CN102588706A - Flexible extension joint - Google Patents
Flexible extension joint Download PDFInfo
- Publication number
- CN102588706A CN102588706A CN2012100491593A CN201210049159A CN102588706A CN 102588706 A CN102588706 A CN 102588706A CN 2012100491593 A CN2012100491593 A CN 2012100491593A CN 201210049159 A CN201210049159 A CN 201210049159A CN 102588706 A CN102588706 A CN 102588706A
- Authority
- CN
- China
- Prior art keywords
- plate
- ring flat
- circular ring
- flexible bellows
- balance
- 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.)
- Pending
Links
Images
Landscapes
- Diaphragms And Bellows (AREA)
Abstract
A flexible extension joint is formed by coaxially welding a first working flexible bellows, a balancing flexible bellows with a large area and a second working flexible bellows between two flanges. The working flexible bellows and the balancing flexible bellows are welding type piece-shaped bellows formed by a plurality of S-shaped wavy stainless steel ring pieces. The flexible extension joint is suitable for fluid conveying pipelines for gas, oil, water and the like, the requirements for axial displacement and horizontal displacement of the pipelines caused by expansion caused by heat and contraction caused by cold can be met, the flexible extension joint has the advantages of good extension and air tightness, high pressure resistance and long service life, and the effect of enabling absorption of pipe pressure thrust to be zero is achieved.
Description
Technical field
The present invention relates to the gas transmission pipeline, particularly a kind of flexibleness stretching joint that is used for rectilinear duct equipment.Flexibleness stretching joint of the present invention is applicable to feed channel, oil-piping and waterpipe; Can not only satisfy the axial displacement that pipeline causes because of expanding with heat and contract with cold and the requirement of lateral displacement; Have the characteristics of good stretchability, tightness, high pressure resistant and long service life, can pipeline pressure thrust be absorbed and reach zero effect.
Background technique
In the high pressure pipe line of metallurgy, chemical system, in order to compensate the displacement that pipeline causes because of expanding with heat and contract with cold,, avoid pipeline to be subjected to displacement the destruction that causes because of expanding with heat and contract with cold with the protection pipeline, often to use flexible coupling.Existing flexible coupling is by end plate, stay-bolt, nut, bellows, and parts such as guide shell, middle adapter, flange constitute, and most materials is a stainless steel, connects through welding and accomplishes.Flexible coupling is connected in the high pressure pipe line through flange; Media such as ducted high temperature, pressurized gas or water are through the flexible coupling inner chamber, and conveying circulation in pipeline, in course of conveying; Pipeline can receive hydraulic pressure or air pressure impact force and expanded by heating; And flexible coupling is converted into bit shift compensation (bellows in the flexible coupling is stretched) with pressure or expansive force, thereby ensures that pipeline can not break because of expansion, guarantees the normal conveying of pipe interior medium.But above-mentioned existing flexible coupling still has following deficiency: 1, the bellows of flexible coupling is main compensating element, and bellows is to adopt the seamless steel pipe shaped by fluid pressure; In forming process; Owing to the reason of material own, can produce wall thickness change and structure property variation at crest and trough position, enlarge the defective in original material; After the moulding; Possibly trickle crackle occur because of plastic deformation at bellows crest and trough place, therefore in use leak easily, flexible coupling was lost efficacy.
2, more than middle 100mm, bellows is behind shaped by fluid pressure usually for the bore of existing flexible coupling, and rigidity is bigger; Stretchability is relatively poor, and bearing capacity is also less, in actual use; Can only absorb axial displacement and a small amount of radial displacement; Higher for those pressure-bearings, radial displacement requires bigger pipe-line equipment, and existing flexible coupling just can not meet the demands.The inventor has applied for a utility model patent--flexible coupling, and the patent No. is ZL02216264.x, this flexible coupling; Comprise two end plates, bellows, guide shell, stay-bolt and nut; Be welded with bellows between this end plate, in this bellows, be provided with guide shell, one of an end of this guide shell and two end plates form a fixed connection; The other end becomes free state; On the two end plates in the bellows outside, be provided with some corresponding screws said stay-bolt is passed each to screw and be screwed into nut, said bellows is to have the welding type bellows that the stainless steel ring plate of S shape wave constitutes by multi-disc, though the ripple number of its unit length improves more than 50 %.Adopt the welding type bellows, have the characteristic of durability, stretchability, tightness, high pressure-bearing preferably, but in real work, in the big pipeline of high pressure, displacement amount, use to also have deficiency, can not be satisfactory.
Summary of the invention
The objective of the invention is to overcome the deficiency of above-mentioned existing technology, a kind of flexibleness stretching joint that is used for rectilinear duct is provided, this flexibleness stretching joint can not only compensate pipeline axial and displacement radially, and to make the thrust that is formed pipeline by pipeline pressure be zero.
Technical solution of the present invention is following:
A kind of flexibleness stretching joint; Characteristics are that its formation is between two flanges, the flexible bellows of first work, flexible bellows of balance and the flexible bellows of second work that one group of area is bigger to be welded together composition coaxially, and flexible bellows of described work and the flexible bellows of balance all are to have the welding type sheet bellows that the stainless steel ring plate of S shape wave constitutes by multi-disc.
The concrete formation of described flexibleness stretching joint is; Between first flange and second flange, be work flexible bellows, the 4th circular ring flat-plate and second adapter of coaxial first adapter, the first circular ring flat-plate, the flexible bellows of first work, the first balance ring flat-plate, adapters of first larger caliber, the second circular ring flat-plate, the flexible bellows of balance, the 3rd circular ring flat-plate, adapters of second larger caliber, the second balance ring flat-plate, second successively along gas flow; The two ends outer wall of described first adapter welds with the inwall of described first flange and the inwall of the described first circular ring flat-plate respectively mutually; The two ends of the flexible bellows of described first work weld together with the described first circular ring flat-plate and the first balance ring flat-plate respectively through welding ring; The outward edge of the described first balance ring flat-plate welds with the end that described first larger caliber is taken over mutually; The other end outer wall that this first larger caliber is taken over and the inwall of the described second circular ring flat-plate be the company of weldering mutually; The flexible bellows of described balance welds with the described second circular ring flat-plate, the 3rd circular ring flat-plate respectively through the welding ring at two ends mutually; Welding is mutually taken over described second largest bore in the outer of the inwall of the 3rd circular ring flat-plate and the described second balance ring flat-plate; Be welded with the flexible bellows of second work between described second balance ring flat-plate and the described the 4th circular ring flat-plate, described second two ends taken over weld together with the inwall of the described the 4th circular ring flat-plate and described second flange respectively;
, described first adapter, the first circular ring flat-plate, the flexible bellows of first work, the first balance ring flat-plate, the adapter of first bore, the second circular ring flat-plate, the flexible bellows of balance, the 3rd circular ring flat-plate, the adapter of second largest bore, the second balance ring flat-plate, the flexible bellows of second work, the 4th circular ring flat-plate and second be provided with a guide shell in taking over the long chamber of the circle passage that constitutes; The inwall that one end of this guide shell and described first is taken over welds fixing mutually, and the other end of this guide shell freely extends to described second and takes over;
Between described first adapter and the first circular ring flat-plate, be provided with equally distributed polylith first gusset; Between described first larger caliber adapter and the second circular ring flat-plate, be provided with equally distributed polylith second gusset; Between the described the 3rd circular ring flat-plate and the adapter of second largest bore, be provided with equally distributed polylith the 3rd gusset, between described second adapter and the 4th circular ring flat-plate, be provided with equally distributed polylith the 4th gusset;
The periphery of the described first circular ring flat-plate and described the 4th circular ring flat-plate has an equally distributed N through hole; The periphery of the described second circular ring flat-plate and the 3rd circular ring flat-plate is provided with an equally distributed 2N through hole; After N root first pull bar passes the through hole of correspondence of the described first circular ring flat-plate, the second circular ring flat-plate and the 3rd circular ring flat-plate; The two ends thread section of N root first pull bar utilizes the nut and the described first circular ring flat-plate and the 3rd circular ring flat-plate to fix; N root second pull bar passes the through hole of the correspondence of the described second circular ring flat-plate, the 3rd circular ring flat-plate and the 4th circular ring flat-plate, and the two ends thread section of described N root second pull bar utilizes the nut and the described second circular ring flat-plate and the 4th circular ring flat-plate to fix.
Described flange is a hubbed flange.
The net sectional area of the flexible bellows of described balance is the twice of the flexible bellows net sectional area of work.
The flexible bellows of described second work is to be taken over to weld together coaxially through rigidity by the welding ring of the bellows more than to constitute.
The quantity of described first gusset, second gusset, the 3rd gusset and the 4th gusset is identical or different, described quantity >=3.
The quantity N of described N root first pull bar and N root second pull bar is the positive integer more than 3.
Technique effect of the present invention is following:
1, flexibleness stretching of the present invention saves it and can the pipeline thrust that pipeline pressure produced be limited in flexibleness stretching joint itself, and thrust is born by two groups of pull bars.
2, the net sectional area of the flexible bellows of described balance is the twice of the flexible bellows net sectional area of work; Because the flexible bellows of described work and the flexible bellows of balance all are to have the welding type sheet bellows that the stainless steel ring plate of S shape wave constitutes by multi-disc, thereby has the characteristic of the original durability preferably of welding type sheet bellows, stretchability, tightness, high pressure-bearing.
3, act on the flexible bellows of balance and pass through two groups of mutual interconnections of pull bar in the corresponding through hole of the described first circular ring flat-plate, the second circular ring flat-plate, the 3rd circular ring flat-plate and the 4th circular ring flat-plate with the pressure thrust that acts on flexibleness stretching joint two ends with the pressure thrust on the ring flat-plate of working between the flexible bellows; With the mutual balance of pressure thrust, thrust that can extraction duct is zero technique effect.
4, on probation showing; Flexibleness stretching joint of the present invention is applicable to feed channel, oil-piping and waterpipe; Can not only satisfy the axial displacement that pipeline causes because of expanding with heat and contract with cold and the requirement of lateral displacement; Have the characteristics of good stretchability, tightness, high pressure resistant and long service life, can pipeline pressure thrust be absorbed and reach zero effect.
Description of drawings
Fig. 1 be an embodiment of flexibleness stretching of the present invention joint partly cut open schematic representation
Embodiment
Below in conjunction with embodiment and accompanying drawing the present invention is described further, but should limit protection scope of the present invention with this.
See also Fig. 1; Fig. 1 be an embodiment of flexibleness stretching of the present invention joint partly cut open schematic representation; Visible by figure; The formation of flexibleness stretching joint of the present invention is; Between first flange 1 and second flange 21, taking over the flexible bellows of 2, the first circular ring flat-plate 4, first work 5, the first balance ring flat-plate 6, first larger caliber along first of gas flow coaxial welding successively takes over the circular ring flat-plate of the flexible bellows of 7, the second circular ring flat-plate 9, balance the 10, the 3rd 11, second larger caliber and takes over 13, the second balance ring flat-plate 14, the flexible bellows of second work, the 4th circular ring flat-plate 18 and second and take over 20; The flexible bellows of described in the present embodiment second work is to be welded coaxially through rigidity hard tube 16 by flexible bellows 15 of work and the flexible bellows 17 of work, and described flange is a hubbed flange;
The two ends outer wall of described first adapter 2 welds with the inwall of described first hubbed flange 1 and the inwall of the described first circular ring flat-plate 4 respectively mutually; The two ends of the flexible bellows 5 of described first work weld together with the described first circular ring flat-plate 4 and the first balance ring flat-plate 6 respectively through welding ring; The outward edge of the described first balance ring flat-plate 6 welds with an end of described first larger caliber adapter 7 mutually; The inwall that this first larger caliber is taken over 7 the other end outer wall and the described second circular ring flat-plate 9 is the company of weldering mutually; The flexible bellows 10 of described balance welds with described second circular ring flat-plate the 9, the 3rd circular ring flat-plate 11 respectively through the welding ring at two ends mutually; 13 welding are mutually taken over described second largest bore in the outer of the inwall of the 3rd circular ring flat-plate 11 and the described second balance ring flat-plate 14; Be welded with the flexible bellows of second work between described second balance ring flat-plate 14 and the described the 4th circular ring flat-plate 18, described second takes over 20 two ends welds together with the inwall of the described the 4th circular ring flat-plate 18 and described second hubbed flange 21 respectively;
Taking over the flexible bellows of 2, the first circular ring flat-plate 4, first work 5, the first balance ring flat-plate 6, first bore described first takes over the circular ring flat-plate of the flexible bellows of 7, the second circular ring flat-plate 9, balance the 10, the 3rd 11, second largest bore and takes over the flexible bellows of 13, the second balance ring flat-plate 14, work 15, rigidity hard tube 16, flexible bellows the 17, the 4th circular ring flat-plate 18 of work and second and take in the 20 long chamber of the circle passages that constitute and be provided with a guide shell 24; The inwall of one end of this guide shell 24 and described first adapter 2 welds fixing mutually, and the other end of this guide shell 24 freely extends to described second and takes over 20;
Between described first adapter, the 2 and first circular ring flat-plate 4, be provided with equally distributed polylith first gusset 3; Between described first larger caliber adapter, the 7 and second circular ring flat-plate 9, be provided with equally distributed polylith second gusset 8; Between the described the 3rd circular ring flat-plate 11 and second largest bore adapter 13, be provided with equally distributed polylith the 3rd gusset 12, take between the 20 and the 4th circular ring flat-plate 18 described second and be provided with equally distributed polylith the 4th gusset 19; Described in the present embodiment polylith is 6.
The periphery of the described first circular ring flat-plate 4 and the described the 4th circular ring flat-plate 18 has equally distributed 6 through holes; The periphery of the described second circular ring flat-plate 9 and the 3rd circular ring flat-plate 11 is provided with equally distributed 12 through holes; After 6 first pull bars 23 pass the through hole of correspondence of described first circular ring flat-plate 4, the second circular ring flat-plate 9 and the 3rd circular ring flat-plate 11; The two ends thread section of 6 first pull bars 23 utilizes the nut and the described first circular ring flat-plate 4 and the 3rd circular ring flat-plate 11 to fix; 6 second pull bars 22 pass the through hole of the correspondence of described second circular ring flat-plate the 9, the 3rd circular ring flat-plate 11 and the 4th circular ring flat-plate 18, and the two ends thread section of described 6 second pull bars 22 utilizes the nut and the described second circular ring flat-plate 9 and the 4th circular ring flat-plate 18 to fix.
The effective diameter of present embodiment is 30.2cm, and corresponding pipeline is the product by its useful area and ducted pressure by the thrust that pressure produces; The thrust of this pipeline is: F=P*A=30* (30.2) 2*3.14/4=21489kg; Calculate by this, the pressure thrust that acts on two end points of this pipeline is 22 tons more than, because flexibleness stretching of the present invention joint embodiment's use; Pipeline pressure thrust is reached for zero effect; Show that through practical probation flexibleness stretching of the present invention joint is applicable to feed channel, oil-piping and waterpipe, can not only satisfy the axial displacement that pipeline causes because of expanding with heat and contract with cold and the requirement of lateral displacement; Characteristics with good stretchability, tightness, high pressure resistant and long service life can absorb pipeline pressure thrust and be reached for zero effect.
Claims (7)
1. a flexibleness stretching saves; Be characterised in that its formation is between two flanges, the flexible bellows of first work, flexible bellows of balance and the flexible bellows of second work that one group of area is bigger to be welded coaxially, flexible bellows of described work and the flexible bellows of balance all are to have the welding type sheet bellows that the stainless steel ring plate of S shape wave constitutes by multi-disc.
2. flexibleness stretching joint according to claim 1; Be characterised in that its formation is; Between first flange (1) and second flange (21), be coaxial first to take over that (2), the first circular ring flat-plate (4), the first work flexible bellows (5), the first balance ring flat-plate (6), first larger caliber are taken over (7), the second circular ring flat-plate (9), the flexible bellows of balance (10), the 3rd circular ring flat-plate (11), second larger caliber is taken over (13), the second balance ring flat-plate (14), the flexible bellows of second work, the 4th circular ring flat-plate (18) and second adapter (20) successively along gas flow; The two ends outer wall of described first adapter (2) welds with the inwall of described first flange (1) and the inwall of the described first circular ring flat-plate (4) respectively mutually; The two ends of the described first flexible bellows of work (5) weld together with the described first circular ring flat-plate (4) and the first balance ring flat-plate (6) respectively through welding ring; The outward edge of the described first balance ring flat-plate (6) welds with the end that described first larger caliber is taken over (7) mutually; The other end outer wall that this first larger caliber is taken over (7) and the inwall of the described second circular ring flat-plate (9) be the company of weldering mutually; The flexible bellows of described balance (10) welds with the described second circular ring flat-plate (9), the 3rd circular ring flat-plate (11) respectively through the welding ring at two ends mutually; The outer of the inwall of the 3rd circular ring flat-plate (11) and the described second balance ring flat-plate (14) is taken over (13) with described second largest bore and is welded mutually; Be welded with the flexible bellows of second work between described second balance ring flat-plate (14) and the described the 4th circular ring flat-plate (18), described second take over (20) two ends weld together with the inwall of the described the 4th circular ring flat-plate (18) and described second flange (21) respectively;
In the circle length chamber passage that described first adapter (2), the first circular ring flat-plate (4), the first work flexible bellows (5), the first balance ring flat-plate (6), the adapter of first bore (7), the second circular ring flat-plate (9), the flexible bellows of balance (10), the 3rd circular ring flat-plate (11), the adapter of second largest bore (13), the second balance ring flat-plate (14), the second work flexible bellows (15), the 4th circular ring flat-plate (18) and second adapter (20) constitute, be provided with a guide shell (24); The inwall that one end of this guide shell (24) and described first is taken over (2) welds fixing mutually, and the other end of this guide shell (24) freely extends to described second and takes over (20);
Between described first adapter (2) and the first circular ring flat-plate (4), be provided with equally distributed polylith first gusset (3); Between described first larger caliber adapter (7) and the second circular ring flat-plate (9), be provided with equally distributed polylith second gusset (8); Between the described the 3rd circular ring flat-plate (11) and second largest bore adapter (13), be provided with equally distributed polylith the 3rd gusset (12), take between (20) and the 4th circular ring flat-plate (18) described second and be provided with equally distributed polylith the 4th gusset (19);
The periphery of the described first circular ring flat-plate (4) and the described the 4th circular ring flat-plate (18) has an equally distributed N through hole (25); The periphery of the described second circular ring flat-plate (9) and the 3rd circular ring flat-plate (11) is provided with an equally distributed 2N through hole (25); After N root first pull bar (23) passes the through hole (25) of correspondence of the described first circular ring flat-plate (4), the second circular ring flat-plate (9) and the 3rd circular ring flat-plate (11); The two ends thread section of N root first pull bar (23) utilizes the nut and the described first circular ring flat-plate (4) and the 3rd circular ring flat-plate (11) to fix; N root second pull bar (22) passes the through hole (25) of the correspondence of the described second circular ring flat-plate (9), the 3rd circular ring flat-plate (11) and the 4th circular ring flat-plate (18), and the two ends thread section of described N root second pull bar (22) utilizes the nut and the described second circular ring flat-plate (9) and the 4th circular ring flat-plate (18) to fix.
3. flexibleness stretching joint according to claim 2 is characterized in that described flange is a hubbed flange.
4. flexibleness stretching joint according to claim 2, the net sectional area that it is characterized in that the flexible bellows of described balance is the twice of the flexible bellows net sectional area of work.
5. flexibleness stretching joint according to claim 2 is characterized in that the flexible bellows of described second work is to be taken over through rigidity by the welding ring of the bellows more than to be welded coaxially.
6. flexibleness stretching joint according to claim 2 is characterized in that the quantity of described first gusset (3), second gusset (8), the 3rd gusset (12) and the 4th gusset (19) is identical or different, described quantity >=3.
7. according to each described flexibleness stretching joint of claim 2 to 6, it is characterized in that the quantity N of described N root first pull bar (23) and N root second pull bar (22) is the positive integer more than 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100491593A CN102588706A (en) | 2012-02-29 | 2012-02-29 | Flexible extension joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100491593A CN102588706A (en) | 2012-02-29 | 2012-02-29 | Flexible extension joint |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102588706A true CN102588706A (en) | 2012-07-18 |
Family
ID=46477761
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012100491593A Pending CN102588706A (en) | 2012-02-29 | 2012-02-29 | Flexible extension joint |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102588706A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111853409A (en) * | 2020-06-24 | 2020-10-30 | 洛阳双瑞特种装备有限公司 | Corrugated pipe with different deformation strengthening layers |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE589744C (en) * | 1930-11-07 | 1933-12-13 | Theodor Ullmann Dipl Ing | Expansion compensator |
| CN2610202Y (en) * | 2002-03-20 | 2004-04-07 | 上海永鑫气体弹簧有限公司 | Elastic joint |
| CN101184950A (en) * | 2005-05-27 | 2008-05-21 | 空中客车德国有限公司 | Articulate connection piece for tubes |
| CN201129590Y (en) * | 2007-12-21 | 2008-10-08 | 秦皇岛市泰德管业科技有限公司 | Special external pressure type straight pipe pressure equilibrium type corrugated pipe expansion node for coal gasification apparatus |
| CN201561233U (en) * | 2009-12-17 | 2010-08-25 | 南京晨光东螺波纹管有限公司 | Externally braced high-pressure anti-accumulation pressure balanced universal expansion joint |
| CN201723905U (en) * | 2010-07-21 | 2011-01-26 | 秦皇岛北方管业有限公司 | External compression-type compound expansion joint for coal gasification device |
| CN201944477U (en) * | 2010-12-27 | 2011-08-24 | 洛阳双瑞特种装备有限公司 | Straight pipe pressure-balancing type expansion joint for gasoline adsorption and desulfurization device |
| CN202532092U (en) * | 2012-02-29 | 2012-11-14 | 上海盛以德冶金装备科技有限公司 | Flexible telescopic joint |
-
2012
- 2012-02-29 CN CN2012100491593A patent/CN102588706A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE589744C (en) * | 1930-11-07 | 1933-12-13 | Theodor Ullmann Dipl Ing | Expansion compensator |
| CN2610202Y (en) * | 2002-03-20 | 2004-04-07 | 上海永鑫气体弹簧有限公司 | Elastic joint |
| CN101184950A (en) * | 2005-05-27 | 2008-05-21 | 空中客车德国有限公司 | Articulate connection piece for tubes |
| CN201129590Y (en) * | 2007-12-21 | 2008-10-08 | 秦皇岛市泰德管业科技有限公司 | Special external pressure type straight pipe pressure equilibrium type corrugated pipe expansion node for coal gasification apparatus |
| CN201561233U (en) * | 2009-12-17 | 2010-08-25 | 南京晨光东螺波纹管有限公司 | Externally braced high-pressure anti-accumulation pressure balanced universal expansion joint |
| CN201723905U (en) * | 2010-07-21 | 2011-01-26 | 秦皇岛北方管业有限公司 | External compression-type compound expansion joint for coal gasification device |
| CN201944477U (en) * | 2010-12-27 | 2011-08-24 | 洛阳双瑞特种装备有限公司 | Straight pipe pressure-balancing type expansion joint for gasoline adsorption and desulfurization device |
| CN202532092U (en) * | 2012-02-29 | 2012-11-14 | 上海盛以德冶金装备科技有限公司 | Flexible telescopic joint |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111853409A (en) * | 2020-06-24 | 2020-10-30 | 洛阳双瑞特种装备有限公司 | Corrugated pipe with different deformation strengthening layers |
| CN111853409B (en) * | 2020-06-24 | 2022-04-05 | 洛阳双瑞特种装备有限公司 | Corrugated pipe with different deformation strengthening layers |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103557514A (en) | Box type high-voltage heater | |
| CN202532092U (en) | Flexible telescopic joint | |
| CN102588706A (en) | Flexible extension joint | |
| CN202182285U (en) | Ultra-large diameter diversion pressure steel pipe expansion device of hydropower station | |
| CN210510575U (en) | Anti-adhesion high-temperature and high-pressure resistant sealant hose | |
| CN201925660U (en) | Pipeline expansion and retraction compensator | |
| CN2610202Y (en) | Elastic joint | |
| CN201997320U (en) | Loop reactor with displacement buffering function | |
| CN109405590B (en) | High-efficient heat exchanger of netted pipe layer of hexagon mesh screen | |
| CN203147143U (en) | Universal type corrugated pipe expansion joint with elastic connecting rod | |
| CN203571709U (en) | Header type high-pressure heater | |
| CN102109079A (en) | Pipeline expansion compensator | |
| CN103090151A (en) | Pressure balance type bellows expansion joint with outer pressure straight pipe | |
| CN206802606U (en) | A kind of double-deck alarm high-pressure draw bar type FlexbleJoint | |
| RU181266U1 (en) | HEAT EXCHANGER "PIPE IN PIPE" | |
| CN2624018Y (en) | Multifunctional resilient pipe joint | |
| CN2750277Y (en) | Heat exchanger with inhomogeneous heat exchange tubes | |
| CN102095324A (en) | Heat exchange equipment applying multi-layer heat exchange tubes | |
| CN212672603U (en) | Socket joint formula steel sleeve concrete pressure tube | |
| CN221075694U (en) | External pressure direct-buried heat insulation compensator unit connected by reducing pipe | |
| CN216694589U (en) | Floating tube-sheet heat exchanger with T-shaped ring sealing structure | |
| CN220851279U (en) | Insulating tube supporting ring that stability is good | |
| CN102147037A (en) | Novel composite-type compensator | |
| CN220669183U (en) | Steam conveying pipeline for garbage power generation | |
| CN208535425U (en) | A kind of reducing expansion bend |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20120718 |