CN204251659U - A kind of exhaust end cover parts eliminating steel pipe internal-surface oxidation - Google Patents
A kind of exhaust end cover parts eliminating steel pipe internal-surface oxidation Download PDFInfo
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- CN204251659U CN204251659U CN201420717482.8U CN201420717482U CN204251659U CN 204251659 U CN204251659 U CN 204251659U CN 201420717482 U CN201420717482 U CN 201420717482U CN 204251659 U CN204251659 U CN 204251659U
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- Prior art keywords
- exhaust
- steel pipe
- bore
- setting nut
- spring
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 81
- 239000010959 steel Substances 0.000 title claims abstract description 81
- 238000010301 surface-oxidation reaction Methods 0.000 title claims abstract description 18
- 238000007789 sealing Methods 0.000 claims abstract description 28
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 abstract description 25
- 238000000034 method Methods 0.000 abstract description 21
- 238000010438 heat treatment Methods 0.000 abstract description 13
- 239000007789 gas Substances 0.000 abstract description 10
- 229910052757 nitrogen Inorganic materials 0.000 abstract description 10
- 238000007669 thermal treatment Methods 0.000 abstract description 10
- 230000003647 oxidation Effects 0.000 abstract description 5
- 238000007254 oxidation reaction Methods 0.000 abstract description 5
- 230000001012 protector Effects 0.000 description 8
- 229910001873 dinitrogen Inorganic materials 0.000 description 5
- 230000002153 concerted effect Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 230000008030 elimination Effects 0.000 description 3
- 238000003379 elimination reaction Methods 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 229910000851 Alloy steel Inorganic materials 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 238000010791 quenching Methods 0.000 description 2
- 239000002253 acid Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 238000006479 redox reaction Methods 0.000 description 1
- 238000005488 sandblasting Methods 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 238000005496 tempering Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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- Heat Treatment Of Articles (AREA)
- Exhaust Silencers (AREA)
Abstract
A kind of exhaust end cover parts eliminating steel pipe internal-surface oxidation, comprise exhaust sealing end cap, inner vent, exhaust sheet, connect bore, exhaust spring and setting nut, exhaust sheet is all sleeved on exhaust spring and is connected in bore, setting nut is screwed in and connects in bore, exhaust spring exhaust sheet and setting nut between, setting nut is provided with outer vent, it with inflation Cover members with the use of; Before heat treatment, inflation Cover members and exhaust end cover parts are arranged on respectively hermetically in the endoporus of pending steel pipe two ends, be filled with nitrogen by inflation Cover members to steel pipe inner chamber, drained the air in steel pipe inner chamber by the exhaust sheet on exhaust end cover parts, 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 steel pipe 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 exhaust end cover parts eliminating steel pipe internal-surface oxidation, it is characterized in that: 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.
Further, be provided with exhaust spring bore and screw force hole at setting nut center, outer vent is arranged on exhaust spring bore and screws between force hole.
Further, the cross-sectional shape screwing force hole described in is regular polygon.
Further, the sealing cylindrical of exhaust sealing 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 inflation Cover members comprises 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, the other end is by the spring seat board axial limiting be fixed on gas-flow closure end cap inner face, the sealing cylindrical of gas-flow closure end cap is provided with radial seal groove, sealing member is provided with in radial seal groove.
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 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 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 exhaust sealing end cap in Fig. 2;
Fig. 4 is the structural representation of setting nut in Fig. 2;
Fig. 5 is the structural representation of inflation Cover members;
Fig. 6 is the structural representation of gas-flow closure end cap in Fig. 5;
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 exhaust end cover parts eliminating steel pipe internal-surface oxidation, comprise exhaust sealing end cap 31, inner vent 32, exhaust sheet 33, connect bore 34, exhaust spring 35 and setting nut 36, 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.The described cross-sectional shape screwing force hole 362 is regular polygon.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 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 inflation Cover members 1 is by gas-flow closure end cap 11, inflation connecting hole 12, spring base hole 13, sealed spheroid 14, air spring 15 and spring seat board 16 form, inflation connecting hole 12 coaxially distributes with spring base hole 13, the aperture of spring base hole 13 is greater than inflation connecting hole 12, both are provided with sealing cone 17 in junction, sealed spheroid 14 is arranged in spring base hole 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, 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 (4)
1. eliminate the exhaust end cover parts of steel pipe internal-surface oxidation for one kind, it is characterized in that: comprise exhaust sealing end cap (31), inner vent (32), exhaust sheet (33), connect bore (34), exhaust spring (35) and setting nut (36), 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 combining, 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 positioned 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).
2. eliminate the exhaust end cover parts of steel pipe internal-surface oxidation according to claim 1, it is characterized in that: 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).
3. according to claim 2 eliminate steel pipe internal-surface oxidation exhaust end cover parts, it is characterized in that: described in screw force hole (362) cross-sectional shape be regular polygon.
4. eliminate the exhaust end cover parts of steel pipe internal-surface oxidation according to claim 1, it is characterized in that: on the sealing cylindrical of exhaust sealing end cap (31), 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 |
|---|---|---|---|
| CN201420717482.8U CN204251659U (en) | 2014-11-25 | 2014-11-25 | A kind of exhaust end cover parts eliminating steel pipe internal-surface oxidation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420717482.8U CN204251659U (en) | 2014-11-25 | 2014-11-25 | A kind of exhaust end cover parts eliminating steel pipe internal-surface oxidation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204251659U true CN204251659U (en) | 2015-04-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420717482.8U Expired - Fee Related CN204251659U (en) | 2014-11-25 | 2014-11-25 | A kind of exhaust end cover parts eliminating steel pipe internal-surface oxidation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204251659U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108792436A (en) * | 2018-07-25 | 2018-11-13 | 宁夏国励汽车动力科技有限公司 | Sealed boring cover |
-
2014
- 2014-11-25 CN CN201420717482.8U patent/CN204251659U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108792436A (en) * | 2018-07-25 | 2018-11-13 | 宁夏国励汽车动力科技有限公司 | Sealed boring cover |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150408 Termination date: 20211125 |
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| CF01 | Termination of patent right due to non-payment of annual fee |