CN107515134A - The stagnant sealing structure of spiral grid type anti-sticking - Google Patents
The stagnant sealing structure of spiral grid type anti-sticking Download PDFInfo
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- CN107515134A CN107515134A CN201710942326.XA CN201710942326A CN107515134A CN 107515134 A CN107515134 A CN 107515134A CN 201710942326 A CN201710942326 A CN 201710942326A CN 107515134 A CN107515134 A CN 107515134A
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- drill head
- core drill
- head end
- protection tube
- outer protection
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/04—Devices for withdrawing samples in the solid state, e.g. by cutting
- G01N1/08—Devices for withdrawing samples in the solid state, e.g. by cutting involving an extracting tool, e.g. core bit
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- Life Sciences & Earth Sciences (AREA)
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- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Earth Drilling (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The stagnant sealing structure of spiral grid type anti-sticking, belongs to Sample acquisition field.It provides a kind of sealing function interface for being not required to add seal, and it is directed to the turning-sliding pair operating mode that can not be fully sealed.Core drill head end is hollow structure, sampling outer protection tube shaft end is provided with core drill head end, core drill head end is slidably matched with sampling outer protection tube end play, the sampling outer protection tube shaft end outer surface is threaded, the core drill head end inner surface is machined with groove and forms grid, or core drill head end inner surface is machined with annular knurl.The present invention has the advantages that being not required to add seal, sealing characteristics are good, environmental suitability is strong, seal clearance is insensitive compared with conventional seals form.The present invention can not only greatly improve probing security, avoid project failure from causing a large amount of economic losses.
Description
Technical field
The invention belongs to Sample acquisition field, more particularly to a kind of stagnant sealing structure of spiral grid type anti-sticking.
Background technology
With earth resource excess load develop, environmental pollution, scarcity of resources, the energy appreciate the problems such as be difficult to solve, how
Obtain, become using new energy run into human history it is most severe the problem of.Early in mid-twentieth century, the Soviet Union of the U.S. is just
It was found that possessing a large amount of available resources, especially helium -3 on the moon, the energy can be used as pollution-free nuclear fusion fuel and the earth stores up
Amount is few, based on sustainable development and economy condition, probe into the moon, development that lunar soil is gathered to China it is necessary.
China had not realized that full-automatic star earth drilled through sampling work completely at present, and this is obtained to lunar soil resource information, resource analysis is produced
Great difficulty is given birth to.The phase of China Lunar Exploration Program three set up the project in 2011, and target is to realize that the unmanned sampling of lunar surface returns.Wherein obtain
The research of the drilling tool rotary-percussion drilling method of ortho states lunar soil is the important composition of current beforehand research, is drilled in ground simulation lunar soil
Find that clearance type be present between coring bit and sampling outer protection tube is slidably matched in journey（I.e. relative revolution relatively moves again）.By
During drilling down to, certain internal pressure always be present in lunar soil bulk solid body, cause a soil stream part to sampling outer protection tube
Gap between drill bit is occupied, and is sampled outer protection tube and carried out vibration up and down, and soil block, which can pass through, periodically to be extruded, in this process
In have soil particle into gap cause turn round clamping stagnation, stuck phenomenon.If drilling through sampling mechanism failure, directly affect whole
The success or failure of individual task, cause a large amount of economic losses.Because the sampling mechanism of national independent development has certain gap with foreign countries, drill through
Operating mode also has difference, therefore on the premise of analyzing domestic and international Similar Problems and having no solution, basic proposition is made as with trepan
New function interface --- the stagnant sealing structure of spiral grid type anti-sticking.The purpose is to it is endless it is hermetically sealed on the premise of pass through function
The dynamic chip removal function at interface alleviates gap and enters native phenomenon, and strict guarantee clamping stagnation stuck phenomenon is not sent out within certain working time
It is raw.The function interface can be expanded to other turning-sliding pair operating modes.
The content of the invention
In order to solve the problems, such as that technical background is present, it is not required to add the close of seal it is an object of the invention to provide a kind of
Envelope function interface, it is directed to the turning-sliding pair operating mode that can not be fully sealed.
The technical solution used in the present invention is：The stagnant sealing structure of spiral grid type anti-sticking, including：Sample outer protection tube shaft end
Be provided with sampling outer protection tube shaft end and core drill head end, core drill head end are hollow structure, in core drill head end, core drill head end with
Sampling outer protection tube end play is slidably matched, and the sampling outer protection tube shaft end outer surface is threaded, the core drill head end
Inner surface is machined with groove and forms grid, or core drill head end inner surface is machined with annular knurl.
The beneficial effects of the present invention are：
It is not required to add seal 1. the present invention has compared with conventional seals form, sealing characteristics are good, environmental suitability is strong, close
Seal the advantages that gap is insensitive.Therefore, it is stuck can to reduce turning-sliding pair clamping stagnation in lunar soil drilling process for one aspect of the present invention
Probability；On the other hand, it is not required to propose quality requirement again when spacecraft carries, the present invention can not only greatly improve probing safety
Property, avoid project failure from causing a large amount of economic losses.
2. the present invention has excellent sealing characteristics, core drill head end and the shallow slot bull of sampling outer protection tube shaft end outer surface
Rectangular thread is relative to turn round, and can apply downward extruding force to soil stream or single soil particle in real time, with reference to turning course
Middle soil particle interphase interaction, intrusion particle is all discharged into rotary sealing region, reaches approximately positive confinement.
3. certain interval be present between the shallow slot bull rectangular thread and grid or knurled portion of the present invention（Compared with conventional seals
Greatly）, when entering bulky grain dust in gap, clamping stagnation, stuck phenomenon are not present in principle.And the sealing of spiral knurl type can provide
Instant reversal safeguard measure, prevent reversion from producing ill effect.
4. relatively good sealing state can be achieved only under the conditions of certain interval using conventional seals, and between once changing
Gap seal parameters, sealing effectiveness, which will decline to a great extent, can not meet technical requirements.And TRANSIENT HIGH TEMPERATURE caused by drilling tool due to can not and
When spreading, sampling outer protection tube can be made to produce heat expansion and change gap value, it is stuck to occur clamping stagnation, when coring bit end pieces have one
When determining frequency oscillation causes to sample outer protection tube shaft end and core drill head end not to heart change gap value, spiral grid type anti-sticking is stagnant close
The insensitive characteristic in gap having is sealed, can be that the certain guarantee of offer is provided.
Brief description of the drawings
Fig. 1：Front view of the present invention；
Fig. 2：Fig. 1 sampling outer protection tube shaft end structural representation；
Fig. 3：Fig. 1 coring bit end structure schematic diagram；
Fig. 4：Soil flow regime figure during present invention work；
Wherein：1- sampling outer protection tubes shaft end；2- core drill head ends.
Embodiment
As shown in Fig. 1 ~ Fig. 4, the stagnant sealing structure of spiral grid type anti-sticking, including：Sample outer protection tube shaft end 1 and coring bit
End 2, core drill head end 2 are hollow structure, and sampling outer protection tube shaft end 1, core drill head end 2 and sampling are provided with core drill head end 2
The clearance sliding fit of outer protection tube shaft end 1, the outer surface of sampling outer protection tube shaft end 1 is threaded, in the core drill head end 2
Surface Machining has groove to form grid, or the inner surface of core drill head end 2 is machined with annular knurl.
Between the Major Diam of the outer surface of probe tube outer protection tube shaft end 1 and the grid internal diameter of the inner surface of core drill head end 2
Leave 0.05-0.2mm gap, or the Major Diam of the outer surface of probe tube outer protection tube shaft end 1 and the inner surface of core drill head end 2
Annular knurl internal diameter between leave 0.05-0.2mm gap.
The screw thread of the outer surface of probe tube outer protection tube shaft end 1 processing is shallow slot bull rectangular thread.
The groove depth of the shallow slot bull rectangular thread is 0.1-0.5mm.
The groove depth and gap-ratio are between 2-5, and wherein groove depth and gap-ratio are preferably 0.7, groove depth 0.2-0.35mm；
The grid lattice depth of the core drill head end 2 is 0.1-0.5mm.
The inner surface of core drill head end 2 must Wear-resistant Treatment and surface roughness Ra below 3.2.
The shallow slot bull rectangular thread of the outer surface of outer protection tube shaft end 1 is sampled, different Operating condition adjustment numbers of starts, spiral shell need to be directed to
The parameters such as line helical pitch, groove depth, groove width ratio, angle of groove inclination, the purpose is to provide transport channel of the soil particle in seal clearance.
The grid or annular knurl of core drill head end 2 make the rough inner surface of core drill head end 2 and gap endoparticle can be produced
Drive the result, and then realize dynamic casting function.Its variable technique parameter has：Raster width, grid quantity, grid depth（Grid
Lattice）Or annular knurl modulus（Annular knurl type）.
The present invention is applied to the mechanism of shaft hole matching, is the turning-sliding pair in drilling operation particularly mainly for operating mode
Operating mode, i.e., the sampling outer protection tube shaft end 1 at shaft hole matching are periodic vibration（Soil mobility is larger and has internal pressure）It is or fixed
Do not move, the motion of core drill head end 2 is unidirectional pure gyration, is also suitable for instant reversal operating mode.
The core drill head end 2 that is found through experiments that grid type is easy to process, precision is relatively easy to control, and the core drill of annular knurl type
The using effect of head end 2 is preferable and is suitable for reversing damped condition of taking advantage of a situation, and can guarantee that more excellent sealing state., must be first right for different operating modes
Annular knurl type and the surface of grid type core drill head end 2 are selected, the suitable helix parameter of reselection and grid/annular knurl parameter.
Drilled through in No. five lunar soil of the goddess in the moon and employ this hair between the drill bit of mechanism ground decoupling experiment exemplar and internal pillar
The bright stagnant sealing structure of spiral grid type anti-sticking, its testpieces are as shown in Figure 2.
To ensure clamping stagnation stuck phenomenon does not occur in lunar exploration drilling operation, coring bit and sampling outer protection tube gap are carried out
The decoupling type for having certain soil pressure is tested, and is made as basis with trepan, is passed through the association to drilling through outside casting, it is proposed that close
Seal and dynamic soil chip removal stream is produced in gap, and then similar positive confinement effect.Simultaneously because the generation of chip removal stream
The limitation to gap width is relaxed, allows the gap width in the stagnant sealing structure of spiral grid type anti-sticking of new-type invention than tradition
Seal clearance is big, and can well adapt to caused by being influenceed due to vibration, internal stress factor not to the heart.
, can be obvious by the technical parameter of the stagnant sealing structure of spiral grid type anti-sticking of a series of experiments adjustment present invention
Improve the clamping stagnation stuck phenomenon of drilling operation and leakage soil amount is also limited in certain tolerance interval.One group of rational technology ginseng
Number such as following table：
Table organizes the stagnant sealing structure technical parameter of rational spiral grid anti-sticking one by one
| Lead | Number of starts | Screw thread groove depth | Lead angle | Screw thread section length | Annular knurl modulus |
| 8mm | 6 | 0.2mm | 20° | 8mm | 0.5mm |
The preferred embodiments of the present invention are the foregoing is only, are not intended to limit the invention, for those skilled in the art
For member, the present invention can have various modifications and variations.Any modification within the spirit and principles of the invention, being made,
Equivalent substitution, improvement etc., should be included in the scope of the protection.
Claims (5)
1. a kind of stagnant sealing structure of spiral grid type anti-sticking, including：Sample outer protection tube shaft end（1）And core drill head end（2）, coring
Drill bit（2）For hollow structure, core drill head end（2）It is interior to be provided with sampling outer protection tube shaft end（1）, core drill head end（2）With sampling
Outer protection tube shaft end（1）Clearance sliding fit, it is characterised in that：The sampling outer protection tube shaft end（1）Outer surface is threaded, institute
State core drill head end（2）Inner surface is machined with groove and forms grid, or core drill head end（2）Inner surface is machined with annular knurl.
2. the stagnant sealing structure of spiral grid type anti-sticking according to claim 1, it is characterised in that：The probe tube outer protection tube
Shaft end（1）The Major Diam of outer surface and core drill head end（2）0.05-0.2mm gap is left between the grid internal diameter of inner surface,
Or probe tube outer protection tube shaft end（1）The Major Diam of outer surface and core drill head end（2）Left between the annular knurl internal diameter of inner surface
0.05-0.2mm gap.
3. the stagnant sealing structure of spiral grid type anti-sticking according to claim 1, it is characterised in that：The probe tube outer protection tube
Shaft end（1）The screw thread of outer surface processing is shallow slot bull rectangular thread.
4. the stagnant sealing structure of spiral grid type anti-sticking according to claim 3, it is characterised in that：The shallow slot bull rectangle
The groove depth of screw thread is 0.1-0.5mm.
5. the stagnant sealing structure of spiral grid type anti-sticking according to claim 1, it is characterised in that：The core drill head end
（2）Grid lattice depth be 0.1-0.5mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710942326.XA CN107515134B (en) | 2017-10-11 | 2017-10-11 | Spiral grid type anti-clamping stagnation sealing structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710942326.XA CN107515134B (en) | 2017-10-11 | 2017-10-11 | Spiral grid type anti-clamping stagnation sealing structure |
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| Publication Number | Publication Date |
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| CN107515134A true CN107515134A (en) | 2017-12-26 |
| CN107515134B CN107515134B (en) | 2020-08-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710942326.XA Active CN107515134B (en) | 2017-10-11 | 2017-10-11 | Spiral grid type anti-clamping stagnation sealing structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109261378A (en) * | 2018-11-20 | 2019-01-25 | 中国工程物理研究院总体工程研究所 | Large high-speed geotechnical centrifuge main shaft movable sealing structure |
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| CN101694424A (en) * | 2009-10-13 | 2010-04-14 | 武汉地大长江钻头有限公司 | Moon lunar soil shallow layer drilling and coring method |
| CN102116710A (en) * | 2011-02-24 | 2011-07-06 | 武汉地大长江钻头有限公司 | Device for drilling and coring lunar soil in moon outside hole |
| CN202075148U (en) * | 2011-05-03 | 2011-12-14 | 中国地质大学（武汉） | Grid adaptive attitude adjusting drum type collector |
| CN102735494A (en) * | 2012-07-19 | 2012-10-17 | 哈尔滨工业大学 | Spiral-gathering type moon-surface sample collecting and packaging device |
| CN102852461A (en) * | 2012-09-25 | 2013-01-02 | 哈尔滨工业大学 | Core drilling drill with barrier crushing and chip-discharge functions |
| CN103662686A (en) * | 2013-12-02 | 2014-03-26 | 北京交通大学 | Improvement method for shaftless screw conveyor |
| CN105699195A (en) * | 2016-01-28 | 2016-06-22 | 铁道第三勘察设计院集团有限公司 | Screw plate deep load test system based on geotechnical engineering in-situ rotating touch detector and use method thereof |
| CN107124939A (en) * | 2017-06-28 | 2017-09-05 | 重庆科技学院 | Integral type Drilling-hole seeder |
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2017
- 2017-10-11 CN CN201710942326.XA patent/CN107515134B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101694424A (en) * | 2009-10-13 | 2010-04-14 | 武汉地大长江钻头有限公司 | Moon lunar soil shallow layer drilling and coring method |
| CN102116710A (en) * | 2011-02-24 | 2011-07-06 | 武汉地大长江钻头有限公司 | Device for drilling and coring lunar soil in moon outside hole |
| CN202075148U (en) * | 2011-05-03 | 2011-12-14 | 中国地质大学（武汉） | Grid adaptive attitude adjusting drum type collector |
| CN102735494A (en) * | 2012-07-19 | 2012-10-17 | 哈尔滨工业大学 | Spiral-gathering type moon-surface sample collecting and packaging device |
| CN102852461A (en) * | 2012-09-25 | 2013-01-02 | 哈尔滨工业大学 | Core drilling drill with barrier crushing and chip-discharge functions |
| CN103662686A (en) * | 2013-12-02 | 2014-03-26 | 北京交通大学 | Improvement method for shaftless screw conveyor |
| CN105699195A (en) * | 2016-01-28 | 2016-06-22 | 铁道第三勘察设计院集团有限公司 | Screw plate deep load test system based on geotechnical engineering in-situ rotating touch detector and use method thereof |
| CN107124939A (en) * | 2017-06-28 | 2017-09-05 | 重庆科技学院 | Integral type Drilling-hole seeder |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109261378A (en) * | 2018-11-20 | 2019-01-25 | 中国工程物理研究院总体工程研究所 | Large high-speed geotechnical centrifuge main shaft movable sealing structure |
| CN109261378B (en) * | 2018-11-20 | 2023-12-22 | 中国工程物理研究院总体工程研究所 | Main shaft dynamic sealing structure of large-scale high-speed geotechnical centrifuge |
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| Publication number | Publication date |
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| CN107515134B (en) | 2020-08-28 |
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