CN103256433A - Composite pumper cantilever crane conveying pipe and processing technique thereof - Google Patents
Composite pumper cantilever crane conveying pipe and processing technique thereof Download PDFInfo
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- CN103256433A CN103256433A CN2013100890672A CN201310089067A CN103256433A CN 103256433 A CN103256433 A CN 103256433A CN 2013100890672 A CN2013100890672 A CN 2013100890672A CN 201310089067 A CN201310089067 A CN 201310089067A CN 103256433 A CN103256433 A CN 103256433A
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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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- 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
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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Abstract
The invention relates to a composite pumper cantilever crane conveying pipe which comprises an inner wall pipe and an outer protective sleeve pipe. The inner wall pipe is a high-carbon low-alloy-steel high-frequency longitudinal welded pipe made of LZN materials. The outer protective sleeve pipe is a longitudinal welded pipe made of LZW materials. The inner wall pipe is mounted in the outer protective sleeve pipe in a sleeved manner to be integrated with the same. A processing technique of the composite pumper cantilever crane conveying pipe includes producing the outer protective sleeve pipe and the inner wall pipe, mounting the outer protective sleeve pipe and the inner wall pipe in a sleeved manner, and performing hole shrinkage combination and heat treatment to the outer protective sleeve pipe and the inner wall pipe. The inner wall pipe has high strength and wear-resistant performance, and the outer protective sleeve pipe has good flexibility, so that service life of the cantilever crane conveying pipe can be effectively prolonged and conveying cost can be reduced; and the high-carbon steel welding technique of the cantilever crane conveying pipe stays ahead in China and has high creativity.
Description
Technical field
The invention belongs to concrete conveying pipe and manufacture field, particularly a kind of compound pumping vehicle arm rack delivery pipe and processing technology thereof.
Background technique
The concrete pump truck arm delivery pipe mainly is the conveying for materials such as concrete.Concrete conveying operation has characteristics such as flow velocity is fast, flow is big, and conveying material constantly produces injuries such as bigger impact, wearing and tearing, corrosion to tube wall, and it is tired until being worn through gradually to cause pipeline very easily to take place.Traditional pumping vehicle arm rack delivery pipe adopts weldless tube more, although weldless tube technology is also being updated, but the wall thickness that its single piercing process forms is irregular, when drawing, still be difficult to eliminate, so when establishing criteria calculates the allowable stress limit, can only press minimum wall thickness (MINI W.) and calculate, in use will scrap when the thinnest part whole pipe that be worn through, this causes the waste of metallic material undoubtedly.The weldless tube of producing in addition is in order to improve the wear resistance of inwall, Quenching Treatment need be carried out, and when improving delivery pipe inwall wear resistance through quenching technical, the overall flexibility of delivery pipe can be reduced again, increased the friability of delivery pipe, delivery pipe is fractureed easily and ftractureed; If improve working life, reduce the frequency of changing delivery pipe with the wall thickness that increases delivery pipe, can strengthen the weight of engineering machinery jib undoubtedly, when delivering concrete mud, be very easy to make the jib overload, can cause jib to support fracture or jib side plate problems of crack when serious, cause security incident.If frequently change delivery pipe, influence the efficient that concrete is carried on the one hand, also can increase the cost that concrete is carried on the other hand.Patent discloses a kind of highly wear-resisting alloy steel rubber outer protection shockproof energy saving pump tube No. 200810127980, and this pump line inwall is alloyed steel, the cost height, outer wall is the rubber outer protection pipe, need pass through operations such as encapsulate, sulfuration again, not only will increase large number quipments, and complex manufacturing.Actual use condition at present construction industry, for the quality that improves the pumping vehicle arm rack delivery pipe is intensity and wear resistance, improve transfer efficiency, reduce and carry cost, my company has developed a kind of novel high strength, the compound pumping vehicle arm rack delivery pipe of high abrasion, this product adopts the design concept of bimetal pipe, inner wall tube is selected carbon content and the high high-carbon low-alloy steel tubulation of carbon equivalent for use, the oversheath pipe is selected the higher low-alloy structural steel tubulation of good toughness intensity for use, adopt special process to combine closely inner wall tube and oversheath pipe, in guaranteeing pipe and outer tube in conjunction with precision, reduce the slit of junction plane, reduce impact endurance test shock, gain in strength and wear resistance, reduce production costs, thereby prolong the working life of pumping vehicle arm rack delivery pipe, improve transfer efficiency, reduce and carry cost.In the manufacturing of bimetal pipe, the most key is the production of high-carbon low-alloy, high strength, high abrasion inner wall tube, adopts the conventional production technology of present low carbon steel welding to finish.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art, provide that a kind of good physical performance, using effect are good, long service life, lower-cost compound pumping vehicle arm rack delivery pipe and processing technology thereof.
The present invention solves its technical problem and is achieved through the following technical solutions:
A kind of compound pumping vehicle arm rack delivery pipe, it is characterized in that: constituted by inner wall tube and oversheath pipe, described inner wall tube is LZN material high-carbon low-alloy steel high-frequency straight seam welded pipe, and described oversheath pipe is LZW material high-frequency straight seam welded pipe, and inner wall tube is set in the oversheath pipe and is combined as a whole.
The processing method of the described compound pumping vehicle arm rack delivery pipe of a kind of claim 1 is characterized in that: steps of the method are:
⑴. produce the oversheath pipe:
Adopting LZW material sheet metal is raw material, makes LZW material high-frequency straight seam welded pipe with high-frequency welding manner;
⑵. produce inner wall tube:
Adopt LZN material high-carbon low-alloy steel, make LZN material high-carbon low-alloy steel high-frequency straight seam welded pipe with high-frequency welding manner;
⑶. the suit of oversheath pipe and inner wall tube:
Inner wall tube is threaded onto oversheath pipe inside;
⑷. the oversheath pipe is combined with the inner wall tube undergauge:
Oversheath pipe after utilizing aligning undergauge device to suit is aligned undergauge, and oversheath pipe and inner wall tube are closely as one;
⑸. heat treatment:
The inner wall tube and the oversheath pipe that are combined as a whole are heat-treated, and the hardness of inner wall tube is not less than HRC60 after treatment.
And described compound pumping vehicle arm rack delivery pipe processing method is characterized in that: produce inner wall tube among the described step ⑵ and comprise the steps:
1.. raw material is chosen:
Selecting carbon content is the inner wall tube raw material at 0.58～0.68% carbon and low-alloy steel band steel;
2.. moulding is prepared:
To LZN high-carbon low-alloy steel band steel test, slitting, sheared edge reconditioning, the check of band steel, uncoiling, leveling, shearing butt joint;
3.. moulding:
Adopt the forming roll group that the band steel is carried out moulding, make it be shaped to the tubular pipe;
4.. high frequency welding:
Adopt high-frequency welding manner with step 3. in the tubular pipe of moulding be welded into LZN high-carbon low-alloy steel welded tube;
5.. intermediate frequency normalizing heat treatment:
Utilize the linear induction heater that LZN high-carbon low-alloy steel welded tube is carried out intermediate frequency normalizing heat treatment;
6.. air cooling, water-cooled:
LZN high-carbon low-alloy steel welded tube enters in the water-cooled case below the air cooling to 350 ℃ after intermediate frequency normalizing heat treatment, and the body temperature reaches about 70 ℃ after the water-cooled.
7.. sizing, aligning, sawing, tack;
Cooled LZN high-carbon low-alloy steel welded tube is carried out sizing, aligning, sawing and tack successively to be handled
8.. the hydrostatic test:
Utilize hydraulic press that LZN high-carbon low-alloy steel welded tube is carried out pressure test.
And described compound pumping vehicle arm rack delivery pipe processing method is characterized in that:
Described LZN high-carbon low-alloy steel raw material has following chemical composition:
| C | Si | Mn | P | S | Cr | Cu | Nb | V | Ti | Ni |
| 0.62 | 0.21 | 1.05 | 0.012 | 0.003 | 0.31 | 0.01 | 0.02 | 0.03 | 0.014 | 0.02 |
。
And described step is 4.. its processing parameter of high frequency welding is:
High frequency power: 186-234KW, frequency: 298-302KHZ, welding speed: 21-24m/min, heating in medium frequency temperature: 830-880 ℃, go out the horizontal dimension behind the squeezing roll: 128.9mm, go out the vertical dimension behind the squeezing roll: 129.5mm.
Advantage of the present invention and beneficial effect are:
1. the compound pumping vehicle arm rack delivery pipe of the present invention inner wall tube intensity high wear resistance height, oversheath pipe flexibility is good, and overall physical properties is good, using effect is good, long service life, can effectively reduce the conveying cost;
2. the compound pumping vehicle arm rack delivery pipe of the present invention processing method can take full advantage of existing equipment, need not to increase large number quipments, and the craft science advanced person can realize the high frequency welding of high carbon steel raw material, and the high carbon steel welding technique is located the leading position at home.
3. the compound pumping vehicle arm rack pipe structure of the present invention is scientific and reasonable, has inner wall tube intensity high wear resistance height, and oversheath pipe flexibility is good, and overall physical properties is good, using effect is good, long service life, can effectively reduce advantages such as carrying cost; Its processing method is first and then unique, and the high carbon steel welding procedure is leading domestic, and it is advanced to have started high carbon steel moulding welding, is a kind of compound pumping vehicle arm rack delivery pipe and processing method that has than high innovation character.
Description of drawings
Fig. 1 is the radial cross-section of the compound pumping vehicle arm rack delivery pipe of high-strength, high-anti-friction;
Fig. 2 is the axial sectional view of the compound pumping vehicle arm rack delivery pipe of high-strength, high-anti-friction.
1-inner wall tube, 2-oversheath pipe.
Embodiment
The invention will be further described below by specific embodiment, and following examples are descriptive, is not determinate, can not limit protection scope of the present invention with this.
A kind of compound pumping vehicle arm rack delivery pipe, constituted by inner wall tube and oversheath pipe, described inner wall tube is LZN material high-carbon low-alloy steel high-frequency straight seam welded pipe, and described oversheath pipe is LZW material high-frequency straight seam welded pipe, and inner wall tube is set in the oversheath pipe and is combined as a whole.
A kind of processing method of compound pumping vehicle arm rack delivery pipe steps of the method are:
⑴. produce the oversheath pipe:
Adopting LZW material sheet metal is raw material, makes LZW material high-frequency straight seam welded pipe with high-frequency welding manner;
⑵. produce inner wall tube:
Adopt LZN material high-carbon low-alloy steel, make LZN material high-carbon low-alloy steel high-frequency straight seam welded pipe with high-frequency welding manner;
⑶. the suit of oversheath pipe and inner wall tube:
Inner wall tube is threaded onto oversheath pipe inside;
⑷. the oversheath pipe is combined with the inner wall tube undergauge:
Oversheath pipe after utilizing aligning undergauge device to suit is aligned undergauge, and oversheath pipe and inner wall tube are closely as one;
⑸. heat treatment:
The inner wall tube and the oversheath pipe that are combined as a whole are heat-treated, and the hardness of inner wall tube is not less than HRC60 after treatment.
Producing inner wall tube among the step ⑵ comprises the steps:
1.. raw material is chosen:
The selection carbon content is the inner wall tube raw material at 0.58～0.68% LZN high-carbon low-alloy steel band steel;
2.. moulding is prepared:
To LZN high-carbon low-alloy steel band steel test, slitting, sheared edge reconditioning, the check of band steel, uncoiling, leveling, shearing butt joint;
3.. moulding:
Adopt the forming roll group that the band steel is carried out moulding, make it be shaped to the tubular pipe;
4.. high frequency welding:
Adopt high-frequency welding manner with step 3. in the tubular pipe of moulding be welded into LZN high-carbon low-alloy steel welded tube;
5.. intermediate frequency normalizing heat treatment:
Utilize the linear induction heater that LZN high-carbon low-alloy steel welded tube is carried out intermediate frequency normalizing heat treatment;
6.. air cooling, water-cooled:
LZN high-carbon low-alloy steel welded tube enters in the water-cooled case below the air cooling to 350 ℃ after intermediate frequency normalizing heat treatment, and the body temperature reaches about 70 ℃ after the water-cooled.
7.. sizing, aligning, sawing, tack;
Cooled LZN high-carbon low-alloy steel welded tube is carried out sizing, aligning, sawing and tack successively to be handled
8.. the hydrostatic test:
Utilize hydraulic press that LZN high-carbon low-alloy steel welded tube is carried out pressure test.
LZN high-carbon low-alloy steel raw material has following chemical composition:
| C | Si | Mn | P | S | Cr | Cu | Nb | V | Ti | Ni |
| 0.62 | 0.21 | 1.05 | 0.012 | 0.003 | 0.31 | 0.01 | 0.02 | 0.03 | 0.014 | 0.02 |
Step is 4.. and its processing parameter of high frequency welding is:
High frequency power: 186-234KW;
Frequency: 298-302KHZ;
Welding speed: 21-24m/min;
Heating in medium frequency temperature: 830-880 ℃;
Go out the horizontal dimension behind the squeezing roll: 128.9mm;
Go out the vertical dimension behind the squeezing roll: 129.5mm;
The metallographic test result:
1. before the intermediate frequency process:
Heat affected zone width: 0.84-0.96mm
Fusion zone width: 0.02-0.08mm
Metal streamline angle: 58-70 °;
2. after the intermediate frequency process:
Fusion zone, heat affected zone are organized as evenly tiny ferrite and sorbite.
Working principle of the present invention is:
The compound pumping vehicle arm rack delivery pipe of the present invention, because its inner wall tube is the high-carbon low-alloy steel high-frequency straight seam welded pipe, so wear resistance height, long service life, outer pillar is flexible good High-Strength Low-Alloy structural steel high-frequency straight seam welded pipe, and inner wall tube oversheath duct ligation closes tight no gap, and shock resistance is good, using effect is good, can effectively reduce the conveying cost; The inner wall tube production method of the compound pumping vehicle arm rack delivery pipe of the present invention: i.e. the welding procedure of strict selection, scientific and reasonable adjustment inner wall tube, strict control high frequency welding temperature (namely rationally controlling high frequency input, output power), extruding force and welding speed, can finish moulding and the welding of high carbon steel; Utilize the undergauge combination behind the inner wall tube oversheath pipe box dress, can make it not have the gap in conjunction with densification and form and be one; Adopt special process that the composite pipe that cover installs is heat-treated, can make inner wall tube have high intensity, hardness, hardness is not less than HRC60, thereby produces that inner wall tube is wear-resisting, the compound pumping vehicle arm rack delivery pipe of long service life, the pliable and tough impact resistance of oversheath pipe.
Claims (5)
1. compound pumping vehicle arm rack delivery pipe, it is characterized in that: constituted by inner wall tube and oversheath pipe, described inner wall tube is LZN material high-carbon low-alloy steel high-frequency straight seam welded pipe, and described oversheath pipe is LZW material ERW, and inner wall tube is set in the oversheath pipe and is combined as a whole.
2. the processing method of the described compound pumping vehicle arm rack delivery pipe of claim 1 is characterized in that: steps of the method are:
⑴. produce the oversheath pipe:
Adopting LZW material sheet metal is raw material, makes LZW material ERW with high-frequency welding manner;
⑵. produce inner wall tube:
Adopt LZN material high-carbon low-alloy steel, make LZN material high-carbon low-alloy steel high-frequency straight seam welded pipe with high-frequency welding manner;
⑶. the suit of oversheath pipe and inner wall tube:
Inner wall tube is threaded onto oversheath pipe inside;
⑷. the oversheath pipe is combined with the inner wall tube undergauge:
Oversheath pipe after utilizing aligning undergauge device to suit is aligned undergauge, and oversheath pipe and inner wall tube are closely as one;
⑸. heat treatment:
The inner wall tube and the oversheath pipe that are combined as a whole are heat-treated, and the hardness of inner wall tube is not less than HRC60 after treatment.
3. compound pumping vehicle arm rack delivery pipe processing method according to claim 2 is characterized in that: produce inner wall tube among the described step ⑵ and comprise the steps:
1.. raw material is chosen:
The selection carbon content is the inner wall tube raw material at 0.58～0.68% LZN high-carbon low-alloy steel band steel;
2.. moulding is prepared:
To LZN high-carbon low-alloy steel band steel test, slitting, sheared edge reconditioning, the check of band steel, uncoiling, leveling, shearing butt joint;
3.. moulding:
Adopt the forming roll group that the band steel is carried out moulding, make it be shaped to the tubular pipe;
4.. high frequency welding:
Adopt high-frequency welding manner with step 3. in the tubular pipe of moulding be welded into LZN high-carbon low-alloy steel welded tube;
5.. intermediate frequency normalizing heat treatment:
Utilize the linear induction heater that LZN high-carbon low-alloy steel welded tube is carried out intermediate frequency normalizing heat treatment;
6.. air cooling, water-cooled:
LZN high-carbon low-alloy steel welded tube enters in the water-cooled case below the air cooling to 350 ℃ after intermediate frequency normalizing heat treatment, and the body temperature reaches about 70 ℃ after the water-cooled;
7.. sizing, aligning, sawing, tack;
Cooled LZN high-carbon low-alloy steel welded tube is carried out sizing, aligning, sawing and tack successively to be handled;
8.. the hydrostatic test:
Utilize hydraulic press that LZN high-carbon low-alloy steel welded tube is carried out pressure test.
4. compound pumping vehicle arm rack delivery pipe processing method according to claim 3 is characterized in that:
Described LZN high-carbon low-alloy steel raw material has following chemical composition:
。
5. compound pumping vehicle arm rack delivery pipe processing method according to claim 4, it is characterized in that: described step is 4.. and its processing parameter of high frequency welding is:
High frequency power: 186-234KW, frequency: 298-302KHZ, welding speed: 21-24m/min, heating in medium frequency temperature: 830-880 ℃, go out the horizontal dimension behind the squeezing roll: 128.9mm, go out the vertical dimension behind the squeezing roll: 129.5mm.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013100890672A CN103256433A (en) | 2013-03-20 | 2013-03-20 | Composite pumper cantilever crane conveying pipe and processing technique thereof |
| CN201310571297.2A CN103557375B (en) | 2013-03-20 | 2013-11-13 | Composite pump truck arm frame delivery pipe and processing technology thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013100890672A CN103256433A (en) | 2013-03-20 | 2013-03-20 | Composite pumper cantilever crane conveying pipe and processing technique thereof |
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| CN2013100890672A Pending CN103256433A (en) | 2013-03-20 | 2013-03-20 | Composite pumper cantilever crane conveying pipe and processing technique thereof |
| CN201310571297.2A Active CN103557375B (en) | 2013-03-20 | 2013-11-13 | Composite pump truck arm frame delivery pipe and processing technology thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105750832A (en) * | 2014-12-18 | 2016-07-13 | 中国石油天然气集团公司 | Production method for bimetal composite pipe |
| CN110153725A (en) * | 2018-02-12 | 2019-08-23 | 周朝辉 | A kind of abrasion-proof pipe preparation system based on high-carbon high-chromium steel |
| CN115213306A (en) * | 2022-08-29 | 2022-10-21 | 娄底市鼎成管业有限公司 | Preparation method of wear-resistant alloy pipeline |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105215633B (en) * | 2015-09-19 | 2018-01-16 | 云南昆钢新型复合材料开发有限公司 | A kind of preparation method of wearing composite material carrying roller |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102032397B (en) * | 2010-12-24 | 2012-02-08 | 三一重工股份有限公司 | Concrete delivery tube and preparation method thereof |
| CN102128312A (en) * | 2010-12-31 | 2011-07-20 | 三一重工股份有限公司 | Taper pipe for concrete pumping device and manufacturing method thereof |
| CN202176830U (en) * | 2011-07-15 | 2012-03-28 | 宜昌中南精密钢管有限公司 | Thermometal composite tube |
| CN102506237B (en) * | 2011-11-01 | 2014-07-09 | 三一汽车制造有限公司 | Concrete conveying pipe and manufacturing method thereof |
| CN202432132U (en) * | 2011-12-13 | 2012-09-12 | 常州腾跃不锈钢管有限公司 | Environment-friendly stainless steel tube |
| CN202452011U (en) * | 2012-01-06 | 2012-09-26 | 三一重工股份有限公司 | Straight pipe and concrete conveying device |
| CN203614933U (en) * | 2013-03-20 | 2014-05-28 | 天津市联众钢管有限公司 | Composite pump truck arm frame delivery pipe |
-
2013
- 2013-03-20 CN CN2013100890672A patent/CN103256433A/en active Pending
- 2013-11-13 CN CN201310571297.2A patent/CN103557375B/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105750832A (en) * | 2014-12-18 | 2016-07-13 | 中国石油天然气集团公司 | Production method for bimetal composite pipe |
| CN110153725A (en) * | 2018-02-12 | 2019-08-23 | 周朝辉 | A kind of abrasion-proof pipe preparation system based on high-carbon high-chromium steel |
| CN115213306A (en) * | 2022-08-29 | 2022-10-21 | 娄底市鼎成管业有限公司 | Preparation method of wear-resistant alloy pipeline |
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| CN103557375A (en) | 2014-02-05 |
| CN103557375B (en) | 2017-01-25 |
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Application publication date: 20130821 |