CN208185663U - A kind of long-life expansion joint for blast furnace hot air duct - Google Patents
A kind of long-life expansion joint for blast furnace hot air duct Download PDFInfo
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- CN208185663U CN208185663U CN201820551168.5U CN201820551168U CN208185663U CN 208185663 U CN208185663 U CN 208185663U CN 201820551168 U CN201820551168 U CN 201820551168U CN 208185663 U CN208185663 U CN 208185663U
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- bellows
- ring
- blast furnace
- expansion joint
- elastic reinforcement
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Abstract
A kind of long-life expansion joint for blast furnace hot air duct, including bellows, bellows is interior to be equipped with end pipe, further includes elastic reinforcement ring, for elastic reinforcement ring ring set at each wave base of bellows, the cross sectional shape of elastic reinforcement ring is ellipse.Flexible oval cross section annular reinforcing ring is arranged in the wave base of bellows in the utility model, and when pipe temperature raising, tube body expanded by heating, bellows compression compression deformation, oval cross section participates in compressive deformation, and oval cross section becomes flat from rousing circle at this time.In this way, the bearing capacity of bellows not only can be improved, but also there is compressible flex capability in the axial direction, overcomes the drawbacks of conventional rigid bearing ring can only improve bellows bearing capacity but reduce bellows significant wave height.It ensure that the operation steady in a long-term of blast furnace using the utility model, reduction blast furnace burst damping down number avoids hot wind master, the expansion joint of branch pipe(tube) setting cracks, is rubescent, burns the serious accident generation for jeopardizing personal safety.
Description
Technical field
The utility model relates to a kind of components for pipe-line system, are especially used for the longevity of blast furnace hot air duct
Order expansion joint.
Background technique
Blast furnace hot air duct is that the hot-air of about 1450 DEG C of hot wind in-furnace temperature, pressure about 0.5MPa are sent into blast furnace
In burner hearth.The thermal walking used for expansion joint in compensation pipeline being mounted on hot air duct, long-term work is in high pressure, the condition of high temperature.
It since the expansion joint of hot air duct is outdoor operation, and is intermitten, frequently, this requires described swollen for temperature, pressure variation
Swollen section not only has high bearing capacity, it is often more important that must have compared with high fatigue life.Currently, domestic 1080 cubic metres are arrived
5500 cubic metres of blast furnace, the diameter of hot air duct is 2200-3100 millimeters, to meet bearing requirements, in the swollen of hot air duct
Bearing ring is set on swollen section, and the bearing ring of existing structure is as shown in figure 3, the bearing ring 6 of rigid circular section is located at the wave of bellows
Bottom.This ordinary construction the problem is that: reduce the significant wave height of bellows, drop the fatigue life of expansion joint significantly
It is low, in order to guarantee the fatigue life of expansion joint, wave number can only be increased, and generally cannot achieve wave in limited installation space
Several increases, the expansion joint for eventually leading to hot air duct are not achieved the requirement in generation furnace life and occur as soon as failure.
Utility model content
The purpose of this utility model is that aiming at the disadvantages of the prior art, provides a kind of high pressure resistant and do not reduce bellows and have
Imitate the long-life expansion joint for blast furnace hot air duct of wave height.
Problem described in the utility model is realized with following technical proposals:
A kind of long-life expansion joint for blast furnace hot air duct, including bellows, bellows is interior to be equipped with end pipe, also
Including elastic reinforcement ring, for elastic reinforcement ring ring set at each wave base of bellows, the cross sectional shape of elastic reinforcement ring is ellipse.
The above-mentioned long-life expansion joint for blast furnace hot air duct, the length of the elliptic cross-section of the elastic reinforcement ring
It is b that shaft size, which is a minor axis dimension, the distance ruler of the crest height of bellows having a size of H, between two sides of each wave base of bellows
Very little is L, then: H=(0.8~0.9) a, L=b+ (1~2) millimeter.
The above-mentioned long-life expansion joint for blast furnace hot air duct, the elastic reinforcement ring are thin-walled austenite stainless
Steel material, the wall thickness of elastic reinforcement ring are 3~4 millimeters.
The utility model has the elastic reinforcement ring of oval cross section annular in the trough setting of bellows, and elastic reinforcement ring is adopted
It is made of thin-walled austenitic stainless steel, when pipe temperature raising, tube body expanded by heating, bellows compression compression deformation, elasticity adds
Strong ring oval cross section participates in compressive deformation, and oval cross section becomes flat from rousing circle at this time.In this way, bellows not only can be improved
Bearing capacity, and there is compressible flex capability in the axial direction, ripple can only be improved by overcoming conventional rigid reinforcing ring
The drawbacks of pipe bearing capacity but reduction bellows significant wave height.It ensure that the operation steady in a long-term of blast furnace using the utility model,
Blast furnace burst damping down number is reduced, avoids hot wind master, the expansion joint of branch pipe(tube) setting cracks, is rubescent, burning and jeopardize personal peace
Full serious accident occurs.
Detailed description of the invention
The utility model is described in further detail with reference to the accompanying drawing.
Fig. 1 is the structural schematic diagram of the utility model；
Fig. 2 is the partial enlarged view in Fig. 1 at A；
Fig. 3 is the schematic diagram of existing blast furnace hot air duct expansion joint.
Each list of reference numerals in figure are as follows: 1, play hanging piece, 2, end pipe, 3, bellows, 4, elastic reinforcement ring, 5, locating piece, 6, hold
Pressure ring.
Specific embodiment
Referring to Fig. 1, Fig. 2, the utility model includes bellows 3, and end pipe 2 is equipped in bellows, and end pipe inner wall is equipped with anchoring
Locating piece 5 is respectively set in part, the both ends of bellows, and each locating piece is fixed with the both ends of bellows respectively, in the outer of each locating piece
End has further respectively had hanging piece 1, and respectively with end pipe soldering, the side plate of each hanging piece determines with neighbouring respectively for the bottom of each hanging piece
Position part soldering.The utility model further includes the elastic reinforcement ring 4 of annular, and each matched ring set of elastic reinforcement ring is in each of bellows
At wave base.Elastic reinforcement ring is made of thin-walled austenite stainless steel material, has biggish elastic deformability, and can be with
High temperature resistant.The wall thickness of elastic reinforcement ring is 3~4 millimeters.The cross sectional shape of elastic reinforcement ring is ellipse, the length of elliptic cross-section
It is b that shaft size, which is a minor axis dimension, the distance ruler of the crest height of bellows having a size of H, between two sides of each wave base of bellows
Very little is L, then has following size relationships: H=(0.8~0.9) a, L=b+ (1~2) millimeter.
With the round bearing ring of the elastic reinforcement ring substitution rigidity of oval cross section, the pressure-bearing of bellows on the one hand can be improved
Performance, on the other hand when pipe temperature raising, tube body expanded by heating, bellows compression compression deformation, elastic reinforcement ring is squeezed
Deformation, oval cross section become flat from rousing circle, i.e. the elastic reinforcement ring compressive deformation that takes part in bellows, therefore will not reduce wave
The significant wave height of texel part substantially increases expansion joint service life while effect guarantees the bearing capacity of expansion joint.
Claims (3)
1. a kind of long-life expansion joint for blast furnace hot air duct, including bellows (3), bellows is interior to be equipped with end pipe
(2), it is characterised in that: further include elastic reinforcement ring (4), elastic reinforcement ring ring set is at each wave base of bellows, elastic reinforcement
The cross sectional shape of ring is ellipse.
2. the long-life expansion joint according to claim 1 for blast furnace hot air duct, it is characterised in that: the bullet
It is b that the major axis dimension of the elliptic cross-section of property reinforcing ring, which is a minor axis dimension, and for the crest height of bellows having a size of H, bellows is each
Spacing dimension between the side Liang Ge of the lowest point is L, then has following size relationships: H=(0.8~0.9) a, L=b+ (1~2) milli
Rice.
3. the long-life expansion joint according to claim 2 for blast furnace hot air duct, it is characterised in that: the bullet
Property reinforcing ring be thin-walled austenite stainless steel material, the wall thickness of elastic reinforcement ring is 3~4 millimeters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820551168.5U CN208185663U (en) | 2018-04-18 | 2018-04-18 | A kind of long-life expansion joint for blast furnace hot air duct |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820551168.5U CN208185663U (en) | 2018-04-18 | 2018-04-18 | A kind of long-life expansion joint for blast furnace hot air duct |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208185663U true CN208185663U (en) | 2018-12-04 |
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ID=64433977
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820551168.5U Active CN208185663U (en) | 2018-04-18 | 2018-04-18 | A kind of long-life expansion joint for blast furnace hot air duct |
Country Status (1)
| Country | Link |
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| CN (1) | CN208185663U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111473169A (en) * | 2020-04-14 | 2020-07-31 | 吴航君 | Breathing type telescopic pipeline |
-
2018
- 2018-04-18 CN CN201820551168.5U patent/CN208185663U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111473169A (en) * | 2020-04-14 | 2020-07-31 | 吴航君 | Breathing type telescopic pipeline |
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