CN202182285U - Ultra-large diameter diversion pressure steel pipe expansion device of hydropower station - Google Patents
Ultra-large diameter diversion pressure steel pipe expansion device of hydropower station Download PDFInfo
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- CN202182285U CN202182285U CN201120283383XU CN201120283383U CN202182285U CN 202182285 U CN202182285 U CN 202182285U CN 201120283383X U CN201120283383X U CN 201120283383XU CN 201120283383 U CN201120283383 U CN 201120283383U CN 202182285 U CN202182285 U CN 202182285U
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- pressure steel
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Abstract
The utility model relates to an ultra-large diameter diversion pressure steel pipe expansion device of a hydropower station; the device comprises an intermediate pipe, and expansion joints at the front and rear ends of the intermediate pipe, wherein the expansion joints at the front and rear ends have the same structure, and are corrugated expansion joints of a corrugated pipe water seal and rubber packing water seal dual structure; and the corrugated expansion joints of the corrugated pipe water seal and rubber packing water seal dual structure are sleeve type bidirectional expansion joints of a double water seal composed of a stainless steel corrugated pipe water seal system and a rubber packing water seal system. The device provided by the utility model can meet demands of the diversion pressure steel pipes among dams of a large capacity hydroelectric generation device on strength, rigidness, stability, deformation fatigue life and sealing property.
Description
Technical field
The utility model relates to a kind of pipeline expansion device, particularly a kind of water power plant super large caliber diversion pressure steel tube expansion device.
Background technique
As everyone knows, in the long pipeline engineering, consider the influence of environment to pipeline, the especially temperature effect pipeline displacement with supporting frame of expanding with heat and contract with cold makes pipeline produce distortion.Concerning big capacity hydroelectric installation; For adapting to inhomogeneous deformation between factory, dam; On each diversion pressure steel tube, need be provided with expansion device; This expansion device must satisfy the strict demand of intensity, rigidity, stability, distortion fatigue life and sealability, and this is to show a difficult problem that exists in the engineering.
The model utility content
The purpose of the utility model is to overcome the deficiency of above-mentioned existing technology; Propose a kind of water power plant super large caliber diversion pressure steel tube expansion device, can satisfy the requirement of the intensity of diversion pressure steel tube, rigidity, stability, distortion fatigue life and sealing between the dam in the big capacity hydroelectric installation.
For realizing above-mentioned purpose, the utility model adopts following technical proposals:
A kind of water power plant super large caliber diversion pressure steel tube expansion device; The slip joint that comprises an intervalve and front end and back end thereof; The slip joint structure that it is characterized in that described front end and back end is identical; Be the bellow-type expansion joint that the bellows water seal joins gum filler water seal dual structure, the bellow-type expansion joint that this bellows water seal joins gum filler water seal dual structure is the telescopic bi-directional expansion joint that corrugated stainless steel tubing seal water system and gum filler seal water system constitute double seal.
The structure of last pipe seal water system is: the two ends of described intervalve connect an end of two bellowss respectively, and the other end of two bellowss connects two end pipes, these two Guan Weiyi upstream extremity pipes of end and a downstream pipe respectively.
Above-mentioned bellows is a thin walled structures, and by 2～6 layers, wall thickness is that the U-shaped Stainless Sheet Steel of 1～2mm constitutes, and wave height is 90mm～110mm, and the ripple number is 2～3.
Between two ripples of the above-mentioned bellows outside, a ripple stiffening ring is set, the interior bore edges semicircular in shape of this ripple stiffening ring and join with the trough of bellows contacts.
A stiffening ring is respectively welded in the above-mentioned outside, intervalve two end part.
Respectively there is a protection outer sleeve in two above-mentioned bellows outsides; This protection outer sleeve is that an end of an outer sleeve is integrally welded with upstream extremity pipe and downstream pipe respectively through an outside end ring and floor; Inboard end ring of the other end welding of outer sleeve; The endoporus and the intervalve cunning of inboard end ring are joined, and two protection outer sleeves are included in two bellowss, ripple stiffening ring and stiffening ring in its inner chamber respectively.
Between the two ends inwall of above-mentioned intervalve and the upstream and downstream end inner tube wall guide shell is arranged respectively, the welding of an end of two guide shells and intervalve or upstream extremity pipe, the other end is cantilever and intervalve or downstream inner tube wall cunning are joined respectively.
On the circumferential weld of above-mentioned guide shell and intervalve or the welding of upstream and downstream end pipe, be provided with 80～100 resistances along circumference and split plate, it is 8～12mm that plate thickness is split in this resistance, and ovalize, its major axis are 100～120mm, and minor axis is 60～80mm.
The structure of above-mentioned gum filler seal water system is: one is connected a trim ring assembly with filler thimble assembly that said inboard end ring is fixedly connected into one through bolt and nut, settles a rubber assembly in the annular chamber that between intervalve outer wall, inboard end ring outer wall, filler thimble assembly inwall and trim ring assembly end wall, forms.
The structure of above-mentioned filler thimble assembly is: filler sleeve pipe of inboard end ring (10) welding, and flange circle of welding on this filler sleeve pipe, reinforcement gusset and the medial extremity loops welded of this flange circle through circumferentially being uniformly distributed with circumferentially is uniformly distributed with bolt penetration hole on the flange circle; The structure of described trim ring assembly is: slide on the intervalve outer wall and join a trim ring; Connecting ring of this trim ring middle part welding; The bolt penetration hole that circumferentially is uniformly distributed with on this connecting ring is corresponding with bolt penetration hole item on the flange circle, realizes that through screw bolt and nut connecting ring is connected with the adjustable of flange circle; Said rubber assembly is to be made up of side by side a plurality of rubber rings, is General Purpose Rubber circle hydro-expansive rubber circle and General Purpose Rubber circle and constitutes side by side for three sections; The endoporus side of these rubber rings is stained with polytetrafluoroethylene film.
Be provided with bidirectionally limited device between the slip joint of above-mentioned intervalve front end and back end; The structure of this bidirectionally limited device is: each circumferentially is uniformly distributed with a plurality of push rod connecting bases on the outer sleeve at intervalve two ends; The intervalve middle part circumferentially is uniformly distributed with installs two relative push rod support plates; Be connected a spacing push rod between push rod connecting base and the push rod support plate; Can transpose through spacing adjusting nut between this spacing push rod and the push rod connecting base is connected, and settles a positive stop between two relative push rod support plates.
The utility model compared with prior art; Have following conspicuous substantive distinguishing features and advantage: the slip joint of the utility model adopts corrugated stainless steel tubing seal water system and gum filler seal water system to constitute the telescopic bi-directional expansion joint of double seal, and the structure of these two systems all can satisfy the requirement of intensity, rigidity, stability, distortion fatigue life and sealing.The intensity of its bellows own can be born the interior pressure of aqueduct; The characteristic of bellows can compensate axial and the horizontal displacement of slip joint place pipeline, has solved between the factory dam once qualitative change position and penstock because of the flow direction downstream and the radial displacement compensation problem of welding stress, hydraulic head pressure and four seasons current temperature difference generation are installed.The bellows outside is provided with the protection outer sleeve, guarantees the working life of bellows.Be provided with guide shell in the bellows inboard, reduce flow resistance.The gum filler seal water system constitutes the second road wiper seal, the hydro-expansive rubber circle is arranged, good seal performance in its sealing rubber ring.And the sticking multiple polytetrafluoroethylene film of the endoporus side of rubber ring, to reduce resistance to motion.For preventing to cause that because of damping is different one-sided bellows displacement is excessive.Slip joint along the circumferential direction is provided with bidirectionally limited device between upstream and downstream.
Description of drawings
Fig. 1 is an embodiment's of the utility model a profile schematic representation.
Fig. 2 is the sectional view at A among Fig. 1-A place.
Fig. 3 is the three-dimensional partial structurtes figure at bellows place among Fig. 2.
Fig. 4 is the three-dimensional partial sectional view of Fig. 2.
Embodiment
A preferred embodiment of the utility model combines detailed description of the drawings following:
Embodiment 1:Referring to Fig. 1 and Fig. 2; This water power plant super large caliber diversion pressure steel tube expansion device; The slip joint 5,4 that comprises an intervalve 2 and front end and back end thereof); Slip joint 5,4 structures of described front end and back end are identical, are the bellow-type expansion joint that the bellows water seal joins gum filler water seal dual structure, and the bellow-type expansion joint that this bellows water seal joins gum filler water seal dual structure is the telescopic bi-directional expansion joint that corrugated stainless steel tubing seal water system and gum filler seal water system constitute double seal.
Embodiment 2:Present embodiment and embodiment 1 are basic identical; Specialization is following: the structure of described corrugated stainless steel tubing seal water system is: the two ends of described intervalve 2 connect an end of two bellowss 19 respectively; The other end of two bellowss 19 connects two end pipes, these two Guan Weiyi upstream extremity pipes 1 of end and a downstream pipe 3 respectively.Described bellows 19 is a thin walled structures, and by 2～6 layers, wall thickness is that the U-shaped Stainless Sheet Steel of 1～2mm constitutes, and wave height is 90mm～110mm, and the ripple number is 2～3.Between two ripples of described bellows 19 outsides, a ripple stiffening ring 18 is set, the interior bore edges semicircular in shape of this ripple stiffening ring 18 and inconsistent with the trough of bellows 19.
Embodiment 3: referring to Fig. 2 and Fig. 3, present embodiment and embodiment 2 are basic identical, and specialization is following: a stiffening ring 9 is respectively welded in the outside, described intervalve 2 two end part.Respectively there is a protection outer sleeve in described two bellows 19 outsides; This protection outer sleeve is that an end of an outer sleeve 8 is integrally welded with upstream extremity pipe 1 and downstream pipe 3 respectively through an outside end ring 7 and floor 6; Inboard end ring 10 of the other end welding of outer sleeve 8; The endoporus of inboard end ring 10 and 2 sliding joining of intervalve, two protection outer sleeves are included in two bellowss 19, ripple stiffening ring 18 and stiffening ring 9 in its inner chamber respectively.One end and the intervalve 2 or 1 welding of upstream extremity pipe of a guide shell 20, two guide shells 20 are respectively arranged between the two ends inwall of described intervalve 2 and upstream and downstream end pipe 1,3 inwalls, and the other end is cantilever and joins with intervalve 2 or downstream pipe 3 inwall cunnings respectively.On the circumferential weld of described guide shell 20 and intervalve 2 or 1 welding of upstream extremity pipe, be provided with 80～100 resistances along circumference and split plate 21, it is 8～12mm that plate 21 thickness are split in this resistance, and ovalize, its major axis are 100～120mm, and minor axis is 60～80mm.
Embodiment 4: referring to Fig. 2; Present embodiment and embodiment 3 are basic identical; Specialization is following: the structure of described gum filler seal water system is: one is fixedly connected the filler thimble assembly that is integral with said inboard end ring 10 and is connected a trim ring assembly through bolt and nut, rubber assembly 7 of arrangement in the annular chamber that between intervalve 2 outer walls, inboard end ring 10 outer walls, filler thimble assembly inwall and trim ring assembly end wall, forms.The structure of described filler thimble assembly is: filler sleeve pipe 12 of inboard end ring 10 welding, flange circle 13 of welding on this filler sleeve pipe 12, the stiffening rib of this flange circle 13 through circumferentially being uniformly distributed with
Plate 11 and inboard end ring 10 welding circumferentially are uniformly distributed with bolt penetration hole on the flange circle 13; The structure of described trim ring assembly is: slide on intervalve 2 outer walls and join a trim ring 14; Connecting ring 16 of this trim ring 14 middle parts welding; The bolt penetration hole that circumferentially is uniformly distributed with on this connecting ring 16 is corresponding with bolt penetration hole item on the flange circle 13, realizes that through screw bolt and nut connecting ring 16 is connected with the adjustable of flange circle 13; Said rubber assembly 17 is to be made up of side by side a plurality of rubber rings, is General Purpose Rubber circle hydro-expansive rubber circle and General Purpose Rubber circle and constitutes side by side for three sections; The endoporus side of these rubber rings is stained with polytetrafluoroethylene film.
Embodiment 5: referring to Fig. 4; Present embodiment and embodiment 3 are basic identical; Specialization is following: the slip joint 5 of described intervalve 2 front end and back end, be provided with bidirectionally limited device between 4; The structure of this bidirectionally limited device is: each circumferentially is uniformly distributed with a plurality of push rod connecting bases 22 on the outer sleeve 8 at intervalve 2 two ends, and intervalve 2 middle parts circumferentially are uniformly distributed with installs two relative push rod support plates 23, is connected a spacing push rod 24 between push rod connecting base 22 and the push rod support plate 23; Can transpose through spacing adjusting nut 25 between this spacing push rod 24 and the push rod connecting base 22 is connected, and settles a positive stop 26 between two relative push rod support plates 23.
Embodiment 6: referring to Fig. 1, Fig. 2, Fig. 3 and Fig. 4, written or printed documents water power plant super large caliber diversion pressure steel tube expansion device is applied to water power plant, tame dam single-machine capacity 800MW, is the hydroelectric installation of present domestic maximum capacity.For adapting to inhomogeneous deformation between factory, dam,, factory building upper reaches abutment wall place terminal at each diversion steel pipe is provided with Φ 12200 bellow-type expansion joints.Design internal water pressure 1.5MPa, external water pressure 0.75 MPa between gum filler water seal and the bellows, stream is taken out maximum relative displacement y=20 downstream, maximum relative displacement y=13 radially, the maximum displacement cycle-index is greater than 1000 times.
The slip joint structural feature
For guaranteeing the safe and reliable of water power plant; Bellow-type expansion joint in the utility model device adopts " bellows water seal+gum filler water seal " dual structure scheme, and promptly structural type is the telescopic bi-directional expansion joint of corrugated stainless steel tubing water seal+gum filler seal water system double seal.Require the bellows system of slip joint and the design condition that the sleeve packign part all satisfies intensity, rigidity, stability, distortion fatigue life and sealability.
A. bellows seal water system
Bellows is designed to compound free type (4.1.2 bar among the GB/T12777-2008) according to international GB/T12777-2008 and the U.S. " EJMA " standard, and promptly two bellowss and end pipe are formed by intervalve connected.Each bellows is thin-walled (every layer is the 1.5m/m wall thickness), and multilayer (actual is 4 layers) is strengthened U type structure, and corrugated material is the SUS304 stainless steel.Wave height is 100m/m, and the pitch of waves is 100m/m, and the ripple number is 2.The intensity of bellows own can be born the interior pressure of aqueduct; Simultaneously because the characteristic of ripple can compensate the axial and horizontal displacement of bellow-type expansion joint two ends pipeline.Solve between factory and the dam once qualitative change position and penstock like this because of welding stress being installed, the flow direction downstream and the radial displacement compensation problem of hydraulic head pressure and four seasons current temperature difference generation.
B. in the bellows outside, upstream and downstream respectively are provided with the protection outer sleeve of a reinforcement, and this outer sleeve also is the pressure boundary and the supporting base of the second road water seal (being the gum filler water seal) simultaneously.
In order to protect bellows, and reduce the influence of corrugated pipe segment internal surface to flow, the steel pipe inboard of corrugated pipe segment respectively is provided with a guide shell that flushes with the penstock internal surface in upstream and downstream, the minimizing flow resistance.
The gum filler water seal is when in a single day the bellows water seal takes place to leak, and is just acting as wiper seal border, second road.The sealing bedding and padding adopt combination rubber (being General Purpose Rubber+hydro-expansive rubber+three sections combinations such as General Purpose Rubber), and the endoporus side of these rubber is pasted multiple polytetrafluoroethylene film to reduce resistance to motion.
C. cause that because of damping is different one-sided bellows displacement is excessive for preventing, the peripheral direction upstream and downstream respectively are provided with bidirectionally limited device to slip joint along the garden.Simultaneously, for ease of detecting the bellows leakage situation, outer sleeve bottom is established telltale hole.
At present, this Bellows expansion joint respectively in June, 2010 and October through criterion design review and type approval test (contain pressure test and press fatigue test) with band, will get into erection stage recently.
Claims (11)
1. water power plant super large caliber diversion pressure steel tube expansion device; The slip joint (5,4) that comprises an intervalve (2) and front end and back end thereof; Slip joint (5, the 4) structure that it is characterized in that described front end and back end is identical; Be the bellow-type expansion joint that the bellows water seal joins gum filler water seal dual structure, the bellow-type expansion joint that this bellows water seal joins gum filler water seal dual structure is the telescopic bi-directional expansion joint that corrugated stainless steel tubing seal water system and gum filler seal water system constitute double seal.
2. water power plant according to claim 1 super large caliber diversion pressure steel tube expansion device; The structure that it is characterized in that described corrugated stainless steel tubing seal water system is: the two ends of described intervalve (2) connect an end of two bellowss (19) respectively; The other end of two bellowss (19) connects two end pipes respectively, holds a Guan Weiyi upstream extremity pipe (1) and a downstream pipe (3) for these two.
3. water power plant according to claim 2 super large caliber diversion pressure steel tube expansion device; It is characterized in that described bellows (19) is a thin walled structures, by 2～6 layers, wall thickness is that the U-shaped Stainless Sheet Steel of 1～2mm constitutes; Wave height is 90mm～110mm, and the ripple number is 2～3.
4. water power plant according to claim 3 super large caliber diversion pressure steel tube expansion device; It is characterized in that between two ripples of described bellows (19) outside; A ripple stiffening ring (18) is set, the interior bore edges semicircular in shape of this ripple stiffening ring (18) and contacting with the trough of bellows (19).
5. water power plant according to claim 4 super large caliber diversion pressure steel tube expansion device is characterized in that respectively welding a stiffening ring (9) outside described intervalve (2) two end part.
6. water power plant according to claim 5 super large caliber diversion pressure steel tube expansion device; It is characterized in that respectively there is a protection outer sleeve in described two bellowss (19) outside; This protection outer sleeve is that an end of an outer sleeve (8) is integrally welded with upstream extremity pipe (1) and downstream pipe (3) respectively through an outside end ring (7) and gusset (6); A the other end welding inboard end ring (10) of outer sleeve (8); The endoporus of inboard end ring (10) and intervalve (2) are sliding joins, and two protection outer sleeves are included in two bellowss (19), ripple stiffening ring (18) and stiffening ring (9) in its inner chamber respectively.
7. water power plant according to claim 2 super large caliber diversion pressure steel tube expansion device; It is characterized in that between two ends inwall and upstream and downstream end pipe (1, the 3) inwall of described intervalve (2) guide shell (20) being arranged respectively; The welding of one end of two guide shells (20) and intervalve (2) or upstream extremity pipe (1,3), the other end are cantilever and intervalve (2) or downstream pipe (1,3) inwall cunning are joined respectively.
8. water power plant according to claim 7 super large caliber diversion pressure steel tube expansion device; It is characterized in that on the circumferential weld of described guide shell (20) and intervalve (2) or upstream and downstream end pipe (1,3) welding; Be provided with 80～100 resistances along circumference and split plate (21), it is 8～12mm that plate (21) thickness is split in this resistance, ovalize; Its major axis is 100～120mm, and minor axis is 60～80mm.
9. water power plant according to claim 1 super large caliber diversion pressure steel tube expansion device; The structure that it is characterized in that described gum filler seal water system is: one is fixedly connected the filler thimble assembly that is integral with said inboard end ring (10) and is connected a trim ring assembly through bolt and nut, an arrangement rubber assembly (7) in the annular chamber that between intervalve (2) outer wall, inboard end ring (10) outer wall, filler thimble assembly inwall and trim ring assembly end wall, forms.
10. water power plant according to claim 9 super large caliber diversion pressure steel tube expansion device; The structure that it is characterized in that described filler thimble assembly is: inboard end ring (a 10) welding filler sleeve pipe (12); This filler sleeve pipe (12) is gone up a welding flange circle (13); The reinforcement gusset (11) and inboard end ring (10) welding of this flange circle (13) through circumferentially being uniformly distributed with, the flange circle circumferentially is uniformly distributed with bolt penetration hole on (13); The structure of described trim ring assembly is: the sliding trim ring (14) of joining on intervalve (2) outer wall; This trim ring (14) middle part welding connecting ring (16); The bolt penetration hole that circumferentially is uniformly distributed with on this connecting ring (16) is corresponding with bolt penetration hole item on the flange circle (13), realizes adjustable connection of connecting ring (16) and flange circle (13) through screw bolt and nut; Said rubber assembly (17) is to be made up of side by side a plurality of rubber rings, is General Purpose Rubber circle hydro-expansive rubber circle and General Purpose Rubber circle and constitutes side by side for three sections; The endoporus side of these rubber rings is stained with polytetrafluoroethylene film.
11. water power plant according to claim 1 super large caliber diversion pressure steel tube expansion device; It is characterized in that being provided with bidirectionally limited device between the slip joint (5,4) of described intervalve (2) front end and back end; The structure of this bidirectionally limited device is: go up each at the outer sleeve (8) at intervalve (2) two ends and circumferentially be uniformly distributed with a plurality of push rod connecting bases (22); ((2) middle part circumferentially is uniformly distributed with two relative push rod support plates (23) is installed intervalve; Be connected a spacing push rod (24) between push rod connecting base (22) and the push rod support plate (23); Can transpose through spacing adjusting nut (25) between this spacing push rod (24) and the push rod connecting base (22) is connected, and settles a positive stop (26) between two relative push rod support plates (23).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120283383XU CN202182285U (en) | 2011-08-05 | 2011-08-05 | Ultra-large diameter diversion pressure steel pipe expansion device of hydropower station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120283383XU CN202182285U (en) | 2011-08-05 | 2011-08-05 | Ultra-large diameter diversion pressure steel pipe expansion device of hydropower station |
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| Publication Number | Publication Date |
|---|---|
| CN202182285U true CN202182285U (en) | 2012-04-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120283383XU Expired - Lifetime CN202182285U (en) | 2011-08-05 | 2011-08-05 | Ultra-large diameter diversion pressure steel pipe expansion device of hydropower station |
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| CN (1) | CN202182285U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102297309A (en) * | 2011-08-05 | 2011-12-28 | 上海永鑫波纹管有限公司 | Telescopic device of ultra-large caliber water-conducting pressure steel pipe of water power station and method for manufacturing corrugated pipe thereof |
| CN103883828A (en) * | 2014-03-17 | 2014-06-25 | 江苏曙光压力容器有限公司 | Axial corrugated expansion joint with reinforced connection structure |
| CN108443619A (en) * | 2018-04-12 | 2018-08-24 | 中国葛洲坝集团股份有限公司 | Pressure steel pipe of hydropower station Bellows expansion joint installation method |
| CN111503400A (en) * | 2020-05-22 | 2020-08-07 | 江苏迪威高压科技股份有限公司 | Novel large-caliber high-pressure stainless steel quick connector valve body |
-
2011
- 2011-08-05 CN CN201120283383XU patent/CN202182285U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102297309A (en) * | 2011-08-05 | 2011-12-28 | 上海永鑫波纹管有限公司 | Telescopic device of ultra-large caliber water-conducting pressure steel pipe of water power station and method for manufacturing corrugated pipe thereof |
| CN103883828A (en) * | 2014-03-17 | 2014-06-25 | 江苏曙光压力容器有限公司 | Axial corrugated expansion joint with reinforced connection structure |
| CN108443619A (en) * | 2018-04-12 | 2018-08-24 | 中国葛洲坝集团股份有限公司 | Pressure steel pipe of hydropower station Bellows expansion joint installation method |
| CN111503400A (en) * | 2020-05-22 | 2020-08-07 | 江苏迪威高压科技股份有限公司 | Novel large-caliber high-pressure stainless steel quick connector valve body |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
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| CX01 | Expiry of patent term |
Granted publication date: 20120404 |