CN101434000A - Small-interior diameter deep hole plasma spray welding gun - Google Patents
Small-interior diameter deep hole plasma spray welding gun Download PDFInfo
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- CN101434000A CN101434000A CNA2008101478566A CN200810147856A CN101434000A CN 101434000 A CN101434000 A CN 101434000A CN A2008101478566 A CNA2008101478566 A CN A2008101478566A CN 200810147856 A CN200810147856 A CN 200810147856A CN 101434000 A CN101434000 A CN 101434000A
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Abstract
The invention discloses a plasma spray welding gun for a deep hole with small inside diameter, which comprises a negative electrode and a positive electrode in a shell. The shell is provided with a nozzle, the shell is in a shape of a blind tube, the inner wall of the shell is provided with an insulating coating, the tube wall is provided with a nozzle mounting hole, the nozzle is arranged in the mounting hole in the radial direction, and a body part of the nozzle is arranged in the space of the tube; the nozzle is a composite nozzle, and is provided with an ion gas jet passage, a powder feeding gas jet passage, and a protective gas jet passage; the geometrical shape of the positive electrode accords with the inner space of the blind tube, the positive electrode is filled in the blind tube, a longitudinal eccentric macro pore for arranging the negative electrode and two longitudinal pores of the ion gas passage and the powder feeding gas passage are arranged in the positive electrode, and the two pores are communicated with the ion gas jet passage and the powder feeding gas jet passage of the nozzle respectively; and the negative electrode consists of a cathode bar, a cathode base and a cathode head, wherein the cathode bar is inserted in the eccentric macro pore of the positive electrode; and the cathode base is connected with the cathode bar, the root end of the cathode head is fixed in the cathode base and connected with the cathode bar, and the head end of the cathode head extends into a central hole of the nozzle. The spray welding gun has the advantages of compact structure and small size, and can weld in the deep hole with more than phi 36 millimeters; and the diameter of a gun head can be made into 26 millimeters.
Description
Technical field
The present invention relates to plasma spray welding gun, particularly a kind of plasma spray welding gun that welds in the small-interior diameter deep hole that is used in.
Background technology
Commercial plant often has the deep hole of some minor diameters need carry out surface treatment, and for example, valve hole part has the sleeve of a series of apertures at φ 48～70mm in the gas turbine, requires at hole inwall surfacing one deck stellite, needs to adopt the plasma spray welding technology welding.But the yin, yang electrode in the existing plasma spray welding gun, its rifle head is an apart arrangement, the bulk that occupies is bigger, and is so the diameter of rifle head is also bigger, minimum more than φ 80mm, can only weld in the hole of extend inside diameter greater than φ 100mm, can't process above-mentioned small-diameter deep hole workpiece.
Summary of the invention
Purpose of the present invention provides the very little plasma spray welding gun of a kind of rifle head diameter, can put in the small-interior diameter deep hole and weld.
The object of the present invention is achieved like this:
A kind of small-interior diameter deep hole plasma spray welding gun comprises shell and layout negative electrode, positive electrode in the enclosure, and shell is provided with nozzle, described shell is the blind pipe shape, the nozzle installing hole is arranged on the tube wall, and described nozzle radial arrangement is in this installing hole, and the main part of nozzle is positioned at the pipe space; This nozzle is a combining nozzle, has ion gas, powder feeding gas, protection gas jet road; The geometry of described positive electrode is consistent with this blind pipe inner space, be filled in the blind pipe, has a vertical eccentric macropore that is used to arrange negative electrode in the positive electrode, two vertical apertures that are used as ion gas, powder feeding gas passage, two apertures are communicated with ion gas, the powder feeding gas injection road of nozzle respectively; Described negative electrode is constituted by cathode bar, cathode block, cathode taps, and cathode bar is embedded in the vertical eccentric macropore of positive electrode, and its mating surface has insulating barrier; Cathode block connects cathode bar, and the butt of cathode taps is fixed in the cathode block, and is connected with cathode bar, and the head end of cathode taps puts in the centre bore of nozzle.
The ion gas of described nozzle, powder feeding gas, protection gas jet road are annulars.
The injection road of described nozzle sprays the road, protects the gas jet road to be disposed in order by ion gas jet road, powder feeding gas along injection direction.
Described powder feeding gas passage is lined with copper pipe.
The mating surface of described shell and positive electrode leaves local gap, is used as protection gas passage, the protection gas jet road of this channel connection nozzle.
The outer wall of described shell has insulating coating.
The head of described positive electrode has cooling water cavity, two vertical apertures is arranged respectively as intake tunnel and exhalant canal in the positive electrode, is communicated with this cooling water cavity.
Useful technique effect of the present invention:
Because mosaic texture is adopted in the combination of each part of this spray welding gun, very compact, almost there is not the space, to compare with the spray welding gun of existing same specification, appearance and size is dwindled significantly, and rifle head diameter can be accomplished 26mm, can weld in the deep hole more than the Φ 36mm.The overlay cladding surfacing, protection is good, and particularly stream time can reach more than 1.5 hours, and general part endoporus can once be finished surfacing, and the layer non junction guarantees welding quality.
Description of drawings
Fig. 1 is the structure chart of spray welding gun of the present invention
Fig. 2 is the A-A view of Fig. 1
The specific embodiment
Referring to Fig. 1, Fig. 2: this plasma spray welding gun, mainly form by shell 6, positive electrode 7, negative electrode, nozzle 1.Shell 6 is the blind pipe shape, and the nozzle installing hole is arranged on the tube wall, and the inwall of shell 6 has insulating coating.Nozzle 1 radial arrangement is in this installing hole, and the main part of nozzle 1 is positioned at the pipe space.This nozzle 1 is a combining nozzle, has ion gas, powder feeding gas, protection gas jet road.The geometry of positive electrode 7 is consistent with this blind pipe inner space, is filled in the blind pipe.Have a vertical eccentric macropore that is used to arrange negative electrode in the positive electrode 7, two vertical apertures that are used as ion gas passage a, powder feeding gas passage b, two apertures are communicated with ion gas, the powder feeding gas injection road of nozzle 1 respectively.Negative electrode is constituted by cathode bar 5, cathode block 4, cathode taps 2, and cathode bar 5 is embedded in the vertical eccentric macropore of positive electrode 7, and its mating surface has insulation sleeve 3.Cathode block 4 connects cathode bar 5, and the butt of cathode taps 2 is fixed in the cathode block 4, and is connected to integral body with cathode bar 5, and the head end of cathode taps 2 puts in the centre bore of nozzle.
The above-mentioned compound mode of inlaying, the structure that makes welding gun are very compact, almost do not have the space between each part, thereby the appearance and size of having dwindled welding gun significantly, and at present, the welding gun diameter of minimum gauge is 26mm, can put in the deep hole of Φ 36mm to weld.
The ion gas of nozzle, powder feeding gas, protection gas jet road all are the annular spray roads, spray the road, protect the gas jet road to be disposed in order by ion gas jet road, powder feeding gas along injection direction.The advantage in this annular spray road is:
When ion gas entered arc region ionization, around cathode taps 2, its movement locus was to point to the center of circle from circumference, is the radiation convergent manner, is heated evenly, and ionization is abundant, and temperature height, and temperature stabilization are that the very high heat plasma of a kind of degree of wadding a quilt with cotton becomes gas after the ionization.
The powder feeding gas movement locus also is to point to the center of circle from circumference, is the radiation convergent manner, forms an annular stream, and heat plasma becomes gas to run through this annular stream, mixed heat transfer with it, the two rapidly, fully soaking, solder fusing is thorough, temperature evenly, stablize.Be gas, liquid two-phase after the mixing, its wadding degree is also very high, and the layer that the ejection back forms is smooth, bright and clean, superior in quality.
Powder feeding gas is gas, solid two-phase mixed flow, and solid phase is a welding powder, and gas phase is an argon gas, and argon gas is sent welding powder into nozzle as carrier gas stream.Be lined with copper pipe at the powder feeding gas passage.
Shell 6 leaves local gap with the mating surface of positive electrode 7, is used as protection gas passage c, and this passage c is communicated with the protection gas jet road of nozzle 1.Protection gas jet road is the annular gap between nozzle outer wall and its installing hole, and the scolder mixed flow that the annular flow of ejection will go out from the nozzle center hole is surrounded, and plays the effect of protection.
The structure of welding gun is so compact, and it is outstanding especially that heat dissipation problem just seems, therefore, head at positive electrode 7 is provided with cooling water cavity 8, two vertical apertures are arranged respectively as intake tunnel d and exhalant canal e in the positive electrode 7, be communicated with, feed cooling water circulation cooling with this cooling water cavity 8.
Claims (8)
1. small-interior diameter deep hole plasma spray welding gun, comprise shell and layout negative electrode, positive electrode in the enclosure, shell is provided with nozzle, it is characterized in that: described shell is the blind pipe shape, the nozzle installing hole is arranged on the tube wall, described nozzle radial arrangement is in this installing hole, and the main part of nozzle is positioned at the pipe space; This nozzle is a combining nozzle, has ion gas, powder feeding gas, protection gas jet road; The geometry of described positive electrode is consistent with this blind pipe inner space, be filled in the blind pipe, has a vertical eccentric macropore that is used to arrange negative electrode in the positive electrode, two vertical apertures that are used as ion gas, powder feeding gas passage, two apertures are communicated with ion gas, the powder feeding gas injection road of nozzle respectively; Described negative electrode is constituted by cathode bar, cathode block, cathode taps, and cathode bar is embedded in the vertical eccentric macropore of positive electrode, and its mating surface has insulating barrier; Cathode block connects cathode bar, and the butt of cathode taps is fixed in the cathode block, and is connected with cathode bar, and the head end of cathode taps puts in the centre bore of nozzle.
2. small-interior diameter deep hole plasma spray welding gun according to claim 1 is characterized in that: the ion gas of described nozzle, powder feeding gas, protection gas jet road are annulars.
3. small-interior diameter deep hole plasma spray welding gun according to claim 1 is characterized in that: the injection road of described nozzle sprays the road, protects the gas jet road to be disposed in order by ion gas jet road, powder feeding gas along injection direction.
4. plasma spray welding gun according to claim 1 is characterized in that: described powder feeding gas passage is lined with copper pipe.
5. small-interior diameter deep hole plasma spray welding gun according to claim 1 is characterized in that: the mating surface of described shell and positive electrode leaves local gap, is used as protection gas passage, the protection gas jet road of this channel connection nozzle.
6. small-interior diameter deep hole plasma spray welding gun according to claim 1 is characterized in that: the inwall of described shell has insulating coating.
7. small-interior diameter deep hole plasma spray welding gun according to claim 1 is characterized in that: the head of described positive electrode has cooling water cavity, two vertical apertures is arranged respectively as intake tunnel and exhalant canal in the positive electrode, is communicated with this cooling water cavity.
8. small-interior diameter deep hole plasma spray welding gun according to claim 1 is characterized in that: the diameter of described shell is less than 30mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101478566A CN101434000B (en) | 2008-12-13 | 2008-12-13 | Small-interior diameter deep hole plasma spray welding gun |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101478566A CN101434000B (en) | 2008-12-13 | 2008-12-13 | Small-interior diameter deep hole plasma spray welding gun |
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| Publication Number | Publication Date |
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| CN101434000A true CN101434000A (en) | 2009-05-20 |
| CN101434000B CN101434000B (en) | 2011-03-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2008101478566A Active CN101434000B (en) | 2008-12-13 | 2008-12-13 | Small-interior diameter deep hole plasma spray welding gun |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101733522B (en) * | 2009-12-07 | 2012-04-25 | 昆山华恒工程技术中心有限公司 | Small-bore TIG (tungsten inert gas) surfacing torch |
| CN102744507A (en) * | 2012-08-13 | 2012-10-24 | 常州机电职业技术学院 | Plasma cutting torch nozzle |
| CN104308349A (en) * | 2014-11-18 | 2015-01-28 | 广东工业大学 | Powder plasma cladding welding torch for small inner hole |
| CN105171215A (en) * | 2015-10-16 | 2015-12-23 | 吴忠仪表有限责任公司 | Split type plasma spray nozzle |
| CN106363285A (en) * | 2016-12-06 | 2017-02-01 | 上海永言特种材料研究所 | Improved welding gun |
| CN106944728A (en) * | 2017-05-23 | 2017-07-14 | 东方电气集团东方汽轮机有限公司 | A kind of small Hole plasma welding rifle of the miniature depth of full water cooling type |
| CN111344140A (en) * | 2017-11-14 | 2020-06-26 | 罗兰·巴克霍夫 | Device for thermally welding plastic parts and assembly comprising such a device |
| CN112045290A (en) * | 2020-08-28 | 2020-12-08 | 上海一核阀门股份有限公司 | Overlaying head and overlaying device for overlaying small-caliber valve |
| CN112517916A (en) * | 2020-11-23 | 2021-03-19 | 张爽 | Device and method for preparing spherical powder by using tubular electrode and spray welding |
| CN115505864A (en) * | 2022-08-08 | 2022-12-23 | 中国人民解放军陆军装甲兵学院 | Small-size axial powder feeding inner hole plasma spraying gun |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102489847B (en) * | 2011-11-24 | 2013-03-20 | 重庆理工大学 | Automatic paraxial powder-feeding welding gun for alloy powder filling argon tungsten-arc welding |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86207668U (en) * | 1986-10-14 | 1987-10-07 | 机械工业部武汉材料保护研究所 | Plasma spray welding unit for deep hole |
| AT4667U1 (en) * | 2000-06-21 | 2001-10-25 | Inocon Technologie Gmbh | PLASMA TORCH |
| CN2719473Y (en) * | 2004-05-18 | 2005-08-24 | 杨迎元 | Plasma welding gun |
| CN2704443Y (en) * | 2004-07-07 | 2005-06-15 | 张旭 | Plasma welding gun with small current |
-
2008
- 2008-12-13 CN CN2008101478566A patent/CN101434000B/en active Active
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101733522B (en) * | 2009-12-07 | 2012-04-25 | 昆山华恒工程技术中心有限公司 | Small-bore TIG (tungsten inert gas) surfacing torch |
| CN102744507A (en) * | 2012-08-13 | 2012-10-24 | 常州机电职业技术学院 | Plasma cutting torch nozzle |
| CN104308349A (en) * | 2014-11-18 | 2015-01-28 | 广东工业大学 | Powder plasma cladding welding torch for small inner hole |
| CN105171215A (en) * | 2015-10-16 | 2015-12-23 | 吴忠仪表有限责任公司 | Split type plasma spray nozzle |
| CN105171215B (en) * | 2015-10-16 | 2017-07-04 | 吴忠仪表有限责任公司 | Split type plasma nozzle |
| CN106363285B (en) * | 2016-12-06 | 2019-10-11 | 上海永言特种材料研究所 | A kind of improved welding gun |
| CN106363285A (en) * | 2016-12-06 | 2017-02-01 | 上海永言特种材料研究所 | Improved welding gun |
| CN106944728A (en) * | 2017-05-23 | 2017-07-14 | 东方电气集团东方汽轮机有限公司 | A kind of small Hole plasma welding rifle of the miniature depth of full water cooling type |
| CN106944728B (en) * | 2017-05-23 | 2019-07-02 | 东方电气集团东方汽轮机有限公司 | A kind of small Hole plasma welding rifle of the miniature depth of full water cooling type |
| CN111344140A (en) * | 2017-11-14 | 2020-06-26 | 罗兰·巴克霍夫 | Device for thermally welding plastic parts and assembly comprising such a device |
| CN111344140B (en) * | 2017-11-14 | 2022-04-19 | 罗兰·巴克霍夫 | Device for thermally welding plastic parts and assembly comprising such a device |
| CN112045290A (en) * | 2020-08-28 | 2020-12-08 | 上海一核阀门股份有限公司 | Overlaying head and overlaying device for overlaying small-caliber valve |
| CN112517916A (en) * | 2020-11-23 | 2021-03-19 | 张爽 | Device and method for preparing spherical powder by using tubular electrode and spray welding |
| CN115505864A (en) * | 2022-08-08 | 2022-12-23 | 中国人民解放军陆军装甲兵学院 | Small-size axial powder feeding inner hole plasma spraying gun |
| CN115505864B (en) * | 2022-08-08 | 2023-12-29 | 中国人民解放军陆军装甲兵学院 | Small-size axial powder feeding inner hole plasma spraying gun |
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| CN101434000B (en) | 2011-03-23 |
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