CN110654998A - Tower crane jacking anti-overturning device - Google Patents
Tower crane jacking anti-overturning device Download PDFInfo
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- CN110654998A CN110654998A CN201911127907.3A CN201911127907A CN110654998A CN 110654998 A CN110654998 A CN 110654998A CN 201911127907 A CN201911127907 A CN 201911127907A CN 110654998 A CN110654998 A CN 110654998A
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- jacking
- tower crane
- limit switch
- support
- overturn
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- 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
- B66C23/88—Safety gear
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- Mechanical Engineering (AREA)
- Jib Cranes (AREA)
Abstract
The invention provides a tower crane jacking overturn-preventing device which comprises a support, an elastic piece, a limit switch and a support rod, wherein the support rod is rotatably arranged on the support, one end of the support rod in the length direction is connected with the elastic piece, the support rod rotates by taking the support as a fulcrum through the extension or the shortening of the elastic piece, the limit switch and the elastic piece are positioned on the same side of the support rod, and the support rod is contacted with or separated from the limit switch through the rotation of the support rod, so that the action of the limit switch is realized. The risk that the tower crane topples because the maloperation leads to the tower crane in the festival in-process is fallen in dismantling to effectual having avoided simultaneously that tower crane jacking adds the festival or dismantles and falls the festival in-process, and operating personnel starts four big mechanisms in violation of rules and regulations and leads to the tower crane unbalance to take place the accident of toppling.
Description
Technical Field
The invention relates to the technical field of tower cranes, in particular to a tower crane jacking overturn-preventing device.
Background
When the tower crane is used for disassembling the standard section, the movement stroke of the jacking oil cylinder still exists after the working standard of disassembling the section is reached due to the fact that the jacking cross beam is placed on the wrong jacking step. The back is transported out to the standard festival that will dismantle, at this moment if operating personnel carried out wrong operation to jacking cylinder and will lead to the jacking to climb the frame and still move to the top, lead to the jacking to climb frame upper portion the jacking guide pulley break away from standard festival top surface, will lose balance and fixed fulcrum above the tower crane, consequently will lead to the emergence of major safety accident.
Meanwhile, no matter the tower crane is in the process of jacking and section adding or dismounting and section lowering, the tower crane is strictly forbidden to carry out rotation action, upper and lower hook movement, small amplitude movement and heavy object hoisting, otherwise, the accident of machine damage and human death can be caused. If the operator starts the four mechanisms by misoperation, the tower crane is out of balance, and therefore serious safety accidents can happen.
In conclusion, a tower crane jacking overturn-preventing device is urgently needed to solve the problems in the prior art.
Disclosure of Invention
The invention aims to provide a tower crane jacking overturn-preventing device, which has the following specific technical scheme:
the utility model provides a device that topples is prevented in tower crane jacking, prevent that toppling device includes support, elastic component, limit switch and branch, branch rotatable set up in on the support, the elastic component is connected to branch length direction's one end, through the elastic component extension or shorten realize branch with the support rotates as the fulcrum, limit switch and elastic component are located same one side of branch, rotate through branch and realize that branch and limit switch contact or separate, and then realize the limit switch action.
In the above technical solution, preferably, a roller is further disposed on one side of the support rod close to the standard knot.
Preferably, in the above technical scheme, the overturn preventing device moves relative to the standard knot along with the jacking frame, and the roller and the standard knot move relative to each other to realize contact or separation of the roller and the standard knot; under the action of the elastic piece, the roller is contacted with or separated from the standard knot to realize the rotation of the support rod relative to the support.
Preferably, in the above technical solution, the elastic member is a spring.
Preferably, in the above technical solution, the anti-overturn device is divided into a first anti-overturn device and a second anti-overturn device according to an installation form;
the first overturn preventing device is arranged on a lower rotary support, the lower rotary support is arranged on the jacking climbing frame and moves relative to the standard joint along with the jacking climbing frame, and the four mechanisms of the tower crane are controlled to be powered on or powered off through the action of a limit switch on the first overturn preventing device;
the second anti-overturning device is arranged on the jacking climbing frame and located between the jacking climbing frame and the standard joint, and the jacking pump station is controlled to be powered on or powered off through the action of a limit switch on the second anti-overturning device.
Preferably, in the above technical scheme, the support and the limit switch in the first overturn preventing device are both arranged on the lower rotary support, one end of the support rod is connected with the lower rotary support through an elastic member, and the other end of the support rod is provided with a roller.
Preferably among the above technical scheme, among the second anti-overturning device support and limit switch all set up in on the frame is climbed in the jacking, the one end of branch is passed through the elastic component and is connected the jacking and climb the frame, and sets up the gyro wheel at this end.
The technical scheme of the invention has the following beneficial effects:
(1) the tower crane jacking overturn-preventing device comprises a support, an elastic piece, a limit switch and a support rod, wherein the support rod is rotatably arranged on the support, one end of the support rod is connected with the elastic piece, the support rod rotates by taking the support as a fulcrum through the extension or shortening of the elastic piece, the limit switch and the elastic piece are positioned on the same side of the support rod, and the support rod is contacted with or separated from the limit switch through the rotation of the support rod, so that the action of the limit switch is realized. The overturn preventing device is simple in structure, the lever principle is utilized to be matched with the elastic piece to realize that the supporting rod is in contact with the limit switch to apply pressure to the limit switch, or the supporting rod is separated from the limit switch to stop applying pressure to the limit switch, the four mechanisms and the jacking pump station are controlled to be powered on or powered off through the action of the limit switch, and therefore major safety accidents in the process of adding or lowering sections of the tower crane are effectively prevented; by utilizing the lever principle, reliable pressure can be applied to the limit switch, and the working reliability of the overturn preventing device is ensured.
(2) According to the tower crane jacking overturn-preventing device, the roller is further arranged on one side, close to the standard knot, of the supporting rod, the roller is in contact with the standard knot, so that relative movement with the standard knot is achieved, and the phenomenon that the service life of the standard knot and the supporting rod is shortened due to abrasion caused by the fact that the supporting rod is in direct contact with the standard knot is avoided.
(3) The tower crane jacking anti-overturning device is divided into a first anti-overturning device and a second anti-overturning device, wherein the first anti-overturning device controls the four mechanisms of a tower crane to be powered on or powered off through the action of a limit switch, the second anti-overturning device controls the jacking pump station to be powered on or powered off through the action of the limit switch, the first anti-overturning device and the second anti-overturning device respectively correspond to different problems in the prior art, cannot interfere with each other and can work independently; first anti-overturning device has effectually avoided leading to major incident emergence because of violating the start-up four big mechanisms in tower crane jacking joining or dismantlement festival in-process, and the effectual tower crane of avoiding of second anti-overturning device is dismantling standard festival in-process, because the jacking crossbeam sets up the emergence that mistake and personnel maloperation lead to major incident, the effectual incident of avoiding the tower crane appearance of toppling of the combination of first anti-overturning device and second anti-overturning device.
In addition to the objects, features and advantages described above, other objects, features and advantages of the present invention are also provided. The present invention will be described in further detail below with reference to the drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic view of the anti-overturning device of the present invention applied to a tower crane;
FIG. 2 is a close-up view of the area A in FIG. 1 (the first anti-rollover device does not function as a stop);
FIG. 3 is a schematic view of the first overturn preventing device in FIG. 2 in a limiting state;
FIG. 4 is a control schematic of the first anti-rollover device of FIG. 2;
FIG. 5 is a schematic diagram of the first anti-rollover device of FIG. 2 controlling four major mechanisms;
FIG. 6 is a close-up view at B in FIG. 1 (the second anti-rollover device does not function as a stop);
FIG. 7 is a schematic view of the second overturn preventing device of FIG. 6 in a limiting state;
FIG. 8 is a control schematic of the second anti-rollover device of FIG. 6;
FIG. 9 is a schematic diagram of the second anti-tip over device of FIG. 6 controlling the lift pump station;
wherein, 1, standard festival, 1.1, standard festival top surface, 2, the jacking climbs the frame, 3, the jacking is marked time, 3.1, the upper portion jacking is marked time, 3.2, the lower part jacking is marked time, 4, the gyration undersetting, 5, the jacking guide pulley, 6, the anti-overturning device, 6.1, the support, 6.2, the spring, 6.3, limit switch, 6.4, branch, 6.5, the gyro wheel, 7, the jacking pump station.
Detailed Description
Embodiments of the invention will be described in detail below with reference to the drawings, but the invention can be implemented in many different ways, which are defined and covered by the claims.
Tower crane among the prior art includes that the jacking climbs frame 2, jacking guide pulley 5, jacking subassembly and multisection standard festival 1, and multisection standard festival range upon range of setting, the jacking climbs 2 mobile covers of frame and establishes on the standard festival 1, the jacking climbs and is equipped with jacking guide pulley 5 between frame 2 and the standard festival 1, the jacking subassembly includes jacking cylinder and jacking crossbeam, the jacking crossbeam sets up in jacking cylinder's one end, and jacking cylinder's the other end climbs frame 2 with the jacking and is connected.
In the process of adding or detaching the standard knot to or from the tower crane, the jacking cross beam is arranged on the jacking step 3 corresponding to the specific position of the standard knot, and the jacking cylinder is matched to move to realize the movement of the jacking climbing frame relative to the standard knot, so that the standard knot is added or detached.
Under the condition of correct operation, the movement stroke of the jacking oil cylinder is just enough to increase or disassemble the standard section, but when the setting position of the jacking cross beam is wrong, for example, when the jacking cross beam is not placed on the jacking step 3 at the correct position, the jacking climbing frame can be caused to move to the standard position of increasing or disassembling the standard section, and at the moment, if the wrong operation occurs, the jacking guide pulley 5 at the upper part of the jacking climbing frame can be caused to be separated from the safe position with the standard section, so that the tower crane can be caused to overturn (the accident mainly occurs in the process of disassembling the standard section, as shown in figure 1, one standard section is generally provided with two jacking steps 3 along the vertical direction, namely, the jacking step 3 comprises an upper jacking step 3.1 and a lower jacking step 3.2. under the condition of normal disassembly, the jacking cross beam is placed on the lower jacking step 3.2, and the stroke of the jacking oil cylinder can release the whole stroke, if the maloperation is placed the jacking crossbeam on upper jacking step 3.1, the jacking cylinder has the stroke of motion this moment, if the maloperation jacking cylinder can lead to jacking guide pulley and next section standard festival to break away from after the dismantlement finishes last section standard festival to cause the incident).
The four large mechanisms of the tower crane comprise a hoisting mechanism, a slewing mechanism, a luffing mechanism and a traveling mechanism, wherein the slewing mechanism is arranged on the jacking climbing frame 2 through a slewing lower support 4 and moves up and down along the standard knot along with the jacking climbing frame.
The present invention is only described in the application scenario of the anti-overturning device, and the operation method for the specific structure of the tower crane and the addition or removal of the standard section is referred to the prior art and will not be further described here.
Example 1:
referring to fig. 1-9, a device that topples is prevented in tower crane jacking, it includes support 6.1, elastic component, limit switch 6.3 and branch 6.4 to prevent toppling device 6, branch 6.4 rotatable set up in on the support 6.1, the elastic component is connected to branch 6.4 length direction's one end, through the elastic component extension or shorten realize branch 6.4 with support 6.1 rotates as the fulcrum, limit switch 6.3 and elastic component are located branch 6.4 with one side, rotate through branch 6.4 and realize that branch 6.4 contacts or separates with limit switch 6.3, and then realize limit switch 6.3 action.
Preferably, a roller 6.5 is further arranged on one side of the supporting rod 6.4 close to the standard knot 1.
The overturn preventing device 6 moves relative to the standard knot 1 along with the jacking climbing frame 2, and the roller 6.5 and the standard knot 1 move relatively to realize contact or separation of the two; under the action of the elastic element, the roller 6.5 is contacted with or separated from the standard knot 1, so that the support rod 6.4 rotates relative to the support 6.1.
Preferably, the elastic member is a spring.
The overturn preventing device 6 in this embodiment is divided into a first overturn preventing device and a second overturn preventing device according to the installation form;
the first anti-overturning device is arranged on a lower rotary support 4, the lower rotary support 4 is arranged on the jacking climbing frame 2 and moves relative to the standard joint 1 along with the jacking climbing frame 2, and the power-on or power-off of four mechanisms of the tower crane is controlled by the action of a limit switch 6.3 on the first anti-overturning device;
the second anti-overturning device is arranged on the jacking climbing frame 2 and is positioned between the jacking climbing frame 2 and the standard knot 1, and the jacking pump station 7 is controlled to be powered on or powered off through the action of the limit switch 6.3 on the second anti-overturning device.
In the first overturn preventing device, the support 6.1 and the limit switch 6.3 are both arranged on the lower rotary support 4, one end of the support rod 6.4 is connected with the lower rotary support 4 through an elastic piece, and the other end of the support rod is provided with a roller 6.5.
At the in-process of increase or dismantlement standard festival, because need climb the one section distance of frame 2 up motion standard festival business turn over tower crane of being convenient for with the jacking, the gyro wheel of first anti-overturning device can break away from with the standard festival (the gyration undersetting surpasss the balanced safe distance of calibration promptly with the standard festival). In this case, the spring is extended when the roller is suspended and the pressure is lost, and the support rod is separated from the limit switch (i.e., the support rod no longer provides pressure to the limit switch).
Referring to fig. 3-5, the limit switch in the first overturn preventing device is a first normally closed switch SQ1, the limit switch is under pressure in the normal working state of the tower crane, the first normally closed switch SQ1 in fig. 4 is turned off, the coil of the first relay KC1 is not energized, the normally closed contact of the first relay KC1 is not turned off, and the four mechanisms can work normally.
In the process of adding or detaching the standard knot, the limit switch loses pressure, the normally closed switch SQ1 is closed, the coil of the first relay KC1 is electrified, the normally closed contact of the first relay KC1 is disconnected, the power supply line 50# of the four large mechanisms is disconnected (the 50# line is a low-voltage control power line of the four large mechanisms in the prior art, different tower cranes can be different, and the four large mechanisms can be set according to actual conditions), and the four large mechanisms stop working.
Therefore, the first overturn preventing device realizes that the four mechanisms can be electrified to work only if the distance between the lower rotary support and the standard joint is within the safe distance for calibrating balance.
In the second overturn preventing device, the support 6.1 and the limit switch 6.3 are both arranged on the jacking climbing frame 2, one end of the support rod 6.4 is connected with the jacking climbing frame 2 through an elastic piece, and the end is provided with a roller 6.5.
Referring to fig. 6-9, when the standard section is disassembled, the jacking cross beam is often placed on the wrong jacking step 3 due to misoperation, and at the moment, the jacking oil cylinder still has a movement stroke, so that if the wrong operation occurs, the jacking guide pulley 5 on the upper part of the jacking climbing frame 2 is separated from the top surface 1.1 of the standard section, which is shown in fig. 7 in detail. Fig. 7 illustrates that the upper standard knot has been removed and the upper jacking guide pulley 5 is about to be detached from the next standard knot due to a faulty operation.
The working principle of the second overturn prevention device is as shown in fig. 8 and fig. 9, the limit switch in the second overturn prevention device is a second normally closed switch SQ2, under the normal working condition, the roller is not separated from the standard knot, so that the second normally closed switch SQ2 is not disconnected by the pressure of the supporting rod, the coil of the second relay KC2 is electrified, the normally open contact of the second relay KC2 is in a closed state, the coil of the alternating current contactor KM is electrified (the alternating current contactor KM is a power supply control switch of the jacking pump station 7), and the jacking pump station 7 normally provides pressure oil for the jacking oil cylinder.
Referring to fig. 7, when the maloperation leads to the jacking to climb when frame 2 continues up-moving, gyro wheel 6.5 is unsettled, branch is exerted pressure to limit switch, second normally closed switch SQ2 disconnection, second relay KC2 loses the electricity, the normally open contact of second relay KC2 is in the off-state, ac contactor KM's coil loses electricity, jacking pump station 7 stops to provide pressure oil for the jacking hydro-cylinder, the jacking climbs frame 2 and stops to continue up-moving, eliminate the risk that jacking guide pulley and standard festival break away from.
In this embodiment, the one end is two ends in the length direction of the strut, and the one side is two sides parallel to the length direction of the strut.
By applying the technical scheme of the invention, the effects are as follows:
the risk that the tower crane topples because the maloperation leads to the tower crane in the festival in-process is fallen in dismantling to effectual having avoided simultaneously that tower crane jacking adds the festival or dismantles and falls the festival in-process, and operating personnel starts four big mechanisms in violation of rules and regulations and leads to the tower crane unbalance to take place the accident of toppling.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. The utility model provides a tower crane jacking prevents device of toppling, a serial communication port, prevent device of toppling (6) including support (6.1), elastic component, limit switch (6.3) and branch (6.4), branch (6.4) rotatable set up in on support (6.1), the elastic component is connected to branch (6.4) length direction's one end, through the elastic component extension or shorten realize branch (6.4) with support (6.1) rotate as the fulcrum, limit switch (6.3) and elastic component are located same one side of branch (6.4), rotate through branch (6.4) and realize branch (6.4) and contact or separate with limit switch (6.3), and then realize limit switch (6.3) action.
2. The tower crane jacking overturn preventing device is characterized in that a roller (6.5) is further arranged on one side, close to the standard joint (1), of the supporting rod (6.4).
3. The tower crane jacking anti-overturning device according to claim 2, wherein the anti-overturning device (6) moves relative to the standard knot (1) along with the jacking climbing frame (2), and the relative movement between the roller (6.5) and the standard knot (1) realizes the contact or separation of the roller and the standard knot; under the action of the elastic piece, the roller (6.5) is contacted with or separated from the standard knot (1) to realize the rotation of the support rod (6.4) relative to the support seat (6.1).
4. The tower crane jacking overturn preventing device of claim 3, wherein the elastic member is a spring.
5. The tower crane jacking overturn-preventing device of claim 3, wherein the overturn-preventing device (6) is divided into a first overturn-preventing device and a second overturn-preventing device according to installation forms;
the first anti-overturning device is arranged on a rotary lower support (4), the rotary lower support (4) is arranged on the jacking climbing frame (2) and moves relative to the standard joint (1) along with the jacking climbing frame (2), and the power-on or power-off of four mechanisms of the tower crane is controlled by the action of a limit switch (6.3) on the first anti-overturning device;
the second anti-overturning device is arranged on the jacking climbing frame (2) and located between the jacking climbing frame (2) and the standard knot (1), and the jacking pump station (7) is controlled to be powered on or powered off through the action of a limit switch (6.3) on the second anti-overturning device.
6. The tower crane jacking overturn prevention device according to claim 5, wherein the support (6.1) and the limit switch (6.3) are both arranged on the rotary lower support (4) in the first overturn prevention device, one end of the support rod (6.4) is connected with the rotary lower support (4) through an elastic member, and the other end of the support rod is provided with a roller (6.5).
7. The tower crane jacking overturn prevention device of claim 5, wherein the second overturn prevention device is characterized in that the support (6.1) and the limit switch (6.3) are both arranged on the jacking climbing frame (2), one end of the support rod (6.4) is connected with the jacking climbing frame (2) through an elastic member, and the end is provided with a roller (6.5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911127907.3A CN110654998A (en) | 2019-11-18 | 2019-11-18 | Tower crane jacking anti-overturning device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911127907.3A CN110654998A (en) | 2019-11-18 | 2019-11-18 | Tower crane jacking anti-overturning device |
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| Publication Number | Publication Date |
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| CN110654998A true CN110654998A (en) | 2020-01-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911127907.3A Pending CN110654998A (en) | 2019-11-18 | 2019-11-18 | Tower crane jacking anti-overturning device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114414405A (en) * | 2022-01-17 | 2022-04-29 | 中国矿业大学 | Vertical force applying equipment and method for open-pit mine rock in-situ test |
-
2019
- 2019-11-18 CN CN201911127907.3A patent/CN110654998A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114414405A (en) * | 2022-01-17 | 2022-04-29 | 中国矿业大学 | Vertical force applying equipment and method for open-pit mine rock in-situ test |
| CN114414405B (en) * | 2022-01-17 | 2023-12-05 | 中国矿业大学 | Strip mine rock in-situ test vertical force application device and application method |
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