CN102168698A - Valve plug of height adjustment reversing valve and girth welding process thereof for height adjustment system of coal mining machine - Google Patents
Valve plug of height adjustment reversing valve and girth welding process thereof for height adjustment system of coal mining machine Download PDFInfo
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- CN102168698A CN102168698A CN2011100981831A CN201110098183A CN102168698A CN 102168698 A CN102168698 A CN 102168698A CN 2011100981831 A CN2011100981831 A CN 2011100981831A CN 201110098183 A CN201110098183 A CN 201110098183A CN 102168698 A CN102168698 A CN 102168698A
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Abstract
The invention discloses a valve plug of a height adjustment reversing valve and a girth welding process thereof for a height adjustment system of a coal mining machine. The valve plug comprises a valve plug body, a left plug head and a right plug head; the left plug head and the right plug head are respectively provided with a left annular boss and a right annular boss the outer diameter of which are the same with the outer diameter of the valve plug body; and the left annular boss and the valve plug body as well as the right annular boss and the valve plug body are respectively fastened and connected through a circular ring-shaped soldering joint which is arranged along the valve plug body radially. The girth welding process comprises the following steps: 1. groove treatment; 2. preheating before welding; 3. girth welding; and 4. heat preservation after welding. The valve plug and the process provided by the invention have the advantages of reasonable design, simple welding steps, good welding quality and long service life of valve plug manufacturing, are convenient to operate, and multiple actual problems of small operation space, smaller effective welding cross section area, lower strength, poor welding quality and higher rejection rate, is inconvenient to operate, the welding quality of the valve plug is not easy to control and the like in welding for the existing valve plug can be solved effectively.
Description
Technical field
The invention belongs to the coal winning machine height-adjusting system with heighten valve group manufacturing technical field, especially relate to a kind of coal winning machine height-adjusting system with heightening change-over valve core and boxing technology thereof.
Background technique
The coal winning machine height-adjusting system is that nowadays the coal winning machine height-adjusting system adopts hydraulic system mostly, is referred to as the coal winning machine height-regulating hydraulic system usually for heightening of realization coal mining machine roller needs be provided with.In the actual using process, coal-mining machine hydraulic system mainly comprise gear pump, for gear pump provide power motor, adjust high cylinder and hydraulic control valve thereof (being hydraulic lock etc.), heighten selector valve, high-pressure overflow valve (safety valve), low pressure relief valve, braking electromagnetic valve group, pressure gauge and fuel tank, hydraulic pipe line etc.Wherein, heighten except adjust high cylinder, all the other all hydraulic components all are installed on to be heightened in the pump box.Heighten pump box and be parts independently, main body is welded fuel tank and motor case, and the plane is provided with a drawer plate on casing, and all hydraulic component and pipeline are all fixing and connect on this drawer plate.Independently heighten the pump box parts in old man's side is packed the framework of tractive unit right-hand member into.During actual the use, inject antiwear hydraulic oil in heightening the pump box hydraulic oil container, be provided with two oily windows in old man's side of pump box, an oily window of below is the minimum oil level of fuel tank, and during the coal winning machine proper functioning, pasta is required should the oil window position, as less than replenishing.The positive top of left box body is provided with priming valve, and there is drain oil the below, and the plane is provided with air-strainer (air hole) on casing, also this filter cleaner can be pulled down, and refuels from this.
During actual the use, the working principle of coal winning machine height-regulating hydraulic system is: turned round by the motor drive gear pump, gear pump by the oil suction oil purifier from the fuel tank oil suction, heightening selector valve not under the serviceability, the gear pump oil extraction is heightened selector valve and low pressure relief valve oil return pond through two, and this moment, the high and low pressure table showed that pressure is 2Mpa.When heightening the selector valve operation for one, during an i.e. operation left side or right cylinder lifting, the gear pump oil extraction enters adjust high cylinder through heightening selector valve, the fluid of adjust high cylinder oil-discharging cavity is heightened selector valve and low pressure relief valve oil return pond through another, is till cylinder is adjusted to the right place up to heightening the selector valve shut-down operation.Gear pump oil extraction oil circuit is provided with safety valve and the pressure gauge that prevents gear pump and system pressure overload, is provided with low-pressure meter at the front end of low pressure relief valve.Adjust high cylinder is provided with hydraulic lock and fixes on needed height and position to guarantee tumbler lock, also is provided with safety valve in addition on oil cylinder, is subjected to the excessive mechanical deterioration accident that causes of external force to prevent cutting mechanism, oil cylinder.Attention: heightening selector valve for two should operate separately, i.e. two cylinder liftings simultaneously.Low pressure relief valve of serial connection on the working connection of coal winning machine height-regulating hydraulic system, the set pressure of this valve is 2Mpa, like this, no matter whether carry out the operation of heightening of cylinder, as long as heighten the gear pump running, remain the constant pressure of 2Mpa at the front end of this valve, this pressure oil-source is used to heighten the control oil sources of selector valve group electro-hydraulic control valve and the control oil sources of left and right sides tractive unit hydraulic brake.
Heightening selector valve (also claiming the heighten valve group) is the control unit that the rocking arm cylinder is heightened, and it is made up of H type 3-position 4-way hand, pilot operated directional control valve and 3-position 4-way flame proof solenoid directional control valve, can electric control operation, but also manually-operable.Above-mentioned H type 3-position 4-way hand, pilot operated directional control valve comprise valve body and are installed in the interior spool of valve body that spool moves around at valve inner under driving mechanism drives.During actual the use, the working principle of heightening selector valve is: electromagnet is charged when a solenoid valve left side, control fluid promotes hand, liquid controlled reversing valve events (specifically being the spool action that promotes H type 3-position 4-way hand, pilot operated directional control valve) by solenoid valve, heighten pressure oil and lead to the A mouth by the P mouth and enter the adjust high cylinder pressure chamber, the oil return of oil cylinder then by the B mouth through receive and distribute, pilot operated directional control valve to 0 mouthful oil return pond; When right electromagnet charged, control fluid promotes hand, liquid controlled reversing valve events (specifically being the spool action that promotes H type 3-position 4-way hand, pilot operated directional control valve) by solenoid valve, heighten pressure oil and then lead to the B mouth and enter another chamber of adjust high cylinder by the P mouth, the oil cylinder oil return then by the A mouth through receive and distribute, pilot operated directional control valve oil return pond.Under manual case, because the y-function of solenoid valve, hand, pilot operated directional control valve two liquid controling cavities communicate with oil sump.
In conjunction with Fig. 1, the spool of currently used H type 3-position 4-way hand, pilot operated directional control valve mainly comprises valve core 1 and two left core print 2 and right core prints 3 that are installed in two end part, valve core 1 left and right sides respectively, described valve core 1 is the inner hollow cylindrical tube that is, left side core print 2 and right core print 3 are the filled circles mast, left side core print 2 and right core print 3 plug-in mounting are respectively gone into inboard, two ends, valve core 1 left and right sides, valve core 1 is 35CrMo with left core print 2 and right core print 3 material therefors, and is fastenedly connected by welding manner between valve core 1 and left core print 2 and the right core print 3.The inboard correspondence of the left and right end portions of described valve core 1 is provided with the cylindric plug-in mounting mouth for left core print 2 and 3 installations of right core print, the bore of described cylindric plug-in mounting mouth is greater than the internal diameter of valve core 1, corresponding structure and the consistent plug-in mounting termination of described cylindric plug-in mounting mouth of being coaxially arranged with on a left side core print 2 and the right core print 3, the external diameter of described plug-in mounting termination is identical with the bore of described cylindric plug-in mounting mouth and the two horizontal width is identical, and the external diameter of described plug-in mounting termination is greater than the diameter of left core print 2 and right core print 3.Square weld seam 4 between described left core print 2 and right core print 3 and the valve core 1 is the square weld seam between described cylindric plug-in mounting mouth and plug-in mounting termination.Described left core print 2 and right core print 3 all are coaxial laying with valve core 1, and left core print 2 is consistent with the external diameter of right core print 3.
As seen from Figure 1, square weld seam 4 between left side core print 2 and right core print 3 and the valve core 1 is along the axial design of valve core 1, have following practical problem during actual the use: the operating space is little in the welding process on the one hand, welding gun revolution etc. is restricted, and phenomenons such as rosin joint, lack of fusion appear in weld seam easily; On the other hand because distance between the toes of a weld only has 2mm, and net sectional area itself is less, and its square opening root of weld can not be soldered to during welding operation, has reduced the net sectional area of weld seam, and the intensity of weld seam also can be given a discount.Thereby, operating difficulties when said structure causes welding, very high to operator's level and welding condition requirement, uncontrollable factor is more, and welding quality can not be effectively controlled simultaneously, and reject rate is higher.To sum up, the existing change-over valve core of heightening is owing to being subjected to structural limitations, and weld seam is narrow and little, adopts the gas welding mode on the welding procedure, welds as packing material with copper.In the actual using process, weld seam sealing-off phenomenon repeatedly occurs, have a strong impact on quality of product.The reason of sealing-off mainly is that size of weld is little, and the wlding amount of fusing into is few, and the combination force that causes weld seam to produce is not enough.
Summary of the invention
Technical problem to be solved by this invention is at above-mentioned deficiency of the prior art, provide a kind of simple in structure, reasonable in design, processing and fabricating is easy and using effect good, the reliable coal winning machine height-adjusting system of steady quality is with heightening change-over valve core.
For solving the problems of the technologies described above, the technical solution used in the present invention is: a kind of coal winning machine height-adjusting system is with heightening change-over valve core, comprise valve core and two left core print and right core prints that are installed in two end part, the valve core left and right sides respectively, described valve core is a hollow, cylindrical tube, left side core print and right core print is the filled circles mast and the two is coaxial laying with valve core, valve core and left core print and right core print all adopt the 35CrMo material to make; Left side core print and right core print plug-in mounting are respectively gone into the inboard, two ends, the left and right sides of valve core, the inboard correspondence of the left and right end portions of described valve core is respectively arranged with the cylindric plug-in mounting mouth for left core print and the installation of right core print, the bore of described cylindric plug-in mounting mouth is greater than the internal diameter of valve core, the equal correspondence of inner termination of left side core print and right core print is set to and the identical insertion head of described cylindric plug-in mounting mouth structure, the bore of the external diameter of described insertion head and described cylindric plug-in mounting mouth is identical and the two horizontal width is identical, it is characterized in that: the insertion head arranged outside of described left core print has left annular boss, the insertion head arranged outside of right core print has right annular boss, the external diameter of described left annular boss and the right annular boss all external diameter with valve core is identical, left side annular boss and right annular boss all adopt the 35CrMo material to make, and left annular boss and left core print processing and fabricating are one, and right annular boss and right core print processing and fabricating are one; The outer side wall of described left annular boss and right annular boss closely contacts with the left and right sides end face of valve core respectively, described left annular boss carries out the fixedly connected and corresponding ring soldered one that forms by welding manner between the two between valve core, described right annular boss carries out the fixedly connected and corresponding ring soldered two that forms by welding manner between the two between valve core, described ring soldered one and ring soldered two along valve core radially lay and the cross section of the two is the V font.
Above-mentioned coal winning machine height-adjusting system is characterized in that with heightening change-over valve core: identical and the two the diameter of the diameter of described left core print and right core print is Φ 10mm ± 0.2mm, and the external diameter of valve core is 18mm ± 0.3mm; The structure of described ring soldered one and ring soldered two is all identical with size, and the horizontal width of described ring soldered one and ring soldered two is 3mm～5mm and the vertical degree of depth of the two is 3mm～5mm.
Simultaneously, the invention also discloses that a kind of welding step is simple, easy to operate, welding quality is easily controlled and coal winning machine height-adjusting system that welding quality height, reject rate are low with the boxing technology of heightening change-over valve core, it is characterized in that this technology may further comprise the steps:
Step 1, groove are handled: with between left annular boss and the valve core and the face of weld between right annular boss and the valve core through machining processes forming V-shape groove, the groove angle of described single V groove is 45 °～60 °, and described single V groove is for along the circumferential direction to be laid between left annular boss and the valve core or the annular groove between right annular boss and the valve core;
Step 2, weld preheating: adopt cutting torch that between left annular boss and the valve core and the welding part between right annular boss and the valve core is heated, and adopt temperature measuring equipment that the surface temperature of welding part is detected in real time in the heating process, until welding part and peripheral 20mm scope internal surface temperature thereof are heated to till 300 ℃～350 ℃;
Step 3, boxing: adopt welding equipment and according to conventional welding method, connecting port between connecting port between left annular boss and the valve core and right annular boss and the valve core is welded, and corresponding formation ring soldered one and ring soldered two, the spool body that then obtains to be welded as a whole and form by valve core, left core print and right core print;
Step 4, postweld heat preservation: the described spool body integral body that obtains after welding finishes in the step 3 is embedded in the unslaked lime and is incubated, till described spool body is cooled to room temperature.
Above-mentioned coal winning machine height-adjusting system is characterized in that with heightening change-over valve core boxing technology: the welding equipment described in the step 3 is the argon tungsten-arc welding welding machine.
Above-mentioned coal winning machine height-adjusting system is characterized in that with heightening change-over valve core boxing technology: when welding in the step 3, weld under inert gas shielding, and to weld used welding wire be TIG-J50 welding wire or ER50-6 welding wire.
Above-mentioned coal winning machine height-adjusting system is characterized in that with heightening change-over valve core boxing technology: when welding in the step 3, welding current is 180A～220A, and weldingvoltage is 15V～20V, and the gas flow of inert gas is 15L/min～20L/min.
Above-mentioned coal winning machine height-adjusting system is characterized in that with heightening change-over valve core boxing technology: described argon tungsten-arc welding welding machine is a Nebula400 digitizing inverter type welder.
Above-mentioned coal winning machine height-adjusting system is characterized in that with heightening change-over valve core boxing technology: the cutting torch described in the step 2 is oxygen-acetylene cutting torch.
Above-mentioned coal winning machine height-adjusting system is characterized in that with heightening change-over valve core boxing technology: described oxygen-acetylene cutting torch is an injector cutting torch.
Above-mentioned coal winning machine height-adjusting system is characterized in that with heightening change-over valve core boxing technology: when carrying out weld preheating in the step 2, and the preheat flame of the neutral flame that adopts described cutting torch when heating.
The present invention compared with prior art has the following advantages:
1, simple in structure and reasonable in design, need not the existing change-over valve core structure of heightening is done bigger change, processing and fabricating is convenient and input cost is lower.
2, quality of product height, formed ring size of weld is wide and big, and the wlding amount of fusing into is many, and the weld seam combination force is stronger, in the actual using process of spool, weld seam sealing-off phenomenon seldom occurs.
3, the welding procedure step is simple and easy to operate, because original square weld seam of axially laying along valve core is adjusted into the circular weld of radially laying along valve core, thereby the operating space of welding is unrestricted, flexible operation, welding gun revolutions etc. are unrestricted, lower to operator's level and welding condition requirement, uncontrollable factor is less.
4, welding quality is good, because the operating space is unrestricted and adopt V font weld seam wide outside and narrow inside, not only groove is handled conveniently, and the root of weld can fully be touched and effectively weld, thereby weld formed weld seam and be not prone to phenomenons such as rosin joint, lack of fusion, it is firm to weld; Simultaneously, the net sectional area of the ring weld seam that forms is bigger, and weld strength is higher.
5, welding quality control is easy, and reject rate is lower.
6, the using effect of made spool is good, radially lays owing to weld seam is adjusted into along valve core, and is spatially unrestricted when making welding on the one hand, makes things convenient for welding operation, can guarantee the thorough through welding of weld seam, prevents that defective from producing, the assurance weldquality; The corresponding increase of the net sectional area of weld seam on the other hand can improve the bulk strength of spool.To be changed into present argon tungsten-arc welding by original brazing, and adopt 50 feather weight welding wires as packing material, the worker is preheated to 300 ℃ before the weldering, postwelding is incubated rapidly, thereby weld defectss such as pore, undercut do not occur, can guarantee weld strength, reduce welding heat, prevent that workpiece is breakdown.
7, significantly prolong the working life of spool, the original structure spool uses that 1-2 will come off after the month, phenomenon of rupture, and spool of the present invention service time is the 4-5 month, and be doubled many working life, reduced after cost significantly.
In sum, the present invention is reasonable in design, welding step is simple, easy to operate and welding quality good, the long service life of the spool that machines, little, the operation inconvenience in operating space in the time of effectively solving the welding that existing spool exists, the weld seam net sectional area is less and intensity is lower, welding quality is wayward, welding quality is relatively poor, the more high multiple practical problem of reject rate.
Below by drawings and Examples, technological scheme of the present invention is described in further detail.
Description of drawings
Fig. 1 is the existing coal winning machine height-adjusting system structural representation of heightening change-over valve core.
Fig. 2 adopts the structural representation of heightening change-over valve core for the present invention.
Boxing process flow diagram when Fig. 3 welds heightening change-over valve core for the present invention.
Description of reference numerals:
The 1-valve core; 2-left side core print; The right core print of 3-;
The square weld seam of 4-; 5-left side annular boss; The right annular boss of 6-;
7-ring soldered one; 8-ring soldered two.
Embodiment
Embodiment 1
A kind of coal winning machine height-adjusting system as shown in Figure 2 is with heightening change-over valve core, comprise valve core 1 and two left core print 2 and right core prints 3 that are installed in two end part, valve core 1 left and right sides respectively, described valve core 1 is a hollow, cylindrical tube, left side core print 2 and right core print 3 is the filled circles mast and the two is coaxial laying with valve core 1, valve core 1 and left core print 2 and right core print 3 all adopt the 35CrMo material to make.Described left core print 2 and right core print 3 plug-in mounting are respectively gone into the inboard, two ends, the left and right sides of valve core 1, the inboard correspondence of the left and right end portions of described valve core 1 is respectively arranged with the cylindric plug-in mounting mouth for left core print 2 and 3 installations of right core print, the bore of described cylindric plug-in mounting mouth is greater than the internal diameter of valve core 1, left side core print 2 is set to and the identical insertion head of described cylindric plug-in mounting mouth structure with the equal correspondence of the inner termination of right core print 3, and the bore of the external diameter of described insertion head and described cylindric plug-in mounting mouth is identical and the two horizontal width is identical.The insertion head arranged outside of described left core print 2 has left annular boss 5, the insertion head arranged outside of right core print 3 has right annular boss 6, the external diameter of described left annular boss 5 and the right annular boss 6 all external diameter with valve core 1 is identical, left side annular boss 5 and right annular boss 6 all adopt the 35CrMo material to make, and left annular boss 5 is an one with left core print 2 processing and fabricatings, and right annular boss 6 is an one with right core print 3 processing and fabricatings.The outer side wall of described left annular boss 5 and right annular boss 6 closely contacts with the left and right sides end face of valve core 1 respectively, described left annular boss 5 carries out the fixedly connected and corresponding ring soldered 1 that forms by welding manner between the two between valve core 1, described right annular boss 6 carries out the fixedly connected and corresponding ring soldered 28 that forms by welding manner between the two between valve core 1, described ring soldered 1 and ring soldered 28 along valve core 1 radially lay and the cross section of the two is the V font.That is to say, left side annular boss 5 is fastenedly connected by the ring soldered of radially laying along valve core 11 between valve core 1, and right annular boss 6 is fastenedly connected by the ring soldered of radially laying along valve core 128 between valve core 1.
Thereby the present invention adopts the coal winning machine height-adjusting system with structure and the size of heightening valve core 1 in the change-over valve core, and is all identical with heightening change-over valve core with original coal winning machine height-adjusting system; And in 3 two core prints of left core print 2 and right core print except that left annular boss 5 and right annular boss 6 are set respectively, the other parts structure of described left core print 2 and right core print 3 is all identical with heightening change-over valve core with original coal winning machine height-adjusting system with size.Simultaneously, the present invention adopts the as installed position of heightening change-over valve core all identical with heightening change-over valve core with original coal winning machine height-adjusting system with working principle.To sum up, the change-over valve core of heightening of the present invention is not done bigger improvement to original coal winning machine height-adjusting system with heightening change-over valve core, itself and original difference part of heightening change-over valve core only are: on 3 two core prints of left core print 2 and right core print left annular boss 5 and right annular boss 6 are set respectively, just because of have above-mentioned distinctive points, heighten with original that the square weld seam 4 between the left core print 2 and right core print 3 and valve core 1 is adjusted into ring soldered 1 and ring soldered 28 in the change-over valve core, and will be adjusted into the circular weld of radially laying along valve core 1 along original square weld seam 4 correspondences that valve core 1 is axially laid.Like this, the operating space that exists in the time of effectively solving existing square weld seam 4 welding is little, welding gun revolution etc. is restricted, operates that phenomenons such as rosin joint, lack of fusion appear in inconvenience, weld seam easily, the weld seam net sectional area is less, weld strength is lower, welding quality is wayward, welding quality is relatively poor, the more high multiple practical problem of reject rate.
During actual processing and fabricating, identical and the two the diameter of the diameter of described left core print 2 and right core print 3 is Φ 10mm ± 0.2mm, and the external diameter of valve core 1 is Φ 18mm ± 0.3mm.The structure of described ring soldered 1 and ring soldered 28 is all identical with size, and the horizontal width of described ring soldered 1 and ring soldered 28 is 3mm～5mm and the vertical degree of depth of the two is 3mm～5mm.
In the present embodiment, the diameter of described left core print 2 and right core print 3 is Φ 10mm, and the external diameter of valve core 1 is Φ 18mm, and the lateral length of valve core 1 is 91mm.The horizontal width of described ring soldered 1 and ring soldered 28 (specifically being the top cross width) is 3mm and the vertical degree of depth of the two is 3mm.
A kind of coal winning machine height-adjusting system as shown in Figure 3 may further comprise the steps with heightening change-over valve core boxing technology:
Step 1, groove are handled: with between left annular boss 5 and the valve core 1 and the face of weld between right annular boss 6 and the valve core 1 through machining processes forming V-shape groove, the groove angle of described single V groove is 45 °～60 °, and described single V groove is for along the circumferential direction to be laid between left annular boss 5 and the valve core 1 or the annular groove between right annular boss 6 and the valve core 1.
During actual welding, the structure and the consistent size of the mechanism of described single V groove and size and described ring soldered 1 and ring soldered 28.In the present embodiment, the groove angle of described single V groove is 45 °.
In the present embodiment, the top cross width of described single V groove is that 3mm and its vertical degree of depth are 3mm.
Step 2, weld preheating: adopt cutting torch that between left annular boss 5 and the valve core 1 and welding part between right annular boss 6 and the valve core 1 is heated, and adopt temperature measuring equipment that the surface temperature of welding part is detected in real time in the heating process, until the surface temperature in welding part and the peripheral 20mm scope thereof is heated to till 300 ℃～350 ℃.
In the present embodiment, the cutting torch described in the step 2 is oxygen-acetylene cutting torch, and described oxygen-acetylene cutting torch is an injector cutting torch.When carrying out weld preheating, the preheat flame of the neutral flame that adopts described cutting torch when heating.Actual when carrying out preheating, also can adopt other type cutting torch between left annular boss 5 and the valve core 1 or the face of weld between right annular boss 6 and the valve core 1 carry out preheating.
In the present embodiment, the temperature measuring equipment that is adopted is the infrared thermometry device, and actual when carrying out preheating, just stops preheating after the welding part surface temperature is heated to 300 ℃.During actual preheating, can preheating temperature be adjusted accordingly in 300 ℃～350 ℃ scopes according to the concrete needs of reality.After the weld preheating process, can prevent effectively that phenomenons such as crackle from appearring in welded part surface (surface that specifically refers to left annular boss 5, right annular boss 6 or valve core 1).
Step 3, boxing: adopt welding equipment and according to conventional welding method, connecting port between connecting port between left annular boss 5 and the valve core 1 and right annular boss 6 and the valve core 1 is welded, and corresponding formation ring soldered 1 and ring soldered 28, the spool body that then obtains to be welded as a whole and form by valve core 1, left core print 2 and right core print 3.
During actual the welding, the welding equipment that is adopted is the argon tungsten-arc welding welding machine, and welds under inert gas shielding.In the actual welding process, welding current is 180A～220A, and weldingvoltage is 15V～20V, and the gas flow of inert gas is 15L/min～20L/min.
In the present embodiment, the argon tungsten-arc welding welding machine that is adopted is a Nebula400 digitizing inverter type welder, and welding used welding wire is the TIG-J50 welding wire, and the inert gas that is adopted is quality purity 〉=99.99% of argon gas and used argon gas.During actual welding, also can select for use ER50-6 welding wire and other 50 feather weight welding wire to weld, and also can select the argon tungsten-arc welding welding machine of other model to weld, also can select other shielding gas for use simultaneously according to the concrete needs of reality.
In the present embodiment, the specification of the TIG-J50 welding wire that adopts is Φ 1.0 * 1000mm, comprise following chemical composition by weight percentage: 0.05%～0.12%C, 1.20%～1.50%Mn, 0.60%～0.85%Si, ≤ 0.025%S, ≤ 0.025%P ,≤0.30%Cu and other alloying elements of≤0.50%, the tensile strength 〉=490Mpa of TIG-J50 welding wire, yield strength 〉=400Mpa, elongation percentage 〉=22%.
In the present embodiment, during actual the welding, welding current is 180A, and weldingvoltage is 15V, and the gas flow of inert gas is 15L/min.During actual welding, can adjust accordingly the said welding method parameter according to the concrete needs of reality.
Step 4, postweld heat preservation: the described spool body integral body that obtains after welding finishes in the step 3 is embedded in the unslaked lime and is incubated, till described spool body is cooled to room temperature.
Embodiment 2
In the present embodiment, what machined heightens the change-over valve core structure as different from Example 1: the horizontal width of described ring soldered 1 and ring soldered 28 (specifically being the top cross width) is 4mm and the vertical degree of depth of the two is 4mm, and the structure of remaining part is all identical with embodiment 1 with the position relation.
In the present embodiment, the boxing technology when carrying out boxing to heightening change-over valve core as different from Example 1: the groove angle of single V groove described in the step 1 is 50 °, and the top cross width of described single V groove is that 4mm and its vertical degree of depth are 4mm; When carrying out weld preheating in the step 2, just stop preheating after the welding part surface temperature is heated to 310 ℃; During actual the welding, welding current is 190A in the step 3, and weldingvoltage is 16V, and the gas flow of inert gas is 16L/min.In the present embodiment, all the other welding step are all identical with embodiment 1 with process parameter.
Embodiment 3
In the present embodiment, what machined heightens the change-over valve core structure as different from Example 1: the horizontal width of described ring soldered 1 and ring soldered 28 (specifically being the top cross width) is 4mm and the vertical degree of depth of the two is 4mm, and the structure of remaining part is all identical with embodiment 1 with the position relation.
In the present embodiment, the boxing technology when carrying out boxing to heightening change-over valve core as different from Example 1: the groove angle of single V groove described in the step 1 is 55 °, and the top cross width of described single V groove is that 4mm and its vertical degree of depth are 4mm; When carrying out weld preheating in the step 2, just stop preheating after the welding part surface temperature is heated to 320 ℃; During actual the welding, welding current is 200A in the step 3, and weldingvoltage is 17V, and the gas flow of inert gas is 17L/min.In the present embodiment, all the other welding step are all identical with embodiment 1 with process parameter.
Embodiment 4
In the present embodiment, what machined heightens the change-over valve core structure as different from Example 1: the horizontal width of described ring soldered 1 and ring soldered 28 (specifically being the top cross width) is 5mm and the vertical degree of depth of the two is 5mm, and the structure of remaining part is all identical with embodiment 1 with the position relation.
In the present embodiment, the boxing technology when carrying out boxing to heightening change-over valve core as different from Example 1: the groove angle of single V groove described in the step 1 is 60 °, and the top cross width of described single V groove is that 5mm and its vertical degree of depth are 5mm; When carrying out weld preheating in the step 2, just stop preheating after the welding part surface temperature is heated to 330 ℃; During actual the welding, welding current is 210A in the step 3, and weldingvoltage is 18V, and the gas flow of inert gas is 18L/min.In the present embodiment, all the other welding step are all identical with embodiment 1 with process parameter.
Embodiment 5
In the present embodiment, what machined heightens the change-over valve core structure as different from Example 1: the horizontal width of described ring soldered 1 and ring soldered 28 (specifically being the top cross width) is 4mm and the vertical degree of depth of the two is 4mm, and the structure of remaining part is all identical with embodiment 1 with the position relation.
In the present embodiment, the boxing technology when carrying out boxing to heightening change-over valve core as different from Example 1: the groove angle of single V groove described in the step 1 is 65 °, and the top cross width of described single V groove is that 4mm and its vertical degree of depth are 4mm; When carrying out weld preheating in the step 2, just stop preheating after the welding part surface temperature is heated to 340 ℃; During actual the welding, welding current is 220A in the step 3, and weldingvoltage is 19V, and the gas flow of inert gas is 19L/min.In the present embodiment, all the other welding step are all identical with embodiment 1 with process parameter.
Embodiment 6
In the present embodiment, what machined heightens the change-over valve core structure as different from Example 1: the horizontal width of described ring soldered 1 and ring soldered 28 (specifically being the top cross width) is 5mm and the vertical degree of depth of the two is 5mm, and the structure of remaining part is all identical with embodiment 1 with the position relation.
In the present embodiment, the boxing technology when carrying out boxing to heightening change-over valve core as different from Example 1: the groove angle of single V groove described in the step 1 is 60 °, and the top cross width of described single V groove is that 5mm and its vertical degree of depth are 5mm; When carrying out weld preheating in the step 2, just stop preheating after the welding part surface temperature is heated to 350 ℃; During actual the welding, welding current is 220A in the step 3, and weldingvoltage is 20V, and the gas flow of inert gas is 20L/min.In the present embodiment, all the other welding step are all identical with embodiment 1 with process parameter.
The above; it only is preferred embodiment of the present invention; be not that the present invention is imposed any restrictions, everyly any simple modification that above embodiment did, change and equivalent structure changed, all still belong in the protection domain of technical solution of the present invention according to the technology of the present invention essence.
Claims (10)
1. a coal winning machine height-adjusting system is with heightening change-over valve core, comprise valve core (1) and two left core print (2) and right core prints (3) that are installed in valve core (1) two end part, the left and right sides respectively, described valve core (1) is a hollow, cylindrical tube, left side core print (2) and right core print (3) is the filled circles mast and the two is coaxial laying with valve core (1), valve core (1) and left core print (2) and right core print (3) all adopt the 35CrMo material to make; Left side core print (2) and right core print (3) plug-in mounting are respectively gone into the inboard, two ends, the left and right sides of valve core (1), the inboard correspondence of the left and right end portions of described valve core (1) is respectively arranged with the cylindric plug-in mounting mouth for left core print (2) and right core print (3) installation, the bore of described cylindric plug-in mounting mouth is greater than the internal diameter of valve core (1), the equal correspondence of inner termination of left side core print (2) and right core print (3) is set to and the identical insertion head of described cylindric plug-in mounting mouth structure, the bore of the external diameter of described insertion head and described cylindric plug-in mounting mouth is identical and the two horizontal width is identical, it is characterized in that: the insertion head arranged outside of described left core print (2) has left annular boss (5), the insertion head arranged outside of right core print (3) has right annular boss (6), the external diameter of described left annular boss (5) and right annular boss (6) all external diameter with valve core (1) is identical, left side annular boss (5) and right annular boss (6) all adopt the 35CrMo material to make, and left annular boss (5) is an one with left core print (2) processing and fabricating, and right annular boss (6) is an one with right core print (3) processing and fabricating; The outer side wall of described left annular boss (5) and right annular boss (6) closely contacts with the left and right sides end face of valve core (1) respectively, described left annular boss (5) carries out the fixedly connected and corresponding ring soldered one (7) that forms by welding manner between the two between valve core (1), described right annular boss (6) carries out the fixedly connected and corresponding ring soldered two (8) that forms by welding manner between the two between valve core (1), described ring soldered one (7) and ring soldered two (8) along valve core (1) radially lay and the cross section of the two is the V font.
According to the described coal winning machine height-adjusting system of claim 1 with heightening change-over valve core, it is characterized in that: identical and the two the diameter of the diameter of described left core print (2) and right core print (3) is Φ 10mm ± 0.2mm, and the external diameter of valve core (1) is Φ 18mm ± 0.3mm; The structure of described ring soldered one (7) and ring soldered two (8) is all identical with size, and the horizontal width of described ring soldered one (7) and ring soldered two (8) is 3mm～5mm and the vertical degree of depth of the two is 3mm～5mm.
One kind to coal winning machine height-adjusting system according to claim 1 with heightening the technology that change-over valve core carries out boxing, it is characterized in that this technology may further comprise the steps:
Step 1, groove are handled: with between left annular boss (5) and the valve core (1) and the face of weld between right annular boss (6) and the valve core (1) through machining processes forming V-shape groove, the groove angle of described single V groove is 45 °～60 °, and described single V groove is for along the circumferential direction to be laid between left annular boss (5) and the valve core (1) or the annular groove between right annular boss (6) and the valve core (1);
Step 2, weld preheating: adopt cutting torch that between left annular boss (5) and the valve core (1) and the welding part between right annular boss (6) and the valve core (1) is heated, and adopt temperature measuring equipment that the surface temperature of welding part is detected in real time in the heating process, until the surface temperature in welding part and the peripheral 20mm scope thereof is heated to till 300 ℃～350 ℃;
Step 3, boxing: adopt welding equipment and according to conventional welding method, connecting port between connecting port between left annular boss (5) and the valve core (1) and right annular boss (6) and the valve core (1) is welded, and corresponding formation ring soldered one (7) and ring soldered two (8), the spool body that then obtains to be welded as a whole and form by valve core (1), left core print (2) and right core print (3);
Step 4, postweld heat preservation: the described spool body integral body that obtains after welding finishes in the step 3 is embedded in the unslaked lime and is incubated, till described spool body is cooled to room temperature.
4. according to the described coal winning machine height-adjusting system of the claim 3 boxing technology of heightening change-over valve core, it is characterized in that: the welding equipment described in the step 3 is the argon tungsten-arc welding welding machine.
5. according to claim 3 or the 4 described coal winning machine height-adjusting systems boxing technologies of heightening change-over valve core; it is characterized in that: when welding in the step 3; under inert gas shielding, weld, and to weld used welding wire be TIG-J50 welding wire or ER50-6 welding wire.
6. according to claim 3 or the 4 described coal winning machine height-adjusting systems boxing technologies of heightening change-over valve core, it is characterized in that: when welding in the step 3, welding current is 180A～220A, and weldingvoltage is 15V～20V, and the gas flow of inert gas is 15L/min～20L/min.
7. according to the described coal winning machine height-adjusting system of the claim 4 boxing technology of heightening change-over valve core, it is characterized in that: described argon tungsten-arc welding welding machine is a Nebula400 digitizing inverter type welder.
8. according to claim 3 or the 4 described coal winning machine height-adjusting systems boxing technologies of heightening change-over valve core, it is characterized in that: the cutting torch described in the step 2 is oxygen-acetylene cutting torch.
9. according to the described coal winning machine height-adjusting system of the claim 8 boxing technology of heightening change-over valve core, it is characterized in that: described oxygen-acetylene cutting torch is an injector cutting torch.
According to claim 3 or 4 described coal winning machine height-adjusting systems with the boxing technologies of heightening change-over valve core, it is characterized in that: when carrying out weld preheating in the step 2, the preheat flame of the neutral flame that adopts described cutting torch when heating.
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| CN 201110098183 CN102168698B (en) | 2011-04-19 | 2011-04-19 | Valve plug of height adjustment reversing valve and girth welding process thereof for height adjustment system of coal mining machine |
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| CN 201110098183 CN102168698B (en) | 2011-04-19 | 2011-04-19 | Valve plug of height adjustment reversing valve and girth welding process thereof for height adjustment system of coal mining machine |
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| CN104193148A (en) * | 2014-08-04 | 2014-12-10 | 蚌埠凯盛工程技术有限公司 | Side drawing rod and side drawing head assembly sealing structure |
| CN104259683A (en) * | 2014-08-04 | 2015-01-07 | 蚌埠凯盛工程技术有限公司 | Welding structure of edge pulling head of edge pulling machine |
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| CN102168698B (en) | 2013-06-19 |
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