CN103557388B - Crossover sub, mud tube assembly and double wheels trench cutter - Google Patents
Crossover sub, mud tube assembly and double wheels trench cutter Download PDFInfo
- Publication number
- CN103557388B CN103557388B CN201310520666.5A CN201310520666A CN103557388B CN 103557388 B CN103557388 B CN 103557388B CN 201310520666 A CN201310520666 A CN 201310520666A CN 103557388 B CN103557388 B CN 103557388B
- Authority
- CN
- China
- Prior art keywords
- tube
- crossover sub
- bearing
- flange
- connecting tube
- 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.)
- Active
Links
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
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Flanged Joints, Insulating Joints, And Other Joints (AREA)
- Joints Allowing Movement (AREA)
Abstract
The invention discloses a kind of crossover sub, mud tube assembly and double wheels trench cutter, this crossover sub comprises adaptor tube (10), bearing unit (20) and connecting pipe component (30), bearing (21) is set on adaptor tube, wherein, connecting pipe component comprises positioning ring (31), let out slurry circle (33) and connecting tube (32), bearing, positioning ring, let out slurry circle and connecting tube be set in successively on adaptor tube, positioning ring, connecting tube is fixedly installed relative to bearing support (22) with letting out to starch to enclose, the outer race section (32a) that connecting tube comprises the end being set in adaptor tube and the end-to-end joint part (32b) of docking with end, the end of connecting tube is provided with the first flange (32c), the end relative with the first flange of adaptor tube is provided with the second flange (13).Crossover sub can be connected by first flange at two ends and the second flange two bodys that needs rotate relatively respectively, and two bodys can be rotated relative to forward and reverse, by sheathed successively can dismounting easily.
Description
Technical field
The present invention relates to pipe fitting to connect, particularly, relate to a kind of crossover sub and comprise mud tube assembly and the double wheels trench cutter of this crossover sub.
Background technique
In double wheels trench cutter, because the mud tube being positioned at mud tube reel inside has relative rotary motion with the mud tube being positioned at mud tube reel outside, therefore these two sections of mud tubes need to be connected by crossover sub, to ensure that two sections of mud tubes can successfully relative movement.
In the rotating assembly of mud tube disclosed in CN201547434U (being equivalent to crossover sub), two ends, respectively by the two sections of mud tubes that are threaded, thus can only allow the unidirectional relative rotation of two sections of mud tubes, otherwise connection will be caused to loosen.In addition, in CN201547434U, during assembling, need in advance rotating seal be installed to hermetically sealed case and be assembled in water flowing rotating shaft together with rear pressing cover etc., be unfavorable for dismounting.In addition, in whole sealing system, seal point is more, and causing trouble point is more.
Therefore, there is complex structure in the crossover sub of prior art, inconvenience installs and be difficult to ensure the problem of sealing.
Summary of the invention
The object of this invention is to provide pipeline section that a kind of permission connects rotate relative to forward and reverse and be convenient to the crossover sub installed.
To achieve these goals, the invention provides a kind of crossover sub, this crossover sub comprises adaptor tube, bearing unit and connecting pipe component, described bearing unit comprises bearing and bearing support, described bearing housing is located on described adaptor tube, wherein, described connecting pipe component comprises positioning ring, let out slurry circle and connecting tube, described bearing, positioning ring, let out slurry circle and connecting tube be set on described adaptor tube successively, described positioning ring, connecting tube is fixedly installed relative to described bearing support with letting out to starch to enclose, the outer race section that described connecting tube comprises the end being set in described adaptor tube and the end-to-end joint part of docking with described end, the end of described connecting tube is provided with the first flange, the end relative with described first flange of described adaptor tube is provided with the second flange.
Preferably, described positioning ring, connecting tube and let out slurry circle connected as one by the first fastening piece, described bearing support, positioning ring, connecting tube and let out slurry circle connected as one by the second fastening piece.
Preferably, described first fastening piece and the second fastening piece are respectively multiple and are circumferentially crisscross arranged.
Preferably, the internal diameter of described end-to-end joint part is consistent with the internal diameter of described adaptor tube.
Preferably, the axial both sides of described bearing are respectively arranged with retainer and clamp, and described bearing support is fixedly connected with described retainer, and described adaptor tube is provided with for the convex shoulder of retainer described in backstop and the draw-in groove for installing described clamp.
Preferably, the inner ring of bearing described in described clamp backstop, described positioning ring has the protuberance of the outer ring for bearing described in backstop.
Preferably, described clamp comprises two semi-annular shape plates and spacing by the anti-knocking over be arranged on described adaptor tube.
Preferably, described positioning ring and described let out slurry circle between and described in let out slurry circle with described connecting tube between be provided with the first seal ring.
Preferably, the arranged outside of described adaptor tube has for sealing with described first seal ring the sleeve contacted, by the second seal ring sealing between described sleeve and described adaptor tube.
The present invention also provides a kind of mud tube assembly, and wherein, described mud tube assembly comprises the first pipeline section, the second pipeline section and crossover sub of the present invention, and described first pipeline section and described second pipeline section are connected to described second flange and described first flange.
The present invention also provides a kind of double wheels trench cutter, and wherein, described double wheels trench cutter comprises mud tube assembly of the present invention.
By technique scheme, crossover sub can be connected by first flange at two ends and the second flange two bodys that needs rotate relatively respectively, and two bodys can be rotated relative to forward and reverse, by sheathed successively can dismounting easily.
Other features and advantages of the present invention are described in detail in embodiment part subsequently.
Accompanying drawing explanation
Accompanying drawing is used to provide a further understanding of the present invention, and forms a part for specification, is used from explanation the present invention, but is not construed as limiting the invention with embodiment one below.In the accompanying drawings:
Fig. 1 is the axial sectional view of a kind of mode of execution that crossover sub of the present invention is described;
Fig. 2 is the view sub-anatomy of the connecting pipe component in Fig. 1;
Fig. 3 is the exploded perspective view of the structure that clamp is described.
Description of reference numerals
10 adaptor tube 11 sleeve 12 second seal ring 13 second flanges
14 convex shoulder 15 anti-knocking over 16 dust ring
20 bearing unit 21 bearing 22 bearing support 23 retainers
24 clamp 25 bolts
30 connecting pipe component 31 positioning rings
32 connecting tube 32a outer race section 32b end-to-end joint part 32c first flanges
33 let out slurry circle 34 first seal ring 35 first fastening piece 36 second fastening piece
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail.Should be understood that, embodiment described herein, only for instruction and explanation of the present invention, is not limited to the present invention.
In the present invention, when not doing contrary explanation, the noun of locality such as " upper and lower, left and right " of use typically refers to reference to upper and lower, left and right shown in the drawings; " inside and outside " refers to profile inside and outside relative to each parts itself.
According to an aspect of the present invention, a kind of crossover sub is provided, this crossover sub comprises adaptor tube 10, bearing unit 20 and connecting pipe component 30, described bearing unit 20 comprises bearing 21 and bearing support 22, described bearing 21 is set on described adaptor tube 10, wherein, described connecting pipe component 30 comprises positioning ring 31, let out slurry circle 33 and connecting tube 32, described bearing 21, positioning ring 31, let out slurry circle 33 and connecting tube 32 be set on described adaptor tube 10 successively, described positioning ring 31, connecting tube 32 and let out slurry circle 33 and be fixedly installed relative to described bearing support 22, the outer race section 32a that described connecting tube 32 comprises the end being set in described the adaptor tube 10 and end-to-end joint part 32b docked with described end, the end of described connecting tube 32 is provided with the first flange 32c, the end relative with described first flange 32c of described adaptor tube 10 is provided with the second flange 13.
Crossover sub can be connected relative two pipeline sections rotated of needs by the first flange 32c at two ends respectively with the second flange 13, thus can enable two pipeline sections connected by crossover sub of the present invention carry out relative clockwise and rotate counterclockwise, by sheathed successively can dismounting easily.Particularly, can from connecting tube 32 side successively running in bearings assembly 20, positioning ring 31, let out slurry circle 33 and connecting tube 32, and backward can dismantle each parts successively.
According to a further aspect in the invention, a kind of mud tube assembly is provided, wherein, described mud tube assembly comprises the first pipeline section, the second pipeline section and crossover sub of the present invention, and described first pipeline section and described second pipeline section are connected to described second flange 13 and described first flange 32c.
According to a further aspect in the invention, provide a kind of double wheels trench cutter, wherein, described double wheels trench cutter comprises mud tube assembly of the present invention.
In crossover sub of the present invention, described positioning ring 31 and described to let out between slurry circle 33 and described in let out between slurry circle 33 and described connecting tube 32 and be provided with the first seal ring 34, not only structure is simple, and can obtain reliable, good sealing.In addition, the first seal ring 34 is arranged on positioning ring 31, connecting tube 32 and lets out in slurry circle 33 between adjacent pairs, can let out slurry circle 33 and connecting tube 32 carrys out dismounting easily first seal ring 34 by dismounting successively.
In the present invention, end and the first flange 32c of described connecting tube 32 are welded to connect, and the welding edges relative with described first flange 32c of described adaptor tube 10 connects described second flange 13.
In the present invention, the first seal ring 34 and adaptor tube 10 are motive sealing.Preferably, the outside of described adaptor tube 10 can be fixedly installed for sealing with described first seal ring 34 sleeve 11 contacted, sealed by the second seal ring 12 between described sleeve 11 and described adaptor tube 10, described sleeve 11, second seal ring 12 and described adaptor tube 10 synchronous rotary.Thus, the first seal ring 34 seals in relative rotation with sleeve 11 all the time and contacts, and when sleeve 11 or the first seal ring 34 wear and tear, can only dismantle connecting pipe component 30 to change sleeve 11 or connecting pipe component 30, extend the working life of adaptor tube 10.
In a preferred embodiment of the invention, for the ease of dismantling and obtaining firm connection, as shown in Figure 1, described positioning ring 31, connecting tube 32 and let out slurry circle 33 can be connected as one by the first fastening piece 35 (such as screw), described bearing support 22, positioning ring 31, connecting tube 32 and let out slurry circle 33 can be connected as one by the second fastening piece 36.Thus, when such as needing replacing first seal ring 34 or sleeve 11, the nut being arranged in connecting tube 32 one end (Fig. 1 right-hand member) and first fastening piece 35 of the second fastening piece 36 can be dismantled, then can connecting pipe component 30 be dismantled (the mode of execution of Fig. 1 from adaptor tube 10 as a whole, can dismantle from adaptor tube 10 right-hand member), to change.After replacing completes, can connecting pipe component 30 be reinstalled on adaptor tube 10 as a whole, finally tighten the nut of the second fastening piece 36 and the first fastening piece 35 is installed.Understandably, when needs change positioning ring 31, let out slurry circle 33 and connecting tube 32 time, only need dismantle the parts needing to change successively.Such as, when slurry circle 33 is let out in needs replacing, the nut being positioned at connecting tube 32 one end and the first fastening piece 35 that only need dismantle the second fastening piece 36 are also dismantled connecting tube 32 subsequently and let out slurry circle 33.In other words, vertically the closer to the parts of connecting tube 32 side, during replacing, the associated components of required dismounting is fewer, also more can embody convenience of the present invention.
In addition, more preferably, described first fastening piece 35 and the second fastening piece 36 can be respectively multiple and circumferentially be crisscross arranged, to obtain circumferentially balanced, firm connection.
As mentioned above, present invention employs at least two the first seal rings 34 to implement mechanical seal, effectively ensure that sealing.Because the first seal ring 34 can wear and tear in long-time using process, check abrasion condition for convenience, preferably, described in let out on slurry circle 33 and can be provided with row's small opening for discharging leakage liquid.Be example in the illustrated embodiment, comprising two the first seal rings 34, during use, when the liquid in adaptor tube 10 enters the gap between adaptor tube 10 and connecting pipe component 30 from end-to-end joint part 32b, the sealing by least two the first seal rings 34 stopped.When first seal ring 34 on the right side in Fig. 1 and Fig. 2 weares and teares and causes leaking, liquid in above-mentioned gap will to be entered between two the first seal rings 34 and flowed out by the drain boles let out on slurry circle 33, thus operator can also change the first seal ring 34 worn and torn by Timeliness coverage, in order to avoid leakage situation worsens and finally causes connecting pipe component 30 to lose efficacy.
In addition, for avoiding plugging, preferably make the internal diameter of described end-to-end joint part 32b of the present invention consistent with the internal diameter of described adaptor tube 10.
In the present invention, bearing unit 20 can be installed by suitable mode, is located.Such as, in the embodiment of figure 1, the axial both sides of described bearing 21 are respectively arranged with the retainer 23 of locating the outer ring of bearing 21 and the clamp 24 of locating the inner ring of bearing 21, described adaptor tube 10 is provided with for the convex shoulder 14 of retainer described in backstop 23 and the draw-in groove for installing described clamp 24, and bearing support 22 can be connected with retainer 23 fixing (such as passing through screw).Thus, bearing 21 can pass through retainer 23 and clamp 24 axially locating.Wherein, between convex shoulder 14 and retainer 23, dust ring 16 can be set, to guarantee bearing unit 20 and outside dust sealing.
Wherein, retainer 23 can keep transfixion by various suitable mode, thus guarantees bearing support 22, positioning ring 31, connecting tube 32 and let out slurry circle 33 to keep fixing, and allows adaptor tube 10 to rotate.Such as, outside stopping device can be used to keep the transfixion of retainer 23.
In addition, as shown in Figure 1, the inner ring of bearing 21 described in described clamp 24 backstop, described positioning ring 31 can have the protuberance of the outer ring for bearing described in backstop 21.In other words, retainer 23, clamp 24 and positioning ring 31 coordinate the axially locating realizing bearing unit 20.
Preferably, as shown in Figure 3, described clamp 24 can comprise two semi-annular shape plates and spacing by the anti-knocking over 15 be arranged on described adaptor tube 10.Thus, the clamp 24 of non-standard component can be used, thus (axial tension of such as bearing needed for adaptor tube 10) thickness of clamp 24 can be designed as required, to meet the usage requirement of crossover sub.Wherein, anti-knocking over 15 can be arranged in the restraining groove on adaptor tube 10, and from the radial outside backstop clamp 24 of clamp 24.
Below for the mode of execution shown in Fig. 1, the installation of crossover sub of the present invention is described.Wherein, crossover sub of the present invention can carry out one-sided installation easily, and namely each parts are all in place from the right side Fig. 1.Before installation, first the end of described adaptor tube 10 and described second flange 13 are welded to connect, and the end of described connecting tube 32 and the first flange 32c are welded to connect, if first crossover sub assembling is welded corresponding site again, be not easy to the carrying out of welding procedure after assembling, and it is also inconvenient orthopedic easily to produce welding deformation, causes crossover sub not meet usage requirement, therefore, need first region of interest to be welded in place to assemble again.During assembling, first, by retainer 23 and dust ring 16 backstop in convex shoulder 14; Then bearing unit 20 is arranged on adaptor tube 10, and bearing support 22 is fixed on retainer 23, located by retainer 23; Clamp 24 and anti-knocking over 15 can be installed subsequently, thus substantially complete the location of bearing unit 20; Finally connecting pipe component 30 is installed.When connecting pipe component 30 is installed, first positioning ring 31 is installed, makes it against bearing 21, then install and let out slurry circle 33 and corresponding first seal ring 34, subsequently connecting tube 32 is installed, fix finally by the first fastening piece 35 and the second fastening piece 36.
During dismounting, be reversed above-mentioned steps.In addition, when replacing first seal ring 34 or sleeve 11, without the need to dismantling parts such as bearing unit 20 grade, only connecting pipe component 30 need be taken off and can change, convenient and swift.When needs change positioning ring 31, let out slurry circle 33 and connecting tube 32 time, only need dismantle the parts needing to change successively.
Below the preferred embodiment of the present invention is described in detail by reference to the accompanying drawings; but; the present invention is not limited to the detail in above-mentioned mode of execution; within the scope of technical conceive of the present invention; can carry out multiple simple variant to technological scheme of the present invention, these simple variant all belong to protection scope of the present invention.
It should be noted that in addition, each the concrete technical characteristics described in above-mentioned embodiment, in reconcilable situation, can be combined by any suitable mode.In order to avoid unnecessary repetition, the present invention illustrates no longer separately to various possible compound mode.
In addition, also can carry out combination in any between various different mode of execution of the present invention, as long as it is without prejudice to thought of the present invention, it should be considered as content disclosed in this invention equally.
Claims (11)
1. a crossover sub, this crossover sub comprises adaptor tube (10), bearing unit (20) and connecting pipe component (30), described bearing unit (20) comprises bearing (21) and bearing support (22), described bearing (21) is set on described adaptor tube (10), it is characterized in that, described connecting pipe component (30) comprises positioning ring (31), let out slurry circle (33) and connecting tube (32), described bearing (21), positioning ring (31), let out slurry circle (33) and connecting tube (32) be set on described adaptor tube (10) successively, described positioning ring (31), connecting tube (32) and let out slurry circle (33) be fixedly installed relative to described bearing support (22), the outer race section (32a) that described connecting tube (32) comprises the end being set in described adaptor tube (10) and the end-to-end joint part (32b) of docking with described end, the end of described connecting tube (32) is provided with the first flange (32c), the end relative with described first flange (32c) of described adaptor tube (10) is provided with the second flange (13).
2. crossover sub according to claim 1, it is characterized in that, described positioning ring (31), connecting tube (32) and let out slurry circle (33) connected as one by the first fastening piece (35), described bearing support (22), positioning ring (31), connecting tube (32) and let out slurry enclose (33) connected as one by the second fastening piece (36).
3. crossover sub according to claim 2, is characterized in that, described first fastening piece (35) and the second fastening piece (36) are respectively multiple and are circumferentially crisscross arranged.
4. crossover sub according to claim 1, is characterized in that, the internal diameter of described end-to-end joint part (32b) is consistent with the internal diameter of described adaptor tube (10).
5. according to the crossover sub in claim 1-4 described in any one, it is characterized in that, the axial both sides of described bearing (21) are respectively arranged with retainer (23) and clamp (24), described bearing support (22) is fixedly connected with described retainer (23), and described adaptor tube (10) is provided with for the convex shoulder (14) of retainer described in backstop (23) and the draw-in groove for installing described clamp (24).
6. crossover sub according to claim 5, it is characterized in that, the inner ring of bearing (21) described in described clamp (24) backstop, described positioning ring (31) has the protuberance of the outer ring for bearing described in backstop (21).
7. crossover sub according to claim 5, is characterized in that, described clamp (24) comprises two semi-annular shape plates and spacing by the anti-knocking over (15) be arranged on described adaptor tube (10).
8. crossover sub according to claim 1, it is characterized in that, described positioning ring (31) and described let out slurry circle (33) between and described in let out slurry circle (33) and described connecting tube (32) between be provided with the first seal ring (34).
9. crossover sub according to claim 8, it is characterized in that, the arranged outside of described adaptor tube (10) has for sealing with described first seal ring (34) sleeve (11) contacted, by the second seal ring (12) sealing between described sleeve (11) and described adaptor tube (10).
10. a mud tube assembly, it is characterized in that, described mud tube assembly comprises the first pipeline section, the second pipeline section and according to the crossover sub in claim 1-9 described in any one, and described first pipeline section and described second pipeline section are connected to described second flange (13) and described first flange (32a).
11. 1 kinds of double wheels trench cutter, is characterized in that, described double wheels trench cutter comprises mud tube assembly according to claim 10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310520666.5A CN103557388B (en) | 2013-10-29 | 2013-10-29 | Crossover sub, mud tube assembly and double wheels trench cutter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310520666.5A CN103557388B (en) | 2013-10-29 | 2013-10-29 | Crossover sub, mud tube assembly and double wheels trench cutter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103557388A CN103557388A (en) | 2014-02-05 |
| CN103557388B true CN103557388B (en) | 2015-09-30 |
Family
ID=50011708
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310520666.5A Active CN103557388B (en) | 2013-10-29 | 2013-10-29 | Crossover sub, mud tube assembly and double wheels trench cutter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103557388B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105673826B (en) * | 2016-03-17 | 2018-05-15 | 重庆望江工业有限公司 | A kind of wind turbine gearbox guides axle sealing structure |
| CN112833185B (en) * | 2021-02-05 | 2022-08-12 | 江苏徐工工程机械研究院有限公司 | Tensile revolving body |
| CN115637750A (en) * | 2022-10-17 | 2023-01-24 | 中铁工程机械研究设计院有限公司 | Rotary joint and double-wheel mill |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201547434U (en) * | 2009-11-19 | 2010-08-11 | 深圳市钻通工程机械股份有限公司 | Slurry swivel joint assembly |
| CN201897027U (en) * | 2010-07-16 | 2011-07-13 | 四川什邡东润制造有限公司 | Rotary joint |
| CN202972292U (en) * | 2012-11-18 | 2013-06-05 | 苏州蓝王机床工具科技有限公司 | Structure of rotary air inlet joint |
| CN203549196U (en) * | 2013-10-29 | 2014-04-16 | 上海中联重科桩工机械有限公司 | Adapter connector, slurry pipe assembly and double-wheel milling trenching machine |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6508492B2 (en) * | 2001-03-12 | 2003-01-21 | The United States Of America As Represented By The Secretary Of The Navy | Swiveling hose coupling |
-
2013
- 2013-10-29 CN CN201310520666.5A patent/CN103557388B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201547434U (en) * | 2009-11-19 | 2010-08-11 | 深圳市钻通工程机械股份有限公司 | Slurry swivel joint assembly |
| CN201897027U (en) * | 2010-07-16 | 2011-07-13 | 四川什邡东润制造有限公司 | Rotary joint |
| CN202972292U (en) * | 2012-11-18 | 2013-06-05 | 苏州蓝王机床工具科技有限公司 | Structure of rotary air inlet joint |
| CN203549196U (en) * | 2013-10-29 | 2014-04-16 | 上海中联重科桩工机械有限公司 | Adapter connector, slurry pipe assembly and double-wheel milling trenching machine |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103557388A (en) | 2014-02-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| RU2508492C1 (en) | Device and method for connection of two-jacket pipes (versions) | |
| RU2489635C1 (en) | Device for connection of double pipes with jacket | |
| CN103557388B (en) | Crossover sub, mud tube assembly and double wheels trench cutter | |
| US20160201806A1 (en) | Diaphragm air seal | |
| US10550827B2 (en) | Methods and devices for accessing a drive train of a wind turbine with elastic coupling, wind turbine and methods | |
| RU2016112949A (en) | ROTATING ASSEMBLY CONTAINING A TRANSMISSION GEAR AND OIL DISTRIBUTION SYSTEM | |
| CN203549196U (en) | Adapter connector, slurry pipe assembly and double-wheel milling trenching machine | |
| RU2332591C2 (en) | Centrifugal pump | |
| CN103363236A (en) | Pipe connector with compensator | |
| US20170370514A1 (en) | Flow-undisrupted process | |
| US20160108968A1 (en) | Stopper piece and bearing apparatus | |
| US9770981B2 (en) | System and method for unified torque transmission and rotary sealing | |
| KR20110086235A (en) | Apparatus for disassembling pipe coupling | |
| CN203453317U (en) | Sealable flexible connection mechanism | |
| ES2745293T3 (en) | Flange connection | |
| JP4808544B2 (en) | Telescopic flexible pipe joint | |
| US20190338875A1 (en) | Elbow-equipped expansion joint | |
| CN105864548A (en) | Pipeline compensator | |
| JP2013133857A (en) | Repairing extensible flexible joint | |
| US8523688B2 (en) | Hanger bearing coupling | |
| CN102352891B (en) | With the synchronous universal coupling in intermediate support formula three ball cage joints | |
| RU2488030C1 (en) | Pipeline hinged joint | |
| CN104295524A (en) | Drill pump with fixed position bushing | |
| JP5354282B2 (en) | Rotating machine temperature sensor laying structure | |
| JP6621280B2 (en) | How to install pipe fittings |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |