CN102168698B - 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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- CN102168698B CN102168698B CN 201110098183 CN201110098183A CN102168698B CN 102168698 B CN102168698 B CN 102168698B CN 201110098183 CN201110098183 CN 201110098183 CN 201110098183 A CN201110098183 A CN 201110098183A CN 102168698 B CN102168698 B CN 102168698B
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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 heightening system of coal mining machine with heighten valve group manufacturing technical field, especially relate to a kind of heightening reversing valve spool used for heightening system of coal mining machine and boxing technique thereof.
Background technique
Heightening system of coal mining machine is for realizing that heightening of coal mining machine roller needs to arrange, and nowadays heightening system of coal mining machine adopts hydraulic system mostly, usually is referred to as height-adjustment hydraulic system for coal mining machine.In 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 pump box.Heighten pump box and be parts independently, main body is welded fuel tank and motor housing, and plane layout one drawer plate on casing, all hydraulic component and pipeline are all fixing on this drawer plate and connect.Independently heighten the pump box parts within 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 normal operation, 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, at the upper plane layout of casing, air-strainer (air hole) is arranged, and also this filter cleaner can be pulled down, from this oiling.
During actual the use, the working principle of height-adjustment hydraulic system for coal mining machine is: turned round by the motor drive gear pump, gear pump by oil-suction oil filter from the fuel tank oil suction, heightening selector valve not under 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 that cylinder is adjusted to the right place until heighten the selector valve shut-down operation.Be provided with the safety valve and the pressure gauge that prevent gear pump and system pressure overload on gear pump oil extraction oil circuit, be provided with low-pressure meter at the front end of low pressure relief valve.Be provided with hydraulic lock and fix on needed height and position to guarantee tumbler lock on adjust high cylinder, also be provided with in addition safety valve on oil cylinder, be 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 height-adjustment hydraulic system for coal mining machine, 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 for heightening the control oil sources of selector valve group electro-hydraulic control valve and the control oil sources of left and right tractive unit hydraulic brake.
Heightening selector valve (also claiming the heighten valve group) is the control unit that Rocker drum is heightened, and it is comprised 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 be arranged on spool in valve body, and spool moves around at valve inner under driving mechanism drives.During actual the use, the working principle of heightening selector valve is: when the left electromagnet of solenoid valve charged, control fluid and promote hand, liquid controlled reversing valve events (specifically promoting the spool action of 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 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 and promote hand, liquid controlled reversing valve events (specifically promoting the spool action of H type 3-position 4-way hand, pilot operated directional control valve) by solenoid valve, heighten pressure oil and lead to the B mouth by the P mouth and enter adjust high cylinder another chamber, the oil cylinder oil return by the A mouth through receive and distribute, pilot operated directional control valve oil return pond.Under manual case, due to 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 arranged on respectively valve core 1 two end part, left and right, described valve core 1 is the inner hollow cylindrical tube that is, left core print 2 and right core print 3 are the filled circles mast, left core print 2 and right core print 3 respectively plug-in mounting to enter valve core 1 two ends, left and right inboard, 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 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, the corresponding structure plug-in mounting termination consistent with described cylindric plug-in mounting mouth of being coaxially arranged with on left core print 2 and 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 horizontal width both 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 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 core print 2 and right core print 3 and valve core 1 is along the axial design of valve core 1, have following practical problem during actual the use: in welding process, the operating space is little on the one hand, welding gun revolution etc. is restricted, and the phenomenons such as rosin joint, lack of fusion easily appear in weld seam; Because distance between the toes of a weld only has 2mm, net sectional area itself is less on the other hand, 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 many factors, welding quality can not be effectively controlled simultaneously, and reject rate is higher.To sum up, existing heightening reversing valve spool is owing to being subject to structural limitations, and weld seam is narrow and little, adopts the gas welding mode on welding procedure, welds as packing material with copper.In actual using process, weld seam sealing-off phenomenon repeatedly occurs, have a strong impact on quality of product.The reason of sealing-off is mainly 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 inadequate.
Summary of the invention
Technical problem to be solved by this invention is for 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 heightening reversing valve spool used for heightening system of coal mining machine of steady quality.
for solving the problems of the technologies described above, the technical solution used in the present invention is: a kind of heightening reversing valve spool used for heightening system of coal mining machine, comprise valve core and two left core print and right core prints that are arranged on respectively two end part, valve core left and right, described valve core is hollow, cylindrical tube, left core print and right core print are the filled circles mast and both are coaxial laying with valve core, and valve core and left core print and right core print all adopt the 35CrMo material to make, left core print and right core print respectively plug-in mounting to enter the two ends, left and right of valve core inboard, 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 the inner termination of left core print and right core print is set to the insertion head identical with 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 horizontal width both 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 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 integrated, right annular boss and right core print processing and fabricating are integrated, the outer side wall of described left annular boss and right annular boss respectively with the left and right end face close contact of valve core, described left annular boss with between valve core by welding manner be fixed connect and corresponding form between both together with ring soldered one, described right annular boss with between valve core by welding manner be fixed connect and corresponding form between both together with ring soldered two, described ring soldered one and ring soldered two along valve core radially lay and both cross section is the V font.
Above-mentioned heightening reversing valve spool used for heightening system of coal mining machine is characterized in that: the identical and diameter both 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; Structure and the size of described ring soldered one and ring soldered two are all identical, and the horizontal width of described ring soldered one and ring soldered two is 3mm～5mm and vertical degree of depth both is 3mm～5mm.
Simultaneously, the invention also discloses the boxing technique of the heightening reversing valve spool used for heightening system of coal mining machine that a kind of welding step is simple, easy to operate, welding quality is easily controlled and welding quality is high, reject rate is low, it is characterized in that this technique comprises the following steps:
Step 1, groove are processed: with between left annular boss and valve core and the machined single V groove that is processed into of the face of weld between right annular boss and valve core, 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 valve core or the annular groove between right annular boss and valve core;
Step 3, boxing: adopt welding equipment and according to the normal welding method, connecting port between connecting port between left annular boss and valve core and right annular boss and valve core is welded, and corresponding formation ring soldered one and ring soldered two, the spool body that obtains to be welded as a whole and formed by valve core, left core print and right core print;
Step 4, postweld heat preservation: the described spool body integral body that obtains after in step 3, welding finishes is embedded in unslaked lime and is incubated, until till described spool body is cooled to room temperature.
Above-mentioned heightening reversing valve spool used for heightening system of coal mining machine boxing technique is characterized in that: the welding equipment described in step 3 is the Tig Welding machine.
Above-mentioned heightening reversing valve spool used for heightening system of coal mining machine boxing technique is characterized in that: when welding in step 3, weld under inert gas shielding, and to weld welding wire used be TIG-J50 welding wire or ER50-6 welding wire.
Above-mentioned heightening reversing valve spool used for heightening system of coal mining machine boxing technique is characterized in that: when welding in 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 heightening reversing valve spool used for heightening system of coal mining machine boxing technique is characterized in that: described Tig Welding machine is the Nebula400 digital inverse welder.
Above-mentioned heightening reversing valve spool used for heightening system of coal mining machine boxing technique is characterized in that: the cutting torch described in step 2 is welding torch.
Above-mentioned heightening reversing valve spool used for heightening system of coal mining machine boxing technique is characterized in that: described welding torch is injector cutting torch.
Above-mentioned heightening reversing valve spool used for heightening system of coal mining machine boxing technique is characterized in that: when carrying out weld preheating in step 2, and the preheat flame when the neutral flame conduct of the described cutting torch of employing is heated.
The present invention compared with prior art has the following advantages:
1, simple in structure and reasonable in design, need not existing heightening reversing valve spool structure is done larger change, processing and fabricating is convenient and input cost is lower.
2, quality of product is high, and formed ring size of weld is wide and large, 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, due to 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, unrestricted and adopt V font weld seam wide outside and narrow inside due to the operating space, not only groove is processed conveniently, and the root of weld can fully be touched and effectively weld, thereby weld formed weld seam and be not prone to the 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 larger, and weld strength is higher.
5, welding quality is controlled easily, and reject rate is lower.
6, the using effect of made spool is good, radially lays due to weld seam is adjusted into along valve core, and is spatially unrestricted when making welding on the one hand, facilitates welding operation, can guarantee the thorough through welding of weld seam, prevents that defective from producing, and guarantees 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 by original brazing into present argon tungsten-arc welding, adopt 50 feather weight welding wires as packing material, before weldering, work is preheated to 300 ℃, postwelding is incubated rapidly, thereby the weld defectss such as pore, undercut do not occur, can guarantee weld strength, reduce welding heat, prevent that workpiece is breakdown.
7, significantly extend 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, decrease after cost.
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, and in the time of effectively solving the welding that has the spool existence now, the operating space is little, operation is inconvenient, 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 structural representation of existing heightening reversing valve spool used for heightening system of coal mining machine.
Fig. 2 is the structural representation of heightening reversing valve spool that the present invention adopts.
Fig. 3 is the boxing process flow diagram of the present invention when heightening reversing valve spool is welded.
Description of reference numerals:
The 1-valve core; The left core print of 2-; The right core print of 3-;
The square weld seam of 4-; The left annular boss of 5-; The right annular boss of 6-;
7-ring soldered one; 8-ring soldered two.
Embodiment
Embodiment 1
A kind of heightening reversing valve spool used for heightening system of coal mining machine as shown in Figure 2, comprise valve core 1 and two left core print 2 and right core prints 3 that are arranged on respectively valve core 1 two end part, left and right, described valve core 1 is hollow, cylindrical tube, left core print 2 and right core print 3 are the filled circles mast and both are coaxial laying with valve core 1, and valve core 1 all adopts the 35CrMo material to make with left core print 2 and right core print 3.Described left core print 2 and right core print 3 respectively plug-in mounting to enter the two ends, left and right of valve core 1 inboard, 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 core print 2 is set to the insertion head identical with 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 horizontal width both 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 annular boss 5 and right annular boss 6 all adopt the 35CrMo material to make, and left annular boss 5 is integrated with left core print 2 processing and fabricatings, and right annular boss 6 is integrated with right core print 3 processing and fabricatings.The outer side wall of described left annular boss 5 and right annular boss 6 respectively with the left and right end face close contact of valve core 1, described left annular boss 5 with between valve core 1 by welding manner be fixed connect and corresponding form between both together with ring soldered 1, described right annular boss 6 with between valve core 1 by welding manner be fixed connect and corresponding form between both together with ring soldered 28, described ring soldered 1 and ring soldered 28 along valve core 1 radially lay and both cross section is the V font.That is to say, left annular boss 5 with between valve core 1 by together with the ring soldered 1 radially laid along valve core 1 be fastenedly connected, right annular boss 6 with between valve core 1 by together with the ring soldered 28 radially laid along valve core 1 be fastenedly connected.
Thereby the present invention adopts structure and the size of valve core 1 in heightening reversing valve spool used for heightening system of coal mining machine, and is all identical with original heightening reversing valve spool used for heightening system of coal mining machine; And in 3 two core prints of left core print 2 and right core print except 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 original heightening reversing valve spool used for heightening system of coal mining machine with size.The as installed position of heightening reversing valve spool that the present invention simultaneously, adopts is all identical with original heightening reversing valve spool used for heightening system of coal mining machine with working principle.to sum up, heightening reversing valve spool of the present invention is not done larger improvement to original heightening reversing valve spool used for heightening system of coal mining machine, the difference part of itself and original heightening reversing valve spool only is: 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, square weld seam 4 between the left core print 2 of original heightening reversing valve spool and right core print 3 and valve core 1 is adjusted into ring soldered 1 and ring soldered 28, 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 the phenomenons such as rosin joint, lack of fusion easily appear in inconvenience, weld seam, 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, the identical and diameter both 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.Structure and the size of described ring soldered 1 and ring soldered 28 are all identical, and the horizontal width of described ring soldered 1 and ring soldered 28 is 3mm～5mm and vertical degree of depth both 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 top cross width) is 3mm and vertical degree of depth both is 3mm.
A kind of heightening reversing valve spool used for heightening system of coal mining machine boxing technique as shown in Figure 3 comprises the following steps:
Step 1, groove are processed: with between left annular boss 5 and valve core 1 and the machined single V groove that is processed into of the face of weld between right annular boss 6 and valve core 1, 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 valve core 1 or the annular groove between right annular boss 6 and valve core 1.
During actual welding, 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.
In the present embodiment, the cutting torch described in step 2 is welding torch, and described welding torch is injector cutting torch.When carrying out weld preheating, the preheat flame when the neutral flame conduct of the described cutting torch of employing is heated.Actual when carrying out preheating, also can adopt other type cutting torch between left annular boss 5 and valve core 1 or the face of weld between right annular boss 6 and valve core 1 carry out preheating.
In the present embodiment, the temperature measuring equipment that adopts is 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 needs concrete according to reality, preheating temperature is adjusted accordingly in 300 ℃～350 ℃ scopes.After the weld preheating process, can prevent effectively that the 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 the normal welding method, connecting port between connecting port between left annular boss 5 and valve core 1 and right annular boss 6 and valve core 1 is welded, and corresponding formation ring soldered 1 and ring soldered 28, the spool body that obtains to be welded as a whole and formed by valve core 1, left core print 2 and right core print 3.
During actual the welding, the welding equipment that adopts is the Tig 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 Tig Welding machine that adopts is the Nebula400 digital inverse welder, and welding welding wire used is the TIG-J50 welding wire, and the inert gas that adopts is the quality purity 〉=99.99% of argon gas and argon gas used.During actual welding, also can select ER50-6 welding wire and other 50 feather weight welding wire to weld, and also can select the Tig Welding machine of other model to weld by needs concrete according to reality, also can select other shielding gas simultaneously.
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 the said welding method parameter be adjusted accordingly needs concrete according to reality.
Step 4, postweld heat preservation: the described spool body integral body that obtains after in step 3, welding finishes is embedded in unslaked lime and is incubated, until till described spool body is cooled to room temperature.
In the present embodiment, the heightening reversing valve spool structure that machines is as different from Example 1: the horizontal width of described ring soldered 1 and ring soldered 28 (specifically top cross width) is 4mm and vertical degree of depth both is 4mm, and the structure of remaining part and position relationship are all identical with embodiment 1.
In the present embodiment, the boxing technique when heightening reversing valve spool is carried out boxing as different from Example 1: the groove angle of single V groove described in 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 step 2, after being heated to 310 ℃, the welding part surface temperature just stops preheating; In step 3, during actual the welding, welding current is 190A, and weldingvoltage is 16V, and the gas flow of inert gas is 16L/min.In the present embodiment, all the other welding step and process parameter are all identical with embodiment 1.
Embodiment 3
In the present embodiment, the heightening reversing valve spool structure that machines is as different from Example 1: the horizontal width of described ring soldered 1 and ring soldered 28 (specifically top cross width) is 4mm and vertical degree of depth both is 4mm, and the structure of remaining part and position relationship are all identical with embodiment 1.
In the present embodiment, the boxing technique when heightening reversing valve spool is carried out boxing as different from Example 1: the groove angle of single V groove described in 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 step 2, after being heated to 320 ℃, the welding part surface temperature just stops preheating; In step 3, during actual the welding, welding current is 200A, and weldingvoltage is 17V, and the gas flow of inert gas is 17L/min.In the present embodiment, all the other welding step and process parameter are all identical with embodiment 1.
Embodiment 4
In the present embodiment, the heightening reversing valve spool structure that machines is as different from Example 1: the horizontal width of described ring soldered 1 and ring soldered 28 (specifically top cross width) is 5mm and vertical degree of depth both is 5mm, and the structure of remaining part and position relationship are all identical with embodiment 1.
In the present embodiment, the boxing technique when heightening reversing valve spool is carried out boxing as different from Example 1: the groove angle of single V groove described in 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 step 2, after being heated to 330 ℃, the welding part surface temperature just stops preheating; In step 3, during actual the welding, welding current is 210A, and weldingvoltage is 18V, and the gas flow of inert gas is 18L/min.In the present embodiment, all the other welding step and process parameter are all identical with embodiment 1.
Embodiment 5
In the present embodiment, the heightening reversing valve spool structure that machines is as different from Example 1: the horizontal width of described ring soldered 1 and ring soldered 28 (specifically top cross width) is 4mm and vertical degree of depth both is 4mm, and the structure of remaining part and position relationship are all identical with embodiment 1.
In the present embodiment, the boxing technique when heightening reversing valve spool is carried out boxing as different from Example 1: the groove angle of single V groove described in 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 step 2, after being heated to 340 ℃, the welding part surface temperature just stops preheating; In step 3, during actual the welding, welding current is 220A, and weldingvoltage is 19V, and the gas flow of inert gas is 19L/min.In the present embodiment, all the other welding step and process parameter are all identical with embodiment 1.
Embodiment 6
In the present embodiment, the heightening reversing valve spool structure that machines is as different from Example 1: the horizontal width of described ring soldered 1 and ring soldered 28 (specifically top cross width) is 5mm and vertical degree of depth both is 5mm, and the structure of remaining part and position relationship are all identical with embodiment 1.
In the present embodiment, the boxing technique when heightening reversing valve spool is carried out boxing as different from Example 1: the groove angle of single V groove described in 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 step 2, after being heated to 350 ℃, the welding part surface temperature just stops preheating; In step 3, during actual the welding, welding current is 220A, and weldingvoltage is 20V, and the gas flow of inert gas is 20L/min.In the present embodiment, all the other welding step and process parameter are all identical with embodiment 1.
The above; it is only preferred embodiment of the present invention; be not that the present invention is imposed any restrictions, every any simple modification, change and equivalent structure of above embodiment being done according to the technology of the present invention essence changes, and all still belongs in the protection domain of technical solution of the present invention.
Claims (10)
1. heightening reversing valve spool used for heightening system of coal mining machine, comprise valve core (1) and two left core print (2) and right core prints (3) that are arranged on respectively valve core (1) two end part, left and right, described valve core (1) is hollow, cylindrical tube, left core print (2) and right core print (3) are the filled circles mast and both are coaxial laying with valve core (1), and valve core (1) all adopts the 35CrMo material to make with left core print (2) and right core print (3), left core print (2) and right core print (3) respectively plug-in mounting to enter the two ends, left and right of valve core (1) inboard, 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 core print (2) and right core print (3) is set to the insertion head identical with 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 horizontal width both 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 annular boss (5) and right annular boss (6) all adopt the 35CrMo material to make, and left annular boss (5) is integrated with left core print (2) processing and fabricating, right annular boss (6) is integrated with right core print (3) processing and fabricating, the outer side wall of described left annular boss (5) and right annular boss (6) respectively with the left and right end face close contact of valve core (1), described left annular boss (5) with between valve core (1) by welding manner be fixed connect and corresponding form between both together with ring soldered one (7), described right annular boss (6) with between valve core (1) by welding manner be fixed connect and corresponding form between both together with ring soldered two (8), described ring soldered one (7) and ring soldered two (8) along valve core (1) radially lay and both cross section is the V font.
2. according to heightening reversing valve spool used for heightening system of coal mining machine claimed in claim 1, it is characterized in that: the identical and diameter both 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; Structure and the size of described ring soldered one (7) and ring soldered two (8) are all identical, and the horizontal width of described ring soldered one (7) and ring soldered two (8) is 3mm～5mm and vertical degree of depth both is 3mm～5mm.
3. technique that heightening reversing valve spool used for heightening system of coal mining machine is as claimed in claim 1 carried out boxing is characterized in that this technique comprises the following steps:
Step 1, groove are processed: with the machined single V groove that is processed into of face of weld between left annular boss (5) and valve core (1) and between right annular boss (6) and valve core (1), 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 valve core (1) or the annular groove between right annular boss (6) and valve core (1);
Step 2, weld preheating: adopt cutting torch that between left annular boss (5) and valve core (1) and the welding part between right annular boss (6) and valve core (1) is heated, and adopt temperature measuring equipment that the surface temperature of welding part is detected in real time in heating process, until the surface temperature in welding part and peripheral 20mm scope thereof is heated to till 300 ℃～350 ℃;
Step 3, boxing: adopt welding equipment and according to the normal welding method, connecting port between connecting port between left annular boss (5) and valve core (1) and right annular boss (6) and valve core (1) is welded, and corresponding formation ring soldered one (7) and ring soldered two (8), the spool body that obtains to be welded as a whole and formed 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 in step 3, welding finishes is embedded in unslaked lime and is incubated, until till described spool body is cooled to room temperature.
4. according to the boxing technique of heightening reversing valve spool used for heightening system of coal mining machine claimed in claim 3, it is characterized in that: the welding equipment described in step 3 is the Tig Welding machine.
5. according to the boxing technique of claim 3 or 4 described heightening reversing valve spool used for heightening system of coal mining machines; it is characterized in that: when welding in step 3; weld under inert gas shielding, and to weld welding wire used be TIG-J50 welding wire or ER50-6 welding wire.
6. according to the boxing technique of claim 3 or 4 described heightening reversing valve spool used for heightening system of coal mining machines, it is characterized in that: when welding in 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 boxing technique of heightening reversing valve spool used for heightening system of coal mining machine claimed in claim 4, it is characterized in that: described Tig Welding machine is the Nebula400 digital inverse welder.
8. according to the boxing technique of claim 3 or 4 described heightening reversing valve spool used for heightening system of coal mining machines, it is characterized in that: the cutting torch described in step 2 is welding torch.
9. according to the boxing technique of heightening reversing valve spool used for heightening system of coal mining machine claimed in claim 8, it is characterized in that: described welding torch is injector cutting torch.
10. according to the boxing technique of claim 3 or 4 described heightening reversing valve spool used for heightening system of coal mining machines, it is characterized in that: when carrying out weld preheating in step 2, the preheat flame when the neutral flame conduct of the described cutting torch of employing is heated.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| 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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| Application Number | Priority Date | Filing Date | Title |
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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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| CN102168698B true CN102168698B (en) | 2013-06-19 |
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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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| DE2410045A1 (en) * | 1974-03-02 | 1975-09-11 | Rexroth Gmbh G L | Hand operating lever for multi way spool valve - is linked to spool at right angle by plastic elements |
| CN101108443A (en) * | 2006-07-18 | 2008-01-23 | 中信重型机械公司 | Installing and soldering technique of inlet, outlet slip ring of large-scale sliding crawler mill barrel |
| CN201013367Y (en) * | 2007-03-12 | 2008-01-30 | 官磊 | Oil well sampling detecting valve |
| CN201377619Y (en) * | 2009-03-05 | 2010-01-06 | 无锡鹰贝精密轴承有限公司 | Valve core with guide structure |
| CN101664846A (en) * | 2009-09-09 | 2010-03-10 | 中国石油天然气集团公司 | Method for preparing test real object for G3 alloy oil well pipe by welding |
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|---|---|---|---|---|
| DE2410045A1 (en) * | 1974-03-02 | 1975-09-11 | Rexroth Gmbh G L | Hand operating lever for multi way spool valve - is linked to spool at right angle by plastic elements |
| CN101108443A (en) * | 2006-07-18 | 2008-01-23 | 中信重型机械公司 | Installing and soldering technique of inlet, outlet slip ring of large-scale sliding crawler mill barrel |
| CN201013367Y (en) * | 2007-03-12 | 2008-01-30 | 官磊 | Oil well sampling detecting valve |
| CN201377619Y (en) * | 2009-03-05 | 2010-01-06 | 无锡鹰贝精密轴承有限公司 | Valve core with guide structure |
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