CN104279385A - Rotating joint with high sealing property - Google Patents
Rotating joint with high sealing property Download PDFInfo
- Publication number
- CN104279385A CN104279385A CN201410395636.0A CN201410395636A CN104279385A CN 104279385 A CN104279385 A CN 104279385A CN 201410395636 A CN201410395636 A CN 201410395636A CN 104279385 A CN104279385 A CN 104279385A
- Authority
- CN
- China
- Prior art keywords
- ring
- sealing
- axle sleeve
- pull bar
- rotating shaft
- 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.)
- Granted
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L27/00—Adjustable joints, Joints allowing movement
- F16L27/08—Adjustable joints, Joints allowing movement allowing adjustment or movement only about the axis of one pipe
- F16L27/0804—Adjustable joints, Joints allowing movement allowing adjustment or movement only about the axis of one pipe the fluid passing axially from one joint element to another
- F16L27/0808—Adjustable joints, Joints allowing movement allowing adjustment or movement only about the axis of one pipe the fluid passing axially from one joint element to another the joint elements extending coaxially for some distance from their point of separation
- F16L27/0824—Adjustable joints, Joints allowing movement allowing adjustment or movement only about the axis of one pipe the fluid passing axially from one joint element to another the joint elements extending coaxially for some distance from their point of separation with ball or roller bearings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
- F16J15/3204—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
- F16J15/3204—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip
- F16J15/3208—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip provided with tension elements, e.g. elastic rings
Abstract
The invention relates to the technical field of a rotating joint and discloses the rotating joint with high sealing property. The rotating joint comprises a hollow rotating shaft and a shaft sleeve, wherein an end cover is arranged at one end of the shaft sleeve; a connecting head is arranged at the other end of the shaft sleeve; a bearing is arranged between the hollow rotating shaft and the shaft sleeve; a framework sealing ring is also arranged between the hollow rotating shaft and the shaft sleeve and comprises a framework and a sealing ring body; the inner ring of the sealing ring body extends to form two parallel sealing lip openings; a sealing conical surface is arranged on the inner ring of the outer side surface of each sealing lip opening; an annular groove is formed in the outer wall of the hollow rotating shaft; the two side surfaces of the annular groove are conical surfaces attached to the sealing conical surfaces; clearances are formed between the inner rings of the sealing lip openings and the groove bottom of the annular groove; a spring compressing ring sleeves the outer ring of each sealing lip opening; a plurality of elastic supporting components are uniformly arranged between the inner side surfaces of the two sealing lip openings. Therefore, the rotating joint has the beneficial effects of capability of automatically compensating for abrasion, high sealing property and long service life.
Description
Technical field
The present invention relates to swivel joint technical field, particularly relate to a kind of high leak tightness swivel joint.
Background technique
At present, in industries such as metallurgy, boats and ships lifting, chemical industry, pharmacy, in the rigid conduit of conveying high-pressure fluid, need between two pipelines swivel joint is installed in relative rotation, swivel joint generally comprises hollow shaft, axle sleeve, a connecting head, and connecting head is connected with fixing pipeline, and hollow shaft is connected with the pipeline of rotation, hollow shaft rotates in axle sleeve, thus realizes the connection of rotated pipe and fixing tube.Due to hollow shaft high speed rotating, high-pressure liquid is carried in hollow shaft, leak to prevent fluid between hollow shaft and axle sleeve, between hollow shaft periphery and axle sleeve, seal ring is installed, hollow shaft high speed rotating, seal ring is easy to wearing and tearing, and rotated pipe in rotation process to bringing vibration, thus cause there is axial runout between hollow shaft and axle sleeve, this can aggravate again the wearing and tearing of seal ring, so just cause will changing swivel joint at set intervals or changing seal ring, and long-time through-flow body in general high voltage fluid line, changing swivel joint just must stop fluid flowing, various equipment all needs to suspend, therefore the sealing between hollow shaft and axle sleeve how is improved, slow down ring wear, improve the Focal point and difficult point that swivel joint is swivel design working life.
Such as: Chinese patent Authorization Notice No.: CN201288908Y, authorized announcement date on August 12nd, 2009, disclose a kind of rigid rotating joint, comprise the static hollow casing that is connected with nested structure with quill shaft and relatively rotate hollow casing, cover inwall has step, there is lip backbone sealing ring this step end face and quill shaft end face joint, and wherein support frame used is cylindrically coiled spring ring, and cylindrically coiled spring ring is by banded reed coiling.When lip backbone sealing ring inner ring weares and teares, by the circumferential pressure of cylindrically coiled spring ring, the inner ring of lip backbone sealing ring is fitted with hollow rotating shaft outer side wall all the time, thus remains sealing, add the working life of seal ring.The inner ring lip wear extent that the seal ring of this kind of structure allows is larger, if seal failure after conventional seals circle inner ring wearing and tearing 1mm, even and if lip backbone sealing ring inner ring lip wearing and tearing 3mm also can keep fitting with hollow rotating shaft outer wall, but just bring new problem like this, because seal ring inner ring lip wear extent increases to a certain degree, interior circumference and the outer circumference difference of hollow rotating shaft can be caused to increase, and in order to ensure ring wear resistant, the seal ring hardness that swivel joint inner seal ring its rigidity connects far above static state, therefore seal ring its inner ring local under the compression of cylindrically coiled spring ring brute force can be caused when girth difference is larger to crease easily, thus cause oil liquid leakage, and under the effect of spring shackle, there is certain torsion during the wearing and tearing of some backbone sealing ring lip inner ring, so just can overcome inner ring wrinkling, but result also in the skew of sealing surface, thus cause sealing to decline.
Summary of the invention
The present invention is in order to overcome in swivel joint of the prior art poor sealing performance between hollow rotating shaft and axle sleeve, easily cause the deficiency of oil liquid leakage, provide good seal performance between a kind of hollow rotating shaft and axle sleeve, the high leak tightness swivel joint of energy automatic compensation sealing during ring wear.
To achieve these goals, the present invention adopts following technological scheme:
A kind of high leak tightness swivel joint, comprise hollow rotating shaft, axle sleeve, one end of axle sleeve is provided with end cap, the other end of axle sleeve is provided with connecting head, bearing is provided with between described hollow rotating shaft and axle sleeve, also backbone sealing ring is provided with between described hollow rotating shaft and axle sleeve, described backbone sealing ring comprises skeleton, seal ring body, the inner ring of described seal ring body extends to form the parallel seal lip of twice, the outer side surface inner ring of two seals lip is provided with sealing cone, the outer wall of described hollow rotating shaft is provided with circular groove, two sides of described circular groove are the conical surface of fitting with sealing cone, gap is formed between the inner ring of seal lip and the bottom land of circular groove, the outer ring sleeve of seal lip is provided with spring pressure ring, some elastic supporting member for supporting optical member are evenly provided with between two seals lip inner side surface.
The bi-side gluing, sealing of seal lip and hollow rotating shaft circular groove, pass through spring pressure ring, elastic supporting member for supporting optical member to radial direction, the axial compression of sealing cone simultaneously, along with use, sealing cone constantly weares and teares, sealing cone still can keep and circular groove sidewall gluing, sealing, and sealing contact surface also increases along with wearing and tearing, sealing effect is better; Owing to passing through conical surface seal, even if when therefore wear extent is larger, seal lip also can not be wrinkling, even if hollow rotating shaft rotational vibrations, axial runout, seal lip can produce adaptive deformation fine setting according to the axial runout of rotating shaft under spring pressure ring, elastic supporting member for supporting optical member effect, and remain sealing, therefore this kind of swivel joint overall sealing performance is good, energy automatic compensation sealing during seal lip wearing and tearing, long service life.
As preferably, two side roof parts of described circular groove extend to form and form sealing bulge loop.Time backbone sealing ring just loads, the sealing cone in seal lip only with circular groove contacts side surfaces, along with the wearing and tearing of seal lip, sealing cone can increase, now the last branch of sealing cone with seal bulge loop and contact, further enhanced leaktightness.
As preferably, described elastic supporting member for supporting optical member is stage clip or reed.
As preferably, described elastic supporting member for supporting optical member is reed, and two seals lip inner side surface is respectively equipped with support ring, and described reed is V-shaped, and the opening end of reed extends to form junction surface, and described junction surface is connected with bolt between support ring.Support ring can prevent seal lip local compression to be out of shape.
As preferably, the bottom of described reed is provided with pull bar, the outer end of described pull bar is stretched out outside axle sleeve through backbone sealing ring, the outside of described axle sleeve is provided with beacon, the outer end of described pull bar is connected with beacon, when pull bar moves a certain distance to the axle center of axle sleeve, pull bar trigger alert lamp is opened.Along with the wearing and tearing of sealing cone, the opening of reed increases, axially produce displacement towards axle sleeve bottom reed, when displacement reaches a certain amount of time, now think that seal lip has reached inefficacy edge (namely further wearing and tearing can cause seal failure), pull bar synchronously can produce a displacement identical with reed, thus the switch in trigger alert lamp, beacon is opened, thus reminds maintenance man, backbone sealing ring will lose efficacy, and need to change immediately; And common swivel joint only has when occurring just can change or often change at regular intervals when leaking, leakage is changed and is easily caused the accident, and because installation environment is different, wearing-in period is also different, and periodic replacement easily causes waste.
As preferably, described axle sleeve outer side wall is provided with groove, and beacon is arranged in groove by fitting seat, is also provided with lever in fitting seat, and the outer end, long limit of lever is connected with beacon switch, and minor face and the pull bar of lever are hinged.Pull bar be displaced through lever amplification, lever the other end pressure beacon switch.
As preferably, the minor face of described lever is arranged with telescopic cover, and outer end and the pull bar of described telescopic cover are hinged, and the outside of described pull bar is arranged with guide sleeve.Guide sleeve ensures that pull bar pulls resistance little, and telescopic cover prevents lever rotation from causing pull bar and surrounding to be interfered.
Therefore, the present invention has following beneficial effect: (1) seal lip can compensate sealing, long service life automatically along with wearing and tearing; (2) along with wearing and tearing, sealing surface increases gradually, further enhanced leaktightness; (3) when the wear extent of seal lip reaches inefficacy edge, warning is sent by beacon, prompting changing.
Accompanying drawing explanation
Fig. 1 is a kind of structural representation of the present invention.
Fig. 2 is A place partial enlargement structural representation in Fig. 1.
In figure: hollow rotating shaft 1 axle sleeve 2 end cap 3 connecting head 4 bearing 5 backbone sealing ring 6 circular groove 7 seals bulge loop 8 reed 9 pull bar 10 beacon 11 fitting seat 12 lever 13 telescopic cover 14 guide sleeve 15 skeleton 60 seal ring body 61 seal lip 610 sealing cone 611 spring pressure ring 612 support ring 613 junction surface 90.
Embodiment
Below in conjunction with the drawings and specific embodiments, the invention will be further described:
A kind of high leak tightness swivel joint as shown in Figure 1, comprise hollow rotating shaft 1, axle sleeve 2, one end of axle sleeve is provided with end cap 3, the other end of axle sleeve is provided with connecting head 4, connecting head is connected with axle sleeve bolt, the junction surface of connecting head and axle sleeve is provided with seal washer, bearing 5 is provided with between hollow rotating shaft and axle sleeve, backbone sealing ring 6 is also provided with between hollow rotating shaft 1 and axle sleeve 2, backbone sealing ring comprises skeleton 60, seal ring body 61, the inner ring of seal ring body 61 extends to form the parallel seal lip of twice 610, the outer side surface inner ring of two seals lip is provided with sealing cone 611, the outer wall of hollow rotating shaft 1 is provided with circular groove 7, two sides of circular groove are the conical surface of fitting with sealing cone, two side roof parts of circular groove 7 extend to form and form sealing bulge loop 8, gap is formed between the inner ring of seal lip 610 and the bottom land of circular groove, the outer ring sleeve of seal lip 610 is provided with spring pressure ring 612, some elastic supporting member for supporting optical member are evenly provided with between two seals lip inner side surface, elastic supporting member for supporting optical member can be stage clip or reed, in the present embodiment, elastic supporting member for supporting optical member is reed 9.
As shown in Figure 2, two seals lip inner side surface is respectively equipped with support ring 613, reed is V-shaped, the opening end of reed extends to form junction surface 90, between junction surface with support ring, bolt is connected, the bottom of reed 9 is provided with pull bar 10, the outer end of pull bar is stretched out outside axle sleeve through backbone sealing ring, axle sleeve 2 outer side wall is provided with groove, beacon 11 is arranged in groove by fitting seat 12, lever 13 is also provided with in fitting seat, the outer end, long limit of lever is connected with beacon switch, the minor face of lever 13 is arranged with telescopic cover 14, outer end and the pull bar of telescopic cover are hinged, the outside of pull bar is arranged with guide sleeve 15.
The bi-side gluing, sealing of seal lip 610 and circular groove on hollow rotating shaft 1, simultaneously by spring pressure ring, elastic supporting member for supporting optical member is to the radial direction of sealing cone, axial compression, along with use, sealing cone constantly weares and teares, sealing cone still can keep and circular groove sidewall gluing, sealing, and sealing contact surface also increases along with wearing and tearing, sealing effect is better, owing to passing through conical surface seal, even if when therefore wear extent is larger, seal lip also can not be wrinkling, when hollow rotating shaft rotational vibrations, during axial runout, seal lip can at spring pressure ring, adaptive deformation fine setting is produced according to the axial runout of rotating shaft under elastic supporting member for supporting optical member effect, remain sealing, therefore this kind of swivel joint overall sealing performance is good, energy automatic compensation sealing during seal lip wearing and tearing, long service life, along with the wearing and tearing of sealing cone, the opening of reed increases, axially displacement is produced towards axle sleeve bottom reed, when displacement reaches a certain amount of time, now think that seal lip has reached inefficacy edge (namely further wearing and tearing can cause seal failure), pull bar synchronously can produce a displacement identical with reed, the displacement of pull bar is after the amplification of lever, switch under the side pressure of lever long limit in beacon, beacon is opened, thus remind maintenance man, backbone sealing ring will lose efficacy, and need to change immediately, and common swivel joint only has when occurring just can change or often change at regular intervals when leaking, leakage is changed and is easily caused the accident, and because installation environment is different, wearing-in period is also different, and periodic replacement easily causes waste.Therefore, the present invention has following beneficial effect: (1) seal lip can compensate sealing, long service life automatically along with wearing and tearing; (2) along with wearing and tearing, sealing surface increases gradually, further enhanced leaktightness; (3) when the wear extent of seal lip reaches inefficacy edge, warning is sent by beacon, prompting changing.
Claims (7)
1. a high leak tightness swivel joint, comprise hollow rotating shaft (1), axle sleeve (2), one end of axle sleeve is provided with end cap (3), the other end of axle sleeve is provided with connecting head (4), bearing (5) is provided with between described hollow rotating shaft and axle sleeve, it is characterized in that, backbone sealing ring (6) is also provided with between described hollow rotating shaft (1) and axle sleeve (2), described backbone sealing ring comprises skeleton (60), seal ring body (61), the inner ring of described seal ring body (61) extends to form the parallel seal lip of twice (610), the outer side surface inner ring of two seals lip is provided with sealing cone (611), the outer wall of described hollow rotating shaft (1) is provided with circular groove (7), two sides of described circular groove are the conical surface of fitting with sealing cone, gap is formed between the inner ring of seal lip (610) and the bottom land of circular groove, the outer ring sleeve of seal lip (610) is provided with spring pressure ring (612), some elastic supporting member for supporting optical member are evenly provided with between two seals lip inner side surface.
2. a kind of high leak tightness swivel joint according to claim 1, is characterized in that, two side roof parts of described circular groove (7) extend to form and form sealing bulge loop (8).
3. a kind of high leak tightness swivel joint according to claim 1, is characterized in that, described elastic supporting member for supporting optical member is stage clip or reed.
4. a kind of high leak tightness swivel joint according to claim 1 and 2, it is characterized in that, described elastic supporting member for supporting optical member is reed (9), two seals lip inner side surface is respectively equipped with support ring (613), described reed is V-shaped, the opening end of reed extends to form junction surface (90), and described junction surface is connected with bolt between support ring.
5. a kind of high leak tightness swivel joint according to claim 4, it is characterized in that, the bottom of described reed (9) is provided with pull bar (10), the outer end of described pull bar is stretched out outside axle sleeve through backbone sealing ring, the outside of described axle sleeve (2) is provided with beacon (11), the outer end of described pull bar is connected with beacon, and when pull bar moves a certain distance to the axle center of axle sleeve, pull bar trigger alert lamp is opened.
6. a kind of high leak tightness swivel joint according to claim 5, it is characterized in that, described axle sleeve (2) outer side wall is provided with groove, beacon is arranged in groove by fitting seat (12), lever (13) is also provided with in fitting seat, the outer end, long limit of lever is connected with beacon switch, and minor face and the pull bar of lever are hinged.
7. a kind of high leak tightness swivel joint according to claim 6, is characterized in that, the minor face of described lever (13) is arranged with telescopic cover (14), and outer end and the pull bar of described telescopic cover are hinged, and the outside of described pull bar is arranged with guide sleeve (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410395636.0A CN104279385B (en) | 2014-08-13 | 2014-08-13 | A kind of high leakproofness swivel joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410395636.0A CN104279385B (en) | 2014-08-13 | 2014-08-13 | A kind of high leakproofness swivel joint |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104279385A true CN104279385A (en) | 2015-01-14 |
| CN104279385B CN104279385B (en) | 2016-05-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410395636.0A Active CN104279385B (en) | 2014-08-13 | 2014-08-13 | A kind of high leakproofness swivel joint |
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| CN (1) | CN104279385B (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105909897A (en) * | 2016-06-30 | 2016-08-31 | 刘延俊 | Automatic compensation type high-pressure rotating joint |
| CN106015564A (en) * | 2016-07-25 | 2016-10-12 | 湖州电动滚筒有限公司 | Novel oil leakage prevention and assembling-and-disassembling-prone electric rotary drum |
| CN108869554A (en) * | 2018-08-31 | 2018-11-23 | 无锡三立轴承股份有限公司 | Bearing seal |
| RU2706498C1 (en) * | 2016-08-24 | 2019-11-19 | Чжунвей (Шанхай) Энерджи Текнолоджи Ко. Лтд | Equipment for oxidizer injection during underground gasification of coal and its use |
| CN111779904A (en) * | 2020-06-04 | 2020-10-16 | 付贤安 | Hydraulic rotary joint for rotation of excavator |
| CN112879420A (en) * | 2021-01-14 | 2021-06-01 | 沈睿 | Ceramic bearing |
| CN113007352A (en) * | 2021-03-15 | 2021-06-22 | 沈阳大学 | X-shaped double-elastic pressing rotary sealing ring |
| CN113007350A (en) * | 2021-01-29 | 2021-06-22 | 东风柳州汽车有限公司 | Sealing element, waterway connecting mechanism and combination method thereof |
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| DE2012240A1 (en) * | 1970-03-14 | 1971-10-07 | Jahndorf H | Lip seal for swivel joints |
| US5653476A (en) * | 1995-09-18 | 1997-08-05 | National Science Council Of Republic Of China | Leakproof rotary joint |
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| CN103609248A (en) * | 2013-12-06 | 2014-03-05 | 浙江亿森机械有限公司 | Gear train sealing structure of harvester |
| CN203560440U (en) * | 2013-11-29 | 2014-04-23 | 西安航空发动机集团机电石化设备有限公司 | Sealing device applied to rolling mill |
| CN204153366U (en) * | 2014-08-13 | 2015-02-11 | 杭州优能特旋转接头制造厂 | A kind of rotary joint structure |
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| US2330197A (en) * | 1939-08-31 | 1943-09-28 | All Flex Corp | Flexible pipe joint |
| US2382375A (en) * | 1942-01-09 | 1945-08-14 | All Flex Corp | Flexible pipe coupling |
| DE2012240A1 (en) * | 1970-03-14 | 1971-10-07 | Jahndorf H | Lip seal for swivel joints |
| US5653476A (en) * | 1995-09-18 | 1997-08-05 | National Science Council Of Republic Of China | Leakproof rotary joint |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105909897A (en) * | 2016-06-30 | 2016-08-31 | 刘延俊 | Automatic compensation type high-pressure rotating joint |
| CN105909897B (en) * | 2016-06-30 | 2017-11-21 | 刘延俊 | A kind of automatic compensation type high-pressure rotary joint |
| CN106015564A (en) * | 2016-07-25 | 2016-10-12 | 湖州电动滚筒有限公司 | Novel oil leakage prevention and assembling-and-disassembling-prone electric rotary drum |
| CN106015564B (en) * | 2016-07-25 | 2018-01-26 | 湖州电动滚筒有限公司 | A kind of novel anti-leakage is oily, motorized pulleys easy to assemble |
| RU2706498C1 (en) * | 2016-08-24 | 2019-11-19 | Чжунвей (Шанхай) Энерджи Текнолоджи Ко. Лтд | Equipment for oxidizer injection during underground gasification of coal and its use |
| CN108869554A (en) * | 2018-08-31 | 2018-11-23 | 无锡三立轴承股份有限公司 | Bearing seal |
| CN111779904A (en) * | 2020-06-04 | 2020-10-16 | 付贤安 | Hydraulic rotary joint for rotation of excavator |
| CN111779904B (en) * | 2020-06-04 | 2021-09-28 | 山东恒旺集团有限公司 | Hydraulic rotary joint for rotation of excavator |
| CN112879420A (en) * | 2021-01-14 | 2021-06-01 | 沈睿 | Ceramic bearing |
| CN113007350A (en) * | 2021-01-29 | 2021-06-22 | 东风柳州汽车有限公司 | Sealing element, waterway connecting mechanism and combination method thereof |
| CN113007350B (en) * | 2021-01-29 | 2022-10-04 | 东风柳州汽车有限公司 | Sealing element, waterway connecting mechanism and combination method thereof |
| CN113007352A (en) * | 2021-03-15 | 2021-06-22 | 沈阳大学 | X-shaped double-elastic pressing rotary sealing ring |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104279385B (en) | 2016-05-18 |
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Address after: 311200 No. 120, zengjiaqiao community, Xintang street, Xiaoshan District, Hangzhou City, Zhejiang Province Patentee after: Hangzhou younengte rotary adapter Precision Manufacturing Co.,Ltd. Address before: 311200 No. 120, zengjiaqiao community, Xintang street, Xiaoshan District, Hangzhou City, Zhejiang Province Patentee before: HANGZHOU YOUNENGTE ROTATION CONNECTOR MANUFACTURING FACTORY |
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