CN114888399A - 32MPa pump head liquid inlet and outlet valve box valve hole abrasion welding device and welding process - Google Patents
32MPa pump head liquid inlet and outlet valve box valve hole abrasion welding device and welding process Download PDFInfo
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- CN114888399A CN114888399A CN202210418446.0A CN202210418446A CN114888399A CN 114888399 A CN114888399 A CN 114888399A CN 202210418446 A CN202210418446 A CN 202210418446A CN 114888399 A CN114888399 A CN 114888399A
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- 238000003466 welding Methods 0.000 title claims abstract description 206
- 239000007788 liquid Substances 0.000 title claims abstract description 55
- 238000000034 method Methods 0.000 title claims abstract description 30
- 238000005299 abrasion Methods 0.000 title claims abstract description 17
- 238000010438 heat treatment Methods 0.000 claims abstract description 43
- 239000000463 material Substances 0.000 claims abstract description 17
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 16
- 239000010410 layer Substances 0.000 claims description 12
- 238000003754 machining Methods 0.000 claims description 11
- 229910000831 Steel Inorganic materials 0.000 claims description 10
- 239000010959 steel Substances 0.000 claims description 10
- 230000007547 defect Effects 0.000 claims description 9
- 229910052786 argon Inorganic materials 0.000 claims description 8
- 229920000742 Cotton Polymers 0.000 claims description 7
- 239000007789 gas Substances 0.000 claims description 5
- 239000011229 interlayer Substances 0.000 claims description 5
- 229910001208 Crucible steel Inorganic materials 0.000 claims description 4
- 238000004140 cleaning Methods 0.000 claims description 4
- 238000001816 cooling Methods 0.000 claims description 4
- 238000009413 insulation Methods 0.000 claims description 4
- 238000007778 shielded metal arc welding Methods 0.000 claims description 4
- 238000005520 cutting process Methods 0.000 claims description 3
- 238000010891 electric arc Methods 0.000 claims description 3
- 239000004519 grease Substances 0.000 claims description 3
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 238000002485 combustion reaction Methods 0.000 claims description 2
- 238000010583 slow cooling Methods 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 238000004321 preservation Methods 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003034 coal gas Substances 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/0026—Arc welding or cutting specially adapted for particular articles or work
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/32—Accessories
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P6/00—Restoring or reconditioning objects
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Abstract
The invention discloses a 32MPa pump head liquid inlet and outlet valve box valve hole abrasion welding device which comprises a welding machine and a horizontal bottom plate seat, wherein locking devices are respectively arranged in four directions of the horizontal bottom plate seat, a plurality of adjustable supporting frames are also arranged on the horizontal bottom plate seat, and heating tools are arranged on the adjustable supporting frames; and a lengthened welding rod is arranged on the welding machine. The invention has novel design, reasonable structure, convenient material taking and manufacturing, simple and easy operation, and matching with the welding process, eliminates the welding stress by preheating 150-.
Description
Technical Field
The invention belongs to the technical field of welding, and relates to a 32MPa pump head liquid inlet and outlet valve box valve hole abrasion welding device and a welding process.
Background
The high-pressure pump house is one of the key departments of large steel enterprises and plays a crucial role in the production process of enterprises, for example, Baojiama rail material science and technology limited company, the high-pressure pump house is totally provided with 12 32MPa high-pressure pumps, and the generated high-pressure water enters a 40MPa high-pressure container tank and is specially supplied for a hydraulic system of a wheel and a wheel band rolling mill for a long time, so that the normal production of a rolling line is ensured. The core of the pump body of each 32MPa high-pressure pump device forms a spare part: the water supply device mainly comprises a driving piston, a reciprocating crankshaft, a transmission motor, a 32MPa pump head liquid inlet and outlet valve box and the like, wherein the driving piston, the reciprocating crankshaft, the transmission motor, the 32MPa pump head liquid inlet and outlet valve box and the like are mutually linked to do work during normal water supply, and due to long-term operation production, the situation that water leakage is more serious at the valve hole of the 32MPa pump head liquid inlet and outlet valve box of the pump body affects the normal operation water supply of the high-pressure pump. As shown in the sectional view of the 32MPa pump head intake and drainage valve box 6 shown in FIG. 2, the pump body 32MPa pump head intake and drainage valve box has three valve holes 61, and the shutdown and open inspection shows that the inner walls of the three valve holes of the pump body 32MPa pump head intake and drainage valve box are partially worn and fall off, so that the operation of the whole equipment cannot be coordinated. The reasons for the internal abrasion and falling of the three valve holes are analyzed through the technology: 1. the piston valve body spare parts which are linked up and down in the valve hole are frequently replaced since the use; 2. the inner wall of the liquid inlet and outlet valve box of the pump head with the pressure of the liquid of the pump body of 32MPa is impacted. If the liquid inlet and outlet valve boxes of the 32MPa pump head are completely replaced, not only is the time period for purchasing spare parts longer and the cost more, but also the cost is high and the time is long if the spare parts are sent to a manufacturer off line for repair, and the production requirement cannot be met. If on-site welding repair is considered, the strength of three valve holes of the liquid inlet and outlet valve box of the pump head with the pressure of 32MPa is not suitable for reaming repair, additive overlaying welding is required to be implemented, and the size and the precision of a drawing are recovered by on-line machining under the condition of ensuring no welding defects. Because the material of the liquid inlet and outlet valve box of the pump body 32MPa pump head is cast steel 35, although the weldability of this kind of material is better, still have the following problem when welding: (1) welding cracks are easy to generate, hot cracks are almost impossible to occur, but cold cracks cannot be ignored due to the concentration of hydrogen and the existence of hardening structures; (2) the liquid inlet and outlet valve boxes of the 32MPa pump head of the pump body are irregular in shape, so that the pump body is difficult to horizontally and vertically place and weld, and the vertical placing and welding of three valve holes of the liquid inlet and outlet valve boxes of the 32MPa pump head of the pump body cannot be ensured; (3) because the liquid inlet and outlet valve box of the pump head with the pressure of 32MPa is large in size and is subjected to on-site surfacing, if pre-welding preheating, interlayer temperature maintaining and post-welding heat treatment are carried out, a heating furnace is required, and the operation is very inconvenient; (4) and because the inner wall holes of the three valve holes of the liquid inlet and outlet valve box of the pump head with the pressure of 32MPa are phi 120mm, and the depth reaches about 420mm, any welding method can not meet the welding requirement.
Disclosure of Invention
Aiming at the technical problem existing in the background technology when the valve hole of the liquid inlet and outlet valve box of the 32MPa pump head is abraded, welded and repaired, the invention provides a welding device and a welding process for the abrasion of the valve hole of the liquid inlet and outlet valve box of the 32MPa pump head.
The technical scheme for solving the technical problem is as follows:
the invention relates to a 32MPa pump head liquid inlet and outlet valve box valve hole abrasion welding device, which comprises a welding machine and is characterized by further comprising a horizontal bottom plate seat, wherein locking devices are respectively arranged in four directions of the horizontal bottom plate seat, a plurality of adjustable supporting frames are further arranged on the horizontal bottom plate seat, and heating tools are arranged on the adjustable supporting frames; and a lengthened welding rod is arranged on the welding machine.
Further, the horizontal bottom plate seat is cuboid; the locking device comprises a plurality of lug seats which are respectively arranged on the peripheral edges of the upper part of the horizontal bottom plate seat, and the center of each lug seat is provided with a threaded hole and is provided with a locking screw rod which is matched with the threaded hole.
Furthermore, the number of the adjustable support frames is 4, and the adjustable support frames are respectively arranged at four corners of the horizontal bottom plate seat.
Furthermore, the horizontal baseplate seat and the mounting position of the adjustable support frame are respectively and vertically provided with an internal thread hole, the adjustable support frame comprises an adjusting rod and a support frame connected to the top of the adjusting rod, and the bottom of the adjusting rod is provided with an external thread and is in threaded connection with the internal thread hole of the horizontal baseplate seat.
Further, the heating tool is in an annular runway shape and comprises two straight pipes, bent pipes are arranged at the corresponding end portions of the two sides of the two straight pipes respectively, the inner sides of the straight pipes and the inner sides of the bent pipes are communicated with combustion burners respectively, and the outer sides of the middle portions of the straight pipes are connected with gas connecting pipe heads respectively.
Further, the extension welding rod is formed by connecting two welding rod units end to end.
Further, horizontal bottom plate seat is formed by thick 120mm steel sheet cutting process, the locking screw ejector pin is formed by the processing of diameter 60mm round bar, adjustable support rod is formed by the processing of diameter 20 mm's round bar and thick 20 mm's steel sheet, heating frock is formed by the processing of diameter 40 mm's round steel tube.
The invention relates to a 32MPa pump head liquid inlet and outlet valve box valve hole abrasion welding process, wherein a plurality of valve holes are arranged on a 32MPa pump head liquid inlet and outlet valve box, the 32MPa pump head liquid inlet and outlet valve box valve hole abrasion welding process is carried out by the 32MPa pump head liquid inlet and outlet valve box valve hole abrasion welding device in the technical scheme, firstly, the 32MPa pump head liquid inlet and outlet valve box is vertically arranged on a horizontal base plate and is locked by a locking device, and then, a heating tool is arranged on the periphery of the 32MPa pump head liquid inlet and outlet valve box by an adjustable support frame on the horizontal base plate seat, and the process comprises the following steps:
step one, preparing before welding;
1.1), welding equipment: digitally controlling inverse manual welding rod arc welding and argon arc welding and using a direct current welding machine, wherein the welding rod is an E5015 welding rod;
1.2), heating device: heating the tool;
1.3), auxiliary facilities: angle grinder, file, hammer, flat shovel, mask, sample plate, thermodetector, magnifier, and heat insulation cotton;
1.4), weldment material: body Z35# cast steel;
1.5) and the requirements of surfacing before welding are as follows: removing rust, grease and moisture by machining and cleaning the worn surface;
1.6), welding position: vertically overlaying the integral welding seam;
1.7), welding requirements: all welding layers must be free of any welding defects and fused to the base material;
1.8), welding process parameters: setting welding parameters according to welding equipment, welding materials, weldment materials and welding requirements;
step two, welding implementation;
2.1) preheating a liquid inlet and outlet valve box of the 32MPa pump head to 150-plus-200 ℃ from outside to inside through a heating tool, detecting the temperature of each valve hole through a temperature detector, synchronously utilizing three digital control inverter type manual welding rod electric arc welding and argon arc welding and respectively carrying out surfacing welding on the wear surfaces of the three valve holes from the bottom by a direct current welding machine after the temperature of a welding process is reached;
2.2) during welding, controlling the interlayer temperature of the welding seam to be not lower than the preheating temperature, and ensuring that the inner hole and the upper part of the surfacing layer have enough machining allowance after the integral surfacing is finished;
2.3) after all surfacing welding of the valve hole wearing surface is finished, performing 550-600 ℃ heat treatment for 6 hours from outside to inside through a heating tool, slowly cooling to 250 ℃ by adopting heat preservation cotton to wholly cover and cool to room temperature, detecting and detecting defects, machining a surfacing welding seam of the valve hole wearing surface, comparing by adopting a conforming sample plate, and recovering the use tolerance size.
Further, the welding equipment is a welding machine combining digital controlled inverse manual shielded metal arc welding and argon arc welding with models of HT400D or HT 500D.
Further, the surfacing layer is subjected to surfacing by using an E5015 welding rod with the diameter of 3.2mm, the welding current is 80-110A, the arc voltage is 23 +/-1V, and the welding speed is 15 +/-1 cm/min.
Furthermore, the lengthened welding rod is formed by connecting two welding rod units end to end, an E5015 welding rod with the diameter of 3.2mm is used as one welding rod unit, when the lengthened welding rod is adopted for surfacing, the welding current is 85A, a short arc and circular rod conveying method with the diameter of 3-4.5mm is adopted, and the welding rod and the surfacing layer form 90-degree right-angle surfacing.
Compared with the prior art, the 32MPa pump head liquid inlet and outlet valve box valve hole abrasion welding device is novel in design, reasonable in structure, convenient to obtain materials and manufacture and easy to operate, and the 32MPa pump head liquid inlet and outlet valve box can be vertically placed and fixed through the matching of the horizontal base plate seat and the locking device, so that the welding is convenient; the heating tool is arranged through the adjustable support frame, the preheating before welding and the heat treatment after welding can be effectively carried out on the liquid inlet and outlet valve box of the 32MPa pump head from outside to inside, and the heating tool can directly use gas, coal gas and the like in an enterprise, so that the device is convenient and practical; the device is matched with a welding method thereof, and the welding stress is eliminated by preheating at 150-; through lengthening welding rod electric arc welding, effectively solve the build-up welding restoration of 32MPa pump head liquid inlet and outlet valve case deep valve hole, when guaranteeing welding quality, investment cost is low, and field operation maintains conveniently, and repair time is short.
Drawings
FIG. 1 is a schematic structural diagram of a valve hole abrasion welding device of a liquid inlet and outlet valve box of a 32MPa pump head according to the invention;
FIG. 2 is a schematic sectional view of the liquid inlet and outlet valve box of the 32MPa pump head of the present invention;
FIG. 3 is a schematic structural view of a heating tool according to the present invention;
FIG. 4 is a schematic view of the extended electrode of the present invention;
in the figure: 1. a horizontal floor base; 2. an adjustable support frame; 21. adjusting a rod; 22. a support frame; 3. an ear mount; 4. locking the screw ejector rod; 5. heating the tool; 51. a straight pipe; 52. bending the pipe; 53. a burner tip; 54. a gas connector head; 6. a liquid inlet and outlet valve box of a 32MPa pump head; 61. a valve bore; 7. lengthening a welding rod; 71. and a welding rod unit.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this disclosure belongs. The terms "upper", "lower", "left", "right", "front", "rear", "inner", "outer", "lateral", "longitudinal", and the like used in the specification and claims of the present disclosure are used only to indicate relative positional relationships, and when the absolute position of a described object is changed, the relative positional relationship is also changed accordingly.
Example 1:
as shown in fig. 1, a 32MPa pump head liquid inlet and outlet valve box valve hole abrasion welding device comprises a welding machine and a horizontal base plate seat 1, wherein a lengthened welding rod 7 is arranged on the welding machine, because the inner wall hole of a valve hole 61 of a 32MPa pump head liquid inlet and outlet valve box 6 is phi 120mm, the depth can reach 420mm, and a traditional single welding rod extends into the valve hole 61 and cannot reach a bottom surfacing surface, therefore, the lengthened welding rod 7 is formed by welding two welding rod units 71 end to end, and each welding rod unit 71 is an independent welding rod; the horizontal base plate seat 1 is cuboid, the upper surface of the horizontal base plate seat is used for placing a 32MPa pump head liquid inlet and outlet valve box 6, locking devices are respectively arranged in four directions of the horizontal base plate seat, each locking device comprises a plurality of lug seats 3 which are respectively arranged on the peripheral edge of the upper part of the horizontal base plate seat 1, the center of each lug seat 3 is provided with a threaded hole and is provided with a locking screw rod 4 which is matched with the threaded hole, and the 32MPa pump head liquid inlet and outlet valve box 6 placed on the upper surface of the horizontal base plate seat 1 can be locked in four directions by rotating each locking screw rod 4 so as to be convenient for welding repair; still be provided with a plurality of adjustable support frame 2 on the horizontal bottom plate seat 1, adjustable support frame 2 is 4 generally, sets up four turnings departments at horizontal bottom plate seat 1 respectively, is provided with heating frock 5 on the adjustable support frame 2, and heating frock 5 is used for preheating before welding and postweld thermal treatment etc. when 32MPa pump head advances the valve hole 61 welding of flowing back valve box 6 and restores.
In this embodiment, for the heating position of adjustment heating frock 5 to 32MPa pump head liquid inlet and outlet valve case 6, horizontal bottom plate seat 1 is last to have vertically seted up the internal thread hole respectively with 2 mounted position punishment of adjustable support frame, adjustable support frame 2 is including adjusting pole 21 and connecting in the support frame 22 of adjusting pole 21 top, adjust pole 21 bottom be provided with the external screw thread and with horizontal bottom plate seat 1's internal thread hole threaded connection, through rotatory regulation pole 21, can adjust the height of adjusting pole 21 top support frame 22, and then realize the adjustment of heating frock 5 height.
In this embodiment, in order to comprehensively heat the periphery of the liquid inlet and outlet valve box 6 of the 32MPa pump head, the heating tool 5 is in the shape of an annular runway and comprises two straight pipes 51, bent pipes 52 are respectively arranged at the corresponding end parts of the two sides of the two straight pipes 51, the inner sides of the straight pipes 51 and the bent pipes 52 are respectively communicated with a burner 53, and the outer sides of the middle parts of the straight pipes 51 are respectively connected with a gas connector 54.
In this embodiment, horizontal bottom plate seat 1 is formed by thick 120mm steel sheet cutting process, locking screw ejector pin 4 is formed by the processing of diameter 60mm round bar, adjustable support rod 2 is formed by diameter 20 mm's round bar and thick 20 mm's steel sheet processing, heating frock 5 is formed by diameter 40 mm's circular steel tube processing.
During application, the horizontal base plate seat 1 is fixedly installed, the 32MPa pump head liquid inlet and outlet valve box 6 is vertically placed on the horizontal base plate seat 1, the vertically placed 32MPa pump head liquid inlet and outlet valve box 6 is locked and fixed through the locking screw ejector rods, the adjustable support frames 2 are installed, the height is adjusted, the heating tool 5 is installed, and finally the valve holes 61 are subjected to surfacing repair through the lengthened welding rods 7.
Example 2:
as shown in attached figures 1-4, the invention relates to a 32MPa pump head liquid inlet and outlet valve box valve hole abrasion welding process, wherein 3 valve holes 61 are arranged on a 32MPa pump head liquid inlet and outlet valve box 6, the valve holes 61 phi 120mm are about 420mm in depth, the process is carried out by a 32MPa pump head liquid inlet and outlet valve box valve hole abrasion welding device in embodiment 1, and the welding process route is as follows: installing and fixing a horizontal base plate seat 1, machining and cleaning a wear surface, preheating from outside to inside through a heating tool 5, lengthening a welding rod, overlaying welding from bottom to top, confirming a welding seam defect, examining and accepting the overlaying welding, carrying out postweld heat treatment, covering and slowly cooling by heat preservation cotton, machining, examining and accepting, and delivering for use.
The specific implementation method of the invention comprises the following steps: firstly, a 32MPa pump head liquid inlet and outlet valve box 6 is vertically placed on a horizontal base plate 1 and locked through a locking device, and then a heating tool 5 is arranged on the horizontal base plate 1 at the periphery of the 32MPa pump head liquid inlet and outlet valve box 6 through an adjustable support frame 2, wherein the process comprises the following steps:
step one, preparing before welding;
1.1), welding equipment: the model is HT400D or HT500D digital control inversion type manual shielded metal arc welding and argon arc welding are combined to use a direct current welding machine, the welding rod adopts a lengthened welding rod 7, and each lengthened welding rod 7 is formed by welding two E5015 welding rods with the diameter of 3.2mm as a welding rod unit 71 end to end;
1.2), heating device: heating the tool 5;
1.3), auxiliary facilities: angle grinder, file, hammer, flat shovel, mask, sample plate, thermodetector, magnifier, and heat insulation cotton;
1.4), weldment material: body Z35# cast steel;
1.5) and the requirements of surfacing before welding are as follows: removing rust, grease and moisture by machining and cleaning a wear surface, and preheating a valve hole 61 of a liquid inlet and outlet valve box 6 of a 32MPa pump head to 150-plus-200 ℃ by using a heating tool 5;
1.6), welding position: vertically overlaying the integral welding seam;
1.7), welding requirements: all welding layers must be free of any welding defects and fused to the base material;
1.8), welding process parameters: setting welding parameters according to welding equipment, welding materials, weldment materials and welding requirements;
welding process parameters
Step two, welding implementation;
2.1) preheating the liquid inlet and outlet valve box 6 of the 32MPa pump head from outside to inside to 150-phase 200 ℃ through the heating tool 5, detecting the temperature of each valve hole 61 through a temperature measuring instrument, synchronously utilizing three digital control inverse manual welding rod arc welding and argon arc welding and respectively carrying out surfacing welding on the wear surface of the three valve holes 61 from bottom to top by using a direct current welding machine after the temperature of a welding process is reached, thus being beneficial to reducing the thermal expansion and cold contraction stress and deformation of the integral liquid inlet and outlet valve box 6 of the 32MPa pump head and further preventing the concentration of hydrogen and cold cracks existing in a hardened tissue;
2.2) during normal welding, controlling the interlayer temperature of the welding seam to be not lower than the preheating temperature, and controlling the interlayer temperature of the welding seam to be not lower than the preheating temperature, wherein the lengthened welding rod 7 is not stable enough relative to a single welding rod unit 71, a circular-ring-shaped rod transporting method is adopted during surfacing, the lengthened welding rod 7 and the surfacing layer form 90-degree right-angle surfacing, the welding current can be preferably 85A, short arc (3-4.5mm) operation is adopted, the defects of air holes and the like of the surfacing layer are prevented, an inner hole is ensured to be 110mm phi after the integral surfacing is finished, in addition, the upper part of the surfacing layer is higher than the body, and therefore, sufficient allowance processing is facilitated;
2.3) and after all the wear surfaces of the valve holes 61 are subjected to surfacing welding, performing 550-600 ℃ heat treatment on the liquid inlet and outlet valve box 6 of the 32MPa pump head for 6 hours from outside to inside by using a heating tool 5 to eliminate welding stress, then performing whole covering cooling to room temperature by using heat insulation cotton when the temperature is slowly cooled to about 250 ℃, after detecting and detecting defects, machining the weld joints of the wear surfaces of the valve holes 61, comparing by using the first-made conforming sample plates, and recovering the use tolerance size.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope defined by the claims.
Claims (10)
1.32MPa pump head advances flowing back valve box valve opening wearing and tearing welding set, including the welding machine, its characterized in that: the horizontal base plate comprises a horizontal base plate seat (1), locking devices are arranged in four directions of the horizontal base plate seat (1), a plurality of adjustable supporting frames (2) are further arranged on the horizontal base plate seat (1), and heating tools (5) are arranged on the adjustable supporting frames (2); be provided with extension welding rod (7) on the welding machine, extension welding rod (7) are formed by two welding rod units (71) end to end connection.
2. A32 MPa pump head inlet and outlet valve box valve hole wear welding device according to claim 1, characterized in that: the horizontal bottom plate seat (1) is cuboid; the locking device comprises a plurality of lug seats (3) which are respectively arranged on the peripheral edges of the upper part of the horizontal base plate seat (1), and the center of each lug seat (3) is provided with a threaded hole and is provided with a locking screw ejector rod (4) which is matched with the threaded hole.
3. A 32MPa pump head inlet and outlet valve box valve bore wear weld assembly according to claim 1 or 2, wherein: the number of the adjustable supporting frames (2) is 4, and the adjustable supporting frames are respectively arranged at four corners of the horizontal base plate seat (1).
4. A32 MPa pump head inlet and outlet valve box valve bore wear welding device according to claim 3, characterized in that: the adjustable supporting frame comprises an adjusting rod (21) and a supporting frame (22) connected to the top of the adjusting rod (21), wherein the bottom of the adjusting rod (21) is provided with external threads and is in threaded connection with the internal thread hole of the horizontal bottom plate seat (1).
5. A32 MPa pump head inlet and outlet valve box valve hole wear welding device according to claim 4, characterized in that: the heating tool (5) is in an annular runway shape and comprises two straight pipes (51), bent pipes (52) are respectively arranged at the corresponding end parts of the two sides of the two straight pipes (51), combustion nozzles (53) are respectively communicated with the inner sides of the straight pipes (51) and the bent pipes (52), and gas connecting pipe heads (54) are respectively connected to the outer sides of the middle parts of the straight pipes (51).
6. A32 MPa pump head inlet and outlet valve box valve hole wear welding device according to claim 1, characterized in that: horizontal bottom plate seat (1) is formed by thick 120mm steel sheet cutting process, locking screw ejector pin (4) are formed by the processing of diameter 60mm pole, adjustable support rod (2) are formed by diameter 20 mm's pole and thick 20 mm's steel sheet processing, heating frock (5) are formed by diameter 40 mm's circular steel tube processing.
7.32MPa pump head advances flowing back valve box valve opening wearing and tearing welding process, 32MPa pump head advances to have a plurality of valve openings (61) on flowing back valve box (6), its characterized in that: the 32MPa pump head liquid inlet and outlet valve box valve hole abrasion welding device is carried out by the 32MPa pump head liquid inlet and outlet valve box valve hole abrasion welding device according to any one of claims 1-6, the 32MPa pump head liquid inlet and outlet valve box (6) is vertically placed on the horizontal base plate (1) and is locked through the locking device, then the heating tool (5) is arranged on the periphery of the 32MPa pump head liquid inlet and outlet valve box (6) through the adjustable support frame (2) on the horizontal base plate seat (1), and the process steps are as follows:
step one, preparing before welding;
1.1), welding equipment: digitally controlling inverse manual welding rod electric arc welding and argon arc welding and using a direct current welding machine, wherein the welding rod adopts an E5015 welding rod;
1.2), heating device: heating the tool (5);
1.3), auxiliary facilities: angle grinder, file, hammer, flat shovel, mask, sample plate, thermodetector, magnifier, and heat insulation cotton;
1.4), weldment material: body Z35# cast steel;
1.5) and the requirements of surfacing before welding are as follows: removing rust, grease and moisture by machining and cleaning the worn surface;
1.6), welding position: vertically overlaying the integral welding seam;
1.7), welding requirements: all welding layers must be free of any welding defects and fused to the base material;
1.8), welding process parameters: setting welding parameters according to welding equipment, welding materials, weldment materials and welding requirements;
step two, welding implementation;
2.1) preheating a liquid inlet and outlet valve box (6) of the 32MPa pump head to 150-plus-200 ℃ from outside to inside through a heating tool (5), detecting the temperature of each valve hole (61) through a thermodetector, synchronously utilizing three digital control inverse manual shielded metal arc welding and argon arc welding after the temperature of a welding process is reached, and respectively performing surfacing welding on the wear surfaces of the three valve holes (61) from the bottom by using a direct current welding machine;
2.2) during welding, controlling the interlayer temperature of the welding seam to be not lower than the preheating temperature, and ensuring that the inner hole and the upper part of the surfacing layer have enough machining allowance after the integral surfacing is finished;
2.3) and after all the wear surfaces of the valve holes (61) are subjected to surfacing welding, performing heat treatment at 550-600 ℃ for 6 hours from outside to inside through a heating tool (5), performing slow cooling to 250 ℃, integrally covering and cooling to room temperature by adopting heat-insulating cotton, detecting and detecting defects, machining the surfacing welding seams of the wear surfaces of the valve holes (61), comparing by adopting a conforming sample plate, and recovering the use tolerance size.
8. A32 MPa pump head inlet and outlet valve box valve bore wear welding process according to claim 7, wherein: the welding equipment is a welding machine combining digital control inversion type manual shielded metal arc welding and argon arc welding with the model number of HT400D or HT 500D.
9. A32 MPa pump head inlet and outlet valve box valve bore wear welding process according to claim 7, wherein: the surfacing layer is formed by adopting an E5015 welding rod with the diameter of 3.2mm for surfacing, the welding current is 80-110A, the arc voltage is 23 +/-1V, and the welding speed is 15 +/-1 cm/min.
10. A32 MPa pump head inlet and outlet valve box valve bore wear welding process according to claim 7, wherein: the lengthened welding rod (7) is formed by connecting two welding rod units (71) end to end, an E5015 welding rod with the diameter of 3.2mm is used as one welding rod unit (71), when the lengthened welding rod (7) is adopted for surfacing, the welding current is 85A, a short arc and circular strip conveying method with the diameter of 3-4.5mm is adopted, and the welding rod and a surfacing layer form 90-degree right-angle surfacing.
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2460257Y (en) * | 2001-01-05 | 2001-11-21 | 孙敦玉 | Lenthened welding rod with conducting point |
| KR20060031838A (en) * | 2006-03-25 | 2006-04-13 | 조호봉 | A moving electric preheating device |
| US20090289209A1 (en) * | 2008-05-01 | 2009-11-26 | Vecto Gray Inc. | Process For Hardfacing of Bore and Seat Face Intersection on Gate Valve |
| CN203371176U (en) * | 2013-07-05 | 2014-01-01 | 河南星火生物能源有限公司 | Welding rod lengthening connecting sleeve |
| CN109014518A (en) * | 2018-09-17 | 2018-12-18 | 安徽马钢设备检修有限公司 | A kind of train wheel die holder welder and renovation technique |
| CN111250824A (en) * | 2020-03-30 | 2020-06-09 | 安徽马钢设备检修有限公司 | Welding device and repair process for inner hole wear surface of upper cross beam of large hydraulic press |
| CN112935479A (en) * | 2021-03-25 | 2021-06-11 | 安徽马钢设备检修有限公司 | Welding device and repairing process for large wheel fixing table base fracture |
| CN112958881A (en) * | 2021-02-05 | 2021-06-15 | 安徽马钢设备检修有限公司 | Manual welding device and welding process for cracking of suspension type gear reducer box body |
| CN217394000U (en) * | 2022-04-20 | 2022-09-09 | 安徽马钢设备检修有限公司 | 32MPa pump head advances flowing back valve box valve opening wearing and tearing welding set |
-
2022
- 2022-04-20 CN CN202210418446.0A patent/CN114888399A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2460257Y (en) * | 2001-01-05 | 2001-11-21 | 孙敦玉 | Lenthened welding rod with conducting point |
| KR20060031838A (en) * | 2006-03-25 | 2006-04-13 | 조호봉 | A moving electric preheating device |
| US20090289209A1 (en) * | 2008-05-01 | 2009-11-26 | Vecto Gray Inc. | Process For Hardfacing of Bore and Seat Face Intersection on Gate Valve |
| CN203371176U (en) * | 2013-07-05 | 2014-01-01 | 河南星火生物能源有限公司 | Welding rod lengthening connecting sleeve |
| CN109014518A (en) * | 2018-09-17 | 2018-12-18 | 安徽马钢设备检修有限公司 | A kind of train wheel die holder welder and renovation technique |
| CN111250824A (en) * | 2020-03-30 | 2020-06-09 | 安徽马钢设备检修有限公司 | Welding device and repair process for inner hole wear surface of upper cross beam of large hydraulic press |
| CN112958881A (en) * | 2021-02-05 | 2021-06-15 | 安徽马钢设备检修有限公司 | Manual welding device and welding process for cracking of suspension type gear reducer box body |
| CN112935479A (en) * | 2021-03-25 | 2021-06-11 | 安徽马钢设备检修有限公司 | Welding device and repairing process for large wheel fixing table base fracture |
| CN217394000U (en) * | 2022-04-20 | 2022-09-09 | 安徽马钢设备检修有限公司 | 32MPa pump head advances flowing back valve box valve opening wearing and tearing welding set |
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Application publication date: 20220812 |