CN212615119U - High-pressure oil pipe of track internal combustion locomotive - Google Patents
High-pressure oil pipe of track internal combustion locomotive Download PDFInfo
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- CN212615119U CN212615119U CN202021055461.6U CN202021055461U CN212615119U CN 212615119 U CN212615119 U CN 212615119U CN 202021055461 U CN202021055461 U CN 202021055461U CN 212615119 U CN212615119 U CN 212615119U
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Abstract
The utility model discloses a track diesel locomotive high pressure fuel pipe relates to diesel locomotive technical field, including oil pipe body and two coupling assembling, the both ends of oil pipe body all are provided with the upset head, two coupling assembling overlap respectively and locate the both ends of oil pipe body, and coupling assembling is located the upset head inboard, coupling assembling includes the union nut, split type bush and O type circle, the tip of oil pipe body is located to the union nut cover, and the threaded connection mouth of union nut is towards the terminal surface of oil pipe body, the split type bush cover is located on the oil pipe body, the split type bush is located to O type circle cover, split type bush sets up between union nut and upset head, the seamless steel pipe of cold drawing that the oil pipe body adopted low-alloy high strength passes through cold-heading integrated into one piece. The utility model provides a rail internal combustion locomotive high pressure oil pipe has good resistance to pressure and fatigue resistance, and anti-seismic performance is good, can effectively reduce high pressure fuel pipe's fatigue fracture and oil leak problem, and the installation is convenient and dismantle easily.
Description
Technical Field
The utility model relates to a diesel locomotive technical field especially relates to a track diesel locomotive high pressure oil pipe.
Background
At present, the road and land transportation industry is flourishing, the supply amount of railway transportation rail diesel locomotives is gradually increased at home and abroad, and particularly in wide areas (such as western regions, africa regions, south america and the like) lacking power grids, the diesel locomotives as national combat readiness resources need to be reserved and reserved for a long time. The rail diesel locomotive mainly uses diesel oil for combustion to provide power, and the diesel oil high-pressure oil pipe of the internal combustion engine is used as a key A-type part for conveying high-pressure fuel oil, and the industrial standard requirement is that the rail diesel locomotive must be forcibly maintained or replaced after being used for 24 months or 45 kilometers. The existing large-diameter diesel engine high-pressure oil pipe mostly adopts a machining mode to process a sealing conical surface, so that the production efficiency is low, the machining of the sealing conical surface is rough, and the leakage phenomenon is more after the machine is installed. Meanwhile, the domestic diesel oil high-pressure oil pipe of the internal combustion engine mainly depends on the import from abroad, so that the price is high, and the timely delivery cannot be guaranteed.
SUMMERY OF THE UTILITY MODEL
For solving above technical problem, the utility model provides a rail diesel locomotive high pressure oil pipe has good resistance to pressure and fatigue resistance, and anti-seismic performance is good, can effectively reduce high pressure fuel pipe's fatigue fracture and oil leak problem, and the installation is convenient and dismantle easily.
In order to achieve the above object, the utility model provides a following scheme:
the utility model provides a track diesel locomotive high pressure oil pipe, including oil pipe body and two coupling assembling, the both ends of oil pipe body all are provided with the upset head, two coupling assembling overlaps respectively and locates the both ends of oil pipe body, just coupling assembling is located the upset head is inboard, coupling assembling includes union nut, split type bush and O type circle, union nut cover is located the tip of oil pipe body, just union nut's threaded connection mouth orientation the terminal surface of oil pipe body, split type bush cover is located on the oil pipe body, O type circle cover is located on the split type bush, split type bush set up in union nut with between the upset head, the oil pipe body adopts the seamless steel pipe of cold drawing of low-alloy high strength to pass through cold-heading integrated into one piece.
Preferably, the pressure resistance value of the oil pipe body is more than or equal to 2100 Bar.
Preferably, the tensile strength of the oil pipe body is greater than or equal to 390MPa, the yield strength of the oil pipe body is greater than or equal to 245MPa, and the elongation of the oil pipe body is greater than or equal to 22%.
Preferably, the deformation amount of the inner hole of the oil pipe body after bending is less than 10% of the hole diameter of the inner hole.
Preferably, the cleanliness of the particle impurities on the inner surface of the oil pipe body is less than or equal to 6.3 mg.
Preferably, split type bush one end is the conical surface, the split type bush other end is provided with annular seal groove, annular seal groove is used for installing O type circle, split type bush's conical surface orientation the threaded connection mouth of union nut.
Preferably, the split type bushing comprises two semi-ring bushings symmetrically arranged along the axial direction, one end of each semi-ring bushing is provided with a semi-ring groove, and the two semi-ring grooves form the annular sealing groove after the two semi-ring bushings are in butt joint.
The utility model discloses for prior art gain following technological effect:
the utility model provides a rail internal combustion locomotive high pressure oil pipe, including oil pipe body and two coupling assembling, the both ends of oil pipe body all are provided with the upset head, and two coupling assembling overlap respectively and locate the both ends of oil pipe body, and coupling assembling is located the upset head inboard, and coupling assembling includes the union nut, split type bush and O type circle, and coupling assembling is for dividing the body structure with the design of oil pipe body for split type bush and union nut dismouting or change rapidly, the interference phenomenon that easy processing bending appears, the advantage that has the installation convenience and dismantles easily. The oil pipe body adopts the cold drawing seamless steel pipe of low alloy high strength to pass through cold-heading integrated into one piece, and cold-heading integrated into one piece makes material internal structure can not appear defects such as compression crack, improves production efficiency, and oil pipe body tensile strength is high, toughness is good, has good resistance to pressure, fatigue resistance and cleanliness, can bear the high-frequency vibration of engine after bending forming, and anti-seismic performance is good, can effectively reduce high pressure fuel pipe's fatigue fracture and oil leak problem.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural view of a high-pressure oil pipe of a rail internal combustion locomotive provided by the invention;
FIG. 2 is a sectional view of the split bushing and union nut of the present invention;
fig. 3 is a flow chart of the manufacturing process of the well oil pipe body of the present invention.
Description of reference numerals: 1. an oil pipe body; 2. heading; 3. a union nut; 4. a split bushing; 5. and an O-shaped ring.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The utility model aims at providing a track diesel locomotive high pressure oil pipe has good resistance to pressure and fatigue resistance, and anti-seismic performance is good, can effectively reduce high pressure fuel pipe's fatigue fracture and oil leak problem, and the installation is convenient and dismantle easily.
In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention is described in detail with reference to the accompanying drawings and the detailed description.
As shown in fig. 1 and 2, the embodiment provides a high pressure oil pipe of a rail diesel locomotive, which comprises an oil pipe body 1 and two connecting assemblies, wherein two ends of the oil pipe body 1 are both provided with upsets 2, the two connecting assemblies are respectively sleeved at two ends of the oil pipe body 1, the connecting assemblies are positioned inside the upsets 2, the connecting assemblies comprise a union nut 3, a split type bushing 4 and an O-ring 5, the union nut 3 is sleeved at the end part of the oil pipe body 1, a threaded connection port of the union nut 3 faces the end surface of the oil pipe body 1, the split type bushing 4 is sleeved on the oil pipe body 1, the O-ring 5 is sleeved on the split type bushing 4, the split type bushing 4 is arranged between the union nut 3 and the upsets 2, the connecting assemblies and the oil pipe body 1 are designed into split structures, so that the split type bushing 4 and the union nut 3 can be rapidly disassembled or replaced, has the advantages of convenient installation and easy disassembly. The oil pipe body 1 is formed integrally by cold heading through a cold-drawn seamless steel pipe with low alloy and high strength, the cold heading integral forming enables the internal structure of the material not to have the defects of compression cracks and the like, the production efficiency is improved, the tensile strength of the oil pipe body 1 is high, the toughness is good, the oil pipe body has good pressure resistance, fatigue resistance and cleanliness, the oil pipe body can bear the high-frequency vibration of an engine after being bent and formed, the anti-seismic performance is good, the fatigue fracture and oil leakage problems of a high-pressure oil pipe can be effectively reduced, and the high-pressure oil pipe with the same quality does not need.
Specifically, the oil pipe body 1 in this embodiment is formed by once forming a low-alloy high-strength cold-drawn seamless steel pipe with an outer diameter of 12mm and a wall thickness of 4mm, and the internal structure of the material does not have defects such as compression cracks.
In this embodiment, the high pressure resistance of the oil pipe body 1: the pressure resistance value of the oil pipe body 1 is more than or equal to 2100 Bar.
In this embodiment, the mechanical properties of the oil pipe body 1 are as follows: the tensile strength of the oil pipe body 1 is more than or equal to 390MPa, the yield strength of the oil pipe body 1 is more than or equal to 245MPa, and the elongation of the oil pipe body 1 is more than or equal to 22%.
In this embodiment, the fatigue resistance of the tubing body 1 is: the working state of the diesel engine is simulated, and the oil pipe body 1 has no cracking or oil leakage phenomenon under the test conditions that the system working pressure is more than or equal to 1400Bar, sine waves and 1000 ten thousand cycles.
In this embodiment, the deformation amount of the oil pipe body 1: the deformation of the inner hole of the oil pipe body 1 after bending is less than 10% of the aperture of the inner hole.
In this embodiment, the cleanliness of the oil pipe body 1 is: the cleanliness of particle impurities on the inner surface of the oil pipe body 1 is less than or equal to 6.3 mg.
As shown in fig. 2, one end of the split type bushing 4 is a conical surface, the other end of the split type bushing 4 is provided with an annular sealing groove, the annular sealing groove is used for installing an O-ring 5, and the conical surface of the split type bushing 4 faces the threaded connection port of the union nut 3.
Specifically, split type bush 4 includes two semi-ring bushes that set up along axial symmetry, and semi-ring bush one end is provided with semi-annular groove, and two semi-annular grooves constitute annular seal groove after two semi-ring bushes dock.
As shown in fig. 3, the manufacturing process of the oil pipe body 1 in this embodiment includes the following steps:
step 1: sorting straight steel pipes, performing eddy current flaw detection through an eddy current flaw detection detector, and detecting whether the steel pipes have the defects of cracks, sand holes, layering and the like;
step 2: cutting the prepared materials according to the unfolded length size of the oil pipe body 1;
and step 3: removing the flash and burr on the cut pipe orifice section by a chamfering machine;
and 4, step 4: grinding the surfaces of the excircles at the two ends of the pipe orifice within the range of 10-15mm by using an abrasive belt to remove burrs and a carbonized layer;
and 5: after the polished straight pipe is assembled with a connecting piece, punching and forming two ends of the straight pipe in a cold header according to the drawing size, so that two ends of the straight pipe form an upset head 2, and specifically, the sealing head of the pipe fitting is subjected to cold heading to 58 degrees;
step 6: the inner holes at two ends of the pipe fitting after cold heading forming are reduced due to compression, and the special bench drilling machine is adopted
Reaming with a twist drill to a depth of 15-20 mm;
and 7: bending and processing the pipe fitting according to the space coordinate size of the drawing by adopting a numerical control pipe bending machine, and checking the connection size of two ends of the mould, thereby processing the oil outlet pipe body 1;
and 8: a diesel oil pressure bearing test of maintaining the pressure of each oil pipe body for 1 min by adopting a pressure testing machine according to the pressure requirement of the pressure testing outline 2100 Bar;
and step 9: spraying a developer on the surface of each oil pipe body 1 by adopting a penetration development method, cooling for 5 minutes, then erasing the developer on the surface of the oil pipe body 1, carefully observing whether the developer penetrates into the oil pipe body 1, and judging whether the oil pipe body 1 cracks due to cold heading and bending;
step 10: clamping the oil pipe body 1 qualified by inspection on a cleaning machine chuck, starting a high-pressure cleaning machine, setting the cleaning pressure at 2MPa and the cleaning temperature at 50 ℃, continuously flushing for 15 seconds, and blowing compressed air out of the inner hole liquid;
step 11: the oil pipe body 1 cleaned under high pressure is placed in an oven regularly, the temperature is set to be 100 ℃, the time is 30 minutes, and residual liquid attached to the inside and the outside of the oil pipe body 1 is removed;
step 12: after the dried oil pipe body 1 is cooled, oil is injected into the inner hole of the oil pipe body 1 for rust prevention;
step 13: the dustproof plug caps are additionally arranged at the two ends of the oil pipe body 1 after being cleaned and rusted, so that secondary pollution is prevented;
step 14: and (3) packing the oil pipe body 1 with the plugging cap in a box according to the packing specification requirement (each box is less than or equal to 20 KG).
The assembling process of the high-pressure oil pipe of the rail internal combustion locomotive in the embodiment comprises the following steps:
step 1: firstly, the tail hole direction of the union nut 3 is sleeved on the oil pipe body 1, the threaded connector of the union nut 3 is noticed to face the pipe end face direction of the oil pipe body 1, and the end face identification (the content comprises a part number, a batch number, a supplier code and the like) is fixed on the union nut 3 by adopting a laser identification machine;
step 2: sleeving the two semi-ring bushings between the union nut 3 and the upset head 2, and paying attention to the fact that the conical surface faces a threaded connecting port of the union nut 3;
and step 3: an O-shaped ring 5 with the diameter of 19 multiplied by 2.5 is sleeved in an annular sealing groove of the split type bushing 4 to prevent the split type bushing 4 from falling off from the oil pipe body 1.
The principle and the implementation mode of the present invention are explained by applying specific examples in the present specification, and the above descriptions of the examples are only used to help understanding the method and the core idea of the present invention; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the concrete implementation and the application scope. In summary, the content of the present specification should not be construed as a limitation of the present invention.
Claims (7)
1. The utility model provides a rail diesel locomotive high pressure oil pipe, a serial communication port, including oil pipe body and two coupling assembling, the both ends of oil pipe body all are provided with the upset head, two coupling assembling overlaps respectively and locates the both ends of oil pipe body, just coupling assembling is located the upset head is inboard, coupling assembling includes union nut, split type bush and O type circle, union nut cover is located the tip of oil pipe body, just union nut's threaded connection mouth orientation the terminal surface of oil pipe body, split type bush cover is located on the oil pipe body, O type circle cover is located on the split type bush, split type bush set up in union nut with between the upset head, the oil pipe body adopts the seamless steel pipe of cold drawing of low alloy high strength to pass through cold-heading integrated into one piece.
2. The rail diesel locomotive high pressure oil pipe according to claim 1, wherein the pressure resistance value of the oil pipe body is greater than or equal to 2100 Bar.
3. The high-pressure oil pipe of the railway diesel locomotive according to claim 1, characterized in that the tensile strength of the oil pipe body is not less than 390MPa, the yield strength of the oil pipe body is not less than 245MPa, and the elongation of the oil pipe body is not less than 22%.
4. The rail diesel locomotive high pressure oil pipe according to claim 1, wherein the deformation of the inner bore of the oil pipe body after bending is less than 10% of the bore diameter of the inner bore.
5. The rail diesel locomotive high pressure oil pipe according to claim 1, wherein the cleanliness of particulate impurities on the inner surface of the oil pipe body is less than or equal to 6.3 mg.
6. The rail diesel locomotive high pressure oil pipe of claim 1, characterized in that split type bush one end is the conical surface, split type bush other end is provided with annular seal groove, annular seal groove is used for installing the O type circle, split type bush's conical surface towards the threaded connection mouth of union nut.
7. The rail diesel locomotive high pressure oil pipe of claim 6, wherein the split type bushing comprises two semi-ring bushings symmetrically arranged along an axial direction, one end of each semi-ring bushing is provided with a semi-annular groove, and the two semi-annular grooves form the annular sealing groove after the two semi-ring bushings are butted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021055461.6U CN212615119U (en) | 2020-06-10 | 2020-06-10 | High-pressure oil pipe of track internal combustion locomotive |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021055461.6U CN212615119U (en) | 2020-06-10 | 2020-06-10 | High-pressure oil pipe of track internal combustion locomotive |
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| Publication Number | Publication Date |
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| CN212615119U true CN212615119U (en) | 2021-02-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202021055461.6U Active CN212615119U (en) | 2020-06-10 | 2020-06-10 | High-pressure oil pipe of track internal combustion locomotive |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113107729A (en) * | 2021-04-09 | 2021-07-13 | 东风（十堰）汽车管业有限公司 | Assembly structure for eliminating damage between high-pressure oil pipe body and long bushing |
-
2020
- 2020-06-10 CN CN202021055461.6U patent/CN212615119U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113107729A (en) * | 2021-04-09 | 2021-07-13 | 东风（十堰）汽车管业有限公司 | Assembly structure for eliminating damage between high-pressure oil pipe body and long bushing |
| CN113107729B (en) * | 2021-04-09 | 2023-03-14 | 东风（十堰）汽车管业有限公司 | Assembly structure for eliminating damage between high-pressure oil pipe body and long bushing |
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