CN101736141A - Process for heat treatment of steel pipe and production equipment thereof - Google Patents
Process for heat treatment of steel pipe and production equipment thereof Download PDFInfo
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- CN101736141A CN101736141A CN200910273424A CN200910273424A CN101736141A CN 101736141 A CN101736141 A CN 101736141A CN 200910273424 A CN200910273424 A CN 200910273424A CN 200910273424 A CN200910273424 A CN 200910273424A CN 101736141 A CN101736141 A CN 101736141A
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Abstract
The invention relates to a process for the heat treatment of a steel pipe and production equipment thereof. The invention solves the problems of low qualified rate of products, unstable temperature control and low integral heating efficiency of a furnace caused by the non-uniform heating of heat treatment products. The production equipment is characterized in that an efficient combustion system, a heat exchange system and a spiral type mechanical transmission system are arranged in a furnace body, and the entire circuit adopts a Siemens PLC S7-300 industrial control system. The invention has the advantages of uniform heating, easy temperature control, superior product quality and the like. The whole furnace is provided with a full automatic feeding and discharging mechanism and adopts a full automatic detection and control system, the labor strength of workers is reduced, the working efficiency is enhanced, the burning qualified rate of the product reaches 99%, and the energy is saved by 38%.
Description
One, technical field
The invention belongs to the metal heat treatmet field, relate in particular to make stable temperature control in the stove, heating and heat treatment efficiency height, process for heat treatment of steel pipe and production unit thereof that being heated evenly property of steel pipe is good.
Two, background technology
In recent years, along with advancing by leaps and bounds of domestic and international industrial equipments technology, be widely used in the welded tube of industrial oil transportation, natural gas transport, city water delivery, coal gas conveying, heat distribution pipe network, pilework building and mechanical component manufacturing and the demand of weldless steel tube and constantly riseing.Factor affecting in the majority such as metallurgical quality, dimensional precision, surface quality and organization mechanics performance the pipe quality quality, although China's tube rolling unit is reached advanced world standards, the dimensional precision of steel pipe can match in excellence or beauty with external import steel pipe, but steel tube surface quality, tissue and mechanical property etc. are still unstable, and causing the unsettled principal element of above-mentioned quality is the thermal treatment process level hysteresis of metallurgical quality and fished pipe.Present Equipment for Heating Processing and technology level differ greatly, the employing that has advanced roller bottom type or stepped start-stop system continuous heat treating furnace, and more still adopting kitchen range formula stove and car-bottom batch-type furnace, and mostly under unprotect atmosphere, heat-treat, therefore cause tube surfaces oxidation and decarbonization and surperficial pitted skin, reduced product surface quality; Simultaneously, owing to the instability of thermal treatment (heating---insulation---cooling), can cause the instability of steel pipe mechanical property.General similar Equipment for Heating Processing also exists body of heater long, the problem that configuration is many, and this has increased cost to enterprise virtually.Problems such as generally speaking, prior art mainly exists heat treated article to be heated and inhomogeneously causes that product percent of pass is low, temperature control is unstable, stove overall thermal efficient is low.
Three, summary of the invention
Purpose of the present invention is exactly in order to address the above problem, for market provides a kind of process for heat treatment of steel pipe and production unit thereof that product is heated evenly, temperature control is easy, stove overall thermal efficient is high that make.
Technical scheme of the present invention is: the process for heat treatment of steel pipe flow process is:
(1) will heat treated steel pipe hanging receiving skid with the crane in the workshop gets the raw materials ready;
(2) charging roller table is sent steel pipe into inlet section;
(3) steel pipe heats by stove by the speed of computer settings;
(4) steel pipe water-cooled discharging, rotation takes place in the walking process forward in discharge end rotating clamp drive this moment steel pipe simultaneously, prevents the steel pipe high temperature deformation.
Thermal treatment temp is 1100 ℃ in the stove, and the cycle is 20min～50min.
Computer adopts triode reason Controlling System, the fieldbus level adopts high speed stable p rofibus fieldbus, procedure level adopts the TCL/IP EPA of 100.10M, main website adopts high-performance S7-300PLC, CPU314-2, Controlling System comprises temperature control, pressure-controlling, burning control and power automatization control.
The spray water of cooling room is not higher than 45 ℃, discharge 30m
3/ h, lift 35m.
The production unit of process for heat treatment of steel pipe is by the solid solution stove, cooling room, feeding unit, composition such as lifting device and drawing mechanism, solid solution furnace main body structure is by steel structure frame, the thermal insulation furnace body that refractory materials is built by laying bricks or stones, be arranged at the roller rod of body of heater inner bottom part, body of heater transmission rig and the firing system formation that is arranged at body of heater, described firing system is by the steam line that is arranged at the body of heater outside, the combustion air pipeline, burner is formed, burner is arranged on the furnace wall, fire end is in body of heater inside, the fuel gas inlet of outer end is connected with steam line by branch gas tube, combustion air enters interchanger, the exhanst gas outlet of interchanger has been installed the automatic smoke exhausting chimney, the end end to end of solid solution stove is equipped with fire door, and described fire door is provided with " U " socket that steel pipe passes; The stove tail end is provided with cooling room, and described cooling room is made of steel structure frame, roller rod, water tank, and water tank links to each other with inlet tube and outlet tube, and nozzle is two-layer many rows, is installed on the water inlet pipe; Exit end at cooling room is provided with spiral drawing mechanism, described spiral drawing mechanism is to be made of with the rotating clamp that is arranged on the walking dolly circular arc hoisting appliance before and after being arranged at body of heater, described circular arc hoisting appliance is by lifting support, the circular arc carriage is formed with Roll that is installed on intrados and hydro-cylinder, described rotating clamp comprises rotation and lifting platform and gripping unit two portions, gripping unit be by be installed on the walking dolly frame roof crossbeam by screw mandrel, bearing support, motor, compressing steamboat forms, the rotation and lifting platform is by arc stent, guide deflection sheave and be placed in the uniform gear of arc stent intrados and the roller of band gear constitutes, its driving toothed gear links to each other with motor, rotation and lifting platform bottom is fixed on the base plate of walking dolly, the base plate both sides are provided with wheel and install in orbit, are driven by movable motor.
The invention will be further described below in conjunction with accompanying drawing.
Four, description of drawings
Fig. 1 is the utility model one-piece construction front view;
Fig. 2 is the utility model walking dolly and rotating clamp structural representation;
Fig. 3 is the utility model circular arc hoisting appliance structural representation;
Fig. 4 is the utility model cooling room structural representation.
Among the figure: 1 is magnetic valve, and 2 is burner, and 3 is butterfly valve, and 4 is ball valve, 5 is the nozzle water inlet pipe, and 6 is the top water tank, and 7 is interchanger, and 8 is lifting support, 9 is Roll, and 10 is hold-down gear, and 11 is arc stent, and 12 is radiator drain, 13 is the Sweet natural gas arm, and 14 is combustion-supporting airduct, and 15 is the Sweet natural gas house steward, and 16 is the roller rod, 17 is roller rod bearing support, and 18 are the charging stand, and 19 is walking dolly, and 20 is the circular arc carriage, 21 are following steelframe, and 22 is wheel, and 23 is track, 24 is motor, and 25 is motor, and 26 is the circular arc hoisting appliance, 27 is support lifting guide deflection sheave, and 28 is gear, and 29 is roller, 30 is hydro-cylinder, and 31 is nozzle, and 32 is the side wall water tank, 33 is the arc stent guide deflection sheave, and 34 is screw mandrel, and 35 is bearing support, 36 is belt pulley, and 37 is motor, and 38 for compressing steamboat, 39 is lifting table, and 40 is crossbeam, and 41 is the charge for remittance cover.
Five, embodiment
Being that the enterprise that the metal body of φ 457mm-φ 1200mm is heat-treated is an example to caliber, at first build one 4.2 meters the continuous pusher steel pipe heat treatment furnace equipment of rotation, this Equipment for Heating Processing comprises one 2.5 meters solid solution stove and 1.7 meters cooling room and charging/discharging device.The body of heater that the body of heater integral body of solid solution stove is built by laying bricks or stones by steel structure frame, refractory materials, firing system etc. constitute.Firing system mainly is made of four burners, piping system and heat exchanger apparatus.Respectively there are 2 burners 2 on the both sides of furnace length direction, per two burners 2 are divided into one group, burner 2 is arranged on the furnace wall, fire end is in body of heater inside, the fuel gas inlet of outer end is connected with Sweet natural gas house steward 15 by Sweet natural gas arm 13, and the exhanst gas outlet of interchanger 7 has been installed the automatic smoke exhausting chimney.At solid smelting furnace two ends fire door is set, prevents that flue gas is excessive in a large number, thus energy efficient, fire door can be provided with fiber under the fire door with manually opened, guarantees that each batch pipe material just enters thermal treatment in the stove, when pipe material size variation is big, guarantee that by manually using fire door instead the pipe material passes through.Described charging fire door adopts the heat resisting iron door, can be at the stove side by the fire door of operation control manually height, and opposite side is provided with balance weight iron, makes the fire door operation light.Solid solution stove back connects 1.7 meters long cooling rooms, indoorly is provided with two-layer many row's nozzles 31, and both sides and top are respectively equipped with side wall water tank 32 and top water tank 6, and recirculated water is arranged in the water tank.The front end of body of heater is provided with 8.9 meters long charging stand 18, the roller rod 16 of tape spool bearing 17 is installed on the stand, distance between the roller rod 16 is 700mm, roller rod one end is equipped with sprocket wheel, chain and sprocket wheel assembling, driven by driving motor, variable frequency adjustment is as Power Drive Unit, bearing support 17 is the double-row self-aligning roller bearing, model is LH-22212B, and roller rod 16 is φ 180 * 8mmA3 steel rider, and bearing support 17 leaves oil-way, by the artificial lubricating grease that regularly adds, chain is by the artificial 20# oil lubricating of regularly annotating, and the pipe material is deposited on the roller rod, is rotated to manage by roller rod 16 and expects to be transported in the stove.The roller rod transporting mechanism that is arranged at body of heater and cooling room is by the chain gear of adopting variable-frequence governor control, be the systemic circulation mode, mainly comprise: driving motor, chain, sprocket wheel, roller rod etc., drive by a driving motor, the driving limit is a tension side, driving motor is the buncher of 1 7.5KW, adopt variable frequency adjustment, roller rod bearing support is a cast-iron chock, and the tension side bearing is a high-temperature bearing, and the roller rod is φ 180 * 24 centrifugally cast roll rods, material is ZG40Cr25Ni20Si2, bearing support leaves oil-way, artificial grease up regularly, the artificial filling regularly of chain 20# oil lubricating.Because necessary continuous operation when producing, the transmission mechanism of furnace roller requires that reliable standby power supply is arranged for this reason, so that furnace roller at high temperature must not stall.Drawing mechanism is to be made of with the rotating clamp that is arranged on the walking dolly 19 circular arc hoisting appliance 26 before and after being arranged at body of heater, circular arc hoisting appliance 26 is made up of lifting support 8, circular arc carriage 20 and the Roll 9 and the hydro-cylinder 30 that are installed on intrados, and rotating clamp comprises the rotation and lifting platform 39 and the gripping unit 10 of bottom.Described gripping unit is by being installed in screw mandrel 34, bearing support 35, motor 37 on the walking dolly frame roof crossbeam 40, compressing steamboat 38 and form, rotation and lifting platform 39 is by arc stent 11, guide deflection sheave 33 and is placed in the uniform gear 28 of arc stent 11 intrados and is with the roller 29 of gear to constitute, its driving toothed gear links to each other with motor 45, arc stent 11 bottoms are fixed on the base plate of walking dolly 19, the base plate both sides are provided with wheel and install in orbit, drive by movable motor 44, adopt the rack-and-pinion transmission on one side, Yi Bian adopt common steamboat transmission.A track is equipped with tooth bar, and a track is equipped with the square steel track.Whole piece Equipment for Heating Processing device instrument temperature controlling system, blower fan control system, hydraulic control system, temperature display system, Machinery Control System, security alerting system and computer control system.Implement when of the present invention, at first make hydro-cylinder 30 declines in the lifting support 8 that is arranged at the body of heater feed end make circular arc carriage 20 be lower than roller rod 16 upper level, again steel pipe to be heated is positioned on the roller rod 16 of charging stand 18, open the charging motor, sprocket wheel by the chain gear end rotates the roller rod, steel pipe placed thereon is advanced in the solid solution body of heater, stretch out cooling room until steel tube end part, arrive between rotation and lifting platform 39 and the gripping unit 10, open hydro-cylinder 30 then and make its rising, circular arc carriage 20 rises steel pipe is held up to the appropriate location, connect the motor power on the walking dolly, make rotation and lifting platform 39 rise to the steel pipe bottom, with gripping unit 10 steel pipe is clamped again.After performing above-mentioned preparation work, the automatic push button that starts a whole set of solid solution stove is heat-treated steel pipe, and the burner in the solid solution stove is straight fiery energy-saving type hot air Sweet natural gas burner, and quantity is 8, and power is 120KW, is interspersed up and down.Blower fan is a variable frequency control, and quantity is 2, and one opens one is equipped with, and model is 9-264.5A, and power is 7.5KW, and air quantity is 3130-3685m
3/ h, blast are 47767-4910Pa, and motor is 7.5KWx3P, 380v, 50Hz.Improve most the safety anti-explosive measure below having adopted in the design of stove gas pipeline system at the bottom of the roller: (1) every burner is flame-out reports to the police and the preceding electric gas valve of automatic quick acting switching-off burner, after the automatic again igniting, carries out the purging in 3 seconds; (2) Sweet natural gas under-voltage (≤2Kpa), fan trouble or under-voltage (≤2.5Kpa), pressurized air is under-voltage (≤system alarm 0.2Mpa) time, delay time after 6 seconds, fault is not eliminated yet, then automatic each burner controller power supply of quick acting switching-off (thereby cutting off the Sweet natural gas magnetic valve automatically), simultaneously automatic quick acting switching-off house steward safety cut-off valve is called o-volt protection traditionally; When (3) having a power failure suddenly, cut off the preceding electric gas valve of burner automatically, behind the incoming call, behind manual activation house steward safety cut-off valve, enter normal purging ignition procedure; Safety cut-off valve adopts German Huo Kede Electromgnetic seat trip valve, and manner of execution is the slow open form of quick closing valve (≤0.8 second), is called loss protecting on this motor habit; (4) all be provided with the high-end system that gives out of gas on all stokehold gas pipelines ends and the house steward, must take to diffuse separately; During blow-on first or long-time blowing out again during blow-on, must purge, the air in the pipeline be put only, in order to avoid generation detonation or blast when igniting to blast main and stove; (5) all stokehold air main ends all are provided with protecting cover rupture disk, in case Sweet natural gas reveals because of valve or other reasons infiltrates airline, produce gas explosion, puncture the rupture disk pressure release, avoid causing the person or equipment injury security incident.Dispose manual ball valve trip valve (2 road), Italian madas inlet natural gas strainer, the uncommon extreme pressure transmitter of the U.S., Italian madas self-forced type relief valve, Italian madas import Electromgnetic seat trip valve, intelligent turbo flow meter on the Sweet natural gas intake header respectively, diffuse pipeline etc. safely, bore is DN65; After automatic Regulation, natural gas line pressure is from first road manual ball valve trip valve≤40Kpa voltage stabilizing of reducing pressure automatically, and is constant in 3Kpa～5Kpa, because the relief valve flow of being joined is bigger, in the frequent regulate process of stove flame, pressure surge is minimum, guarantees the temperature control process stabilization; The range of intelligence turbo flow meter is set at 15～200Nm
3/ h is to guarantee the accurate and accurate of gas metering.Be provided with the combustion gas main line before every cover burner, all be provided with automatic Sweet natural gas cutting-off valve of Italian import and hand off valve on the pipeline.The automatic control of whole processes such as every cover burner can be realized lighting a fire, flame-out warning.Temperature is controlled at 1100 ℃ in the stove, in order to reach accurate and reliable control, full stove burner divides 2 groups of temperature-controlled areas, top and the bottom burner each minute 1 district, per 3 brunched burner nozzles one district, two performer are controlled every group of combustion air flow and every group of gas discharge, respectively organize the flow of air quantity and Sweet natural gas during by temperature current signal feedback controlled temperature, realize flow proportional burning control, both reached accuracy control over temperature, reach energy-conservation effect again, all the other temperature are only done to show and are used.The burner blower Frequency Converter Control is controlled and stable combustion air main pipe pressure by PLC automatically with transmitter, guarantees combustion stablized needs.This moment, steel pipe after heat treatment was set at rotation on the walking dolly 19 when clamping drawing mechanism and outwards pull out, swivel arrangement makes gear 28 rotate under the transmission of motor 25, driving roller 29 rotates, thereby self was also rotating when steel pipe was gone ahead, and reached the purpose of spiral discharging.Heated steel pipe is sent 45 ℃ of water into spray header by spray pump after the solid solution stove comes out to enter cooling room, according to the required process for cooling of pipe material, spray up and down.Cooling room is made with the heat-resistance stainless steel material, guarantees not yieldingly, and cooling room is provided with cover, the water recycle and reuse when the bottom cover is provided with catchment tray and will cools off, and the entry design water curtain prevents that water coolant from spraying in the stove, destroys refractory materials.2 of spray pumps (1 opens 1 is equipped with), 45 ℃ of discharge 30m
3/ h, lift 35m.Steel pipe through being cooled after the heat treated is towed to discharge pedestal by walking dolly, by the direct labor warehouse is deposited in its taking-up.Because this continuous feeding and discharging device is heated evenly steel pipe heat treatment process in stove, easy, the stove overall thermal efficient height of temperature control, stable mechanical property, good quality of product.
The present invention is in order to guarantee that the circuit control system that the steel pipe thermal treatment quality adopts is a Siemens PLC C S7-300 industrial control system.This system is a typical computer triode reason Controlling System (open Controlling System), the fieldbus level adopts high speed stable p rofibus fieldbus, open standard, be easy to expansion, procedure level adopts the TCL/IP EPA of 100.10M, can abovely hang many active stations (OS), and can make things convenient for network interworking with the higher level, the native system main website adopts high-performance S7-300PLC, CPU314-2, and Controlling System comprises temperature control, pressure-controlling, burning control and power automatization control etc.The user can operate control and monitoring to process simulation amounts such as furnace temperature, flow, pressure atmosphere detection and frequency transformers by upper main frame.By the DI/DO module interlocked control is carried out in the operation of equipment such as blower fan, driving motor, by-pass valve control, pressure switch and warning howler.AI/AO module by intelligence is to parameter acquisition and controls such as temperature, pressure, flow, valve position.AI/AO all is equipped with the isolation input/output module, S7-300 computer PLC Controlling System has the characteristics of compact construction, modularization, intellectuality, distributed I/O (I/O) system, can expand arbitrarily with fieldbus, can control by multiple devices, configuration and control software are carried out endless expansion, the slave station operating device can be placed on the scene, by network each dot data is entered computer controlling center.Data gathering, process control, test and measurement, the security of this system in metallurgical furnace industry automatization control application, be easy to safeguard etc. that the aspect provides flexible, general and economic solution.Requirement according to product processes, in order to guarantee the work steady in a long-term of Controlling System energy, has higher control accuracy, better security and maintainability, make following system configuration: industrial control host is selected the ICP-3785 of Taiwan Weida industrial computer system for use, and as upper main control system, PLC selects the S7-300 of Siemens series controller for use, ET200 type DI/DO isolation module and AI/AO isolation module with complete series, all products all pass through CE, UL, the authentication of CSA safety.System software comprises the upper monitoring management software packages, the next empty packet software package.The major function of upper monitoring management software packages: temperature and flow curve are set, curve motion red-tape operati (curve download, the operation of automation curve group), production data recording (alarm logging, temperature/pressure/flow/reference records such as valve position, each point curve record), the real-time demonstration and the control of all devices, parameter, curve.The controlled variable of following level controlling system is set, automatic/hand operation control.The major function of the next control software bag: the collection of simulating signals such as temperature/pressure/flow, PID output be control and manually control, the Communication Control of AI/AO module and operation monitoring automatically.Can connect by Ethernet and carry out net connection, carry out many computer-controlled operations of different location, but have operating right.Industrial computer configuration 3.0GCPU, 1G internal memory, 120G hard disk, 17 " indicating meter, be furnished with the EPSONPhotoEX3A3 printer.
Claims (5)
1. process for heat treatment of steel pipe, its technical process is:
(1) will heat treated steel pipe hanging receiving skid with the crane in the workshop gets the raw materials ready;
(2) charging roller table is sent steel pipe into inlet section;
(3) steel pipe heats by stove by the speed of computer settings;
(4) steel pipe water-cooled discharging, rotation takes place in the walking process forward in discharge end rotating clamp drive this moment steel pipe simultaneously, prevents the steel pipe high temperature deformation.
2. steel pipe treatment production technology according to claim 1 is characterized in that: thermal treatment temp is 1100 ℃ in the stove, and the cycle is 20min～50min.
3. steel pipe treatment production technology according to claim 1, it is characterized in that: computer adopts triode reason Controlling System, the fieldbus level adopts high speed stable p rofibus fieldbus, procedure level adopts the TCL/IP EPA of 100.10M, main website adopts high-performance S7-300PLC, CPU314-2, Controlling System comprises temperature control, pressure-controlling, burning control and power automatization control.
4. steel pipe treatment production technology according to claim 1 is characterized in that: the spray water of cooling room is not higher than 45 ℃, discharge 30m
3/ h, lift 35m.
5. the production unit of a process for heat treatment of steel pipe, it comprises the solid solution stove, cooling room, feeding unit, lifting device and drawing mechanism, it is characterized in that: solid solution furnace main body structure is by steel structure frame, the thermal insulation furnace body that refractory materials is built by laying bricks or stones, be arranged at the roller rod of body of heater inner bottom part, body of heater transmission rig and the firing system formation that is arranged at body of heater, described firing system is by the steam line that is arranged at the body of heater outside, the combustion air pipeline, burner is formed, burner is arranged on the furnace wall, fire end is in body of heater inside, the fuel gas inlet of outer end is connected with steam line by the combustion gas arm, combustion air enters interchanger, the exhanst gas outlet of interchanger has been installed the automatic smoke exhausting chimney, the end end to end of solid solution stove is equipped with fire door, and described fire door is provided with " U " socket that steel pipe passes; The stove tail end is provided with cooling room, and described cooling room is made of steel structure frame, roller rod, water tank, and water tank links to each other with inlet tube and outlet tube, and nozzle is two-layer many rows, is installed on the water inlet pipe; Exit end at cooling room is provided with spiral drawing mechanism, described spiral drawing mechanism is to be made of the rotating clamp that is arranged at body of heater front and back circular arc hoisting appliance (26) and be arranged on the walking dolly (19), described circular arc hoisting appliance (26) is by lifting support (8), circular arc carriage (20) and be installed on the Roll (9) of intrados and hydro-cylinder (30) is formed, described rotating clamp comprises rotation and lifting platform (39) and gripping unit (10) two portions, gripping unit be by be installed on the walking dolly frame roof crossbeam (40) by screw mandrel (34), bearing support (35), motor (37), compressing steamboat (38) forms, rotation and lifting platform (39) is by arc stent (11), guide deflection sheave (33) and be placed in the uniform gear (28) of arc stent (11) intrados and the roller (29) of band gear constitutes, its driving toothed gear links to each other with motor (25), rotation and lifting platform (39) bottom is fixed on the base plate of walking dolly (19), the base plate both sides are provided with wheel (22) and are installed on the track (23), are driven by movable motor (24).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102734244A CN101736141B (en) | 2009-12-25 | 2009-12-25 | Production equipment of process for heat treatment of steel pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102734244A CN101736141B (en) | 2009-12-25 | 2009-12-25 | Production equipment of process for heat treatment of steel pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101736141A true CN101736141A (en) | 2010-06-16 |
| CN101736141B CN101736141B (en) | 2011-08-17 |
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ID=42460171
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009102734244A Expired - Fee Related CN101736141B (en) | 2009-12-25 | 2009-12-25 | Production equipment of process for heat treatment of steel pipe |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102514774A (en) * | 2011-12-14 | 2012-06-27 | 芜湖精塑实业有限公司 | Device for treating thermal insulation strips before packaging |
| CN103213156A (en) * | 2013-04-02 | 2013-07-24 | 金红叶纸业集团有限公司 | Automatic pipe cutting device |
| CN105695715A (en) * | 2016-03-30 | 2016-06-22 | 江苏界达特异新材料股份有限公司 | Large-aperture thin-wall pipe heat treatment anti-deformation device and technology thereof |
| CN112626334A (en) * | 2020-12-16 | 2021-04-09 | 无锡腾跃特种钢管有限公司 | Heat treatment process capable of automatically controlling temperature |
-
2009
- 2009-12-25 CN CN2009102734244A patent/CN101736141B/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102514774A (en) * | 2011-12-14 | 2012-06-27 | 芜湖精塑实业有限公司 | Device for treating thermal insulation strips before packaging |
| CN103213156A (en) * | 2013-04-02 | 2013-07-24 | 金红叶纸业集团有限公司 | Automatic pipe cutting device |
| CN105695715A (en) * | 2016-03-30 | 2016-06-22 | 江苏界达特异新材料股份有限公司 | Large-aperture thin-wall pipe heat treatment anti-deformation device and technology thereof |
| CN105695715B (en) * | 2016-03-30 | 2017-08-11 | 江苏界达特异新材料股份有限公司 | The heat treatment deformation device and its process of large-diameter and thin-wall pipe |
| CN112626334A (en) * | 2020-12-16 | 2021-04-09 | 无锡腾跃特种钢管有限公司 | Heat treatment process capable of automatically controlling temperature |
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| Publication number | Publication date |
|---|---|
| CN101736141B (en) | 2011-08-17 |
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Application publication date: 20100616 Assignee: Huanggang Zhongzhou anda Thermal Engineering Equipment Co., Ltd. Assignor: Huanggang Hua kiln Zhongzhou kiln Co., Ltd. Contract record no.: 2013420000049 Denomination of invention: Production equipment of process for heat treatment of steel pipe Granted publication date: 20110817 License type: Exclusive License Record date: 20130523 |
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Assignee: Huanggang Zhongzhou anda Thermal Engineering Equipment Co., Ltd. Assignor: Huanggang Hua kiln Zhongzhou kiln Co., Ltd. Contract record no.: 2013420000049 Date of cancellation: 20130823 |
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| LICC | Enforcement, change and cancellation of record of contracts on the licence for exploitation of a patent or utility model | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110817 Termination date: 20131225 |