CN2344636Y - Universal corrugated expansion joint for pressure steel pipe of hydraulic power station - Google Patents
Universal corrugated expansion joint for pressure steel pipe of hydraulic power station Download PDFInfo
- Publication number
- CN2344636Y CN2344636Y CN 98227608 CN98227608U CN2344636Y CN 2344636 Y CN2344636 Y CN 2344636Y CN 98227608 CN98227608 CN 98227608 CN 98227608 U CN98227608 U CN 98227608U CN 2344636 Y CN2344636 Y CN 2344636Y
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- CN
- China
- Prior art keywords
- flexible metal
- expansion joint
- pipe
- steel pipe
- pressure steel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model relates to an expansion joint for the pressure steel pipe of a hydroelectric station, composed of at least one U-shaped flexible metal corrugated pipe and connecting pipes at two ends. The two ends of the flexible metal corrugated pipe are respectively connected with the outer walls of the connecting pipes at the two ends, and the wave hollows of the flexible metal corrugated pipe and the two outer end walls of the flexible metal corrugated pipe are provided with strengthening rings. The flexible metal corrugated pipe is provided with a wear-resistant flow guide cylinder whose inner diameter is as the same as the inner diameter of the connecting pipes at the two ends, and one end of the medium flow-in direction of the flow guide cylinder is connected with the connecting pipe at the corresponding end to be an integrity. The utility model has the advantages of no leakage, no head loss, no maintenance need and long service life and can absorb the relatively big displacement amount at various directions.
Description
The utility model relates to the expansion joint that a kind of hydropower station pressure steel pipe is used.
In the water power plant, from the pressure conduit of reservoir (forebay or surge-chamber) to the water turbine diversion, claim penstock or high pressure pipe line again, be characterized in that the gradient is steep, directly bear water hammer, internal water pressure is very big, the lateral displacement that must adopt expansion joint to come axial displacement that the absorption pressure steel pipe produces because of temperature influence and take place because of reasons such as structure foundation depressions, and be convenient to the installation of penstock.Existing penstock usually adopts telescopic expansion joint, and it generally is made up of sleeve pipe, insertion tube and sealing material and relief frame, and sleeve pipe and insertion tube slide mutually, inserts filler such as asbestos packing between the mouth of pipe of sleeve pipe and insertion tube and comes hermetic seal.This structures shape its exist easily and shortcoming such as leak, energy loss is big, absorb subsidence of foundations displacement difficulty, easy-maintaining, working life be not short.Up to the present, the expansion joint of bellows structure formula did not also appear in used expansion joint on the hydropower station pressure steel pipe.
The purpose of this utility model is exactly in order to address the above problem, and provides a kind of and does not have leakages, no head loss, Maintenance free, long service life, also can absorb the hydropower station pressure steel pipe universal type corrugated expansion joint than big displacement quantity of various directions.
Technical solution of the present utility model:
A kind of hydropower station pressure steel pipe universal type corrugated expansion joint, it is characterized in that it is made up of the U type flexible metal bellows of at least one joint and the adapter at two ends, the two ends of flexible metal bellows link to each other with the outer wall of two pipe nipples respectively, and reach two outer end wall in each trough of flexible metal bellows and be equipped with stiffening ring, the one internal diameter wear-resisting guide shell identical with two pipe nipple internal diameters arranged in the bellows of flexible metal, and an end of the MEDIA FLOW Inbound of this guide shell is connected as a single entity with corresponding pipe nipple the inner.
Expansion joint of the present utility model adopts the U-shaped corrugated stainless steel tubing and cooperates stiffening ring to bear higher pressure, comes the axial displacement and the lateral displacement of absorption pressure steel pipe with the combination of two sections bellowss.It is simple that the U-shaped bellows has processing, low cost of manufacture, and compensation rate is big, and bearing capacity is than advantages such as height.Absorb the lateral deformation of displacement greatly owing to adopted duplex, this expansion joint to be specially adapted to, also can be used for absorbing axial displacement, angular displacement and any, therefore be called the universal type corrugated expansion joint by the synthetic displacement of these three kinds of forms.Expansion joint of the present utility model is owing to adopted full-closed structure, and guide shell is identical with the adapter internal diameter, and its core parts--bellows is protected by oversheath, to avoid the erosion of environment.Therefore, expansion joint does not exist leakage, Maintenance free, no throttling, the loss of no head, erosion resistance, long service life, and compensation rate is big, can absorb the displacement of various directions well.So can reduce engineering cost greatly, have remarkable economic efficiency and social benefit.
Fig. 1 is a structural representation of the present utility model.
As Fig. 1, the utility model is made up of the U type flexible metal bellows 1 of at least one joint and the adapter 2 at two ends, the two ends of flexible metal bellows 1 link to each other with the outer wall of two pipe nipples 2 respectively, and in each trough of flexible metal bellows 1 and two outer end wall be equipped with stiffening ring 3,3 ', one internal diameter and the identical wear-resisting guide shell 4 of two pipe nipples, 2 internal diameters are arranged in the flexible metal bellows 1, and an end of the MEDIA FLOW Inbound of this guide shell 4 is connected as a single entity with a corresponding pipe nipple 2 the inners.
In the utility model, should whole closely be fixed with separately transitional pipe segment 5 at the outer wall of two pipe nipples 2, the two ends of flexible metal bellows 1 just with the inner fixed seal connection of two transitional pipe segment 5.Transitional pipe segment 5 be for guarantee to take over 2 with the intensity of wear-resisting guide shell 4 overlap joint sections, can prevent the interference phenomenon between wear-resisting guide shell 4 and the metal bellows 1 simultaneously again.
Stiffening ring 3 in flexible metal of the present utility model bellows 1 each trough is that the semicircular ring at two ends is formed, it is one that attachment strap 6 solid weldings are adopted in their joint, can increase the intensity of stiffening ring 3 so on the one hand, can reduce boundary dimension again on the other hand, the stiffening ring 3 of 1 liang of outer end wall of metal bellows ' be whole annulus, their difference solid weldings are on the outer wall of two corresponding transitional pipe segment 5.
Expansion joint of the present utility model preferably adopts by two single metal bellow type expansion joints and composes in series, and only the corresponding end adapter 2 of two single metal bellow type expansion joints need be fused gets final product.The expansion joint of this serial connection can increase the ability that absorbs lateral displacement greatly, and the axial displacement uptake also is the uptake sum of two single expansion joints.
Because metal bellows 1 is a flexible member, then the utility model can be equipped with otic placode 7 on two ends transitional pipe segment 5, is connected with lower link bar 8 between them, to be used for the fixing of transportation process.
Expansion joint of the present utility model is an all-sealed structure, link to each other with penstock by two pipe nipples 2, the axial displacement that stretching by two sections metal bellowss 1 or compression come the absorption pressure steel pipe, come the lateral displacement of absorption pressure steel pipe by the angular deflection of bellows 1, and the centre distance of two sections bellowss 1 is big more, and the ability that then absorbs lateral displacement is big more.When the water of hydropower reservoir station passes through penstock (direction shown in arrow among Fig. 1), can be because of temperature effect generation axial displacement or because of structure foundation depression generation lateral displacement, behind the utility model cut-in pressure steel pipe, its axial displacement is absorbed by the compression or the stretching of metal bellows 1, its lateral displacement is absorbed by the angular distortion of bellows 1, thereby has guaranteed that whole penstock normally uses.In the utility model, because bellows 1 is raised, bellows 1 fuses by transitional pipe segment 5 and adapter 2, do not reducing to take over thickness, do not reducing under its intensity prerequisite like this, internal diameter is set and takes over 2 identical guide shells 4, realize no throttling, the loss of no head, effect is very good.
Claims (5)
1, a kind of hydropower station pressure steel pipe universal type corrugated expansion joint, it is characterized in that it is made up of the U type flexible metal bellows of at least one joint and the adapter at two ends, the two ends of flexible metal bellows link to each other with the outer wall of two pipe nipples respectively, and reach two outer end wall in each trough of flexible metal bellows and be equipped with stiffening ring, the one internal diameter wear-resisting guide shell identical with two pipe nipple internal diameters arranged in the bellows of flexible metal, and an end of the MEDIA FLOW Inbound of this guide shell is connected as a single entity with corresponding pipe nipple the inner.
2, hydropower station pressure steel pipe universal type corrugated expansion joint according to claim 1, it is characterized in that should whole closely being fixed with separately transitional pipe segment at the outer wall of two pipe nipples, the two ends of flexible metal bellows just with the inner fixed seal connection of two transitional pipe segment.
3, hydropower station pressure steel pipe universal type corrugated expansion joint according to claim 1 is characterized in that the stiffening ring in each trough of flexible metal bellows is the semicircular ring composition at two ends, and it is one that the attachment strap solid welding is adopted in their joint; The stiffening ring of metal bellows two outer end wall is whole annulus, and their difference solid weldings are on the outer wall of two corresponding transitional pipe segment.
4, hydropower station pressure steel pipe universal type corrugated expansion joint according to claim 1, it is characterized in that expansion joint should adopt by two single metal bellow type expansion joints composes in series, and only needs the corresponding end of two single metal bellow type expansion joints taken over fuse to get final product.
5, hydropower station pressure steel pipe universal type corrugated expansion joint according to claim 1 is characterized in that and can be equipped with otic placode on the transitional pipe segment of two ends, is connected with lower link bar between them, to be used for the fixing of transportation process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98227608 CN2344636Y (en) | 1998-08-18 | 1998-08-18 | Universal corrugated expansion joint for pressure steel pipe of hydraulic power station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98227608 CN2344636Y (en) | 1998-08-18 | 1998-08-18 | Universal corrugated expansion joint for pressure steel pipe of hydraulic power station |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2344636Y true CN2344636Y (en) | 1999-10-20 |
Family
ID=33977893
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 98227608 Expired - Fee Related CN2344636Y (en) | 1998-08-18 | 1998-08-18 | Universal corrugated expansion joint for pressure steel pipe of hydraulic power station |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2344636Y (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1295565C (en) * | 2001-11-30 | 2007-01-17 | Asml荷兰有限公司 | Lighographic apparatus and device mfg method |
| CN103453271A (en) * | 2013-09-11 | 2013-12-18 | 南京晨光东螺波纹管有限公司 | Low-pressure water-feeding expansion joint for nuclear station |
| CN103486393A (en) * | 2013-09-16 | 2014-01-01 | 江苏桂铭机械有限公司 | Small transverse corrugated compensator with draw bars |
| CN103925449A (en) * | 2014-05-07 | 2014-07-16 | 洛阳双瑞特种装备有限公司 | Restricted-type expansion joint for flue gas turbine inlet high-temperature flue |
| CN107588274A (en) * | 2016-07-10 | 2018-01-16 | 江苏南波机械制造有限公司 | Universal direct-burried hinge type bellow-type expansion joint |
| CN113389942A (en) * | 2021-06-28 | 2021-09-14 | 武汉大学 | Underground buried pressure steel pipe fracture-resistant structure of over-active fault |
-
1998
- 1998-08-18 CN CN 98227608 patent/CN2344636Y/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1295565C (en) * | 2001-11-30 | 2007-01-17 | Asml荷兰有限公司 | Lighographic apparatus and device mfg method |
| CN103453271A (en) * | 2013-09-11 | 2013-12-18 | 南京晨光东螺波纹管有限公司 | Low-pressure water-feeding expansion joint for nuclear station |
| CN103453271B (en) * | 2013-09-11 | 2016-10-05 | 南京晨光东螺波纹管有限公司 | Nuclear power station low pressure feed water expansion joint |
| CN103486393A (en) * | 2013-09-16 | 2014-01-01 | 江苏桂铭机械有限公司 | Small transverse corrugated compensator with draw bars |
| CN103925449A (en) * | 2014-05-07 | 2014-07-16 | 洛阳双瑞特种装备有限公司 | Restricted-type expansion joint for flue gas turbine inlet high-temperature flue |
| CN107588274A (en) * | 2016-07-10 | 2018-01-16 | 江苏南波机械制造有限公司 | Universal direct-burried hinge type bellow-type expansion joint |
| CN113389942A (en) * | 2021-06-28 | 2021-09-14 | 武汉大学 | Underground buried pressure steel pipe fracture-resistant structure of over-active fault |
| CN113389942B (en) * | 2021-06-28 | 2022-07-19 | 武汉大学 | Underground buried pressure steel pipe fracture-resistant structure of over-active fault |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |