CN203360495U - Quenching equipment for hardening inner wall of bent steel pipe - Google Patents
Quenching equipment for hardening inner wall of bent steel pipe Download PDFInfo
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- CN203360495U CN203360495U CN2013203581290U CN201320358129U CN203360495U CN 203360495 U CN203360495 U CN 203360495U CN 2013203581290 U CN2013203581290 U CN 2013203581290U CN 201320358129 U CN201320358129 U CN 201320358129U CN 203360495 U CN203360495 U CN 203360495U
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- 238000010791 quenching Methods 0.000 title claims abstract description 146
- 230000000171 quenching effect Effects 0.000 title claims abstract description 136
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 89
- 239000010959 steel Substances 0.000 title claims abstract description 89
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 134
- 229910052802 copper Inorganic materials 0.000 claims abstract description 74
- 239000010949 copper Substances 0.000 claims abstract description 74
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 71
- 230000006698 induction Effects 0.000 claims abstract description 45
- 239000000498 cooling water Substances 0.000 claims abstract description 24
- 238000001816 cooling Methods 0.000 claims description 32
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- 238000004519 manufacturing process Methods 0.000 claims description 3
- 238000004062 sedimentation Methods 0.000 claims 4
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- 238000006243 chemical reaction Methods 0.000 claims 2
- 238000000746 purification Methods 0.000 claims 2
- 239000000110 cooling liquid Substances 0.000 claims 1
- 239000013013 elastic material Substances 0.000 claims 1
- 238000002347 injection Methods 0.000 claims 1
- 239000007924 injection Substances 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 9
- 239000002826 coolant Substances 0.000 description 53
- 230000001939 inductive effect Effects 0.000 description 30
- 208000034189 Sclerosis Diseases 0.000 description 8
- 230000001276 controlling effect Effects 0.000 description 6
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- 238000001764 infiltration Methods 0.000 description 2
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- 238000001556 precipitation Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 229910000976 Electrical steel Inorganic materials 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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Abstract
本实用新型涉及一种弯钢管内壁硬化淬火设备，冷却水双层铜杆端部设有感应头，另一端与中高频感应淬火变压器连接，冷却水双层铜杆通过设在淬火车基础的气动支架支撑，所述的淬火车基础上设有淬火车轨道；淬火车、淬火车轨道、冷却水双层铜杆均为弧度与弯钢管相同的弧形结构；淬火方法：将管径为DN100-DN600的钢管吊装在淬火车辊子中间，通过调整气缸支架位置使感应头与钢管中心同心；通过淬火车移动使感应头到达钢管内端部，感应头给钢管内壁加热，淬火车反向移动，感应头喷水进行淬火。实现了中、大管径钢管的内壁淬火，并保证内壁淬火后淬硬层厚度均匀、硬度均匀、金相组织细密一致。
The utility model relates to a hardening and quenching equipment for the inner wall of a bent steel pipe. An induction head is provided at the end of a double-layer copper rod for cooling water, and the other end is connected with a medium-high frequency induction quenching transformer. The double-layer copper rod for cooling water passes through the pneumatic Supported by a bracket, the quenching car is provided with a quenching car track on the basis of the quenching car; the quenching car, the quenching car track, and the double-layer copper rod for cooling water are all arc-shaped structures with the same radian as the bent steel pipe; quenching method: the pipe diameter is DN100- The DN600 steel pipe is hoisted between the rollers of the quenching car, and the induction head is concentric with the center of the steel pipe by adjusting the position of the cylinder bracket; the induction head reaches the inner end of the steel pipe through the movement of the quenching car, and the induction head heats the inner wall of the steel pipe, and the quenching car moves in reverse, and the induction head Head sprayed with water for quenching. Realize the inner wall quenching of medium and large diameter steel pipes, and ensure uniform thickness, uniform hardness, and fine and consistent metallographic structure of the hardened layer after quenching on the inner wall.
Description
Technical field
The utility model relates to a kind of curved steel pipe inner wall sclerosis quenching apparatus.
Background technology
Fast development along with China's economy, mine, electric power, abrasion-proof pipe 300 myriametres that the industry such as cement, mechanical engineering consumes/more than year, at present, abrasion-proof pipe commonly used has earthenware duct, Double-metal pipe etc., the liner of earthenware duct easily comes off with the outer layer pipe combination, also easily come off when welding, cut very bad control, the weight of Double-metal pipe is large, hardness is low, shock resistance is poor, work-ing life is very short, cost performance is low.This just needs a kind of steel pipe of inwall sclerosis, outer wall can firmly weld, the inwall sclerosis of steel pipe is in order to improve steel pipe inner wall hardness, the metallographic structure of refinement inwall, reach anti abrasive purpose, the mechanical property that simultaneously guarantees outer wall of steel pipe identical with mother metal (being that outer wall of steel pipe does not quench), reach the wear resistance that both guarantees inwall, guarantee again the mechanical property of whole steel pipe.At present, the domestic device category that steel pipe inner wall is quenched is a lot, but is all for pipe with small pipe diameter steel pipe (general caliber is less than DN150mm).Due to the restriction of device structure, induction system, aborning, can not well guarantee during Large Diameter Pipeline steel pipe (general caliber be less than DN600mm) quench-hardened case thickness evenly, hardness evenly, cause the fine and closely woven not consistent specification of quality that waits of metallographic structure.At turning, curved steel pipe need be installed, the quenching of need to hardening equally of this steel pipe inner wall, this just needs inwall sclerosis quenching apparatus of a kind of curved steel pipe special use.
Summary of the invention
For overcoming the deficiencies in the prior art, the purpose of this utility model is to provide a kind of curved steel pipe inner wall sclerosis quenching apparatus, in can realizing, the inwall of Large Diameter Pipeline steel pipe quenches, and guarantee inwall quench after the fine and closely woven specification of quality such as consistent of even, the metallographic structure of quench-hardened case even thickness, hardness.
For achieving the above object, the utility model is achieved through the following technical solutions:
A kind of curved steel pipe inner wall sclerosis quenching apparatus, comprise inductive head, the double-deck copper bar of water coolant, quenching car, quenching car basis, Controlling System, water circulation system, medium-high frequency induction quenching power supply, medium-high frequency induction quenching transformer, the double-deck copper bar of water coolant is arcuate structure, and radian is identical with curved steel pipe; The double-deck copper boom end of water coolant is provided with inductive head, the other end is connected with medium-high frequency induction quenching transformer, the double-deck copper bar of water coolant is by being located at the pneumatic support fixed support on quenching car basis, and the double-deck copper bar of described water coolant outer wall is provided with dismountable Universal caster supporter; Described quenching car is fixed with the quenching car track on basis, and the quenching car track radian of arc is identical with curved steel pipe radian, and described quenching car is arcuate structure, and radian is identical with curved steel pipe radian; Medium-high frequency induction quenching power supply and medium-high frequency induction quenching transformer are the quenching apparatus power supply, and Controlling System is controlled the quenching apparatus operation; Quenching apparatus required water coolant by water circulation system, provided.
Described Universal caster supporter, comprise bracing frame, Universal caster, bracing frame is composed of a fixed connection by fastening piece by two semicircle ring structure, the double-deck copper bar of bracing frame internal diameter and water coolant external diameter is complementary, the central angle places such as bracing frame outer radial are provided with three or three above Universal casters, and the butting section of Universal caster is made by resilient material.
Described quenching car track becomes 4～6 ° of inclination angles with horizontal plane, the close medium-high frequency induction quenching transformer terminal of quenching car track is higher than the other end; Described quenching car rail end is fixed with limit switch.
Described quenching car comprises variable-frequency motor, speed reduction unit, sprocket wheel, carriage, base, base is provided with the carriage of lifting curved steel pipe, and carriage is along curved steel pipe setting, and the carriage height raises successively, carriage near medium-high frequency induction quenching transformer terminal is the highest, is conducive to the outflow of water; The output shaft of variable-frequency motor is connected with speed reduction unit, and sprocket wheel is arranged on speed reduction unit, and sprocket wheel is connected with the quenching wheel by chain.
The double-deck copper bar of described water coolant is made by electro-conductive material, for the logical water coolant of inductive head energising, comprise core bar, loop bar, intermediate bars, copper connector one, copper connector two, the double-deck copper bar of water coolant coaxially is provided with loop bar from outside to inside successively, intermediate bars, core bar, be provided with insulation layer between intermediate bars and core bar, core bar is connected with inductive head by copper connector one with loop bar one end, core bar is connected with water circulation system by copper connector two with the loop bar the other end, loop bar one end is provided with the water inlet pipe one be connected with water circulation system, the other end is provided with the rising pipe one be connected with inductive head, core bar one end is provided with the water inlet pipe two be connected with water circulation system, the other end is provided with the rising pipe two be connected with inductive head.
Described inductive head comprises circular framework, magnetizer, copper connector three, magnetizer is fixedly connected on circular framework, the water service pipe be fixed on circular framework communicates with the cavity in circular framework, circular framework is provided with jet hole, the jet hole hole wall becomes 42～47 ° with curved steel pipe tube wall, and copper connector three is fixedly connected with circular framework.
Described water circulation system comprises water purifying tank, back pool, cooling tower, buffer tank, settling tank, water purifying tank is connected with buffer tank, buffer tank is connected with the water inlet pipe one, two of the double-deck copper bar of water coolant, settling tank is connected with back pool, back pool is connected with cooling tower, connecting pipeline is provided with check valve, and it is cursory in described settling tank, to be provided with, and in described back pool and settling tank, is provided with submersible pump; Water coolant flows into buffer tank by water purifying tank, and buffer tank is that the double-deck copper bar of water coolant supplies water, and the water after quenching enters settling tank by pipeline, and the water after precipitation enters back pool through submersible pump, through infiltration, enters water purifying tank, complete one cooling water circulation.
Described cooling tower comprises cooling tower one, cooling tower two, and cooling tower one is connected with medium-high frequency induction quenching transformer, is the anti-cold liquid cooling of transformer, and the water coolant after using is back to cooling tower one; Cooling tower two is the cooling of casting furnace electrical system.
Compared with prior art, the beneficial effects of the utility model are:
In having realized, the inwall of the curved steel pipe of Large Diameter Pipeline (DN100-DN600) quenches, and guarantee inwall quench after the quench-hardened case even thickness, hardness is even, metallographic structure is fine and closely woven consistent.The double-deck copper bar of water coolant, quenching car, quenching car track are all identical with curved steel pipe radian, make inductive head in the course of the work all the time on curved steel pipe central shaft, have guaranteed uniform quenching; The Universal caster supporter arranged on the double-deck copper bar of water coolant can be adjusted curved steel pipe automatically, makes the double-deck copper bar of curved steel pipe and water coolant coaxial, can be applied to carry containing the more fluid of sandstone, and ore etc., than common curved steel pipe long service life.
The accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Fig. 2 is the quenching car structural representation.
Fig. 3 is the double-deck copper bar of water coolant structural representation.
Fig. 4 is the water circulation system structure iron.
Fig. 5 is Universal caster supporting body structure schematic diagram.
Fig. 6 is the sectional view along the B-B line of Fig. 5.
Fig. 7 is the inductive head structural representation.
Fig. 8 is the inductive head stereographic map.
In figure: the 1-inductive head, , the double-deck copper bar of 2-cooling water, , the 3-quenching car, , 4-quenching car basis, , 5-medium-high frequency impewdance matching power supply, , 6-medium-high frequency impewdance matching transformer, , the pneumatic support of 7-, , 8-quenching car track, , 9-Universal caster supporter, , the 10-Universal caster, the 11-carriage, the 12-variable-frequency motor, , the 13-base, , the 14-core bar, , the 15-loop bar, , 16-quenching wheel, , the curved steel pipe of 17-, , the 18-water circulation system, , the 19-intermediate bar, , the 20-insulating barrier, , 21-copper connector one, , 22-copper connector two, , 23-water inlet pipe one, , 24-water inlet pipe two, , 25-outlet pipe one, , 26-outlet pipe two, , the 27-bracing frame, , the 28-elastomeric material, , the 29-circular framework, , the 30-silicon steel sheet, , 31-copper connector three, , the 32-water service pipe, , the 33-spray-hole, , the 34-decelerator, , the 36-sprocket wheel, , the 37-chain.
Embodiment
Below in conjunction with Figure of description, the utility model is described in detail, but should be noted that enforcement of the present utility model is not limited to following embodiment.
See Fig. 1-Figure 10, a kind of curved steel pipe inner wall sclerosis quenching apparatus, comprise inductive head 1, the double-deck copper bar 2 of water coolant, quenching car 3, quenching car basis 4, Controlling System, water circulation system 18, medium-high frequency induction quenching power supply 5, medium-high frequency induction quenching transformer 6, the double-deck copper bar 2 of water coolant is arcuate structure, and radian is identical with curved steel pipe 17; The double-deck copper bar of water coolant 2 ends are provided with inductive head 1, the other end is connected with medium-high frequency induction quenching transformer 6, the double-deck copper bar 2 of water coolant is by being located at pneumatic support 7 fixed supports on quenching car basis 4, and the double-deck copper bar of described water coolant 2 outer walls are provided with dismountable Universal caster supporter 9; Be fixed with quenching car track 8 on described quenching car basis 4, quenching car track 8 radians of arc are identical with curved steel pipe 17 radians, on described quenching car 3, are fixed with speed change mechanism, and described quenching car 3 is arcuate structure, and radian is identical with curved steel pipe 17 radians; Medium-high frequency induction quenching power supply 5 and medium-high frequency induction quenching transformer 6 are controlled the quenching apparatus operation for quenching apparatus power supply, Controlling System; Quenching apparatus required water coolant by water circulation system 18, provided.
Described Universal caster supporter 9, comprise bracing frame 27, Universal caster 10, bracing frame 27 is composed of a fixed connection by fastening piece by two semicircle ring structure, the double-deck copper bar of bracing frame 27 internal diameters and water coolant 2 external diameters are complementary, the central angle places such as bracing frame 27 outer radial are provided with three or three above Universal casters 10, and the butting section of Universal caster 10 is made by resilient material 28.
Described quenching car track 8 ends are provided with limit switch, and quenching car track 8 becomes 4～6 ° of inclination angles with horizontal plane, and close medium-high frequency induction quenching transformer 6 ends of quenching car track 8 are higher than the other end.
Described quenching car comprises variable-frequency motor 12, speed reduction unit 34, sprocket wheel 36, carriage 11, base 13, base 13 is provided with the carriage 11 of lifting curved steel pipe 17, carriage 11 arranges along curved steel pipe 17, carriage 11 raises highly successively, carriage 11 near medium-high frequency induction quenching transformer 6 ends is the highest, is conducive to the outflow of water; The output shaft of variable-frequency motor 12 is connected with speed reduction unit 34, and sprocket wheel 36 is arranged on speed reduction unit 34, and sprocket wheel 36 is connected with quenching wheel 16 by chain 37.
The double-deck copper bar 2 of described water coolant is made by electro-conductive material, for the logical water coolant of inductive head 1 energising, comprise core bar 14, loop bar 15, intermediate bars 19, copper connector 1, copper connector 2 22, the double-deck copper bar 2 of water coolant coaxially is provided with loop bar 15 from outside to inside successively, intermediate bars 19, core bar 14, be provided with insulation layer 20 between intermediate bars 19 and core bar 14, core bar 14 is connected with inductive head 1 by copper connector 1 with loop bar 15 1 ends, core bar 14 is connected with water circulation system 18 by copper connector 2 22 with loop bar 15 the other ends, loop bar 15 1 ends are provided with the water inlet pipe 1 be connected with water circulation system 18, the other end is provided with the rising pipe 1 be connected with inductive head 1, core bar 14 1 ends are provided with the water inlet pipe 2 24 be connected with water circulation system 18, the other end is provided with the rising pipe 2 26 be connected with inductive head 1.
Described inductive head 1 comprises circular framework 29, magnetizer, copper connector 3 31, magnetizer is fixedly connected on circular framework 29, the water service pipe 32 be fixed on circular framework 29 communicates with the cavity in circular framework 29, circular framework 29 is provided with jet hole 33, jet hole 33 hole walls become 42～47 ° with curved steel pipe 17 tube walls, and copper connector 3 31 is fixedly connected with circular framework 29.
Described water circulation system 18 comprises water purifying tank, back pool, cooling tower, buffer tank, settling tank, water purifying tank is connected with buffer tank, buffer tank is connected with the water inlet pipe one 23,2 24 of the double-deck copper bar 2 of water coolant, settling tank is connected with back pool, back pool is connected with cooling tower, connecting pipeline is provided with check valve, and it is cursory in described settling tank, to be provided with, and in described back pool and settling tank, is provided with submersible pump; Water coolant flows into buffer tank by water purifying tank, and buffer tank is that the double-deck copper bar of water coolant supplies water, and the water after quenching enters settling tank by pipeline, and the water after precipitation enters back pool through submersible pump, through infiltration, enters water purifying tank, complete one cooling water circulation.
Described cooling tower comprises cooling tower one, cooling tower two, and cooling tower one is connected with medium-high frequency induction quenching transformer 6, is the anti-cold liquid cooling of transformer, and the water coolant after using is back to cooling tower one; Cooling tower two is the cooling of casting furnace electrical system.
By curved lifting steel pipes in the middle of quenching car carriage 11, check inductive head 1 center whether with curved steel pipe 17 centres, as decentraction, the pneumatic support of capable of regulating 7 positions make its essentially concentric; With one heart, quenching car 3 drives by variable-frequency motor 12, and quenching wheel 16 rolls quenching car is retreated on quenching car track 8, in fallback procedures, should fall the pneumatic support 7 that is located at the double-deck copper bar of water coolant 2 middle parts.Inductive head 1 stops advancing while walking to curved steel pipe 17 the other end, and curved steel pipe 17 is enclosed within outside the double-deck copper bar 2 of water coolant fully, during due to the support of 9 pairs of tube walls of Universal caster supporter, make inductive head 1 automatic concentric with curved steel pipe 17.
Embodiment:
Medium-high frequency induction quenching power supply 5 adopts silicon controlled rectifiers, and resonant frequency is 8000Hz, in having guaranteed, Large Diameter Pipeline required electric current and magnetic induction density while quenching.Coordinate the electric capacity of proper amt, realize that power supply is adjustable in the 400-1500kw scope.
Medium-high frequency induction quenching transformer 6 adopts the electric capacity supporting with power supply, and electric capacity also adopts 8000Hz, and realization coordinates with power supply.
The circular framework 29 of inductive head 1 is become by the fire bending of rectangle copper square tube, siliconized plate 30(magnetizer) be bonded in circular framework 29 circumferential surfaces, the water coolant jet hole 33 at 45 ° with the quenching direction of travel arranged on circular framework 29 circumference, copper connector 3 31 is welded on circular framework 29, with the copper connector 1 of the double-deck copper bar 2 of water coolant, is fixedly connected.Water service pipe 32 communicates with circular framework 29, and rising pipe one 25,2 26 is with water service pipe 32 by hose connection, and water coolant can enter through the double-deck copper bar 2 of supercooled water the circular framework 29 of inductive head 1, through jet hole 33 ejections of circular framework 29.
The double-deck copper bar 2 of water coolant flows through the water coolant for quench cooled in core bar 14, between loop bar 15 and intermediate bars 19.The double-deck copper bar 2 of water coolant plays the effect into the inductive head conduction simultaneously.Universal caster supporter 9 is housed on loop bar 15, and bracing frame 27 adopts integrated structure, by fastening piece, connects, convenient installation, replacing and maintenance.Universal caster 10 can be with curved steel pipe 17 rotations, and realize the rolling corresponding thereto of curved steel pipe 17 by Universal caster 10, under ball against spring (resilient material) is arranged, can realize when there is ovality in curved steel pipe 17 also keeping the close contact of Universal caster 10 and curved steel pipe 17, guarantee that the double-deck copper bar 2 of water coolant and inductive head 1 remain concentric with curved steel pipe 17 when producing, make inductive head 1 and curved steel pipe 17 inwalls apart from uniformity, thereby guarantee quenched case thickness, hardness uniformity.
Quenching car track 8 transformer terminal and end present 5 ° of inclination angles, in order to counteracting curved steel pipe 17 slippages that the vibrations that produce cause of advancing in process, guarantee the quenching axial direction due evenly, and facilitate the discharge of water coolant, water coolant can be trapped on quenching car basis 4.Quenching car 3 is advanced on quenching car track 8, and quenching car track 8 two ends are provided with limit switch, realizes under auto state fixing a point start and stop.The carriage 11 of lifting curved steel pipe 17 is housed on quenching car 3, and advancing of quenching car 3 relies on the variable-frequency motor 12 of advancing to be driven.The fallback procedures of quenching car 3 is for to be placed on position to be quenched by curved steel pipe 17, so speed as quickly as possible; And be quenching process in the process of advancing, need speed slower, speed change mechanism can be realized the gait of march adjusting of quenching car 3, improves astern speed, has improved production efficiency.Pneumatic support 7 is housed in quenching car basis 4 and is used for supporting the double-deck copper bar 2 of water coolant, prevent its gravitate and bending.
Automatic control system comprises PLC control automatically, on-line monitoring, indicating meter and operator's console, and the landing of pneumatic support 7 realizes automatically controlling by PLC; On-line monitoring, the variation that can record quenching temperature in per second, thus control this important technical parameter of quenching temperature, and can print by the recording instrument without paper inquiry of indicating meter and operator's console, realize monitoring in real time.
Curved steel pipe 17 is lifted on to quenching car roller 11 middle, check inductive head 1 center whether with curved steel pipe 17 centres, as decentraction, the pneumatic support of capable of regulating 7 positions make its essentially concentric, press automatic button on operator's console, and equipment moves automatically, during this time when exceeded process set value, equipment stops automatically, and the operator can find the problem by data presentation on indicating meter, after solution, can continue to produce.
The double-deck copper bar of the water coolant of the present embodiment 2 external diameters are φ 80, can realize that the curved steel pipe inner wall that internal diameter is greater than to φ 80 quenches.The external diameter of Universal caster supporter 9 is determined according to the curved steel pipe inner wall diameter of waiting to quench.
During the utility model has been realized, the inwall of the curved steel pipe of Large Diameter Pipeline (DN100-DN600) quenches, and guarantee inwall quench after the quench-hardened case even thickness, hardness is even, metallographic structure is fine and closely woven consistent.The double-deck copper bar of water coolant, quenching car, quenching car track are all identical with curved steel pipe radian, make inductive head in the course of the work all the time on curved steel pipe central shaft, have guaranteed uniform quenching; The Universal caster supporter arranged on the double-deck copper bar of water coolant can be adjusted curved steel pipe automatically, makes the double-deck copper bar of curved steel pipe and water coolant coaxial, can be applied to carry containing the more fluid of sandstone, and ore etc., than common curved steel pipe long service life.The energy used in production process only has electric energy and water, does not produce trade effluent, waste gas, waste residue, reaches the energy-conserving and environment-protective requirement.
Claims (8)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203581290U CN203360495U (en) | 2013-06-20 | 2013-06-20 | Quenching equipment for hardening inner wall of bent steel pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203581290U CN203360495U (en) | 2013-06-20 | 2013-06-20 | Quenching equipment for hardening inner wall of bent steel pipe |
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| Publication Number | Publication Date |
|---|---|
| CN203360495U true CN203360495U (en) | 2013-12-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2013203581290U Expired - Lifetime CN203360495U (en) | 2013-06-20 | 2013-06-20 | Quenching equipment for hardening inner wall of bent steel pipe |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108359772A (en) * | 2018-02-01 | 2018-08-03 | 重庆工业职业技术学院 | Heating type metal material low pressure process equipment |
| CN114085979A (en) * | 2021-11-25 | 2022-02-25 | 江南造船(集团)有限责任公司 | Local solution treatment method for stainless steel bent pipe |
-
2013
- 2013-06-20 CN CN2013203581290U patent/CN203360495U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108359772A (en) * | 2018-02-01 | 2018-08-03 | 重庆工业职业技术学院 | Heating type metal material low pressure process equipment |
| CN114085979A (en) * | 2021-11-25 | 2022-02-25 | 江南造船(集团)有限责任公司 | Local solution treatment method for stainless steel bent pipe |
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Granted publication date: 20131225 |