CN217349194U - External pipeline connection structure of fused salt storage tank suitable for high temperature - Google Patents
External pipeline connection structure of fused salt storage tank suitable for high temperature Download PDFInfo
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- CN217349194U CN217349194U CN202221418752.6U CN202221418752U CN217349194U CN 217349194 U CN217349194 U CN 217349194U CN 202221418752 U CN202221418752 U CN 202221418752U CN 217349194 U CN217349194 U CN 217349194U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/40—Solar thermal energy, e.g. solar towers
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Abstract
The invention discloses an external pipeline connecting structure of a molten salt storage tank suitable for high temperature, which comprises a tank top plate, an inward extending connecting pipe and a labyrinth connecting piece, wherein the tank top plate is positioned at the top of the molten salt storage tank, the inward extending connecting pipe penetrates through the tank top plate, and the labyrinth connecting piece is sleeved on the periphery of the inward extending connecting pipe; labyrinth connection spare includes inner skleeve and cover and establishes the outside outer sleeve of inner skleeve, the inner skleeve with leave the space between the outer sleeve, the inner skleeve with tank deck fixed connection, the outer sleeve with stretch in and take over fixed connection, stretch in and take over can axial or radial displacement in the inner skleeve. According to the invention, through a labyrinth seal mode, the expansion difference between the top connecting pipeline of the high-temperature molten salt storage tank and the tank body is solved, the problems of high cost, deformation and the like at present are avoided, the connecting structure mode is simplified, and the operation reliability is improved.
Description
Technical Field
The invention belongs to the technical field of solar photo-thermal power generation, and particularly relates to an external pipeline connecting structure of a molten salt storage tank, which is suitable for high temperature.
Background
The molten salt has the characteristics of high use temperature, wide temperature range, good flow characteristic, large heat capacity and the like, can be used for large-scale heat storage of a solar photo-thermal power station, and can get rid of the influence caused by unstable solar energy; the method can be used for medium and small-scale heat storage in the flexible peak regulation transformation process of a thermal power plant, and solves the problem of low grade of heat storage energy; is the most widely used solar heat storage medium at present.
The heat storage system is also an indispensable component in a photo-thermal power station and is also used as a main mode in a thermal power peak regulation transformation project, and the cold and hot molten salt storage tank is one of main devices of the heat storage system. The storage tank of present conventional configuration advances the salt pipe and stretches into from the tank deck of storage tank, at the top of storage tank, advances to be connected through inflation connection structure between the tank deck of salt pipe and storage tank, avoids the expansion stress that pipeline and jar body difference in temperature lead to, reduces the destruction risk of junction tank deck.
The vertical pipe section of the salt inlet pipe is movably connected with the inner wall of the storage tank through a salt inlet pipe support in the middle of the storage tank, and the vertical pipe section can freely move in the axial direction of the storage tank when the salt inlet pipe is used for feeding salt; in the bottom of storage tank, through support elastic connection between the horizontal pipe section of advancing the salt pipe and the bottom plate of storage tank, the one end setting of support is on the bottom plate of storage tank, the horizontal pipe section is supported to the other end, when advancing the salt pipe and advancing salt, the horizontal pipe section has certain movable gap in the vertical direction, solved because of fused salt pipeline temperature and storage tank temperature variation when asynchronous lead to storage tank thermal expansion volume and advance the problem that salt pipeline thermal expansion volume is different to increase the tank bottoms because of the extra stress that the feeding distributes and cause, guarantee the life of storage tank.
In a solar thermal power generation system and a thermal power peak regulation transformation project, the heat release and heat charge frequencies of the storage tank are high, the expansion joint at the top of the tank deforms under the action of long-term alternating stress along with the heat storage and heat release processes, and in the operation process, frequent inspection is needed, so that the risk of personnel burn is caused.
Disclosure of Invention
The invention aims to provide an external pipeline connecting structure suitable for a high-temperature molten salt storage tank, and solves the problem of extra stress caused by expansion difference between a connecting pipeline at the top of the high-temperature molten salt storage tank and a tank body.
The technical scheme is that the external pipeline connecting structure of the molten salt storage tank suitable for high temperature comprises a tank top plate, an inward extending connecting pipe and a labyrinth connecting piece, wherein the tank top plate is positioned at the top of the molten salt storage tank, the inward extending connecting pipe penetrates through the tank top plate, and the labyrinth connecting piece is sleeved on the periphery of the inward extending connecting pipe;
labyrinth connection spare includes inner skleeve and cover and establishes the outside outer sleeve of inner skleeve, the inner skleeve with leave the space between the outer sleeve, the inner skleeve with tank deck fixed connection, the outer sleeve with stretch in and take over fixed connection, stretch in and take over can axial or radial displacement in the inner skleeve.
Preferably, the outer sleeve and the inner extension pipe are fixedly connected through an annular connecting plate.
Preferably, the outer sleeve is located outside the canister roof.
Preferably, a limiting structure is arranged at the top of the inner sleeve.
Preferably, the limiting structure is a blocking ring which is obliquely arranged.
Preferably, the outer wall of the inner sleeve and the inner wall of the outer sleeve are both provided with sealing rings, and the positions of the sealing rings are not on the same horizontal line.
Preferably, the sealing ring is filled with a soft sealing material.
Preferably, the clearance between the sealing ring and the outer sleeve/inner sleeve is larger than the radial expansion amount of the storage tank body and the displacement difference of the inward extending connecting pipe in the direction by 5-10 mm.
Preferably, the bottom of the outer sleeve is arranged obliquely, and the inclination direction of the outer sleeve is the same as that of the tank top plate.
The invention has the beneficial effects that:
1. the invention can be directly processed during equipment manufacturing, saves purchasing difficulty and purchasing cost, and has obvious cost saving effect for a single interface;
2. on the premise of meeting the requirement of expansion displacement difference, the structure is light in weight and small in occupied space, and does not influence an external heat-insulation structure;
3. the structure of the invention is in a labyrinth form, the structure is simple, the deformation is not easy, and simultaneously, the invention can plug the micro positive pressure airflow and meet the sealing requirement of the normal pressure storage tank.
Drawings
FIG. 1 is a schematic view of the mounting structure of the present invention;
FIG. 2 is a schematic view of the labyrinth connection structure of the present invention.
In the figure: 1. a can top panel; 2. extending the connecting pipe inwards; 3. a tank top reinforcing rib; 4. preserving the heat of the top of the tank; 5. a labyrinth connection; 501. an annular connecting plate; 502. a blocking ring; 503. a first seal ring; 504. a second seal ring; 505. an outer sleeve; 506. an inner sleeve; 6. a soft sealing material.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer and more obvious, the technical solutions of the present invention will be described in detail and completely with reference to the accompanying drawings.
Referring to fig. 1 and 2, the invention comprises a tank top plate 1, an inward extending connecting pipe 2, a tank top reinforcing rib 3, a tank top heat preservation 4, a labyrinth connecting piece 5 and a soft sealing material 6.
The top of fused salt storage tank is tank deck 1, and tank deck heat preservation 4 covers in the 1 outside of tank deck, and 1 inboard of tank deck has tank deck strengthening rib 3, and fused salt storage tank top is worn to be equipped with and is stretched in takeover 2, and labyrinth connection spare 5 is installed to the periphery of stretching in takeover 2.
The labyrinth connection piece 5 comprises an annular connection plate 501, a stop ring 502, a first sealing ring 503, a second sealing ring 504, an outer sleeve 505 and an inner sleeve 506. The inner sleeve 506 is welded with the tank top plate 1, the inward extending connecting pipe 2 penetrates through the inner sleeve 506, the inner sleeve 506 is not in direct contact with the inward extending connecting pipe 2, the outer sleeve 505 is sleeved outside the inner sleeve 506, and a certain gap is formed between the inner sleeve 506 and the outer sleeve 505. The outer sleeve 505 is located on the outer side of the tank top plate 1, the lower surface of the outer sleeve is obliquely arranged, the oblique direction of the outer sleeve is the same as that of the tank top plate, the structure can be better sealed, the annular connecting plate 501 is arranged on the top of the outer sleeve 505, the central portion of the annular connecting plate 501 is fixedly connected with the inward extending connecting pipe 2, the edge portion of the annular connecting plate is fixedly connected with the outer sleeve 505, the outer sleeve 505 and the annular connecting plate 501 form a protective cover, and the upper half portion of the inner sleeve 506 is covered in the protective cover. The annular web 501 acts as a connection between the outer sleeve 505 and the inwardly extending pipe 2 and serves to support the outer sleeve 505 and at the same time to close off the headspace of the labyrinth connection 5.
The upper end of the inner sleeve 506 is provided with a limiting device, the limiting device is a stop ring 502, and the inner sleeve 506 is butted with the stop ring 502 and connected with an opening at the top of the molten salt storage tank. The stop ring 502 has a certain inclination angle, and the included angle with the horizontal direction is preferably 30-45 degrees. The blocker ring 502 serves to mitigate the problem of the molten salt mist freezing thereat
The outer wall of the inner sleeve 506 is provided with a ring of second sealing rings 504, the protruding height of the second sealing rings 504 and the outer sleeve 505 leave a gap according to the radial expansion amount of the storage tank body and the displacement difference of the pipeline in the direction, and the space size of the gap is preferably 5-10 mm larger than the radial expansion amount of the storage tank body and the displacement difference of the pipeline in the direction.
The inner wall of the outer sleeve 505 is provided with a circle of first sealing ring 503, the outer wall of the inner sleeve 506 is provided with the first sealing ring 503, the horizontal height of the first sealing ring 503 is not more than the horizontal height of the blocking ring 502, the position of the first sealing ring 503 does not exceed the coating range of the outer sleeve 505, the positions of the first sealing ring 503 and the second sealing ring 504 are not on the same horizontal line, namely, the first sealing ring 503 and the second sealing ring are arranged in a staggered mode to form a labyrinth structure, and external impurities can be prevented from entering the tank while air flow is reduced. And the protruding height of the first sealing ring and the inner sleeve 506 leave a gap according to the radial expansion amount of the storage tank body and the displacement difference of the pipeline in the direction, and the space size of the gap is 5-10 mm larger than the radial expansion amount of the storage tank body and the displacement difference of the pipeline in the direction.
The soft sealing material 6 is filled between the first sealing ring 503 and the second sealing ring 504, and the first sealing ring 503 and the second sealing ring 504 are restricted and fixed, so that the sealing effect can be achieved, and the structural sealing performance is further improved.
The invention solves the problem of expansion stress between large-scale high-temperature storage tank equipment and a connecting pipeline, improves the operation reliability and reduces the primary cost.
Claims (9)
1. The external pipeline connecting structure of the molten salt storage tank suitable for high temperature is characterized by comprising a tank top plate, an inward extending connecting pipe and a labyrinth connecting piece, wherein the tank top plate is positioned at the top of the molten salt storage tank, the inward extending connecting pipe penetrates through the tank top plate, and the labyrinth connecting piece is sleeved on the periphery of the inward extending connecting pipe;
labyrinth connection spare includes inner skleeve and cover and establishes the outside outer sleeve of inner skleeve, the inner skleeve with leave the space between the outer sleeve, the inner skleeve with tank deck fixed connection, the outer sleeve with stretch in and take over fixed connection, stretch in and take over can axial or radial displacement in the inner skleeve.
2. The external pipeline connecting structure of the molten salt storage tank suitable for the high temperature of claim 1, wherein the outer sleeve and the inner extension pipe are fixedly connected through an annular connecting plate.
3. The molten salt storage tank external pipe connection structure suitable for high temperatures of claim 1, wherein the outer sleeve is located outside the tank deck.
4. The external pipeline connecting structure of the molten salt storage tank suitable for the high temperature as claimed in claim 1, wherein a limiting structure is arranged at the top of the inner sleeve.
5. The external pipeline connecting structure of the molten salt storage tank suitable for the high temperature of claim 4, wherein the limiting structure is a blocking ring which is obliquely arranged.
6. The external pipeline connecting structure of the molten salt storage tank suitable for the high temperature as claimed in claim 1, wherein the outer wall of the inner sleeve and the inner wall of the outer sleeve are both provided with sealing rings, and the positions of the sealing rings are not on the same horizontal line.
7. The external pipeline connecting structure of the molten salt storage tank suitable for the high temperature of claim 6, wherein a soft sealing material is filled at the sealing ring.
8. The external pipeline connecting structure of the molten salt storage tank suitable for the high temperature as claimed in claim 6, wherein the clearance between the sealing ring and the outer sleeve/inner sleeve is larger than the radial expansion amount of the storage tank body and the displacement difference of the inward extending connecting pipe in the direction by 5-10 mm.
9. The molten salt storage tank external pipeline connection structure suitable for high temperature of claim 1, characterized in that the outer sleeve bottom is arranged obliquely, and the inclination direction is the same as that of the tank top plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221418752.6U CN217349194U (en) | 2022-06-08 | 2022-06-08 | External pipeline connection structure of fused salt storage tank suitable for high temperature |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221418752.6U CN217349194U (en) | 2022-06-08 | 2022-06-08 | External pipeline connection structure of fused salt storage tank suitable for high temperature |
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| CN217349194U true CN217349194U (en) | 2022-09-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202221418752.6U Active CN217349194U (en) | 2022-06-08 | 2022-06-08 | External pipeline connection structure of fused salt storage tank suitable for high temperature |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117208428A (en) * | 2023-11-09 | 2023-12-12 | 蓝星(北京)化工机械有限公司 | Split type double-layer high-temperature molten salt storage tank |
-
2022
- 2022-06-08 CN CN202221418752.6U patent/CN217349194U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117208428A (en) * | 2023-11-09 | 2023-12-12 | 蓝星(北京)化工机械有限公司 | Split type double-layer high-temperature molten salt storage tank |
| CN117208428B (en) * | 2023-11-09 | 2024-03-01 | 蓝星(北京)化工机械有限公司 | Split type double-layer high-temperature molten salt storage tank |
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