CN105834615B - A kind of hand prevents the device of welding necking down - Google Patents
A kind of hand prevents the device of welding necking down Download PDFInfo
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- CN105834615B CN105834615B CN201510023582.XA CN201510023582A CN105834615B CN 105834615 B CN105834615 B CN 105834615B CN 201510023582 A CN201510023582 A CN 201510023582A CN 105834615 B CN105834615 B CN 105834615B
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Abstract
The invention discloses the devices that a kind of hand prevents welding necking down, belong to petroleum pipeline construction field.The hand prevents the device of welding necking down to be mounted on pipeline, described device includes heating mechanism, welding protective layer and supporting mechanism, the heating mechanism is used to provide thermal energy to the pipeline and provides preheating and heat preservation for the pipeline welding position, the welding protective layer is arranged in the pipeline welding position, the welding protective layer is kept the temperature for the pipeline welding position, the supporting mechanism is arranged on the pipeline, and the supporting mechanism is used to support the pipeline welding bead and is kept the temperature for it.The present invention by above structure will heat, heat preservation and expanding function together as one, fundamentally solve the welding deformation problems of pipeline and equipment, it is possible to prevente effectively from the welding position deformation caused by temperature difference when welding, improve the welding quality of welding position, welding efficiency is improved, and the necking section having occurred and that can be restored.
Description
Technical field
The present invention relates to petroleum pipeline construction field, more particularly to a kind of hand prevents the device of welding necking down.
Background technology
Welding necking down refers to that the weld seam position contraction that pipeline and equipment occur during circumferential direction welds causes part half
The phenomenon that diameter reduces.Specifically the origin cause of formation is：Pipeline and equipment can generate a large amount of heat in welding process in welding position, when welding
Metal in molten bath is in molten condition, and temperature is up to 1000 degree or more, and weld seam position is quick in air after welding
It is cooled to room temperature, certain deformation will occur under the action of the temperature difference for this part metals.When thermal weld stress is big, welding base metal wall
When thicker, different-metal material welding, deflection will be further increased.These deformations will cause the size of pipeline or equipment to occur
Deviation, or even directly result in weld seam and its cracking of adjacent domain.These damage would become hard to once being formed by other means into
Row restores, it will usually lead to scrapping for existing procucts.
Mode one：To being subtracted as possible using reducing heat input, the means such as be symmetrically welded in the welding procedure of necking down sensitive material
Light necking.Mode two：Destressing processing is carried out to pipeline or equipment welding position by heat treatment, to avoid due to
The Cracking Failure hidden danger that stress concentration is brought.
In the implementation of the present invention, the inventor finds that the existing technology has at least the following problems：
Using aforesaid way one and mode two, there is a problem of that welding efficiency is low；Since aforesaid way can only slow down
The tendency of necking down, and can not fundamentally avoid the occurrence of necking down, improve the welding quality of welding position；Work as necking
It can not also be restored through these means after occurring.
Invention content
It is low in order to solve welding efficiency of the existing technology, the welding quality of welding position, and contracting can not be improved
The problem of neck can not be repaired after occurring, an embodiment of the present invention provides the devices that a kind of hand prevents welding necking down.The skill
Art scheme is as follows：
A kind of hand prevents the device of welding necking down, is mounted on pipeline, and the hand prevents the dress of welding necking down
Set including：Heating mechanism, welding protective layer and supporting mechanism,
The heating mechanism is used to provide thermal energy to the pipeline and provides preheating and heat preservation for the pipeline welding position,
In the pipeline welding position, the welding protective layer is used for the pipeline weld part for the welding protective layer setting
Position heat preservation,
The supporting mechanism is arranged on the pipeline, and the supporting mechanism is used to support the pipeline welding bead and is protected for it
Temperature, the supporting mechanism are hand supporting mechanism.
Preferably, the supporting mechanism includes：Handwheel, locating rack, clamp spring, connecting rod, screw rod, the first nut, the second spiral shell
Mother, 2N supporting rod, N number of supporting block and N number of heat insulating block, the 2N supporting rod, N number of supporting block and N number of heat preservation
Block matches, wherein N >=3,
In the pipeline external, the handwheel is used to provide rotary power for the handwheel setting,
The locating rack is sleeved on the pipeline end face and is fixed with the pipeline, and the locating rack is described manual for fixing
Formula prevents the device of welding necking down,
The clamp spring is arranged in the locating rack, and the clamp spring is positioned for the connecting rod,
Described connecting rod one end is fixed with the handwheel, and the connecting rod other end passes through the locating rack and the screw rod
Fixed, the screw rod includes the first thread segment and the second thread segment, and first thread segment and the second thread segment are oppositely oriented, institute
It states the first nut and is mounted on first thread segment, first nut is meshed with first thread segment, second spiral shell
Mother is mounted on second thread segment, and second nut is meshed with second thread segment,
The 2N supporting rod is symmetricly set on the screw rod both ends, in the 2N supporting rod N number of supporting rod setting exist
First thread segment and the relatively described screw axis are uniformly distributed, each supporting rod one end in N number of supporting rod and described the
One nut is flexibly connected, the corresponding supporting block flexible connection of each supporting rod other end in N number of supporting rod,
In addition the setting of N number of supporting rod is evenly distributed in second thread segment and the relatively described screw axis in the 2N supporting rod, described
In addition each supporting rod one end in N number of supporting rod is flexibly connected with second nut, every in addition N number of supporting rod
The corresponding supporting block flexible connection of a supporting rod other end,
Two axially adjacent supporting rods share a supporting block and a heat insulating block, the heat insulating block
It is arranged above the corresponding supporting block,
Working condition, the locating rack are fixed on the pipe end, and the connecting rod and the screw rod stretch into the pipe
Inside road, the screw rod corresponds to the pipeline welding position, rotates the handwheel and drives the screw rod to rotate through the connecting rod,
First nut is driven to be engaged with first thread segment, second nut is engaged with second thread segment so that institute
Supporting rod swing is stated, so that the supporting block is fitted on the pipeline welding bead.
Preferably, the locating rack includes the first positioning plate, the second positioning plate, fixing bolt and bolt, and described first is fixed
Position plate is plectane, and first positioning plate is equipped with through-hole and multiple first positioning holes, and the through-hole is used to accommodate the clamp spring,
Second positioning plate is the plectane that border carries flange, and the flange is for being sleeved on the pipeline end face, the fixing bolt
It is arranged on the flange, the fixing bolt is used for the fixation of the locating rack and the pipeline, and second positioning plate is set
There are multiple second location holes, the multiple second location hole to match with the multiple first positioning hole, the bolt is inserted into institute
It states in first positioning hole and the second location hole, the different first positioning holes and described second is inserted by the bolt
Location hole realizes that the diameter of the locating rack is adjusted.
Preferably, the connecting rod carries scale.
Preferably, the heating mechanism is resistive heating mechanism, electrical induction mechanism or spray gun.
Preferably, the heating mechanism is resistive heating mechanism, and the heating mechanism includes electric heating temperature control case, cable and N
A electric heating block, the electric heating temperature control case by N number of electric heating block described in the cable connection, N number of electric heating block with described N number of
Bracer matches, and the electric heating block is arranged above the supporting block.
Preferably, the heating mechanism is electrical induction mechanism, and the electrical induction mechanism is arranged in the welding
Below protective layer.
Preferably, the welding protective layer is made of thermal insulation material.
Preferably, the welding protective layer is rock wool layer, calcium silicate layer, glass layer of cloth or fire brick layer.
The advantageous effect that technical solution provided in an embodiment of the present invention is brought is：
The present invention is heated by heating mechanism for the pipeline, is kept the temperature, is led to for pipeline welding position by welding protective layer
It crosses supporting mechanism supporting pipeline welding bead and realizes that expanding function, the present invention will heating, heat preservation and expanding function collection by above structure
It is integrated, fundamentally solves the welding deformation problems of pipeline and equipment, it is possible to prevente effectively from when welding caused by the temperature difference
Welding position deformation improves the welding quality of welding position, improves welding efficiency, and can be extensive to the necking section having occurred and that
It is multiple.
Description of the drawings
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for
For those of ordinary skill in the art, without creative efforts, other are can also be obtained according to these attached drawings
Attached drawing.
Fig. 1 is the apparatus structure schematic diagram that hand provided in an embodiment of the present invention prevents welding necking down；
Fig. 2 is the A-A cutaway view Amplified images in Fig. 1；
Fig. 3 is the B-B cutaway view Amplified images in Fig. 1；
Fig. 4 is the C-C cutaway view Amplified images in Fig. 1；
Fig. 5 is the D-D cutaway view Amplified images for removing clamp spring in Fig. 3.
Each symbolic indication meaning is as follows in Fig. 1-5：
I heating mechanisms,
II supporting mechanisms,
1 handwheel, 2 electric heating temperature control casees, 3 locating racks, 4 pipelines, 5 cable tubes, 6 connecting rods, 7 welding protective layers, 8 welding beads, 9 spiral shells
Bar, the first thread segments of 9A, the second thread segments of 9B, 10 supporting rods, 11 fixing bolts, 12 first positioning holes, 13 clamp springs, 14 electric heating
Block, 15 heat insulating blocks, 16 supporting blocks, 17 cables, 18 bolts, 19 first nuts, 20 second nuts, 21 first positioning plates, 22 second
Positioning plate, 23 flanges, 24 through-holes, 25 second location holes；
Specific implementation mode
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with attached drawing to embodiment party of the present invention
Formula is described in further detail.
As shown in Figure 1, the present invention provides the device that a kind of hand prevents welding necking down, it is mounted on pipeline 4, it is described
Hand prevent welding necking down device include：Heating mechanism I, welding protective layer 7 and supporting mechanism II,
The heating mechanism I is used to provide thermal energy to the pipeline 4 and provides preheating and guarantor for 4 welding position of the pipeline
Temperature,
In 4 welding position of the pipeline, the welding protective layer 7 is welded for the pipeline 4 for the setting of welding protective layer 7
Socket part position is kept the temperature,
The supporting mechanism II is arranged on the pipeline 4, and the supporting mechanism II is used to support 4 welding bead 8 of the pipeline
And kept the temperature for it, the supporting mechanism II is hand supporting mechanism.
The present invention is heated by heating mechanism I for the pipeline 4, is protected for 4 welding position of pipeline by welding protective layer 7
Temperature realizes that expanding function, the present invention will heat by above structure, and keep the temperature and expand by 4 welding bead 8 of supporting mechanism II supporting pipelines
Diameter function together as one fundamentally solves the welding deformation problems of pipeline and equipment, it is possible to prevente effectively from due to temperature when welding
Welding position deformation caused by difference, improves the welding quality of welding position, improves welding efficiency, and can be to having occurred and that contracting
Neck portion restores.
Preferably, as shown in Figure 1, referring also to Fig. 2 to Fig. 5, the present embodiment is illustrated based on Fig. 1, this implementation
In example, the hand prevents the device of welding necking down, and the supporting mechanism II includes：Handwheel 1, locating rack 3, clamp spring 13
(referring to Fig. 3), connecting rod 6, screw rod 9, the first nut 19, the second nut 20,2N supporting rod 10, N number of supporting block 16 are (referring to figure
4) and N number of heat insulating block 15 (referring to Fig. 4), the 2N supporting rod 10, N number of supporting block 16 (referring to Fig. 4) and N number of guarantor
Warm block 15 matches (referring to Fig. 4), wherein N >=3,
The handwheel 1 (referring also to Fig. 2) is arranged outside the pipeline 4, and the handwheel 1 is used to provide rotary power,
The locating rack 3 is sleeved on 4 end face of the pipeline and is fixed with the pipeline 4, and the locating rack 3 is for described in fixation
Hand prevents the device of welding necking down,
The clamp spring 13 (referring to Fig. 3) is arranged in the locating rack 3, and the clamp spring 13 (referring to Fig. 3) is used for the company
Extension bar 6 positions,
6 one end of the connecting rod and the handwheel 1 are fixed, 6 other end of the connecting rod pass through the locating rack 3 with it is described
Screw rod 9 is fixed, and the screw rod 9 includes the first thread segment 9A and the second thread segment 9B, the first thread segment 9A and the second screw thread
Section 9B is oppositely oriented, and first nut 19 is mounted on the first thread segment 9A, first nut 19 and first spiral shell
Line section 9A is meshed, and second nut 20 is mounted on the second thread segment 9B, second nut 20 and described second
Thread segment 9B is meshed,
The 2N supporting rod 10 is symmetricly set on 9 both ends of the screw rod, N number of supporting rod 10 in the 2N supporting rod 10
It is arranged in the first thread segment 9A and relatively described 9 axis of screw rod is uniformly distributed, each supporting rod 10 in N number of supporting rod 10
One end is flexibly connected with first nut 19, and 10 other end of each supporting rod in N number of supporting rod 10 is corresponding
The supporting block 16 (referring to Fig. 4) is flexibly connected, and in addition N number of supporting rod 10 is arranged described second in the 2N supporting rod 10
Thread segment 9B and relatively described 9 axis of screw rod are uniformly distributed, 10 one end of each supporting rod in addition N number of supporting rod 10 with it is described
Second nut 20 is flexibly connected, the corresponding branch of 10 other end of each supporting rod in addition N number of supporting rod 10
Bracer 16 (referring to Fig. 4) is flexibly connected,
Two axially adjacent supporting rods 10 share a supporting block 16 (referring to Fig. 4) and a heat preservation
Block 15 (referring to Fig. 4), the heat insulating block 15 are arranged (referring to Fig. 4) above the corresponding supporting block 16 (referring to Fig. 4),
Working condition, the locating rack 3 are fixed on 4 end of the pipeline, and the connecting rod 6 and the screw rod 9 stretch into institute
State inside pipeline 4, the screw rod 9 corresponds to 4 welding position of the pipeline, rotate the handwheel 1 driven through the connecting rod 6 it is described
Screw rod 9 rotates, and drives first nut 19 to be engaged with the first thread segment 9A, second nut 20 and second spiral shell
Line section 9B engagements so that the supporting rod 10 is swung, so that the supporting block 16 is fitted in the pipeline 4 (referring to Fig. 4)
On welding bead 8.
Above structure uses manual actuation, reaches energy-saving effect, is driven by screw rod 9 so that stable drive, passes through support
The support of bar 10 achievees the effect that support is firm.
Preferably, as shown in Figure 1, the heating mechanism I is resistive heating mechanism, electrical induction mechanism, spray gun or adopts
It is heated with other heat sources.
Further, as shown in Figure 1, in the present embodiment, the heating mechanism I is resistive heating mechanism, the heater
Structure I includes electric heating temperature control case 2, cable 17 and N number of electric heating block 14, and the electric heating temperature control case 2 connects the N by the cable 17
A electric heating block 14, N number of electric heating block 14 match with N number of supporting block 16, and the electric heating block 14 is arranged in the support
16 top of block.More specifically, in the present embodiment, electric heating block 14 and heat insulating block 15 are pressed together on 4 inner wall of pipeline by supporting block 16.
By above-mentioned resistive heating mechanism structural behaviour is stablized, the efficiency of heating surface is high.
In the present embodiment, referring to Fig. 1, the heating mechanism I can also be electrical induction mechanism, the electrical induction
Mechanism is arranged below the welding protective layer 7.Further, the electrical induction mechanism is electromagnetic induction heater.
In the present embodiment, 15 preferred insulation quilt block of heat insulating block passes through above structure so that simple in structure to be easily achieved.More
Further, the cable 17 is through in cable tube 5, is effectively protected cable 17, and cable 17 is avoided to damage.
In the present embodiment, as shown in Figure 1, the supporting rod 10 and first nut 19, second nut 20 and institute
The flexible connection for stating supporting block 16 is shaft connection.Pass through above structure so that have the advantages of simple structure and easy realization.
Certainly, it will appreciated by the skilled person that flexible connection can also be hinged or axis pin connection.
Preferably, as shown in figure 5, the locating rack 3 includes the first positioning plate 21, the second positioning plate 22, fixing bolt 11
And bolt 18, first positioning plate 21 are plectane, first positioning plate 21 is equipped with through-hole 24 and multiple first positioning holes
12, for the through-hole 24 for accommodating the clamp spring 13, second positioning plate 22 is the plectane that border carries flange 23, described convex
Edge 23 is arranged for being sleeved on 4 end face of the pipeline, the fixing bolt 11 on the flange 23, and the fixing bolt 11 is used for
The fixation of the locating rack 3 and the pipeline 4, second positioning plate 22 are equipped with multiple second location holes 25, and the multiple the
Two location holes 25 match with the multiple first positioning hole 12, and the bolt 18 is inserted into the first positioning hole 12 and described
In two location holes 25, the different first positioning holes 12 is inserted by the bolt 18 and the second location hole 25 realizes institute
The diameter for stating locating rack 3 is adjusted.
In the present embodiment, the radius of locating rack 3 can be adjusted by first positioning hole 12 and second location hole 25, works as adjusting
The position of first positioning hole 12 and second location hole 25, with bolt 18 by first when keeping 23 internal diameter of flange and 4 outer diameter of pipeline close
The positioning of location hole 12 and second is fixed, and by being tightened, locating rack 3 is fixed on (referring to Fig. 1) on pipeline 4 by bolt 11, is passed through
Above structure improves the versatility of locating rack 3.
In the present embodiment, the center of handwheel 1 can also be fixed on by locating rack 3 by 4 center of pipeline, improve transmission
Stability.
As shown in figure 3, first positioning hole 12, according to cross setting, corresponding second location hole 25 is also set according to cross
It sets, not only reduces manufacturing cost using the above structure, and improve the uniformity of stress, improve structural stability.
Preferably, as shown in Figure 1, the welding protective layer 7 is made of thermal insulation material.Closer, the welding
Protective layer 7 is made of resistance to 500 degree or more of thermal insulation material.
Further, as shown in Figure 1, the welding protective layer 7 is rock wool layer, calcium silicate layer, glass layer of cloth or refractory brick
Layer.
Further, as shown in Figure 1, the welding protective layer 7 is coated on the work that 4 outer wall of the pipeline plays heat preservation and protection
With.
Preferably, as shown in Figure 1, the connecting rod 6 carries scale.By with the calibration gauge in graduated connecting rod 6
Amount, facilitates supporting rack being pushed into 8 position of welding bead.
Closer, shown in Figure 3, connecting rod 6 is equipped with groove, in the present embodiment, passes through the clamp spring of clamp spring 13
The position of 6 upper groove of connecting rod is fixed in hole, the position rotated to fixed handwheel 1.So that having the advantages of simple structure and easy realization.
As shown in Figure 1, the course of work of the present invention is as follows：
1) after the welding bead 8 of pipeline 4 being carried out backing welding or spot welding fixation, connecting rod 6, screw rod 9 and supporting rod 10 are put into
Inside pipeline 4, so that 10 diameter of supporting rod is slightly less than 4 internal diameter of pipeline by rotary screw 9, the locating rack 3 of 4 end of pipeline is consolidated
It is fixed；
2) supporting rod 10 is pushed by 8 position of welding bead by connecting rod 6 with a scale, when handwheel 1 along rotate clockwise when, band
Dynamic connecting rod 6 and screw rod 9 rotate in the same direction together, the first nut 19 being connect in this role with screw rod 9 and the second spiral shell
Mother 20 moves closer to, and 10 inclination angle of supporting rod gradually increases until supporting block 16 is fitted on welding bead 8, i.e., supporting block 16 is closely propped up
4 inner wall of pipeline in 8 position of welding bead is supportted, is fixed the position of handwheel 1 by clamp spring 13, to keep the support of supporting block 16 to make
With；
3) connecting cable 17, and wrapped up around welding bead 8, fixed welding protective layer 7, it is connected to noble gas protective device；
4) start welding after being energized to preset temperature；
5) welding protective layer 7 is also covered on 8 surface of welding bead after the completion of welding, is powered off after continuing energization heat preservation 1 hour, waits for temperature
Degree is to 50 degree hereinafter, removing welding protective layer 7；
6) clamp spring 13 is unclamped, the radius for making supporting rod 10 be formed by rotary screw 9 reduces, and supporting rod 10 is drawn into pipe
Locating rack 3 is nearby unclamped in 4 end of road, takes out package unit of the present invention.
The embodiments of the present invention are for illustration only, can not represent the quality of embodiment.
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all the present invention spirit and
Within principle, any modification, equivalent replacement, improvement and so on should all be included in the protection scope of the present invention.
Claims (8)
1. a kind of hand prevents the device of welding necking down, it is mounted on pipeline, which is characterized in that the hand prevents from welding
The device of necking down includes：Heating mechanism, welding protective layer and supporting mechanism,
The heating mechanism is used to provide thermal energy to the pipeline and provides preheating and heat preservation for the pipeline welding position,
In the pipeline welding position, the welding protective layer is protected for the pipeline welding position for the welding protective layer setting
Temperature,
The supporting mechanism is arranged on the pipeline, and the supporting mechanism is used to support the pipeline welding bead and is kept the temperature for it,
The supporting mechanism is hand supporting mechanism；Wherein,
The supporting mechanism includes：Handwheel, locating rack, clamp spring, connecting rod, screw rod, the first nut, the second nut, 2N support
Bar, N number of supporting block and N number of heat insulating block, the 2N supporting rod, N number of supporting block and N number of heat insulating block match,
In, N >=3,
In the pipeline external, the handwheel is used to provide rotary power for the handwheel setting,
The locating rack is sleeved on the pipeline end face and is fixed with the pipeline, and the locating rack is anti-for fixing the hand
The device of necking down is only welded,
The clamp spring is arranged in the locating rack, and the clamp spring is positioned for the connecting rod,
Described connecting rod one end is fixed with the handwheel, and the connecting rod other end passes through the locating rack solid with the screw rod
Fixed, the screw rod includes the first thread segment and the second thread segment, and first thread segment and the second thread segment are oppositely oriented, described
First nut is mounted on first thread segment, and first nut is meshed with first thread segment, second nut
On second thread segment, second nut is meshed with second thread segment,
The 2N supporting rod is symmetricly set on the screw rod both ends, and N number of supporting rod is arranged described in the 2N supporting rod
First thread segment and the relatively described screw axis are uniformly distributed, each supporting rod one end in N number of supporting rod and first spiral shell
Mother is flexibly connected, the corresponding supporting block flexible connection of each supporting rod other end in N number of supporting rod, described
In addition the setting of N number of supporting rod is evenly distributed in second thread segment and the relatively described screw axis in 2N supporting rod, the other N
Each supporting rod one end in a supporting rod is flexibly connected with second nut, each branch in addition N number of supporting rod
The corresponding supporting block flexible connection of the strut other end,
Two axially adjacent supporting rods share a supporting block and a heat insulating block, the heat insulating block setting
Above the corresponding supporting block,
Working condition, the locating rack are fixed on the pipe end, and the connecting rod and the screw rod stretch into the pipeline
Portion, the screw rod correspond to the pipeline welding position, rotate the handwheel and drive the screw rod to rotate through the connecting rod, drive
First nut is engaged with first thread segment, second nut is engaged with second thread segment so that the branch
Strut is swung, so that the supporting block is fitted on the pipeline welding bead.
2. hand according to claim 1 prevents the device of welding necking down, which is characterized in that the locating rack includes the
One positioning plate, the second positioning plate, fixing bolt and bolt, first positioning plate are plectane, and first positioning plate is equipped with
Through-hole and multiple first positioning holes, the through-hole are border with flange for accommodating the clamp spring, second positioning plate
Plectane, the flange are arranged for being sleeved on the pipeline end face, the fixing bolt on the flange, and the fixing bolt is used
In the fixation of the locating rack and the pipeline, second positioning plate is equipped with multiple second location holes, and the multiple second is fixed
Position hole matches with the multiple first positioning hole, and the bolt is inserted into the first positioning hole and the second location hole,
It is inserted into the different first positioning holes by the bolt and the second location hole realizes the diameter of the locating rack
It adjusts.
3. hand according to claim 1 prevents the device of welding necking down, which is characterized in that the connecting rod is with quarter
Degree.
4. hand according to claim 1 prevents the device of welding necking down, which is characterized in that the heating mechanism is electricity
Hinder heating mechanism, electrical induction mechanism or spray gun.
5. hand according to claim 4 prevents the device of welding necking down, which is characterized in that the heating mechanism is electricity
Heating mechanism is hindered, the heating mechanism includes electric heating temperature control case, cable and N number of electric heating block, and the electric heating temperature control case passes through described
N number of electric heating block described in cable connection, N number of electric heating block match with N number of supporting block, and the electric heating block is arranged described
Above supporting block.
6. hand according to claim 4 prevents the device of welding necking down, which is characterized in that the heating mechanism is electricity
Sensing heating mechanism, the electrical induction mechanism are arranged below the welding protective layer.
7. the hand according to any one of claim 1-6 claims prevents the device of welding necking down, which is characterized in that
The welding protective layer is made of thermal insulation material.
8. hand according to claim 7 prevents the device of welding necking down, which is characterized in that the welding protective layer 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 |
|---|---|---|---|
| CN201510023582.XA CN105834615B (en) | 2015-01-16 | 2015-01-16 | A kind of hand prevents the device of welding necking down |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510023582.XA CN105834615B (en) | 2015-01-16 | 2015-01-16 | A kind of hand prevents the device of welding necking down |
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| Publication Number | Publication Date |
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| CN105834615A CN105834615A (en) | 2016-08-10 |
| CN105834615B true CN105834615B (en) | 2018-10-16 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107638991A (en) * | 2017-09-28 | 2018-01-30 | 高祥桐 | A kind of sealing device for internal diameter of the pipeline weld seam |
| CN107695597B (en) * | 2017-11-20 | 2019-05-17 | 毛思静 | A kind of natural gas line bonding machine |
| CN109402368A (en) * | 2018-12-21 | 2019-03-01 | 中国电建集团核电工程有限公司 | A kind of attemperator |
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| JP2008212994A (en) * | 2007-03-05 | 2008-09-18 | Toshiba Corp | Welding equipment and method thereof |
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| CN101264561A (en) * | 2008-05-05 | 2008-09-17 | 河北省电力研究院 | Pipeline welding inside heating method |
| CN201999968U (en) * | 2011-01-21 | 2011-10-05 | 上海电力安装第二工程公司 | Supporting device of heating plate for heat treatment of pipeline |
| CN102825402A (en) * | 2012-09-07 | 2012-12-19 | 中原特钢股份有限公司 | Preheating device for progressive welding of large-pipe-diameter casting pipe die |
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| CN105834615A (en) | 2016-08-10 |
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