphragm valve test fixture | |
| CN210004898U (en) | exhaust manifold boss position degree detection tool | |
| CN109799038A (en) | Pressurized spray resistance test instrument | |
| CN220230834U (en) | Electronic oil pump controller cavity airtight testing mechanism adapting to automatic production line | |
| CN203798557U (en) | Movable testing device for actuating pressure detection of air conditioner throttle valve under normal temperature operation | |
| CN108051160B (en) | Vacuum chuck leakproofness testing platform |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |