CN209578443U - A kind of Deep Hole Welding argon arc welding connects pipette tips - Google Patents
A kind of Deep Hole Welding argon arc welding connects pipette tips Download PDFInfo
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- CN209578443U CN209578443U CN201920272187.9U CN201920272187U CN209578443U CN 209578443 U CN209578443 U CN 209578443U CN 201920272187 U CN201920272187 U CN 201920272187U CN 209578443 U CN209578443 U CN 209578443U
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Abstract
The utility model discloses a kind of Deep Hole Welding argon arc weldings to connect pipette tips, the barral of a gun diameter of welding gun head is no more than 11mm, barral of a gun includes the contact tube as made of copper rod machining and the heatproof sleeve that is arranged on the outside of contact tube, conduction pipe orifice edge is axially arranged with longitudinal baffle, inner hole is divided into the upper half circular hole and lower half circular hole of disengaging cooling water by longitudinal baffle, it is axially disposed among longitudinal baffle to have protective gas through-hole pipe, conductive pipe orifice front end side passes through radial partition and longitudinal baffle is truncated, protective gas through-hole pipe passes through radial partition, protective gas through-hole pipe is provided with cooling water return flow line in radial membrane backside, it is close to cooling water return flow line and is provided with tungsten electrode locating piece in conductive pipe orifice front end, tungsten electrode fixation hole is axially provided in tungsten electrode locating piece perpendicular to contact tube, tungsten electrode is inserted into fixed in fixation hole, in tungsten electrode Tungsten electrode is provided with protective gas outflow chamber in locating piece, protective gas flows out chamber and connect perforation with protective gas through-hole pipe.
Description
Technical field
The utility model relates to a kind of Deep Hole Welding argon arc weldings to connect pipette tips, be one kind for high pressure heat exchanger tube sheet and change
The Deep Hole Welding argon arc welding of heat pipe butt welding connects pipette tips.
Background technique
High pressure heat exchanger is the important equipment in High-pressure Hydrogenation Unit, and working environment is harsh, is subjected to high temperature, height
Pressure, and bear to corrode caused by hydrogen, hydrogen sulfide etc. in operation medium.High pressure heat exchanger exchanger tubes and tubesheets all use angle before
Weld seam form, since fillet weld form stress is bad, often exchanger tubes and tubesheets weld seam in use goes wrong equipment.
In some middle pressure steam generators, tube head stress is larger and is influenced by tube side high-temperature medium, and end face welding structure is often sent out
Raw weld destroys；In order to solve this problem, middle pressure steam generator tube head often uses the structure of internal bore welding, this structure
The advantages of be:
(1) banjo fixing butt jointing is used between exchanger tubes and tubesheets, is easily guaranteed that welding quality and weld seam bears the drawing of heat exchanger tube
Power or pressure, stress are preferable.
(2) tube sheet is connect by boss with heat exchanger tube, and attachment weld can carry out ray detection, can after discovery internal flaw
With repairing.
(3) there is no gap between tube sheet and heat exchanger tube, eliminate the risk of crevice corrosion.
The shortcomings that this structure, is: although this structure from stress and it is corrosion-resistant from the aspect of all preferably, due to bonding machine
The limitation of tool is currently only used in the middle pressure heat exchanger of tube sheet relatively thin (~ 30mm)；And the tube sheet general thickness of high pressure heat exchanger is super
200mm is crossed, cannot achieve the deep hole welding form of high pressure heat exchanger at present.
Summary of the invention
The purpose of this utility model is to propose that a kind of Deep Hole Welding argon arc welding connects pipette tips, is a kind of for high pressure heat exchanger
Deep Hole Welding argon arc welding connect pipette tips.
To achieve the goals above, the technical scheme is that
A kind of Deep Hole Welding argon arc welding connects pipette tips, and the barral of a gun diameter of welding gun head is no more than 11mm, and barral of a gun includes by copper
The contact tube that bar is process and the heatproof sleeve being arranged on the outside of contact tube, wherein the conduction pipe orifice is vertical along being axially arranged with
To partition, inner hole is divided into the upper half circular hole and lower half circular hole of disengaging cooling water by longitudinal baffle, along axis among longitudinal baffle
To protective gas through-hole pipe is provided with, conductive pipe orifice front end side passes through radial partition and longitudinal baffle, protective gas through-hole is truncated
Pipe is provided with cooling water return flow line, upper half circular arc around protective gas through-hole pipe across radial partition, in radial membrane backside
Hole and lower half circular hole are connected to by the through-hole being arranged in radial partition with cooling water return flow line respectively, conductive pipe orifice front end
It is close to cooling water return flow line and is provided with tungsten electrode locating piece, is axially provided with tungsten electrode perpendicular to contact tube in tungsten electrode locating piece and fixes
Hole, tungsten electrode are inserted into fixation hole and fix, and tungsten electrode is provided with protective gas outflow chamber, protective gas in tungsten electrode locating piece
It flows out chamber and connect perforation with protective gas through-hole pipe.
Scheme is further: the barral of a gun being provided with positioning support ring, the outer diameter of positioning support ring is inserted equal to barral of a gun
Enter the aperture in welded part hole.
Scheme is further: the positioning support ring at least there are two, the setting of two positioning support central spacers.
Scheme is further: air sifter is filled in protective gas outflow chamber, air sifter is for filtering outflow chamber
Protection gas.
Compared with the prior art, the utility model is process by using red copper bar, is protected by walking Ar in intermediate hole
Gas is protected, two sides semi-circular portions walk cooling water, add tungsten electrode and air sifter at the top of pipette tips, by the fixed tungsten electrode of jackscrew.Due to using red copper bar
Overall processing can be such that barral of a gun diameter is substantially reduced to 11mm.Furthermore, it is contemplated that high pressure heat exchanger tube sheet is thicker, in order to guarantee
One to two positioning supports, positioning support is axially arranged in welding gun bar according to tube sheet and boss actual (real) thickness in the stability of barral of a gun
So that barral of a gun is ensure that stability in welding process in tube sheet and heat exchange pore, improves welding quality.
The utility model is described in detail with reference to the accompanying drawings and examples.
Detailed description of the invention
FIG. 1 is a schematic structural view of the utility model；
Fig. 2 is the utility model barral of a gun schematic cross-section, the A-A view of Fig. 1.
Specific embodiment
A kind of Deep Hole Welding argon arc welding connects pipette tips, and as depicted in figs. 1 and 2, the barral of a gun 1 of welding gun head is fixed on welding machine 2
On, the barral of a gun diameters of pipette tips is no more than 11mm, and barral of a gun includes the contact tube 101 being process by solid red copper bar and in contact tube
The ceramic material heatproof sleeve 102 of outside setting, wherein as shown in Fig. 2, conduction pipe orifice edge is axially arranged with longitudinal baffle 103,
Inner hole is divided into the upper half circular hole 104 and lower half circular hole 105 of disengaging cooling water by longitudinal baffle, along axial direction among longitudinal baffle
It is provided with the through-hole pipe 106 of logical protective gas Ar, conductive pipe orifice front end side passes through radial partition 107 and longitudinal baffle 103 is truncated,
Protective gas through-hole pipe 106 passes through radial partition 107, and protective gas through-hole pipe is provided with cooling water in radial membrane backside
Return flow line 108, upper half circular hole and lower half circular hole respectively by the through-hole 107-1 and 107-2 that is arranged in radial partition with
The connection of cooling water return flow line, conductive pipe orifice front end are close to cooling water return flow line and are provided with tungsten electrode locating piece 3, tungsten electrode positioning
Tungsten electrode fixation hole is axially provided in block 3 perpendicular to contact tube, tungsten electrode 4 is inserted into fixation hole and fixes by jackscrew 5, fixed in tungsten electrode
Tungsten electrode is provided with protective gas outflow chamber in the block of position, protective gas outflow chamber is connect with protective gas through-hole pipe to be passed through
Logical, the front end of tungsten electrode 4 will flow out chamber from protective gas and stretch out 3 to 5mm, be filled with gas in protective gas outflow chamber
Sieve 6, air sifter net are used to filter the protection gas of outflow chamber.The longitudinal baffle 103 is by adding in solid copper rod
Upper half circular hole 104 and lower half circular hole 105 formation that work goes out, the through-hole pipe 106 for leading to protective gas Ar is also in longitudinal baffle
What the circular arc protrusion and then drilling processing that processing is formed among 103 were formed.
In view of high pressure heat exchanger tube sheet is thicker, in order to guarantee the stability of barral of a gun, the barral of a gun is provided with positioning
Support ring 7, the outer diameter of positioning support ring are equal to the aperture in barral of a gun insertion welded part hole.Positioning support ring can be one,
But for stabilization: the positioning support ring at least there are two, the setting of two positioning support central spacers.
By above-mentioned welding gun head structure, so that welding gun gun body is protruded into internal diameter and only have the high pressure heat exchanger tube sheet of 17mm complete
At welding, realizes on high pressure heat exchanger using tube head deep hole welding structure, solve between tube sheet shell side side heat exchanger tube and pore
Crevice corrosion problem, while weld seam stress can be improved, it is convenient for non-destructive testing；Make high pressure heat exchanger and can be suitably used for tube side medium
Corrode heavier occasion with shell side medium.
Claims (4)
1. a kind of Deep Hole Welding argon arc welding connects pipette tips, the barral of a gun diameter of welding gun head is no more than 11mm, and barral of a gun includes by copper bar
The contact tube being process and the heatproof sleeve being arranged on the outside of contact tube, which is characterized in that the conduction pipe orifice is set along axial direction
There is a longitudinal baffle, inner hole is divided into the upper half circular hole and lower half circular hole of disengaging cooling water by longitudinal baffle, among longitudinal baffle
Axially disposed to have protective gas through-hole pipe, conductive pipe orifice front end side passes through radial partition and longitudinal baffle, protective gas is truncated
Through-hole pipe passes through radial partition, and protective gas through-hole pipe is provided with cooling water return flow line, upper half in radial membrane backside
Circular hole and lower half circular hole are connected to by the through-hole being arranged in radial partition with cooling water return flow line respectively, conductive pipe orifice
Front end is close to cooling water return flow line and is provided with tungsten electrode locating piece, is axially provided with tungsten electrode perpendicular to contact tube in tungsten electrode locating piece
Fixation hole, tungsten electrode are inserted into fixation hole and fix, and tungsten electrode is provided with protective gas outflow chamber, protection in tungsten electrode locating piece
Gas flows out chamber and connect perforation with protective gas through-hole pipe.
2. Deep Hole Welding argon arc welding according to claim 1 connects pipette tips, which is characterized in that be provided with around the barral of a gun
Positioning support ring, the outer diameter of positioning support ring are equal to the aperture in barral of a gun insertion welded part hole.
3. Deep Hole Welding argon arc welding according to claim 2 connects pipette tips, which is characterized in that the positioning support ring is at least
There are two, two positioning support central spacer settings.
4. Deep Hole Welding argon arc welding according to claim 1 connects pipette tips, which is characterized in that flowed out in the protective gas
Air sifter is filled in chamber, air sifter is used to filter the protection gas of outflow chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920272187.9U CN209578443U (en) | 2019-03-05 | 2019-03-05 | A kind of Deep Hole Welding argon arc welding connects pipette tips |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920272187.9U CN209578443U (en) | 2019-03-05 | 2019-03-05 | A kind of Deep Hole Welding argon arc welding connects pipette tips |
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| Publication Number | Publication Date |
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| CN209578443U true CN209578443U (en) | 2019-11-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920272187.9U Active CN209578443U (en) | 2019-03-05 | 2019-03-05 | A kind of Deep Hole Welding argon arc welding connects pipette tips |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113102870A (en) * | 2021-04-25 | 2021-07-13 | 山西丰喜化工设备有限公司 | Inner hole rotating argon arc welding gun head for pipe and pipe plate and welding method |
| CN113399794A (en) * | 2021-06-28 | 2021-09-17 | 上海电气电站设备有限公司 | Special gas protection device for small-diameter pipe and tube plate inner hole welding |
-
2019
- 2019-03-05 CN CN201920272187.9U patent/CN209578443U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113102870A (en) * | 2021-04-25 | 2021-07-13 | 山西丰喜化工设备有限公司 | Inner hole rotating argon arc welding gun head for pipe and pipe plate and welding method |
| CN113399794A (en) * | 2021-06-28 | 2021-09-17 | 上海电气电站设备有限公司 | Special gas protection device for small-diameter pipe and tube plate inner hole welding |
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