CN201634328U - Anti-dropping safety device for tower crane - Google Patents
Anti-dropping safety device for tower crane Download PDFInfo
- Publication number
- CN201634328U CN201634328U CN2009202382630U CN200920238263U CN201634328U CN 201634328 U CN201634328 U CN 201634328U CN 2009202382630 U CN2009202382630 U CN 2009202382630U CN 200920238263 U CN200920238263 U CN 200920238263U CN 201634328 U CN201634328 U CN 201634328U
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- tower crane
- speed
- tower
- safety device
- rope
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Abstract
The utility model discloses an anti-dropping safety device for a tower crane, comprising a speed measuring device and a rope clamping device, wherein the speed measuring device is used for measuring the linear speed of the lifting wire rope of the tower crane, is provided with a speed measuring mechanism and a speed-measurement triggering mechanism and is fixed on a tower crane body; and the rope clamping device is fixed on the tower crane body and is linked to the speed-measurement triggering mechanism. In the utility model, by adopting the structure, the speed measuring mechanism monitors the linear speed of the wire rope, and the triggering mechanism leads the rope clamping device to clamp the lifting wire rope and directly stops a heavy object falling at ultra-high speed, thus preventing accidents. The anti-dropping safety device has simple structure, convenience in installation, safety and reliability, and can be added to a field tower crane for use.
Description
Technical field
The utility model relates to a kind of direct safety guard of lifting mechanism of tower crane, more particularly, relates to a kind of tower crane anti-falling safety device.
Background technology
The most representative equipment of existing lifting means is elevator.The safety measure that realizes the overspeed protection of elevator fall arrest is: velocity limiter-safety tongs system that the drg and the direct brake action of indirect brake action are set in lift facility; promptly when elevator moves; if the misfunctioning of brake of lifting mechanism; velocity limiter in the safety tongs system measures elevator speed by governor rope; when hypervelocity takes place in elevator; be that the speed of car is when surpassing the safety speed operation; velocity limiter begins action; governor rope directly is stuck on the elevator orbit safety tongs by the safety tongs shift mechanism, makes elevator stopping.Therefore elevator is safest lifting means.
And the lifting mechanism of other elevator machinery such as tower crane is owing to be subjected to the restriction of usage condition, and the technical matters that adopts the safety tongs system to solve the lifting mechanism hypervelocity is the comparison difficulty, and therefore the lifting mechanism drg of indirectly-acting generally only has been set.And be widely used in the lifting mechanism of the tower crane of construction site, because operation in the open promotes silt and material, people from camp site, thing mix, security context is very abominable, in case play the lifting mechanism misfunctioning of brake of indirectly-acting, then the weight falling accident must take place.
At present, the lifting mechanism drg comprises centrifugal brake and the disc type additional brake (but these safety devices all belong to indirect brake equipment) that is installed in the transmission device that hoists, when the transmission device brake system that hoists goes wrong, can be with the transmission device stop.But above-mentioned additional brake exists weight, volume big, and the cost height is installed inconvenient shortcoming, and if the hoist rope follower bolt is loosening or accidents such as motor, drum shaft fracture, then above-mentioned safety device is also powerless to the weight falling accident.
From above-mentioned data, existing elevator machinery lifting mechanism is necessary to install the fender guard that a cover can prevent that directly the weight hypervelocity from falling additional to it at once, to improve its safety, reduces personal injury and property damage.
The utility model content
The purpose of this utility model is at the deficiencies in the prior art part; a kind of technical maturation, simple in structure, tower crane anti-falling safety device that applicability is strong are provided; to realize, prevent that the weight falling accident from taking place to the direct actv. overspeed protection of lifting mechanism of tower crane.
For achieving the above object, the utility model adopts following technical scheme: the tower crane anti-falling safety device, comprise linear velocity, have velocity measurement mechanisms and the speed measuring device of the trigger mechanism that tests the speed, be fixed on the body of the tower of tower crane in order to the hoist rope that measures tower crane; And rope gripper, being fixed on the body of the tower of tower crane, interlock is in the trigger mechanism that tests the speed.
As preferably, described velocity measurement mechanisms is a fifth wheel, and this fifth wheel directly is pressed on the hoist rope.
As preferably, the described trigger mechanism that tests the speed is by flexible axle and rope gripper interlock.
Select as another kind, described velocity measurement mechanisms is that rotary encoder can be installed on the pulley or fifth wheel of tower crane by the rotary encoder of PLC control, and the described trigger mechanism that tests the speed is the electromagnet by PLC control.
As preferably, described rope gripper comprise one with the uncoupling rigging of the trigger mechanism interlock that tests the speed.
As preferably, described rope gripper two wedge shape friction linings, in between two wedge shape friction linings, pass through at least one hoist rope, realize under the non-action situation hoist rope can freedom advance up and down and the action situation under utilize the wedge shape self-lock mechanism that hoist rope is clamped in the rope gripper.
As preferably, described speed measuring device has one to be used for hoist rope is clamped in contact roller on the fifth wheel.
As preferably, the described trigger mechanism that tests the speed comprises an electric safety switch with its interlock.
As preferably, described anti-falling safety device is fixed on the tower cap head sheave and the body of the tower between the crane arm deflection sheave of tower crane, or correspondingly has on the body of the tower of a linear portion hoist rope.
As preferably, described speed measuring device and rope gripper be by the transom structure that links into an integrated entity, or be installed separately on the body of the tower that is fixed on tower crane.
The utility model is owing to adopt said structure, by the linear velocity of velocity measurement mechanisms monitoring hoist rope, and makes the rope gripper action clamp hoist rope by trigger mechanism, the direct weight stop that hypervelocity is fallen, and the accident that prevents takes place.The utility model is simple in structure, and is easy for installation, safe and reliable, can be installed at place in operation on the on-the-spot tower crane immediately.
Description of drawings
Fig. 1 is the structural representation that tower crane of the present utility model is installed.
Fig. 2 is the A portion structure for amplifying scheme drawing of Fig. 1.
Fig. 3 is the side-looking structural representation of the utility model embodiment 1.
Fig. 4 is the left TV structure scheme drawing of Fig. 3.
Fig. 5 is that the hoist rope of the utility model embodiment 1 described tower crane and the position between the rope gripper concern scheme drawing.
Fig. 6 is the structural representation of the utility model embodiment 2.
Fig. 7 is that the utility model embodiment 2 described voussoirs, voussoir cover concern scheme drawing with the position of traction steel-cable.
Among the figure:
The 1-speed measuring device; The 11-fifth wheel; The 12-trigger mechanism that tests the speed; The 13-contact roller; The 2-rope gripper; The 21-voussoir; 22-voussoir cover; 3-interlock flexible axle; The 4-spring; The 5-hoist rope; The 6-bolt; 7-rigidity guide rod; The 8-clamp clip; The body of the tower of 9-tower crane; 91-tower cap head sheave; 92-crane arm deflection sheave.
Now the utility model is described in further detail in conjunction with the accompanying drawings and embodiments:
The specific embodiment
Extremely shown in Figure 5 as Fig. 1, tower crane anti-falling safety device described in the utility model, be mounted on the tower cap head sheave 91 and the body of the tower 9 between the crane arm deflection sheave 92 of tower crane, by have fifth wheel 11 and the speed measuring device 1 of the trigger mechanism 12 that tests the speed, rope gripper 2 be connected test the speed trigger mechanism and wire holder interlock flexible axle 3 between the two and form.Speed measuring device 1 and rope gripper are by transoms such as bolt, the nut structure that links into an integrated entity.
When the utility model is installed, the end of fifth wheel 11 directly is pressed on the hoist rope 5 of tower crane, thrust is adjusted by speed measuring device bolt of rear end plate 6.Hoist rope group 5 places two clamp clips 8 of wire holder.When tower crane normally moved, hoist rope 5 was advanced between two clamp clips 8 and is driven fifth wheel 11 with normal speed and rotates together.And when unusual overspeed situation takes place, hoist rope 5 drives fifth wheel 11 high speed rotating with the speed that exceeds safety requirements, make trigger mechanism 12 actions of testing the speed, when the trigger mechanism 12 that tests the speed makes and cuts off the lifting mechanism of tower crane working power with the electric safety switch of its interlock, spur the uncoupling rigging that places rope gripper 2 by interlock flexible axle 3 and make the spring 4 that places rope gripper 2 discharge drive two clamp clips 8, reach the purpose of fast direct stop hoist rope 5 clampings.
In the present embodiment, described rope gripper can adopt as Chinese patent ZL200510033247.4, the wire holder structure of being put down in writing in a kind of bidirection overspeed protective device of elevator, and this replaces for simple structure, is not described in detail at this.
As shown in Figure 6 and Figure 7, the difference of present embodiment and embodiment 1 is, described tower crane anti-falling safety device by have fifth wheel 11, speed measuring device 1, the rope gripper 2 of test the speed trigger mechanism 12 and contact roller 13 and being connected tests the speed trigger mechanism and rope gripper rigidity guide rod 7 is between the two formed.Contact roller 13 is clamped in the hoist rope 5 of tower crane on the fifth wheel 11.Rope gripper 2 is made up of voussoir 21 and voussoir with matching cover 22, and described voussoir 21 is close to the hoist rope 5 of tower crane and is slided in the voussoir cover 22, and rigidity guide rod 7 is connected with voussoir 21.
When unusual overspeed situation takes place in tower crane, hoist rope 5 drives fifth wheel 11 high speed rotating with the speed that exceeds safety requirements, make trigger mechanism 12 actions of testing the speed, test the speed trigger mechanism 12 by electric safety switch when cutting off the lifting mechanism of tower crane working power, promoting voussoir 21 by rigidity guide rod 7 slides, and after voussoir 21 is pushed, and the friction force between the hoist rope increases, this friction force can drive voussoir 21 and further slip in the voussoir cover 22, and friction force also increases thereupon, finally reaches in the voussoir cover 22 by further slipping into of voussoir 21 to clamp the purpose that hoist rope 5 makes it stop motion.
In addition, the utility model also can be fixed on correspondence and has on the body of the tower of a linear portion hoist rope.
Also have, as a kind of replacement, above-mentioned velocity measurement mechanisms also be the rotary encoder by PLC control, measures the linear velocity of hoist rope by rotary encoder, and by the electromagnet of controlling by PLC with the way of propelling and rope gripper interlock.
Claims (10)
1. the tower crane anti-falling safety device is characterized in that, comprises
In order to the linear velocity of the hoist rope that measures tower crane, have velocity measurement mechanisms and the speed measuring device of the trigger mechanism that tests the speed, be fixed on the body of the tower of tower crane; With
Rope gripper is fixed on the body of the tower of tower crane, and interlock is in the trigger mechanism that tests the speed.
2. tower crane anti-falling safety device according to claim 1 is characterized in that, described velocity measurement mechanisms is a fifth wheel, and this fifth wheel directly is pressed on the hoist rope.
3. tower crane anti-falling safety device according to claim 2 is characterized in that, the described trigger mechanism that tests the speed is by flexible axle and rope gripper interlock.
4. tower crane anti-falling safety device according to claim 1, it is characterized in that, described velocity measurement mechanisms is by the rotary encoder of PLC control, be installed on the pulley or fifth wheel of tower crane, and the described trigger mechanism that tests the speed is the electromagnet by PLC control.
5. according to claim 3 or 4 described tower crane anti-falling safety devices, it is characterized in that, described rope gripper comprise one with test the speed the uncoupling rigging of trigger mechanism interlock.
6. tower crane anti-falling safety device according to claim 1 is characterized in that, described rope gripper two wedge shape friction linings pass through between two wedge shape friction linings at least one hoist rope.
7. tower crane anti-falling safety device according to claim 2 is characterized in that, described speed measuring device has one to be used for hoist rope is clamped in contact roller on the fifth wheel.
8. according to claim 2 or 4 described tower crane anti-falling safety devices, it is characterized in that the described trigger mechanism that tests the speed comprises an electric safety switch with its interlock.
9. tower crane anti-falling safety device according to claim 1, it is characterized in that, described anti-falling safety device is fixed on the tower cap head sheave and the body of the tower between the crane arm deflection sheave of tower crane, or correspondence has on the body of the tower of a linear portion hoist rope.
10. tower crane anti-falling safety device according to claim 1 is characterized in that, described speed measuring device and rope gripper be by the transom structure that links into an integrated entity, or is installed separately on the body of the tower that is fixed on tower crane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202382630U CN201634328U (en) | 2009-11-02 | 2009-11-02 | Anti-dropping safety device for tower crane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202382630U CN201634328U (en) | 2009-11-02 | 2009-11-02 | Anti-dropping safety device for tower crane |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201634328U true CN201634328U (en) | 2010-11-17 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202382630U Expired - Fee Related CN201634328U (en) | 2009-11-02 | 2009-11-02 | Anti-dropping safety device for tower crane |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201634328U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104843587A (en) * | 2014-02-17 | 2015-08-19 | 刘德民 | Crane movable pulley apparatus with rope breaking protection and anti-falling mechanism |
| CN105059831A (en) * | 2015-07-20 | 2015-11-18 | 安徽无为冠雄建材机械有限公司 | Transmission chain brake clamping seat |
| CN106517016A (en) * | 2016-06-24 | 2017-03-22 | 华北电力大学（保定） | Jacking clamping and broke rope protection mechanism of single-column winch lifting device |
| CN107934821A (en) * | 2017-11-11 | 2018-04-20 | 华强方特（芜湖）文化科技有限公司 | A kind of stage single-point hangs complemental brake system |
| CN112374394A (en) * | 2020-11-30 | 2021-02-19 | 湖南煤矿机械有限公司 | Anti-falling safety device of tower crane |
-
2009
- 2009-11-02 CN CN2009202382630U patent/CN201634328U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104843587A (en) * | 2014-02-17 | 2015-08-19 | 刘德民 | Crane movable pulley apparatus with rope breaking protection and anti-falling mechanism |
| CN105059831A (en) * | 2015-07-20 | 2015-11-18 | 安徽无为冠雄建材机械有限公司 | Transmission chain brake clamping seat |
| CN106517016A (en) * | 2016-06-24 | 2017-03-22 | 华北电力大学（保定） | Jacking clamping and broke rope protection mechanism of single-column winch lifting device |
| CN107934821A (en) * | 2017-11-11 | 2018-04-20 | 华强方特（芜湖）文化科技有限公司 | A kind of stage single-point hangs complemental brake system |
| CN107934821B (en) * | 2017-11-11 | 2023-10-13 | 华强方特（芜湖）文化科技有限公司 | Auxiliary braking device for single-point crane of stage |
| CN112374394A (en) * | 2020-11-30 | 2021-02-19 | 湖南煤矿机械有限公司 | Anti-falling safety device of tower crane |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101117 Termination date: 20151102 |
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| EXPY | Termination of patent right or utility model |