CN204524591U - A kind of hand prevents the device welding necking down - Google Patents
A kind of hand prevents the device welding necking down Download PDFInfo
- Publication number
- CN204524591U CN204524591U CN201520032465.5U CN201520032465U CN204524591U CN 204524591 U CN204524591 U CN 204524591U CN 201520032465 U CN201520032465 U CN 201520032465U CN 204524591 U CN204524591 U CN 204524591U
- Authority
- CN
- China
- Prior art keywords
- welding
- pipeline
- support bar
- block
- thread segment
- 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.)
- Withdrawn - After Issue
Links
Abstract
The utility model discloses the device that a kind of hand prevents from welding necking down, belong to petroleum pipeline construction field.Described hand prevents the device welding necking down to be arranged on pipeline, described device comprises heating arrangements, welding overcoat and supporting mechanism, described heating arrangements is used for providing heat energy to described pipeline and providing preheating and insulation for described pipeline welding position, described welding overcoat is arranged on described pipeline welding position, described welding overcoat is used for the insulation of described pipeline welding position, described supporting mechanism is arranged on described pipeline, and described supporting mechanism is also its insulation for supporting described pipeline welding bead.Heating, insulation and expanding function are integrated by said structure by the utility model, fundamentally solve the welding deformation problems of pipeline and equipment, the welding position deformation caused due to the temperature difference when can effectively avoid welding, improve the welding quality of welding position, improve welding efficiency, and can recover the necking section occurred.
Description
Technical field
The utility model relates to petroleum pipeline construction field, and particularly a kind of hand prevents the device welding necking down.
Background technology
Welding necking down refers to that the phenomenon causing local radius to reduce is shunk at the weld seam position occurred in the process that pipeline and equipment weld at hoop.The concrete origin cause of formation is: pipeline and equipment can produce a large amount of heats in welding position in welding process, metal during welding in molten bath is in molten condition, temperatures as high more than 1000 degree, after welding terminates, weld seam position is cooled fast to room temperature in atmosphere, and this part metal certain distortion will occur under the effect of the temperature difference.When thermal weld stress is large, welding base metal wall thickness is thicker, different-metal material welding time, its deflection will increase further.These distortion will cause the size generation deviation of pipeline or equipment, even directly cause the cracking of weld seam and adjacent domain thereof.These damages, once formation is recovered being difficult to by other means, can cause scrapping of existing procucts usually.
Mode one: reduce that heat inputs, the means such as to be symmetrically welded alleviate necking to the welding procedure of necking down sensitive material adopts as far as possible.Mode two: carry out destressing process to pipeline or equipment welding position by heat treatment, to avoid the Cracking Failure hidden danger because extending stress band comes.
Realizing in process of the present utility model, inventor finds that prior art at least exists following problem:
Adopt aforesaid way one and mode two, all there is the problem that welding efficiency is low; Because aforesaid way can only slow down the tendency of necking down, and fundamentally cannot avoid the generation of necking down situation, improve the welding quality of welding position; Also cannot be recovered by these means after necking occurs.
Utility model content
In order to the welding efficiency solving prior art existence is low, the welding quality of welding position cannot be improved, and the problem cannot repaired after necking down generation, the utility model embodiment provides the device that a kind of hand prevents from welding necking down.Described technical scheme is as follows:
Hand prevents the device welding necking down, is arranged on pipeline, and described hand prevents the device welding necking down from comprising: heating arrangements, welding overcoat and supporting mechanism,
Described heating arrangements is used for providing heat energy to described pipeline and providing preheating and insulation for described pipeline welding position,
Described welding overcoat is arranged on described pipeline welding position, and described welding overcoat is used for the insulation of described pipeline welding position,
Described supporting mechanism is arranged on described pipeline, and described supporting mechanism is also its insulation for supporting described pipeline welding bead, and described supporting mechanism is hand supporting mechanism.
Preferably, described supporting mechanism comprises: handwheel, locating rack, jump ring, connecting rod, screw rod, the first nut, the second nut, a 2N support bar, N number of back-up block and N number of heat insulating block, and a described 2N support bar, described N number of back-up block and described N number of heat insulating block match, wherein, N >=3
Described handwheel is arranged on described pipeline external, and described handwheel is used for providing rotary power,
Described locating rack is enclosed within described pipeline end face and fixes with described pipeline, and described locating rack is used for the device that fixing described hand prevents from welding necking down,
Described jump ring is arranged in described locating rack, and described jump ring is used for described connecting rod location,
Described connecting rod one end and described handwheel are fixed, the described connecting rod other end is fixed through described locating rack and described screw rod, described screw rod comprises the first thread segment and the second thread segment, described first thread segment is contrary with the second thread segment rotation direction, described first nut is arranged on described first thread segment, and described first nut is meshed with described first thread segment, and described second nut is arranged on described second thread segment, described second nut is meshed with described second thread segment
A described 2N support bar is symmetricly set on described screw rod two ends, in a described 2N support bar N number of support bar be arranged on described first thread segment and relatively described screw axis uniform, each support bar one end in described N number of support bar is flexibly connected with described first nut, the described back-up block that each support bar other end in described N number of support bar is corresponding with it is flexibly connected, in a described 2N support bar other N number of support bar be arranged on described second thread segment and relatively described screw axis uniform, each support bar one end in described other N number of support bar is flexibly connected with described second nut, the described back-up block that each support bar other end in described other N number of support bar is corresponding with it is flexibly connected,
Two axially adjacent described support bars share a described back-up block and a described heat insulating block, and described heat insulating block is arranged on above the described back-up block corresponding with it,
Duty, described locating rack is fixed on described pipe end, described connecting rod and described screw rod stretch into described pipe interior, the corresponding described pipeline welding position of described screw rod, rotating described handwheel drives described screw rod to rotate through described connecting rod, drive described first nut to engage with described first thread segment, described second nut engages with described second thread segment, described support bar is swung, and then described back-up block is fitted on described pipeline welding bead.
Preferably, described locating rack comprises the first location-plate, second location-plate, set bolt and latch, described first location-plate is plectane, described first location-plate is provided with through hole and multiple first locating hole, described through hole is for holding described jump ring, described second location-plate is the plectane of border with flange, described flange is used for being enclosed within described pipeline end face, described set bolt is arranged on described flange, described set bolt is used for fixing of described locating rack and described pipeline, described second location-plate is provided with multiple second locating hole, described multiple second locating hole and described multiple first locating hole match, described latch inserts in described first locating hole and described second locating hole, insert by described latch the diameter that different described first locating holes and described second locating hole realize described locating rack to regulate.
Preferably, described connecting rod is with scale.
Preferably, described heating arrangements is resistive heating mechanism, electrical induction mechanism or spray gun.
Preferably, described heating arrangements is resistive heating mechanism, described heating arrangements comprises electric heating temperature control case, cable and N number of electric heating block, described electric heating temperature control case connects described N number of electric heating block by described cable, described N number of electric heating block and described N number of back-up block match, and described electric heating block is arranged on above described back-up block.
Preferably, described heating arrangements is electrical induction mechanism, and described electrical induction organization establishes is below described welding overcoat.
Preferably, described welding overcoat adopts insulation material to make.
Preferably, described welding overcoat is rock wool layer, calcium silicate layer, glass layer of cloth or fire brick layer.
The beneficial effect that the technical scheme that the utility model embodiment provides is brought is:
The utility model is described pipeline heating by heating arrangements, by welding overcoat be pipeline welding position insulation, expanding function is realized by supporting mechanism supporting pipeline welding bead, heating, insulation and expanding function are integrated by said structure by the utility model, fundamentally solve the welding deformation problems of pipeline and equipment, the welding position deformation caused due to the temperature difference when can effectively avoid welding, improve the welding quality of welding position, improve welding efficiency, and can recover the necking section occurred.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in the utility model embodiment, below the accompanying drawing used required in describing embodiment is briefly described, apparently, accompanying drawing in the following describes is only embodiments more of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the apparatus structure schematic diagram that hand that the utility model embodiment provides prevents from welding necking down;
Fig. 2 is the A-A cutaway view Amplified image in Fig. 1;
Fig. 3 is the B-B cutaway view Amplified image in Fig. 1;
Fig. 4 is the C-C cutaway view Amplified image in Fig. 1;
Fig. 5 is the D-D cutaway view Amplified image removing jump ring in Fig. 3.
In Fig. 1-5, each symbol represents that implication is as follows:
I heating arrangements,
II supporting mechanism,
1 handwheel, 2 electric heating temperature control casees, 3 locating racks, 4 pipelines, 5 cable tubes, 6 connecting rods, 7 welding overcoats, 8 welding beads, 9 screw rods, 9A first thread segment, 9B second thread segment, 10 support bars, 11 set bolts, 12 first locating holes, 13 jump rings, 14 electric heating blocks, 15 heat insulating blocks, 16 back-up blocks, 17 cables, 18 latches, 19 first nuts, 20 second nuts, 21 first location-plates, 22 second location-plates, 23 flanges, 24 through holes, 25 second locating holes;
Detailed description of the invention
For making the purpose of this utility model, technical scheme and advantage clearly, below in conjunction with accompanying drawing, the utility model embodiment is described in further detail.
As shown in Figure 1, the utility model provides the device that a kind of hand prevents from welding necking down, is arranged on pipeline 4, and described hand prevents the device welding necking down from comprising: heating arrangements I, welding overcoat 7 and supporting mechanism II,
Described heating arrangements I is used for providing heat energy to described pipeline 4 and providing preheating and insulation for described pipeline 4 welding position,
Described welding overcoat 7 is arranged on described pipeline 4 welding position, and described welding overcoat 7 is incubated for described pipeline 4 welding position,
Described supporting mechanism II is arranged on described pipeline 4, and described supporting mechanism II is also its insulation for supporting described pipeline 4 welding bead 8, and described supporting mechanism II is hand supporting mechanism.
The utility model is that described pipeline 4 heats by heating arrangements I, by welding overcoat 7 be pipeline 4 welding position be incubated, expanding function is realized by supporting mechanism II supporting pipeline 4 welding bead 8, heating, insulation and expanding function are integrated by said structure by the utility model, fundamentally solve the welding deformation problems of pipeline and equipment, the welding position deformation caused due to the temperature difference when can effectively avoid welding, improve the welding quality of welding position, improve welding efficiency, and can recover the necking section occurred.
Preferably, as shown in Figure 1, can also see Fig. 2 to Fig. 5, the present embodiment take Fig. 1 as main being illustrated, in the present embodiment, described hand prevents the device welding necking down, described supporting mechanism II comprises: handwheel 1, locating rack 3, jump ring 13 (see Fig. 3), connecting rod 6, screw rod 9, first nut 19, second nut 20, 2N support bar 10, N number of back-up block 16 (see Fig. 4) and N number of heat insulating block 15 (see Fig. 4), a described 2N support bar 10, described N number of back-up block 16 (see Fig. 4) and described N number of heat insulating block 15 (see Fig. 4) match, wherein, N >=3,
It is outside that described handwheel 1 (also can see Fig. 2) is arranged on described pipeline 4, described handwheel 1 for providing rotary power,
Described locating rack 3 is enclosed within described pipeline 4 end face and fixes with described pipeline 4, and described locating rack 3 prevents for fixing described hand the device welding necking down,
Described jump ring 13 (see Fig. 3) is arranged in described locating rack 3, and described jump ring 13 (see Fig. 3) is located for described connecting rod 6,
Described connecting rod 6 one end and described handwheel 1 are fixed, described connecting rod 6 other end is fixed through described locating rack 3 and described screw rod 9, described screw rod 9 comprises the first thread segment 9A and the second thread segment 9B, described first thread segment 9A is contrary with the second thread segment 9B rotation direction, described first nut 19 is arranged on described first thread segment 9A, described first nut 19 is meshed with described first thread segment 9A, described second nut 20 is arranged on described second thread segment 9B, described second nut 20 is meshed with described second thread segment 9B
A described 2N support bar 10 is symmetricly set on described screw rod 9 two ends, in a described 2N support bar 10 N number of support bar 10 be arranged on described first thread segment 9A and relatively described screw rod 9 axis uniform, each support bar 10 one end in described N number of support bar 10 is flexibly connected with described first nut 19, the described back-up block 16 (see Fig. 4) that each support bar 10 other end in described N number of support bar 10 is corresponding with it is flexibly connected, in a described 2N support bar 10 other N number of support bar 10 be arranged on described second thread segment 9B and relatively described screw rod 9 axis uniform, each support bar 10 one end in described other N number of support bar 10 is flexibly connected with described second nut 20, the described back-up block 16 (see Fig. 4) that each support bar 10 other end in described other N number of support bar 10 is corresponding with it is flexibly connected,
Axially adjacent two described support bars 10 share a described back-up block 16 (see Fig. 4) and a described heat insulating block 15 (see Fig. 4), described heat insulating block 15 (see Fig. 4) is arranged on described back-up block 16 (see Fig. 4) top corresponding with it
Duty, described locating rack 3 is fixed on described pipeline 4 end, it is inner that described connecting rod 6 and described screw rod 9 stretch into described pipeline 4, corresponding described pipeline 4 welding position of described screw rod 9, rotating described handwheel 1 drives described screw rod 9 to rotate through described connecting rod 6, drive described first nut 19 to engage with described first thread segment 9A, described second nut 20 engages with described second thread segment 9B, described support bar 10 is swung, and then described back-up block 16 (see Fig. 4) is fitted on described pipeline 4 welding bead 8.
Said structure adopts manual actuation, reaches energy-saving effect, makes stable drive by screw rod 9 transmission, supports to reach to support firm effect by support bar 10.
Preferably, as shown in Figure 1, described heating arrangements I be resistive heating mechanism, electrical induction mechanism, spray gun or adopt other heat source.
Further, as shown in Figure 1, in the present embodiment, described heating arrangements I is resistive heating mechanism, described heating arrangements I comprises electric heating temperature control case 2, cable 17 and N number of electric heating block 14, described electric heating temperature control case 2 connects described N number of electric heating block 14 by described cable 17, and described N number of electric heating block 14 matches with described N number of back-up block 16, and described electric heating block 14 is arranged on above described back-up block 16.More specifically, in the present embodiment, electric heating block 14 and heat insulating block 15 are pressed together on pipeline 4 inwall by back-up block 16.
By above-mentioned resistive heating mechanism, structural behaviour is stablized, the efficiency of heating surface is high.
In the present embodiment, see Fig. 1, described heating arrangements I can also be electrical induction mechanism, and described electrical induction organization establishes is below described welding overcoat 7.Further, described electrical induction mechanism is electromagnetic induction heater.
In the present embodiment, heat insulating block 15 is insulation quilt block preferably, by said structure, makes structure simply be easy to realize.Further, described cable 17 is through in cable tube 5, effectively protects cable 17, avoids cable 17 to damage.
In the present embodiment, as shown in Figure 1, described support bar 10 is rotating shaft with the flexible connection of described first nut 19, described second nut 20 and described back-up block 16 and is connected.By said structure, make structure simple, be easy to realize.
Certainly, one of ordinary skill in the art will appreciate that, flexible connection can also be hinged or pinned connection.
Preferably, as shown in Figure 5, described locating rack 3 comprises the first location-plate 21, second location-plate 22, set bolt 11 and latch 18, described first location-plate 21 is plectane, described first location-plate 21 is provided with through hole 24 and multiple first locating hole 12, described through hole 24 is for holding described jump ring 13, described second location-plate 22 is the plectane of border with flange 23, described flange 23 is for being enclosed within described pipeline 4 end face, described set bolt 11 is arranged on described flange 23, described set bolt 11 is fixing for described locating rack 3 and described pipeline 4, described second location-plate 22 is provided with multiple second locating hole 25, described multiple second locating hole 25 matches with described multiple first locating hole 12, described latch 18 inserts in described first locating hole 12 and described second locating hole 25, insert by described latch 18 diameter that different described first locating holes 12 and described second locating hole 25 realize described locating rack 3 to regulate.
In the present embodiment, the radius of locating rack 3 can be regulated by the first locating hole 12 and the second locating hole 25, when the position of adjustment first locating hole 12 and the second locating hole 25, make flange 23 internal diameter and pipeline 4 external diameter close to time with latch 18, first locating hole 12 and second are located fixing, by being tightened, locating rack 3 (see Fig. 1) is fixed on pipeline 4 by bolt 11, by said structure, improve the versatility of locating rack 3.
In the present embodiment, the center of handwheel 1 can also be fixed on pipeline 4 center by locating rack 3, improve the stability of transmission.
As shown in Figure 3, the first locating hole 12 is according to cross setting, and corresponding second locating hole 25 is also arranged according to cross, adopts said structure to not only reduce manufacturing cost, and improves stressed uniformity, improve structural stability.
Preferably, as shown in Figure 1, described welding overcoat 7 adopts insulation material to make.Closer, described welding overcoat 7 adopts the insulation material of resistance to more than 500 degree to make.
Further, as shown in Figure 1, described welding overcoat 7 is rock wool layer, calcium silicate layer, glass layer of cloth or fire brick layer.
Further, as shown in Figure 1, described welding overcoat 7 be coated on described pipeline 4 outer wall play a part insulation and protection.
Preferably, as shown in Figure 1, described connecting rod 6 is with scale.By with the cup scale metered on graduated connecting rod 6, conveniently bracing frame is pushed into welding bead 8 position.
Closer, shown in Figure 3, connecting rod 6 is provided with groove, in the present embodiment, is fixed the position of connecting rod 6 upper groove by the clamp spring hole of jump ring 13, thus the position that fixing handwheel 1 rotates.Make structure simple, be easy to realize.
As shown in Figure 1, utility model works process is as follows:
1) welding bead 8 of pipeline 4 is carried out backing welding or spot welding fixing after, connecting rod 6, screw rod 9 and support bar 10 are put into pipeline 4 inner, make support bar 10 diameter be slightly less than pipeline 4 internal diameter by rotary screw 9, the locating rack 3 of pipeline 4 end is fixed;
2) by connecting rod 6 with a scale, support bar 10 is pushed into welding bead 8 position, when handwheel 1 is along when rotating clockwise, connecting rod 6 is driven to rotate in the same direction together with screw rod 9, under this effect the first nut 19 of being connected with screw rod 9 and the second nut 20 close gradually, support bar 10 inclination angle increases until be fitted on welding bead 8 by back-up block 16 gradually, namely back-up block 16 is closely supported on pipeline 4 inwall of welding bead 8 position, fixed by the position of jump ring 13 by handwheel 1, to keep the supporting role of back-up block 16;
3) stube cable 17, and wrap up around welding bead 8, fixing welding overcoat 7, be communicated with noble gas protective device;
4) welding is started after being energized to preset temperature;
5) welding also covers welding overcoat 7 on welding bead 8 surface after completing, and continues energising insulation power-off after 1 hour, when the temperature to less than 50 degree, removes welding overcoat 7;
6) unclamp jump ring 13, radius support bar 10 being formed by rotary screw 9 reduces, and is drawn into by support bar 10 near pipeline 4 end and is unclamped by locating rack 3, take out package unit described in the utility model.
Above-mentioned the utility model embodiment sequence number, just to describing, does not represent the quality of embodiment.
The foregoing is only preferred embodiment of the present utility model, not in order to limit the utility model, all within spirit of the present utility model and principle, any amendment done, equivalent replacement, improvement etc., all should be included within protection domain of the present utility model.
Claims (9)
1. hand prevents the device welding necking down, is arranged on pipeline, it is characterized in that, described hand prevents the device welding necking down from comprising: heating arrangements, welding overcoat and supporting mechanism,
Described heating arrangements is used for providing heat energy to described pipeline and providing preheating and insulation for described pipeline welding position,
Described welding overcoat is arranged on described pipeline welding position, and described welding overcoat is used for the insulation of described pipeline welding position,
Described supporting mechanism is arranged on described pipeline, and described supporting mechanism is also its insulation for supporting described pipeline welding bead, and described supporting mechanism is hand supporting mechanism.
2. hand according to claim 1 prevents the device welding necking down, it is characterized in that, described supporting mechanism comprises: handwheel, locating rack, jump ring, connecting rod, screw rod, the first nut, the second nut, a 2N support bar, N number of back-up block and N number of heat insulating block, a described 2N support bar, described N number of back-up block and described N number of heat insulating block match, wherein, N >=3
Described handwheel is arranged on described pipeline external, and described handwheel is used for providing rotary power,
Described locating rack is enclosed within described pipeline end face and fixes with described pipeline, and described locating rack is used for the device that fixing described hand prevents from welding necking down,
Described jump ring is arranged in described locating rack, and described jump ring is used for described connecting rod location,
Described connecting rod one end and described handwheel are fixed, the described connecting rod other end is fixed through described locating rack and described screw rod, described screw rod comprises the first thread segment and the second thread segment, described first thread segment is contrary with the second thread segment rotation direction, described first nut is arranged on described first thread segment, and described first nut is meshed with described first thread segment, and described second nut is arranged on described second thread segment, described second nut is meshed with described second thread segment
A described 2N support bar is symmetricly set on described screw rod two ends, in a described 2N support bar N number of support bar be arranged on described first thread segment and relatively described screw axis uniform, each support bar one end in described N number of support bar is flexibly connected with described first nut, the described back-up block that each support bar other end in described N number of support bar is corresponding with it is flexibly connected, in a described 2N support bar other N number of support bar be arranged on described second thread segment and relatively described screw axis uniform, each support bar one end in described other N number of support bar is flexibly connected with described second nut, the described back-up block that each support bar other end in described other N number of support bar is corresponding with it is flexibly connected,
Two axially adjacent described support bars share a described back-up block and a described heat insulating block, and described heat insulating block is arranged on above the described back-up block corresponding with it,
Duty, described locating rack is fixed on described pipe end, described connecting rod and described screw rod stretch into described pipe interior, the corresponding described pipeline welding position of described screw rod, rotating described handwheel drives described screw rod to rotate through described connecting rod, drive described first nut to engage with described first thread segment, described second nut engages with described second thread segment, described support bar is swung, and then described back-up block is fitted on described pipeline welding bead.
3. hand according to claim 2 prevents the device welding necking down, it is characterized in that, described locating rack comprises the first location-plate, second location-plate, set bolt and latch, described first location-plate is plectane, described first location-plate is provided with through hole and multiple first locating hole, described through hole is for holding described jump ring, described second location-plate is the plectane of border with flange, described flange is used for being enclosed within described pipeline end face, described set bolt is arranged on described flange, described set bolt is used for fixing of described locating rack and described pipeline, described second location-plate is provided with multiple second locating hole, described multiple second locating hole and described multiple first locating hole match, described latch inserts in described first locating hole and described second locating hole, insert by described latch the diameter that different described first locating holes and described second locating hole realize described locating rack to regulate.
4. hand according to claim 2 prevents the device welding necking down, and it is characterized in that, described connecting rod is with scale.
5. hand according to claim 1 prevents the device welding necking down, and it is characterized in that, described heating arrangements is resistive heating mechanism, electrical induction mechanism or spray gun.
6. hand according to claim 5 prevents the device welding necking down, it is characterized in that, described heating arrangements is resistive heating mechanism, described heating arrangements comprises electric heating temperature control case, cable and N number of electric heating block, described electric heating temperature control case connects described N number of electric heating block by described cable, described N number of electric heating block and described N number of back-up block match, and described electric heating block is arranged on above described back-up block.
7. hand according to claim 5 prevents the device welding necking down, and it is characterized in that, described heating arrangements is electrical induction mechanism, and described electrical induction organization establishes is below described welding overcoat.
8. the hand according to any one of claim 1-7 claim prevents the device welding necking down, it is characterized in that, described welding overcoat adopts insulation material to make.
9. hand according to claim 8 prevents the device welding necking down, and it is characterized in that, described welding overcoat is rock wool layer, calcium silicate layer, glass layer of cloth or fire brick layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520032465.5U CN204524591U (en) | 2015-01-16 | 2015-01-16 | A kind of hand prevents the device welding necking down |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520032465.5U CN204524591U (en) | 2015-01-16 | 2015-01-16 | A kind of hand prevents the device welding necking down |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204524591U true CN204524591U (en) | 2015-08-05 |
Family
ID=53738644
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520032465.5U Withdrawn - After Issue CN204524591U (en) | 2015-01-16 | 2015-01-16 | A kind of hand prevents the device welding necking down |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204524591U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105834615A (en) * | 2015-01-16 | 2016-08-10 | 中国石油天然气集团公司 | Manual-type device preventing necking during welding |
-
2015
- 2015-01-16 CN CN201520032465.5U patent/CN204524591U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105834615A (en) * | 2015-01-16 | 2016-08-10 | 中国石油天然气集团公司 | Manual-type device preventing necking during welding |
| CN105834615B (en) * | 2015-01-16 | 2018-10-16 | 中国石油天然气集团公司 | A kind of hand prevents the device of welding necking down |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105834603B (en) | A kind of self-action prevents from welding the device of necking down | |
| CN107755132B (en) | Metal pipe spraying method | |
| CN205851617U (en) | A kind of leading screw advances steel pipe medium-frequency pipe bender | |
| CN105834615B (en) | A kind of hand prevents the device of welding necking down | |
| US20110253677A1 (en) | Method and apparatus for preheating in welding operations | |
| CN204524591U (en) | A kind of hand prevents the device welding necking down | |
| CN201999968U (en) | Supporting device of heating plate for heat treatment of pipeline | |
| CN104319041A (en) | Umbrella skirt repairing device and umbrella skirt repairing method | |
| CN211889393U (en) | Device for processing end groove of built-in steel pipe of heat preservation pipe | |
| CN107012312A (en) | Segmented oxygen-eliminating device terminating girth joint heat treatment auxiliary device | |
| CN110340501A (en) | A kind of natural gas line welding procedure method | |
| CN206717317U (en) | A kind of weld heating device | |
| CN217224198U (en) | Steel pipe welding device | |
| CN208440677U (en) | A kind of Large Diameter Pipeline thin-wall tube post weld heat treatment device | |
| CN102489908B (en) | Prestressed elongation heating device for rapid cooling heat exchanger | |
| CN205817125U (en) | A kind of room is built and is preheated heater with underground piping | |
| CN107557541B (en) | Argon filling heating and heat preserving tool and method for 9% -12% Cr martensitic heat-resistant steel large-diameter thick-wall pipeline | |
| CN210160616U (en) | Movable high-strength steel penstock girth welding heating device | |
| CA2992234A1 (en) | Gas-fired heating apparatus for pipelines | |
| CN112176160A (en) | On-site composite heat treatment method for pipe connecting seat | |
| CN206200415U (en) | A kind of pipeline preheats heating and heat-insulating device | |
| US2160082A (en) | Apparatus and process for welding pipe | |
| CN207468684U (en) | A kind of tube sheet component and low head component girth joint local heat treatmet auxiliary device | |
| CN215316485U (en) | A heat preservation cloth support frame device that keeps out wind for boiler barrel is inside | |
| CN206768191U (en) | Segmented oxygen-eliminating device terminating girth joint heat treatment auxiliary device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20150805 Effective date of abandoning: 20181016 |