WO1999037530A1 - Manhole door device - Google Patents

Manhole door device Download PDF

Info

Publication number
WO1999037530A1
WO1999037530A1 PCT/NO1999/000003 NO9900003W WO9937530A1 WO 1999037530 A1 WO1999037530 A1 WO 1999037530A1 NO 9900003 W NO9900003 W NO 9900003W WO 9937530 A1 WO9937530 A1 WO 9937530A1
Authority
WO
WIPO (PCT)
Prior art keywords
door
bolt
boss
lifting member
manhole
Prior art date
Application number
PCT/NO1999/000003
Other languages
French (fr)
Inventor
Roald Johansen
Original Assignee
Roald Johansen
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Roald Johansen filed Critical Roald Johansen
Priority to AU24421/99A priority Critical patent/AU2442199A/en
Publication of WO1999037530A1 publication Critical patent/WO1999037530A1/en

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D29/00—Independent underground or underwater structures; Retaining walls
    • E02D29/12—Manhole shafts; Other inspection or access chambers; Accessories therefor
    • E02D29/14—Covers for manholes or the like; Frames for covers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B19/00—Arrangements or adaptations of ports, doors, windows, port-holes, or other openings or covers
    • B63B19/12—Hatches; Hatchways
    • B63B19/14—Hatch covers
    • 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
    • B65D90/10—Manholes; Inspection openings; Covers therefor
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D29/00—Independent underground or underwater structures; Retaining walls
    • E02D29/12—Manhole shafts; Other inspection or access chambers; Accessories therefor
    • E02D29/14—Covers for manholes or the like; Frames for covers
    • E02D29/1427—Locking devices

Definitions

  • the present invention relates to a manhole door device, for being mounted flushing in a manhole in a deck of a ship or in a top of a tank.
  • Such doors which shall be able to withstand a high loading, are usually fastened by screwing with a large number of screws or bolts provided around the periphery of the door.
  • the large number of screws or bolts is a large drawback during opening and closing of the door. It has, therefore, been proposed to use a relatively to the door central tie bolt cooperating with a locking structure, for instance a yoke or similar, on the underside of the door.
  • the present invention relates to a further development of the latter idea.
  • the device according to the present invention is characterized in that the bolt, which is threaded and cooperates with a threaded boss in the locking structure, is provided with a lifting member, for instance a collar or similar, between the door and the boss, adapted to lift the door relatively to the deck of the ship or the top of the tank when the bolt is unscrewed. Thereby, the door will be lifted from the deck/top of the tank by unscrewing the bolt.
  • a lifting member for instance a collar or similar
  • the lifting member is conveniently fastened to the bolt in such a distance from the head of the bolt that a certain spacing remains between the lifting member and the underside of the deck when the bolt has been tightened.
  • the bolt may be slightly unscrewed from its fully tightened condition before the lifting member starts lifting the door, whereby the necessary torque applied to the bolt in order to start the unscrewing is not increased due to the lifting force.
  • the lifting force may be large in the initial phase, because a gasket between the door and the deck/top of the tank may have stuck to these in a sticking manner.
  • the lifting member locks the bolt relatively to the door in such a manner that the bolt does not loosen from the door after having been unscrewed from the boss.
  • the lifting member may comprise of different types of members. In addition to being a collar or ring it may for instance be a nut or ring having inner threads and which is screwed onto the bolt until it stops against a shoulder on the bolt. The nut or ring may be secured by a cotter or similar.
  • a lifting member is an 2 approximately U-shaped hoop fastened in transverse grooves in the bolt. Also a pin which is inserted through a transverse hole in the bolt may be used as lifting member.
  • Another example of a lifting member is a sleeve which surrounds the bolt and is fastened thereto in any manner in order to transmit lifting force from the bolt to the door. By lifting member is meant any member being fastened to the bolt and coming into contact with the underside of the door when the bolt is unscrewed for lifting of the door.
  • Fig. 1 shows in a plan view a monhole door in a deck or a top of a tank.
  • Figs. 2 and 3 show sections through the door of Fig. 1 , in a locked position and during opening, respectively.
  • the drawing shows a circular manhole door 1 provided in a manhole 2 in a deck of a ship or a top 3 of a tank in such a manner that the surface of the door 1 in the closed position is flush with the surface of the deck/top 3 of the tank.
  • the fact that the door is shown to be circular does not imply any restriction of the inventive idea, as the door may as well have another contour, as for instance oval or rectangular, possibly with rounded corners.
  • a shoulder surface is provided in the deck/top 3 of the tank, on which a circumferential gasket 4 is provided.
  • the shown locking structure 5 comprises an abutment ring 7, a boss 8 having inner threads and at least two yoke arms 9 between the ring 7 and the boss 8, and may by means of a hinge 6 be pivoted or tilted downwardly from the hole 2 and thereby permit access through the manhole after the door 1 has been removed.
  • a not shown pawl or similar catch device the locking structure 5 can be kept against the underside of the deck/top 3 of the tank when the door is to be locked in place by means of a bolt structure described in the following.
  • a cone can be used, which must have an opening in order to permit access from above to the locking device.
  • a bolt 10 Centrally relatively to the door 1 and in a recessed hub portion thereof is a bore, through which is inserted a bolt 10 having threads for cooperating with inner threads in the boss 8.
  • the bolt 10 serves, in cooperation with the boss 8, to lock the door 1 to the deck /top 3 of the tank.
  • a lifting member shown 3 as a ring or collar 11 between the door 1 and the boss 8, in order to lift the door 1 relatively to the deck/top 3 of the tank by unscrewing of the bolt 10 from the boss 8.
  • the lifting member 11 is fastened to the bolt 10 in such a distance from the head of the bolt that a certain spacing remains between the lifting member and the inside of the door when the door is locked.
  • the bolt 10 may be screwed up a certain degree relatively to the boss 8 before the lifting member 11 starts lifting the door 1 , whereby the necessary torque for starting unscrewing of the bolt 10 relatively to the boss 8 is not increased due simultaneous lifting of the door 1. In other words the lifting of the door 1 starts with a certain delay relatively to the unscrewing of the bolt 10.

Abstract

Manhole door (1) device, for being mounted flushing in a manhole (2) in a deck of a ship or in a top (3) of a tank, comprising a relatively to the door central locking bolt (10) adapted to cooperate with a locking structure (5) inside of the manhole. The bolt (10), which is threaded and cooperates with a threaded boss (8) in the locking structure (5), is provided with a lifting member (11) between the door (1) and the boss (8), in order to lift the door (1) relatively to the top of the tank or the deck (3) of the ship when the bolt (10) is unscrewed from the boss (8). The lifting member (11) may be fastened on the bolt (10) in such a distance from the head of the bolt that a certain spacing remains between the lifting member (11) and the underside of the door (1) when the door (1) is locked.

Description

1
Manhole Door Device.
The present invention relates to a manhole door device, for being mounted flushing in a manhole in a deck of a ship or in a top of a tank.
Such doors, which shall be able to withstand a high loading, are usually fastened by screwing with a large number of screws or bolts provided around the periphery of the door. The large number of screws or bolts is a large drawback during opening and closing of the door. It has, therefore, been proposed to use a relatively to the door central tie bolt cooperating with a locking structure, for instance a yoke or similar, on the underside of the door. The present invention relates to a further development of the latter idea.
The device according to the present invention is characterized in that the bolt, which is threaded and cooperates with a threaded boss in the locking structure, is provided with a lifting member, for instance a collar or similar, between the door and the boss, adapted to lift the door relatively to the deck of the ship or the top of the tank when the bolt is unscrewed. Thereby, the door will be lifted from the deck/top of the tank by unscrewing the bolt.
The lifting member is conveniently fastened to the bolt in such a distance from the head of the bolt that a certain spacing remains between the lifting member and the underside of the deck when the bolt has been tightened. Thereby, the bolt may be slightly unscrewed from its fully tightened condition before the lifting member starts lifting the door, whereby the necessary torque applied to the bolt in order to start the unscrewing is not increased due to the lifting force. The lifting force may be large in the initial phase, because a gasket between the door and the deck/top of the tank may have stuck to these in a sticking manner.
The lifting member locks the bolt relatively to the door in such a manner that the bolt does not loosen from the door after having been unscrewed from the boss.
The lifting member may comprise of different types of members. In addition to being a collar or ring it may for instance be a nut or ring having inner threads and which is screwed onto the bolt until it stops against a shoulder on the bolt. The nut or ring may be secured by a cotter or similar. Another example of a lifting member is an 2 approximately U-shaped hoop fastened in transverse grooves in the bolt. Also a pin which is inserted through a transverse hole in the bolt may be used as lifting member. Another example of a lifting member is a sleeve which surrounds the bolt and is fastened thereto in any manner in order to transmit lifting force from the bolt to the door. By lifting member is meant any member being fastened to the bolt and coming into contact with the underside of the door when the bolt is unscrewed for lifting of the door.
The invention will be described more detailed with reference to the accompanying drawing, showing an example of an embodiment of the invention.
Fig. 1 shows in a plan view a monhole door in a deck or a top of a tank. Figs. 2 and 3 show sections through the door of Fig. 1 , in a locked position and during opening, respectively.
The drawing shows a circular manhole door 1 provided in a manhole 2 in a deck of a ship or a top 3 of a tank in such a manner that the surface of the door 1 in the closed position is flush with the surface of the deck/top 3 of the tank. The fact that the door is shown to be circular does not imply any restriction of the inventive idea, as the door may as well have another contour, as for instance oval or rectangular, possibly with rounded corners. Around the hole 2 a shoulder surface is provided in the deck/top 3 of the tank, on which a circumferential gasket 4 is provided.
Below the hole 2 a locking structure 5 is provided for locking of the door 1. The shown locking structure 5 comprises an abutment ring 7, a boss 8 having inner threads and at least two yoke arms 9 between the ring 7 and the boss 8, and may by means of a hinge 6 be pivoted or tilted downwardly from the hole 2 and thereby permit access through the manhole after the door 1 has been removed. By means of a not shown pawl or similar catch device the locking structure 5 can be kept against the underside of the deck/top 3 of the tank when the door is to be locked in place by means of a bolt structure described in the following. Instead of the yoke arms 9 for instance a cone can be used, which must have an opening in order to permit access from above to the locking device.
Centrally relatively to the door 1 and in a recessed hub portion thereof is a bore, through which is inserted a bolt 10 having threads for cooperating with inner threads in the boss 8. The bolt 10 serves, in cooperation with the boss 8, to lock the door 1 to the deck /top 3 of the tank. On the bolt 10 is in a convenient manner fastened a lifting member, shown 3 as a ring or collar 11 between the door 1 and the boss 8, in order to lift the door 1 relatively to the deck/top 3 of the tank by unscrewing of the bolt 10 from the boss 8. Conveniently the lifting member 11 is fastened to the bolt 10 in such a distance from the head of the bolt that a certain spacing remains between the lifting member and the inside of the door when the door is locked. Thereby, the bolt 10 may be screwed up a certain degree relatively to the boss 8 before the lifting member 11 starts lifting the door 1 , whereby the necessary torque for starting unscrewing of the bolt 10 relatively to the boss 8 is not increased due simultaneous lifting of the door 1. In other words the lifting of the door 1 starts with a certain delay relatively to the unscrewing of the bolt 10.

Claims

4Claims.
1. Manhole door (1) device, for being mounted flushing in a manhole (2) in a deck of a ship or in a top (3) of a tank, comprising a relatively to the door central locking bolt (10) adapted to cooperate with a locking structure (5) inside of the manhole, characterized in that the bolt (10), which is threaded and cooperates with a threaded boss (8) in the locking structure (5), is provided with a lifting member (11) between the door (1) and the boss (8), in order to lift the door (1) relatively to the top of the tank or the deck (3) of the ship when the bolt (10) is unscrewed from the boss (8).
2. A device as specified in claim ^characterized in that the lifting member (11) is fastened on the bolt (10) in such a distance from the head of the bolt that a certain spacing remains between the lifting member (11) and the underside of the door (1) when the door (1) is locked.
PCT/NO1999/000003 1998-01-08 1999-01-06 Manhole door device WO1999037530A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU24421/99A AU2442199A (en) 1998-01-08 1999-01-06 Manhole door device

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NO980077A NO304974B1 (en) 1998-01-08 1998-01-08 Device at manhole cover for flush fitting in a manhole opening in a ship deck or tank top
NO19980077 1998-01-08

Publications (1)

Publication Number Publication Date
WO1999037530A1 true WO1999037530A1 (en) 1999-07-29

Family

ID=19901520

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NO1999/000003 WO1999037530A1 (en) 1998-01-08 1999-01-06 Manhole door device

Country Status (3)

Country Link
AU (1) AU2442199A (en)
NO (1) NO304974B1 (en)
WO (1) WO1999037530A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU173057U1 (en) * 2016-06-02 2017-08-08 Сергей Сергеевич Донбров Well shut-off device

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3025102A1 (en) * 1980-07-02 1982-04-22 Passavant-Werke AG & Co KG, 6209 Aarbergen Hygienic indoor area floor drain - has lid raisable only by special tool, and movable for water outflow
CH670614A5 (en) * 1985-10-21 1989-06-30 Werner Nill
DE4209069A1 (en) * 1992-03-20 1993-09-23 Passavant Werke Integral drive for moving manhole cover - has lifting cylinder located under cover and located on rotating arm to one of side of shaft
FR2719064A1 (en) * 1994-04-20 1995-10-27 Von Roll Ag Device for closing or covering a well.

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3025102A1 (en) * 1980-07-02 1982-04-22 Passavant-Werke AG & Co KG, 6209 Aarbergen Hygienic indoor area floor drain - has lid raisable only by special tool, and movable for water outflow
CH670614A5 (en) * 1985-10-21 1989-06-30 Werner Nill
DE4209069A1 (en) * 1992-03-20 1993-09-23 Passavant Werke Integral drive for moving manhole cover - has lifting cylinder located under cover and located on rotating arm to one of side of shaft
FR2719064A1 (en) * 1994-04-20 1995-10-27 Von Roll Ag Device for closing or covering a well.

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU173057U1 (en) * 2016-06-02 2017-08-08 Сергей Сергеевич Донбров Well shut-off device

Also Published As

Publication number Publication date
NO980077D0 (en) 1998-01-08
NO980077A (en) 1999-03-15
AU2442199A (en) 1999-08-09
NO304974B1 (en) 1999-03-15

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