CN107674961B - Intermediate frequency heat treatment mechanism for suspension type steel rail flash butt welding - Google Patents
Intermediate frequency heat treatment mechanism for suspension type steel rail flash butt welding Download PDFInfo
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- CN107674961B CN107674961B CN201710982481.4A CN201710982481A CN107674961B CN 107674961 B CN107674961 B CN 107674961B CN 201710982481 A CN201710982481 A CN 201710982481A CN 107674961 B CN107674961 B CN 107674961B
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/04—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for rails
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/34—Methods of heating
- C21D1/42—Induction heating
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The application provides a suspension type steel rail flash butt welding intermediate frequency heat treatment mechanism, including intermediate frequency heat treatment mechanism (1), welding machine static frame (2), welding machine movable frame (3) and mounted frame (4), its characterized in that, intermediate frequency heat treatment mechanism (1) is fixed in welding machine static frame (2) and welding machine movable frame (3) between, and welding machine static frame (2) and welding machine movable frame (3) top are fixed through mounted frame (4) connection. The suspension type steel rail flash butt welding medium-frequency heat treatment mechanism realizes flash welding of steel rails and joint heat treatment in a locking state at one time, integrates the working procedures into one, and saves working time by at least one time for site construction. By the heat treatment slag blocking mechanism, effective isolation between welding spatter and the heat treatment mechanism during steel rail welding is realized.
Description
Technical Field
The invention relates to the field of steel rail welding in the railway industry, in particular to a suspension type steel rail flash butt welding medium-frequency heat treatment mechanism.
Background
After flash butt welding of steel rail, the local area of the joint is affected by high temperature heating, and the crystal grains are seriously coarsened, so that the toughness and plasticity of metal are obviously reduced, and the impact toughness and elongation rate can be improved by more than one time through joint heat treatment and crystal grain refinement. On the other hand, the heat treatment and the air cooling of the joint possibly cause hardness reduction and large-area softening in the area of excessive heating, and the phenomenon of low collapse occurs in the use process of the joint, so that a specific area quick cooling method is designed, the good rail head hardness is matched with the base metal, the overall quality of the joint can be close to that of the base metal, and therefore, in China, the heat treatment of welding the joint is carried out after the welding of the steel rail in a factory (or in a base) or on site is required.
Because the flash welding equipment and the joint heat treatment equipment have large power and complex structure, the equipment has huge volume and weight, and the two equipment are respectively arranged at different stations of a production line in a rail welding factory (or a base), so that two processes are completed in a flow production mode. In the field, the welding and the heat treatment are divided into two devices, the operation also needs two operation vehicles, and the operation is carried out step by step, so that the complicated operation difficulty is greatly improved, and the time and the overall welding cost are also greatly increased.
The most central technology is to design a set of induction coils with the same heating performance, but the structure must be microminiaturized, and the induction coils can be placed at the rail joint parts in an automatic sealing way after the flash welding is finished; the mechanism also needs to meet the requirement that the iron-based splash generated by the welding machine in the steel rail welding process is effectively isolated from the iron-based splash, and the problem that the effective heating power is reduced or short-circuited due to the fact that the splash generates vortex in the medium-frequency heating process is avoided.
Currently, there are two methods for on-line rail flash welding and joint heat treatment of rail lines: the more mature or common method is to respectively adopt two devices, namely a steel rail flash welding machine and a joint heat treatment machine, such as Chinese inventions ZL98106266.0 and ZL 201010578792.2 and the invention patent with application number 2014105784301; another is a two-in-one heat treatment machine using flash welder and flame heating, such as the patent of China patent application No. 201510436107.5.
The invention is characterized in that two devices are needed to be adopted for welding or heat treatment to respectively finish two processes of welding and heat treatment, and one machine cannot realize two functions. The individual steel rail flash welding machine can perform post-welding slow cooling heating, but the effect is very limited due to the adoption of resistance heating, and only post-welding low-power post-heating can be performed, so that the slow cooling effect can be realized on a welded joint, and the re-heating to austenitization (the temperature reaches over Ac 1) can not be realized, so that the real heat treatment (such as normalizing) can not be formed.
The invention ZL98106266.0 and ZL 201010578792.2 respectively provide two flash butt welding steel rail welding machines, which are all suspension type steel rail flash welding machines and can be used for welding steel rails on a base or on site. The suspension type steel rail flash welding machine can be installed on a flat car, the welding machine is transported to the site through a locomotive, the welding machine is placed on two sides of a steel rail to be welded through a crane, a clamping oil cylinder is started, a movable frame and a static frame jaw are clamped, a welding transformer is connected, the end face of the steel rail is electrified and heated, and after the temperature of the end face reaches the requirement, upsetting welding is completed. The welding machine is characterized in that a welding joint heat treatment mechanism is not arranged and cannot be installed, so that joint heat treatment cannot be carried out.
The invention patent with application number 2014105784301 provides pressure maintaining normalizing equipment and method for on-line steel rail welding joints, and the invention is characterized in that the steel rail welding joints can be subjected to heat treatment under the state of no longitudinal tensile stress. And (3) opening the vehicle carrying the heat treatment machine to the joint part, putting down the heat treatment machine, clamping two ends of the joint by a jaw of the heat treatment machine, and then carrying out heat treatment on the joint. When the steel rail welding joint is heated, the strength of the welding seam is reduced due to the temperature rise, at the moment, the clamping ends at the two ends of the steel rail welding joint bear the longitudinal tensile force of the steel rail, the strength of the welding seam is reduced, but the welding seam is not subjected to the tensile force, or only subjected to the extremely small tensile force, and the welding seam is ensured not to deform or generate internal defects. After the heat treatment is finished, the strength of the welding seam is gradually increased along with the decrease of the temperature until the temperature reaches the normal temperature. The austenite grains of the welded joint after heat treatment are refined, the strength and toughness are greatly improved compared with those of the welded joint, and the whole process of flash welding the steel rail is finished after the clamping mechanism of the heat treatment machine is removed. The heat treatment machine is characterized in that the heat treatment machine head is large in size, and a heating coil, a clamping system, a cooling system, an intermediate frequency transformer and the like are large and cannot be arranged in a welding machine, so that the heat treatment in the welding machine cannot be directly carried out.
Disclosure of Invention
In order to overcome the existing defects, the invention provides a suspension type steel rail flash butt welding medium-frequency heat treatment mechanism.
The utility model provides a suspension type rail flash butt welding intermediate frequency heat treatment mechanism, includes intermediate frequency heat treatment mechanism, the quiet frame of welding machine, the welding machine moves frame and mounted frame, intermediate frequency heat treatment mechanism is fixed in between the quiet frame of welding machine and the welding machine moves the frame, and the quiet frame of welding machine is fixed with the welding machine moves the frame top through the mounted frame connection.
The medium-frequency heat treatment mechanism comprises a heat treatment fixing frame, a medium-frequency transformer, a coil clamping frame, a water collector, an air spraying cooling mechanism and a coil seat, wherein the medium-frequency transformer, the coil clamping frame and the water collector are arranged on the heat treatment fixing frame, a heating coil is arranged on the coil seat, a swinging arm is arranged on the coil seat and is connected with the coil clamping frame through a coil clamping oil cylinder, the coil clamping frame is connected with a coil lifting oil cylinder and is fixed on the heat treatment fixing frame, and the water collector is connected with the air spraying cooling mechanism at the upper end inside the coil clamping frame.
The water collector is divided into a left water inlet water collector, a left water outlet water collector, a right water inlet water collector and a right water outlet water collector, the heating coil is divided into a left heating coil and a right heating coil, wherein the lower end of the left heating coil is connected with the left water inlet water collector, and the lower end of the right heating coil is connected with the right water inlet water collector; the upper end of the left heating coil is connected with the left water outlet collector, and the upper end of the right heating coil is connected with the right water outlet collector.
In the air-jet cooling mechanism, an air inlet end on a heat treatment fixing frame is connected with a first soft air pipe and a second soft air pipe through a three-way valve, wherein the first soft air pipe is connected with a first air nozzle, and the first air nozzle is provided with a first air jet hole and a second air jet hole; the second soft air pipe is connected with a second air nozzle, and a third air nozzle and a fourth air nozzle are arranged on the second air nozzle.
The suspension type steel rail flash butt welding medium-frequency heat treatment mechanism further comprises a slag blocking mechanism of the steel rail flash welding machine, the slag blocking mechanism comprises an upsetting shaft baffle, a horizontal baffle and an inclined baffle, the upsetting shaft baffle is a ninety-degree metal plate, two ends of the slag blocking plate are non-metal and sleeved on an upsetting shaft, one end of the slag blocking plate of the upsetting shaft is fixed on a movable frame, the other end of the slag blocking plate of the upsetting shaft is arranged on an upsetting shaft sleeve, the horizontal baffle is fixed above two upsetting shaft baffles and positioned in the middle of a welding part of a heating coil and a steel rail, the inclined baffle is obliquely arranged on one side of a static frame of the horizontal baffle, the inclined baffle is made of insulating materials, one side of the inclined baffle is arranged on one side of the static frame of the horizontal baffle, and the other side of the inclined baffle is arranged on the side surface of the static frame.
The suspension type steel rail flash butt welding medium-frequency heat treatment mechanism realizes flash welding of steel rails and joint heat treatment in a locking state at one time, integrates the working procedures into one, and saves working time by at least one time for site construction; by the heat treatment method of the steel rail flash welding head, the whole welding seam of the welding joint and austenite crystal grain refinement of a welding overheat area are realized, the hardness of the rail head of the welding joint is improved, the width of a softening zone is controlled, the toughness of rail web and rail foot is ensured, and embrittlement is avoided. By the heat treatment slag blocking mechanism, effective isolation between welding spatter and the heat treatment mechanism during steel rail welding is realized.
Drawings
Fig. 1 is a schematic diagram of a suspension type rail flash butt welding medium frequency heat treatment mechanism.
Fig. 2 is a schematic structural diagram of an intermediate frequency heat treatment mechanism.
Fig. 3 is a schematic view of a water collector connection.
Fig. 4 is a schematic diagram of an air-jet cooling mechanism.
FIG. 5 is a schematic view of a slag blocking mechanism.
Detailed Description
The invention provides a suspension type steel rail flash butt welding medium-frequency heat treatment mechanism which is described in detail below with reference to the accompanying drawings and specific embodiments.
Fig. 1 shows a suspension type steel rail flash butt welding medium frequency heat treatment mechanism, which comprises a medium frequency heat treatment mechanism 1, a welding machine static frame 2, a welding machine movable frame 3 and a suspension bracket 4, and is characterized in that the medium frequency heat treatment mechanism 1 is fixed between the welding machine static frame 2 and the welding machine movable frame 3, and the top ends of the welding machine static frame 2 and the welding machine movable frame 3 are fixedly connected through the suspension bracket 4.
Fig. 2 and 3 show that the intermediate frequency heat treatment mechanism 1 comprises a heat treatment fixing frame 11, an intermediate frequency transformer 12, a coil clamping frame 13, a water collector 18, an air-spraying cooling mechanism 10 and a coil seat 16, wherein the intermediate frequency transformer 12, the coil clamping frame 13 and the water collector 18 are arranged on the heat treatment fixing frame 11, a heating coil 17 is arranged on the coil seat 16, a swinging arm 15 is arranged on the coil seat 16, the swinging arm 15 is connected with the coil clamping frame 13 through a coil clamping cylinder 14, the coil clamping frame 13 is connected with a coil lifting cylinder 19 and is fixed on the heat treatment fixing frame 11, and the water collector 18 is connected with the air-spraying cooling mechanism 10 at the upper end inside the coil clamping frame 13.
The medium frequency induction heating mechanism 1 is positioned above the steel rail, wherein the heating coil 17 can move up and down above the welding part of the steel rail or the welding part, when the welding joint is required to be subjected to heat treatment, the heating coil 17 can automatically descend to the steel rail joint, the coil forms a closed loop, and the coil is connected with the secondary side of the medium frequency transformer 12 to heat the welding joint. The heat treatment method is that firstly, the electromagnetic vortex generated by the heating coil 17 is utilized to heat the rail welding joint to a temperature above the solid phase transition temperature, then the softened bands of the rail heads at the two sides of the heating part are sprayed and cooled, and when the joint is cooled to the pearlite transformation completion, the whole welding and heat treatment are completed.
The action of the medium-frequency induction heating mechanism is divided into a heating coil lifting part and a coil clamping part, and is respectively completed by a lifting oil cylinder and a coil clamping oil cylinder. The fixed mount is fixedly connected with a middle shaft of the suspension type steel rail flash welding machine, a linear bearing rail and a lifting oil cylinder base are arranged on the fixed mount in the vertical direction, a lifting oil cylinder body is fixed on the fixed mount, and a piston is connected with the lifting frame. The lifting frame is provided with a linear bearing which can move up and down along a linear bearing track. Hydraulic oil enters the lifting oil cylinder through the lifting oil pipe, so that the lifting frame is driven to move up and down. The intermediate frequency transformer is arranged on the lifting frame, the primary of the transformer is connected with an intermediate frequency power supply, and the secondary of the transformer is contacted with the connecting surface of the heating coil. The lifting frame is hinged with the cylinder body of the clamping oil cylinder, the piston rod of the clamping oil cylinder is hinged with the supporting point of the swinging arm, one end of the swinging arm is hinged with the lifting frame, and the other end of the swinging arm is hinged with the coil frame. When hydraulic oil enters the clamping oil cylinder through the clamping oil pipe, the heating coil can be opened or closed. When the coil is opened, the coil can transversely cross the steel rail welding joint, after crossing the rail bottom and closing, the upper end is contacted with the secondary of the intermediate frequency transformer, the lower end is contacted with the coil, and the clamping oil cylinder is in a compression state due to pressure, so that the contact point is in good conduction. Each heating coil is independently cooled, the inside of the coil is hollow, and two ends of the coil are respectively connected with the water collector.
The water collector 18 is divided into a left water inlet water collector 181, a left water outlet water collector 182, a right water inlet water collector 183 and a right water outlet water collector 184, the heating coil 17 is divided into a left heating coil 171 and a right heating coil 172, wherein the lower end of the left heating coil 171 is connected with the left water inlet water collector 181, and the lower end of the right heating coil 172 is connected with the right water inlet water collector 183; the upper end of the left heating coil 171 is connected with the left water outlet collector 182, and the upper end of the right heating coil 172 is connected with the right water outlet collector 184.
When the medium-frequency coil heats the steel rail welding joint to the phase transition temperature, the heating is stopped, and the accelerated cooling is needed for improving the hardness of the joint, so that the air spraying mechanism is used for spraying air.
In the air spraying cooling mechanism 10 shown in fig. 4, an air inlet end 101 on a heat treatment fixing frame 11 is connected with a first soft air pipe 103 and a second soft air pipe 104 through a three-way valve 102, wherein the first soft air pipe 103 is connected with a first air spray head 106, and a first air spray hole 1061 and a second air spray hole 1062 are arranged on the first air spray head 106; the second soft air pipe 104 is connected with the second gas nozzle 105, and a third gas nozzle 1051 and a fourth gas nozzle 1052 are arranged on the second gas nozzle 105.
Two air injection holes are formed in two ends of each air injection head, the two air injection holes correspond to rail head softening strip parts of the welding joints respectively, and the sprayed air directly cools rail gauge angles of the welding joints.
The air jet holes are arranged at the softening zone (junction of medium-frequency heating phase transition and non-phase transition) of the welding joint, and only the rail head softening zone is subjected to air jet. In the middle frequency coil heating process, the transition area between the phase change part of the steel rail heating at the two sides of the coil with the lowest hardness and the parent metal is not phase-changed, and the hardness is lowest because the area is only heated to the critical phase change temperature, the temperature is relatively low, and no phase change exists. The hardness of the softening strips can be improved to the greatest extent by spraying air to the parts with the lowest hardness, the width of the softening strips is reduced, meanwhile, the excessive hardness improvement of the phase change region between the softening strips can be prevented, and the embrittlement of the surface of the rail top is avoided. Because the range of the air spraying is greatly reduced, the total amount of the air spraying is greatly reduced, and meanwhile, the toughness of the rail web or the rail foot can be maintained. In the heat treatment method, the air spraying at the rail web and the rail bottom is canceled, so that the cooling speed of the rail web and the rail foot at the parts with thinner steel rail thickness is greatly reduced, thus not only solving the problem of wear resistance of the rail head, but also solving the problem that the rail web and the rail foot have good toughness and prevent brittle fracture. Therefore, the heat treatment cooling mode of the welding joint is improved, not only energy is saved, but also excellent joint mechanical property is obtained.
As shown in fig. 5, the suspension type intermediate frequency heat treatment mechanism for flash butt welding of steel rails further comprises a slag blocking mechanism of the flash welding machine of steel rails, the slag blocking mechanism comprises an upsetting shaft baffle plate 51, a horizontal baffle plate 52 and an inclined baffle plate 53, the upsetting shaft slag blocking plate 51 is a ninety-degree metal plate, two ends of the slag blocking plate are non-metal and sleeved on the upsetting shaft, one end of the upsetting shaft slag blocking plate 51 is fixed on the movable frame 3, and the other end of the slag blocking plate is placed on the upsetting shaft sleeve, and the upsetting shaft baffle can move along the horizontal follow-up frame in the installation state because the slag blocking plate is placed at one end of the shaft sleeve and is not constrained in the horizontal direction. The horizontal baffle plate 52 is fixed above the two upsetting shaft stops and is positioned in the middle of the welding part of the heating coil 17 and the steel rail, the inclined baffle plate 53 is obliquely arranged on one side of the static frame 2 of the horizontal baffle plate 52, the inclined baffle plate 53 is made of insulating materials, one side of the inclined baffle plate 53 is arranged on one side of the static frame 2 of the horizontal baffle plate 52, and the other side of the inclined baffle plate is arranged on the side surface of the static frame 2, so that secondary welding splashes which are bounced back on the side surface of the static frame are isolated from the medium-frequency heating coil.
The slag blocking mechanism effectively isolates the intermediate frequency induction coil from the welding part of the steel rail, and simultaneously can ensure that welding is carried out.
The suspension type steel rail flash welding heat treatment machine can realize field steel rail flash welding and heat treatment under a clamping state after welding, solves the problems that in the past, the field steel rail flash welding and joint heat treatment are required to be completed by two operation trains and divided into two skylight points respectively, has low efficiency and high cost, and greatly improves the production efficiency;
the steel rail flash welding head can be uniformly heated to be above the austenitizing temperature, and the heat treatment cooling speed of the joint can be controlled, so that the heat treatment method required by the invention can be effectively completed;
the heat treatment method of the movable flash welding head of the suspension type steel rail can improve the plasticity and the toughness of the flash welding head of the steel rail by one time, the hardness of the rail head part reaches the same level as that of a base metal, and the problem of reduced toughness due to higher hardness of rail web and rail foot in the past is solved.
Examples
When the steel rail is welded, a coil lifting cylinder in the intermediate frequency induction heating mechanism is in an elongation state, and an intermediate frequency heating coil and an intermediate frequency transformer which are positioned on the coil lifting frame are positioned at the highest position of the linear bearing rail. Because the heat treatment is medium-frequency alternating current, ferromagnetic splashes generated during welding can generate heating phenomena during heat treatment and heating, and short circuits can be directly caused during severe cases, the welding splashes must be strictly blocked.
Two upsetting shaft slag baffles which are bilaterally symmetrical are respectively fixed on upsetting shafts of the welding machine, one insulating end of each upsetting shaft slag baffle is fixed at the movable frame, and the other insulating end is arranged on the upsetting shaft sleeve of the static frame. And then the horizontal slag baffle is arranged above the two upsetting shaft slag baffles and connected with the upsetting shaft slag baffles, the horizontal slag baffle is leaned against one side of the movable frame, and at the moment, the steel rail welding part and the medium-frequency heating coil are just positioned above and below the horizontal slag baffle, and the steel rail welding part and the medium-frequency heating coil are isolated by the metal slag baffle. Then, one end of the inclined slag baffle is placed above one side of the horizontal slag baffle static frame, and the other end of the inclined slag baffle is placed on the side surface of the static frame, so that one side of the static frame of the steel rail welding part is isolated from the medium-frequency heating coil.
When the steel rail is welded, the hot splash generated by welding is directly beaten on the horizontal slag baffle, and the horizontal slag baffle is made of metal, so that the steel rail cannot be damaged, and meanwhile, the hot splash can be effectively prevented from being beaten on the intermediate frequency heating coil directly to pollute the intermediate frequency heating coil. The splash baffle can prevent splashing of the intermediate frequency heating coil from being generated at the end part of the static frame and secondarily reflected to the intermediate frequency heating coil, and the insulating material is not damaged even if the splash baffle is arranged on the insulating plate due to the lower secondary splashing temperature.
And after the welding is finished, withdrawing all slag baffles, and finishing the welding. The coil clamping cylinder of the intermediate frequency heat treatment mechanism is shortened when the heat treatment program is started, and the cylinder body of the coil clamping cylinder is hinged with the heat treatment lifting frame, the piston of the coil clamping cylinder is hinged with the middle part of the clamping arm, and two ends of the clamping arm are respectively hinged with the heat treatment lifting frame and the intermediate frequency heating coil seat. After the bottom of the intermediate frequency heating coil is opened, the middle gap exceeds the width of the rail bottom of the steel rail, then, the lifting oil cylinder is started to shorten the intermediate frequency heating coil, and at the moment, the lifting arm moves downwards along the linear bearing track to drive the intermediate frequency heating coil and the intermediate frequency transformer to move downwards. When the bottom of the intermediate frequency coil reaches the rail bottom, the clamping oil cylinder is started again to extend, so that the intermediate frequency heating coil is closed, the intermediate frequency heating coil is connected to the secondary of the intermediate frequency transformer in a closed mode, and the intermediate frequency heating coil is sleeved at the welding joint of the steel rail in a closed mode.
At this time, the rail welded joint is not cooled to pearlite transformation, a wind spraying device in the heat treatment mechanism is started, the rail welded joint is cooled in an accelerating way, and wind spraying is stopped after the rail welded joint is cooled to pearlite transformation. After the air spraying is stopped, an intermediate frequency power supply is started, the intermediate frequency alternating current enables the steel rail welding joint to be heated through the coil, after the temperature exceeds the solid phase transformation temperature, the heating current is stopped or reduced after the steel rail is subjected to austenite transformation, and the steel rail is cooled to the room temperature slowly. Some rails with a low alloy composition simply stop heating and do not have sufficient hardness, for which reason the air-jet system must be turned on and the air-jet location selected on the heat-treated softening zone in the region of the welded joint head. The cooling of the softening strip is accelerated, so that the hardness reduction area of the softening strip is reduced, and the problem of higher hardness in the joint heat treatment area is also reduced. In addition, because the rail web and the rail foot of the steel rail are not worn in the use process, the rail web or the rail foot does not need to spray air.
Cooling begins from the softening strip and spreads from the ends to the center of the weld, and the intermediate region of the rail head is maintained at a level substantially equivalent to the base material by ensuring that the hardness is not too high by a cooling rate slower than that of the softening strip due to the higher heating temperature. Compared with the existing uniform cooling method, the hardness of the rail head softening strip is improved, the hardness of the joint heating area is reduced to be closer to that of a base metal, the rail waist and the rail bottom are not cooled, and the toughness is obviously improved. In addition, since the sectional area of the overall nozzle is greatly reduced, the required gas is reduced, and the cost of compressed gas can be greatly saved.
Finally, it should be noted that the above embodiments are only intended to describe the technical solution of the present invention and not to limit the technical method, the present invention extends to other modifications, variations, applications and embodiments in application, and therefore all such modifications, variations, applications, embodiments are considered to be within the spirit and scope of the teachings of the present invention.
Claims (3)
1. The utility model provides a suspension type steel rail flash butt welding intermediate frequency heat treatment mechanism, includes intermediate frequency heat treatment mechanism (1), welding machine static frame (2), welding machine movable frame (3) and mounted frame (4), its characterized in that, intermediate frequency heat treatment mechanism (1) is fixed in between welding machine static frame (2) and the welding machine movable frame (3), and welding machine static frame (2) and welding machine movable frame (3) top are connected fixedly through mounted frame (4), intermediate frequency heat treatment mechanism (1) including heat treatment mount (11), intermediate frequency transformer (12), coil clamping frame (13), water collector (18), air-jet cooling mechanism (10) and coil holder (16), wherein, intermediate frequency transformer (12), coil clamping frame (13) and water collector (18) are installed on heat treatment mount (11), and heating coil (17) set up on coil holder (16), set up swing arm (15) on coil holder (16), swing arm (15) are through coil clamping cylinder (14) connecting wire coil clamping frame (13), coil clamping frame (13) connecting wire lift-down hydro-cylinder (19) and are fixed on heat treatment mount (11) water collector (18) internal portion air-jet cooling mechanism (10),
the suspension type steel rail flash butt welding medium-frequency heat treatment mechanism also comprises a slag blocking mechanism of the steel rail flash welding machine, wherein the slag blocking mechanism comprises an upsetting shaft slag blocking plate (51), a horizontal baffle plate (52) and an inclined baffle plate (53); the upsetting shaft slag baffle (51) is a ninety-degree metal plate, two ends of the upsetting shaft slag baffle are non-metal and are sleeved on the upsetting shaft, one end of the upsetting shaft slag baffle (51) is fixed on the movable frame (3), and the other end of the upsetting shaft slag baffle is arranged on the upsetting shaft sleeve; the horizontal baffle plate (52) is fixed above the two upsetting shaft baffles and is positioned in the middle of a welding part of the heating coil (17) and the steel rail, one side of the static frame (2) of the horizontal baffle plate (52) is obliquely provided with the inclined baffle plate (53), the inclined baffle plate (53) is made of insulating materials, one side of the inclined baffle plate is arranged on one side of the static frame (2) of the horizontal baffle plate (52), and the other side of the inclined baffle plate is arranged on the side face of the static frame (2).
2. The suspension type steel rail flash butt welding medium frequency heat treatment mechanism according to claim 1, wherein the water collector (18) is divided into a left water inlet water collector (181), a left water outlet water collector (182), a right water inlet water collector (183) and a right water outlet water collector (184), the heating coil (17) is divided into a left heating coil (171) and a right heating coil (172), wherein the lower end of the left heating coil (171) is connected with the left water inlet water collector (181), and the lower end of the right heating coil (172) is connected with the right water inlet water collector (183); the upper end of the left heating coil (171) is connected with the left water outlet collector (182), and the upper end of the right heating coil (172) is connected with the right water outlet collector (184).
3. The suspension type steel rail flash butt welding medium-frequency heat treatment mechanism according to claim 1, wherein in the air-jet cooling mechanism (10), an air inlet end (101) on a heat treatment fixing frame (11) is connected with a first soft air pipe (103) and a second soft air pipe (104) through a three-way valve (102), the first soft air pipe (103) is connected with a first air nozzle (106), and a first air nozzle hole (1061) and a second air nozzle hole (1062) are formed in the first air nozzle (106); the second soft air pipe (104) is connected with a second air nozzle (105), and a third air nozzle (1051) and a fourth air nozzle (1052) are arranged on the second air nozzle (105).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710982481.4A CN107674961B (en) | 2017-10-20 | 2017-10-20 | Intermediate frequency heat treatment mechanism for suspension type steel rail flash butt welding |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710982481.4A CN107674961B (en) | 2017-10-20 | 2017-10-20 | Intermediate frequency heat treatment mechanism for suspension type steel rail flash butt welding |
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| CN107674961A CN107674961A (en) | 2018-02-09 |
| CN107674961B true CN107674961B (en) | 2023-05-26 |
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| CN109940254A (en) * | 2019-04-22 | 2019-06-28 | 中国铁道科学研究院集团有限公司金属及化学研究所 | The operating method of rail flash welding and post weld heat treatment all-in-one machine |
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| CN2928354Y (en) * | 2006-07-18 | 2007-08-01 | 铁道科学研究院金属及化学研究所 | Fixing type steel rail flash welder |
| CN100482812C (en) * | 2006-09-12 | 2009-04-29 | 攀枝花钢铁(集团)公司 | Rail heat processing method and rail heat processing unit |
| CN202030785U (en) * | 2011-01-19 | 2011-11-09 | 常州华冶恒基轧辊机械有限公司 | Cooling device applicable to double-frequency surface quenching unit |
| CN103521935B (en) * | 2013-09-29 | 2015-07-29 | 常州市瑞泰工程机械有限公司 | A kind of rail induction butt welding and heat treatment method |
| CN105014212B (en) * | 2015-07-23 | 2017-12-08 | 北京中铁科新材料技术有限公司 | Suspended rail flash butt welding heat-treating machine and suspended rail flash butt welding heat treatment method |
| CN206368184U (en) * | 2016-12-22 | 2017-08-01 | 上海工程技术大学 | A kind of rail welding head normalizing system |
| CN207811824U (en) * | 2017-10-20 | 2018-09-04 | 中国铁道科学研究院金属及化学研究所 | A kind of suspended rail flash butt welding intermediate frequency heat treatment mechanism |
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