CA1151831A - Tank - Google Patents
TankInfo
- Publication number
- CA1151831A CA1151831A CA000370896A CA370896A CA1151831A CA 1151831 A CA1151831 A CA 1151831A CA 000370896 A CA000370896 A CA 000370896A CA 370896 A CA370896 A CA 370896A CA 1151831 A CA1151831 A CA 1151831A
- Authority
- CA
- Canada
- Prior art keywords
- tank
- conduit
- wall
- building
- atmosphere
- 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.)
- Expired
Links
- 238000009413 insulation Methods 0.000 claims abstract description 12
- 239000012298 atmosphere Substances 0.000 claims abstract description 9
- 238000003860 storage Methods 0.000 claims abstract description 4
- 230000002093 peripheral effect Effects 0.000 claims description 6
- 230000015572 biosynthetic process Effects 0.000 claims description 5
- 238000009434 installation Methods 0.000 claims description 5
- 229910052729 chemical element Inorganic materials 0.000 claims 1
- 238000004140 cleaning Methods 0.000 description 9
- 230000008014 freezing Effects 0.000 description 4
- 238000007710 freezing Methods 0.000 description 4
- 239000007788 liquid Substances 0.000 description 3
- 230000001627 detrimental effect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000008267 milk Substances 0.000 description 2
- 235000013336 milk Nutrition 0.000 description 2
- 210000004080 milk Anatomy 0.000 description 2
- 241001465754 Metazoa Species 0.000 description 1
- 235000013365 dairy product Nutrition 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D90/00—Component parts, details or accessories for large containers
- B65D90/22—Safety features
- B65D90/32—Arrangements for preventing, or minimising the effect of, excessive or insufficient pressure
- B65D90/34—Venting means
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01J—MANUFACTURE OF DAIRY PRODUCTS
- A01J7/00—Accessories for milking machines or devices
- A01J7/02—Accessories for milking machines or devices for cleaning or sanitising milking machines or devices
- A01J7/027—Vessel cleaning, e.g. cleansing of milk tanks, milk vessels or milk separators
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01J—MANUFACTURE OF DAIRY PRODUCTS
- A01J9/00—Milk receptacles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D9/00—Containers having bodies formed by interconnecting or uniting two or more rigid, or substantially rigid, components made wholly or mainly of wood or substitutes therefor
- B65D9/32—Details of wooden walls; Connections between walls
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Animal Husbandry (AREA)
- Environmental Sciences (AREA)
- Mechanical Engineering (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
An outdoor storage tank is installed adjacent a building for supplying it and comprises an inner wall and an external cover which together form an annular insulation space. A pressure balancing conduit is arranged within the insulation space to communicate with the atmosphere in the top of the tank and with said building at the lower part of the tank.
An outdoor storage tank is installed adjacent a building for supplying it and comprises an inner wall and an external cover which together form an annular insulation space. A pressure balancing conduit is arranged within the insulation space to communicate with the atmosphere in the top of the tank and with said building at the lower part of the tank.
Description
33~L
The present invention relates to a tank having an essentially vertical peripheral wall comprisiny an internal wall and an external cover mounted outside said inner wall through spacing means so that an insulation space is formed between the inner wall and the cover, said tank being de-signed for out-door installation as a storage tank for an adjacent building to which the tank is to be connected at its lower part. The tank is also provided with a pressure balancing conduit to prevent the formation of overpressure or sub-atmospheric pressure in the tank that otherwise could arise, for example, during tank cleaning. The tank connec-tion to an adjacent building particularly refers to a kind oE
corridor arrangement between the storage tank and a plant building supplied by the tank. However, the invention can be practised for any application in which the tank is connected at its lower part to an indoor space, such as a smaller service room built directly next to the tank.
To eliminate the formation of detrimental over-pressure or subpressures within a closed tank during opera-tions such as filling, draining or cleaning, there is re-quired a pressure balancing conduit which brings the atmos-phere inside the tank in communication with the environment through an opening in the top of the tank. The risk of damage is naturally particularly great upon the formation of subpressure, since comparatively modest subpressures can squeeze the tank together. An example of a situation in which a detrimental subpressure easily arises is the clean ing of a tank through cleaning means installed in the tank, the tank atmosphere through contact with the warm cleaning liquid attaininy increased temperature and increased vapor content before it is rapidly cooled off. For balancing the ~5~83~
pressure rapidly enough, the pressure balance conduit mtlsk have a sufficient cross-sectional area. For milk tanks of about 50 m3, for example, pressure equalizing tubes with a diameter in the range oE 150-200 mm have been used. For reasons of simplicity, stack-like openings in the top of the tank have been used as pressure balancing condui-ts. Despite use of screening elements and the like, pollution of the tank content by particles,~small animals, etc. from the am-bient atmosphere cannot be completely avoided. Further, in geographical zones having cold periods, clogging through freezing in the screen elements or conduit openings easily occurs. The pollution problem is naturally particularly severe in the case of tanks for food stuf~s, such as a milk tank outside a dairy building. In such applications, any freezing problem is also accentuated due to formation of vapor and condensate in context with frequent draining and filling operations and particularly from the intermediate cleaning cycles.
As a remedy for such pollution and freezing prob-lems in tanks erected beside a building to supply the same, it has been suggested to install a connection tube from the top of the tank either directly lnto the building or down to a corridor at the tank base. The term corridor is used in this context to mean any connection passage extending between the tank and the adjacent building and which is closed with respect to the environment. Such a passage can, for example, serve as a walk-way between the building and a manhole in the tank, as a culvert for pipes and cables between the tank and the building, as housing for tank equipment, etc.
In the installation of the tank, special individual ;`
connection work is required for the comparatively large ~5~33~1L
pressure balancing tube as well as for the other pipes re-quired outside the tank, such as tubes for cleaning and for overfill protection. Further, in places having cold seasons, the different tubes must be insulated to prevent freezing.
Objects of the present invention are to eliminate said pipes outside the tank in an advantageous way from the point of view of economical manufacture and to reduce the connection work, at the place of installation, with respect to the pressure balancing conduit and possibly also the clean-ing line and the over-fill protection tube.
These objects have been attained in a tank of the above-mentioned kind which is mainly characterized in that the pressure balancing conduit is arranged within the in-sulation space between the tank inner, wall and the tank cover, said conduit communicating at the top part of the tank with the atmosphere in the tank and at the lower part of the tank with said building.
According to the invention, the comparatively ' large cross-sectional area of the pressure balancing conduit is obtained by causing the cross-section of the conduit to extend much longer in the peripheral direction of -the tank than across the peripheral wall of the tank, thereby adapt-ing said cross-section to the shape of the tank so that the conduit is completely included within the insulation space between the tank inner wall and the external cover of the tank. In this way also, manufacturing advantages are ob- ~, tained in that half of the conduit already exists as being constituted by the tank inner wall itself, and the rest of `' the conduit envelope is obtained by welding a simple plate element to the tank inner wall along two essentially verti~
cal edges.
33~l Other advantages and details of the invention will be obvious from the following description in conjunction with the accompanying drawings of an example of the invention.
In the drawings, Fig. 1 is a vertical sectional view of an uninsulated tank at the place o~ installation, and Fig. 2 is a horizontal sectional view on line I~-II in Flg. 1 but after the addition of insulation and the external cover.
The tank 1 is connected at its lower part to a building 3 through a corridor 2. The tank has a cylindrical inner wall 4 and an external cover 7 (shown in broken lines in Fig. 1~ arranged around the wall 4 through spacing means 5 and 6, so that an insulation space 8 (~ig. 2) with an annular cross-section is formed between the inner ~all 4 and the external cover 7. As shown in Fig. 2, part of the annular insulation space 8 located within the corridor sector contains a plate element 9 fixed to the inner wall 4 along two vertical edges to form together with said wall a pressure balancing conduit 10 having a long, thin cross-section.
The pressure balancing conduit 10 opens at the top into the tank 1 by way of a slot 11 through the tank inner wall 4, said slot extending along the whole width of the conduit 10. At the lower part of the tank, conduit 10 opens into the corridor 2 underneath the lower end of plate 9.
To collect any condensate and o~erflow liquid, a collecting gutter 12 is formed by a plate element fixed to the tank inner wall 4. The gutter 12 is drained through a draining line 13.
Within the pressure balancing conduit 10, a line 14 for cleaning liquid is mounted and leads up to the usual spreader device (not shown) in the top of the tank.
~51~3~
As shown in Fig. 2, the pressure balancing conduit 10 is made thin enough to provide space for a thin insulation layer between the conduit and the external cover 7. For in-stallations that are never to be subjected to low external temperatures, insulation mass outside the pressure balancing conduit can be spared. This is because the conduit, being connected to -the atmosphere in the building ana -the atmosphere in the tank, offers sufficient insulation.
Advantageously, the other service lines from the building 3 to the top of the tank, such as electrical cables for illumination and level control, can be installed in the pressure balancing conduit 10. Because of the elongated slot opening 11 in the top of the tank and the collecting gutter 12 connected to the draining line 13, the pressure balancing conduit also serves as an efficient over-Lill protection.
The present invention relates to a tank having an essentially vertical peripheral wall comprisiny an internal wall and an external cover mounted outside said inner wall through spacing means so that an insulation space is formed between the inner wall and the cover, said tank being de-signed for out-door installation as a storage tank for an adjacent building to which the tank is to be connected at its lower part. The tank is also provided with a pressure balancing conduit to prevent the formation of overpressure or sub-atmospheric pressure in the tank that otherwise could arise, for example, during tank cleaning. The tank connec-tion to an adjacent building particularly refers to a kind oE
corridor arrangement between the storage tank and a plant building supplied by the tank. However, the invention can be practised for any application in which the tank is connected at its lower part to an indoor space, such as a smaller service room built directly next to the tank.
To eliminate the formation of detrimental over-pressure or subpressures within a closed tank during opera-tions such as filling, draining or cleaning, there is re-quired a pressure balancing conduit which brings the atmos-phere inside the tank in communication with the environment through an opening in the top of the tank. The risk of damage is naturally particularly great upon the formation of subpressure, since comparatively modest subpressures can squeeze the tank together. An example of a situation in which a detrimental subpressure easily arises is the clean ing of a tank through cleaning means installed in the tank, the tank atmosphere through contact with the warm cleaning liquid attaininy increased temperature and increased vapor content before it is rapidly cooled off. For balancing the ~5~83~
pressure rapidly enough, the pressure balance conduit mtlsk have a sufficient cross-sectional area. For milk tanks of about 50 m3, for example, pressure equalizing tubes with a diameter in the range oE 150-200 mm have been used. For reasons of simplicity, stack-like openings in the top of the tank have been used as pressure balancing condui-ts. Despite use of screening elements and the like, pollution of the tank content by particles,~small animals, etc. from the am-bient atmosphere cannot be completely avoided. Further, in geographical zones having cold periods, clogging through freezing in the screen elements or conduit openings easily occurs. The pollution problem is naturally particularly severe in the case of tanks for food stuf~s, such as a milk tank outside a dairy building. In such applications, any freezing problem is also accentuated due to formation of vapor and condensate in context with frequent draining and filling operations and particularly from the intermediate cleaning cycles.
As a remedy for such pollution and freezing prob-lems in tanks erected beside a building to supply the same, it has been suggested to install a connection tube from the top of the tank either directly lnto the building or down to a corridor at the tank base. The term corridor is used in this context to mean any connection passage extending between the tank and the adjacent building and which is closed with respect to the environment. Such a passage can, for example, serve as a walk-way between the building and a manhole in the tank, as a culvert for pipes and cables between the tank and the building, as housing for tank equipment, etc.
In the installation of the tank, special individual ;`
connection work is required for the comparatively large ~5~33~1L
pressure balancing tube as well as for the other pipes re-quired outside the tank, such as tubes for cleaning and for overfill protection. Further, in places having cold seasons, the different tubes must be insulated to prevent freezing.
Objects of the present invention are to eliminate said pipes outside the tank in an advantageous way from the point of view of economical manufacture and to reduce the connection work, at the place of installation, with respect to the pressure balancing conduit and possibly also the clean-ing line and the over-fill protection tube.
These objects have been attained in a tank of the above-mentioned kind which is mainly characterized in that the pressure balancing conduit is arranged within the in-sulation space between the tank inner, wall and the tank cover, said conduit communicating at the top part of the tank with the atmosphere in the tank and at the lower part of the tank with said building.
According to the invention, the comparatively ' large cross-sectional area of the pressure balancing conduit is obtained by causing the cross-section of the conduit to extend much longer in the peripheral direction of -the tank than across the peripheral wall of the tank, thereby adapt-ing said cross-section to the shape of the tank so that the conduit is completely included within the insulation space between the tank inner wall and the external cover of the tank. In this way also, manufacturing advantages are ob- ~, tained in that half of the conduit already exists as being constituted by the tank inner wall itself, and the rest of `' the conduit envelope is obtained by welding a simple plate element to the tank inner wall along two essentially verti~
cal edges.
33~l Other advantages and details of the invention will be obvious from the following description in conjunction with the accompanying drawings of an example of the invention.
In the drawings, Fig. 1 is a vertical sectional view of an uninsulated tank at the place o~ installation, and Fig. 2 is a horizontal sectional view on line I~-II in Flg. 1 but after the addition of insulation and the external cover.
The tank 1 is connected at its lower part to a building 3 through a corridor 2. The tank has a cylindrical inner wall 4 and an external cover 7 (shown in broken lines in Fig. 1~ arranged around the wall 4 through spacing means 5 and 6, so that an insulation space 8 (~ig. 2) with an annular cross-section is formed between the inner ~all 4 and the external cover 7. As shown in Fig. 2, part of the annular insulation space 8 located within the corridor sector contains a plate element 9 fixed to the inner wall 4 along two vertical edges to form together with said wall a pressure balancing conduit 10 having a long, thin cross-section.
The pressure balancing conduit 10 opens at the top into the tank 1 by way of a slot 11 through the tank inner wall 4, said slot extending along the whole width of the conduit 10. At the lower part of the tank, conduit 10 opens into the corridor 2 underneath the lower end of plate 9.
To collect any condensate and o~erflow liquid, a collecting gutter 12 is formed by a plate element fixed to the tank inner wall 4. The gutter 12 is drained through a draining line 13.
Within the pressure balancing conduit 10, a line 14 for cleaning liquid is mounted and leads up to the usual spreader device (not shown) in the top of the tank.
~51~3~
As shown in Fig. 2, the pressure balancing conduit 10 is made thin enough to provide space for a thin insulation layer between the conduit and the external cover 7. For in-stallations that are never to be subjected to low external temperatures, insulation mass outside the pressure balancing conduit can be spared. This is because the conduit, being connected to -the atmosphere in the building ana -the atmosphere in the tank, offers sufficient insulation.
Advantageously, the other service lines from the building 3 to the top of the tank, such as electrical cables for illumination and level control, can be installed in the pressure balancing conduit 10. Because of the elongated slot opening 11 in the top of the tank and the collecting gutter 12 connected to the draining line 13, the pressure balancing conduit also serves as an efficient over-Lill protection.
Claims (7)
1. A tank comprising a substantially vertical peripheral wall including an inner wall and an external cover mounted outside said inner wall in spaced relation thereto, said inner wall and cover forming an insulation space there-between, the tank being adapted for outdoor installation as a storage tank for an adjacent building and having at its lower portion an opening through which the interior of the tank can be brought into communication with the building, and a pressure balancing conduit located within said insula-tion space and having an upper portion communicating with the atmosphere in the upper part of the tank, the conduit also having a lower portion communicating with said opening, whereby the conduit prevents formation of an over-pressure or a sub-atmospheric pressure in the tank.
2. The tank of claim 1, in which the cross-section of said conduit is considerably more extended in the peripheral direction of the tank than across said peripheral wall.
3. The tank of claim 1, in which said conduit is formed partly by said inner wall and partly by a plate ele-ment fixed to the inner wall along two substantially vertical edges.
4. The tank of claim 1, comprising also a service line located within said conduit.
5. The tank of claim 1, comprising also a gutter underlying said conduit for receiving therefrom an overflow from the upper part of the tank.
6. The tank of claim 1, in which the tank has the shape of a vertical cylinder.
7. The tank of claim 1, in which said inner wall has at its upper portion a substantially horizontal slot through which said conduit communicates with the atmosphere in the upper part of the tank.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE8001162A SE420076B (en) | 1980-02-14 | 1980-02-14 | DOUBLE WALL TANK |
| SE8001162-0 | 1980-02-14 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1151831A true CA1151831A (en) | 1983-08-16 |
Family
ID=20340248
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000370896A Expired CA1151831A (en) | 1980-02-14 | 1981-02-13 | Tank |
Country Status (8)
| Country | Link |
|---|---|
| AU (1) | AU523298B2 (en) |
| CA (1) | CA1151831A (en) |
| DE (1) | DE3105326A1 (en) |
| DK (1) | DK148627C (en) |
| FR (1) | FR2476039A1 (en) |
| GB (1) | GB2071747B (en) |
| NL (1) | NL8100717A (en) |
| SE (1) | SE420076B (en) |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE149086C (en) * | ||||
| DE1223132B (en) * | 1960-11-02 | 1966-08-18 | Wilke Werke Ag | Heatable steel silo |
| JPS5547735Y2 (en) * | 1976-03-26 | 1980-11-08 | ||
| DE2715458A1 (en) * | 1977-04-06 | 1978-10-12 | Jules Egli Ag Bauunternehmung | Liq. tank jacket vent system - with greater heat transfer to air in safety chamber near outlet at top to generate draught |
-
1980
- 1980-02-14 SE SE8001162A patent/SE420076B/en not_active IP Right Cessation
-
1981
- 1981-01-30 FR FR8101893A patent/FR2476039A1/en active Granted
- 1981-02-04 GB GB8103356A patent/GB2071747B/en not_active Expired
- 1981-02-12 DK DK59381A patent/DK148627C/en not_active IP Right Cessation
- 1981-02-13 CA CA000370896A patent/CA1151831A/en not_active Expired
- 1981-02-13 AU AU67280/81A patent/AU523298B2/en not_active Ceased
- 1981-02-13 NL NL8100717A patent/NL8100717A/en not_active Application Discontinuation
- 1981-02-13 DE DE19813105326 patent/DE3105326A1/en not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| DK59381A (en) | 1981-08-15 |
| DK148627B (en) | 1985-08-19 |
| DK148627C (en) | 1986-04-28 |
| NL8100717A (en) | 1981-09-16 |
| FR2476039A1 (en) | 1981-08-21 |
| SE8001162L (en) | 1981-08-15 |
| GB2071747B (en) | 1983-01-06 |
| AU523298B2 (en) | 1982-07-22 |
| DE3105326A1 (en) | 1981-12-17 |
| FR2476039B1 (en) | 1984-07-20 |
| SE420076B (en) | 1981-09-14 |
| GB2071747A (en) | 1981-09-23 |
| AU6728081A (en) | 1981-09-17 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |