CN104209712A - Concrete conveying pipe, manufacturing method thereof and concrete pump truck - Google Patents
Concrete conveying pipe, manufacturing method thereof and concrete pump truck Download PDFInfo
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- CN104209712A CN104209712A CN201410497523.1A CN201410497523A CN104209712A CN 104209712 A CN104209712 A CN 104209712A CN 201410497523 A CN201410497523 A CN 201410497523A CN 104209712 A CN104209712 A CN 104209712A
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- delivery pipe
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- 238000004519 manufacturing process Methods 0.000 title abstract description 8
- 238000003466 welding Methods 0.000 claims abstract description 66
- 239000002356 single layer Substances 0.000 claims abstract description 63
- 239000010410 layer Substances 0.000 claims abstract description 61
- 238000010791 quenching Methods 0.000 claims abstract description 47
- 230000000171 quenching effect Effects 0.000 claims abstract description 30
- 229910000975 Carbon steel Inorganic materials 0.000 claims abstract description 10
- 239000010962 carbon steel Substances 0.000 claims abstract description 10
- 238000005520 cutting process Methods 0.000 claims abstract description 3
- 238000002360 preparation method Methods 0.000 claims description 13
- 238000000034 method Methods 0.000 description 16
- 239000000463 material Substances 0.000 description 10
- 230000000694 effects Effects 0.000 description 7
- 230000008569 process Effects 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 238000005507 spraying Methods 0.000 description 4
- 230000035807 sensation Effects 0.000 description 3
- 229910000967 As alloy Inorganic materials 0.000 description 2
- 239000011324 bead Substances 0.000 description 2
- 239000012809 cooling fluid Substances 0.000 description 2
- 238000005476 soldering Methods 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 241000233855 Orchidaceae Species 0.000 description 1
- -1 and wherein Substances 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
- B21C37/15—Making tubes of special shape; Making tube fittings
- B21C37/154—Making multi-wall tubes
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/18—Hardening; Quenching with or without subsequent tempering
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/08—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for tubular bodies or pipes
- C21D9/085—Cooling or quenching
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L23/00—Flanged joints
- F16L23/02—Flanged joints the flanges being connected by members tensioned axially
- F16L23/024—Flanged joints the flanges being connected by members tensioned axially characterised by how the flanges are joined to, or form an extension of, the pipes
- F16L23/026—Flanged joints the flanges being connected by members tensioned axially characterised by how the flanges are joined to, or form an extension of, the pipes by welding
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L9/00—Rigid pipes
- F16L9/02—Rigid pipes of metal
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
Abstract
The invention provides a concrete conveying pipe, a manufacturing method thereof and a concrete pump truck. The manufacturing method of the concrete conveying pipe comprises the following steps: blanking: cutting a single-layer pipe and a double-layer pipe with preset lengths, wherein the single-layer pipe is a quenchable pipe, an inner pipe layer of the double-layer pipe is a quenchable layer, and an outer pipe layer of the double-layer pipe is a carbon steel layer; welding the single-layer pipe and the double-layer pipe: welding the single-layer pipe and the double-layer pipe into an integral pipe by butt welding, wherein at least one end of the integral pipe is the double-layer pipe; quenching: and carrying out quenching treatment on the inner wall of the integrated pipe. The concrete conveying pipe with long service life and high stability can be manufactured by the manufacturing method of the concrete conveying pipe.
Description
Technical field
The present invention relates to concrete transporting equipment technical field, more specifically, relate to a kind of concrete delivery pipe and preparation method thereof, concrete mixer.
Background technology
Concrete delivery pipe is because of its severe working environment, and concrete delivery pipe must have good wearability and meet certain pressure requirements.The selection of material, the reasonably design of technique and fitting structure become the three large principal elements affecting concrete conveyance tube lifetime.Usual employing steel alloy inwall quenching, promotes hardness and reaches the effect improving the life-span.
In the prior art, the straight-tube portion of concrete mixer point can be divided into " individual layer straight tube " and " double-deck straight tube " two large class from structure:
Fig. 1 shows the structure of individual layer straight tube, in this individual layer straight tube, to harden certain degree of depth to its inwall, and the outer certain thickness that keeps does not harden, and both can keep the wearability of inwall, can ensure certain bearing capacity again.One-course concrete conveying straight tube is made up of " flange 1 ", " wear-resistant sleeve 2 ", " body 3 " three parts, and wear-resistant sleeve 2 generally adopts the good material of wearability, such as rich chromium cast iron; But " body 3 " must meet " wear-resisting ", " pressure-bearing " and " being welded to connect " three partial function requirement simultaneously.And existing individual layer straight pipe technology is: Pipe Cutting-welding method orchid-quenching-gland, wearability is realized by body quenching technical, bearing requirements is then ensure by controlling depth of hardening, welding performance is then that material itself determines, and the performance of welding region and hardened area influences each other, usually attend to one thing and lose sight of another, be difficult to control.Therefore the material selection range of individual layer straight tube is narrow, although advantage of lower cost, be difficult to reach the very high life.
Double-deck straight tube, ectonexine material is different, and the outer material adopting non-hardenable, internal layer all hardens.Existing double-deck straight pipe technology is: quenching-Pipe Cutting-welding method orchid (overlapping precompressed), cost is higher.
Shown in Figure 2, the sectional view of the complete corresponding circle of sensation 4 of individual layer straight tube welding after upper flange 1, welding heat affected zone 5 and quench hardened case 6 has been shown in Fig. 2.Can know according to above-mentioned prior art, on mono-layer tube welded flange engineering in, the heat affected area 5 of welding (fillet welding) can make the tissue of pipe fitting change, and concrete impact shows as welding heat affected zone 5 and is difficult to quenching, causes weld quench hardened case 6 degree of depth inadequate; If deliberately strengthen quenching power, be then difficult to control weld depth of hardening, if quench hardened case is excessively dark, weld easily ruptures, and has a strong impact on the stability of pipe fitting performance.So, must to reduce the stability (weld does not rupture) that the pipe fitting life-span (reduction depth of hardening) exchanges performance for.Under normal circumstances, individual layer straight tube cannot reach the higher life-span.And double-deck straight tube cost is high, the market share is little.
Summary of the invention
The present invention aims to provide a kind of concrete delivery pipe and preparation method thereof, concrete mixer, to solve the problem that concrete delivery pipe cost of the prior art is high, service life is low.
For solving the problems of the technologies described above, according to an aspect of the present invention, a kind of concrete delivery pipe preparation method is provided, comprise: blanking step: the mono-layer tube of cutting predetermined length and bimetallic tube, wherein, mono-layer tube is hardenable pipe, the interior tube layer of bimetallic tube is hardenable layer, and external tube layer is carbon steel layer; Single bimetallic tube welding step: utilize butt welding mono-layer tube and bimetallic tube to be welded as a whole pipe, and at least one end of integral tube is bimetallic tube; Quenching Step: Quenching Treatment is carried out to the inwall of integral tube.
Further, in blanking step, the perpendicularity of the end face of mono-layer tube and the axis of mono-layer tube is not more than ± 0.5, and the end face of bimetallic tube and the perpendicularity of bimetallic tube axis be not more than ± and 0.5.
Further, at the welding position place of mono-layer tube and bimetallic tube, the inwall of integral tube has annulus.
Further, after quenching Step, flange welding step is also comprised: adopt fillet welding adpting flange to be welded on the end of integral tube; Adpting flange comprises: the first flange, and the first flange is set in the first end of integral tube, and is welded on integral tube; Second flange, the second flange sleeve is located at the second end of integral tube, and is welded on integral tube.
Further, concrete delivery pipe also comprises: two the first wear-resistant sleeves, and one of two first wear-resistant sleeves to be embedded in the through hole of the first flange and to dock with integral tube, and another to be embedded in the through hole of the second flange and to dock with integral tube.
Further, concrete delivery pipe also comprises: the second wear-resistant sleeve, and the second wear-resistant sleeve to be embedded in the through hole of the first flange and to dock with integral tube; Wherein, integral tube comprises one section of bimetallic tube and one section of mono-layer tube, and the first flange is arranged near bimetallic tube.
Further, integral tube comprises two sections of bimetallic tubes and one section of mono-layer tube, and two sections of bimetallic tubes are welded on first end and second end of mono-layer tube respectively.
According to a further aspect in the invention, provide a kind of concrete delivery pipe, this concrete delivery pipe comprises: mono-layer tube, and mono-layer tube is inwall quenching pipe; Bimetallic tube, bimetallic tube comprises interior tube layer and external tube layer, and interior tube layer is quench hardened case, and external tube layer is carbon steel layer; Wherein, mono-layer tube and bimetallic tube to be connected to form one pipe by butt weld.
Further, concrete delivery pipe also comprises: adpting flange, and adpting flange is fixedly connected on the end of integral tube by angle welding;
Adpting flange comprises: the first flange, and the first flange is set in the first end of integral tube, and is welded on integral tube; Second flange, the second flange sleeve is located at the second end of integral tube, and is welded on integral tube.
Further, concrete delivery pipe also comprises: integral tube comprises one section of bimetallic tube and one section of mono-layer tube, and the first flange is arranged near bimetallic tube.
In accordance with a further aspect of the present invention, provide a kind of concrete mixer, comprise concrete delivery pipe, concrete delivery pipe is above-mentioned concrete delivery pipe.
Apply technical scheme of the present invention, first blanking step is carried out, in blanking step, mono-layer tube and bimetallic tube are cut into predetermined length according to the duty requirements of reality, severe duty requirements is met in order to enable concrete conveying pipe of the present invention, mono-layer tube in the present invention is hardenable pipe, such as alloy pipe; Similarly, the interior tube layer of bimetallic tube is hardenable layer, and external tube layer is common carbon steel layer.Secondly, carry out single bimetallic tube welding step, in this step, butt welding is utilized mono-layer tube and bimetallic tube to be welded as a whole pipe, for the mode of fillet welding in prior art, welding heat affected much smaller to mono-layer tube of butt welding in the present invention, at least one end of integral tube is bimetallic tube, in use procedure, the end with bimetallic tube of integral tube is set to the charging aperture of concrete delivery pipe, the duty requirements that the charging aperture of concrete delivery pipe is more severe can be met, improve the service life of whole carrier pipe.Again, carry out quenching Step, in this step, carry out Quenching Treatment to the inwall being welded the integral tube formed by mono-layer tube and bimetallic tube, after Quenching Treatment, the hardenable layer of bimetallic tube forms the first quench hardened case, the inwall of the hardenable pipe of individual layer forms the second quench hardened case, and the hardness of the first quench hardened case is greater than the hardness of the second quench hardened case, the wearability of integral tube can not only be improved, the uniformity that whole body lost efficacy can also be ensured.External tube layer due to bimetallic tube is carbon steel layer, for the material that can not harden, in welding process, even if prevent interior pipe to be annealed in the inwall spray cooling fluid of integral tube, weld seam between outer tube and flange also not easily produces cold crack, can not welding seam breaking be caused, improve the service life of concrete delivery pipe further.And mono-layer tube is by Effect of Materials, if carry out water-spraying control during fillet welding, commissure will be made to be hardened, weld seam is easily cracked, produce potential safety hazard, therefore the anti-wear performance of mono-layer tube and flanged ends can be affected, but be not easily worn because it is in the concrete port of export, the bulk life time of pipe fitting can not be affected.
Accompanying drawing explanation
The accompanying drawing forming a application's part is used to provide a further understanding of the present invention, and schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 diagrammatically illustrates the sectional view of existing concrete delivery pipe;
Fig. 2 schematically show try hard to 1 the partial enlarged drawing in P region;
Fig. 3 diagrammatically illustrates the sectional view of concrete delivery pipe of the present invention; And
Fig. 4 diagrammatically illustrates the partial enlarged drawing in the M region of Fig. 2.
Description of reference numerals: 10, the first flange; 20, the second flange; 30, mono-layer tube; 40, bimetallic tube; 50, the first wear-resistant sleeve; 60, complete corresponding circle of sensation; 70, quench hardened case; 80, welding heat affected zone.
Detailed description of the invention
Below in conjunction with accompanying drawing, embodiments of the invention are described in detail, but the multitude of different ways that the present invention can be defined by the claims and cover is implemented.
Shown in Fig. 3 and Fig. 4, according to an embodiment of the present, a kind of concrete delivery pipe preparation method is provided.The method comprises blanking step, single bimetallic tube welding step, quenching Step and flange welding step successively.First blanking step is carried out, in blanking step, mono-layer tube 30 and bimetallic tube 40 are cut into predetermined length according to the duty requirements of reality, severe duty requirements is met in order to enable the concrete conveying pipe of the present embodiment, mono-layer tube 30 in the present embodiment is hardenable pipe, such as alloy pipe; Similarly, the interior tube layer of bimetallic tube 40 is hardenable layer, such as Q57, and external tube layer is common carbon steel layer, such as Q345B.
Secondly, carry out single bimetallic tube welding step, in this step, butt welding is utilized mono-layer tube 30 and bimetallic tube 40 to be welded as a whole pipe, can be known by a large amount of experimental verifications: for the mode of fillet welding in prior art, welding heat affected much smaller to mono-layer tube of the butt welding in the present invention.At least one end of integral tube is bimetallic tube 40, in use procedure, the end with bimetallic tube 40 of integral tube is set to the charging aperture of concrete delivery pipe, the duty requirements that the charging aperture of concrete delivery pipe is more severe can be met, improve the service life of whole carrier pipe.
Again, carry out quenching Step, in this step, carry out Quenching Treatment to the inwall being welded the integral tube formed by mono-layer tube 30 and bimetallic tube 40, after Quenching Treatment, the hardenable layer of bimetallic tube forms the first quench hardened case, the inwall of the hardenable pipe of individual layer forms the second quench hardened case, and the hardness of the first quench hardened case is greater than the hardness of the second quench hardened case, the wearability of integral tube can not only be improved, the uniformity that whole body lost efficacy can also be ensured.
4th, carry out flange welding step, in flange welding step, fillet welding is adopted adpting flange to be welded on the end of integral tube, in the process that adpting flange and integral tube are welded together, the welding position of adpting flange and integral tube is positioned on the external tube layer of bimetallic tube 40, carries out water-spraying control when bimetallic tube 40 and flange carry out fillet welding simultaneously, ensures that in bimetallic tube 40, tube layer hardness does not affect by welding.External tube layer due to bimetallic tube 40 is carbon steel layer, for the material that can not harden, in welding process, even if prevent interior pipe to be annealed in the inwall spray cooling fluid of integral tube, weld seam between outer tube and flange also not easily produces cold crack, can not welding seam breaking be caused, improve the service life of concrete delivery pipe further.And mono-layer tube is by Effect of Materials, if carry out water-spraying control during fillet welding, commissure will be made to be hardened, weld seam is easily cracked, produces potential safety hazard.Do not carry out water-spraying control when mono-layer tube of the present invention welds with one end of Flange joint, the anti-wear performance of commissure can be affected, but is not easily worn because it is in the concrete port of export, can not affect the bulk life time of pipe fitting.
Shown in Figure 4, Fig. 4 shows the sectional view of the complete corresponding circle of sensation 4 of the mono-layer tube 30 of the present embodiment and bimetallic tube 40 butt welding position, welding heat affected zone 5 and quench hardened case 6.According to method of the present invention, because the soldering reliability of " butt welding " is better than " fillet welding ", under same strength condition, butt welding can be carried out by less voltage, electric current, less weld bead height, by mono-layer tube 30 and the integrally welded structure of bimetallic tube 40, reduce the size of welding heat affected zone 80, thus reduce mono-layer tube 30 and the impact of welding " quenching " of bimetallic tube 40, improve the service life of concrete delivery pipe.
Due to, pipe fitting end because heat concentrates the depth of hardening that can cause end to increase, this effect is claimed to be " end effect of quenching ".In order to be formed " end effect of quenching ", in the position of welding of mono-layer tube 30 with bimetallic tube 40, the inwall of integral tube has annulus, that is, mono-layer tube 30 does not fuse completely with the interface of bimetallic tube 40, can produce in quenching process " quenching end effect ", thus make up the depth of hardening deficiency because mono-layer tube 30 and bimetallic tube 40 weld and cause, what make whole high concrete carrier pipe can meet bearing requirements.
Preferably, in blanking step, the perpendicularity of the end face of mono-layer tube 30 and the axis of mono-layer tube 30 is not more than ± and 0.5, the end face of bimetallic tube 40 and the perpendicularity of bimetallic tube 40 axis be not more than ± and 0.5, avoid mono-layer tube 30 and bimetallic tube 40 to occur welding curved situation in the process of welding, ensure the stability of concrete delivery pipe.
Refer again to shown in Fig. 3, the adpting flange in the present embodiment comprises the first flange 10 and the second flange 20, and wherein, the first flange 10 is set in the first end of integral tube, and is welded on integral tube; Second flange 20 is set in the second end of integral tube, and is welded on integral tube, is convenient to be connected to by integral tube on concrete mixer carry out concrete transport.
In an embodiment of the present invention, in order to the service life of concrete delivery pipe can be improved further, the concrete delivery pipe of the present embodiment also comprises two the first wear-resistant sleeves 50, one of these two first wear-resistant sleeves 50 to be embedded in the through hole of the first flange 10 and to dock with integral tube, and another to be embedded in the through hole of the second flange 20 and to dock with integral tube.By arranging the first wear-resistant sleeve 50 in the inside of the first flange 10 and the second flange 20, concrete friction first flange 10 and the second flange 20 can be avoided, improving the service life of concrete conveying pipe.
When in use, for concrete operating mode, integral tube can also be set to different structures, when operating mode is more severe, integral tube comprises two sections of bimetallic tubes 40 and one section of mono-layer tube 30, two sections of bimetallic tubes 40 are welded on first end and second end of mono-layer tube 30 respectively, and now, adpting flange is welded on bimetallic tube 40, the wearability of concrete delivery pipe can be improved further, ensure the service life of high concrete carrier pipe.In addition, in the present embodiment, adpting flange is being welded on bimetallic tube 40, is ensureing can implement at flange the technique of welding afterwards of first quenching, ensureing the impact that adpting flange fillet welding district is not welded.
Under normal circumstances, the operating mode of the arrival end of concrete delivery pipe is more severe than the operating mode of the port of export, in order to reduce the production cost of whole high concrete carrier pipe, in the unshowned embodiment of one of the present invention, concrete delivery pipe also comprises the second wear-resistant sleeve, second wear-resistant sleeve to be embedded in the through hole of the first flange 10 and to dock with integral tube, first flange 10 is arranged on the one end near bimetallic tube 40, in use procedure, to one end of bimetallic tube 40 be provided with as concrete entrance point, friction suffered by it is greater than concrete outlet, therefore, it lost efficacy first and the port of export of high concrete carrier pipe, in order to cost-saving, the integral tube of the present embodiment comprises one section of bimetallic tube 40 and one section of mono-layer tube 30, and the wearing layer of integral tube second end can be saved.That is, the high concrete carrier pipe of the present embodiment can save the manufacturing cost of high concrete carrier pipe while the service life ensureing high concrete carrier pipe, and structure is simple, is convenient to realize.
According to a further aspect in the invention, provide a kind of concrete delivery pipe, the concrete delivery pipe of the present embodiment is be made by above-mentioned concrete delivery pipe preparation method.Concrete delivery pipe in the present embodiment comprises mono-layer tube 30, bimetallic tube 40 and adpting flange.Wherein, mono-layer tube 30 is quenching pipe; Bimetallic tube 40 comprises interior tube layer and external tube layer, and interior tube layer is quench hardened case, and external tube layer is carbon steel layer, and wherein, mono-layer tube 30 and bimetallic tube 40 form integral tube by butt weld; Adpting flange is weldingly fixed on integral tube.In use procedure, the end of bimetallic tube 40 is set to the entrance point of concrete delivery pipe, the duty requirements that concrete charging is more severe can be met, improve whole carrier pipe service life quenching pipe and quench hardened case can improve the hardness of integral tube, the wearability of integral tube can be improved.According to the present invention, because the soldering reliability of " butt weld " is better than " angle welding ", under same strength condition, butt weld can be formed with less voltage, electric current, the welding of less weld bead height, reduce the size of welding heat affected zone, thus reduce mono-layer tube 30 and the impact of welding " quenching " of bimetallic tube 40, improve the service life of concrete delivery pipe.
Concrete delivery pipe in the present embodiment also comprises adpting flange, and adpting flange is fixedly connected on the end of described integral tube by angle welding.Adpting flange comprises the first flange 10 and the second flange 20, and wherein, the first flange 10 is set in the first end of integral tube, and is welded on integral tube; Second flange 20 is set in the second end of integral tube, and is welded on integral tube, is convenient to be connected to by integral tube on pump truck carry out concrete transport.
Under normal circumstances, the operating mode of the arrival end of concrete delivery pipe is more severe than the operating mode of the port of export, in order to reduce the production cost of whole high concrete carrier pipe, in the unshowned embodiment of one of the present invention, concrete delivery pipe also comprises the second wear-resistant sleeve, second wear-resistant sleeve to be embedded in the through hole of the first flange 10 and to dock with integral tube, first flange 10 is arranged on the one end near bimetallic tube 40, in use procedure, to one end of bimetallic tube 40 be provided with as concrete entrance point, friction suffered by it is large, therefore, it lost efficacy first and the port of export of high concrete carrier pipe, in order to cost-saving, the integral tube of the present embodiment comprises one section of bimetallic tube 40 and one section of mono-layer tube 30, and the wearing layer of integral tube second end can be saved.That is, the high concrete carrier pipe of the present embodiment can save the manufacturing cost of high concrete carrier pipe while the service life ensureing high concrete carrier pipe, and structure is simple, is convenient to realize.
In accordance with a further aspect of the present invention, provide a kind of concrete mixer, comprise concrete delivery pipe, the concrete delivery pipe that concrete delivery pipe is above-mentioned.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (11)
1. a concrete delivery pipe preparation method, is characterized in that, comprising:
Blanking step: the mono-layer tube (30) of cutting predetermined length and bimetallic tube (40), wherein, described mono-layer tube (30) is hardenable pipe, and the interior tube layer of described bimetallic tube (40) is hardenable layer, and external tube layer is carbon steel layer;
Single bimetallic tube welding step: utilize butt welding described mono-layer tube (30) and described bimetallic tube (40) to be welded as a whole pipe, and at least one end of described integral tube is described bimetallic tube (40);
Quenching Step: Quenching Treatment is carried out to the inwall of described integral tube.
2. concrete delivery pipe preparation method according to claim 1, it is characterized in that, in described blanking step, the perpendicularity of the end face of described mono-layer tube (30) and the axis of described mono-layer tube (30) is not more than ± and 0.5, the end face of described bimetallic tube (40) and the perpendicularity of described bimetallic tube (40) axis be not more than ± and 0.5.
3. concrete delivery pipe preparation method according to claim 1, is characterized in that, at the welding position place of described mono-layer tube (30) with described bimetallic tube (40), the inwall of described integral tube has annulus.
4. concrete delivery pipe preparation method according to claim 1, is characterized in that, after described quenching Step, also comprise flange welding step: adopt fillet welding adpting flange to be welded on the end of described integral tube;
Described adpting flange comprises:
First flange (10), described first flange (10) is set in the first end of described integral tube, and is welded on described integral tube;
Second flange (20), described second flange (20) is set in the second end of described integral tube, and is welded on described integral tube.
5. concrete delivery pipe preparation method according to claim 4, is characterized in that, described concrete delivery pipe also comprises:
Two the first wear-resistant sleeves (50), one of described two first wear-resistant sleeves (50) to be embedded in the through hole of described first flange (10) and to dock with described integral tube, and another to be embedded in the through hole of described second flange (20) and to dock with described integral tube.
6. concrete delivery pipe preparation method according to claim 4, is characterized in that, described concrete delivery pipe also comprises:
Second wear-resistant sleeve, described second wear-resistant sleeve to be embedded in the through hole of described first flange (10) and to dock with described integral tube; Wherein,
Described integral tube comprises one section of described bimetallic tube (40) and one section of described mono-layer tube (30), and described first flange (10) is arranged near described bimetallic tube (40).
7. concrete delivery pipe preparation method according to claim 1, it is characterized in that, described integral tube comprises two sections of described bimetallic tubes (40) and one section of described mono-layer tube (30), and described two sections of bimetallic tubes (40) are welded on first end and second end of described mono-layer tube (30) respectively.
8. a concrete delivery pipe, is characterized in that, described concrete delivery pipe comprises:
Mono-layer tube (30), described mono-layer tube (30) is inwall quenching pipe;
Bimetallic tube (40), described bimetallic tube (40) comprises interior tube layer and external tube layer, and described interior tube layer is quench hardened case, and described external tube layer is carbon steel layer; Wherein, described mono-layer tube (30) and described bimetallic tube (40) to be connected to form one pipe by butt weld.
9. concrete delivery pipe according to claim 8, is characterized in that, described concrete delivery pipe also comprises:
Adpting flange, described adpting flange is fixedly connected on the end of described integral tube by angle welding;
Described adpting flange comprises:
First flange (10), described first flange (10) is set in the first end of described integral tube, and is welded on described integral tube;
Second flange (20), described second flange (20) is set in the second end of described integral tube, and is welded on described integral tube.
10. concrete delivery pipe according to claim 9, is characterized in that, described concrete delivery pipe also comprises:
Described integral tube comprises one section of described bimetallic tube (40) and one section of described mono-layer tube (30), and described first flange (10) is arranged near described bimetallic tube (40).
11. 1 kinds of concrete mixers, comprise concrete delivery pipe, it is characterized in that, the concrete delivery pipe of described concrete delivery pipe according to any one of claim 8 to 10.
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| CN201410497523.1A CN104209712B (en) | 2014-09-24 | 2014-09-24 | Concrete conveying pipe, manufacturing method thereof and concrete pump truck |
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| CN201410497523.1A CN104209712B (en) | 2014-09-24 | 2014-09-24 | Concrete conveying pipe, manufacturing method thereof and concrete pump truck |
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| CN104209712B CN104209712B (en) | 2016-08-24 |
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| CN105234633A (en) * | 2015-10-21 | 2016-01-13 | 无锡阳工机械制造有限公司 | Pump pipe machining technology |
| CN110715117A (en) * | 2019-09-10 | 2020-01-21 | 中联重科股份有限公司 | Concrete conveying pipe and manufacturing method thereof |
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| Publication number | Publication date |
|---|---|
| CN104209712B (en) | 2016-08-24 |
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