CN115157130A - Steel rail repairing water jet nozzle based on wave oscillation mixing and jet method - Google Patents
Steel rail repairing water jet nozzle based on wave oscillation mixing and jet method Download PDFInfo
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- CN115157130A CN115157130A CN202210836200.5A CN202210836200A CN115157130A CN 115157130 A CN115157130 A CN 115157130A CN 202210836200 A CN202210836200 A CN 202210836200A CN 115157130 A CN115157130 A CN 115157130A
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- abrasive
- mixing
- steel rail
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 118
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 46
- 239000010959 steel Substances 0.000 title claims abstract description 46
- 238000000034 method Methods 0.000 title claims abstract description 20
- 230000010356 wave oscillation Effects 0.000 title claims abstract description 10
- 239000002245 particle Substances 0.000 claims abstract description 63
- 239000004576 sand Substances 0.000 claims abstract description 40
- 230000010355 oscillation Effects 0.000 claims abstract description 32
- 239000007788 liquid Substances 0.000 claims abstract description 18
- 239000010437 gem Substances 0.000 claims abstract description 14
- 229910001751 gemstone Inorganic materials 0.000 claims abstract description 14
- 238000000227 grinding Methods 0.000 claims abstract description 8
- 239000000463 material Substances 0.000 claims abstract description 7
- 239000003082 abrasive agent Substances 0.000 claims description 36
- 230000001133 acceleration Effects 0.000 claims description 20
- 238000009987 spinning Methods 0.000 claims description 16
- 241000405070 Percophidae Species 0.000 claims description 10
- 230000009471 action Effects 0.000 claims description 8
- 239000004429 Calibre Substances 0.000 claims description 4
- 238000005507 spraying Methods 0.000 claims description 4
- 239000007921 spray Substances 0.000 claims description 2
- 238000002347 injection Methods 0.000 claims 1
- 239000007924 injection Substances 0.000 claims 1
- 238000005498 polishing Methods 0.000 abstract description 8
- 230000008569 process Effects 0.000 abstract description 8
- 230000008439 repair process Effects 0.000 description 8
- 230000000694 effects Effects 0.000 description 6
- 239000012530 fluid Substances 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000003754 machining Methods 0.000 description 3
- 238000004904 shortening Methods 0.000 description 3
- 238000004381 surface treatment Methods 0.000 description 3
- 239000012736 aqueous medium Substances 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 239000002609 medium Substances 0.000 description 2
- 238000003801 milling Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 229910000734 martensite Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C5/00—Devices or accessories for generating abrasive blasts
- B24C5/02—Blast guns, e.g. for generating high velocity abrasive fluid jets for cutting materials
- B24C5/04—Nozzles therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C7/00—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts
- B24C7/0007—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts the abrasive material being fed in a liquid carrier
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C9/00—Appurtenances of abrasive blasting machines or devices, e.g. working chambers, arrangements for handling used abrasive material
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
Abstract
The invention discloses a steel rail repairing water jet nozzle based on wave oscillation mixing and a jet method, wherein the nozzle comprises the following components: the high-pressure water jet unit comprises a nozzle shell (7) for fixing, a high-pressure water inlet (1), a jewel nozzle (2), a solid-liquid two-phase mixing cavity (6) and a large-caliber cylindrical accelerating section (8), wherein an abrasive interface is arranged on the side surface of the nozzle shell (7); an abrasive rotary feed unit comprising: the grinding material inlet (3) is arranged on the grinding material pipe (5) and is connected with the rotational flow sheet (4); a detachable expansion nozzle unit comprising: an expansion port (10), a duckbilled external sand pipe (11) and a fixing bolt (9). The water jet entrainment has three-dimensional speed, and the abrasive particles and the water jet in the axial direction, the radial direction and the circumference are in fluctuating oscillation and are fully mixed, so that the overall length of the nozzle can be shortened, the damage caused by the breakage in the operation process due to overlong nozzle is avoided, the large-width water jet polishing operation can be realized, the operation removal rate is higher, and the surface quality is uniform.
Description
Technical Field
The invention belongs to the technical field of abrasive water jet, and particularly relates to a steel rail repairing water jet nozzle based on wave oscillation mixing.
Background
The development of high speed and heavy load of railway transportation brings huge pressure to the steel rail, so that the problems of fatigue, abrasion and the like of the steel rail are increasingly prominent. At present, two types of safe and efficient rail grinding wagon repair and rail milling wagon repair are mostly used in China. But the steel rail grinding wagon is small in repair depth in a single repair process, manual pretreatment is needed, the machining efficiency is low, interface edges and corners are easy to leave, and the surface quality is unstable. The steel rail milling and grinding vehicle is repaired to generate metal sparks and dust, the noise is huge, the operation environment is severe, the environment is easily polluted, the working temperature is high, the surface of the steel rail is easily blued, a martensite structure with high brittleness is formed, and potential safety hazards are caused.
The ultra-high pressure abrasive water jet is a new technology represented by an ultra-high pressure abrasive water jet, adopts physical and wet operation modes, is widely applied to the aspects of steel cutting, dephosphorization and rust removal at present, and cannot cause damage to the nature of steel and pollution to the environment. Therefore, the abrasive water jet machining technology is applied to repairing the steel rail, the steel rail can be effectively polished on line, and the method has remarkable advantages compared with other polishing modes, and the steel rails of different models can be repaired by adjusting the number and the angle of the spray heads and the machining parameters such as water pressure and flow.
However, because the operation width of the abrasive water jet single nozzle is limited, the traditional round abrasive interface nozzle has small jet beam diameter, high speed, concentrated energy and small operation width, and has low efficiency and poor effect when used for material surface treatment, when the steel rail is polished, the method for repairing the steel rail profile by multi-nozzle multi-parameter operation is provided at present, but because the polishing parameters and angles are different, the operation roughness of the surface of the same transverse steel rail is difficult to be consistent, and the uniformity of material removal is not high; the traditional round abrasive interface nozzle needs to fully mix abrasive particles and water jet, so that the acceleration section of the sand pipe is too long, and when the steel rail is polished on line, the sand pipe is broken due to the fact that the sand pipe is easy to directly crash in field operation actual operation, and the operation efficiency is influenced.
In order to solve the above problems, patent CN 202192552U discloses a quasi-rectangular abrasive nozzle for abrasive water jet, which is a three-section quasi-rectangular abrasive nozzle, and completes mixing, acceleration, alignment focusing and uniform diffusion of abrasives through respective different functions of three sections to form a quasi-fan-shaped abrasive water jet. But the sand pipe acceleration section is longer, which is not beneficial to the field operation; meanwhile, the jet of the quasi-fan-shaped abrasive water jet has smaller caliber, so that the energy density and the operation width of the abrasive water jet are still smaller for the steel rail.
Disclosure of Invention
Aiming at the defects or improvement requirements of the prior art, the invention provides the steel rail repairing water jet nozzle based on the wave oscillation mixing, the overall length of the nozzle can be shortened, the damage caused by breakage in the operation process due to overlong nozzle can be avoided, the one-time full-coverage post-treatment repairing can be completed, the large-width water jet polishing operation can be realized, the operation removal rate is higher, and the surface quality is uniform. In addition, the external sand pipes of different models can be replaced to work in different working environments.
To achieve the above object, according to an aspect of the present invention, there is provided a rail repairing water jet nozzle based on wave motion oscillation mixing, including:
the high-pressure water jet unit is used for providing high-speed high-pressure water jet, entraining abrasive particles and mixing and comprises a nozzle shell, a high-pressure water flow inlet arranged at the top end in the nozzle shell, a jewel nozzle communicated with the bottom end of the high-pressure water flow inlet, a solid-liquid two-phase mixing cavity communicated with the bottom end of the jewel nozzle and a large-caliber cylindrical accelerating section communicated with the bottom end of the solid-liquid two-phase mixing cavity, wherein an abrasive interface is arranged on the side surface of the nozzle shell to realize primary pressurization of the water jet;
the abrasive material rotary supply unit is used for providing abrasive material particles and applying three-dimensional speed to the sucked abrasive material particles, and comprises an abrasive material pipe communicated with the solid-liquid two-phase mixing cavity through an abrasive material interface on the side surface of the nozzle shell, an abrasive material inlet communicated with the top of the abrasive material pipe, and a spinning disk arranged in the abrasive material pipe and used for achieving that the abrasive material particles rotate to obtain axial, radial and circumferential three-dimensional speeds, the abrasive material particles have the property that the three-dimensional speed is endowed with pseudo-elasticity after rotating through the spinning disk, and the abrasive material particles are added to excite the oscillation and fluctuation of a high-pressure water jet so as to achieve the rapid mixing of the water jet and the abrasive material particles;
the detachable expanded nozzle unit comprises an expanded port arranged at the bottom end of the large-caliber cylindrical acceleration section and a duckbilled external sand pipe communicated with the large-caliber cylindrical acceleration section through the expanded port, and water jet after primary pressurization and rotary fluctuation oscillation intensive mixing is secondarily pressurized through the large-caliber cylindrical acceleration section and is sprayed through the duckbilled external sand pipe.
Furthermore, the inner diameter of the large-caliber cylindrical acceleration section is phi 0.4 mm-phi 0.6mm, and the length is 10-15 mm.
Further, the length of the duckbilled external sand pipe is 30 mm-50 mm.
Further, the duckbill external sand pipe linearly diffuses from the cylindrical inner diameter, continuously narrows and lengthens to form a duckbill shape combining a rectangular shape and a left semicircle and a right semicircle.
Furthermore, the detachable expanded nozzle unit further comprises a fixing bolt for fixing the expanded port and the duckbilled external sand pipe.
Furthermore, the fixing bolt and the external sand pipe fixed by the expansion port can be conveniently detached, and the external sand pipes of different types can be connected to work in different operation environments.
Further, the spinning disk comprises a plurality of blades, and the blades have a certain radian.
According to another aspect of the invention, a spraying method for repairing a steel rail by full coverage of water jet based on fluctuation oscillation mixing is provided, and comprises the following steps:
the method comprises the following steps: the water flow is pressurized and accelerated through the gem nozzle, and negative pressure entrainment grinding materials are formed in the entrainment solid-liquid two-phase mixing cavity (6);
step two: the abrasive particles have three-dimensional speed after being rotated by the spinning disk, and the rotating abrasive particles and the high-pressure water jet flow are subjected to fluctuation, vibration and mixing;
step three: the abrasive particles and the water jet are further mixed in a large-caliber cylindrical accelerating section, secondary pressurization is carried out, and the steel rail is repaired by spraying through a duckbill external sand pipe.
Further, the wave oscillating mixing of the rotating abrasive particles with the high pressure water jet comprises: the abrasive particles are endowed with pseudo-elastic properties under the action of circumferential velocity and water jet entrainment, and can generate elastic-inertial oscillation after being disturbed, and the rotating abrasive particles excite the oscillation and fluctuation of the high-pressure water jet, so that the high-pressure water jet can be quickly mixed.
In general, compared with the prior art, the above technical solution contemplated by the present invention can achieve the following beneficial effects:
1. according to the steel rail repairing water jet nozzle based on fluctuation oscillation mixing, abrasive particles with three-dimensional speeds (axial, radial and circumferential) supplied by a water jet entrainment abrasive rotation supply unit of a high-pressure water jet unit are mixed and accelerated more fully, the abrasive can be fully mixed with water under the condition of shortening the length of an acceleration section, in a detachable expanded nozzle unit, the flow speed of the abrasive and the water is reduced, the abrasive particles are diffused and fully mixed with a water medium to form a large-area fan-shaped jet surface, and the expanded nozzle structure is detachable and replaced by external sand pipes of different types. The invention can shorten the overall length of the nozzle, avoid the damage caused by the overlong nozzle due to the breakage in the operation process, complete the one-time full-coverage post-treatment repair, realize the large-width water jet polishing operation, and have higher operation removal rate and uniform surface quality. In addition, the external sand pipes of different models can be replaced to work in different working environments.
2. According to the rail repairing water jet nozzle based on wave oscillation mixing, abrasive particles enter a pipeline from an abrasive inlet and are sucked into a solid-liquid two-phase mixing cavity in a spiral three-dimensional shape under the action of the vortex sheet. The abrasive particles can have three-dimensional speeds (axial, radial and circumferential) after being rotated by the spinning disk, and under the circumferential speed and the entrainment action of high-speed jet flow, the abrasive particles form stronger rotation and are diffused in the rotating process. The rotating body has a fluctuating nature under certain conditions, that is to say the rotating fluid is given a pseudo-elastic nature. Because of the action of coriolis force and centrifugal force in the rotating motion, the rotating fluid undergoes elastic-inertial oscillation after being disturbed, and elastic waves and wave motion phenomena occur, which are shear waves. The addition of rotating abrasive particles provokes oscillations and fluctuations of the high-pressure waterjet. All the components promote the abrasive particles and the water jet to generate strong turbulent mixing, so that the entrainment capacity and the mixing effect of the water jet on the abrasive particles are improved, the length of a large-caliber cylindrical accelerating section can be further shortened, the inner diameter of the large-caliber cylindrical accelerating section is phi 0.4-phi 0.6mm, the length of the large-caliber cylindrical accelerating section is 10-15 mm, and the mixing effect is equivalent to that of the traditional accelerating section. The length of the large-caliber cylindrical acceleration section is shortened, and the external special-shaped nozzle is favorably added. The whole length of the nozzle is shortened, and the damage caused by the breakage of the nozzle in the operation process is avoided.
3. According to the steel rail repairing water jet nozzle based on fluctuation, oscillation and mixing, the flow velocity at the duckbilled external sand pipe is reduced, the cross section area is duckbilled, abrasive particles are favorably diffused and are fully mixed with an aqueous medium, and a large-area fan-shaped jet surface is formed. The one-time post-treatment of the outer contour of the steel rail can be realized, the surface treatment of the steel rail can be rapidly completed with high quality, and the steel rail repairing efficiency is greatly improved. The large-caliber cylindrical acceleration section is combined with the duckbilled external sand pipe, and can be matched with a high-flow ultrahigh-pressure pump, so that pressure output can be guaranteed while flow is guaranteed, one-time full-coverage aftertreatment repair is completed, larger-width water jet polishing operation is realized, the operation removal rate is higher, and the surface quality is uniform. Through fixing bolt and external sand pipe that extends port and heavy-calibre cylindrical acceleration section trailing end connection can dismantle, the accessible is connected the external sand pipe of different models and is worked under the operation environment of difference.
4. According to the steel rail repairing water jet nozzle based on fluctuation oscillation mixing, high-pressure water flow is accelerated through the jewel nozzle and then is injected into the solid-liquid two-phase mixing cavity through the cylindrical water column, abrasive particles in the abrasive rotation supply unit are sucked through negative pressure entrainment, and finally the abrasive particles and the water flow enter the large-caliber cylindrical acceleration section together, wherein the large-caliber cylindrical acceleration section is used for fully fusing and accelerating the abrasive particles and the water jet. The high-pressure water jet unit can suck the abrasive particles through negative pressure entrainment, so that the abrasive particles are diffused and fully mixed with high-pressure water
Drawings
FIG. 1 is a schematic view of a steel rail repairing water jet nozzle based on wave oscillation mixing according to an embodiment of the present invention;
FIG. 2 is a partial schematic view of an abrasive inlet of a water jet nozzle for repairing a steel rail based on wave oscillation mixing according to an embodiment of the invention;
FIG. 3 is a schematic view of an abrasive inlet swirl plate in accordance with an embodiment of the present invention;
FIG. 4 is a bottom cross-sectional view of a steel rail repairing water jet nozzle based on wave oscillation mixing according to an embodiment of the invention;
fig. 5 is a schematic flow chart of a jet method for repairing a steel rail in a full-coverage manner by using water jets based on fluctuating oscillation mixing in an embodiment of the invention.
Throughout the drawings, like reference numerals designate like features, and in particular: 1-high-pressure water inflow, 2-gem nozzle, 3-abrasive material inlet, 4-spinning disk, 5-abrasive material pipe, 6-solid-liquid two-phase mixing cavity, 7-nozzle shell, 8-large-caliber cylindrical accelerating section, 9-fixing bolt, 10-expanding port and 11-duckbill external sand pipe.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
As shown in fig. 1, the rail repairing water jet nozzle based on wave motion oscillation mixing of the present invention includes a high pressure water jet unit, an abrasive rotation supply unit and a detachable expansion nozzle unit. Abrasive particles with three-dimensional speed (axial speed, radial speed and circumference) supplied by a water jet entrainment abrasive rotation supply unit of the high-pressure water jet unit are mixed and accelerated more sufficiently, abrasive and water can be sufficiently mixed under the condition of shortening the length of an accelerating section, in a detachable expansion nozzle unit, the flow velocity of the abrasive and the water is reduced, the abrasive particles are diffused and are sufficiently mixed with an aqueous medium to form a large-area fan-shaped jet surface, and an expansion nozzle structure can be detached and replaced by external sand pipes of different types.
The invention can shorten the overall length of the nozzle, avoid the damage caused by the overlong nozzle due to the breakage in the operation process, complete the one-time full-coverage post-treatment repair, realize the large-width water jet polishing operation, and have higher operation removal rate and uniform surface quality. In addition, the external sand pipes of different types can be replaced to work in different operation environments.
The high-pressure water jet unit comprises a high-pressure water flow inlet 1, a jewel nozzle 2, a solid-liquid two-phase mixing cavity 6 and a large-caliber cylindrical accelerating section 8 which are sequentially connected from top to bottom, and a nozzle shell 7 at the outer side of the high-pressure water flow inlet 1, the jewel nozzle 2, the solid-liquid two-phase mixing cavity 6 and the large-caliber cylindrical accelerating section 8, wherein the high-pressure water flow inlet 1 is connected with the jewel nozzle 2 through a convergent pipe. High-pressure water flow is accelerated through the gem nozzle 2 and then is injected into the solid-liquid two-phase mixing chamber 6 through a cylindrical water column, abrasive particles in the abrasive rotating supply unit are sucked through negative pressure, and finally the abrasive particles and the water flow enter the large-caliber cylindrical acceleration section 8 together, and the large-caliber cylindrical acceleration section 8 is used for fully fusing the abrasive particles and the water flow and accelerating and pressurizing. The high-pressure water jet unit can suck the abrasive particles by negative pressure, so that the abrasive particles are diffused and fully mixed with high-pressure water.
As shown in fig. 1, fig. 2 and fig. 3, the abrasive material rotary supply unit includes an abrasive material inlet 3, a spinning disk 4 and an abrasive material pipe 5, an abrasive material port is arranged on a side surface of the nozzle housing 7, the abrasive material pipe 5 is communicated with the solid-liquid two-phase mixing chamber 6 through the abrasive material port, the spinning disk 4 is fixed to the abrasive material pipe 5 through a bearing, and the abrasive material inlet 3 is connected to one end of the abrasive material pipe 5 to which the spinning disk 4 is fixed. The spinning disk 4 is provided with a plurality of blades which have certain radian. Abrasive particles enter the pipeline from the abrasive inlet 3 and are sucked into the solid-liquid two-phase mixing cavity 6 in a spiral three-dimensional roll under the action of the vortex sheet 4. According to the hydrodynamic structure of a common jet, no transverse velocity gradient exists inside the constant velocity core of the jet, so that the diffusion angle of the jet is small. The abrasive particles can have three-dimensional speed (axial, radial and circumferential) after rotating through the spinning disk, and under the entrainment effect of circumferential speed and high-speed jet flow, the abrasive particles form stronger rotation and are diffused in the rotating process. The rotating body has a fluctuating nature under certain conditions, that is to say the rotating fluid is given a pseudo-elastic nature. Because of the action of coriolis force and centrifugal force in the rotating motion, the rotating fluid undergoes elastic-inertial oscillation after being disturbed, and elastic waves and wave motion phenomena occur, which are shear waves. The addition of rotating abrasive particles provokes oscillations and fluctuations of the high-pressure waterjet. All the above components promote the abrasive particles and the water jet to generate strong turbulent mixing, thereby improving the entrainment capacity and mixing effect of the water jet on the abrasive particles, further shortening the length of the large-caliber cylindrical accelerating section 8, wherein the inner diameter of the large-caliber cylindrical accelerating section 8 is phi 0.4 mm-phi 0.6mm, the length is 10-15 mm, the mixing effect is equivalent to that of the traditional accelerating section, and the existing traditional cylindrical accelerating section needs at least 20mm length. The length of the large-caliber cylindrical accelerating section 8 is shortened, and the addition of an external special-shaped nozzle is facilitated. The whole length of the nozzle is shortened, and the damage caused by the collision and breakage in the operation process due to overlong nozzle is avoided.
As shown in fig. 1 and 4, the detachable expanded nozzle unit includes a fixing bolt 9, an expanded port 10, and a duckbill external sand tube 11. The tail end of the large-caliber cylindrical accelerating section 8 is connected with the top of a duckbilled external sand pipe 11 through an expanding port 10 and a fixing bolt 9, and the length of the duckbilled external sand pipe 11 is 30-50 mm. The duckbilled external sand pipe 11 is linearly diffused from the cylindrical inner diameter, is continuously narrowed and lengthened, and is combined with a left semicircle and a right semicircle in a rectangular mode. The flow velocity at the duckbilled external sand pipe 11 is reduced, the cross section area is duckbilled, which is beneficial to the dispersion of abrasive particles and the sufficient mixing with water medium, and a large-area fan-shaped jet surface is formed. The one-time post-treatment of the outer contour of the steel rail can be realized, the surface treatment of the steel rail can be completed quickly and with high quality, and the steel rail repairing efficiency is greatly improved. The large-caliber cylindrical accelerating section 8 is combined with the duckbilled external sand pipe 11, and can be matched with a high-flow ultrahigh-pressure pump, so that pressure output can be guaranteed while flow is guaranteed, one-time full-coverage aftertreatment repair is completed, larger-width water jet polishing operation is realized, the operation removal rate is higher, and the surface quality is uniform. The external sand pipe connected with the tail end of the large-caliber cylindrical acceleration section 8 through the fixing bolt 9 and the expansion port 10 can be detached, and the external sand pipes of different types can be connected to work under different operation environments.
In the embodiment of the invention, a jet method for repairing a steel rail in a full-coverage manner by using water jet based on fluctuating oscillation mixing is provided, and comprises the following steps:
the method comprises the following steps: the water flow is pressurized and accelerated through the gem nozzle 2, and negative pressure entrainment grinding materials are formed in the entrainment solid-liquid two-phase mixing cavity 6;
step two: the abrasive particles have three-dimensional speed after being rotated by the spinning disk 4, and the rotating abrasive particles and the high-pressure water jet flow are subjected to fluctuation, oscillation and mixing;
step three: the abrasive particles and the water jet are further mixed in the large-caliber cylindrical accelerating section 8, secondary pressurization is carried out, and the steel rail is repaired by spraying through a duckbill external sand pipe.
Specifically, the wave oscillating mixing of the rotating abrasive particles with the high-pressure water jet comprises: the abrasive particles are endowed with pseudo-elastic properties under the action of circumferential velocity and water jet entrainment, and can generate elastic-inertial oscillation after being disturbed, and the rotating abrasive particles excite the oscillation and fluctuation of the high-pressure water jet, so that the high-pressure water jet can be quickly mixed.
It will be understood by those skilled in the art that the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the invention, and that any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (9)
1. A rail repairing water jet nozzle based on wave oscillation mixing is characterized by comprising:
the high-pressure water jet unit is used for providing high-speed high-pressure water jet, entraining abrasive particles and mixing, and comprises a nozzle shell (7), a high-pressure water flow inlet (1) arranged at the top end in the nozzle shell (7), a jewel nozzle (2) communicated with the bottom end of the high-pressure water flow inlet (1), a solid-liquid two-phase mixing cavity (6) communicated with the bottom end of the jewel nozzle (2), and a large-caliber cylindrical accelerating section (8) communicated with the bottom end of the solid-liquid two-phase mixing cavity (6), wherein an abrasive interface is arranged on the side surface of the nozzle shell (7) to realize primary pressurization of the water jet;
the abrasive material rotary supply unit is used for providing abrasive material particles and applying three-dimensional speed to the sucked abrasive material particles, and comprises an abrasive material pipe (5) communicated with the solid-liquid two-phase mixing cavity (6) through an abrasive material interface on the side surface of the nozzle shell (7), an abrasive material inlet (3) communicated with the top of the abrasive material pipe (5), and a spinning disk (4) arranged in the abrasive material pipe (5) and used for achieving that the abrasive material particles obtain axial, radial and circumferential three-dimensional speeds through rotation, the abrasive material particles have pseudo-elastic properties through the three-dimensional speeds after being rotated by the spinning disk (4), and the abrasive material particles are added to excite the oscillation and fluctuation of high-pressure water jet so as to achieve the rapid mixing of the water jet and the abrasive material particles;
a can dismantle and expand nozzle unit that is used for abrasive particle and water intensive mixing, forms large tracts of land fan-shaped efflux face, it is including locating expansion port (10) of heavy-calibre cylindrical acceleration section (8) bottom, through expand port (10) with the external sand pipe of duckbilled type (11) of heavy-calibre cylindrical acceleration section (8) intercommunication, through the water jet after the intensive mixing is vibrated in pressurization and rotation passes through the heavy-calibre cylindrical acceleration section (8) carry out the secondary pressurization and spray through the external sand pipe of duckbilled type (11).
2. The steel rail repairing water jet nozzle based on wave motion oscillation mixing as claimed in claim 1, wherein the inner diameter of the large-caliber cylindrical acceleration section (8) is phi 0.4 mm-phi 0.6mm, and the length is 10-15 mm.
3. The steel rail repairing water jet nozzle based on wave motion oscillation mixing as claimed in claim 1, wherein the duckbill external sand tube (11) has a length of 30mm to 50mm.
4. The rail repairing water jet nozzle based on wave motion oscillation mixing as claimed in claim 2, wherein the duckbill external sand tube (11) is linearly diffused from the cylindrical inner diameter, is continuously narrowed and lengthened, and is formed into a duckbill shape combining a rectangular shape and a left semicircle and a right semicircle.
5. The steel rail repairing water jet nozzle based on wave motion oscillation mixing of claim 1, wherein the detachable expansion nozzle unit further comprises a fixing bolt (9) for fixing the expansion port (10) and a duckbill external sand pipe (11).
6. The steel rail repairing water jet nozzle based on wave motion oscillation mixing of claim 5, wherein the external sand pipe fixed by the fixing bolt (9) and the expansion port (10) can be conveniently disassembled, and the steel rail repairing water jet nozzle can work under different working environments by connecting different types of external sand pipes.
7. The steel rail repairing water jet nozzle based on wave motion oscillation mixing as claimed in claim 1, wherein the spinning disk (4) comprises a plurality of blades, and the blades have a certain radian.
8. A jet method for repairing a steel rail in a full-coverage mode by water jet based on fluctuating oscillation mixing is characterized by comprising the following steps:
the method comprises the following steps: the water flow is pressurized and accelerated through the gem nozzle (2), and negative pressure entrainment grinding materials are formed in the entrainment solid-liquid two-phase mixing cavity (6);
step two: the abrasive particles have three-dimensional speed after being rotated by the spinning disk (4), and the rotating abrasive particles and the high-pressure water jet flow are subjected to fluctuation, vibration and mixing;
step three: the abrasive particles and the water jet are further mixed in a large-caliber cylindrical accelerating section (8) and pressurized for the second time, and the steel rail is repaired by the injection of a duckbill external sand pipe.
9. The method for spraying the full-coverage repaired steel rail with the water jet based on the wave motion oscillation mixing as claimed in claim 8, wherein the wave motion oscillation mixing of the rotating abrasive particles and the high-pressure water jet comprises: the abrasive particles are endowed with pseudo-elastic properties under the action of circumferential velocity and water jet entrainment, and can generate elastic-inertial oscillation after being disturbed, and the rotating abrasive particles excite the oscillation and fluctuation of the high-pressure water jet, so that the high-pressure water jet can be quickly mixed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210836200.5A CN115157130A (en) | 2022-07-15 | 2022-07-15 | Steel rail repairing water jet nozzle based on wave oscillation mixing and jet method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210836200.5A CN115157130A (en) | 2022-07-15 | 2022-07-15 | Steel rail repairing water jet nozzle based on wave oscillation mixing and jet method |
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|---|---|
| CN115157130A true CN115157130A (en) | 2022-10-11 |
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| CN202210836200.5A Pending CN115157130A (en) | 2022-07-15 | 2022-07-15 | Steel rail repairing water jet nozzle based on wave oscillation mixing and jet method |
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