CN204251657U - A kind of inflation Cover members eliminating steel pipe internal-surface oxidation - Google Patents
A kind of inflation Cover members eliminating steel pipe internal-surface oxidation Download PDFInfo
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- CN204251657U CN204251657U CN201420716946.3U CN201420716946U CN204251657U CN 204251657 U CN204251657 U CN 204251657U CN 201420716946 U CN201420716946 U CN 201420716946U CN 204251657 U CN204251657 U CN 204251657U
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Abstract
A kind of inflation Cover members eliminating steel pipe internal-surface oxidation, comprise gas-flow closure end cap, inflation connecting hole, air spring bore, sealed spheroid, air spring and spring seat board, it and exhaust end cover part fits use, before heat treatment, inflation Cover members and exhaust end cover parts are arranged in the two ends endoporus of pending steel pipe respectively hermetically, by the inner chamber charged pressure nitrogen of inflation Cover members to steel pipe, drained in steel pipe inner chamber by the exhaust sheet on exhaust end cover parts and have air, then can heat-treat.Steel pipe, when thermal treatment, due to anaerobic in steel pipe inner chamber, therefore would not produce zone of oxidation, and meanwhile, in heat treatment process, the gas in body can expand, and pressure can raise, but carries out release by one-way exhaust valve, can ensure heat treated security.
Description
Technical field:
The utility model relates to steel pipe heat treatment auxiliary device, particularly relates to the supplementary unit used in the normalizing thermal treatment of steel pipe, quenching heat treatment and tempering heat treatment.
Background technology:
Steel pipe is the widely used essential products in field such as petrochemical complex, boiler, pipeline conveying, its production is of a great variety, Application Areas is extensive, for most steel pipe, particularly High Tensile Steel Tube, low alloy steel, high alloy and stainless steel tube etc. all need to heat-treat, and make it reach the mechanical performance index of standard-required.In heat treatment process, heat temperature raising must be carried out to steel pipe, although normalizing, the heat treated temperature of Quench and temper are different, under hot conditions, steel pipe surfaces externally and internally all can produce redox reaction with oxygen in air, forms one deck oxide skin at steel pipe surfaces externally and internally.Oxide skin treatment method for outer surface of steel tube is relatively easy, can be eliminated by measures such as barreling, sandblasting, ball blasts, is then difficult to process, can be removed, but cost is high, efficiency is low for large-diameter steel pipe by honing for internal surface oxide skin.Must adopt acid cleaning process for small-caliber steel pipe, the environmental pollution of this method is very large, and processing cost is higher.Although the existing report adopting anaerobic heat treatment furnace to heat-treat steel pipe, equipment investment is huge, and technological transformation difficulty is large, and running cost is high, and processing requirement is also very high, and existing steel pipe's production enterprise is difficult to accept.
Existing steel pipe's production enterprise more wishes a kind of protector eliminating steel pipe internal-surface oxidation, and it on the basis of existing production line, can carry out normal thermal treatment for steel pipe.
For this reason; applicant has developed a kind of thermal treatment protector eliminating steel pipe internal-surface oxidation; as shown in Fig. 1 ~ Fig. 6; comprise inflation Cover members 1, pending steel pipe 2 and exhaust end cover parts 3, inflation Cover members 1 and exhaust end cover parts 3 are arranged in the two ends endoporus of pending steel pipe 2 respectively hermetically.
Before Steel Pipe Heat process, inflation Cover members 1 and exhaust end cover parts 3 are arranged in the two ends endoporus of pending steel pipe 2 respectively hermetically, nitrogen is filled with to the inner chamber of pending steel pipe 2 by the inflation connecting hole 12 on inflation Cover members 1, after the air pressure of steel pipe inner chamber is greater than making a concerted effort of the elastic force of ambient pressure and exhaust spring, the exhaust sheet that pressed gas promotes on exhaust component is outwardly vented, the air had in steel pipe inner chamber is drained by passing into pressure nitrogen gas, after the air in steel pipe inner chamber drains, can heat-treat.
Due to before pending Steel Pipe Heat process, carry out sealing the endoporus blocking pending steel pipe 2 two ends with inflation Cover members 1 and exhaust end cover parts 3 respectively, steel tube inner hole is formed and extraneous sealed structure, by inflation Cover members 1 on inflation connecting hole 12 to its in charged pressure nitrogen, when the air pressure of steel pipe inner chamber is greater than making a concerted effort of the elastic force of ambient pressure and exhaust spring 35, the exhaust sheet 33 that pressed gas promotes on exhaust component 3 is outwardly vented, the air had in steel pipe inner chamber is drained by passing into pressure nitrogen gas, after the air in steel pipe inner chamber drains, stop logical nitrogen, exhaust sheet 33 automatically closes under exhaust spring 35 and ambient pressure effect, now can heat-treat.When heating heat-treated by steel pipe, owing to not having oxygen in steel pipe inner chamber, although the temperature of body reaches 300 DEG C ~ 800 DEG C, tube cavity also can not produce oxidation, therefore, it is possible to eliminate steel tube inner hole to produce zone of oxidation, reaches the technique effect of anaerobic process.In heat treatment process, the nitrogen in steel pipe also can expand, and after pressure raises, pressed gas then can by opening one-way exhaust sheet automatically, and the pressure gas in pipe is known from experience automatically excessive until balance, therefore, is also safe in heat treatment process.In the thermal treatment protector of this elimination steel pipe internal-surface oxidation, inflation Cover members 1 and exhaust end cover parts 3 are two key parts.
Utility model content:
The purpose of this utility model is to provide a kind of inflation Cover members eliminating steel pipe internal-surface oxidation.
The technical scheme that the utility model is taked is as follows:
A kind of inflation Cover members eliminating steel pipe internal-surface oxidation, it is characterized in that: comprise gas-flow closure end cap, inflation connecting hole, air spring bore, sealed spheroid, air spring and spring seat board, inflation connecting hole and air spring bore coaxially distribute, the aperture of air spring bore is greater than inflation connecting hole, both are provided with sealing cone in junction, sealed spheroid is arranged in air spring bore, air spring one end contacts with sealed spheroid, and the other end is by the spring seat board axial limiting be fixed on gas-flow closure end cap inner face.
Further, the sealing cylindrical of gas-flow closure end cap is provided with radial seal groove, in radial seal groove, is provided with sealing member.
In the thermal treatment protector eliminating steel pipe internal-surface oxidation, described exhaust end cover parts comprise exhaust sealing end cap, inner vent, exhaust sheet, connect bore, exhaust spring and setting nut, inner vent be connected bore and coaxially distribute, the axis collinear of its axis and exhaust sealing end cap, connection bore is threaded hole, be provided with in inner vent and the junction being connected bore and the seal face being vented sheet and being combined, exhaust sheet is all sleeved on exhaust spring and is connected in bore, setting nut is screwed in and connects in bore, exhaust spring is between exhaust sheet and setting nut, setting nut is provided with outer vent, outer vent is arranged between the both ends of the surface of setting nut, be provided with exhaust spring bore at setting nut center and screw force hole, outer vent is arranged on exhaust spring bore and screws between force hole, the described cross-sectional shape screwing force hole is regular polygon.The sealing cylindrical of exhaust sealing end cap is provided with radial seal groove, in radial seal groove, is provided with sealing member.
The using method eliminating the thermal treatment protector of steel pipe internal-surface oxidation is as follows:
Before Steel Pipe Heat process, inflation Cover members and exhaust end cover parts are arranged in the two ends endoporus of pending steel pipe respectively hermetically, nitrogen is filled with to the inner chamber of pending steel pipe by the inflation connecting hole on inflation Cover members, after the air pressure of pending steel pipe inner chamber is greater than making a concerted effort of the elastic force of ambient pressure and exhaust spring, the exhaust sheet that pressed gas promotes on exhaust end cover parts is outwardly vented, the air had in pending steel pipe inner chamber is drained by passing into pressure nitrogen gas, after the air in pending steel pipe inner chamber drains, can heat-treat.
Due to before pending Steel Pipe Heat process, carry out sealing the endoporus blocking pending steel pipe two ends with inflation Cover members and exhaust end cover parts respectively, pending steel tube inner hole is formed and extraneous sealed structure, by the inflation connecting hole on inflation Cover members to charged pressure nitrogen in it, when the air pressure of pending steel pipe inner chamber is greater than making a concerted effort of the elastic force of ambient pressure and exhaust spring, the exhaust sheet that pressed gas promotes on exhaust end cover parts is outwardly vented, the air had in pending steel pipe inner chamber is drained by passing into pressure nitrogen gas, after the air in pending steel pipe inner chamber drains, stop logical nitrogen, exhaust sheet automatically closes under exhaust spring and ambient pressure effect, now can heat-treat.When heating heat-treated by pending steel pipe, owing to not having oxygen in pending steel pipe inner chamber, although the temperature of body reaches 300 DEG C ~ 800 DEG C, tube cavity also can not produce oxidation, therefore, it is possible to eliminate pending steel tube inner hole to produce zone of oxidation, reach the technique effect of anaerobic process.In heat treatment process, the nitrogen in body also can expand, and after pressure raises, pressed gas then can promote the exhaust sheet on exhaust end cover parts, and the pressure gas in pipe is known from experience automatically excessive until balance, therefore, is also safe in heat treatment process.
Accompanying drawing illustrates:
Fig. 1 is the structural representation of the thermal treatment protector eliminating steel pipe internal-surface oxidation;
Fig. 2 is a kind of structural representation of the present utility model;
Fig. 3 is the structural representation of gas-flow closure end cap in Fig. 2;
Fig. 4 is the structural representation of exhaust end cover parts;
Fig. 5 is the structural representation of exhaust sealing end cap in Fig. 4;
Fig. 6 is the structural representation of setting nut in Fig. 4;
In figure, 1-inflates Cover members; The pending steel pipe of 2-; 3-exhaust end cover parts; 4-radial seal groove; 5-sealing member; 11-gas-flow closure end cap; 12-inflates connecting hole; 13-air spring bore; 14-sealed spheroid; 15-air spring; 16-spring seat board; 17-sealing cone; 31-exhaust sealing end cap; 32-inner vent; 33-is vented sheet; 34-connects bore; 35-exhaust spring; 36-setting nut; 37-seal face; 38-outer vent; 361-exhaust spring bore; 362-screws force hole.
Embodiment:
Illustrate embodiment of the present utility model below:
Embodiment 1:
A kind of inflation Cover members eliminating steel pipe internal-surface oxidation, comprise gas-flow closure end cap 11, inflation connecting hole 12, air spring bore 13, sealed spheroid 14, air spring 15 and spring seat board 16, inflation connecting hole 12 coaxially distributes with air spring bore 13, the aperture of air spring bore 13 is greater than inflation connecting hole 12, both are provided with sealing cone 17 in junction, sealed spheroid 14 is arranged in air spring bore 13, air spring 15 one end contacts with sealed spheroid 14, the other end is by spring seat board 16 axial limiting be fixed on gas-flow closure end cap 11 inner face, the sealing cylindrical of gas-flow closure end cap 11 is provided with radial seal groove 4, sealing member 5 is provided with in radial seal groove 4.
The thermal treatment protector of the elimination steel pipe internal-surface oxidation of applicant's development, by inflation Cover members 1, pending steel pipe 2 and exhaust end cover parts 3 form, inflation Cover members 1 and exhaust end cover parts 3 are arranged in the two ends endoporus of pending steel pipe 2 respectively hermetically, described exhaust end cover parts 3 are by exhaust sealing end cap 31, inner vent 32, exhaust sheet 33, connect bore 34, exhaust spring 35 and setting nut 36 form, inner vent 32 be connected bore 34 and coaxially distribute, the axis collinear of its axis and exhaust sealing end cap 31, connecting bore 34 is threaded hole, be provided with in inner vent 32 and the junction being connected bore 34 and the seal face 37 being vented sheet 33 and being combined, exhaust sheet 33 is all sleeved on exhaust spring 35 and is connected in bore 34, setting nut 36 is screwed in and connects in bore 34, exhaust spring 35 is between exhaust sheet 33 and setting nut 36, setting nut 36 is provided with outer vent 38, outer vent 38 is arranged between the both ends of the surface of setting nut 36, be provided with exhaust spring bore 361 at setting nut 36 center and screw force hole 362, outer vent 38 is arranged on exhaust spring bore 361 and screws between force hole 362, described in screw force hole 362 cross-sectional shape be regular hexagon, the sealing cylindrical of exhaust sealing end cap 31 is provided with radial seal groove 4, in radial seal groove 4, is provided with sealing member 5.
The using method of the thermal treatment protector of this elimination steel pipe internal-surface oxidation is as follows:
Before Steel Pipe Heat process, inflation Cover members 1 and exhaust end cover parts 3 are arranged in the endoporus at pending steel pipe 2 two ends respectively hermetically, nitrogen is filled with to the inner chamber of pending steel pipe 2 by the inflation connecting hole 12 on inflation Cover members 1, when the air pressure of pending steel pipe 2 inner chamber is greater than the elastic force sum of ambient pressure and exhaust spring 35, the exhaust sheet 33 that pressed gas promotes on exhaust end cover parts 3 is outwardly vented, the air had in pending steel pipe 2 inner chamber is drained by passing into pressure nitrogen gas, after the air in pending steel pipe 2 inner chamber drains, can heat-treat.
Claims (2)
1. eliminate the inflation Cover members of steel pipe internal-surface oxidation for one kind, it is characterized in that: comprise gas-flow closure end cap (11), inflation connecting hole (12), air spring bore (13), sealed spheroid (14), air spring (15) and spring seat board (16), inflation connecting hole (12) and air spring bore (13) coaxially distribute, the aperture of air spring bore (13) is greater than inflation connecting hole (12), both are provided with sealing cone (17) in junction, sealed spheroid (14) is arranged in air spring bore (13), air spring (15) one end contacts with sealed spheroid (14), the other end is by spring seat board (16) axial limiting be fixed on gas-flow closure end cap (11) inner face.
2. eliminate the inflation Cover members of steel pipe internal-surface oxidation according to claim 1, it is characterized in that: on the sealing cylindrical of gas-flow closure end cap (11), be provided with radial seal groove (4), in radial seal groove (4), be provided with sealing member (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420716946.3U CN204251657U (en) | 2014-11-25 | 2014-11-25 | A kind of inflation Cover members eliminating steel pipe internal-surface oxidation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420716946.3U CN204251657U (en) | 2014-11-25 | 2014-11-25 | A kind of inflation Cover members eliminating steel pipe internal-surface oxidation |
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| Publication Number | Publication Date |
|---|---|
| CN204251657U true CN204251657U (en) | 2015-04-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420716946.3U Expired - Fee Related CN204251657U (en) | 2014-11-25 | 2014-11-25 | A kind of inflation Cover members eliminating steel pipe internal-surface oxidation |
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| CN (1) | CN204251657U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108774678A (en) * | 2018-06-26 | 2018-11-09 | 成都先进金属材料产业技术研究院有限公司 | The heat treatment method of super 13Cr tubing and casings |
| CN113265524A (en) * | 2021-05-19 | 2021-08-17 | 哈尔滨电机厂有限责任公司 | High-temperature anti-oxidation method for forging and welding shaft part sliding rotor |
| CN115198060A (en) * | 2022-07-14 | 2022-10-18 | 大庆市龙兴石油机械有限公司 | Inner wall laser heat treatment oil pipe |
-
2014
- 2014-11-25 CN CN201420716946.3U patent/CN204251657U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108774678A (en) * | 2018-06-26 | 2018-11-09 | 成都先进金属材料产业技术研究院有限公司 | The heat treatment method of super 13Cr tubing and casings |
| CN113265524A (en) * | 2021-05-19 | 2021-08-17 | 哈尔滨电机厂有限责任公司 | High-temperature anti-oxidation method for forging and welding shaft part sliding rotor |
| CN115198060A (en) * | 2022-07-14 | 2022-10-18 | 大庆市龙兴石油机械有限公司 | Inner wall laser heat treatment oil pipe |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150408 Termination date: 20211125 |