CN111305163B - Hydraulic lifting watertight door - Google Patents
Hydraulic lifting watertight door Download PDFInfo
- Publication number
- CN111305163B CN111305163B CN202010249922.1A CN202010249922A CN111305163B CN 111305163 B CN111305163 B CN 111305163B CN 202010249922 A CN202010249922 A CN 202010249922A CN 111305163 B CN111305163 B CN 111305163B
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- China
- Prior art keywords
- pulleys
- wire rope
- driving
- steel wire
- door
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- 229910000831 Steel Inorganic materials 0.000 claims description 57
- 239000010959 steel Substances 0.000 claims description 57
- 239000010720 hydraulic oil Substances 0.000 claims description 10
- 239000003921 oil Substances 0.000 claims description 10
- 230000005540 biological transmission Effects 0.000 claims description 8
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B7/00—Barrages or weirs; Layout, construction, methods of, or devices for, making same
- E02B7/20—Movable barrages; Lock or dry-dock gates
- E02B7/26—Vertical-lift gates
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B7/00—Barrages or weirs; Layout, construction, methods of, or devices for, making same
- E02B7/20—Movable barrages; Lock or dry-dock gates
- E02B7/26—Vertical-lift gates
- E02B7/36—Elevating mechanisms for vertical-lift gates
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- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Special Wing (AREA)
Abstract
The invention discloses a hydraulic lifting watertight door which comprises a door frame and a door body, wherein the door body can move up and down and is arranged in the door frame, a safety device for improving safety is arranged at the upper end of the door frame, and a driving device for driving the door body to move up and down is arranged above the door frame; a hydraulic lifting watertight door is through addding safety device, and then when hydraulic lifting watertight door opens, the relief pin can insert in the lockhole on the door body wire rope fixing base to realize locking, prevent that wire rope fracture back door body from appearing falling, improved the security greatly, and hydraulic lifting watertight door's drive arrangement is provided with first wire rope, 2 wire ropes altogether, wherein, mainly promotes through first wire rope, when first wire rope appears the fracture, second wire rope can play the guard action, also can be used for opening and close the door body temporarily, has improved the security greatly.
Description
Technical Field
The invention relates to a watertight door, in particular to a hydraulic lifting watertight door.
Background
A watertight door is a door with high tightness. The existing hydraulic lifting watertight door has the problems of complex structure and high manufacturing cost, and has a certain falling risk and high potential safety hazard for the hydraulic lifting watertight door with high weight, so that the problem needs to be solved urgently.
Disclosure of Invention
The invention aims to solve the problems that an existing hydraulic lifting watertight door is complex in structure, high in manufacturing cost and high in potential safety hazard.
The invention aims at realizing the following technical scheme:
The hydraulic lifting watertight door comprises a door frame and a door body, wherein the door body can move up and down and is arranged in the door frame, a safety device for improving safety is arranged at the upper end of the door frame, and a driving device for driving the door body to move up and down is arranged above the door frame;
The driving device comprises a support, a steel wire rope fixing seat, a first pulley block, a second pulley block, a first steel wire rope, a second steel wire rope, a first steel wire rope connector, a second steel wire rope connector and a hydraulic oil cylinder, wherein the hydraulic oil cylinder is fixedly arranged on an oil cylinder seat, the hydraulic oil cylinder is horizontally arranged, the oil cylinder seat is fixed on the support, the extension direction of a piston rod of the hydraulic oil cylinder is defined as a first direction, a movable seat is arranged on the support, the movable seat can move along the first direction, the movable seat is connected with the piston rod end of the hydraulic oil cylinder, the first pulley block comprises a first pulley a and a first pulley b which are arranged side by side at intervals along the first direction, the first pulley a is arranged on the movable seat, the first pulley b is arranged at one end of the support in the first direction, the first steel wire rope connector is positioned below the first pulley b, the second pulley block comprises a second pulley a and a second pulley b which are arranged side by side and at intervals along a first direction, the second pulley a is arranged on the movable seat, the second pulley b is arranged at the end head of the other end of the support in the first direction, the second steel wire rope connector is positioned below the second pulley b, one end of the first steel wire rope is fixed on the first steel wire rope connector, the other end of the first steel wire rope is connected with the steel wire rope fixing seat after passing through the first pulley block and the first pulley group, one end of the second steel wire rope is fixed on the second steel wire rope connector, the other end of the second steel wire rope is connected with the steel wire rope fixing seat after passing through the second pulley block and the second pulley group, the steel wire rope fixing seat is fixed on a door body of the hydraulic lifting watertight door;
the safety device comprises a first base, a second base, a safety pin horizontally arranged and a driving assembly for driving the safety pin to horizontally move, wherein the first base is fixed on a mounting seat, the second base is fixed on the mounting seat, the first base and the second base are arranged at intervals, a containing space is formed between the first base and the second base, a first pin hole matched with the safety pin is formed in the first base along the first direction, a second pin hole matched with the safety pin is formed in the second base along the first direction, the second pin hole is correspondingly arranged with the first pin hole, and a lock hole matched with the safety pin is formed in the wire rope fixing seat along the first direction; under the locking state, first pinhole, lockhole, second pinhole are on a straight line, and the relief pin removes and passes first pinhole, lockhole, second pinhole in proper order along first direction under drive assembly's drive to realize locking.
As a preferable mode of the present invention, a direction perpendicular to the first direction in the same plane is defined as a second direction, the number of the first pulleys a is plural, the number of the first pulleys b is plural, the number of the first pulleys a is the same as the number of the first pulleys b, the plurality of the first pulleys a are arranged side by side along the second direction, and the plurality of the first pulleys b are arranged side by side along the second direction; the number of the second pulleys a is the same as the number of the second pulleys b, the second pulleys a are arranged side by side along the second direction, and the second pulleys b are arranged side by side along the second direction.
As a preferable scheme of the invention, the number of the first pulleys a is 2, and the number of the corresponding first pulleys b is 2; the number of the second pulleys a is 2, and the number of the second pulleys b is 2 correspondingly.
As a preferred embodiment of the present invention, the diameter of the first wire rope is larger than the diameter of the second wire rope.
As a preferable scheme of the invention, a sliding rail is arranged on the support along the first direction, and a sliding block matched with the sliding rail is arranged at the lower end of the movable seat.
As a preferred scheme of the invention, the driving assembly comprises a driving oil cylinder, a connecting rod and a driving part, wherein the driving part is of an L-shaped structure and comprises a first driving rod and a second driving rod, one end of the first driving rod is connected with one end of the second driving rod, a hinge hole is formed in a joint of the driving part, which is positioned on the first driving rod and the second driving rod, the driving part is hinged on the mounting seat, the connecting rod is arranged in the vertical direction, a piston rod of the driving oil cylinder extends downwards and is fixedly connected with the upper end of the connecting rod, a first long-strip-shaped hole is formed in the other end of the first driving rod in the arrangement direction of the first driving rod, the other end of the first driving rod is connected with the lower end of the connecting rod through a first pin roll, a second long-strip-shaped hole is formed in the other end of the second driving rod in the arrangement direction of the second driving rod, and the other end of the second driving rod is connected with one end of the safety pin through a second pin roll.
As a preferable scheme of the invention, limit seat plates are arranged at two ends of the steel wire rope fixing seat, and limit rods matched with the limit seat plates are arranged on the first base and the second base.
As a preferable mode of the invention, the first transmission rod and the second transmission rod are of an integrated structure.
The hydraulic lifting watertight door has the beneficial effects that the safety device is additionally arranged, so that when the hydraulic lifting watertight door is opened, the safety pin can be inserted into the lock hole on the steel wire rope fixing seat of the door body, thereby realizing locking, preventing the door body from falling after the steel wire rope is broken, greatly improving the safety, and the driving device of the hydraulic lifting watertight door is provided with 2 steel wire ropes, namely, a first steel wire rope and a second steel wire rope, wherein the lifting is mainly carried out through the first steel wire rope, and when the first steel wire rope breaks, the second steel wire rope can play a role in protection, can also be temporarily used for opening and closing the door body, and greatly improving the safety.
Drawings
FIG. 1 is a schematic view of a hydraulic lift watertight door;
fig. 2 is a front view of the drive device;
FIG. 3 is a top view of the drive apparatus;
fig. 4 is a schematic structural view of the safety device.
In the figure:
101. a door frame; 102. a door body; 103. a driving device; 104. a safety device;
1. A support; 2. a first wire rope joint; 3. a second wire rope joint; 4. a hydraulic cylinder; 5. an oil cylinder seat; 6. a movable seat; 7. a first pulley a; 8. a first pulley b; 9. a second pulley a; 10. a second pulley b; 11. a slide rail; 12. a first wire rope; 13. a second wire rope; 14. the first steel wire rope fixing seat; 15. a first base; 16. a second base; 17. the second steel wire rope fixing seat; 18. a safety pin; 19. a mounting base; 20. a driving oil cylinder; 21. a connecting rod; 22. a first transmission rod; 23. a second transmission rod; 24. a limit seat plate; 25. and a limit rod.
Detailed Description
The technical scheme of the invention is further described below by the specific embodiments with reference to the accompanying drawings. It is to be understood that the embodiments described herein are merely illustrative of the invention and are not limiting thereof.
Referring to fig. 1 to 4, fig. 1 is a schematic structural view of a hydraulic lifting watertight door; fig. 2 is a front view of the drive device; FIG. 3 is a top view of the drive apparatus; fig. 4 is a schematic structural view of the safety device.
In this embodiment, a hydraulic lifting watertight door includes a door frame 101 and a door body 102, where the door body 102 is capable of moving up and down and is disposed in the door frame 101, a safety device for improving safety is installed at an upper end of the door frame 101, and a driving device 103 for driving the door body 102 to move up and down is installed above the door frame 101;
The driving device 103 comprises a support 1, a first steel wire rope fixing seat 14, a first pulley block, a second pulley block, a first pulley group, a second pulley group, a first steel wire rope 12, a second steel wire rope 13, a first steel wire rope connector 2, a second steel wire rope connector 3 and a hydraulic cylinder 4, wherein the hydraulic cylinder 4 is fixedly arranged on the cylinder seat 5, the hydraulic cylinder 4 is horizontally arranged, the cylinder seat 5 is fixed on the support 1, the extending and retracting direction of a piston rod of the hydraulic cylinder 4 is defined as a first direction, a movable seat 6 is arranged on the support 1, the movable seat 6 can move along the first direction, the movable seat 6 is connected with the end head of the piston rod of the hydraulic cylinder 4, the first pulley block comprises a first pulley a7 and a first pulley b8 which are arranged at intervals side by side along the first direction, the first pulley a7 is arranged on the movable seat 6, the first pulley b8 is mounted at one end of the support 1 in the first direction, the first wire rope joint 2 is located below the first pulley b8, the second pulley block comprises a second pulley a7 and a second pulley b8 which are arranged side by side at intervals along the first direction, the second pulley a9 is mounted on the movable seat 6, the second pulley b10 is mounted at the other end of the support 1 in the first direction, the second wire rope joint 3 is located below the second pulley b10, one end of the first wire rope 12 is fixed on the first wire rope joint 2, the other end of the first wire rope 12 is connected with the second wire rope fixing seat 17 after passing through the first pulley block and the first pulley group, one end of the second wire rope 13 is fixed on the second wire rope joint 3, and the other end of the second wire rope 13 is passed through the second pulley block, the other end of the second wire rope 13 is fixed on the second pulley block, the second guide wheel group is connected with a second steel wire rope fixing seat 17, and the first steel wire rope fixing seat 14 is fixed on a door body 102 of the hydraulic lifting watertight door;
The safety device 104 comprises a first base 15, a second base 16, a safety pin 18 horizontally arranged and a driving assembly for driving the safety pin 18 to horizontally move, wherein the first base 15 is fixed on a mounting seat 19, the second base 16 is fixed on the mounting seat 19, the first base 15 and the second base 16 are arranged at intervals, a containing space is formed between the first base 15 and the second base 16, a first pin hole matched with the safety pin 18 is formed in the first base 15 along the first direction, a second pin hole matched with the safety pin 18 is formed in the second base 16 along the first direction, the second pin hole is correspondingly arranged with the first pin hole, and a lock hole matched with the safety pin 18 is formed in the first wire rope fixing seat 14 along the first direction; in the locking state, the first pin hole, the lock hole and the second pin hole are on a straight line, and the safety pin 18 is driven by the driving assembly to move along the first direction and sequentially pass through the first pin hole, the lock hole and the second pin hole so as to realize locking.
Specifically, in this embodiment, a direction perpendicular to the first direction in the same plane is defined as a second direction, the number of first pulleys a7 is 2, the number of first pulleys b8 is 2, the 2 first pulleys a7 are arranged side by side along the second direction, and the 2 first pulleys b8 are arranged side by side along the second direction; the number of the second pulleys a9 is 2, the number of the second pulleys b10 is 2, the 2 second pulleys a9 are arranged side by side along the second direction, and the 2 second pulleys b10 are arranged side by side along the second direction.
Specifically, in this embodiment, the diameter of the first steel wire rope 12 is larger than the diameter of the second steel wire rope 13, the first steel wire rope 12 is mainly used in the lifting process, and the second steel wire rope 13 is a spare steel wire rope, so that the effect of improving safety can be achieved.
In order to ensure smooth movement of the movable seat 6, in this embodiment, a sliding rail 11 is disposed on the support 1 along the first direction, and a slider matched with the sliding rail 11 is mounted at the lower end of the movable seat 6.
Specifically, in this embodiment, the driving assembly includes a driving cylinder 20, a connecting rod 21, and a driving member, where the driving cylinder 20 is mounted on the support 1, the driving member is in an L-shaped structure, and includes a first driving rod 22 and a second driving rod 23, one end of the first driving rod 22 is connected with one end of the second driving rod 23, a hinge hole is formed at a connection position of the driving member on the first driving rod 22 and the second driving rod 23, the driving member is hinged on the mounting seat 19, the connecting rod 21 is arranged along a vertical direction, the connecting rod 21 is formed by connecting a plurality of sections of vertical rods, a piston rod of the driving cylinder 20 extends downwards and is fixedly connected with an upper end of the connecting rod 21, a first long hole is formed at an end of the other end of the first driving rod 22 along an arrangement direction of the first driving rod 22, the other end of the first driving rod 22 is connected with a lower end of the second driving rod 21 through a first pin, a second end of the other end of the second driving rod 23 is arranged along a second pin shaft 23, and the second end of the second driving rod is connected with the second long pin 18 through a second pin.
In order to ensure that the first pin hole, the lock hole and the second pin hole are on a straight line after the hydraulic lifting watertight door is opened in place, in this embodiment, two ends of the second steel wire rope fixing seat 17 are provided with limit seat plates 19, and the first base 15 and the second base 16 are respectively provided with a limit rod 25 matched with the limit seat plates 24.
For the convenience of manufacturing, in this embodiment, the first transmission rod 22 and the second transmission rod 23 are integrally formed.
According to the hydraulic lifting watertight door, the safety device 104 is additionally arranged, and then when the hydraulic lifting watertight door is opened, the safety pin 18 can be inserted into the lock hole on the first steel wire rope fixing seat 14 of the door body 102, so that locking is achieved, the door body 102 is prevented from falling after the steel wire rope is broken, the safety is greatly improved, 2 steel wire ropes are arranged in the driving device 103 of the hydraulic lifting watertight door, the first steel wire rope 12 and the second steel wire rope 13 are mainly used for lifting, when the first steel wire rope 12 breaks, the second steel wire rope 13 can play a protective role, can also be temporarily used for opening and closing the door body 102, and the safety is greatly improved.
The above embodiments merely illustrate the basic principles and features of the present invention, and the present invention is not limited to the above embodiments, but can be variously changed and modified without departing from the spirit and scope of the present invention, which is within the scope of the present invention as claimed. The scope of the invention is defined by the appended claims.
Claims (8)
1. The utility model provides a hydraulic pressure promotes watertight door, includes door frame and door body, its characterized in that: the door body can move up and down and is arranged in the door frame, a safety device for improving safety is arranged at the upper end of the door frame, and a driving device for driving the door body to move up and down is arranged above the door frame;
The driving device comprises a support, a first steel wire rope fixing seat, a first pulley block, a second pulley block, a first guide pulley group, a second guide pulley group, a first steel wire rope, a second steel wire rope, a first steel wire rope connector, a second steel wire rope connector and a hydraulic oil cylinder, wherein the hydraulic oil cylinder is fixedly arranged on the oil cylinder seat, the hydraulic oil cylinder is horizontally arranged, the oil cylinder seat is fixed on the support, the extension direction of a piston rod of the hydraulic oil cylinder is defined to be a first direction, the support is provided with a movable seat, the movable seat can move along the first direction, the movable seat is connected with the end of the piston rod of the hydraulic oil cylinder, the first pulley block comprises first pulleys a and first pulleys b which are arranged side by side at intervals along the first direction, the first pulleys a are arranged on the movable seat, the first pulleys b are arranged at one end of the support in the first direction, the first steel wire rope connector is positioned below the first pulleys b, the second pulleys a second pulley b are arranged side by side at intervals along the first direction, the second pulleys b are arranged at the second end of the first pulleys side by side, the second pulleys b are arranged at the second pulley connector is arranged at the second end of the first pulley seat, the second pulleys are connected with the other end of the first pulley block in the first pulley seat in the first direction, the first pulley block is connected with the first pulley block at the other end of the first pulley seat, the first pulley block is connected with the first pulley block, the first steel wire rope fixing seat is fixed on a door body of the hydraulic lifting watertight door;
The safety device comprises a first base, a second base, a safety pin horizontally arranged and a driving assembly for driving the safety pin to horizontally move, wherein the first base is fixed on a mounting seat, the second base is fixed on the mounting seat, the first base and the second base are arranged at intervals, a containing space is formed between the first base and the second base, a first pin hole matched with the safety pin is formed in the first base along the first direction, a second pin hole matched with the safety pin is formed in the second base along the first direction, the second pin hole is correspondingly arranged with the first pin hole, and a lock hole matched with the safety pin is formed in the first wire rope fixing seat along the first direction; under the locking state, first pinhole, lockhole, second pinhole are on a straight line, and the relief pin removes and passes first pinhole, lockhole, second pinhole in proper order along first direction under drive assembly's drive to realize locking.
2. A hydraulically lifted watertight door as claimed in claim 1, wherein: defining a direction perpendicular to the first direction in the same plane as a second direction, wherein the number of the first pulleys a is multiple, the number of the first pulleys b is multiple, the number of the first pulleys a is the same as the number of the first pulleys b, the first pulleys a are arranged side by side along the second direction, and the first pulleys b are arranged side by side along the second direction; the number of the second pulleys a is the same as the number of the second pulleys b, the second pulleys a are arranged side by side along the second direction, and the second pulleys b are arranged side by side along the second direction.
3. A hydraulically lifted watertight door as claimed in claim 2, wherein: the number of the first pulleys a is 2, and the number of the corresponding first pulleys b is 2; the number of the second pulleys a is 2, and the number of the second pulleys b is 2 correspondingly.
4. A hydraulically lifted watertight door as claimed in claim 3, wherein: the diameter of the first steel wire rope is larger than that of the second steel wire rope.
5. A hydraulically lifted watertight door as claimed in claim 4, wherein: the sliding rail is arranged on the support along the first direction, and the sliding block matched with the sliding rail is arranged at the lower end of the movable seat.
6. A hydraulically lifted watertight door as claimed in any one of claims 1 to 5, wherein: the driving assembly comprises a driving oil cylinder, a connecting rod and a driving part, wherein the driving part is of an L-shaped structure and comprises a first driving rod and a second driving rod, one end of the first driving rod is connected with one end of the second driving rod, the driving part is positioned on the first driving rod, a hinge hole is formed in the joint of the second driving rod, the driving part is hinged to the mounting seat, the connecting rod is arranged in the vertical direction, a piston rod of the driving oil cylinder extends downwards and is fixedly connected with the upper end of the connecting rod, the other end of the first driving rod is provided with a first long hole in the arrangement direction of the first driving rod, the other end of the first driving rod is connected with the lower end of the connecting rod through a first pin shaft, the other end of the second driving rod is provided with a second long hole in the arrangement direction of the second driving rod, and the other end of the second driving rod is connected with one end of the safety pin through a second pin shaft.
7. A hydraulically lifted watertight door as claimed in claim 6, wherein: and limiting seat plates are arranged at two ends of the second steel wire rope fixing seat, and limiting rods matched with the limiting seat plates are arranged on the first base and the second base.
8. A hydraulically lifted watertight door as claimed in claim 7, wherein: the first transmission rod and the second transmission rod are of an integrated structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010249922.1A CN111305163B (en) | 2020-04-01 | 2020-04-01 | Hydraulic lifting watertight door |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010249922.1A CN111305163B (en) | 2020-04-01 | 2020-04-01 | Hydraulic lifting watertight door |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111305163A CN111305163A (en) | 2020-06-19 |
| CN111305163B true CN111305163B (en) | 2024-08-06 |
Family
ID=71146113
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010249922.1A Active CN111305163B (en) | 2020-04-01 | 2020-04-01 | Hydraulic lifting watertight door |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111305163B (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN212077840U (en) * | 2020-04-01 | 2020-12-04 | 无锡市海联舰船内装有限公司 | Hydraulic lifting watertight door |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2143533B1 (en) * | 1971-06-28 | 1974-03-08 | Subsea Equipment Ass Ltd | |
| CN101934991B (en) * | 2010-08-24 | 2013-01-16 | 北京市三一重机有限公司 | Lifting mechanism and rotary drilling rig |
| CN103758088B (en) * | 2014-01-15 | 2017-01-04 | 中国长江三峡集团公司 | A kind of ultra-large type hydraulic steel gate hydraulic control steel strand wires headstock gear |
| CN205662905U (en) * | 2016-06-07 | 2016-10-26 | 三峡大学 | Foldable gate that level was opened and close |
| CN207017851U (en) * | 2017-07-04 | 2018-02-16 | 武健 | Electric up-down door switch unit |
| CN107500167A (en) * | 2017-08-17 | 2017-12-22 | 上海振华重工(集团)股份有限公司 | A kind of horizontal lying-type Hydranlic tensioner |
| CN209761197U (en) * | 2019-01-16 | 2019-12-10 | 衡水奇佳停车设备有限公司 | steel wire rope lifting automatic door |
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2020
- 2020-04-01 CN CN202010249922.1A patent/CN111305163B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN212077840U (en) * | 2020-04-01 | 2020-12-04 | 无锡市海联舰船内装有限公司 | Hydraulic lifting watertight door |
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| CN111305163A (en) | 2020-06-19 |
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