CN205015140U - Car air pipe reveals test fixture - Google Patents
Car air pipe reveals test fixture Download PDFInfo
- Publication number
- CN205015140U CN205015140U CN201520772903.1U CN201520772903U CN205015140U CN 205015140 U CN205015140 U CN 205015140U CN 201520772903 U CN201520772903 U CN 201520772903U CN 205015140 U CN205015140 U CN 205015140U
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- output terminal
- pressure
- anger
- flowmeter
- plugging sheet
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- 238000012360 testing method Methods 0.000 title claims abstract description 34
- 238000009530 blood pressure measurement Methods 0.000 claims abstract description 16
- 238000000034 method Methods 0.000 claims description 11
- 230000008569 process Effects 0.000 claims description 10
- 238000007789 sealing Methods 0.000 claims description 10
- 238000009423 ventilation Methods 0.000 claims description 10
- 238000005538 encapsulation Methods 0.000 claims description 6
- 230000000087 stabilizing effect Effects 0.000 claims description 6
- 238000013016 damping Methods 0.000 abstract 2
- 239000002985 plastic film Substances 0.000 description 10
- 230000007547 defect Effects 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 230000007812 deficiency Effects 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 239000004831 Hot glue Substances 0.000 description 1
- 239000002390 adhesive tape Substances 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000008393 encapsulating agent Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Landscapes
- Examining Or Testing Airtightness (AREA)
Abstract
The utility model discloses a car air pipe reveals test fixture, include: compressed air source, the relief pressure valve subassembly of being connected with compressed air source's output, the surge damping valve subassembly of being connected with the output of relief pressure valve subassembly, air inlet shutoff piece, the input of inlet flow inlet flow meter is connected with the output of surge damping valve subassembly, and the output of inlet flow meter is connected with the inlet port of air inlet shutoff piece, gas outlet shutoff piece, the flowmeter of giving vent to anger, the input and the venthole of gas outlet shutoff piece of the flowmeter of giving vent to anger are connected, and compressed air is discharged to the output of the flowmeter of giving vent to anger, pressure measurement shutoff piece, the manometer that pressure measurement input and the piezometer orifice of pressure measurement shutoff piece are connected. Can reflect the condition of revealing of work piece sample through calculating to count through inlet flow and measure the difference through the change of the flowmeter of giving vent to anger in specified time, and then obtain the gas tightness condition of work piece sample. The utility model discloses a measuring accuracy can reach 3Pa, can provide ultralow pressure leak testing the condition.
Description
Technical field
The utility model relates to auto parts and components test fixture field, particularly a kind of automotive ventilation pipeline leakage test fixture.
Background technology
Automobile use ventilating duct and need other auto parts and components carrying out air-leakage test, need in process of production to detect its impermeability, and also do not have at present a kind of structure simple and measuring accuracy is high equipment can detect the impermeability of automotive ventilation pipeline.
Utility model content
The purpose of this utility model is above-mentioned deficiency for prior art and defect, provides a kind of automotive ventilation pipeline leakage test fixture, to solve the problem.
The technical matters that the utility model solves can realize by the following technical solutions:
Automotive ventilation pipeline leakage test fixture, is characterized in that, comprising:
Compressed air source;
The pressure reducing valve component be connected with the output terminal of described compressed air source;
The pressure maintaining valve assembly be connected with the output terminal of described pressure reducing valve component;
Sealing is arranged on needs the tested and air intake opening plugging sheet carried out on the air intake opening of the sample workpiece of encapsulation process, described air intake opening plugging sheet is provided with the air admission hole with the inner space of described sample workpiece;
Inlet air flow gauge, the input end of described inlet air flow gauge is connected with the output terminal of described pressure maintaining valve assembly, and the output terminal of described inlet air flow gauge is connected with the air admission hole of described air intake opening plugging sheet;
Sealing is arranged on needs the tested and gas outlet plugging sheet carried out on the gas outlet of the sample workpiece of encapsulation process, described gas outlet plugging sheet is provided with the venthole with the inner space of described sample workpiece;
To give vent to anger flowmeter, described in the give vent to anger input end of flowmeter be connected with the venthole of described gas outlet plugging sheet, described in the give vent to anger output terminal of flowmeter pressurized air is discharged;
Sealing is arranged on needs the tested and pressure measurement plugging sheet carried out on the sample workpiece of encapsulation process, described pressure measurement plugging sheet is provided with the pressure tap with the inner space of described sample workpiece;
The measuring cell that pressure measurement input end is connected with the pressure tap of described pressure measurement plugging sheet.
In a preferred embodiment of the present utility model, described pressure reducing valve component comprises one-level pressure relief valve and second depressurized valve, the input end of described one-level pressure relief valve is connected with the output terminal of described compressed air source, the output terminal of described one-level pressure relief valve is connected with the input end of described second depressurized valve, and the output terminal of described second depressurized valve is connected with the input end of described pressure maintaining valve assembly.
In a preferred embodiment of the present utility model, described pressure maintaining valve assembly is high-precision voltage stabilizing variable valve.
In a preferred embodiment of the present utility model, digital micro manometer is counted in described pressure measurement.
Owing to have employed technical scheme as above, the utility model structure is simple, by calculating at the appointed time by inlet air flow gauge and the leak case being reflected sample workpiece by the variable quantity difference of flowmeter of giving vent to anger, and then the impermeability situation of sample workpiece can be obtained.Measuring accuracy of the present utility model can reach ± 3Pa, can provide ultralow pressure Leak Detection condition.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only embodiments more of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the fundamental diagram of a kind of embodiment of the utility model.
Embodiment
The technological means realized to make the utility model, creation characteristic, reaching object and effect is easy to understand, setting forth the utility model further below.
Automotive ventilation pipeline leakage test fixture shown in Figure 1, comprises compressed air source 100, the pressure reducing valve component 200 be made up of one-level pressure relief valve 210 and second depressurized valve 220, high-precision voltage stabilizing variable valve 300, inlet air flow gauge 400, give vent to anger flowmeter 500 and digital micro manometer 600.
The output terminal 110 of compressed air source 100 is connected with the input end 211 of one-level pressure relief valve 210 by pipeline 1, the output terminal 212 of one-level pressure relief valve 210 is connected with the input end 221 of second depressurized valve 220 by pipeline 2, and the output terminal 222 of second depressurized valve 220 is connected with the input end 310 of high-precision voltage stabilizing variable valve 300 by pipeline 3.On the air intake opening 710 of sample workpiece 700 and gas outlet 720, sealing is provided with air intake opening shutoff plastic sheet 10 and gas outlet shutoff plastic sheet 20 respectively, and air intake opening shutoff plastic sheet 10 and gas outlet shutoff plastic sheet 20 are respectively arranged with and the air admission hole 11 of the inner space of sample workpiece 700 and venthole 21.The input end 410 of inlet air flow gauge 400 is connected with the output terminal 320 of high-precision voltage stabilizing variable valve 300 by pipeline 4, and the output terminal 420 of inlet air flow gauge 400 is connected 11 by pipeline 5 with the air admission hole of air intake opening shutoff plastic sheet 10.The input end 510 of flowmeter 500 of giving vent to anger is connected by the venthole 21 of pipeline 6 with gas outlet shutoff plastic sheet 20, and pressurized air is discharged by the output terminal 520 of flowmeter 500 of giving vent to anger.On sample workpiece 700, also sealing is provided with pressure measurement shutoff plastic sheet 30, and pressure measurement shutoff plastic sheet 30 is provided with the pressure tap 31 with the inner space of sample workpiece 700, the pressure measurement input end 610 of digital micro manometer 600 is connected with pressure tap 31 by passage 7.
The course of work of the present utility model and principle of work as follows:
Prepare before test:
1), between pipeline connector position before testing, uses Leakage inspection agent to check whether leakage, and as found, leakage need reseal;
2), sample inspection: carry out visual examination to sample part, part requirements is without breakage with without open defect (as deficiency, burning), and not Short Item, goods are complete.
3), the shutoff of sealing surface before test: with the requirement of customer communication part function, as air intake opening, position, gas outlet, possible leakage point and concrete test condition, determine shutoff position and shutoff scheme, according to goods occluding member structure and shape, cut suitable shutoff plastic sheet;
4), for the plastic sheet of air intake opening and gas outlet shutoff before shutoff, first pre-processed air admission hole, venthole and pressure tap (tracheae of aperture size and connection and conduit coupling);
5), by the encapsulant (3M adhesive tape, hot melt adhesive, high-low temperature resistant clay etc.) of necessity, part to be tested is sealed position and carry out shutoff, guarantee that sealing surface does not leak;
6), the complete part of shutoff is connected with each pipeline leaked on stand, and with lute in shutoff connector.
Process of the test:
1), one-level, second depressurized valve 210,220 are adjusted to closed condition, open the gas circuit main valve of compressed air source 100, compressed air source 100 is made to reach capacity (about 0.7MPa) after state, open one-level pressure relief valve 210, treat that source of the gas is stablized, open second depressurized valve 220, and progressively regulate second depressurized valve 220 knob, regulate from small to large, make the reading of display on digital micro manometer 600 close to test pressure;
2), regulate valve on high-precision voltage stabilizing variable valve 300, make pressure stability control after within the scope of test pressure ± 3pa, to start test, note in debug process because pressure is set up have hysteresis quality, to finely tune.
3), the front leak detectants of official testing (suds or gas leak detection liquid), check shutoff position and connecting pipe position, No leakage produces (bubble-free generation), formally can start leak-testing, once find that shutoff position is leaked, need shutoff again and again hunt leak, after confirming No leakage, entering test phase;
4), timing 60s, record inlet air flow gauge 400 and flowmeter 500 actual initial flow (MA1 and MB1) unit of giving vent to anger: cubic meter before test starts simultaneously, record inlet air flow gauge 400 after 60s and the accumulative total flow (MA2 and MB2) of flowmeter 500 reality of giving vent to anger, leaking rate formulas is as follows simultaneously:
In 60s by the flow of inlet air flow gauge 400 be
△ MA=(MA2-MA1) × 1000 (unit: L)
In 60s by the flow of flowmeter 500 of giving vent to anger be
△ MB=(MB2-MB1) × 1000 (unit: L)
Pipe leakage amount=(△ MA-△ MB)/1min unit: L/min
Or (△ MA-△ MB)/60S unit: L/S
MA1: inlet air flow gauge 400 tests front flow MA2: inlet air flow gauge 400 tests rear flow
MB1: front flow MB2 tested by flowmeter 500 of giving vent to anger: rear flow tested by flowmeter 500 of giving vent to anger
Non-tight position leakage rate:
According to actual parts situation, part non-tight position or connecting portion leakage existence may be there is, as (injection moulding pore, tissue looseness cause hidden leakage), the leakage that such factor causes has been added to total leakage in testing and has suffered, as client's special requirement, and can all air inlets, give vent to anger, connecting hole and face of weld carry out thorough shutoff, carry out Leak Detection to part, finally draw the leakage rate (testing by the step of above-mentioned test process) that the reasons such as forming defect cause.
After off-test, close total source of the gas, close one-level, second depressurized valve 210,220 successively, the lower exemplar of dismounting, gather original test record and stand arrangement is clean and on-the-spot 5S work.
Judge:
Single airduct: 500pa, leakage rate≤14L/min
Two airducts connect: 250pa, leakage rate≤36L/min
The particular pressure test request that other clients propose and decision method.
More than show and describe ultimate principle of the present utility model and principal character and advantage of the present utility model.The technician of the industry should understand; the utility model is not restricted to the described embodiments; what describe in above-described embodiment and instructions just illustrates principle of the present utility model; under the prerequisite not departing from the utility model spirit and scope; the utility model also has various changes and modifications, and these changes and improvements all fall within the scope of claimed the utility model.The claimed scope of the utility model is defined by appending claims and equivalent thereof.
Claims (4)
1. automotive ventilation pipeline leakage test fixture, is characterized in that, comprising:
Compressed air source;
The pressure reducing valve component be connected with the output terminal of described compressed air source;
The pressure maintaining valve assembly be connected with the output terminal of described pressure reducing valve component;
Sealing is arranged on needs the tested and air intake opening plugging sheet carried out on the air intake opening of the sample workpiece of encapsulation process, described air intake opening plugging sheet is provided with the air admission hole with the inner space of described sample workpiece;
Inlet air flow gauge, the input end of described inlet air flow gauge is connected with the output terminal of described pressure maintaining valve assembly, and the output terminal of described inlet air flow gauge is connected with the air admission hole of described air intake opening plugging sheet;
Sealing is arranged on needs the tested and gas outlet plugging sheet carried out on the gas outlet of the sample workpiece of encapsulation process, described gas outlet plugging sheet is provided with the venthole with the inner space of described sample workpiece;
To give vent to anger flowmeter, described in the give vent to anger input end of flowmeter be connected with the venthole of described gas outlet plugging sheet, described in the give vent to anger output terminal of flowmeter pressurized air is discharged;
Sealing is arranged on needs the tested and pressure measurement plugging sheet carried out on the sample workpiece of encapsulation process, described pressure measurement plugging sheet is provided with the pressure tap with the inner space of described sample workpiece;
The measuring cell that pressure measurement input end is connected with the pressure tap of described pressure measurement plugging sheet.
2. automotive ventilation pipeline leakage test fixture as claimed in claim 1, it is characterized in that, described pressure reducing valve component comprises one-level pressure relief valve and second depressurized valve, the input end of described one-level pressure relief valve is connected with the output terminal of described compressed air source, the output terminal of described one-level pressure relief valve is connected with the input end of described second depressurized valve, and the output terminal of described second depressurized valve is connected with the input end of described pressure maintaining valve assembly.
3. automotive ventilation pipeline leakage test fixture as claimed in claim 1, it is characterized in that, described pressure maintaining valve assembly is high-precision voltage stabilizing variable valve.
4. automotive ventilation pipeline leakage test fixture as claimed in claim 1, it is characterized in that, digital micro manometer is counted in described pressure measurement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520772903.1U CN205015140U (en) | 2015-09-30 | 2015-09-30 | Car air pipe reveals test fixture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520772903.1U CN205015140U (en) | 2015-09-30 | 2015-09-30 | Car air pipe reveals test fixture |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205015140U true CN205015140U (en) | 2016-02-03 |
Family
ID=55213735
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520772903.1U Expired - Fee Related CN205015140U (en) | 2015-09-30 | 2015-09-30 | Car air pipe reveals test fixture |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205015140U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112983640A (en) * | 2021-01-29 | 2021-06-18 | 广西玉柴机器股份有限公司 | Method and system for self-cleaning venturi tube by using compressed air of engine |
| CN114113452A (en) * | 2021-10-26 | 2022-03-01 | 安徽元琛环保科技股份有限公司 | Evaluation device and evaluation method for denitration and denitration of catalyst, VOCs and dioxin |
-
2015
- 2015-09-30 CN CN201520772903.1U patent/CN205015140U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112983640A (en) * | 2021-01-29 | 2021-06-18 | 广西玉柴机器股份有限公司 | Method and system for self-cleaning venturi tube by using compressed air of engine |
| CN114113452A (en) * | 2021-10-26 | 2022-03-01 | 安徽元琛环保科技股份有限公司 | Evaluation device and evaluation method for denitration and denitration of catalyst, VOCs and dioxin |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160203 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |