CN101761002B - Steel rail welding joint heat treatment device and heater thereof - Google Patents
Steel rail welding joint heat treatment device and heater thereof Download PDFInfo
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- CN101761002B CN101761002B CN2009102428395A CN200910242839A CN101761002B CN 101761002 B CN101761002 B CN 101761002B CN 2009102428395 A CN2009102428395 A CN 2009102428395A CN 200910242839 A CN200910242839 A CN 200910242839A CN 101761002 B CN101761002 B CN 101761002B
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Abstract
The invention provides a heater for a steel rail welding joint heat treatment device, comprising a plurality of fire holes. The heater surrounds the steel rail welding joint and carries out the heat treatment for the steel rail welding joint by using the gas through the fire holes. The heater is made from the metal which has the thermal conductivity coefficient of not less than 350 W/m.k and the radiating surface area of not less than 240,000 mm2. The invention also discloses the steel rail welding joint heat treatment device which comprises a support structure, the heater and a sliding mechanism, wherein the support structure is fixedly arranged relative to a steel rail, the sliding mechanism is provided with a first end and a second end and is supported on the support structure to slide on the extension direction of the steel rail, and the heater is arranged on the sliding mechanism.
Description
Technical field
The present invention relates to be used for the device that heat-treat steel rail weld joint rail welding (for example flash welding, gas pressure welding, exothermic welding and narrow gap arc welding) back in railway or the urban track traffic industry, especially be suitable for use in the device of in the steel rail laying scene steel rail weld joint being heat-treated.The invention still further relates to the heater of this device.
Background technology
In railway or urban track traffic industry, be used for the gapless track construction thereby need weld to rail.In the prior art, the welding that is used for rail generally includes flash welding, gas pressure welding and exothermic welding etc.And to steel rail weld joint heat treatment can so that the mechanical property of welding point significantly improve.With flash welding and gas pressure welding is example, and joint is through heat treatment, and elongation rate and impact absorbing energy can improve 50%～100%, thereby increases substantially the application life of gapless track.For this reason, clearly must heat-treat after the welding of regulation flash welding and gas pressure welding among the railroad industry standard TB/T 1632.The special project test that joint made by alumino-thermal weldin is carried out shows that elongation rate and impact absorbing energy can improve 80%～100%.
From prior art, know a kind of to the steel rail weld joint heat-treating methods; Promptly adopt the Frequency Induction Heating mode that welding point is heat-treated; Its operating principle is: will seal, the hollow lead loop of water-cooled is enclosed within the welding point place of rail; Connect the midfrequent ac power supply then, alternating current produces alternating magnetic field and through ferromagnetism rail welding point, this magnetic field makes joint produce eddy current and makes its heating.Concrete equipment is made up of three parts: high-power intermediate frequency power supply, intermediate-frequency transformer and induction coil.Intermediate frequency power supply is that industrial-frequency alternating current is transformed into medium frequency alternating current, and it is elementary then the intermediate frequency electricity to be inserted intermediate-frequency transformer, and transformer secondary output inserts the sealing lead loop of passing rail.The sealing lead loop of passing rail after the power supply energising produces the magnetic field of the variation of intermediate frequency, and rail produces eddy current and gives birth to heat under the effect in the magnetic field that changes.Owing to need rail to pass the sealing lead loop, therefore can't use in the welding of rail on line, do not see the method yet and be applied to lay on-the-spot instance.In addition, the spacing on the vertical surface of induction coil and rail is very little, and required precision is higher, and therefore, in fact this method only is applicable to factory's welding of rail, is not suitable for the welding point of exothermic welding.
The existing steel rail weld joint heat treatment mode that can be used for the steel rail laying scene is to utilize the gas pressure welding of rail machine to carry out steel rail weld joint heat treatment.This type of gas pressure welder is all mentioned at Chinese patent 87202680,02113283.6,200610020237.1 and 200520035465.7; It is characterized in that utilizing after the gas pressure welding of rail machine welds rail, with the heater of gas pressure welder and use acetylene+oxygen to heat steel rail weld joint as heating source.In order to make the steel rail weld joint homogeneous heating, during heating, heater is placed on the piston rod that is parallel to rail.The swing mode of heater is divided into two kinds: a kind of is that one end hook is lived heater with the long fork of a 1.0～2.0m, and the other end makes heater swing (seeing Chinese patent 87202680) with artificial pulling fork; Another kind is the swinging structure with automatic control function, and promptly motor rotates and drives the swinging structure swing, and swinging structure drives heater swing (seeing Chinese patent 200520035465.7 for details) then.The heater of above-mentioned patent all meets TB/T 2622.1 " mobile steel rail gas pressure welder equipment press-connection machine technical condition " with the structure of corresponding annealing device (gas pressure welder).
Yet for the combustion gas tempering and the detonation that prevent overheated heater and cause thus, existing heater all has water-cooling structure.And the inventor does not find to have research and the improvement to the water-cooling structure that minimizes or eliminate heater as yet.Because the annealing device of above-mentioned patent and heater thereof also need can be used for rail joint is carried out gas pressure welding; Therefore need provide than the required higher temperature of temperature of postweld head treatment only; Event need to adopt fuel value higher but burning-point is low, the unsettled acetylene of character is as combustion gas, and this has increased the difficulty that minimizes or eliminate water-cooling structure.In addition, owing to existing annealing device comprises welding equipment and has water-cooling structure, so existing annealing device relatively heavier (the annealing device weight that for example, can put fire automatically is about 200kg).
Summary of the invention
The present invention relates to a kind of annealing device and heater thereof that is used for steel rail weld joint, annealing device wherein of the present invention and heater thereof need not water-cooling structure.
Therefore, a kind of heater that is used in the steel rail weld joint annealing device is provided.This rail comprises rail head, the web of the rail and the flange of rail.Heater comprises a plurality of fire holes.This heater is around this welding point and be configured to use combustion gas through these a plurality of fire holes this welding point to be heat-treated.Wherein, this heater is processed by the metal with the coefficient of thermal conductivity that is not less than 350W/ (mk), and this heater has the 240000mm of being not less than
2Cooling surface area.
Usually, heater is when work, and the temperature in the fire hole can not be higher than the burning-point of combustion gas.In case temperature is higher than the burning-point of combustion gas, cause combustion gas in heater inner (in the fire hole) burning probably, promptly cause tempering and detonation.For the control heater temperature rises, existing heater all adopts water-cooling structure.The inventor recognizes; Do not cause the tempering and the detonation of combustion gas for heater that anhydrous cold junction structure is provided and this heater temperature of its inside (in the fire hole) when the work; Need to improve the heat radiation of heater, specifically, improve the coefficient of thermal conductivity and the cooling surface area of heater.
Heater of the present invention has compared with prior art improved the heat conductivility of heater significantly; Wherein the heater of prior art often adopts basis brass to process, and the coefficient of thermal conductivity that manufactured materials had of existing heater has only about 150W/ (mk) usually.The metal that heater of the present invention adopts coefficient of thermal conductivity to be not less than 350W/ (mk) is generally processed.Being preferably the same alloy that coefficient of thermal conductivity is not less than 350W/ (mk) processes.Heater according to the present invention is compared with the heater of prior art, has increased the coefficient of thermal conductivity of the manufactured materials of heater significantly.
In addition, heater according to the present invention has the 240000mm of being not less than
2Cooling surface area.In this article, the cooling surface area of heater is meant that the heater remaining surface except that the position that fire hole is set is long-pending.The cooling surface area of typical existing heater is no more than 70000mm
2Compared with prior art, increased the cooling surface area of heater significantly according to heater of the present invention.
Just because of the improvement of on the manufactured materials of heater and cooling surface area, making according to the present invention; Thereby the invention provides a kind of heater that need not water-cooled body, reduced the weight of the annealing device and the heater thereof of steel rail weld joint significantly.According to experiment; The temperature of the heater that in the process that heater of the present invention uses combustion gas well known by persons skilled in the art (acetylene) that steel rail weld joint is heat-treated, records is not all the time above 260 ℃; Be significantly less than the burning-point of this combustion gas, therefore can not cause the tempering and the detonation of heater.And in control experiment; The inventor adopts existing steel rail weld joint annealing device (gas pressure welder) under the situation of the water-cooling structure of removing its heater, the welding point of rail to be heat-treated; Only in tens of seconds very of short duration time tempering having taken place promptly, can't accomplish the heat treatment to steel rail weld joint.
According to a further general feature of the present invention, thus for the possibility that reduces fuel gas return-flow reduces the possibility of tempering, said a plurality of fire holes have the degree of depth greater than 5mm.In addition, for can being provided, suitable ignition temperature avoid simultaneously overheated heater, said a plurality of fire holes preferably to have scope at 0.5 to 2.0mm diameter.
Preferably, a plurality of fire holes comprise 10-18 individual fire hole and 10-20 fire hole that is arranged to facing to the flange of rail that is arranged to facing to the web of the rail of fire hole, 20-30 that is arranged to facing to rail head.Such fire hole disposes and is heated when being beneficial to steel rail weld joint heat treatment evenly and the heat radiation that is beneficial to heater.
In addition; Because existing heater is in order to be used for the welding of heating-up temperature higher (for example more than 1250 ℃); Combustion gas has to adopt the higher acetylene of calorific value, thereby also must bear the shortcoming that acetylene has: burning-point low (306 ℃), character instability and tempering and detonation easily.According to heater of the present invention owing to only be used for welding point heat treatment; Therefore heating-up temperature can lower (below 1000 ℃), and said combustion gas can select for use calorific value lower but be enough to provide the heating-up temperature of wanting and have the incendiary material of higher burning-point (for example burning-point is not less than 400 ℃) simultaneously than acetylene.Particularly, said combustion gas comprises liquefied petroleum gas or propane.Perhaps, said combustion gas comprises liquefied petroleum gas and propane.In addition, said combustion gas can comprise natural gas.Mentioned in this article combustion gas is meant under the operating temperature and pressure environment of heater; Be rendered as gas form and incendivity and think that steel rail weld joint provides the material of heat, and do not get rid of the material that meets above-mentioned requirements but under specific environment, present other form.Especially, do not get rid of liquefied petroleum gas according to combustion gas of the present invention.
According to one preferred embodiment of the present invention, heater has the outer surface around said rail, and said a plurality of fire holes are arranged on this interior contoured surface.And should in the scope of spacing between the surface of contoured surface and this rail can be for greater than 25mm and be less than or equal to 50mm; Be preferably greater than and equal 28mm and smaller or equal to 35mm.Existing heater is in order to be used for the higher gas pressure welding of heating-up temperature, and spacing on contoured surface and rail surface is less relatively in it, and the protruding surplus aspect that therefore can put into steel rail weld joint can be very limited.By comparison; Because heater of the present invention only is used for the welding point heat treatment of postwelding; So required heating-up temperature is relatively low; Therefore the interior contoured surface of heater can be relatively large with the surperficial spacing of rail, thereby go for the polytype joint, especially applicable to the welding point of exothermic welding.
The present invention also provides a kind of annealing device that is used for steel rail weld joint, and it comprises the braced structures that fixedly installs with respect to said rail, according to heater of the present invention with have first end and the slide mechanism of second end.This slide mechanism is configured to by this support construction supports and can on the rail bearing of trend, slides.And this heater is installed on this slide mechanism.
According to annealing device of the present invention owing to have according to of the present invention and do not have the weight that reduces with the heater of water-cooling structure.Because annealing device of the present invention is to be exclusively used in welding point heat treatment, so thereby tape welding does not connect equipment and has the weight that further reduces.
Preferably, this annealing device also comprises centering body.This centering body comprise can be on transverse to the rail direction start in the level(l)ing mechanism of said second end with can be on vertical start in the vertical governor motion of this second end, and wherein said heater is installed on said first end.Can be according to centering body of the present invention through regulating the centering that two parameters (horizontal and numerical value) are realized heater.And, can satisfy the accuracy of alignment requirement that heater is heat-treated so that the accuracy of alignment of heater reaches ± 1mm according to centering body of the present invention.
According to a preferred embodiment of the present invention, said heater comprises two parts of opposite opened.And said slide mechanism comprise with these two parts be supported in respectively on the slide mechanism supporter with keep the keeper that these two parts each other can not relative motion.In this embodiment, annealing device can be applied in the steel rail laying scene at an easy rate, and the assembling of heater is simple and convenient.
In order to realize automatic pendulum fire, another preferred embodiment according to the present invention, annealing device according to the present invention comprise makes said slide mechanism actuator that slides and the controller of controlling said actuator.
Description of drawings
Below, specify embodiments of the invention in conjunction with accompanying drawing, wherein:
Fig. 1 shows an embodiment according to steel rail weld joint annealing device of the present invention;
Fig. 2 shows an embodiment according to the heater of annealing device of the present invention;
Fig. 3 is the welding point sketch map of exothermic welding rail;
Fig. 4 shows the location structure according to an embodiment of annealing device of the present invention;
Fig. 5 shows the centering body according to an embodiment of annealing device of the present invention;
Fig. 6 shows an embodiment according to annealing device of the present invention, has wherein shown the assembling of the heater of this annealing device.
Description of reference numerals
1 clamping knob; 2 fire holes; 3 guide rails; 4 heaters; 5 hooks; 6 air inlets; 7 supports; 8 rail head locating pieces; 9 rail; 10 flange of rail locating pieces; 11 horizontal buffer rails; 12 vertical adjusting knobs; 13 vertically anti-rotation; 14 rail head latch segments; 15 anti-rotation; 16 actuators; 17 fixed knobs; 18 slide rail end plates.
The specific embodiment
Existing totally with reference to figure 1, totally show the steel rail weld joint annealing device.This annealing device comprises heater 4, braced structures and slide mechanism (guide rail 3).In this embodiment, will detail like hereinafter, bracing or strutting arrangement is supported and fixed on the rail.Slide mechanism with first end and second end is supported on the braced structures, and can on the direction that rail extends, reciprocatingly slide.Heater 4 is installed on the slide mechanism, particularly on the end plate of first end of guide rail 3, thereby makes heater 4 round welding point.For the sake of clarity, in Fig. 1 and not shown complete welding point and rail by brachymemma, can heat-treat the long rail that extends equally but should understand device of the present invention.
Specifically with reference to figure 2, show the design of heater 4 now, this heater 4 uses combustion gas that steel rail weld joint is heated.As shown in Figure 2, heater 4 is the structure of rectangular block generally, and heater 4 has the cavity that is complementary with rail, and heater 4 has formed the interior contoured surface towards rail thus.In this, be furnished with a plurality of fire holes 2 on the contoured surface.Heater 4 also has the air inlet 6 that is used for delivery of fuel gas.Said fire hole 2 is communicated with through the passage (not shown) that is arranged in the heater 4 with air inlet 6.The layout of said a plurality of fire hole 2 on the interior contoured surface of heater will detail hereinafter.As shown in Figure 2, for the ease of carrying and the on-the-spot application of track laying, said heater 4 is opposite openeds, two parts about promptly comprising.These two parts can separate when dismantling and carrying each parts of annealing device, when assembling and using this annealing device, are maintained at together.
The marked improvement that heater 4 according to the present invention is compared with the prior art heater is to have cancelled water-cooling structure (promptly adopting air cooling).The inventor recognizes the key element of the manufactured materials of heater 4, overall structure, radiating mode, fire hole type selecting and these several aspects of combustion gas material is improved the marked improvement that can obtain to cancel water-cooling structure.Particularly, select the manufactured materials of coefficient of thermal conductivity within the specific limits; Increase the conduction of heat volume and the area of heater; Confirm fire hole 2 areas and layout according to the heat distribution characteristic of rail section; Be the tempering (detonation) that further helps to prevent heater 4, the degree of depth of fire hole 2 need meet certain requirements.In a preferred embodiment, heater 4 according to the present invention adopts coefficient of thermal conductivity to process greater than the copper alloy of 350W/ (mK).But it is understandable that and also can use the coefficient of thermal conductivity that can obtain other metal or alloy greater than 350W/ (mK).In addition, in a preferred embodiment, be not less than 240000mm according to the cooling surface area of heater 4 of the present invention
2According to inventor's test, when not having water-cooling structure, tempering and detonation have been avoided according to annealing device of the present invention (heater 4).
As shown in Figure 2, heater 4 of the present invention has and is arranged in its a plurality of fire holes 2 on the interior contoured surface of rail.Heater 4 according to the present invention comprises 10-18 the fire hole facing to the rail head of rail 9,20-30 fire hole and 10-20 the fire hole facing to the flange of rail facing to the web of the rail.In an illustrated embodiment, fire hole 2 is rounded and have a diameter in the 0.5-2.0mm scope.What can expect is that fire hole also can have other suitable shapes, and preferably has 0.625 π-1 π mm
2Areal extent.In addition, the degree of depth increasing with observation port can reduce the possibility that burning gases reflux, thereby has reduced the possibility of tempering.Preferably, the degree of depth of fire hole 2 is greater than 5mm.According to the preferred version shown in Fig. 2, fire hole 2 is not equally distributed, for example arranges closelyr at rail head and the web of the rail and the web of the rail and flange of rail junction, must be more sparse in other area arrangements.Certainly, also can otherwise arrange as required, or even evenly distribute.Fire hole size, structure and the layout of existing heater just considered the heat that need provide enough usually; And reckon without its influence to heater heat radiation; Fire hole size, structure and layout according to heater of the present invention can obtain improved heater heat radiation, and can more uniform heating (heat treatment) be provided for steel rail weld joint.
As stated, heater 4 feeds combustion gas with the heat welded joint through air inlet 6.Heater well known in the prior art adopts acetylene to heat as the welding point of combustion gas to rail usually.Heater 4 according to the present invention can adopt liquefied petroleum gas or propane as combustion gas.Existing heater welds owing to being used on the gas pressure welder, and welds desired temperature higher (such as more than 1250 ℃), needs to adopt the high acetylene of fuel value.But because acetylene burning-point lower (about 306 ℃) therefore causes tempering and detonation especially easily.And heater of the present invention just is used for the heat treatment of welding point, only need be no more than 1000 ℃ heating-up temperature (such as about 900 ℃).Thereby can adopt fuel value lower than acetylene but liquefied petroleum gas or propane that burning-point is higher (for example more than 450 ℃) are being enough to welding point effectively to promote the ability that heater of the present invention prevents tempering and detonation under the heat treated situation.Can expect, also can adopt any other suitable combustion gas, for example have greater than about 900 ℃ ignition temperature and burning-point greater than 400 ℃.
As stated; Heater in existing annealing device (for example gas pressure welder) welds to carry out air pressure for higher relatively temperature (for example more than 1250 ℃) is provided; Spacing in it between contoured surface and the rail surface is less usually, so that the better heating performance to be provided.The said spacing of this paper is meant, in two discontiguous objects, on object apart from another object nearest a bit in the beeline of this another object.Therefore, the spacing on the interior contoured surface of heater and rail surface is meant beeline that a bit arrives this rail surface nearest apart from the rail surface on the interior contoured surface of heater.But, it will be appreciated by one of skill in the art that each point on the interior contoured surface of heater about equally apart from the beeline (spacing) on rail surface, promptly the interior contoured surface of heater has the shapes similar with the rail surface configuration.For example, be example with the existing annealing device (gas pressure welder) of the welding point that is used for the 75kg/m rail, the interior contoured surface of heater and the spacing between the rail surface are generally about 20mm, 25mm at the most.Therefore when rail be when welding with exothermic welding; The web of the rail and flange of rail place at steel rail weld joint can have under the situation of the outstanding weldering muscle A (as shown in Figure 3) in rail surface; Spacing between the interior contoured surface of heater and the weldering muscle is merely about 11-12mm usually; Even under extreme case, can under this distance, can't realize the exothermic welding welding point is heat-treated less than 10mm.In addition, because the interior contoured surface of existing heater and the interval between the rail surface are merely about 20mm, so the heat radiation of heater received very big influence, has to rely on water-cooled body and carries out water-cooled.
With it relatively, heater of the present invention 4 not be owing to need provide so high heating-up temperature, thus heater 4 can have between interior contoured surface and the rail surface than spacing greatly.In according to one embodiment of the invention, according to the interior contoured surface of heater 4 of the present invention and the spacing between the rail surface for greater than 25mm and be less than or equal to 50mm.In accordance with a preferred embodiment of the present invention, the interior contoured surface of heater 4 and the spacing between the rail surface are in the scope of 28mm-35mm.Therefore, when being used for the exothermic welding welding point, the interior contoured surface of heater and the spacing of weldering between the muscle usually still can be greater than 15mm according to heater of the present invention (annealing device), thereby can realize ability that the exothermic welding welding point is heat-treated.Therefore, heater of the present invention and annealing device can be used for multiple occasion, in particular for laying the on-the-spot exothermic welding welding point that is widely used.
Refer now to Fig. 1, Fig. 2 and Fig. 6, show on first end that heater 4 is installed in guide rail 3.As stated, heater 4 is opposite openeds, promptly has two parts.Therefore, in use need be combined into an integral body to these two parts to be installed on first end of guide rail 3 round rail 9.Therefore on first end of guide rail 3, the mounting structure that is used to install heater 4 is housed.Mounting structure comprises that two parts that are used for heater are supported on supporter and the keeper that is used for these two parts are held in one (promptly can not move each other) on first end respectively.As shown in Figure 6, a pair of hook (supporter) 5 is housed on the end plate on first end of guide rail 3, hang above that to be used for heater 4.Accordingly, heater 4 partly has corresponding square hole above that.In addition, near the width range of end plate upper heater 4, be provided with clamping knob (keeper) 1, so that this opposite opened heater is installed on first end of guide rail 3 with form fix in aggregates.Can find out that this clamping knob 1 also plays the effect of fixed heater 4.Can expect adopting other suitable mounting structure, for example, use a pair of clamping knob that is located at hook 5 positions, it can be bearing in said heater 4 on first end of guide rail 3 and it can be fastening in aggregates with this opposite opened heater 4 when tightening.
With reference to figure 1,4 and 5, specifically describe the braced structures of annealing device mentioned above at present.Braced structures of the present invention comprises rail head locating piece 8, flange of rail locating piece 10 and support 7.In Fig. 4, rail head locating piece 8 is just clamped rail head of rail, and rail head locating piece 8 is installed on the support 7 with being threaded.Flange of rail locating piece 10 is clamped the flange of rail, and flange of rail locating piece 10 is installed on the support 7 with being threaded.Thereby the location of machine is accomplished in both sides.In the present embodiment rail head locating piece 8 and flange of rail locating piece 10 only clamping be positioned on the rail 9 supporting this annealing device, but they are not to be fastened on the centering that is beneficial to heater 4 on the rail fully to regulate.According to the difference of rail model, can select different rail type rail head locating piece 8 and flange of rail locating piece 10 for use, therefore there is special benefit this versatility aspect that is configured in according to the present invention.In addition, as shown in Figure 5, braced structures of the present invention also comprises rail head clamping block 14.This rail head latch segment 14 comprises locking knob 17.Rail head latch segment 14 has groove down, and the size of this groove is bigger than the size of rail head.In use, the rail head of rail 9 is stretched in this groove, and locking knob 17 is screwed with 14 lockings of this latch segment, and this latch segment 14 is installed to again on the support 7, thereby realized the support location of device of the present invention on rail.Preferably, rail head latch segment 14 also comprises anti-rotation 15, and it is used for when rotary knob 17, preventing the undesired rotation of latch segment 14 or rocking.Support 7 has barrel, and its diameter of this barrel is equal to or slightly greater than guide rail 3.And guide rail 3 is placed in this barrel, and can slide along the longitudinal axis of this barrel, thereby guide rail 3 is supported on the braced structures.
For welding point is carried out better heat treatment, annealing device can also comprise the position that is used to regulate heater so that it is suitably around the welding point centering body of (for example being used to make that the inboard every bit of heater place is consistent basically with beeline between the welding point).
As shown in Figure 5, centering body of the present invention comprises the horizontal buffer rail 11 and vertical adjusting knob 12 that is associated with second end of guide rail 3.In the present embodiment, horizontal buffer rail 11 is fixedly linked with support 7, and can laterally be located at slidably in the corresponding groove on the rail head latch segment 14.When horizontal centring was regulated, the operator laterally promoted horizontal buffer rail 11, thereby support 7 is being followed this buffer rail 11 and laterally moved.Be installed in because of guide rail 3 in the barrel of support 7, thereby laterally moving of support 7 makes second end of guide rail 3 laterally move.Thus, guide rail 3 is a fulcrum with near rail head locating piece 8 and/or the flange of rail locating piece 10 that is positioned at the center, under leverage, makes the heater that is positioned on first end laterally move towards rightabout, and then has realized that the horizontal centring of heater 4 regulates.
As shown in Figure 5, vertically knob 12 abuts against the projecting block on the support 7, and this projecting block is contained in the vertically anti-spin-block 13.When carrying out vertical centering when regulating, it is downward to screw vertical knob 12, thereby the projecting block that knob 12 acts on the support moves downward it.Perhaps screw vertical knob 12 upwards, thereby the projecting block on the support 7 moves upward under leverage until against vertical knob.Because on first end of guide rail 3, heater 4 is housed, thereby first end of guide rail 3 significantly overweights second end.Therefore when knob 12 makes progress; Second end has lost equilibrant force; Weight on first end can be that fulcrum makes the part of second end and support 7 contiguous these second ends move upward with rail head locating piece 8; Simultaneously first end and heater correspondingly move downward under the effect of weight, until the projecting block of support 7 once more against knob 12 (i.e. first and second ends dynamic balance) once more.Preferably, the vertically anti-spin-block 13 of installing, thus screwing vertical knob 12 when making its in the vertical direction centering with vertical adjusting heater, vertically anti-spin-block 13 has prevented that the protuberance of support 7 carries the result that the wobble effects level on the horizontal direction is regulated.
Though this manual is mentioned horizontal centring earlier and regulated, and does not mean that the restriction to centering regulating step of the present invention, for example also can carry out carrying out horizontal centring after vertical centering is regulated earlier and regulate.As shown in Figure 5, rail head latch segment 14 has two clamp nuts, and it is used for after centering is regulated, support 7 being fastened on rail head latch segment 14.
In the illustrated embodiment, the centering governor motion be through start be adjacent in support 7 guide rail 3 second end part and indirectly start in second end of guide rail 3.Yet and the mode start directly or indirectly that can adopt other is in second end of guide rail 3, so long as be fulcrum with rail head locating piece 8 and/or flange of rail locating piece 10, makes heater 4 realization levels, vertical adjusting according to lever principle.According to centering body of the present invention and method, avoided the centralising device and the method for complicacy in the prior art, only need adjust level and vertical two parameters simply and can realize the centering adjusting.Through overtesting, centering body of the present invention can be realized the centering adjusting of 1mm precision.
In addition, this annealing device also comprises actuator 16 and controller (not shown).Actuator 16 is connected on the slide rail end plate 18 of second end of guide rail 3, thereby and drives the heater pendulum fire that is contained on first end through driving guide rail.Actuator and controller have realized that the automatic pendulum of heater 4 is fought and the direction of motion, speed and the time of heater 4 can be set as required; For example; (50kg/m, 60kg/m or 75kg/m etc.) make heater move back and forth on the rail direction with specific speed and specific time according to the rail model, perhaps according to rail welding method (flash welding, gas pressure welding, exothermic welding or narrow gap arc welding etc.) heater are moved back and forth on the rail direction with specific speed and specific time.Can programme to the control procedures such as traffic direction, speed and time of actuator 16 with programmer as required, controller is imported and/or be pre-programmed into to control instruction, accomplish the pendulum fire by controller control driver 16 and move.In the present embodiment, actuator 16 is preferably linear electric motors.
In conjunction with above embodiment, the method for operating of the embodiment of annealing device of the present invention is described.
At first, select the rail head locating piece 8 of appropriate size to be installed on the support 7, and guide rail 3 is inserted in the barrel of support 7 with flange of rail locating piece 10.Wherein, rail head latch segment 14 has been connected on the support 7.This support 7 is put into the appropriate position on the rail 9 then; Be that rail head locating piece 8 is placed on the rail 9 with flange of rail locating piece 10 and rail head latch segment, so that first end of guide rail 3 is positioned at steel rail welding line (even the heater of installing after getting 4 can be centrally located on the position of steel rail welding line).Tighten fixed knob 17, promptly accomplished braced structures fixing on rail.After braced structures is fixing, carries out heater 4 and install.Heater 4 is installed to be comprised: 1) heater 4 is merged from the both sides of rail 9 and hang on the square hook 5 of first end of guide rail 3, make that heater is supported lives; 2) thus the clamping knob 1 of screwing is fixedly clamped heater 4.After accomplishing heater 4 fixing; Again heater 4 being carried out centering regulates; Comprise 1) the vertical adjusting knob 12 of rotative heater, the part that makes rail brackets 7 be adjacent to second end of guide rail 3 moves down and then makes this second end move down, and causes thus moving on the heater; Vice versa, thereby realize the adjusting of heater vertical direction; 2) moving horizontally heater horizontal adjusting rail 11 moves its along continuous straight runs in the groove of rail head clamping block 14; And then make second end of guide rail 3 move horizontally; Thereby make the heater that is positioned on first end oppositely move the upper edge in the horizontal direction, thereby the horizontal centring that realizes heater is regulated.What can expect is, also can carry out horizontal centring earlier and regulate, and carries out vertical centering again and regulates.Heater centering can be heat-treated step after regulating and accomplishing.Feed combustion gas, behind open firing point combustion gas body, open electric switch again actuator 16 is activated according to predefined program, heater 4 is according to the swing speed and the displacement action of procedure stipulation.After accomplishing heat treatment step, close burnt gas valve and actuator switch.Unscrew clamping knob 1 then, and opposite opened heater 4 is taken off from linking up with 5, thereby remove heater 4.After removing heater 4, unscrew fixed knob 17, can support 7 be taken off from rail.Can take off guide rail 3 and rail head locating piece 8 and flange of rail locating piece 10 then.
In the present invention; This annealing device and heater thereof are owing to structurally cancelled water-cooling structure; Thereby the weight that greatly reduces annealing device (for example; The gross weight of annealing device is controlled at below the 35kg (not comprising fuel gas source)), thus this annealing device has significantly improved portability.
Result of the test according to using annealing device of the present invention that the on-the-spot steel rail weld joint of steel rail laying is heat-treated shows that the elongation rate of steel rail weld joint and impact absorbing energy can improve 55%～100%, and its plasticity and toughness increase substantially.
The present invention also has the characteristics of easy replacement and exchange.In addition, the present invention can also provide a kind of heat treatment outfit that is suitable for the welding point of multiple rail type.The parts of this outfit are substantially similar to above-described parts, and difference is that this a complete set of equipment comprises rail head locating piece, flange of rail locating piece and the heater that is applicable to various rail types (50kg/m, 60kg/m or 75kg/m etc.) respectively.
Claims (9)
1. annealing device that is used for steel rail weld joint, this rail comprises rail head, the web of the rail and the flange of rail, this device comprises:
The braced structures that fixedly installs with respect to said rail;
Heater; This heater comprises a plurality of fire holes; This heater centers on this welding point and is configured to this welding point heat-treated with combustion gas through said a plurality of fire holes; It is characterized in that this heater is processed by the metal with the coefficient of thermal conductivity that is not less than 350W/ (mk), and this heater has the 240000mm of being not less than
2Cooling surface area; With
Slide mechanism with first end and second end, it is configured to by this support construction supports and can on the rail bearing of trend, slides, and wherein this heater is installed on this slide mechanism.
2. annealing device according to claim 1 is characterized in that this heater is processed by copper alloy.
3. annealing device according to claim 1 is characterized in that, said a plurality of fire holes have the degree of depth greater than 5mm.
4. annealing device according to claim 1 is characterized in that, said a plurality of fire holes have the diameter of scope at 0.5mm to 2.0mm.
5. according to each described annealing device in the claim 1 to 4; It is characterized in that said a plurality of fire holes comprise 10-18 individual fire hole and 10-20 fire hole that is arranged to facing to this flange of rail that is arranged to facing to this web of the rail of fire hole, 20-30 that is arranged to facing to this rail head.
6. annealing device according to claim 1 is characterized in that said combustion gas comprises liquefied petroleum gas or propane.
7. annealing device according to claim 1; It is characterized in that; Said device comprises centering body; This centering body comprise can be along the horizontal start of rail bearing of trend in said second end level(l)ing mechanism with can start be in the vertical governor motion of said second end on vertical, wherein said heater is installed on said first end.
8. annealing device according to claim 1; It is characterized in that; This heater is made up of two parts of opposite opened, said slide mechanism comprise with these two parts be supported in respectively on this slide mechanism supporter with keep the keeper that said two parts each other can not relative motion.
9. annealing device according to claim 1 is characterized in that, also comprises being used to make said slide mechanism actuator that slides and the controller of controlling said actuator.
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| CN2009102428395A CN101761002B (en) | 2009-12-17 | 2009-12-17 | Steel rail welding joint heat treatment device and heater thereof |
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| CN2009102428395A CN101761002B (en) | 2009-12-17 | 2009-12-17 | Steel rail welding joint heat treatment device and heater thereof |
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| CN101761002A CN101761002A (en) | 2010-06-30 |
| CN101761002B true CN101761002B (en) | 2012-06-27 |
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102409585B (en) * | 2011-08-16 | 2015-04-22 | 中铁二十二局集团第二工程有限公司 | Cooler for cooling on-site welded joint of long steel rail and using method for cooler |
| CN102505589B (en) * | 2011-11-02 | 2015-01-07 | 中铁上海工程局集团有限公司 | Portable rail welding joint medium-to-high-frequency electric induction heating normalizing device and method |
| CN104695294A (en) * | 2015-02-04 | 2015-06-10 | 北京中铁科新材料技术有限公司 | Method for adjusting straightness of on-line steel rail welding joint |
| 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 |
| CN105625119B (en) * | 2015-12-18 | 2018-04-20 | 常州阳通焊接科技有限公司 | The induction coil quick centring mechanism of steel rail weld joint normalized treatment |
| CN106319183A (en) * | 2016-07-28 | 2017-01-11 | 浙江建鑫型钢科技有限公司 | Test tool for guide rail heat treatment |
| CN106835867A (en) * | 2017-04-18 | 2017-06-13 | 山东德龙电子科技有限公司 | Railroad track insulating joint scene fast assembling-disassembling technique and corollary apparatus |
| CN110656230B (en) * | 2019-11-05 | 2024-01-19 | 中国铁建重工集团股份有限公司道岔分公司 | Heating device and rod piece heating method |
| CN110643803B (en) * | 2019-11-05 | 2023-10-27 | 中国铁建重工集团股份有限公司道岔分公司 | Heating device and rod piece heating method |
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| US4556164A (en) * | 1982-12-07 | 1985-12-03 | Japanese National Railways | Method of field welding head-hardened rails |
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