CN212361580U - Tank top support and tank bottom limiting structure of low-temperature storage tank pump well pipe - Google Patents
Tank top support and tank bottom limiting structure of low-temperature storage tank pump well pipe Download PDFInfo
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- CN212361580U CN212361580U CN202020501756.5U CN202020501756U CN212361580U CN 212361580 U CN212361580 U CN 212361580U CN 202020501756 U CN202020501756 U CN 202020501756U CN 212361580 U CN212361580 U CN 212361580U
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- pump well
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- pump
- storage tank
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Abstract
The utility model discloses a tank deck of low temperature storage tank pump well pipe supports and tank bottoms limit structure. The pump well pipe is fixed on the vault of the storage tank, and the tank top bears the gravity of all the pump wells; a vault around a pump well pipe is provided with a reinforcing rib for local reinforcement; the radial position of the pump well pipe during installation considers the shrinkage of the inner tank in the working state in advance; the horizontal and axial movement of the pump well pipe is not limited by the suspended ceiling; the limiting device is arranged at the bottom of the inner tank to prevent the pump well pipe from generating overlarge horizontal swing; the tank bottom limiting device does not limit the vertical movement of the pump well pipe, and the pump well pipe can freely move along the axial direction. The structure can be used for fixing and supporting the pump well of the large-scale liquefied hydrocarbon and liquefied natural gas double-metal-wall low-temperature storage tank. The structure can effectively reduce the horizontal vibration of the pump well pipe, and the stress of the pump well pipe in the working state is small.
Description
Technical Field
The utility model relates to a liquefied hydrocarbon and liquefied natural gas bimetal wall low temperature storage tank, concretely relates to fixed and bearing structure of pump well of this type of low temperature storage tank.
Background
With the increasing attention on environmental issues in the world, the consumption of clean energy such as Liquefied hydrocarbons (hydrocarbons) and Liquefied Natural Gas (LNG) is increasing, and the demand for large cryogenic storage tanks for Liquefied hydrocarbons and LNG is also increasing. Common such cryogenic storage tanks include both bimetallic storage tanks and concrete storage tanks. The low-temperature storage tank consists of an inner tank, an outer tank and a cold insulation layer between the inner tank and the outer tank, wherein the inner tank is a steel storage tank, and the outer tank is a steel storage tank or a concrete tank.
The pump well of the low-temperature storage tank mainly bears the gravity load in a working state, the horizontal thrust generated by the cold shrinkage of the inner tank on a pump well pipe and the horizontal vibration generated by the pump well pipe when the immersed pump works. The gravitational load and the horizontal thrust of the inner tank cause axial stresses in the pump well, which may lead to its destruction. Horizontal vibration can lead to fatigue failure of the pump well tubing or to failure of the pump well tubing seal. If the pump well is positioned in the storage tank and is cracked or failed, the storage tank needs to be emptied firstly to be overhauled, and the operation of the storage tank is seriously influenced.
Therefore, the supporting structure of the pump well pipe is designed, so that the pump well pipe cannot break due to overlarge axial stress, the horizontal vibration of the pump well pipe in a working state can be effectively reduced, and the low-temperature storage tank can safely and stably run and has important practical significance.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a tank deck of low temperature storage tank pump well pipe supports and tank bottoms limit structure. The structure can ensure that the pump well pipe cannot generate overlarge axial stress in the working state, can effectively reduce the horizontal vibration of the pump well pipe in the working state, and ensures that the low-temperature storage tank can safely and stably run.
In order to achieve the above purpose, the technical scheme of the utility model is that: a tank top supporting and tank bottom limiting structure of a low-temperature storage tank pump well pipe comprises an inner tank, an immersed pump, a pump well pipe, a suspended ceiling sleeve, a suspended ceiling cover plate, a vault sleeve and a vault, and is characterized in that the pump well pipe is fixed to the vault through a supporting ring and the vault sleeve, the weight of the pump well pipe is borne by the vault, and the vault sleeve, the vault and the supporting ring in the area around the pump well pipe are provided with reinforcing ribs for reinforcement; the tank bottom sets up stop device, prevents that the pump well pipe from producing too big horizontal hunting thereupon when the immersed pump work, and the pump well pipe of this position sets up spacing backing plate and strengthens.
A tank top support and tank bottom limiting structure of a low-temperature storage tank pump well pipe is characterized in that the pump well pipe, a vault sleeve, a vault and a support ring are connected in a welding mode.
A tank top supporting and tank bottom limiting structure of a low-temperature storage tank pump well pipe is characterized in that the pump well pipe is detachably connected with a ceiling cover plate and a limiting device.
A structure for supporting the top of pump well tube and limiting the bottom of tank features that the radial distance between the top of pump well tube and the bottom of tank is 30-120 mm, which is determined by the radius of internal tank, operating temperature and linear expansion coefficient of internal tank material.
The utility model provides a tank deck of low temperature storage tank pump well pipe supports and tank bottoms limit structure, characterized by pump well pipe, furred ceiling apron and furred ceiling sleeve are not welded within a definite time, and the furred ceiling apron falls on the furred ceiling sleeve under the action of gravity, therefore the axial displacement of pump well pipe does not receive the furred ceiling restriction.
A tank top supporting and tank bottom limiting structure of a low-temperature storage tank pump well pipe is characterized in that the difference value of the radiuses among the pump well pipe, a suspended ceiling sleeve and a straight cylinder section of a suspended ceiling cover plate is not less than the cold shrinkage of a suspended ceiling and ranges from 30mm to 120mm, and therefore horizontal displacement of the pump well pipe is not limited by the suspended ceiling.
A tank top support and tank bottom limiting structure of a low-temperature storage tank pump well pipe is characterized in that a limiting device does not limit movement of the pump well pipe in the vertical direction, the pump well pipe can freely move in the axial direction, and the pump well pipe cannot generate overlarge axial stress.
A tank top supporting and tank bottom limiting structure of a low-temperature storage tank pump well pipe is characterized in that a limiting device adopts an annular elastic limiting spring, and the limiting force on the pump well pipe can be effectively reduced.
A tank top support and tank bottom limiting structure of a low-temperature storage tank pump well pipe is characterized in that reinforcing ribs are not lower than 4 pieces and are circumferentially and uniformly distributed.
The utility model relates to a tank deck of low temperature storage tank pump well pipe supports and tank bottoms limit structure can be used to the fixed of large-scale liquefied hydrocarbon and liquefied natural gas bimetal wall low temperature storage tank pump well and supports. The structure can effectively reduce the horizontal vibration of the pump well pipe, and the stress of the pump well pipe in the working state is small.
Drawings
In order to more clearly illustrate the embodiments or technical solutions of the present invention, the drawings required for the description of the embodiments or the prior art are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive changes.
FIG. 1 is a schematic diagram of a tank top support and tank bottom limiting structure of a cryogenic storage tank pump well pipe.
Fig. 2 is a top view of the spacing device.
Description of reference numerals: 1-inner tank, 2-immersed pump, 3-limiting device, 3-1-elastic limiting spring, 4-limiting base plate, 5-pump well pipe, 6-ceiling sleeve, 7-ceiling cover plate, 8-vault sleeve, 8-1-vault sleeve reinforcing rib, 9-vault, 9-1-vault reinforcing rib, 10-support ring and 10-1-vault reinforcing rib.
Detailed Description
In order to more clearly illustrate the embodiments or technical solutions of the present invention, the drawings required for the description of the embodiments or the prior art are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive changes.
The present invention will be described in detail with reference to the accompanying drawings.
As shown in figure 1, the tank top support and the tank bottom limit structure of the pump well pipe of the cryogenic storage tank can be used for fixing and supporting the pump well of the bimetallic wall cryogenic storage tank of large liquefied hydrocarbon and liquefied natural gas. It is characterized in that the pump well pipe 5, the dome sleeve 8, the dome 9 and the support ring 10 are connected by welding. The pump well pipe 5 is detachably connected with the ceiling cover plate 7 and the limiting device 3.
The pump well casing 5 is fixed to the dome 9 by means of a support ring 10 and a dome sleeve 8, and the weight of the pump well casing 5 is borne entirely by the dome 9. The material of the pump well casing 5 and the support ring 10 should be stainless steel or other cryogenic steel, and the material of the dome sleeve 8 may be plain carbon steel (e.g. Q345R) in conformity with the dome 9. The support ring 10 and the dome sleeve 8 should have sufficient strength. The thickness of support ring is 10 ~ 30mm usually, and the thickness of vault sleeve 8 is 10mm ~ 20mm usually.
The vault sleeve 8, the vault 9 and the support ring 10 in the area around the pump well pipe 5 need to be respectively provided with a vault sleeve reinforcing rib 8-1, a vault reinforcing rib 9-1 and a vault reinforcing rib 10-1 for reinforcement. The materials of the top sleeve reinforcing rib 8-1, the vault reinforcing rib 9-1 and the vault reinforcing rib 10-1 are the same as the body of the top sleeve reinforcing rib, and the thickness of the top sleeve reinforcing rib is usually 6-16 mm. The top sleeve reinforcing ribs 8-1, the vault reinforcing ribs 9-1 and the vault reinforcing ribs 10-1 are usually not less than 4 pieces and are circumferentially and uniformly distributed. The width of the arch reinforcement 9-1 is usually 60mm to 120 mm.
The inner tank 1 can be cooled and contracted in a working state, the limiting device 3 at the lower part of the pump well pipe 5 can generate radial displacement along with the inner tank, and the displacement is considered when the pump well pipe 5 is installed so as to ensure that the pump well pipe 5 is close to a linear state in the working state and cannot generate obvious bending stress. The radial distance of the well pipes 5 at the dome 9 and the bottom fixing position of the tank should be determined according to the radius of the inner tank, the operating temperature and the linear expansion coefficient of the material of the inner tank, and is usually 30mm to 120 mm.
The pump well pipe 5, the ceiling cover plate 7 and the ceiling sleeve 6 are not welded, the ceiling cover plate 7 falls on the ceiling sleeve 6 under the action of gravity, and therefore the axial displacement of the pump well pipe is not limited by a ceiling. The radii of the straight sections of the pump well pipe 5, the ceiling sleeve 6 and the ceiling cover plate 7 should be sufficiently different to ensure that the horizontal displacement of the pump well pipe 5 is not limited by the ceiling. The ceiling cover 7 and the ceiling sleeve 6 should be made of stainless steel or other low temperature resistant materials. The thickness can be reduced as appropriate because of the small load applied to both, and is usually 4mm to 10 mm.
The difference value of the radiuses of the straight cylinder sections of the pump well pipe 5, the ceiling sleeve 6 and the ceiling cover plate 7 is not less than the cold shrinkage of the ceiling, and is usually 30-120 mm.
As shown in fig. 2, the limiting device 3 is arranged at the bottom of the tank to prevent the pump well pipe 5 from generating excessive horizontal swing along with the submerged pump 3 when the submerged pump operates. The pump well pipe 5 at the position is reinforced by arranging a limiting cushion plate 4. The limiting device 3 adopts an annular elastic limiting mode (such as a spring with lower rigidity) and can effectively reduce the restraining force on the pump well pipe 5.
The limiting device 3 does not limit the vertical movement of the pump well pipe 5, and the pump well pipe 5 cannot generate overlarge axial stress.
The structure is suitable for the double-metal-wall low-temperature storage tank for liquefied hydrocarbon and liquefied natural gas with the length of a pump well pipe not exceeding 60 m. The structure can ensure that the pump well pipe cannot generate overlarge axial stress in the working state, can effectively reduce the horizontal vibration of the pump well pipe in the working state, and ensures that the low-temperature storage tank can safely and stably run.
The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are all covered by the protection scope of the present invention.
Claims (9)
1. A tank top supporting and tank bottom limiting structure of a pump well pipe of a low-temperature storage tank comprises an inner tank (1), an immersed pump (2), a pump well pipe (5), a suspended ceiling sleeve (6), a suspended ceiling cover plate (7), a vault sleeve (8) and a vault (9), and is characterized in that the pump well pipe (5) is fixed to the vault (9) through a support ring (10) and the vault sleeve (8), the weight of the pump well pipe (5) is borne by the vault (9), and the vault sleeve (8), the vault (9) and the support ring (10) in the peripheral area of the pump well pipe (5) are provided with reinforcing ribs for reinforcement; the tank bottom sets up stop device (3), prevents that pump well pipe (5) from producing too big horizontal hunting thereupon when immersed pump (2) work, and pump well pipe (5) of this position set up spacing backing plate (4) and strengthen.
2. The structure for supporting the top of the cryogenic storage tank pump well pipe and limiting the bottom of the tank as claimed in claim 1, wherein the pump well pipe (5), the dome sleeve (8), the dome (9) and the support ring (10) are connected by welding.
3. The tank top supporting and tank bottom limiting structure of the cryogenic storage tank pump well pipe as defined in claim 1, characterized in that the pump well pipe (5) is detachably connected with the ceiling cover plate (7) and the limiting device (3).
4. The tank top support and tank bottom limiting structure of the cryogenic storage tank pump well pipe according to claim 1, characterized in that the radial distance of the pump well pipe (5) at the fixed position of the dome top (9) and the tank bottom is 30mm to 120 mm.
5. The tank top supporting and tank bottom limiting structure of the cryogenic storage tank pump well pipe according to claim 1, characterized in that no welding is performed between the pump well pipe (5), the ceiling cover plate (7) and the ceiling sleeve (6), and the ceiling cover plate (7) falls on the ceiling sleeve (6) under the action of gravity.
6. The tank top supporting and tank bottom limiting structure of the low-temperature storage tank pump well pipe as defined in claim 1, wherein the difference of the radii among the straight sections of the pump well pipe (5), the ceiling sleeve (6) and the ceiling cover plate (7) is not less than the cold shrinkage of the ceiling and is 30 mm-120 mm.
7. The tank top support and tank bottom limiting structure of the cryogenic storage tank pump well pipe according to claim 1, characterized in that the pump well pipe (5) is free to move axially, and the limiting device (3) does not limit the movement of the pump well pipe (5) in the vertical direction.
8. The tank top support and tank bottom limiting structure of the well pipe of the cryogenic storage tank pump according to claim 1, characterized in that the limiting device (3) is an annular elastic limiting spring (3-1).
9. The structure of claim 1, wherein the ribs are not less than 4 pieces and are circumferentially and evenly spaced.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020501756.5U CN212361580U (en) | 2020-04-08 | 2020-04-08 | Tank top support and tank bottom limiting structure of low-temperature storage tank pump well pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020501756.5U CN212361580U (en) | 2020-04-08 | 2020-04-08 | Tank top support and tank bottom limiting structure of low-temperature storage tank pump well pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212361580U true CN212361580U (en) | 2021-01-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020501756.5U Active CN212361580U (en) | 2020-04-08 | 2020-04-08 | Tank top support and tank bottom limiting structure of low-temperature storage tank pump well pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212361580U (en) |
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2020
- 2020-04-08 CN CN202020501756.5U patent/CN212361580U/en active Active
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