CN109648177B - Pipeline connection method suitable for oil injection device - Google Patents
Pipeline connection method suitable for oil injection device Download PDFInfo
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- CN109648177B CN109648177B CN201811569668.2A CN201811569668A CN109648177B CN 109648177 B CN109648177 B CN 109648177B CN 201811569668 A CN201811569668 A CN 201811569668A CN 109648177 B CN109648177 B CN 109648177B
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- oil pipe
- pipe
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- welding
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/16—Arc welding or cutting making use of shielding gas
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/0026—Arc welding or cutting specially adapted for particular articles or work
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Branch Pipes, Bends, And The Like (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
The invention provides a pipeline connecting method suitable for an oil spraying device, which can improve the strength of a pipeline welding part, improve the service temperature of the oil spraying device and reduce the welding deformation of parts. The oil injection device comprises a circumferential oil pipe, an arc pipe, a radial oil pipe A and a radial oil pipe B, wherein the radial oil pipe A is communicated with the circumferential oil pipe, and the radial oil pipe B is communicated with the arc pipe after penetrating through the circumferential oil pipe. The method specifically comprises the following steps: set up the boss respectively in radial oil pipe B's both sides, weld on the annular oil pipe through argon arc welding radial oil pipe B earlier, then with two boss butt joints surround radial oil pipe B, adopt argon arc welding again to weld two bosses together. By adopting the method, the direct welding of the thin-wall part and the reinforcing structure with larger thickness is avoided, the welding deformation is reduced, and the reinforcing block can play a role in reinforcing the strength of the welding part of the annular oil pipe and the radial oil pipe.
Description
Technical Field
The invention relates to a pipeline connecting method, in particular to a pipeline connecting method of an oil injection device.
Background
The fuel injection device is used for providing fuel for an engine, the structure of the fuel injection device is mostly connected by adopting a pipeline, fuel injection holes are arranged on the pipeline, and the fuel is injected from the injection holes and then is mixed with air for combustion. When the fuel injection device is used, the fuel injection device needs to bear the heat load of high-temperature incoming flow air and also needs to bear the force load of the pressure of fuel in the pipe. Therefore, the structural strength and sealing requirements for the fuel injection device are high.
The pipeline connection of the existing oil injection device mostly adopts a three-way structure, the oil injection pipes are respectively connected with the three-way joint from three directions, and the distance between the front-stage oil injection pipe and the rear-stage oil injection pipe is small, so that argon arc welding cannot be adopted, the oil injection pipes and the three-way joint mostly adopt brazing welding, and the welding position has enough strength while the sealing requirement is ensured.
The three-way joint is adopted to connect the oil injection device, and the oil injection device has the following defects:
(1) the brazing process is complex, the use temperature is low (the solder is molten at more than 1050 ℃), the total temperature of incoming flow is continuously increased along with the continuous increase of cruise Mach number, if the total temperature of a certain model in a cruise state reaches 900K-1000K, the temperature of fuel gas at the position of an oil injection pipe can reach 1500K and is higher than the melting temperature of brazing solder, and the use of the brazing welding method is limited under the high temperature condition.
(2) By adopting the structure of the three-way joint, the strength of the welding part of the oil spraying pipe and the three-way joint is poor, and the root of the oil spraying pipe can not be strengthened under the stress condition, so that the oil spraying pipe is easy to deform and crack.
(3) Because of the adoption of the three-way joint structure, the annular oil pipe connected with the three-way joint structure needs to be designed in a segmented manner, and the processing difficulty is increased.
Disclosure of Invention
In view of the above, the invention provides a pipeline connecting method suitable for an oil injection device, which can improve the strength of a pipeline welding part, improve the service temperature of the oil injection device and reduce the welding deformation of parts.
The oil injection device comprises an annular oil pipe, an arc pipe, a radial oil pipe A and a radial oil pipe B; the radial oil pipe A is communicated with the annular oil pipe; and the radial oil pipe B penetrates through the annular oil pipe and then is communicated with an arc pipe concentrically arranged with the annular oil pipe.
The method comprises the following steps: before the radial oil pipe A and the radial oil pipe B are installed, a reinforcing block is sleeved on the annular oil pipe according to the number of the radial oil pipes B; a through hole A for penetrating through a circumferential oil pipe is processed on the side surface of the reinforcing block, a through hole B with a semicircular cross section is processed on the top of the reinforcing block along one side end surface, and the through hole B is vertically communicated with the through hole A; each two reinforcing blocks form a reinforcing block pair, and when the two reinforcing blocks in the reinforcing block pair are butted, the semicircular through holes B on the reinforcing block pair are combined into a complete circular through hole; ensuring that each radial oil pipe B corresponds to one reinforcing block pair;
step two: penetrating the radial oil pipe B through the annular oil pipe, and connecting the annular oil pipe and the radial oil pipe B in an argon arc welding manner;
step three: after all the radial oil pipes B are welded, two reinforcing blocks in the reinforcing block pairs are respectively moved to two sides of the radial oil pipes B, and semicircular through holes B on the two reinforcing blocks are combined into a complete circular through hole to surround the radial oil pipes B; welding two reinforcing blocks in the same reinforcing block pair together in an argon arc welding mode;
step four: and fixedly connecting the radial oil pipe A to the annular oil pipe.
The annular oil pipe is of an annular structure which is formed in one step and provided with a notch, and the notch is used for sleeving the reinforcing block.
In the third step, after all the radial oil pipes B are welded, checking the sealing performance of all the welding parts; and after the sealing performance of the welding rod meets the set requirement, welding the reinforcing block pair.
Has the advantages that:
(1) by adopting the method, the direct welding of a thin-wall part (such as a pipe) and a reinforcing structure with larger thickness is avoided, the welding deformation of the thin-wall part can be effectively reduced, and the reinforcing block can play a role in reinforcing the strength of the welding part of the annular oil pipe and the radial oil pipe.
(2) The argon arc welding is adopted to replace the brazing welding mode, so that the upper limit of the service temperature of the fuel injection device of the bullet engine is improved, and the welding complexity is reduced.
(3) Compared with the structure adopting the common three-way joint, the method can make the annular oil pipe into a full-circle structure, thereby reducing the processing difficulty.
Drawings
FIG. 1 is a schematic structural view of a circumferential oil pipe and a radial oil pipe before welding;
FIG. 2 is a schematic structural view of a circumferential oil pipe and a radial oil pipe after welding;
fig. 3 is a schematic structural view of the reinforcing block.
Wherein: 1-annular oil pipe, 2-radial oil pipe A, 3-radial oil pipe B, 4-reinforcing block and 5-arc pipe
Detailed Description
The invention is described in detail below by way of example with reference to the accompanying drawings.
The embodiment provides a pipeline connecting method of an oil injection device, which changes the connecting form of the traditional three-way structure and can effectively improve the strength of a pipeline welding part.
The oil injection device comprises a circumferential oil pipe 1, an arc pipe 5, a radial oil pipe A2 and a radial oil pipe B3, wherein the arc pipe 5 and the circumferential oil pipe 1 are concentrically arranged, and the radial oil pipe A2 is communicated with the circumferential oil pipe 1, so that the radial oil pipe A2 can be directly welded on the circumferential oil pipe 1 in an argon arc welding manner; the radial oil pipe B3 needs to penetrate through the annular oil pipe 1 and then penetrate through the arc pipe 5, as shown in fig. 1. The present embodiment is an improvement on the connection mode between the radial oil pipe B3 and the annular oil pipe 1.
The circumferential oil pipe 1 in the embodiment is of a full-circle structure, and is provided with a notch at one position and used for sleeving the reinforcing blocks 4, wherein the reinforcing blocks 4 are used in pairs. The structure of the reinforcing block 4 is as shown in fig. 3, a through hole a for passing through the annular oil pipe 1 is processed on the side surface of the reinforcing block 4, a through hole B with a semicircular cross section is processed on the top of the reinforcing block along one side end surface, and the through hole B is vertically communicated with the through hole a. When two reinforcing blocks in the reinforcing block pair are butted, the semicircular through holes B on the reinforcing blocks are combined into a complete circular through hole.
Before welding, according to the number of the radial oil pipes B3, the reinforcing block pairs are sleeved on the annular oil pipe 1 from the notches on the annular oil pipe 1, and each radial oil pipe B3 is guaranteed to correspond to one reinforcing block pair. Then, a through hole for penetrating through the radial oil pipe B3 is processed on the annular oil pipe 1, and after the radial oil pipe B3 penetrates through the through hole, the annular oil pipe 1 and the radial oil pipe B3 are connected in an argon arc welding mode. After the welding of all the radial oil pipes B3 was completed, the formed pipes were subjected to a press test to check the sealability of the welded portions. After the test is qualified, two reinforcing blocks in the reinforcing block pair are respectively moved to two sides of a radial oil pipe B3, and semicircular through holes B on the two reinforcing blocks are combined into a complete circular through hole to surround a radial oil pipe B3; and welding the two reinforcing blocks in the same reinforcing block pair together in an argon arc welding manner, so as to realize the reinforcement of the structure at the position, as shown in fig. 2.
In summary, the above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (3)
1. A pipeline connection method suitable for an oil injection device comprises a circumferential oil pipe, an arc pipe, a radial oil pipe A and a radial oil pipe B; the radial oil pipe A is communicated with the annular oil pipe; the radial oil pipe B penetrates through the annular oil pipe and then is communicated with an arc pipe which is concentrically arranged with the annular oil pipe;
the method is characterized in that:
the method comprises the following steps: before the radial oil pipe A and the radial oil pipe B are installed, a reinforcing block is sleeved on the annular oil pipe according to the number of the radial oil pipes B; a through hole A for penetrating through a circumferential oil pipe is processed on the side surface of the reinforcing block, a through hole B with a semicircular cross section is processed on the top of the reinforcing block along one side end surface, and the through hole B is vertically communicated with the through hole A; each two reinforcing blocks form a reinforcing block pair, and when the two reinforcing blocks in the reinforcing block pair are butted, the semicircular through holes B on the reinforcing block pair are combined into a complete circular through hole; ensuring that each radial oil pipe B corresponds to one reinforcing block pair;
step two: penetrating the radial oil pipe B through the annular oil pipe, and connecting the annular oil pipe and the radial oil pipe B in an argon arc welding manner;
step three: after all the radial oil pipes B are welded, two reinforcing blocks in the reinforcing block pairs are respectively moved to two sides of the radial oil pipes B, and semicircular through holes B on the two reinforcing blocks are combined into a complete circular through hole to surround the radial oil pipes B; welding two reinforcing blocks in the same reinforcing block pair together in an argon arc welding mode;
step four: and fixedly connecting the radial oil pipe A to the annular oil pipe.
2. The pipe connection method for a fuel injection device according to claim 1, wherein the annular fuel pipe is a one-step formed annular structure having a notch, and the reinforcing block is sleeved on the annular fuel pipe through the notch.
3. The pipe connection method suitable for the oil spraying device according to claim 1, wherein in step three, after welding of all the radial oil pipes B is completed, the tightness of all the welded parts is checked; and after the sealing performance of the welding rod meets the set requirement, welding the reinforcing block pair.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811569668.2A CN109648177B (en) | 2018-12-21 | 2018-12-21 | Pipeline connection method suitable for oil injection device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811569668.2A CN109648177B (en) | 2018-12-21 | 2018-12-21 | Pipeline connection method suitable for oil injection device |
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| CN109648177A CN109648177A (en) | 2019-04-19 |
| CN109648177B true CN109648177B (en) | 2021-01-08 |
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| US7926286B2 (en) * | 2006-09-26 | 2011-04-19 | Pratt & Whitney Canada Corp. | Heat shield for a fuel manifold |
| US8572976B2 (en) * | 2006-10-04 | 2013-11-05 | Pratt & Whitney Canada Corp. | Reduced stress internal manifold heat shield attachment |
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|---|---|---|---|---|
| CN201461924U (en) * | 2009-06-16 | 2010-05-12 | 上海宝田新型建材有限公司 | Lubricating and temperature reducing device for speed reducer |
| CN204003153U (en) * | 2014-08-08 | 2014-12-10 | 罗雪琴 | Disc type air breathing engine |
| CN104454149A (en) * | 2014-11-28 | 2015-03-25 | 重庆小康工业集团股份有限公司 | Oil return pipe of supercharger |
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| CN109648177A (en) | 2019-04-19 |
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