CN109141752A - It is a kind of for protecting surface treatment late gate to connect the air seal test attachment device of mouth - Google Patents
It is a kind of for protecting surface treatment late gate to connect the air seal test attachment device of mouth Download PDFInfo
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- CN109141752A CN109141752A CN201810724275.8A CN201810724275A CN109141752A CN 109141752 A CN109141752 A CN 109141752A CN 201810724275 A CN201810724275 A CN 201810724275A CN 109141752 A CN109141752 A CN 109141752A
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- China
- Prior art keywords
- spiral shell
- swivel nut
- shell core
- wall
- connect
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Classifications
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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
- G01M3/025—Details with respect to the testing of engines or engine parts
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Resistance To Weather, Investigating Materials By Mechanical Methods (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
It is a kind of for protecting surface treatment late gate to connect the air seal test attachment device of mouth, be related to the important control unit protection field in rocket engine；Including spiral shell core, swivel nut and cap nut；Wherein, spiral shell core is hollow step column structure；Swivel nut is hollow step column structure；Cap nut is the hollow columnar structures that section is C-shaped；Swivel nut is fixedly set in the outer wall of spiral shell core；And it is stuck with cooperation at the step of spiral shell core at the step of swivel nut；Cap nut covers the outer wall in swivel nut from opening extreme direction；And cooperate at the open end of cap nut and the step of swivel nut stuck；Spiral shell core is connect with swivel nut by being threadedly engaged；Swivel nut is connect with cap nut by being threadedly engaged；Treated that the airtight mouth that connects of valve docks with external testing stand connector, outer surface respectively at the both ends of air seal test attachment device；The present invention effectively guarantee valve it is airtight connect nozzle surface and mouth screw thread do not connect by testing stand destroy, protect the integrality for connecing nozzle surface film layer.
Description
Technical field
The present invention relates to the important control units in rocket engine to protect field, especially a kind of for protecting at surface
Reason late gate connects the air seal test attachment device of mouth.
Background technique
Valve is the important control unit in rocket engine, quality good or not directly influence the transmitting of spacecraft at
It loses.Reliability and validity of every deck valve door before being filled to rocket engine it has to be ensured that in flight environment of vehicle, therefore valve
It must carry out airtight checkout facility and other tests.However in order to guarantee the corrosion resistance on zero parts surface of valve, part zero
Parts surface need to increase a kind of compact film, guarantee that corrosion effect does not occur between external environment, oxidant.Due to valve
When carrying out air seal test, the airtight mouth that connects of the stainless steel of testing stand is connect with the airtight mouth that connects of valve, because of friction between the two connection
So that valve is connect nozzle surface film layer local shedding with pressure, film layer is destroyed, drastically influence the corrosion resistance of part, wearability,
Insulating properties, heat resistance.Since the positive high-grade, precision and advanced direction of space product is developed, any defect is likely to result in the transmitting of rocket
There are exceptions, more even result in failure, it is therefore desirable to guarantee that every kind of part is in normal condition, meets performance requirement
State.
Summary of the invention
It is an object of the invention to overcome the above-mentioned deficiency of the prior art, provide a kind of for protecting surface treatment late gate
Connect the air seal test attachment device of mouth, it is effective guarantee valve it is airtight connect nozzle surface and mouth screw thread do not connect by testing stand destroy, protect
The integrality for connecing nozzle surface film layer is protected.
Above-mentioned purpose of the invention is achieved by following technical solution:
It is a kind of for protecting surface treatment late gate to connect the air seal test attachment device of mouth, including spiral shell core, swivel nut and housing
Nut；Wherein, spiral shell core is hollow step column structure；Swivel nut is hollow step column structure；Cap nut is to be internally provided with
The hollow columnar structures of groove；Swivel nut is fixedly set in the outer wall of spiral shell core；And cooperate at the step of swivel nut at the step of spiral shell core
It is stuck；Cap nut covers the outer wall in swivel nut from opening extreme direction；And cooperate at the open end of cap nut and the step of swivel nut
It is stuck.
Above-mentioned a kind of for protecting surface treatment late gate to connect the air seal test attachment device of mouth, the spiral shell core
Axial inner wall is provided with internal screw thread；The axial outer wall of spiral shell core is provided with external screw thread；The axial inner wall of swivel nut is provided with internal screw thread；Spiral shell
Core is connect with swivel nut by being threadedly engaged；The axial outer wall of swivel nut is provided with external screw thread；The axial inner wall of cap nut is provided with
Internal screw thread；Swivel nut is connect with cap nut by being threadedly engaged；One end of air seal test attachment device passes through the internal screw thread of spiral shell core
It is docked with external testing stand connector；After internal screw thread and the outer surface processing that the other end of air seal test attachment device passes through spiral shell core
Valve it is airtight connect mouth docking.
Above-mentioned a kind of for protecting surface treatment late gate to connect the air seal test attachment device of mouth, the spiral shell core is used
Nylon material.
Above-mentioned a kind of for protecting surface treatment late gate to connect the air seal test attachment device of mouth, the spiral shell outer core
Nominal diameter r1 is 20mm；External screw thread screw pitch is 1.5mm on spiral shell outer core；External screw thread axial length L 1 is on spiral shell outer core
10.45-10.55mm；Diameter r2 is 12.9-13mm at spiral shell core step；Axial length L 2 is 3.45-3.55mm at spiral shell core step；
Spiral shell in-core wall nominal diameter r3 is 12mm；The upper internal screw thread screw pitch of Luo Xinneibi is 1.25mm.
Above-mentioned a kind of for protecting surface treatment late gate to connect the air seal test attachment device of mouth, the swivel nut and outer
Set nut is all made of stainless steel 2Cr13 material.
Above-mentioned a kind of for protecting surface treatment late gate to connect the air seal test attachment device of mouth, the air seal test
It is 2-23MPa that attachment device, which bears gas pressure ability,.
Above-mentioned a kind of for protecting surface treatment late gate to connect the air seal test attachment device of mouth, the swivel nut outer wall
Nominal diameter r4 is 27mm；External screw thread screw pitch is 1.5mm on swivel nut outer wall；Swivel nut outer wall axial length L 3 is 9.95-
10.05mm；Be positive hexagonal shape at swivel nut step；Axial length L 4 is 3mm at swivel nut step；Swivel nut inner wall nominal diameter r5
For 20mm；Internal screw thread screw pitch is 1.5mm on swivel nut inner wall.
Above-mentioned a kind of for protecting surface treatment late gate to connect the air seal test attachment device of mouth, the cap nut
Axial length L 5 is 13mm；Cap nut outer diameter is 32.5mm；Axial direction groove length L6 is 9.5mm inside cap nut；Housing
Nut axial direction groove inner wall nominal diameter r6 is 27mm；Cap nut axial notch inner wall internal screw thread screw pitch is 1.5mm.
Above-mentioned a kind of for protecting surface treatment late gate to connect the air seal test attachment device of mouth, the axis of the spiral shell core
Swivel nut axial end face is stretched out to two end faces；Overhang is 0.5mm；When air seal test attachment device and external valve connect mouth
When docking, sealing is realized in nylon spiral shell core extension deformation；When air seal test attachment device is docked with external testing stand connector
When, spiral shell core extension deformation, swivel nut axial direction one end is contacted with cap nut inner bottom surface, realizes sealing.
The invention has the following advantages over the prior art:
(1) present invention connects mouth using nylon spiral shell core connecting valve is airtight, efficiently solves traditional approach using stainless steel
Material causes valve is airtight to connect the phenomenon that mouth film layer is destroyed as air-tight connection tooling, prevents from being damaged because of piece surface film layer
Badly valve is caused to be scrapped；
(2) present invention wraps up stainless steel swivel nut and cap nut outside nylon spiral shell core, effectively improve gas check with
Valve connects mouth and testing stand connects the bonding strength between mouth, keeps air seal test process stable, reliable and safe.
Detailed description of the invention
Fig. 1 is air seal test attachment device schematic diagram of the present invention；
Fig. 2 is spiral shell core scale diagrams of the present invention；
Fig. 3 is swivel nut scale diagrams of the present invention；
Fig. 4 is cap nut scale diagrams of the present invention.
Specific embodiment
The present invention is described in further detail in the following with reference to the drawings and specific embodiments:
The present invention provides a kind of for protecting surface treatment late gate to connect the air seal test attachment device of mouth, can effectively protect
Card valve, which connects nozzle surface and do not connect mouth screw thread by test, to be destroyed, and the integrality for connecing nozzle surface film layer is protected.
It is as shown in Figure 1 air seal test attachment device schematic diagram, as seen from the figure, one kind is for protecting surface treatment late gate
Connect the air seal test attachment device of mouth, including spiral shell core 1, swivel nut 2 and cap nut 3；Wherein, spiral shell core 1 is hollow step column knot
Structure；Swivel nut 2 is hollow step column structure；Cap nut 3 is that section is the hollow columnar structures for being internally provided with groove；Swivel nut
2 are fixedly set in the outer wall of spiral shell core 1；And it is stuck with cooperation at the step of spiral shell core 1 at the step of swivel nut 2；Cap nut 3 is from opening
Extreme direction covers the outer wall in swivel nut 2；And the open end of cap nut 3 and cooperation at the step of swivel nut 2 are stuck.Wherein, spiral shell core 1 is adopted
With nylon material, it is nonmetallic materials, there is flexible and toughness, avoids damage to airtight connect mouth film layer.Swivel nut 2 and cap nut 3
Be all made of stainless steel 2Cr13 material, make device have some strength, can satisfy the gas pressure of 2MPa-23MPa, not by
It destroys.
Wherein, the axial inner wall of spiral shell core 1 is provided with internal screw thread；The axial outer wall of spiral shell core 1 is provided with external screw thread；Swivel nut 2
Axial inner wall is provided with internal screw thread；Spiral shell core 1 is connect with swivel nut 2 by being threadedly engaged；The axial outer wall of swivel nut 2 is provided with outer spiral shell
Line；The axial inner wall of cap nut 3 is provided with internal screw thread；Swivel nut 2 is connect with cap nut 3 by being threadedly engaged；Air seal test
It is docked by the internal screw thread of spiral shell core 1 with external testing stand connector one end of attachment device；The other end of air seal test attachment device
By the internal screw thread of spiral shell core 1 and outer surface, treated that the airtight mouth that connects of valve docks.
Spiral shell core scale diagrams are illustrated in figure 2, as seen from the figure, the 1 outer wall nominal diameter r1 of spiral shell core is 20mm；Spiral shell core
External screw thread screw pitch is 1.5mm on 1 outer wall；External screw thread axial length L 1 is 10.45-10.55mm on 1 outer wall of spiral shell core；1 step of spiral shell core
Place diameter r2 is 12.9-13mm；Axial length L 2 is 3.45-3.55mm at 1 step of spiral shell core；1 inner wall nominal diameter r3 of spiral shell core is
12mm；Internal screw thread screw pitch is 1.25mm on 1 inner wall of spiral shell core.
Swivel nut scale diagrams of the present invention are illustrated in figure 3, as seen from the figure, the 2 outer wall nominal diameter r4 of swivel nut is
27mm；External screw thread screw pitch is 1.5mm on 2 outer wall of swivel nut；2 outer wall axial length L 3 of swivel nut is 9.95-10.05mm；2 step of swivel nut
Place is positive hexagonal shape；Axial length L 4 is 3mm at 2 step of swivel nut；2 inner wall nominal diameter r5 of swivel nut is 20mm；In swivel nut 2
Internal screw thread screw pitch is 1.5mm on wall.
Cap nut scale diagrams are illustrated in figure 4, as seen from the figure, 3 axial length L 5 of cap nut is 13mm；Housing
3 outer diameter of nut is 32.5mm；3 inside axial direction groove length L6 of cap nut is 9.5mm；3 axial notch inner wall of cap nut is public
Diameter r6 is referred to as 27mm；3 axial notch inner wall internal screw thread screw pitch of cap nut is 1.5mm.
2 axial end face of swivel nut is stretched out in axial two end faces of spiral shell core 1；Overhang is 0.5mm；When air seal test connects
When device connects mouth with external valve and docks, sealing is realized in the 1 extension deformation of nylon spiral shell core；Guarantee attachment device and external valve
Door connects No leakage risk between mouth.When air seal test attachment device is docked with external testing stand connector, in assembly and housing
After nut 3 connects, it can guarantee the gap between end face there are 0.5mm, can guarantee 1 protruding parts of nylon spiral shell core when tightening
Deformation occurs, and forms sealing structure, guarantees that attachment device and testing stand connect No leakage risk between mouth.1 extension of spiral shell core
Deformation, the axial one end of swivel nut 2 are contacted with 3 inner bottom surface of cap nut, realize sealing.
Stating air seal test attachment device and bearing gas pressure ability is 2-23MPa.
Mouth is connect present invention employs nylon spiral shell 1 connecting valve of core is airtight, efficiently solves traditional approach using stainless steel
Material causes valve is airtight to connect the phenomenon that mouth film layer is destroyed as air-tight connection tooling, prevents from being damaged because of piece surface film layer
Badly valve is caused to be scrapped.Stainless steel swivel nut 2 and cap nut 3 are wrapped up outside nylon spiral shell core 1 simultaneously, is effectively improved airtight
Device and valve connect mouth and testing stand connects the bonding strength between mouth, keep air seal test process stable, reliable and safe.
The content that description in the present invention is not described in detail belongs to the well-known technique of those skilled in the art.
Claims (9)
1. a kind of for protecting surface treatment late gate to connect the air seal test attachment device of mouth, it is characterised in that: including spiral shell core
(1), swivel nut (2) and cap nut (3)；Wherein, spiral shell core (1) is hollow step column structure；Swivel nut (2) is hollow step column
Structure；Cap nut (3) is that section is the hollow columnar structures for being internally provided with groove；Swivel nut (2) is fixedly set in spiral shell core (1)
Outer wall；And it is stuck with cooperation at the step of spiral shell core (1) at the step of swivel nut (2)；Cap nut (3) is covered from opening extreme direction
The outer wall of swivel nut (2)；And the open end of cap nut (3) and cooperation at the step of swivel nut (2) are stuck.
2. it is according to claim 1 a kind of for protecting surface treatment late gate to connect the air seal test attachment device of mouth,
Be characterized in that: the axial inner wall of the spiral shell core (1) is provided with internal screw thread；The axial outer wall of spiral shell core (1) is provided with external screw thread；Spiral shell
The axial inner wall of set (2) is provided with internal screw thread；Spiral shell core (1) is connect with swivel nut (2) by being threadedly engaged；The axis of swivel nut (2) is outside
Wall is provided with external screw thread；The axial inner wall of cap nut (3) is provided with internal screw thread；Swivel nut (2) and cap nut (3) pass through screw thread
It is cooperatively connected；It is docked by the internal screw thread of spiral shell core (1) with external testing stand connector one end of air seal test attachment device；Airtight examination
Testing the other end of attachment device, treated that the airtight mouth that connects of valve docks by the internal screw thread of spiral shell core (1) and outer surface.
3. it is according to claim 2 a kind of for protecting surface treatment late gate to connect the air seal test attachment device of mouth,
Be characterized in that: the spiral shell core (1) uses nylon material.
4. it is according to claim 3 a kind of for protecting surface treatment late gate to connect the air seal test attachment device of mouth,
Be characterized in that: spiral shell core (1) the outer wall nominal diameter r1 is 20mm；External screw thread screw pitch is 1.5mm on spiral shell core (1) outer wall；Spiral shell core
(1) external screw thread axial length L 1 is 10.45-10.55mm on outer wall；Diameter r2 is 12.9-13mm at spiral shell core (1) step；Spiral shell core
(1) axial length L 2 is 3.45-3.55mm at step；Spiral shell core (1) inner wall nominal diameter r3 is 12mm；In on spiral shell core (1) inner wall
Thread pitch is 1.25mm.
5. it is according to claim 4 a kind of for protecting surface treatment late gate to connect the air seal test attachment device of mouth,
Be characterized in that: the swivel nut (2) and cap nut (3) are all made of stainless steel 2Cr13 material.
6. it is according to claim 5 a kind of for protecting surface treatment late gate to connect the air seal test attachment device of mouth,
Be characterized in that: it is 2-23MPa that the air seal test attachment device, which bears gas pressure ability,.
7. it is according to claim 6 a kind of for protecting surface treatment late gate to connect the air seal test attachment device of mouth,
Be characterized in that: swivel nut (2) the outer wall nominal diameter r4 is 27mm；External screw thread screw pitch is 1.5mm on swivel nut (2) outer wall；Swivel nut
(2) outer wall axial length L 3 is 9.95-10.05mm；Be positive hexagonal shape at swivel nut (2) step；It is axial at swivel nut (2) step
Length L4 is 3mm；Swivel nut (2) inner wall nominal diameter r5 is 20mm；Internal screw thread screw pitch is 1.5mm on swivel nut (2) inner wall.
8. it is according to claim 7 a kind of for protecting surface treatment late gate to connect the air seal test attachment device of mouth,
Be characterized in that: cap nut (3) axial length L 5 is 13mm；Cap nut (3) outer diameter is 32.5mm；Cap nut (3)
Inside axial direction groove length L6 is 9.5mm；Cap nut (3) axial notch inner wall nominal diameter r6 is 27mm；Cap nut (3)
Axial notch inner wall internal screw thread screw pitch is 1.5mm.
9. it is according to claim 8 a kind of for protecting surface treatment late gate to connect the air seal test attachment device of mouth,
Be characterized in that: swivel nut (2) axial end face is stretched out in axial two end faces of the spiral shell core (1)；Overhang is 0.5mm；Work as gas
When close test connecting device connects mouth with external valve and docks, sealing is realized in nylon spiral shell core (1) extension deformation；When airtight examination
When testing attachment device and dock with external testing stand connector, spiral shell core (1) extension deformation, swivel nut (2) axial direction one end and housing spiral shell
Female (3) inner bottom surface contact, realizes sealing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810724275.8A CN109141752B (en) | 2018-07-04 | 2018-07-04 | Air-tight test connecting device for protecting valve nozzle after surface treatment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810724275.8A CN109141752B (en) | 2018-07-04 | 2018-07-04 | Air-tight test connecting device for protecting valve nozzle after surface treatment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109141752A true CN109141752A (en) | 2019-01-04 |
| CN109141752B CN109141752B (en) | 2021-01-12 |
Family
ID=64799930
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810724275.8A Active CN109141752B (en) | 2018-07-04 | 2018-07-04 | Air-tight test connecting device for protecting valve nozzle after surface treatment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109141752B (en) |
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|---|---|---|---|---|
| CN101348220A (en) * | 2007-09-07 | 2009-01-21 | 富阳通力机械制造有限公司 | Electric top spiral spoke nut |
| CN201322150Y (en) * | 2008-12-06 | 2009-10-07 | 湖北航天技术研究院总体设计所 | A cap nut |
| CN202250507U (en) * | 2011-09-28 | 2012-05-30 | 常州常瑞天力动力机械有限公司 | Low-pressure oil pipe assembly for diesel engine |
| CN203463833U (en) * | 2013-09-27 | 2014-03-05 | 湖北航天技术研究院总体设计所 | Sealing assembly for butt-joint of high-temperature high-pressure gas pipelines |
| KR20140129869A (en) * | 2013-04-30 | 2014-11-07 | 주식회사 세광하이테크 | Swivel joint |
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| CN205136872U (en) * | 2015-10-19 | 2016-04-06 | 西安航空动力股份有限公司 | Experimental flexible joint that uses |
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-
2018
- 2018-07-04 CN CN201810724275.8A patent/CN109141752B/en active Active
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| CN101348220A (en) * | 2007-09-07 | 2009-01-21 | 富阳通力机械制造有限公司 | Electric top spiral spoke nut |
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| CN204330229U (en) * | 2015-01-06 | 2015-05-13 | 湖北三江航天红阳机电有限公司 | Pressure test pipeline transfer tube |
| CN106594415A (en) * | 2015-10-15 | 2017-04-26 | 陕西重型汽车有限公司 | Conveniently-screwed type combined connector, use method of conveniently-screwed type combined connector and connecting device for air pipeline and valve |
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| CN109141752B (en) | 2021-01-12 |
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