CN203893998U - Testing device for wing fuel tank rivet airtightness testing - Google Patents
Testing device for wing fuel tank rivet airtightness testing Download PDFInfo
- Publication number
- CN203893998U CN203893998U CN201420306838.9U CN201420306838U CN203893998U CN 203893998 U CN203893998 U CN 203893998U CN 201420306838 U CN201420306838 U CN 201420306838U CN 203893998 U CN203893998 U CN 203893998U
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- cover box
- pick
- top bracket
- wing
- fine setting
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Abstract
The utility model provides a testing device for wing fuel tank rivet airtightness testing. The device comprises an attaching collection mechanism and a fine tuning retractable mechanism. The attaching collection mechanism comprises a cover box, inside which is arranged a testing channel. The fine tuning retractable mechanism comprises a top supporting plate, a flange and a fine tuning supporting column. A holding cavity is enclosed by the flange and the top supporting plate. The semispherical head of the fine tuning supporting column is held in the holding cavity and is in clearance fit with the holding cavity. Ball plungers are evenly distributed on the cover box to prevent sliding friction between the cover box and the outer wall of a wing. Aimed at the curved surface characteristics of the outer wall of the wing, the fine tuning retractable mechanism prevents hard contact between the cover box and the outer wall of the wing. The fine tuning supporting column can move up and down on a retractable jacket seat to prevent the cover box from damaging composite material of the outer wall of the wing. The adjustable structure of the device determines that the device has reliable position contact precision. The work efficiency is improved, the production and maintenance costs are lowered, and stable test results are ensured.
Description
Technical field
The invention belongs to wing tank impermeability detection technique field, relates in particular to a kind of pick-up unit detecting for connection rivet place impermeability.
Background technology
Aircraft wing is made up of parts such as wing tank, undercarriage and wing outer walls, and it installs fixing by connection rivet.Wing tank gas leakage brings important potential safety hazard can to the aircraft of navigation.Wing assembling manufacture process, easy hair band is leaked at connection rivet place, and therefore, connection rivet place sealing propertytest is particularly important.
Conventional wing tank detection method has vertical compression pointer interpretation method, differential pressure Comparison Method, special gas chemical reaction method and helium mass spectrum leak detection method.
Vertical compression pointer interpretation method is that the pressurized air of authorised pressure is filled with to wing tank, blocks source of the gas after pressure stability, and in official hour, thereby whether monitoring machinery or digital pressure meter reading change and determine whether leakage; The method cost is lower, and ease for operation is high, but can only judge that whether the entirety of fuel tank leak, simultaneously operating personnel's fatiguability, exist artificial deviation, cannot digital quantization leakage value, and cannot judge leakage point.
Differential pressure Comparison Method is that the pressurized air of authorised pressure is filled with to wing tank, blocks source of the gas after pressure stability, in official hour, judges the leakage situation of fuel tank by the airtight leak locator of differential pressure type; The method cost is lower, and ease for operation is high, and compared with vertical compression pointer interpretation method, it can quantize the overall leakage value of wing tank, but cannot judge leakage point.
Special gas chemical reaction method is that special gas (as ammonia) is filled with to wing tank, spray chemical reaction liquid at wing shell, in the time of rivet place or the generation leakage of other positions, special gas contacts with chemical reaction liquid by leak source, cause its color to change, thereby judge leakage point; The method can be determined leakage point position, but cannot quantify leaks value, and operating environment is had relatively high expectations simultaneously, when testing process detects as ammonia method, because test gas stimulation has taste, harmful, therefore needs to wear gas defence filtration unit and carries out testing.
Helium mass spectrum leak detection method is that helium nitrogen mixed gas concentration proportioning is certain, authorised pressure is filled with wing tank, just judgement (being suction gun method) is collected respectively to by each rivet place, confirms leak source quantify leaks value according to leak judgement standard.The method operation is succinct, quantitative criteria.
For helium mass spectrum leak detection method, conventional art is directly to use vacuum cup or rigid material suction gun docile wing outer wall, collects detection.Helium mass spectrum leak detection method normal operating conditions does not need to seal completely, need have certain flow, while adopting vacuum cup method to adhere to absorption, very easily causes sealing completely, causes equipment Inspection fault.Easily scratch shell and use rigid material cover box directly to contact wing outer wall, so will leak for wing tank rivet place, provide a kind of pick-up unit that is more applicable to Helium Leak Test herein.
Summary of the invention
The problem that the invention will solve is to provide a kind of pick-up unit detecting for connection rivet place impermeability, has solved and has assisted helium mass spectrometer leak detector to judge leakage point whether qualified according to the standard determination leakage value quantizing.For the curve form of wing outer wall, this pick-up unit can docile aerofoil surface be collected test gas, wing outer wall is not damaged simultaneously.
For solving the problems of the technologies described above, the technical scheme that the invention adopts is: a kind of pick-up unit detecting for wing tank rivet impermeability, is characterized in that: comprise and lay respectively at upper and lower docile collecting mechanism and vernier expansion mechanism;
Described docile collecting mechanism comprises: be roughly cylindrical shape cover box 20, its inside is provided with sense channel, and the entrance 201 of sense channel is opened in the upper surface of cover box, and the outlet of sense channel connects hydraulic quick coupler 14, needle valve 12 successively;
Described vernier expansion mechanism comprises: top bracket 17, ring flange 5 and fine setting pillar 8, and wherein, cover box 20 is fixed on top bracket 17 tops, and ring flange 5 is fixed on top bracket 17 belows; Between ring flange 5 and top bracket 17, be arranged with a container cavity 51, ring flange 5 bottoms are provided with a through hole connecting with container cavity 51, fine setting pillar 8 comprises the shaft-like body of concentric and is fixed on the hemispheric head 81 on body top, head 81 is contained in container cavity 51, clearance fit between head 81 and container cavity 51, and the spherical of head 81 is towards top bracket 17 bottom surfaces; Shaft-like body passes through hole and is also clearance fit between the two.
Further, the described cover box 20 upper surfaces formation groove that caves in centered by sense channel entrance 201.
Further, cover box 20 upper surface peripheries are also all established multiple bulb plungers 21.
Further, in top bracket 17, be also fixed with some range sensors 18 that are distributed in cover box periphery.
Further, the shaft-like body that stretches out the fine setting pillar 8 by hole overlaps successively and has press spring base 4 and rectangle stage clip 3, also include a flexible block set 2, this flexible block set 2 has a sleeve, the sealing of sleeve bottom, top end opening, sleeve sidepiece has a guiding slotted eye, the bottom of the shaft-like body of fine setting pillar 8 is stretched in sleeve and can in sleeve, be moved up and down, shaft-like body bottom is also vertically fixed with joint pin 6, relative rotation when joint pin 6 coordinates guiding slotted eye constraint fine setting pillar 8 to move up and down in sleeve.
Further, flexible block set 2 is also fixed with bottom plate 1, between bottom plate 1 and top bracket 17, centered by fine setting pillar 8, is evenly equipped with the extension spring 16 being fixedly connected with top bracket 17 with bottom plate 1 respectively by extension spring pillar 15.
Further, the top bracket 17 aciculiform cylinder 9 that is also connected, the piston rod part of aciculiform cylinder 9 is also fixed with a seal 11.
The advantage that the invention has with good effect is: different from existing sucker docile wing outer wall, this pick-up unit is mainly made up of vernier expansion mechanism and docile collecting mechanism two parts.First the bulb plunger on docile collecting mechanism, has avoided the sliding friction of cover box and the wing outer wall of pick-up unit, is that rolling contact type slides.Secondly for the curved surface characteristic of wing outer wall, the universal post top portion on vernier expansion mechanism adopts ball head structure form design.Contact with the rigid of wing outer wall for avoiding covering box, the fine setting pillar on vernier expansion mechanism can move up and down in flexible block set, prevents from covering box by the composite failure of wing outer wall.Adjustable version of above-mentioned detection device determines that it has reliable position contact precision, has improved work efficiency, has reduced production and maintenance cost, has ensured the stable of testing result.
Brief description of the drawings
Fig. 1 is the schematic perspective view of the pick-up unit of the invention;
Fig. 2 and Fig. 3 are respectively the schematic perspective views separately of upper and lower two chief components of pick-up unit;
Fig. 4 is the decomposing schematic representation of the lower part of pick-up unit;
Fig. 5 is the decomposing schematic representation of the upper part of pick-up unit;
What Fig. 6 mainly represented is anti-version in relative rotation between fine setting pillar and flexible block set;
Fig. 7 is the cross-sectional schematic of vernier expansion mechanism chief component;
What Fig. 8 mainly represented is the action mode of extension spring in pick-up unit;
The view of Fig. 9 pick-up unit docile on wing outer wall;
Figure 10 is the cross-sectional schematic of pick-up unit major part;
Figure 11 is the enlarged diagram of circle part in Figure 10;
Figure 12 is the mode that the is used in combination schematic diagram that pick-up unit is equipped with handle;
Figure 13 is that pick-up unit is installed on the mode that the is used in combination schematic diagram on mechanical arm;
The Reference numeral of chief component in figure: 1, bottom plate; 2, flexible block set; 3, rectangle stage clip; 4, press spring base; 5, ring flange; 6, joint pin; 7, E type catch; 8, fine setting pillar; 9, aciculiform cylinder; 10, cylinder support plate; 11, seal; 12, needle valve; 13, needle valve bearing; 14, hydraulic quick coupler; 15, extension spring pillar; 16, extension spring; 17, top bracket; 18, range sensor; 19, cover box supporting plate; 20, cover box; 21, bulb plunger.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the invention is elaborated.
As shown in Figure 1 to Figure 3, the pick-up unit of the invention is mainly made up of with the vernier expansion mechanism two parts as shown in Figure 3 that are positioned at below the docile collecting mechanism as shown in Figure 2 that is positioned at top;
Docile collecting mechanism comprises: cover box 20, it is roughly cylindrical shape, cover box 20 inside are provided with sense channel (as shown in the cut-open view of Figure 10 and Figure 11), and the entrance 201 of sense channel is opened in the upper surface (as shown in Fig. 2, Figure 10 and Figure 11) of cover box; As shown in Figure 4, the outlet of sense channel through hydraulic quick coupler 14, needle valve 12 (it is fixing by needle valve bearing 13), is finally communicated with helium mass spectrometer leak detector (not shown) successively.Cover box upper surface docile, in detected material surface (below taking wing outer wall as example), is passed to helium mass spectrometer leak detector by sense channel by the test gas of the leakage of collecting, and carries out Leak Detection.This cover box 20 should select the material of not adsorbing helium to process.
In addition, also can centered by sense channel entrance 201, cave in and form groove (circular best) at cover box 20 upper surfaces, to enclose the acquisition cavity that forms gas leakage when groove perisporium and the laminating of wing outer wall, groove perisporium upper surface also can all be established multiple bulb plungers 21, bulb plunger 21 docile wing outer wall roll-slidings, avoid friction to damage.The cavity volume setting of acquisition cavity is less, and the passage internal diameter of sense channel should be between 1 to 3mm.
The effect of needle valve 12: the test gas that cover box is collected enters helium mass spectrometer leak detector after regulating by needle valve 12, and the flow adjustment range of needle valve 12 should be within helium mass spectrometer leak detector claimed range.
As shown in Figure 4, the citation form of vernier expansion mechanism comprises: top bracket 17, ring flange 5 and fine setting pillar 8, wherein, cover box 20 is fixed on top bracket 17 tops (the present embodiment is by cover box supporting plate 19, cover box 20 and top bracket 17 to be linked together), and ring flange 5 is fixed on top bracket 17 belows; As shown in Figure 7, between ring flange 5 and top bracket 17, be arranged with a container cavity 51, ring flange 5 bottoms are provided with a through hole connecting with container cavity 51, fine setting pillar 8 comprises the shaft-like body of concentric and is fixed on the hemispheric head 81 on body top, head 81 is contained in container cavity 51, clearance fit between head 81 and container cavity 51 (corresponding gap as shown in the L4 of Fig. 7, L5), and the spherical of head 81 is towards top bracket 17 bottom surfaces; Shaft-like body passes through hole and is also clearance fit (both gaps as shown in the L3 in Fig. 7) between the two; Because the spherical of head 81 is towards top bracket 17 bottom surfaces, between additional head 81 and container cavity 51, leave gap, shaft-like body and through hole and also leave gap, therefore, angle between fine setting pillar 8 and top bracket and ring flange can realize slight adjustment, better fits with wing outer wall thereby realize the cover box 20 of supporting.Bulb plunger is arranged on the surrounding of cover box top, and head 81 land portions can realize low-angle roll rotational in container cavity 51 inside, when docile wing outer wall detects, can effectively reduce the impact of friction slip, avoid causing surperficial scuffing.
As further improvement, in top bracket 17, be also fixed with some range sensors 18 that are distributed in cover box periphery; When the cover box of pick-up unit and the distance of wing outer wall are when larger, if cover box is not perpendicular to check point place face, cover box and detection faces just have gap, equipment can suck large quantity of air, thereby affect the accuracy of detection of helium mass spectrometer leak detector, therefore, can this segment distance of effective monitoring at cover box surrounding mounting distance sensor, to carry out at random position adjustment.
As further improvement, as shown in Figure 4, the shaft-like body that stretches out the fine setting pillar 8 by hole overlaps successively and has press spring base 4 and rectangle stage clip 3, also include a flexible block set 2, this flexible block set 2 has a sleeve, the sealing of sleeve bottom, top end opening, sleeve sidepiece has a guiding slotted eye, the bottom of the shaft-like body of fine setting pillar 8 is stretched in sleeve and can in sleeve, be moved up and down, shaft-like body bottom is also by pin-and-hole be fixed with joint pin 6 vertical with E type back-up ring 7, relative rotation when joint pin 6 coordinates guiding slotted eye constraint fine setting pillar 8 to move up and down in sleeve.
On the basis of the above, as shown in Figure 4, flexible block set 2 is also fixed with bottom plate 1, between bottom plate 1 and top bracket 17, centered by fine setting pillar 8, be evenly equipped with the extension spring 16 being fixedly connected with top bracket 17 with bottom plate 1 respectively by extension spring pillar 15, use this structure can make top bracket parallel with bottom plate under off working state, still can be again to original position after long-time use.
In addition, as shown in Figure 4, top bracket 17 is also by the cylinder support plate 10 aciculiform cylinder 9 that is connected, and the piston rod part of aciculiform cylinder 9 is also fixed with a seal 11.In the time that frock cover box detects leakage point, aciculiform cylinder promotes seal and prints defective mark, and posterior maintenance is repaired riveting point.
This pick-up unit can connect one handle 221 as shown in figure 12 below bottom plate, becomes hand-held, also can be as shown in figure 13, be connected on mechanical arm 222, and control by mechanical arm.
Fig. 9 is the schematic diagram of pick-up unit docile wing outer wall 100, taking hand-held as example, first by the needle valve flow regulation on frock cover box to setting, then cover box docile is placed in to the rivet place of wing outer wall, owing to there being vernier expansion mechanism, pressing the dynamics of frock cover box and easily control, the distance by range sensor collection cover box apart from wing outer wall, in the time surveying at predetermined distance, equipment starts to detect.As shown in figure 10, the acquisition cavity of " distance 1 is to 2mm " is collected the gas leakage detecting in test zone, by the needle valve of constant flow, enters helium mass spectrometer leak detector.Start Test Switchboard, hand-held frock cover box fixed point detects 1 to 5 second, and in the time that frock cover box detects leakage point, aciculiform cylinder promotes seal and prints defective mark, and posterior maintenance is repaired riveting point.Then move to next station, detect until complete successively.
Claims (7)
1. the pick-up unit detecting for wing tank rivet impermeability, is characterized in that: comprise and lay respectively at upper and lower docile collecting mechanism and vernier expansion mechanism;
Described docile collecting mechanism comprises: be roughly cylindrical shape cover box (20), its inside is provided with sense channel, the entrance (201) of sense channel is opened in the upper surface of cover box, and the outlet of sense channel connects hydraulic quick coupler (14), needle valve (12) successively;
Described vernier expansion mechanism comprises: top bracket (17), ring flange (5) and fine setting pillar (8), wherein, cover box (20) is fixed on top bracket (17) top, and ring flange (5) is fixed on top bracket (17) below; Between ring flange (5) and top bracket (17), be arranged with a container cavity (51), ring flange (5) bottom be provided with one with container cavity (51) connect through hole, fine setting pillar (8) comprises the shaft-like body of concentric and is fixed on the hemispheric head (81) on body top, head (81) is contained in container cavity (51), clearance fit between head (81) and container cavity (51), and the spherical of head (81) is towards top bracket (17) bottom surface; Shaft-like body passes through hole and is also clearance fit between the two.
2. pick-up unit according to claim 1, is characterized in that: described cover box (20) the upper surface formation groove that caves in centered by sense channel entrance (201).
3. pick-up unit according to claim 1 and 2, is characterized in that: cover box (20) upper surface periphery is also all established multiple bulb plungers (21).
4. pick-up unit according to claim 1, is characterized in that: in top bracket (17), be also fixed with some range sensors (18) that are distributed in cover box periphery.
5. pick-up unit according to claim 1, it is characterized in that: the shaft-like body that stretches out the fine setting pillar (8) by hole overlaps successively and has press spring base (4) and rectangle stage clip (3), also include a flexible block set (2), this flexible block set (2) has a sleeve, the sealing of sleeve bottom, top end opening, sleeve sidepiece has a guiding slotted eye, the bottom of the shaft-like body of fine setting pillar (8) is stretched in sleeve and can in sleeve, be moved up and down, shaft-like body bottom is also vertically fixed with joint pin (6), relative rotation when joint pin (6) coordinates guiding slotted eye constraint fine setting pillar (8) to move up and down in sleeve.
6. pick-up unit according to claim 5, it is characterized in that: flexible block set (2) is also fixed with bottom plate (1), between bottom plate (1) and top bracket (17), centered by fine setting pillar (8), is evenly equipped with the extension spring (16) being fixedly connected with top bracket (17) with bottom plate (1) respectively by extension spring pillar (15).
7. pick-up unit according to claim 1, is characterized in that: top bracket (17) the aciculiform cylinder (9) that is also connected, the piston rod part of aciculiform cylinder (9) is also fixed with a seal (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420306838.9U CN203893998U (en) | 2014-06-10 | 2014-06-10 | Testing device for wing fuel tank rivet airtightness testing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420306838.9U CN203893998U (en) | 2014-06-10 | 2014-06-10 | Testing device for wing fuel tank rivet airtightness testing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203893998U true CN203893998U (en) | 2014-10-22 |
Family
ID=51720389
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420306838.9U Withdrawn - After Issue CN203893998U (en) | 2014-06-10 | 2014-06-10 | Testing device for wing fuel tank rivet airtightness testing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203893998U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104007024A (en) * | 2014-06-10 | 2014-08-27 | 博益(天津)气动技术研究所有限公司 | Detecting device for detecting air tightness of rivets of wing tank |
| CN107462374A (en) * | 2017-08-30 | 2017-12-12 | 宁波星箭航天机械有限公司 | Pipe joint gas leakage collection device |
-
2014
- 2014-06-10 CN CN201420306838.9U patent/CN203893998U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104007024A (en) * | 2014-06-10 | 2014-08-27 | 博益(天津)气动技术研究所有限公司 | Detecting device for detecting air tightness of rivets of wing tank |
| CN104007024B (en) * | 2014-06-10 | 2016-04-27 | 天津博益气动股份有限公司 | A kind of pick-up unit for wing tank rivet air-leakage test |
| CN107462374A (en) * | 2017-08-30 | 2017-12-12 | 宁波星箭航天机械有限公司 | Pipe joint gas leakage collection device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: TIANJIN BOYI PNEUMATIC TECHNOLOGY INSTITUTE CO., L Free format text: FORMER NAME: BOYI (TIANJIN) PNEUMATIC TECHNOLOGY INST. CO. LTD. |
|
| CP01 | Change in the name or title of a patent holder |
Address after: 300457 Tianjin Binhai New Area Development Zone No. 80 ninth street Fenghua Industrial Park No. 7 Factory Patentee after: BOYI (TIANJIN) PNEUMATIC TECHNOLOGY INSTITUTE CO., LTD. Address before: 300457 Tianjin Binhai New Area Development Zone No. 80 ninth street Fenghua Industrial Park No. 7 Factory Patentee before: Boyi (Tianjin) Pneumatic Technology Inst. Co. Ltd. |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20141022 Effective date of abandoning: 20160427 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |