CN113602972A - Arm head of hoisting equipment and offshore crane - Google Patents
Arm head of hoisting equipment and offshore crane Download PDFInfo
- Publication number
- CN113602972A CN113602972A CN202110754629.5A CN202110754629A CN113602972A CN 113602972 A CN113602972 A CN 113602972A CN 202110754629 A CN202110754629 A CN 202110754629A CN 113602972 A CN113602972 A CN 113602972A
- Authority
- CN
- China
- Prior art keywords
- lifting rope
- guide
- triggering
- arm head
- trigger
- 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
- 238000004804 winding Methods 0.000 claims abstract description 36
- 230000001960 triggered effect Effects 0.000 claims abstract description 15
- 238000000034 method Methods 0.000 claims abstract description 13
- 230000008569 process Effects 0.000 claims abstract description 12
- 230000001681 protective effect Effects 0.000 claims description 5
- 230000000694 effects Effects 0.000 description 5
- 230000001939 inductive effect Effects 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 3
- 230000002411 adverse Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 241000287828 Gallus gallus Species 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000001174 ascending effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000005672 electromagnetic field Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C13/00—Other constructional features or details
- B66C13/18—Control systems or devices
- B66C13/50—Applications of limit circuits or of limit-switch arrangements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C1/00—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles
- B66C1/68—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles mounted on, or guided by, jibs
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
- B66C23/62—Constructional features or details
- B66C23/64—Jibs
- B66C23/66—Outer or upper end constructions
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Automation & Control Theory (AREA)
- Load-Engaging Elements For Cranes (AREA)
Abstract
The invention discloses an arm head of hoisting equipment and an offshore crane, wherein the hoisting equipment comprises a crane arm, a lifting rope and a lifting rope winding and unwinding device, and the arm head comprises: the first guide piece is arranged on the crane boom and is provided with a first accommodating cavity with an opening at the bottom; the second guide piece is connected to the lifting rope and extends into the first accommodating cavity from the bottom opening of the first guide piece; the trigger device is connected with the lifting rope winding and unwinding device and comprises a first trigger piece and a second trigger piece which are arranged at different height positions of the first guide piece; in the process that the second guide piece moves towards the first guide piece, the first trigger piece and the second trigger piece are sequentially triggered by the second guide piece to switch the working state of the lifting rope winding and unwinding device. The trigger device of the arm head has double limiting functions, solves the problem of impact on the lifting rope caused by sudden stop after the trigger device triggers the upper limiting, and can normally retract the hook even if the lifting rope swings.
Description
Technical Field
The invention relates to the technical field of hoisting equipment, in particular to an arm head of hoisting equipment and an offshore crane.
Background
The arm head is an important component in small lifting equipment. The hoisting equipment comprises a lifting hook, a lifting rope for lifting the lifting hook and a lifting rope winding and unwinding device for winding and unwinding the lifting rope, wherein the lifting rope passes through an arm head in the winding and unwinding process.
When the lifting rope is retracted, the lifting hook needs to be lifted to the position of the arm head. In the prior art, when a lifting rope reaches a specified rope collecting position, the lifting rope collecting and releasing device stops working immediately, the impact on the lifting rope is large, and the service life of the lifting rope is influenced.
Disclosure of Invention
Therefore, the technical problem to be solved by the invention is to overcome the defect that the boom head easily impacts a lifting rope when the lifting rope is collected in the prior art, so that the boom head of the hoisting equipment and the offshore platform are provided.
In order to solve the technical problems, the technical scheme of the invention is as follows:
an arm head for a lifting apparatus, the lifting apparatus comprising a lifting rope reel, the arm head comprising:
the first guide piece is arranged on the crane boom and is provided with a first accommodating cavity with an opening at the bottom;
the second guide piece is connected to the lifting rope, surrounds the periphery of the lifting rope, and extends into the first accommodating cavity from the bottom opening;
and the triggering device is connected with the lifting rope winding and unwinding device and comprises a first triggering part and a second triggering part which are arranged at different height positions of the first guiding part.
Furthermore, the lifting rope winding and unwinding device at least has a first working state for driving the lifting rope to do uniform motion, a second working state for driving the lifting rope to do deceleration motion and a third working state for stopping driving the lifting rope to do motion in the rope winding process; in the process that the second guide piece moves towards the first guide piece, the first trigger piece and the second trigger piece are sequentially triggered by the second guide piece to switch the working state of the lifting rope winding and unwinding device; when the second guide piece triggers the second trigger piece, the lifting rope winding and unwinding device is switched from the first working state to the second working state, and when the second guide piece triggers the second trigger piece, the lifting rope winding and unwinding device is switched from the second working state to the third working state.
Further, the first trigger piece and the second trigger piece are both travel switches arranged on the first guide piece.
Further, the triggering ends of the first triggering member and the second triggering member extend from the side wall of the first guiding member into the interior of the first accommodating cavity.
Furthermore, the number of the first triggering parts is at least two along the circumferential direction of the first guiding part, or the number of the triggering ends arranged along the circumferential direction of the first guiding part is at least two on the first triggering part.
Further, the second trigger member is fixed to the first guide member by a support member.
Furthermore, the first accommodating cavity is a conical cavity with a large caliber at the bottom and a small caliber at the top; the second guide part is a cone with a small outer diameter at the top and a large outer diameter at the bottom.
Furthermore, a protective cover covering the periphery of the first guide piece is fixed on the outer side of the first guide piece.
Furthermore, the first guide piece and the protective cover form a containing space with an open top, and a drain hole for draining moisture in the containing space outwards is formed at the bottom of the first guide piece.
In another aspect, the invention further provides an offshore platform comprising the arm head of the hoisting equipment.
The technical scheme of the invention has the following advantages:
1. according to the arm head of the hoisting equipment, in the process of retracting the lifting rope, the lifting rope retracting mechanism extends the second guide piece connected to the lifting rope into the first guide piece from the bottom opening of the first guide piece along with the movement of the lifting rope until the second guide piece abuts against the top wall of the first guide piece, and when the second guide piece moves to the height position of the first trigger piece, the first trigger piece is triggered, and the lifting rope retracting device decelerates; when the second guide piece moves to the height position of the second trigger piece, the second trigger piece is triggered, and the lifting rope winding and unwinding device stops immediately; the trigger device of the arm head has double limiting functions, and solves the problem of impact on the lifting rope caused by sudden stop after the upper limit is triggered by a single trigger device.
2. According to the arm head of the hoisting equipment, the first trigger piece is provided with at least two trigger ends arranged on the side wall of the first guide piece along the circumferential direction of the first guide piece, or the first trigger piece is provided with at least two trigger ends arranged on the side wall of the first guide piece along the circumferential direction of the first guide piece, even if the lifting rope swings in the winding and unwinding process, the two first trigger pieces or the two trigger ends arranged along the circumferential direction of the first guide piece can be triggered by the second guide piece, and even if the lifting rope swings, normal hook winding can be realized.
3. According to the arm head of the hoisting equipment, the first accommodating cavity in the first guide part is a conical cavity with a diameter being larger at the lower part and smaller at the upper part, the second guide part is a cone with an outer diameter being smaller at the upper part and larger at the lower part, the first guide part can play a role of motion guide on the second guide part, the second guide part can conveniently extend into the first guide part, and then the trigger devices on the first guide part can be stably and sequentially triggered.
4. According to the arm head of the hoisting equipment, the protective cover plays a role in fixing and protecting the first guide piece, and the drain hole can be used for enabling accumulated water in the containing space formed by the first guide piece and the protective cover to flow outwards, so that adverse effects of moisture on the trigger device are prevented.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic half-sectional structure view of an arm head of a lifting device according to an embodiment of the present invention;
FIG. 2 is a schematic view of a half-section of a first guide member according to an embodiment of the present invention;
fig. 3 is a schematic half-sectional view of a first guide member according to an embodiment of the present invention.
Description of reference numerals: 1. a lifting rope; 2. a first guide member; 21. a drain hole; 3. a second guide member; 41. a first trigger; 42. a second trigger; 5. a support plate; 6. a balancing weight; 7. a chicken heart ring; 8. a hook; 9. a shield.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example one
The arm head of a lifting apparatus shown in fig. 1 to 3 includes a lifting arm (not shown), a lifting rope 1 wound around the lifting arm, and a lifting rope winding and unwinding device (not shown) for winding and unwinding the lifting rope 1, and is located at an end portion of the lifting arm or connected to the lifting arm. In this embodiment, the lifting rope 1 is a steel wire rope, and the lifting rope winding and unwinding device may be a winch. The lifting rope 1 is connected with a balancing weight 6, and the balancing weight 6 is connected with a lifting hook 8. The lifting rope comprises a lifting rope 1, a heart ring 7 is fixedly connected with one end of a balancing weight 6 in a compression joint mode, the heart ring 7 is hung on a lifting lug above the balancing weight 6, and a lifting hook 8 is fixed on the lifting lug below the balancing weight 6 through a bolt. The lifting rope winding and unwinding device has a first working state for driving the lifting rope 1 to do uniform motion, a second working state for driving the lifting rope 1 to do deceleration motion and a third working state for stopping driving the lifting rope 1 to move in the rope winding process.
The structure of the arm head is shown in fig. 1, and the arm head comprises a first guide part 2 arranged on the crane arm, a second guide part 3 connected to the lifting rope 1, and a trigger device arranged on the first guide part 2 and connected with the lifting rope winding and unwinding device. Specifically, the trigger device is electrically connected with the lifting rope winding and unwinding device, and when the trigger device is triggered, the trigger device sends a control signal to the lifting rope winding and unwinding device through the connecting lead.
In particular, the first guide 2 can be in particular a part on the jib or as a component fixedly mounted on the jib. The inside of first guide 2 is equipped with first chamber that holds, and first chamber that holds has the bottom opening, and the top of first guide 2 is equipped with the open-top that supplies lifting rope 1 to stretch into first chamber that holds.
Specifically, second guide 3 passes through bolt fixed connection and just centers on the periphery at lifting rope 1 in balancing weight 6 top, and when lifting rope 1 was receive and release to lifting rope winding and unwinding devices, second guide 3 and lifting rope 1 synchronous motion, can stretch into in the first chamber that holds from the bottom opening in the 3 motion processes of second guide until offsetting with the roof of first guide 2, lifting rope 1 stop motion completely.
Specifically, the triggering device includes a first triggering member 41 and a second triggering member 42, and the first triggering member 41 and the second triggering member 42 are disposed at different height positions of the first guide member 2. The second triggering member 42 is closer to the top wall of the first guide member 2 than the first triggering member 41.
In the rope winding process of the lifting rope 1: when the second guide member 3 touches the first trigger member 41, the lifting rope winding and unwinding device is switched from the first working state to the second working state, the lifting rope winding and unwinding device controls the lifting rope 1 to do deceleration and ascending movement, when the second guide member 3 touches the second trigger member 42, the lifting rope winding and unwinding device is switched from the second working state to the third working state, and the lifting rope winding and unwinding device controls the lifting rope 1 to stop moving. In the arm head of the hoisting equipment, the triggering device comprises the first triggering part 41 and the second triggering part 42 which are positioned at different height positions of the first guiding part 2, so that the triggering device has a double limiting function, and the problem of impact on the lifting rope 1 caused by sudden stop after the single triggering device triggers the upper limiting part is solved.
In this embodiment, the first accommodating cavity in the first guide 2 is a tapered cavity with a larger aperture at the bottom, the second guide 3 is a taper with a smaller outer diameter at the top, and the shape of the second guide 3 is the same as the shape of the first accommodating cavity. The first guide 2 is also embodied as a cone with a smaller outer diameter at the top and a larger outer diameter at the bottom. The first guide member 2 includes a straight cylinder section located above and a conical section located below, the first trigger member 41 is installed under the straight cylinder section at a high-low position close to the conical section, and the second trigger member 42 is installed at the straight cylinder section at a position close to the top wall of the first guide member 2. The first trigger 41 is triggered when the second guide 3 has just entered the straight section of the first guide 2 from the tapered section of the first guide 2.
In this embodiment, a supporting member for supporting the second triggering member 42 is further fixed on the outer wall of the first guiding member 2, and the supporting member may be specifically a supporting plate 5. The support plate 5 can ensure the stability of the mounting structure of the second triggering member 42, and prevent the second triggering member 42 from retracting under the action of the second guiding member 3.
In the present embodiment, the first trigger member 41 and the second trigger member 42 are both mechanical trigger members, such as travel switches provided on the first guide member 2. The mechanical triggering mode has the advantages of high triggering stability and low possibility of being influenced by external environment, and can be reliably applied to hoisting equipment of an offshore platform. In an alternative embodiment, the first trigger member 41 and the second trigger member 42 may also be triggered in a non-contact manner, such as an inductive triggering manner, which includes, but is not limited to, a laser inductive triggering manner, an electromagnetic field effect inductive triggering manner, and the like.
In the present embodiment, the first triggering member 41 and the second triggering member 42 are both mounted on the side wall of the first guiding member 2, the first triggering member 41 has a first triggering end extending from the side wall of the first guiding member 2 into the interior of the first accommodating chamber, and the second triggering member 42 has a second triggering end extending from the side wall of the first guiding member 2 into the interior of the first accommodating chamber. First trigger end and second trigger end are the elastic construction that has elasticity and kick-back the function, and when first trigger end and second trigger end took place the contact with second guide 3, first trigger end and second trigger end elasticity shrink and send control command to lifting rope coiling and uncoiling device.
In this embodiment, there are two first triggering members 41, two first triggering members 41 are symmetrically disposed on the peripheral wall of the first guiding member 2, and any one of the two first triggering members 41 can send a control command to the lifting rope retracting device when being triggered. It will be appreciated that the number of first trigger members 41 may also be three or more, and that any one of the three or more first trigger members 41 may be triggered to issue a control command to the hoist rope retracting device. In an alternative embodiment, the first triggering member 41 may be a ring-shaped structure disposed on the peripheral wall of the first guiding member 2, two first triggering ends are disposed on the first triggering member 41 of the ring-shaped structure, the first triggering ends are symmetrically disposed along the peripheral wall of the first guiding member 2, and any one of the two first triggering ends can send a control command to the sling retracting device when being triggered. With the arrangement, even if the lifting rope 1 swings in the rope winding process, at least one of the two first triggering parts 41 or the two first triggering ends arranged along the circumferential direction of the first guide part 2 is touched by the second guide part 3, and normal hook winding can be realized even if the lifting rope 1 swings.
In the present embodiment, a hood 9 covering the outer periphery of the first guide 2 is fixed to the outside of the first guide 2. The first guide member 2 and the protection cover 9 form a receiving space having an open top, and a drain hole 21 for discharging moisture in the receiving space is formed at the bottom of the first guide member 2. Protection casing 9 plays the effect of fixing and protection to first guide 2, and wash port 21 can supply the ponding in the storage space that first guide 2 and protection casing 9 formed to outwards flow out, prevents the adverse effect that moisture caused trigger device.
The second embodiment of the invention further provides an offshore crane, which comprises the arm head of the hoisting equipment in the first embodiment.
In summary, in the arm head of the hoisting equipment and the offshore crane provided by the embodiment of the present invention, the triggering device includes the first triggering part 41 and the second triggering part 42 located at different height positions of the first guiding part 2, so that the triggering device has a dual limiting function, and the problem of impact on the lifting rope 1 caused by sudden stop after the upper limiting is triggered by the existing single triggering device is solved; and first guide 2 plays the effect of direction to the motion of second guide 3, even the lifting rope 1 swing also can realize normally receiving the hook, has overcome the swing problem of receipts rope in-process.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.
Claims (10)
1. An arm head of hoisting equipment, the hoisting equipment comprises a lifting rope winding and unwinding device, and is characterized in that the arm head comprises:
the first guide piece (2) is arranged on the crane boom and is provided with a first accommodating cavity with an opening at the bottom;
the second guide piece (3) is connected to the lifting rope (1), surrounds the periphery of the lifting rope (1), and extends into the first accommodating cavity from the bottom opening;
the triggering device is connected with the lifting rope winding and unwinding device and comprises a first triggering part (41) and a second triggering part (42) which are arranged on different height positions of the first guide part (2).
2. The arm head of the hoisting equipment according to claim 1, wherein the lifting rope retracting device at least has a first working state for driving the lifting rope (1) to move at a constant speed, a second working state for driving the lifting rope (1) to move at a reduced speed, and a third working state for stopping driving the lifting rope (1) to move in the rope retracting process; in the process that the second guide piece (3) moves towards the first guide piece (2), the first trigger piece (41) and the second trigger piece (42) are sequentially triggered by the second guide piece (3) to switch the working state of the lifting rope winding and unwinding device; when the second guide piece (3) triggers the first trigger piece (41), the lifting rope winding and unwinding device is switched from the first working state to the second working state, and when the second guide piece (3) triggers the second trigger piece (42), the lifting rope winding and unwinding device is switched from the second working state to the third working state.
3. The boom head of a hoisting device according to claim 1, characterized in that the first triggering member (41) and the second triggering member (42) are both travel switches provided on the first guide member (2).
4. The arm head of a lifting device according to claim 1, characterized in that the triggering ends of the first triggering member (41) and the second triggering member (42) project from the side wall of the first guide member (2) into the interior of the first receiving chamber.
5. The arm head of a hoisting device according to claim 1, characterized in that the first triggering member (41) is provided with at least two triggering ends on the side wall of the first guiding member (2) in the circumferential direction of the first guiding member (2), or that the first triggering member (41) is provided with at least two triggering ends provided in the circumferential direction of the first guiding member (2).
6. The arm head of a lifting device according to claim 1, characterized in that the second triggering member (42) is fixed to the first guiding member (2) by means of a support.
7. The arm head of the hoisting device as claimed in claim 1, wherein the first receiving cavity is a tapered cavity with a larger aperture at the bottom and a smaller aperture at the top; the second guide piece (3) is a cone with a small outer diameter at the top and a large outer diameter at the bottom.
8. The arm head of a lifting device as claimed in claim 1, characterized in that a protective cover (9) covering the outer circumference of the first guide part (2) is fastened to the outside of the first guide part (2).
9. The arm head of a lifting apparatus according to claim 8, wherein the first guide (2) and the shield (9) are formed with a receiving space having an open top, and a drain hole (21) is provided at a bottom of the first guide (2).
10. An offshore crane, characterized in that it comprises the arm head of a hoisting device according to any one of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110754629.5A CN113602972B (en) | 2021-07-02 | 2021-07-02 | Arm head of hoisting equipment and offshore crane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110754629.5A CN113602972B (en) | 2021-07-02 | 2021-07-02 | Arm head of hoisting equipment and offshore crane |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113602972A true CN113602972A (en) | 2021-11-05 |
| CN113602972B CN113602972B (en) | 2024-06-04 |
Family
ID=78303993
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110754629.5A Active CN113602972B (en) | 2021-07-02 | 2021-07-02 | Arm head of hoisting equipment and offshore crane |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113602972B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60106796A (en) * | 1983-11-14 | 1985-06-12 | 株式会社加藤製作所 | Overhang and containing device for jib |
| JPH09194192A (en) * | 1996-01-19 | 1997-07-29 | Kato Works Co Ltd | Hook body fixing structure |
| JPH11255484A (en) * | 1998-03-12 | 1999-09-21 | Chuhatsu Hanbai Kk | Over-hoisting limit for crane |
| CN102295238A (en) * | 2011-08-05 | 2011-12-28 | 长沙中联重工科技发展股份有限公司 | Limited heavy hammer for crane anti-overwinding switch |
| CN206940141U (en) * | 2017-03-16 | 2018-01-30 | 中际联合（天津）科技有限公司 | A kind of lower end stopping means of chain elevator |
| CN108883917A (en) * | 2016-01-29 | 2018-11-23 | 吉宝岸外与海事美国股份有限公司 | Anti- two pulley blocks contact sensing device and method |
-
2021
- 2021-07-02 CN CN202110754629.5A patent/CN113602972B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60106796A (en) * | 1983-11-14 | 1985-06-12 | 株式会社加藤製作所 | Overhang and containing device for jib |
| JPH09194192A (en) * | 1996-01-19 | 1997-07-29 | Kato Works Co Ltd | Hook body fixing structure |
| JPH11255484A (en) * | 1998-03-12 | 1999-09-21 | Chuhatsu Hanbai Kk | Over-hoisting limit for crane |
| CN102295238A (en) * | 2011-08-05 | 2011-12-28 | 长沙中联重工科技发展股份有限公司 | Limited heavy hammer for crane anti-overwinding switch |
| CN108883917A (en) * | 2016-01-29 | 2018-11-23 | 吉宝岸外与海事美国股份有限公司 | Anti- two pulley blocks contact sensing device and method |
| CN206940141U (en) * | 2017-03-16 | 2018-01-30 | 中际联合（天津）科技有限公司 | A kind of lower end stopping means of chain elevator |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113602972B (en) | 2024-06-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8528755B2 (en) | Mobile crane having counterweight | |
| EP3153396B1 (en) | A main boom and a knuckle boom | |
| US8657134B2 (en) | Hoisting limit switch and lifting device | |
| US20200361751A1 (en) | Method for raising and/or lowering a load-handling element of a lifting device, in particular of a crane, an dlifting device therefor | |
| US5263660A (en) | Anti-two block device | |
| CN113602972A (en) | Arm head of hoisting equipment and offshore crane | |
| KR102063608B1 (en) | A Crane Having Telescoping Device | |
| EP2015313B1 (en) | Reactor servicing platform | |
| EP2205517B1 (en) | Method for controlling a hoisting or paying out movement and hoisting frame having tiltable cable shreave for use therein | |
| KR101930750B1 (en) | Apparatus and method for crane inspection | |
| CN216549281U (en) | Auxiliary cable feeding basket device for vertical cable of container crane sling | |
| KR100953796B1 (en) | Overwinding prevention device of crane | |
| CN210682962U (en) | Hook anti-unhooking device on crane | |
| CN221027159U (en) | Height limiter device with automatic wire hiding function | |
| JP2003171089A (en) | Electric winding up machine | |
| CN217838144U (en) | Tower crane lifting device | |
| JP2007176627A (en) | Elevator | |
| CN118479346A (en) | Lifting hook component and offshore platform crane | |
| CN102897670B (en) | Spring type safety limiting caution device for lifting rope of gantry crane | |
| CN214399618U (en) | Automatic rope climbing protector | |
| KR20130034172A (en) | Limit switch of crane | |
| JP3487193B2 (en) | Grab bucket landing detection device | |
| JP3237573U (en) | Crane overwinding prevention device | |
| CN216038246U (en) | Hook retracting device of pitching luffing crane of offshore platform | |
| JP2012250820A (en) | Safety control device related to jib attitude in crane with jib |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |