CN111975238A - Compensator ring pressure welding method - Google Patents
Compensator ring pressure welding method Download PDFInfo
- Publication number
- CN111975238A CN111975238A CN202010859060.4A CN202010859060A CN111975238A CN 111975238 A CN111975238 A CN 111975238A CN 202010859060 A CN202010859060 A CN 202010859060A CN 111975238 A CN111975238 A CN 111975238A
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- Prior art keywords
- ring
- pipe
- ring piece
- compensator
- welding method
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
- B23K31/02—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to soldering or welding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
- B23K31/02—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to soldering or welding
- B23K31/022—Making profiled bars with soldered or welded seams
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
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- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Arc Welding In General (AREA)
Abstract
A compensator ring pressure welding method comprises an outer sleeve, an inner guide pipe, an elastic extension pipe, a first ring piece and a second ring piece, wherein the first ring piece, one end of the elastic extension pipe and the outer sleeve form a three-layer structure, the second ring piece, the other end of the elastic extension pipe and the inner guide pipe form a three-layer structure, the three-layer structure is firstly pressed and pressed by a plurality of rings to form a plurality of pressing ring lines distributed along the axial direction, the first ring piece comprises a first side close to the main body of the elastic extension pipe, the second ring piece comprises a second side close to the main body of the elastic extension pipe, the pressing ring lines are arranged far away from the first side and the second side, and then welding is carried out at the pressing ring lines. The three-layer structure is adopted for firstly pressing and then welding, so that the problem that welding between the thin wall and the thick pipe of the metal corrugated pipe is easy to weld through is solved, and the unfavorable phenomenon that welding burning loss is caused by the fact that seams exist due to different ellipticity of the multi-layer structure at the welding position in the direct welding process is solved.
Description
Technical Field
The invention relates to the technical field of gas pipelines, in particular to a compensator ring pressure welding method.
Background
In order to prevent the pipeline from deforming or breaking due to thermal elongation caused by temperature change or temperature stress, a compensator is often arranged on the pipeline for compensating the thermal elongation of the pipeline so as to reduce the stress of the pipeline wall. Most of the existing compensators have the defects of small compensation amount and short service life. Based on this, CN210319013U discloses a gas pipeline compensator, which comprises an outer sleeve, an inner conduit and an elastic telescopic tube, wherein the effect of compensating the amount of expansion with heat and contraction with cold is achieved by the cooperation of three tubes, one end of the elastic telescopic tube is welded at the tube end of the outer sleeve, the other end is welded on the tube wall of the inner conduit, and the elastic telescopic tube is a metal corrugated tube.
The elastic telescopic pipe is generally made of metal corrugated pipe, and the thin wall of the metal corrugated pipe is arranged, so that the pipe walls of the inner pipe and the outer sleeve are thickened, and the metal corrugated pipe, the inner pipe and the outer sleeve are welded together under the adverse conditions of welding penetration and burning loss. Moreover, the cost price of the metal corrugated pipe is far higher than that of a common straight pipe such as an inner conduit, so that the metal corrugated pipe is directly discarded due to burning loss, and the manufacturing cost is increased.
Disclosure of Invention
The invention aims to provide a compensator ring pressure welding method, which adopts a three-layer structure for firstly pressing and then welding, solves the problem that welding between a thin wall and a thick pipe of a metal corrugated pipe is easy to weld through, and solves the unfavorable phenomenon of welding burning loss caused by the existence of gaps due to different ovalities of a multilayer structure at a welding position in direct welding.
The embodiment of the invention is realized by the following technical scheme:
a compensator ring pressure welding method comprises an outer sleeve, an inner pipe and an elastic telescopic pipe, wherein one end of the inner pipe extends into the outer sleeve, the outer sleeve is sleeved at one end of the inner pipe, the inner pipe is connected with the outer sleeve in a sliding fit mode through the elastic telescopic pipe, the elastic telescopic pipe is sleeved at the other end of the inner pipe, two ends of the elastic telescopic pipe are fixedly connected with the outer sleeve and the inner pipe respectively, a first ring piece and a second ring piece are further arranged, the first ring piece, one end of the elastic telescopic pipe and the outer sleeve form a three-layer structure, the second ring piece, the other end of the elastic telescopic pipe and the inner pipe form a three-layer structure, the three-layer structure forms a plurality of pressing ring lines distributed along the axial direction through a plurality of ring pressure pressing, the first ring piece comprises a first side close to the main body of the elastic telescopic pipe, the second ring piece comprises a second side close, And arranging the second side, and then welding at the stitching loop line.
Furthermore, the first ring piece comprises a third side far away from the main body of the elastic telescopic pipe, the second ring piece comprises a fourth side far away from the main body of the elastic telescopic pipe, the third side and the fourth side are respectively pressed circularly to form a pressing ring line, and welding is carried out at the pressing ring line.
Further, the elastic bellows comprises a metal bellows.
Further, first ring piece all is equipped with arc portion in first side department, second ring piece in second side department, and metal corrugated pipe is including the ripple section that is located main part department, and the wave trough arcwall face of arc portion and ripple section closely is pressed close to and is met.
Further, the first ring piece and the second ring piece are made of metal materials.
Furthermore, the compensator both ends are connected with the gas pipe through the clamp.
Furthermore, the telescopic pipe is further provided with a protective sleeve, the protective sleeve is wrapped around the elastic telescopic pipe, one end of the protective sleeve is fixedly connected with the inner catheter, and the other end of the protective sleeve is arranged at an interval relative to the outer sleeve.
Further, the protective sleeve is made of stainless steel material or plastic material.
The technical scheme of the embodiment of the invention at least has the following advantages and beneficial effects: the first ring piece and the second ring piece are correspondingly added at the positions where the two ends of the elastic extension tube are respectively connected with the inner guide tube and the outer sleeve, three-layer structures are formed, the radius of each layer in the three-layer structures is different, the welding is carried out at the ring line pressing part after the ring pressing is carried out, the gap in the multi-layer structures is removed, and the unfavorable phenomenon of welding burning loss caused by the gap due to the fact that the ovality of the multi-layer structures at the welding part is different when the welding is carried out directly is solved; and through the mode of additionally arranging the first ring piece and the second ring piece, the elastic extension tube is prevented from being directly subjected to fusion welding, and the problem that welding between the thin wall and the thick tube of the metal corrugated tube is easy to weld through is solved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is a schematic diagram of a first structure of a compensator according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a second structure of the compensator according to the embodiment of the present invention;
FIG. 3 is a schematic diagram of a third structure of the compensator according to the embodiment of the present invention;
fig. 4 is a schematic diagram of a fourth structure of the compensator according to the embodiment of the invention.
Icon: 100-outer sleeve, 200-inner tube, 300-elastic telescopic tube, 310-corrugated section, 400-first ring sheet, 410-first side, 420-third side, 430-arc part, 500-second ring sheet, 510-second side, 520-fourth side, 600-pressing ring line, 700-protective sleeve.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. indicate an orientation or a positional relationship based on that shown in the drawings or that the product of the present invention is used as it is, this is only for convenience of description and simplification of the description, and it does not indicate or imply that the device or the element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be further noted that unless otherwise explicitly stated or limited, the terms "disposed," "mounted," "connected," and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Referring to fig. 1 and 2, a method for welding a compensator by ring pressure includes an outer sleeve 100, an inner conduit 200, and an elastic extension tube 300, wherein one end of the inner conduit 200 extends into the outer sleeve 100, the outer sleeve 100 is sleeved on one end of the inner conduit 200, the inner conduit 200 is connected with the outer sleeve 100 through the elastic extension tube 300 in a sliding fit manner, the elastic extension tube 300 is sleeved on the other end of the inner conduit 200, and two ends of the elastic extension tube 300 are respectively fixedly connected with the outer sleeve 100 and the inner conduit 200. A protective sleeve 700 is further provided, the protective sleeve 700 is disposed around the elastic extension tube 300, one end of the protective sleeve 700 is fixedly connected to the inner catheter 200, and the other end is disposed opposite to the outer catheter 100 at an interval. Protective sheath 700 can adopt stainless steel material, plastic materials etc. to make, guarantees the operational environment of metal bellows through protective sheath 700600, guarantees the life of bellows.
Referring to fig. 2, 3 and 4, the compensator further includes a first ring 400 and a second ring 500, and the first ring 400 and the second ring 500 may be made of a metal material. The first ring piece 400, one end of the elastic extension tube 300 and the outer sleeve 100 form a three-layer structure, the second ring piece 500, the other end of the elastic extension tube 300 and the inner guide tube 200 form a three-layer structure, the three-layer structure is firstly formed into a plurality of pressing ring lines 600 distributed along the axial direction through a plurality of ring pressing, the first ring piece 400 comprises a first side 410 close to the main body of the elastic extension tube 300, the second ring piece 500 comprises a second side 510 close to the main body of the elastic extension tube 300, the pressing ring lines 600 are all arranged away from the first side 410 and the second side 510, and then welding is carried out at the pressing ring lines 600.
The first ring piece 400 and the second ring piece 500 are correspondingly added at the positions where the two ends of the elastic extension tube 300 are respectively connected with the inner catheter 200 and the outer sleeve 100 to form a three-layer structure, wherein the radius of each layer in the three-layer structure is different, and the seam in the multi-layer structure is removed by performing annular pressing and then performing welding at the pressing position, namely the pressing ring line 600, so that the adverse phenomenon of welding burning loss caused by the seam due to different ovalities of the multi-layer structure at the welding position during direct welding is solved; in addition, by additionally arranging the first ring piece 400 and the second ring piece 500, the elastic extension tube 300 is prevented from being directly subjected to fusion welding, and the problem that the welding between the thin wall and the thick tube of the metal corrugated tube is easy to weld through is solved.
Further, referring to fig. 3 and 4, the first ring 400 includes a third side 420 far away from the main body of the elastic extension tube 300, the second ring 500 includes a fourth side 520 far away from the main body of the elastic extension tube 300, and the third side 420 and the fourth side 520 are respectively pressed to form a pressing ring 600 and welded at the pressing ring 600. The third side 420 and the fourth side 520 are preferably ring-pressed and welded.
Further, referring to fig. 3 and 4, the elastic bellows 300 may be a metal bellows. The first ring piece 400 and the second ring piece 500 are both provided with an arc portion 430 at the first side 410 and the second side 510, the metal corrugated pipe includes a corrugated section 310 located at the main body, and the arc portion 430 is closely attached to the arc surface of the trough of the corrugated section 310.
When the arc portion 430 is not provided, when the metal corrugated pipe elastically deforms to compensate the expansion and contraction of the gas pipeline, the corrugated section 310 of the metal corrugated pipe deforms, and the deformation pressure is transmitted to one end of the corrugated pipe, specifically, the flat end is connected with the ring sleeve, the outer sleeve 100 or the inner conduit 200 at a position which is radially overlapped with each other, wherein the stress of the ring sleeve close to one end of the corrugated pipe is the maximum, and if the metal corrugated pipe fails, the metal corrugated pipe is often broken from the maximum stress position.
In the technical scheme of this embodiment, through addding arc portion 430, after compensator overall installation, the arcwall face of arc portion 430 and its ripple section 310 both sides trough in close contact with of corrugated metal pipe, the deformation action that combines the bellows, it moves and the unchangeable deformation action of straight portion through the kink to addding arc portion 430 is favorable to increasing the stress area of original atress maximum department, thereby reduce maximum pressure, the long-term compensating operation of protection bellows, improve corrugated metal pipe's life.
Furthermore, the compensator both ends are connected with the gas pipe through the clamp. Replace the flange joint mode commonly used in the current, make things convenient for the compensator and the gas pipe be connected and dismantle through the clamp, make things convenient for the change and the maintenance in later stage. Such as in the form of a clip of the segmented exhaust pipe interface connection disclosed in CN204457976U, and the like.
In addition, a plurality of pressing loop lines 600 are formed by adopting the three-layer structure in a pressing mode and then welding is carried out, so that the problem that the thin wall of the metal corrugated pipe is easy to weld through and burn is solved. Aiming at the annular welding seam at the pressed annular line 600 after welding, the annular coil is adopted for carrying out accurate heat treatment, and corresponding surface polishing and other processes are carried out aiming at surface oxidation caused by welding.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. A compensator ring pressure welding method comprises an outer sleeve, an inner pipe and an elastic telescopic pipe, wherein one end of the inner pipe extends into the outer sleeve, the outer sleeve is sleeved at one end of the inner pipe, the inner pipe is connected with the outer sleeve in a sliding fit mode through the elastic telescopic pipe, the elastic telescopic pipe is sleeved at the other end of the inner pipe, and two ends of the elastic telescopic pipe are fixedly connected with the outer sleeve and the inner pipe respectively, and the compensator ring pressure welding method is characterized in that:
the first ring piece, one end of the elastic extension tube and the outer sleeve form a three-layer structure, the second ring piece, the other end of the elastic extension tube and the inner guide tube form a three-layer structure, and the three-layer structure is pressed and pressed by a plurality of rings to form a plurality of pressing ring lines distributed along the axial direction;
the first ring piece comprises a first side close to the main body of the elastic extension tube, the second ring piece comprises a second side close to the main body of the elastic extension tube, and the pressing ring lines are arranged far away from the first side and the second side;
and then welding is carried out at the position of the pressing ring line.
2. The compensator ring pressure welding method according to claim 1, wherein: the first ring piece comprises a third side far away from the main body of the elastic telescopic pipe, the second ring piece comprises a fourth side far away from the main body of the elastic telescopic pipe, the third side and the fourth side are respectively pressed circularly to form a pressing ring line, and welding is carried out at the pressing ring line.
3. The compensator ring pressure welding method according to claim 1, wherein: the elastic telescopic pipe comprises a metal corrugated pipe.
4. The compensator ring pressure welding method according to claim 3, wherein: the first ring piece is arranged at the first side, the second ring piece is arranged at the second side, the metal corrugated pipe comprises a corrugated section located at the main body, and the arc-shaped portion is closely attached to the arc-shaped surface of the trough of the corrugated section.
5. The compensator ring pressure welding method according to claim 1, wherein: the first ring piece and the second ring piece are both made of metal materials.
6. The compensator ring pressure welding method according to claim 1, wherein: the two ends of the compensator are connected with the gas pipe through the clamps.
7. The compensator ring pressure welding method according to claim 1, wherein: still be equipped with the protective sheath, the protective sheath wraps the flexible pipe setting of elasticity, protective sheath one end fixed connection in interior pipe, the other end with the relative interval of outer tube sets up.
8. The compensator ring pressure welding method according to claim 7, wherein: the protective sleeve is made of stainless steel materials or plastic materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010859060.4A CN111975238A (en) | 2020-08-24 | 2020-08-24 | Compensator ring pressure welding method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010859060.4A CN111975238A (en) | 2020-08-24 | 2020-08-24 | Compensator ring pressure welding method |
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| CN111975238A true CN111975238A (en) | 2020-11-24 |
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| CN202010859060.4A Pending CN111975238A (en) | 2020-08-24 | 2020-08-24 | Compensator ring pressure welding method |
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63171292A (en) * | 1987-01-08 | 1988-07-15 | Ulvac Corp | Air tight welding method for very thin member and vacuum joint |
| CN201982828U (en) * | 2011-03-23 | 2011-09-21 | 成都共同管业有限公司 | Ring pressure spigot-and-socket type welding pipe fitting |
| CN102297309A (en) * | 2011-08-05 | 2011-12-28 | 上海永鑫波纹管有限公司 | Telescopic device of ultra-large caliber water-conducting pressure steel pipe of water power station and method for manufacturing corrugated pipe thereof |
| CN103775780A (en) * | 2012-10-25 | 2014-05-07 | 李敏 | Anti-torsion corrugated compensator |
| CN204176180U (en) * | 2014-06-18 | 2015-02-25 | 航天晨光股份有限公司 | A kind of nuclear power delivery hose |
| CN205579015U (en) * | 2016-05-06 | 2016-09-14 | 沈阳仪表科学研究院有限公司 | Effective corrugated metal tube swelling festival of falling liquid film |
| CN106641589A (en) * | 2016-12-19 | 2017-05-10 | 成都科瑞尔低温设备有限公司 | Micro-compensation end face flange |
| CN106931265A (en) * | 2015-12-31 | 2017-07-07 | 江苏晨光波纹管有限公司 | Ultralow temperature combines corrugated expansion joint |
| CN210319013U (en) * | 2018-03-22 | 2020-04-14 | 成都众远管业有限公司 | Gas pipeline compensator |
-
2020
- 2020-08-24 CN CN202010859060.4A patent/CN111975238A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63171292A (en) * | 1987-01-08 | 1988-07-15 | Ulvac Corp | Air tight welding method for very thin member and vacuum joint |
| CN201982828U (en) * | 2011-03-23 | 2011-09-21 | 成都共同管业有限公司 | Ring pressure spigot-and-socket type welding pipe fitting |
| CN102297309A (en) * | 2011-08-05 | 2011-12-28 | 上海永鑫波纹管有限公司 | Telescopic device of ultra-large caliber water-conducting pressure steel pipe of water power station and method for manufacturing corrugated pipe thereof |
| CN103775780A (en) * | 2012-10-25 | 2014-05-07 | 李敏 | Anti-torsion corrugated compensator |
| CN204176180U (en) * | 2014-06-18 | 2015-02-25 | 航天晨光股份有限公司 | A kind of nuclear power delivery hose |
| CN106931265A (en) * | 2015-12-31 | 2017-07-07 | 江苏晨光波纹管有限公司 | Ultralow temperature combines corrugated expansion joint |
| CN205579015U (en) * | 2016-05-06 | 2016-09-14 | 沈阳仪表科学研究院有限公司 | Effective corrugated metal tube swelling festival of falling liquid film |
| CN106641589A (en) * | 2016-12-19 | 2017-05-10 | 成都科瑞尔低温设备有限公司 | Micro-compensation end face flange |
| CN210319013U (en) * | 2018-03-22 | 2020-04-14 | 成都众远管业有限公司 | Gas pipeline compensator |
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Application publication date: 20201124 |
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