CN111396738A - Combined supporting structure of low-temperature storage tank pump well pipe - Google Patents
Combined supporting structure of low-temperature storage tank pump well pipe Download PDFInfo
- Publication number
- CN111396738A CN111396738A CN202010269993.8A CN202010269993A CN111396738A CN 111396738 A CN111396738 A CN 111396738A CN 202010269993 A CN202010269993 A CN 202010269993A CN 111396738 A CN111396738 A CN 111396738A
- Authority
- CN
- China
- Prior art keywords
- pump well
- well pipe
- pump
- ceiling
- sleeve
- 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.)
- Granted
Links
- 230000005484 gravity Effects 0.000 claims abstract description 12
- 238000006073 displacement reaction Methods 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 7
- 230000003014 reinforcing effect Effects 0.000 claims description 6
- 230000002787 reinforcement Effects 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 230000000452 restraining effect Effects 0.000 claims description 2
- 239000003351 stiffener Substances 0.000 claims 1
- 239000004215 Carbon black (E152) Substances 0.000 abstract description 7
- 229930195733 hydrocarbon Natural products 0.000 abstract description 7
- 150000002430 hydrocarbons Chemical class 0.000 abstract description 7
- 239000003949 liquefied natural gas Substances 0.000 abstract description 6
- 238000009434 installation Methods 0.000 abstract 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C1/00—Pressure vessels, e.g. gas cylinder, gas tank, replaceable cartridge
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
- F04B39/0027—Pulsation and noise damping means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C13/00—Details of vessels or of the filling or discharging of vessels
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The invention discloses a combined supporting structure of a pump well pipe of a low-temperature storage tank, which is characterized in that the pump well pipe is fixed at a plurality of positions of a vault of the storage tank and the wall of an inner tank, and the gravity of a pump well is shared by the top of the tank and the wall of the inner tank; the dome around the pump well casing need not be locally reinforced; 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 inner tank wall is provided with a limiting device, so that the pump well pipe is prevented from generating overlarge horizontal swing, and the gravity of the pump well pipe is borne. The structure can be used for fixing and supporting the pump well of the large-scale liquefied hydrocarbon and liquefied natural gas double-wall cryogenic storage tank. The structure can well control the horizontal vibration of the pump well pipe and can effectively reduce the stress of the pump well pipe in a working state.
Description
Technical Field
The invention relates to a double-wall low-temperature storage tank for liquefied hydrocarbon and liquefied natural gas, in particular to a fixing and supporting structure for a pump well of the low-temperature storage tank.
Background
With the increasing attention paid to environmental protection in the world, the consumption of clean energy such as liquefied Hydrocarbon (L iquefied Hydrocarbon) and liquefied Natural Gas (L iquefied Natural Gas, hereinafter, L NG) is increasing, and the demand for large-sized cryogenic storage tanks for liquefied Hydrocarbon and liquefied Natural Gas is also increasing.
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, the pump well pipe can not break due to overlarge axial stress, the horizontal vibration of the pump well pipe in a working state can be effectively reduced, and the fact that the low-temperature storage tank can run safely and stably is guaranteed, so that the supporting structure has important practical significance.
Disclosure of Invention
The invention aims to provide a combined supporting structure for a pump well pipe of a low-temperature storage tank. The structure can well control the horizontal vibration of the pump well pipe, effectively reduce the stress of the pump well pipe in a working state and ensure that the low-temperature storage tank can safely and stably run.
In order to achieve the purpose, the technical scheme of the invention is as follows: a combined supporting structure of a pump well pipe of a low-temperature storage tank 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; the pump well is characterized in that a pump well pipe is fixed at a plurality of positions of a vault and the inner tank wall, and the gravity of the pump well is shared by the vault and the inner tank wall; the pump well pipe is fixed on the vault through a support ring and a vault sleeve; limiting devices are arranged on the inner tank wall at a plurality of positions to prevent the pump well pipe from generating excessive horizontal swing when the immersed pump works, and limiting base plates are arranged on the pump well pipes at the positions for reinforcement; a small part of weight of the pump well pipe is borne by the vault, a small part of weight of the pump well pipe is borne by the limiting device, and the gravity of the pump well pipe is borne dispersedly, so that the axial stress of the pump well pipe is reduced to a great extent, and the load of the pump well pipe on the vault is reduced.
A combined supporting structure of a pump well pipe of a low-temperature storage tank is characterized in that the pump well pipe, a vault sleeve, a vault and a supporting ring are connected in a welding mode.
A combined supporting structure of a pump well pipe of a low-temperature storage tank is characterized in that the pump well pipe is detachably connected with a ceiling cover plate and a limiting device.
A combined supporting structure of a pump well pipe of a low-temperature storage tank is characterized in that a reinforcing rib is arranged outside a vault sleeve.
The utility model provides a joint bearing structure of low temperature storage tank pump well pipe, characterized by does not weld between pump well pipe, furred ceiling apron and furred ceiling sleeve, 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 combined supporting structure of a pump well pipe of a low-temperature storage tank 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 is 30-120 mm, so that the horizontal displacement of the pump well pipe is not limited by the suspended ceiling.
A combined supporting structure for the pump well pipe of low-temp storage tank features that the radial distance between the top and bottom of pump well pipe is 30-120 mm, which is determined by the radius of internal tank, operating temp and linear expansion coefficient of internal tank material.
A combined supporting structure of a pump well pipe of a low-temperature storage tank is characterized in that a limiting device does not limit the movement of the pump well pipe in the vertical direction, the pump well pipe can freely move along the axial direction, and the pump well pipe cannot generate overlarge axial stress.
A combined supporting structure of a pump well pipe of a low-temperature storage tank 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.
The invention relates to a combined supporting structure of a pump well pipe of a low-temperature storage tank, which can be used for fixing and supporting a double-wall low-temperature storage tank pump well of large liquefied hydrocarbon and liquefied natural gas. The structure can well control the horizontal vibration of the pump well pipe and can effectively reduce the stress of the pump well pipe in a working state.
Drawings
In order to more clearly illustrate the embodiments or technical solutions of the present invention, the drawings used in 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 it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive step.
FIG. 1 is a schematic view of a joint support structure for a cryogenic tank pump well tubing.
Fig. 2 is a top view of the spacing device.
Description of reference numerals: the device comprises an inner tank 1, an immersed pump 2, a limiting device 3, an elastic limiting spring 3-1, a limiting base plate 4, a pump well pipe 5, a ceiling sleeve 6, a ceiling cover plate 7, a vault sleeve 8, a vault sleeve reinforcing rib 8-1, a vault 9 and a support ring 10.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the examples of the present invention without any inventive step, are within the scope of the present invention.
The present invention is described in detail below with reference to the attached drawings.
As shown in figure 1, the combined supporting structure of the pump well pipe of the cryogenic storage tank can be used for fixing and supporting a double-wall cryogenic storage tank pump well of large-scale 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 a small part of the weight of the pump well casing 5 is taken up 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 thickness of support ring is 10 ~ 20mm usually, and the thickness of vault sleeve 8 is 10mm ~ 30mm usually.
The dome 9 bears less weight on the pump well pipe 5 and no additional reinforcement of the dome sleeve 8, the dome 9 and the support ring 10 is required. If the rigidity of the structure is increased, a reinforcing rib 8-1 can be arranged outside the dome sleeve 8. The material of the reinforcing ribs 8-1 should be the same as the dome sleeve 8, and the thickness thereof is usually 6mm to 16 mm. The reinforcing ribs 8-1 are usually not less than 4 pieces and are circumferentially and uniformly distributed.
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 inner tank wall 1 is provided with a plurality of position-limiting devices 3 to prevent the pump well pipe 5 from generating excessive horizontal swing when the immersed pump 3 operates. The pump well pipe 5 at these positions should be reinforced by a limiting cushion plate 4. The limiting device 3 adopts an annular elastic limiting spring 3-1 (such as a spring with lower rigidity) and can effectively reduce the restraining force on the pump well pipe 5.
The limiting device 3 bears most of the gravity of the pump well pipe 5 in an elastic limiting mode. In this way, the gravity of the pump well pipe 5 is distributed and borne, the axial stress of the pump well pipe 5 is greatly reduced, and the load of the pump well pipe 5 on the dome 9 is reduced.
The above description is only an embodiment of the present invention, but the 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 intended to be covered by the scope of the present invention.
Claims (10)
1. A combined supporting 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); the pump well is characterized in that the pump well pipe (5) is fixed at a plurality of positions of the vault (9) and the inner tank wall, and the gravity of the pump well is shared by the vault (9) and the inner tank wall; the pump well pipe (5) is fixed on the dome (9) through a support ring (10) and a dome sleeve (8); limiting devices (3) are arranged on the wall of the inner tank (1) at a plurality of positions, so that a pump well pipe (5) is prevented from generating excessive horizontal swing when the immersed pump (3) works, and a limiting base plate (4) is arranged at the position of the pump well pipe (5) provided with the limiting devices (3) for reinforcement; a small part of the weight of the pump well pipe (5) is borne by the vault (9), a small part of the weight is borne by the limiting device (3), and the gravity of the pump well pipe (5) is dispersedly borne, so that the axial stress of the pump well pipe (5) is reduced to a great extent, and the load of the pump well pipe (5) on the vault (9) is reduced.
2. A joint support structure for pump well pipes of cryogenic storage tanks according to claim 1, characterized in that the pump well pipes (5), the dome sleeve (8), the dome (9) and the support ring (10) are connected by welding.
3. The joint support structure of the pump well pipe of the cryogenic storage tank as claimed in claim 1, wherein the pump well pipe (5) is detachably connected with the ceiling cover plate (7) and the limiting device (3).
4. A joint support structure for well pipes of cryogenic storage tanks pumps according to claim 1, characterized in that outside the dome sleeve (8) there are arranged stiffeners (8-1).
5. A joint support structure for pump well pipes for cryogenic storage tanks according to claim 1, characterized in that the pump well pipes (5), the ceiling cover plate (7) and the ceiling sleeve (6) are not welded, the ceiling cover plate (7) falling under gravity onto the ceiling sleeve (6), so that the axial displacement of the pump well pipes (5) is not limited by the ceiling.
6. The joint support structure of the pump well pipe of the cryogenic storage tank as claimed 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 30mm to 120mm, so as to ensure that the horizontal displacement of the pump well pipe (5) is not limited by the ceiling.
7. A united support structure for pump well pipes for cryogenic storage tanks according to claim 1, characterized in that the radial distance of the pump well pipes (5) at the dome (9) and bottom fixing locations of the tank is 30mm to 120mm, determined on the basis of the radius of the inner tank, the operating temperature and the linear expansion coefficient of the material of the inner tank.
8. A joint support structure for pump well pipes of cryogenic storage tanks according to claim 1, characterized in that the stop means (3) do not limit the movement of the pump well pipes (5) in the vertical direction, the pump well pipes (5) can move freely in the axial direction, and the pump well pipes (5) do not generate excessive axial stress.
9. The joint support structure of the pump well pipe of the cryogenic storage tank as claimed in claim 1, wherein the limiting device (3) is an annular elastic limiting spring (3-1) which can effectively reduce the restraining force on the pump well pipe (5).
10. A joint support structure for well pipes of cryogenic storage tanks pumps according to claim 4 characterized in that the reinforcing ribs (8-1) are usually not less than 4 pieces and are circumferentially equispaced.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010269993.8A CN111396738B (en) | 2020-04-08 | 2020-04-08 | Combined supporting structure of low-temperature storage tank pump well pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010269993.8A CN111396738B (en) | 2020-04-08 | 2020-04-08 | Combined supporting structure of low-temperature storage tank pump well pipe |
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| Publication Number | Publication Date |
|---|---|
| CN111396738A true CN111396738A (en) | 2020-07-10 |
| CN111396738B CN111396738B (en) | 2024-10-11 |
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| CN202010269993.8A Active CN111396738B (en) | 2020-04-08 | 2020-04-08 | Combined supporting structure of low-temperature storage tank pump well pipe |
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| Publication number | Publication date |
|---|---|
| CN111396738B (en) | 2024-10-11 |
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