CN106429912A - Realization method of tower crane limiting device - Google Patents
Realization method of tower crane limiting device Download PDFInfo
- Publication number
- CN106429912A CN106429912A CN201610897539.0A CN201610897539A CN106429912A CN 106429912 A CN106429912 A CN 106429912A CN 201610897539 A CN201610897539 A CN 201610897539A CN 106429912 A CN106429912 A CN 106429912A
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- China
- Prior art keywords
- crane
- barrier
- switch
- stopping means
- radial
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Classifications
-
- 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
- B66C23/90—Devices for indicating or limiting lifting moment
- B66C23/905—Devices for indicating or limiting lifting moment electrical
-
- 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
- B66C23/94—Safety gear for limiting slewing movements
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Jib Cranes (AREA)
Abstract
The invention discloses a realization method of a tower crane limiting device. When a jib of a tower crane approaches an obstacle, the limiting device controls a power supply of a motor which runs toward the direction of the obstacle to be cut off, controls a power supply of a motor which runs toward the opposite direction of the obstacle to be turned on and controls the jib of the tower crane to keep far away from the obstacle. The realization method has the following advantages that according to different rotational angles of the jib, the radial movement distance of a crab is limited to enable the radial movement distance of a hoisted object to be different along with different rotational angles, thus the movement range of the hoisted object is conveniently and flexibly arranged without a movement dead zone.
Description
Technical field
The present invention relates to a kind of implementation method of formula crane stopping means, belongs to electric power safety protection technology field.
Background technology
The stopping means of derrick crane trolley limit trolley on crane arm now（Handling object）
Move radially distance, the rotary caging device of crane arm limits crane arm one on the upper branching holder of slew gear
Rotation in fixed angle, above two spacing measures, limit trolley respectively moves radially distance and the anglec of rotation so that
There are some dead bands in hoisting object, the position that hoisting object should be able to reach and can not reach.As Fig. 1, the region in great circle O2 is
When not carrying out spacing, hoisting object maximum moving area, has barrier near derrick crane（As power circuit, heavy line
For power circuit）, hoisting object is not to be exceeded the right side of straight line AB, and hoisting object should be moved in gray area.In order to not miss
Barrier is touched, if using the variable-amplitude limiting device on crane arm, hoisting object can only be moved in the region of roundlet O1, no
The region between roundlet O1 and great circle O2 can be reached.If utilizing rotary caging device, hoisting object can only be in great circle O2
Move in subregion and the trigonum that ABO is formed can not be reached.
Content of the invention
The technical problem to be solved in the present invention is for above not enough, provides a kind of realization of formula crane stopping means
Method, realizes the different rotary angle according to crane arm, and limit trolley moves radially distance, makes hoisting object with rotation
The distance that the difference of gyration is moved radially is also different therewith, so as to the moving range of convenient, flexible setting hoisting object, no
The purpose in mobile dead band occurs.
For solving above technical problem, the present invention is employed the following technical solutions：
A kind of implementation method of formula crane stopping means, when the crane arm of the formula crane is close to barrier, spacing
Device controls the motor power to the operation of barrier direction to disconnect, and controls and starts to the motor power of barrier reverse direction operation,
The crane arm of control formula crane is away from barrier.
Further, the implementation method is further comprising the steps of：
Step 9, when hoisting object is close to barrier, radial fretting switch motion, control becomes the electricity that spoke motor runs to distal end
Source disconnects, and controls the power supply of turning motor to disconnect.
Further, the implementation method is further comprising the steps of：
Step 10, starts change spoke motor and proximally runs, and crane arm is moved to barrier opposite direction, and radial fretting switch leaves limit
Position plate, the normal opened contact of radial fretting switch disconnects.
Further, the implementation method is further comprising the steps of：
Step 12, when hoisting object is close to barrier, tangential fretting switch motion, control crane arm turning motor is transported counterclockwise
The power supply of row disconnects, while controlling to becoming, spoke motor is run to distal end and the power supply of near-end disconnects.
Further, the implementation method is further comprising the steps of：
Step 13, starts crane arm turning motor, and crane arm is moved to barrier opposite direction, and tangential fretting switch leaves spacing
Plate, the normal opened contact of microswitch disconnects.
Further, the implementation method is further comprising the steps of：
Step 2, determines spacing plate shape step according to barrier shape, and spacing plate shape determines that principle is：The limiting plate
The shape of limit part is consistent with the shape of barrier, and the very little to the greatest extent dimension scale with barrier of the limit part of limiting plate is equal to
The ratio of the jib length of positioning annular radii and derrick crane.
Further, the implementation method is further comprising the steps of：
Step 1, by positioning annulus by bolt on the lower bearing support of derrick crane；
Step 3, by limiting plate on positioning annulus；
Step 4, installing connecting rods centering guide on positioning annulus；
Step 5, installs displacement transducer on the crane arm of derrick crane；
Step 6, installs kinematic link；
Step 7, guider in the middle part of the installing connecting rods on kinematic link.
Further, the implementation method is further comprising the steps of：
Step 8, determines the installation site of radial fretting switch, installs radial fretting switch on kinematic link, and radial fretting is opened
The installation site of pass determines that principle is：When trolley moves to the distalmost end of the crane arm of derrick crane, radial fretting is opened
Close and contact with positioning annulus and make radial fretting that action message is switched, when trolley moves to the crane arm of derrick crane
Most proximal end when being close to derrick crane center, radial fretting switch also is moved into being close to the center of positioning annulus.
Further, the implementation method is further comprising the steps of：
Step 9, installs tangential switch, installation principle：In the installation place of radial fretting switch, tangential fretting switch is installed, radially micro-
Dynamic switch switchs right angle setting with tangential fretting.
Stopping means of the present invention have advantages below：
According to the different rotary angle of crane arm, limit trolley moves radially distance, makes hoisting object with the anglec of rotation
The distance that the difference of degree is moved radially is also different therewith, so as to the moving range of convenient, flexible setting hoisting object, will not go out
Dead band is now moved.
The restriction moving range outer shape of hoisting object is identical with the shape of limiting plate, by changing the shape of limiting plate
And installation site, the moving range of hoisting object can be flexibly limited, solving hoisting object can only be in radial distance or the anglec of rotation
The single spacing spacing pattern of degree.
The present invention is described in detail with reference to the accompanying drawings and examples.
Description of the drawings
Fig. 1 is accompanying drawing in the background technology of the present invention；
Fig. 2 is the stopping means top view of the present invention；
Fig. 3 is the stopping means side view of the present invention；
Fig. 4 is the connecting rod centering guide structural representation of the present invention；
Fig. 5 is the displacement transducer structural representation of the present invention；
Fig. 6 is indicated for the linear limiting plate installation site of the present invention and is intended to；
Fig. 7 is indicated for the L-shaped limiting plate installation site of the embodiment of the present invention 2 and is intended to；
Fig. 8 is the tangential fretting switch scheme of installation of the embodiment of the present invention 2；
Fig. 9 is the derrick crane stopping means electrical schematic diagram of the embodiment of the present invention 1；
Figure 10 is the derrick crane stopping means electrical schematic diagram of the embodiment of the present invention 2；
In figure：1- positioning annulus, 2- limiting plate, 3- kinematic link, 4- radial fretting is switched, and 5- displacement transducer, in 6- connecting rod
Heart guider, guider in the middle part of 7- connecting rod, 8- tangential fretting is switched, 51- input shaft, 52- one-stage gear, 53- secondary gear,
54- tertiary gear, 55- tooth bar, 61- firm banking, 62- centre strut, 62- rotating cap, 64- guide through hole, A12- lower support
Seat, A13- crane arm, A14- jib lubbing mechanism reel.
Specific embodiment
Embodiment 1, illustrates so that barrier is a power circuit as an example.
As shown in Figure 2 and Figure 3, a kind of formula crane stopping means, including limiting plate 2 and positioning annulus 1, position annulus 1
Installing hole is formed around, installing hole is used for installing limiting plate 2.
The shape of the limit part of the limiting plate 2 is identical with power circuit, is a line segment, and limiting plate 2 is in setting circle
Installation site on ring 1 is corresponding to power circuit in the position of the crane arm A13 end turning circle of derrick crane, such as Fig. 6, electricity
Line of force road meets at 2 points of A, B with the crane arm A13 end turning circle of derrick crane, and limiting plate 2 meets at C, D with positioning annulus 1
Point, the centre of gyration for positioning the center of annulus 1 and the crane arm A13 of derrick crane be O, 3 points of O, C, A point-blank,
3 points of O, D, B is in straight line, and AB is parallel with CD, and the ratio of CD and AB is equal to the ratio of OC and OA.
That is, the shape of the limit part of the limiting plate 2 is consistent with the shape of barrier, the limit part of limiting plate 2
The very little dimension scale with barrier is equal to the ratio of the crane arm A13 length of positioning 1 radius of annulus and derrick crane to the greatest extent, spacing
Plate 2 corresponds to position of the barrier on the crane arm A13 end turning circle of derrick crane in the installation site of positioning annulus 1
Put.
The positioning annulus 1 is formed by band steel bending, and positioning annulus 1 is circle, and the center for positioning annulus 1 is provided with
Connecting rod centering guide 6.
The positioning annulus 1 is by bolt on the lower bearing support A12 of derrick crane, and makes connecting rod centre pilot
The centre of gyration consistency from top to bottom of the crane arm A13 of the center of device 6 and derrick crane, positioning annulus 1 is not with derrick crane
The rotation of crane arm A13 and change position.
As shown in figure 4, the connecting rod centering guide 6 includes firm banking 61, centre strut 62 and rotating cap 63, rotate
Cap 63 is rotated around centre strut 62, and 63 upper end of rotating cap is provided with guide through hole 64.
The stopping means also include displacement transducer 5, and the structure of displacement transducer 5 is as shown in figure 5, displacement transducer 5
Including input shaft 51, tooth bar 55, secondary gear 53 and tertiary gear 54, one-stage gear 52, secondary gear are installed on input shaft 51
Wheel 53 and tertiary gear 54 are arranged on same axle and synchronous axial system, and one-stage gear 52 engages 53 with secondary gear, three-level tooth
Wheel 54 is engaged with tooth bar 55.
The stopping means also include kinematic link 3, and the front end of kinematic link 3 is connected with displacement transducer 5, kinematic link
3 rear end is through the guide through hole 64 of connecting rod centering guide 6, and slides in guide through hole 64.
For 3 flexural deformation of kinematic link is prevented, on the crane arm A13 of derrick crane, one is equipped with every 2-3 meter ampere
Guider 7 in the middle part of connecting rod, in the middle part of connecting rod, guider 7 accurately transmits trolley to 3 fixations of kinematic link and guide effect
The change in displacement that motion causes.
The displacement transducer 5 is arranged on the crane arm A13 of derrick crane, the jib lubbing mechanism reel of derrick crane
The axle of A14 is connected with the input shaft 51 of displacement transducer 5, and the jib lubbing mechanism reel A14 of derrick crane is rotated, and is wound on tower
Hawser traction trolley on the jib lubbing mechanism reel A14 of heavy-duty machine makees radial motion, the jib lubbing mechanism reel of derrick crane
A14 drives the input shaft 51 of displacement transducer 5 to rotate, and makes kinematic link 3 make radial motion, by displacement transducer 5 by lifting
The displacement of dolly is delivered to kinematic link 3 in proportion, and displacement transmitted ratio is equal to jib length with positioning annulus 1
The ratio of radius.
Radial fretting switch 4 is installed on the kinematic link 3, the installation site of radial fretting switch 4 determines that principle is：
When trolley moves to the distalmost end of crane arm A13 of derrick crane, radial fretting switch 4 is contacted simultaneously with positioning annulus 1
Radial fretting is made to switch 4 action messages, when trolley moves to the most proximal end of the crane arm A13 of derrick crane and is close to tower
During formula crane center, radial fretting switch 4 also is moved into being close to the center of positioning annulus 1.
As shown in figure 9, the normal opened contact of the radial fretting switch 4 is serially connected in the coil of radial direction auxiliary reclay 1ZJ,
First pair of normally closed contact of radial direction auxiliary reclay 1ZJ is serially connected in and becomes in the contactor coil 1KM1 that spoke motor is run to distal end,
The second couple of radial direction auxiliary reclay, the 3rd pair of normally closed contact are serially connected in the catalyst line of the rotate counterclockwise of turning motor respectively
In the circle 2KM2 and contactor coil 2KM1 for turning clockwise.
A kind of implementation method of formula crane stopping means, including procedure below step：
Step 1, by positioning annulus by bolt on the lower bearing support of derrick crane,；
Step 2, determines spacing plate shape according to barrier shape；
The spacing plate shape determines that principle is：The shape of the limit part of the limiting plate is consistent with the shape of barrier, limit
The very little to the greatest extent dimension scale with barrier of the limit part of position plate is equal to the lifting brachium of positioning annular radii and derrick crane
The ratio of degree.
Step 3, by limiting plate on positioning annulus；
Step 4, installing connecting rods centering guide on positioning annulus；
Step 5, installs displacement transducer on the crane arm of derrick crane；
Step 6, installs kinematic link；
Installation principle：The front end of kinematic link is connected with displacement transducer, and the rear end of kinematic link passes through connecting rod centering guide
Guide through hole, and in guide through hole slide.
Step 7, guider in the middle part of the installing connecting rods on kinematic link；
Installation principle：Every 2-3 meter ampere, guider in the middle part of one connecting rod is housed on the crane arm of derrick crane.
Step 8, determines the installation site of radial fretting switch, installs radial fretting switch on kinematic link；
The installation site of the radial fretting switch determines that principle is：Trolley moves to the crane arm of derrick crane most
During distal end, radial fretting switch is contacted with positioning annulus and makes radial fretting switch action message, when trolley moves to tower
The most proximal end of the crane arm of formula crane when being close to derrick crane center, radial fretting switch also is moved into being close to setting circle
The center of ring.
Step 9, when hoisting object is close to barrier, radial fretting switch motion, control becomes spoke motor and runs to distal end
Power supply disconnect, becoming spoke motor proximally can only run, and control the power supply of turning motor to disconnect, and derrick crane can not carry out back
Transhipment is dynamic；
Step 10, starts change spoke motor and proximally runs, and crane arm leaves limit to barrier reverse direction operation, radial fretting switch
Position plate, the normal opened contact of radial fretting switch disconnects, and derrick crane resumes operation.
Example 2, illustrates so that barrier is a L-shaped wall as an example.
Limiting plate 2 in example 2 is L-shaped, as shown in figure 8, example 2 is square counterclockwise at the tangential fretting switch 8 of example 1
To tangential fretting switch 8 is increased, other ingredients are identical with example 1.
The installation of the limiting plate 2 as shown in fig. 7, the limit part shape of limiting plate 2 is identical with L-shaped wall, is L-shaped line
Section, limiting plate 2 positioning annulus 1 installation site corresponding to L-shaped wall in the position of crane arm A13 end turning circle, L-shaped wall with
Crane arm A13 end turning circle meets at 2 points of A, B, and limiting plate 2 meets at C, D point with positioning annulus 1, and the summit of L-shaped wall is E, limit
The summit of position plate 2 is F, and the centre of gyration for positioning 1 center of annulus and crane arm A13 is O, 3 points of O, F, E in straight line, O, C,
Point-blank, 3 points of O, D, B is in straight line, and AE is parallel with CF, and BE is parallel with DF, and the ratio of AE and CF is equal to for 3 points of A
The ratio of OC and OA.
The installation place of the radial fretting switch is provided with tangential fretting switch 8, and radial fretting switch is opened with tangential fretting
8 right angle settings are closed, as shown in Figure 8.
As shown in Figure 10, the normal opened contact of the tangential fretting switch 8 is serially connected in the coil of tangential auxiliary reclay 2ZJ
In, first pair of normally closed contact of tangential auxiliary reclay 2ZJ is serially connected in the contact of control crane arm turning motor rotate counterclockwise
In device coil 2KM1, second pair of normally closed contact of tangential auxiliary reclay 2ZJ and the 3rd pair of normally closed contact are serially connected in change spoke respectively
Motor is in the operation contactor coil 1KM2 of distal end operation contactor coil 1KM1 and near-end.
A kind of implementation method of formula crane stopping means, including procedure below step：
When hoisting object is close to the AE section of barrier, course of action carries out spacing as described in Example 1；
When hoisting object is close to the BE section of barrier, implementation method is as follows：
Step 1, by positioning annulus by bolt on the lower bearing support of derrick crane,；
Step 2, determines spacing plate shape according to barrier shape；
The spacing plate shape determines that principle is：The shape of the limit part of the limiting plate is consistent with the shape of barrier, limit
The very little to the greatest extent dimension scale with barrier of the limit part of position plate is equal to the lifting brachium of positioning annular radii and derrick crane
The ratio of degree.
Step 3, by limiting plate on positioning annulus；
Step 4, installing connecting rods centering guide on positioning annulus；
Step 5, installs displacement transducer on the crane arm of derrick crane；
Step 6, installs kinematic link；
Installation principle：The front end of kinematic link is connected with displacement transducer, and the rear end of kinematic link passes through connecting rod centering guide
Guide through hole, and in guide through hole slide.
Step 7, guider in the middle part of the installing connecting rods on kinematic link；
Installation principle：Every 2-3 meter ampere, guider in the middle part of one connecting rod is housed on the crane arm of derrick crane.
Step 8, determines the installation site of radial fretting switch, installs radial fretting switch on kinematic link；
The installation site of the radial fretting switch determines that principle is：Trolley moves to the crane arm of derrick crane most
During distal end, radial fretting switch is contacted with positioning annulus and makes radial fretting switch action message, when trolley moves to tower
The most proximal end of the crane arm of formula crane when being close to derrick crane center, radial fretting switch also is moved into being close to setting circle
The center of ring.
Step 11, installs tangential switch；
Installation principle：In the installation place of radial fretting switch, tangential fretting switch is installed, radial fretting switch is opened with tangential fretting
Close right angle setting.
Step 12, when hoisting object is close to the BE section of barrier, tangential fretting switch motion, control crane arm turning motor
The power supply of operation disconnects counterclockwise, while controlling to becoming, spoke motor is run to distal end and the power supply of near-end disconnects, becomes spoke motor not
Can operation；
Step 13, start crane arm turning motor, after crane arm is rotated clockwise, crane arm to the reverse direction operation of barrier,
Tangential fretting switch leaves limiting plate, and the normal opened contact of microswitch disconnects, and derrick crane resumes operation.
The above is the citing of best mode for carrying out the invention, and it is common that the part that does not wherein address in detail is this area
The common knowledge of technical staff.Protection scope of the present invention is defined by the content of claim, any technology based on the present invention
The equivalent transformation for enlightening and carrying out, also within protection scope of the present invention.
Claims (9)
1. a kind of implementation method of formula crane stopping means, it is characterised in that：The crane arm of the formula crane is close to
During barrier, stopping means control the motor power to the operation of barrier direction to disconnect, and control to barrier reverse direction operation
Motor power starts, and controls the crane arm of formula crane away from barrier.
2. a kind of implementation method of formula crane stopping means as claimed in claim 1, it is characterised in that：The realization side
Method is further comprising the steps of：
Step 9, when hoisting object is close to barrier, radial fretting switch motion, control becomes the electricity that spoke motor runs to distal end
Source disconnects, and controls the power supply of turning motor to disconnect.
3. a kind of implementation method of formula crane stopping means as claimed in claim 1, it is characterised in that：The realization side
Method is further comprising the steps of：
Step 10, starts change spoke motor and proximally runs, and crane arm is moved to barrier opposite direction, and radial fretting switch leaves limit
Position plate, the normal opened contact of radial fretting switch disconnects.
4. a kind of implementation method of formula crane stopping means as claimed in claim 1, it is characterised in that：The realization side
Method is further comprising the steps of：
Step 12, when hoisting object is close to barrier, tangential fretting switch motion, control crane arm turning motor is transported counterclockwise
The power supply of row disconnects, while controlling to becoming, spoke motor is run to distal end and the power supply of near-end disconnects.
5. a kind of implementation method of formula crane stopping means as claimed in claim 1, it is characterised in that：The realization side
Method is further comprising the steps of：
Step 13, starts crane arm turning motor, and crane arm is moved to barrier opposite direction, and tangential fretting switch leaves spacing
Plate, the normal opened contact of microswitch disconnects.
6. a kind of implementation method of formula crane stopping means as claimed in claim 1, it is characterised in that：The realization side
Method is further comprising the steps of：
Step 2, determines spacing plate shape step according to barrier shape, and spacing plate shape determines that principle is：The limiting plate
The shape of limit part is consistent with the shape of barrier, and the very little to the greatest extent dimension scale with barrier of the limit part of limiting plate is equal to
The ratio of the jib length of positioning annular radii and derrick crane.
7. a kind of implementation method of formula crane stopping means as claimed in claim 1, it is characterised in that：The realization side
Method is further comprising the steps of：
Step 1, by positioning annulus by bolt on the lower bearing support of derrick crane；
Step 3, by limiting plate on positioning annulus；
Step 4, installing connecting rods centering guide on positioning annulus；
Step 5, installs displacement transducer on the crane arm of derrick crane；
Step 6, installs kinematic link；
Step 7, guider in the middle part of the installing connecting rods on kinematic link.
8. a kind of implementation method of formula crane stopping means as claimed in claim 1, it is characterised in that：The realization side
Method is further comprising the steps of：
Step 8, determines the installation site of radial fretting switch, installs radial fretting switch on kinematic link, and radial fretting is opened
The installation site of pass determines that principle is：When trolley moves to the distalmost end of the crane arm of derrick crane, radial fretting is opened
Close and contact with positioning annulus and make radial fretting that action message is switched, when trolley moves to the crane arm of derrick crane
Most proximal end when being close to derrick crane center, radial fretting switch also is moved into being close to the center of positioning annulus.
9. a kind of implementation method of formula crane stopping means as claimed in claim 1, it is characterised in that：The realization side
Method is further comprising the steps of：
Step 9, installs tangential switch, installation principle：In the installation place of radial fretting switch, tangential fretting switch is installed, radially micro-
Dynamic switch switchs right angle setting with tangential fretting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610897539.0A CN106429912B (en) | 2016-10-15 | 2016-10-15 | A kind of implementation method of derrick crane limiting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610897539.0A CN106429912B (en) | 2016-10-15 | 2016-10-15 | A kind of implementation method of derrick crane limiting device |
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| Publication Number | Publication Date |
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| CN106429912A true CN106429912A (en) | 2017-02-22 |
| CN106429912B CN106429912B (en) | 2018-08-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610897539.0A Expired - Fee Related CN106429912B (en) | 2016-10-15 | 2016-10-15 | A kind of implementation method of derrick crane limiting device |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DD275446A1 (en) * | 1988-09-15 | 1990-01-24 | Bauakademie Ddr | SAFETY DEVICE FOR BOOMS WITH RUNNING CATS |
| CN101108715A (en) * | 2007-08-15 | 2008-01-23 | 李海青 | Movable cam type synthetic limiting device of carriage amplitude varying tower crane |
| CN201087090Y (en) * | 2007-08-21 | 2008-07-16 | 李海青 | Disk cam type synthetic limiting device of luffing jib tower crane |
| CN201321356Y (en) * | 2008-12-30 | 2009-10-07 | 赵洪 | Tower cranes group collision prevention and region and boundary protection system |
| CN201343399Y (en) * | 2008-12-30 | 2009-11-11 | 大连高新起重电器厂 | Microcomputer rotary position-limiting and speed-limiting combination switch |
| CN203877805U (en) * | 2014-01-20 | 2014-10-15 | 陆锐 | Automatic anti-collision control device of tower crane |
-
2016
- 2016-10-15 CN CN201610897539.0A patent/CN106429912B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DD275446A1 (en) * | 1988-09-15 | 1990-01-24 | Bauakademie Ddr | SAFETY DEVICE FOR BOOMS WITH RUNNING CATS |
| CN101108715A (en) * | 2007-08-15 | 2008-01-23 | 李海青 | Movable cam type synthetic limiting device of carriage amplitude varying tower crane |
| CN201087090Y (en) * | 2007-08-21 | 2008-07-16 | 李海青 | Disk cam type synthetic limiting device of luffing jib tower crane |
| CN201321356Y (en) * | 2008-12-30 | 2009-10-07 | 赵洪 | Tower cranes group collision prevention and region and boundary protection system |
| CN201343399Y (en) * | 2008-12-30 | 2009-11-11 | 大连高新起重电器厂 | Microcomputer rotary position-limiting and speed-limiting combination switch |
| CN203877805U (en) * | 2014-01-20 | 2014-10-15 | 陆锐 | Automatic anti-collision control device of tower crane |
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| Publication number | Publication date |
|---|---|
| CN106429912B (en) | 2018-08-14 |
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