CN202708449U - Dual-seal universal expansion joint for hydropower station - Google Patents
Dual-seal universal expansion joint for hydropower station Download PDFInfo
- Publication number
- CN202708449U CN202708449U CN 201220331861 CN201220331861U CN202708449U CN 202708449 U CN202708449 U CN 202708449U CN 201220331861 CN201220331861 CN 201220331861 CN 201220331861 U CN201220331861 U CN 201220331861U CN 202708449 U CN202708449 U CN 202708449U
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- China
- Prior art keywords
- expansion joint
- corrugated
- bellows
- dual
- connecting pipe
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Abstract
The utility model discloses a dual-seal universal expansion joint for a hydropower station. The expansion joint is characterized by comprising two corrugated pipes, wherein the first corrugated pipe (1) is connected between a left connecting pipe (3) and a middle connecting pipe (4), and the second corrugated pipe (2) is connected between the middle connecting pipe (4) and a right connecting pipe (5) to form an inner-layer sealing structure; and outer sleeves are arranged outside the corrugated pipes, and form an outer-layer sealing structure through sleeve sealing parts. A dual-seal dual-safety measure is adopted for the whole design of the product, and the outer-layer sleeve sealing structure also works even though the innermost-layer corrugated pipes fail and are damaged, so that damage to the whole expansion joint is prevented, and the safety of the product is ensured; by a corrugated pipe displacement distribution device, the displacement of the corrugated pipe of each section can be balanced, and the stability of the middle connecting pipe can be improved; and by sand-proof bodies in the corrugated pipes, sand can be effectively prevented from being deposited in the corrugated pipes, and damage caused by the deposited sand can be avoided.
Description
Technical field
The utility model relates to a kind of pressure steel pipe of hydropower station compensation device.
Background technique
In recent years, increasing pressure steel pipe of hydropower station expansion joint uses in the first-class occasion higher to safety requirement of stratum breaking band, pipe-line system adopts flexible structure, and generally someone lives in the expansion joint mounting zone, for security consideration, project all requires product specification to become two safeguard constructions, in a single day damage because occur expansion joint in using, will cause a large amount of current, impact hydropower station factory building and piping, jeopardize residential belt along the line, cause catastrophic consequence.Prior art not yet has the expansion joint that satisfies above requirement.
Summary of the invention
The purpose of this utility model is exactly for the specific (special) requirements that is positioned at the first-class pressure steel pipe of hydropower station that the safety requirement high field is closed of stratum breaking band, a kind of pair of safeguard construction is provided, can carry out simultaneously that displacement distributes and spacing water power plant double-sealing universal type expansion joint with the working state of improving bellows, to guarantee under the extreme case of bellows failure damage, still can guarantee the unlikely destruction of whole expansion joint, for overhauling, change the water power plant double-sealing universal type expansion joint that gains time.
The technical solution adopted in the utility model is as follows:
A kind of water power plant double-sealing universal type expansion joint is characterized in that it comprises two bellowss, and wherein the first bellows is connected between left end adapter and the middle adapter, and the second bellows is connected between middle adapter and the right-hand member adapter, and their form internal layer sealing configuration; The outside of described two bellowss is equipped with outer sleeve, and outer sleeve forms outer sealing configuration by casing seal.
The inboard of described two bellowss is equipped with the sand prevention body.
Described left end adapter, middle adapter and right-hand member are taken on the outer wall and are welded with the displacement dispensing device.
The beneficial effects of the utility model have:
After being positioned at pressure steel pipe of hydropower station on the stratum breaking band and adopting water power plant of the present utility model double-sealing universal type expansion joint, the Security of expansion joint is further improved, and displacement is more even, and prevent the bellows interior sand, the contentedly requirement of the long-term safety of the pressure steel pipe of hydropower station on fault rupture band operation.But and this product absorption axes to, laterally, the displacement such as angle, therefore be called " universal type ".
Concrete advantage is as follows:
(1) the two safety measures of double-sealing are adopted in the product global design, even the bellows failure damage of innermost layer, outer field bobbin seal structure works, and prevent that whole expansion joint from destroying, and guaranteed the safety of product.
(2) bellows displacement dispensing device is comprised of the hinge plate with nose balance function and the joint shaft bearing that can any direction rotates, and displacement that can balanced each section bellows can improve again the stability of middle adapter.
(3) the sand prevention body of bellows interior can prevent effectively that sand from depositing in bellows interior, and the bellows of avoiding sand to cause damages.
Description of drawings
Fig. 1 is structural representation of the present utility model.
Fig. 2 is the partial structurtes enlarged view of Fig. 1.
Embodiment
The utility model is further described below in conjunction with accompanying drawing:
As shown in Figure 1, 2, it comprises two bellowss the utility model, and wherein the first bellows 1 is connected between left end adapter 3 and the middle adapter 4, and the second bellows 2 is connected to middle adapter 4 and right-hand member is taken between 5, they adopt welding manner, form the internal layer sealing configuration.The outside of the first bellows 1 and the second bellows 2 is equipped with outer sleeve 6,7, and outer sleeve 6,7 forms outer sealing configuration by casing seal 8,9.Like this, even the bellows failure damage of innermost layer, outer field bobbin seal structure works, and prevents that whole expansion joint from destroying.The chloroprene rubber material manufacturing is adopted in casing seal 8,9 sealing, and neoprene is stable performance at normal temperatures, does not absorb water, and Volume Changes is little, the hydro-expansive rubber volumetric expansion can not occur and cause the bellows node partly to bear the problem of external pressure.
The first bellows 1 and the second bellows 2 the inboard be respectively equipped with sand prevention body 11,12.The sand prevention body can prevent effectively that sand from depositing in bellows interior, and the bellows of avoiding sand to cause damages.This sand prevention body adopts micro-pore elastomer, and is permeable but thoroughly not husky.
Described left end adapter 3, middle adapter 4 and right-hand member are taken over and are welded with displacement dispensing device 10 on 5 outer walls.This device is comprised of the hinge plate with nose balance function and the joint shaft bearing that can any direction rotates.This device Main Function: 1. cooperate the bellows compensating axial, laterally reach angular displacement; 2. equal displacement component, average two bellowss of distributing to of displacement that are applied on the complex corrugated pipe expansion joint are compensated, excessive to prevent single bellows compensate for displacement, and another bellows compensate for displacement is very little, causes the excessive bellows of compensate for displacement to reach in advance the damage of cycle fatigue life; 3. improve the stability of middle adapter; middle adapter and Accessory Members thereof are added that the weight of the water of middle adapter inside supports and is delivered on the pipeline at two ends; to increase the stability of middle adapter; play the effect of protection bellows; particularly under seismic load, stability that can the Effective Raise middle adapter.
Other undeclared part that the utility model relates to is same as the prior art.
Claims (3)
1. water power plant double-sealing universal type expansion joint, it is characterized in that it comprises two bellowss, wherein the first bellows (1) is connected between left end adapter (3) and the middle adapter (4), the second bellows (2) is connected to middle adapter (4) and right-hand member is taken between (5), and they form the internal layer sealing configuration; The outside of described two bellowss is equipped with outer sleeve, and outer sleeve forms outer sealing configuration by casing seal.
2. water power plant according to claim 1 double-sealing universal type expansion joint is characterized in that the inboard of described two bellowss is equipped with the sand prevention body.
3. water power plant according to claim 1 double-sealing universal type expansion joint is characterized in that described left end is taken on (3), middle adapter (4) and right-hand member adapter (5) outer wall to be welded with displacement dispensing device (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220331861 CN202708449U (en) | 2012-07-10 | 2012-07-10 | Dual-seal universal expansion joint for hydropower station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220331861 CN202708449U (en) | 2012-07-10 | 2012-07-10 | Dual-seal universal expansion joint for hydropower station |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202708449U true CN202708449U (en) | 2013-01-30 |
Family
ID=47588754
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220331861 Expired - Lifetime CN202708449U (en) | 2012-07-10 | 2012-07-10 | Dual-seal universal expansion joint for hydropower station |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202708449U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
-
2012
- 2012-07-10 CN CN 201220331861 patent/CN202708449U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130130 |