CN109484972B - Assembled gantry crane - Google Patents
Assembled gantry crane Download PDFInfo
- Publication number
- CN109484972B CN109484972B CN201810736973.XA CN201810736973A CN109484972B CN 109484972 B CN109484972 B CN 109484972B CN 201810736973 A CN201810736973 A CN 201810736973A CN 109484972 B CN109484972 B CN 109484972B
- Authority
- CN
- China
- Prior art keywords
- section
- pin
- pin joint
- main beam
- gantry crane
- 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.)
- Active
Links
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 47
- 239000010959 steel Substances 0.000 claims abstract description 47
- 238000012544 monitoring process Methods 0.000 claims abstract description 31
- 238000013016 damping Methods 0.000 claims abstract description 28
- 230000008859 change Effects 0.000 claims description 13
- 238000003466 welding Methods 0.000 claims description 8
- 230000000694 effects Effects 0.000 claims description 6
- 230000002787 reinforcement Effects 0.000 claims description 3
- 230000035939 shock Effects 0.000 abstract description 8
- 239000006096 absorbing agent Substances 0.000 description 6
- 230000009471 action Effects 0.000 description 4
- 238000010276 construction Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000032258 transport Effects 0.000 description 4
- 230000001133 acceleration Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 241001139947 Mida Species 0.000 description 1
- 238000004873 anchoring Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C5/00—Base supporting structures with legs
- B66C5/02—Fixed or travelling bridges or gantries, i.e. elongated structures of inverted L or of inverted U shape or tripods
-
- 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
- B66C13/16—Applications of indicating, registering, or weighing devices
-
- 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
- B66C13/40—Applications of devices for transmitting control pulses; Applications of remote control devices
- B66C13/44—Electrical transmitters
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C19/00—Cranes comprising trolleys or crabs running on fixed or movable bridges or gantries
- B66C19/02—Cranes comprising trolleys or crabs running on fixed or movable bridges or gantries collapsible
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C6/00—Girders, or track-supporting structures, specially adapted for cranes
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Automation & Control Theory (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Control And Safety Of Cranes (AREA)
Abstract
The gantry crane comprises a main beam section, a supporting leg section, a damping device and an intelligent monitoring system; the main beam section is of a steel truss structure, and the bottoms of the two ends of the main beam section are provided with extension parts; the extension portion is connected to the leg segment, and the shock absorbing device is disposed between the extension portion and the leg segment. The assembled gantry crane is convenient to transport, can be formed by directly splicing on site, and the intelligent monitoring system can monitor the working state of the gantry crane in real time and timely adjust the beam transporting speed of the gantry crane, so that the gantry crane can work more safely.
Description
Technical Field
The invention relates to the field of expressway construction, in particular to a spliced gantry crane transportation construction.
Background
The gantry crane is also called a portal crane, and is widely applied to hoisting construction sites because of being independent of buildings. In particular for hoisting and short distance transport of fixed areas. Has the characteristics of energy conservation, environmental protection and high reliability. The gantry cranes used at present are formed by splicing steel materials on site, are not suitable for transportation and have certain inconvenience.
Disclosure of Invention
The invention aims to:
The invention aims to solve the problems of the prior art by providing a safe and reliable assembled gantry crane which is simple to install and convenient to transport.
The technical scheme is as follows:
In order to solve the technical problems, the technical scheme of the invention is as follows.
The utility model provides a portal crane that can assemble which characterized in that: the gantry crane comprises a main beam section (1), a supporting leg section (2), a damping device and an intelligent monitoring system; the main beam section (1) is of a steel truss structure, and the bottoms of the two ends of the main beam section are provided with extension parts; the extension part is connected to the support leg section (2), and the damping device is arranged between the extension part and the support leg section (2).
Each girder section is formed by welding two triangular trusses (3) and a connecting plate (4); each triangular truss is formed by welding three I-steel and a plurality of web members; the connecting plate is formed by assembling I-steel, the top of the connecting plate is welded with the two triangular trusses (3), the bottom of the connecting plate is provided with two extending parts, and each extending part comprises a pin joint column (5) perpendicular to the connecting plate (4) and a connecting disc (6) of a damping device arranged at the bottom end of the pin joint column (5).
The bottom of connection pad (6) sets up to pin joint (7), and pin joint (7) are the column casing structure, are provided with multiunit pinhole on the lateral wall of pin joint (7), and every group pinhole is a plurality of pinholes (8) that set up along the axial direction top-down of pin joint (7), and the center of every group pinhole is on same vertical line.
The multiple groups of pin holes are circumferentially arranged along the side wall of the pin joint (7), and the included angle between two adjacent groups of pin holes is 120 degrees. (that is, the connection line between the holes of each group of pin holes forms a vertical line which is connected with the axis of the pin joint (7) to form a connection surface, and the included angle between two adjacent connection surfaces is 120 DEG)
The landing leg section (2) comprises an upper inserting section (9) and a lower supporting section (10) arranged at the lower part of the upper inserting section (9), a supporting tray (11) for supporting the damping device is arranged between the upper inserting section (9) and the lower supporting section (10), an auxiliary pin hole (8-1) corresponding to the pin hole (8) in the pin joint (7) is arranged on the upper inserting section (9), the upper inserting section (9) can be inserted into the pin joint (7) in a structure when in use, and the pin hole (8) corresponds to the auxiliary pin hole (8-1) one by one approximately when the upper inserting section (9) is inserted into the pin joint (7), and the straight groove elastic cylindrical pin is inserted into the pin hole (8-1) to realize connection.
A spring (13) is arranged between the connecting disc (6) and the bearing disc (11) as a damping device.
A scissor brace (14) is arranged between the supporting leg sections (2); the landing leg section and the ground are supported by three points; two sides of the supporting leg section (2) adopt steel cables (12) to form a diagonal reinforcement structure, one end of each steel cable (12) is anchored on an anchor ingot, and the other end of each steel cable is anchored on a pull ring of a portal crane connecting plate; the included angle between the steel cable and the ground is 45 degrees. The support can play a role in wind prevention.
The girder section (1) is provided with an overhead traveling crane (15), and the overhead traveling crane (15) is provided with an intelligent monitoring system. The intelligent monitoring system consists of a wireless sensor (16) which is arranged at the pin joint and used for monitoring the strain change of the pin joint, a wireless sensor (17) which is arranged at the middle position of the girder section and used for monitoring the strain change of the girder section, and a control system of the control room; a wireless sensor (16) mounted at the pin joint location and a wireless sensor (17) mounted at the intermediate location of the main beam section are connected to a control system of the control room, which functions to monitor the change in strain at the pin joint location and the intermediate location of the main beam. If the dangerous value is reached, the system can give a command of decelerating or stopping to the trolley, so as to protect the gantry crane and reduce the occurrence of accidents. The wireless sensor for monitoring strain change is an existing sensor and can be directly purchased. And will not be described in detail here.
The wireless sensor (17) arranged at the middle position of the main beam section is fixed through a temporary clamping device, the temporary clamping device comprises a top plate (18), a rotary shell (19), a lifting clamping device and a vertical rod (20), the top plate (18) is a disc base, the rotary shell (19) is of a cylindrical structure, the top end of the rotary shell (19) is movably connected with the top plate (18) and the rotary shell (19) can rotate relative to the top plate (18), (namely, the rotary shell (19) rotates but the top plate (18) does not rotate), the bottom of the top plate (18) is provided with a round table (21) with a small bottom and a big top, the center of the round table (21) is provided with a telescopic hole (22), the upper end of the telescopic rod (23) stretches into the telescopic hole (22) and the telescopic rod (23) can axially move in a telescopic way relative to the telescopic hole (22), the lower end of the telescopic rod (23) is provided with a transverse connecting rod (24), and the transverse connecting rod (24) is perpendicular to the telescopic rod (23);
two ends of the transverse connecting rod (24) are respectively provided with a movable clamping plate (25), the movable clamping plates (25) are movably arranged at two ends of the transverse connecting rod (24) through rotating shafts to form a lever structure, the upper parts of the movable clamping plates (25) extend into the rotary shell (19) and contact with the bottom of the side wall of the round table (21), and the lower parts of the movable clamping plates (25) extend out of the bottom outlet of the rotary shell (19);
An annular clamping ring (26) is arranged around the inner edge of the bottom outlet of the rotary shell (19), two openings (27) are formed in the annular clamping ring (26), and the two openings (27) are symmetrically arranged relative to the circle center of the ring (26); the outer side wall of the movable clamping plate (25) is provided with a plurality of bulges (28) from top to bottom for clamping, and the plurality of bulges are arranged to meet different clamping positions, so that different bulges can be selected for clamping according to the requirements, and the application range of the movable clamping plate is wider; the bulge (28) is a structure which can only pass through the notch (27); when the clamp is used, the protrusions (28) are aligned with the openings (27), then the sensor is clamped between the two movable clamp plates (25), then the movable clamp plates (25) are held to push upwards, the protrusions (28) penetrate through the openings (27) and then enter the clamping ring (26), meanwhile, the upper ends of the movable clamp plates (25) move along the outer wall of the round table (21), the lower ends of the movable clamp plates (25) gradually clamp the sensor, then the rotary shell (19) is screwed, the openings (27) are staggered by the protrusions (28), and the non-opening portions of the clamping ring (26) clamp the protrusions (28) to prevent the movable clamp plates (25) from moving downwards, so that clamping is achieved;
the upper end of roof (18) is through setting up in the one end of horizontal lifter (29) of pivot activity, and the other end cover of horizontal lifter (29) is on perpendicular thick stick (20), and horizontal lifter (29) remain perpendicularly and horizontal lifter (29) can do the lift removal from top to bottom along the axial of perpendicular thick stick (20) all the time with perpendicular thick stick (20), is provided with down spring (30) between the other end of horizontal lifter (29) and the top of perpendicular thick stick (20), and the force of pushing down spring (30) with horizontal lifter (29) down is kept all the time. When in use, the vertical bar (20) is fixed at a designated position through bolts, and then the sensor is installed.
When the sensor is used, the transverse lifting rod (29) is lifted upwards, then the top plate (18) is turned upwards to a position where the top plate (18) is vertical to a plane, then the transverse lifting rod (29) can be loosened to enable the sensor to naturally fall down, then the sensor is clamped between the two movable clamping plates (25), the movable clamping plates (25) are pushed towards the top plate (18), the sensor is clamped by the movable clamping plates (25), then the rotating shell (19) is screwed, the clamping ring (26) clamps the boss (28) to complete fixation, then the transverse lifting rod (29) is lifted upwards again, then the top plate (18) is rotated, the top plate (18) is located at a position parallel to the plane, namely the sensor is enabled to fall down, then the transverse lifting rod (29) is loosened, and under the action of the pressing spring (30), the sensor is enabled to be pressed on the surface of a measured object downwards, and fixation is completed. During disassembly, the transverse lifting rod (29) is lifted upwards, the top plate (18) is turned over, the rotary shell (19) is screwed so that the notch (27) is aligned with the boss (28) again, and then the sensor is pulled out.
The advantages and effects are that:
the invention discloses an assembled gantry crane which mainly comprises four parts, including a main beam section, a supporting leg section, a damping device and an intelligent monitoring system. The spliced gantry crane is formed by splicing a main beam section and a supporting leg section, wherein the main beam section and the supporting leg section adopt straight-groove elastic cylindrical pins. The damping device is arranged at the connection position of the main beam section and the supporting leg section, and the intelligent monitoring system is respectively arranged at the middle position of the main beam section and the connection position of the main beam and the supporting leg section. The assembled gantry crane is convenient to transport, can be formed by directly splicing on site, and the intelligent monitoring system can monitor the working state of the gantry crane in real time and timely adjust the beam transporting speed of the gantry crane, so that the gantry crane can work more safely.
Drawings
FIG. 1 is a front view of a main beam section;
FIG. 2 is a cross-sectional view of a main beam section;
FIG. 3 is a cross-sectional view of a leg segment;
FIG. 4 is an overall modeling diagram;
FIG. 5 is a graph of combined stress for operating conditions;
FIG. 6 is a graph of combined shear stress for operating conditions;
FIG. 7 is a graph of combined maximum reaction force for operating conditions;
FIG. 8 is a graph of an analysis of operating mode buckling stability;
FIG. 9 is a schematic view of a temporary clamping device;
Fig. 10 is a schematic bottom view of the swivel housing of fig. 9.
Specific implementation measures
The invention will now be described in further detail with reference to the drawings and examples.
The invention comprises a main beam section, a supporting leg section and an intelligent monitoring system.
The girder section comprises a steel truss girder part and two extending parts connected with the supporting leg sections. The main beam part is two triangular steel trusses. The end of each extension part is a disc with the diameter slightly larger than that of the supporting leg, and the disc is connected with the straight groove elastic cylindrical pin and the damping device.
The leg sections comprise a left leg section and a right leg section, and the left leg section and the right leg section have the same structure. The upper end of the supporting leg section is a connecting device of a straight groove elastic cylindrical pin and a damping spring, and the middle section of the supporting leg section is a scissor supporting component.
The gantry crane comprises a main beam section (1), a supporting leg section (2), a damping device and an intelligent monitoring system; the main beam section (1) is of a steel truss structure, and the bottoms of the two ends of the main beam section are provided with extension parts; the extension part is connected to the support leg section (2), and the damping device is arranged between the extension part and the support leg section (2).
Each girder section is formed by welding two triangular trusses (3) and a connecting plate (4); each triangular truss is formed by welding three I-steel and a plurality of web members; the connecting plate is formed by assembling I-steel, the top of the connecting plate is welded with the two triangular trusses (3), the bottom of the connecting plate is provided with two extending parts, and each extending part comprises a pin joint column (5) perpendicular to the connecting plate (4) and a connecting disc (6) of a damping device arranged at the bottom end of the pin joint column (5).
The bottom of connection pad (6) sets up to pin joint (7), and pin joint (7) are the column casing structure, are provided with multiunit pinhole on the lateral wall of pin joint (7), and every group pinhole is a plurality of pinholes (8) that set up along the axial direction top-down of pin joint (7), and the center of every group pinhole is on same vertical line.
The multiple groups of pin holes are circumferentially arranged along the side wall of the pin joint (7), and the included angle between two adjacent groups of pin holes is 120 degrees. (that is, the connection line between the holes of each group of pin holes forms a vertical line which is connected with the axis of the pin joint (7) to form a connection surface, and the included angle between two adjacent connection surfaces is 120 DEG)
The landing leg section (2) comprises an upper inserting section (9) and a lower supporting section (10) arranged at the lower part of the upper inserting section (9), a supporting tray (11) for supporting the damping device is arranged between the upper inserting section (9) and the lower supporting section (10), an auxiliary pin hole (8-1) corresponding to the pin hole (8) in the pin joint (7) is arranged on the upper inserting section (9), the upper inserting section (9) can be inserted into the pin joint (7) in a structure when in use, and the pin hole (8) corresponds to the auxiliary pin hole (8-1) one by one approximately when the upper inserting section (9) is inserted into the pin joint (7), and the straight groove elastic cylindrical pin is inserted into the pin hole (8-1) to realize connection.
A spring (13) is arranged between the connecting disc (6) and the bearing disc (11) as a damping device.
A scissor brace (14) is arranged between the supporting leg sections (2); the landing leg section and the ground are supported by three points; two sides of the supporting leg section (2) adopt steel cables (12) to form a diagonal reinforcement structure, one end of each steel cable (12) is anchored on an anchor ingot, and the other end of each steel cable is anchored on a pull ring of a portal crane connecting plate; the included angle between the steel cable and the ground is 45 degrees. The support can play a role in wind prevention.
The girder section (1) is provided with an overhead traveling crane (15), and the overhead traveling crane (15) is provided with an intelligent monitoring system. The intelligent monitoring system consists of a wireless sensor (16) which is arranged at the pin joint and used for monitoring the strain change of the pin joint, a wireless sensor (17) which is arranged at the middle position of the girder section and used for monitoring the strain change of the girder section, and a control system of the control room; a wireless sensor (16) mounted at the pin joint location and a wireless sensor (17) mounted at the intermediate location of the main beam section are connected to a control system of the control room, which functions to monitor the change in strain at the pin joint location and the intermediate location of the main beam. If the dangerous value is reached, the system can give a command of decelerating or stopping to the trolley, so as to protect the gantry crane and reduce the occurrence of accidents. The wireless sensor for monitoring strain change is an existing sensor and can be directly purchased. And will not be described in detail here.
The wireless sensor (17) arranged at the middle position of the main beam section is fixed through a temporary clamping device, the temporary clamping device comprises a top plate (18), a rotary shell (19), a lifting clamping device and a vertical rod (20), the top plate (18) is a disc base, the rotary shell (19) is of a cylindrical structure, the top end of the rotary shell (19) is movably connected with the top plate (18) and the rotary shell (19) can rotate relative to the top plate (18), (namely, the rotary shell (19) rotates but the top plate (18) does not rotate), the bottom of the top plate (18) is provided with a round table (21) with a small bottom and a big top, the center of the round table (21) is provided with a telescopic hole (22), the upper end of the telescopic rod (23) stretches into the telescopic hole (22) and the telescopic rod (23) can axially move in a telescopic way relative to the telescopic hole (22), the lower end of the telescopic rod (23) is provided with a transverse connecting rod (24), and the transverse connecting rod (24) is perpendicular to the telescopic rod (23);
two ends of the transverse connecting rod (24) are respectively provided with a movable clamping plate (25), the movable clamping plates (25) are movably arranged at two ends of the transverse connecting rod (24) through rotating shafts to form a lever structure, the upper parts of the movable clamping plates (25) extend into the rotary shell (19) and contact with the bottom of the side wall of the round table (21), and the lower parts of the movable clamping plates (25) extend out of the bottom outlet of the rotary shell (19);
An annular clamping ring (26) is arranged around the inner edge of the bottom outlet of the rotary shell (19), two openings (27) are formed in the annular clamping ring (26), and the two openings (27) are symmetrically arranged relative to the circle center of the ring (26); the outer side wall of the movable clamping plate (25) is provided with a plurality of bulges (28) for clamping from top to bottom, and the bulges (28) are of a structure which can only pass through the notch (27); when the clamp is used, the protrusions (28) are aligned with the openings (27), then the sensor is clamped between the two movable clamp plates (25), then the movable clamp plates (25) are held to push upwards, the protrusions (28) penetrate through the openings (27) and then enter the clamping ring (26), meanwhile, the upper ends of the movable clamp plates (25) move along the outer wall of the round table (21), the lower ends of the movable clamp plates (25) gradually clamp the sensor, then the rotary shell (19) is screwed, the openings (27) are staggered by the protrusions (28), and the non-opening portions of the clamping ring (26) clamp the protrusions (28) to prevent the movable clamp plates (25) from moving downwards, so that clamping is achieved;
the upper end of roof (18) is through setting up in the one end of horizontal lifter (29) of pivot activity, and the other end cover of horizontal lifter (29) is on perpendicular thick stick (20), and horizontal lifter (29) remain perpendicularly and horizontal lifter (29) can do the lift removal from top to bottom along the axial of perpendicular thick stick (20) all the time with perpendicular thick stick (20), is provided with down spring (30) between the other end of horizontal lifter (29) and the top of perpendicular thick stick (20), and the force of pushing down spring (30) with horizontal lifter (29) down is kept all the time. When in use, the vertical bar (20) is fixed at a designated position through bolts, and then the sensor is installed.
When the sensor is used, the transverse lifting rod (29) is lifted upwards, then the top plate (18) is turned upwards to a position where the top plate (18) is vertical to a plane, then the transverse lifting rod (29) can be loosened to enable the sensor to naturally fall down, then the sensor is clamped between the two movable clamping plates (25), the movable clamping plates (25) are pushed towards the top plate (18), the sensor is clamped by the movable clamping plates (25), then the rotating shell (19) is screwed, the clamping ring (26) clamps the boss (28) to complete fixation, then the transverse lifting rod (29) is lifted upwards again, then the top plate (18) is rotated, the top plate (18) is located at a position parallel to the plane, namely the sensor is enabled to fall down, then the transverse lifting rod (29) is loosened, and under the action of the pressing spring (30), the sensor is enabled to be pressed on the surface of a measured object downwards, and fixation is completed. During disassembly, the transverse lifting rod (29) is lifted upwards, the top plate (18) is turned over, the rotary shell (19) is screwed so that the notch (27) is aligned with the boss (28) again, and then the sensor is pulled out.
In addition, the gantry crane is assembled, and the main beam section and the supporting leg section are spliced in a pin joint mode. The girder section adopts I-steel as the girder structure of the gantry crane, and adopts square steel pipes as web members.
The connection between the main girder section and the supporting leg section of the gantry crane adopts a pin joint mode, and straight groove elastic cylindrical pins are used at the connection positions of the extending parts of the main girder section and the supporting leg section. The straight elastic cylindrical pin rolls or dies three (120 DEG apart) grooves along the generatrix of the pin body, is driven into the pin hole and is tightly pressed with the hole wall, so that the straight elastic cylindrical pin is not easy to loose and can bear vibration and cyclic load. The full length of the pin is provided with parallel grooves, the end part of the pin is provided with two types of guide rods and chamfers, the pressure distribution between the pin and the hole wall is more uniform, and the pin is used for occasions with serious vibration and impact load.
Damping devices are arranged around pin joints among the sections of the gantry crane. The shock absorber assembly comprises a shock absorber, a lower spring pad, a spring, a shock absorber pad, an upper spring pad, a spring seat, a bearing, a top rubber and a nut. The damping device can absorb energy generated by the vibration of the gantry crane by utilizing the contraction of the spring, reduces the vibration phenomenon generated by the operation of the gantry crane, and restores the original state after the vibration is finished. This can protect the gantry crane.
(1) In fig. 1 and 2, the girder segments are welded by two triangular trusses, each of which is welded by a plurality of square steel web members and i-steel girders. And placing the two triangular trusses side by side and welding the two triangular trusses with one side plane of the I-steel connecting plate. The other side plane of the connecting plate is an extension part of the main beam section. The extension of the main beam section is four steel pipes of the same diameter as the leg sections, and the steel pipe ends are discs of slightly larger diameter than the steel pipes so as to mount the pin joint portions. And welding is adopted between the disc and the straight groove elastic cylindrical pin, and a row of pin holes along the direction of the steel pipe are formed on the straight groove elastic cylindrical pin every 90 degrees, and each row of pin holes is 4 pin holes. In addition, a damping device is installed in the remaining space between the disc and the cylindrical pin plug. The damping device is connected with the disc through bolts. Four damping devices are arranged on each supporting leg. Each damper is spaced 90 degrees apart.
(2) In fig. 3 and 4, the leg section includes four steel tubes and a scissors section. The scissor struts and the steel pipes are welded in advance to form a whole. The connecting parts of the support leg sections and the main beam sections are provided with 4 rows of pin holes, each row of pin holes is provided with 4 pin holes, and the arrangement mode and the aperture size of the pin holes are the same as those of the main beam sections. A lower disc is arranged below the pin hole, and the other end of the damping device is fixed with the lower disc.
(3) When the landing leg section and the main beam section are spliced, the pin holes are aligned in a consistent manner, the straight-groove elastic cylindrical pins are gently knocked into the pin holes by using a hammer, and the next splicing is performed after stability is determined.
(4) The shock absorber assembly comprises a shock absorber, a lower spring pad, a spring, a shock absorber pad, an upper spring pad, a spring seat, a bearing, a top rubber and a nut. The damping device may utilize the shock absorbing effect of the spring. When the gantry crane receives impact, the springs in the damping device can be contracted to absorb energy generated by vibration, so that the influence of impact on the pin joint part when the gantry crane lifts cargoes is reduced. When the gantry crane is stable, the spring can be restored, and the gantry crane can still work continuously. The clamp can be arranged outside the pin joint and the spring, so that the pin joint part and the spring are protected to a certain extent.
(5) One end of the steel cable is connected with the connecting port on the connecting plate, and the other end is connected with the anchoring point buried in the ground. Each leg should be equipped with a steel cable, 6×6×19 steel cable is used. The included angle between the steel cable and the ground is 45 degrees. In addition, the steel cable is ensured to be in a relatively tight working state so as to play a role in stabilizing the gantry crane and preventing wind.
(6) After the assembled gantry crane is spliced without errors, the same erection mode as that of a common gantry crane can be adopted, and after the erection is finished, the steel cable and the supporting legs play a role in three-point support, so that the gantry crane is better stabilized.
(7) And wireless sensors are arranged at the middle position of the main beam section and the connection position of the main beam section and the support leg section. A small clamping groove is welded at the middle position of the lower chord members of the supporting leg section and the main beam section, a shell corresponding to the small clamping groove in size is installed around the wireless sensor, the shell is sleeved in the clamping groove, and the size of the shell is close to that of the sensor. The wireless sensor can transmit real-time strain values of the main beam section and the support leg section to the intelligent monitoring system. Is a system similar to that in a beam truck with wireless monitoring and control system. When the assembled gantry crane transports beams, the intelligent monitoring system monitors the strain value at the monitoring position at any time, and when the strain value exceeds a certain fixed value, the monitoring system can give a speed-down instruction to reduce the beam transporting speed, so that the gantry crane is in a safe working environment at any time.
This is illustrated herein and verifies the feasibility of the fabricated high and low leg gantry crane.
The 50T gantry crane adopts two fixed supports, the distance between the fixed supports at two ends is 21m, and the net height is about 4-11m. The portal crane girders are assembled by two groups of triangular trusses, the height of a tripod is 2.4m, and each girder adopts 2 rows of triangular frames.
The main truss of the tripod adopts 2 workers 25a double-spliced I-steel with the interval of 2000cm.
The door crane supporting legs are of steel pipe structures, the low supporting legs are all made of steel pipes with the diameter of2 phi 630 multiplied by 10, and the high supporting legs are all made of steel pipes with the diameter of4 phi 630 multiplied by 10.
The landing leg sets up four parallel connection connecting rods.
The calculated load comprises dead weight load, lifting load and lifting mass transverse movement inertia force.
The gravity of the structure, mechanical equipment, electrical equipment, storage bins attached to the crane and the like mainly comprises the weight of a rod piece, a gusset plate, a bolt, a zenith lifting system, a running system and the like of the assembled gantry crane. According to the construction of the gantry crane, the calculation is counted by midas. The lifting quality is that the horizontal force generated by the longitudinal movement of the gantry crane acts on the crane beam according to the rigid connection with the crane, the acting point is on the trolley wheel, and the acting direction is opposite to the acceleration direction. The loading direction is longitudinal.
PH2＝1.5ma＝1.5×(3000+60000)×0.16＝15120kg·m/s2＝1.51t
The transverse inertia force of the lifting load mainly occurs when the overhead travelling crane is suddenly started or braked, the action point is the contact point of the overhead travelling crane steel wheel and the track, the travelling speed of the overhead travelling crane is temporarily v=0.25 m/s, the (decreasing) speed time t=3.2 s, and the (decreasing) speed a=0.078 m/s 2, so that the transverse inertia force of the lifting mass load is.
PH3＝1.5ma＝1.5×(8000+3000+60000)×0.078＝8307kg·m/s2＝0.8t
The motion coefficient to be considered is a lifting impact coefficient phi 1, a lifting load dynamic load coefficient phi 2 and a motion impact load phi 3.
The lifting impact coefficient is the impact effect of dead weight load along the opposite direction of the acceleration when the lifting mass suddenly lifts off the ground or descends to brake. When considering the load combination under such working conditions, the dead weight load P G should be multiplied by the lifting impact coefficient, where Φ 1 =1.1.
The dynamic load coefficient of the lifting load is a dynamic load increasing coefficient phi 2 which is required to be given to the lifting load in consideration of a certain vibration generated by a structural object when the lifting mass is lifted suddenly off the ground or is braked downwards, and the phi 2 is calculated according to the following formula:
Wherein:
v-rated lifting speed, m/s; the hoisting speed is related to the linear speed of the winding drum of the winding machine and the number of movable pulley wheels, and the hoisting speed of the tentative v=0.05 m/s is calculated.
C—an operating coefficient, for a general hook, using c=0.5 in the specification recommendations;
g-gravitational acceleration, g=9.81 m/s 2;
lambda 0 -displacement of pulley block to upper pulley block under rated lifting load, and can be 7 for various cranes
Approximately λ 0 =0.0029h, H is the actual rise, here the safer h=10m, which occurs less.
Y 0 -the structural static deflection value of the article hanging part under the rated lifting load, the bridge crane (including the gantry crane) can be: y 0 = (1/700) L, l=21m:
Then y 0 = (1/700) L L =21m=0.033m
Delta-structural quality influence coefficient, the value of which is calculated according to the following formula:
m 1 -the mass of the structure at the point of suspension of the article, kg; for a bridge crane, half of the mass of the trolley and the mass of the bridge frame are taken.
M 2 -lifting rated mass.
Through calculation and analysis, phi 2 is approximately equal to 1
The motion impact coefficient is the coefficient mainly considering that the moving mass generates impact action in the vertical direction due to uneven track in the running process of the gantry crane, and when working conditions of the gantry crane for lifting heavy object running are calculated, the self-weight load and lifting load of the structure are multiplied by the impact load coefficient phi 3:
Wherein: v is the running speed, where v=0.5 m/s is tentatively taken.
H—two rail faces at the rail joint have a height difference, taking h=5mm.
The combination coefficient Φ=Φ 1×φ2×φ3 =1.1×1.165=1.28.
The working condition is that the gantry crane is walking, the overhead travelling crane lifts the object suddenly in the main beam span, and moves transversely rapidly, at the moment, the main beam generates maximum bending moment stress and deformation, and meanwhile, the integral buckling stability under the working condition is checked. Overall modeling using midascivil2010,2010 was performed according to the load combination situation as shown in fig. 4:
The combined stress diagram of the working conditions is shown in fig. 5.
The working condition combined shear stress diagram is shown in fig. 6.
The maximum counterforce diagram of the working condition combination is shown in fig. 7.
The analysis of the stability of the buckling under the working conditions is shown in FIG. 8.
The maximum combined stress of the gantry crane component is 125Mpa < [ sigma ] =140 Mpa under the working condition combination, and the gantry crane component occurs in the midspan of the upper chord member of the main beam, so that local reinforcing measures can be considered; maximum shear stress 29.2Mpa < [ tau ] =85 Mpa, and safety reserve is high; the maximum displacement deformation [ f ] =21000/400=52.5 mm maximum deflection position occurs at the beam midspan position and is mainly caused by lifting load; a maximum support reaction force 501kN; the integral buckling stability coefficient is 10.2 & gt4, and the structure has enough stability.
The strength, rigidity and stability of the structure meet the requirements.
Claims (2)
1. The utility model provides a portal crane that can assemble which characterized in that: the gantry crane comprises a main beam section (1), a supporting leg section (2), a damping device and an intelligent monitoring system; the main beam section (1) is of a steel truss structure, and the bottoms of the two ends of the main beam section are provided with extension parts; the extending part is connected to the supporting leg section (2), and the damping device is arranged between the extending part and the supporting leg section (2);
Each girder section is formed by welding two triangular trusses (3) and a connecting plate (4); each triangular truss is formed by welding three I-steel and a plurality of web members; the connecting plate is formed by assembling I-steel, the top of the connecting plate is welded with the two triangular trusses (3), the bottom of the connecting plate is provided with two extending parts, and each extending part comprises a pin joint column (5) perpendicular to the connecting plate (4) and a connecting disc (6) of a damping device arranged at the bottom end of each pin joint column (5);
the bottom of the connecting disc (6) is provided with a pin joint (7), the pin joint (7) is of a cylindrical structure, a plurality of groups of pin holes are formed in the side wall of the pin joint (7), each group of pin holes are a plurality of pin holes (8) formed from top to bottom along the axial direction of the pin joint (7), and the centers of the pin holes are positioned on the same vertical line;
The pin holes of the plurality of groups are circumferentially arranged along the side wall of the pin joint (7), and the included angle between two adjacent groups of pin holes is 120 degrees;
The landing leg section (2) comprises an upper plug-in section (9) and a lower support section (10) arranged at the lower part of the upper plug-in section (9), a supporting tray (11) for supporting the damping device is arranged between the upper plug-in section (9) and the lower support section (10), an auxiliary pin hole (8-1) corresponding to the pin hole (8) on the pin joint (7) is arranged on the upper plug-in section (9), the upper plug-in section (9) is of a structure which can be inserted into the pin joint (7) when being used, the pin hole (8) corresponds to the auxiliary pin hole (8-1) one by one when the upper plug-in section (9) is inserted into the pin joint (7), and the straight groove elastic cylindrical pin is inserted into the pin hole (8-1) to realize connection;
A spring (13) is arranged between the connecting disc (6) and the bearing disc (11) as a damping device;
an overhead travelling crane (15) is arranged on the main beam section (1), and the overhead travelling crane (15) is provided with an intelligent monitoring system;
The intelligent monitoring system consists of a wireless sensor (16) for monitoring the strain change of the pin joint, a wireless sensor (17) for monitoring the strain change of the girder section, and a control system of a control room, wherein the wireless sensor is arranged at the position of the pin joint and is used for monitoring the strain change of the girder section; a wireless sensor (16) for monitoring the strain change of the pin joint and a wireless sensor (17) for monitoring the strain change of the main beam section are arranged at the middle position of the main beam section, and the wireless sensor is connected to a control system of a control room;
The wireless sensor (17) arranged at the middle position of the main beam section is fixed through a temporary clamping device, the temporary clamping device comprises a top plate (18), a rotary shell (19), a lifting clamping device and a vertical rod (20), the top plate (18) is a disc base, the rotary shell (19) is of a cylindrical structure, the top end of the rotary shell (19) is movably connected with the top plate (18) and the rotary shell (19) can rotate relative to the top plate (18), a round table (21) with a small bottom and a large top is arranged at the bottom of the top plate (18), a telescopic hole (22) is formed in the center of the round table (21), the upper end of the telescopic rod (23) stretches into the telescopic hole (22) and the telescopic rod (23) can axially move in a telescopic way relative to the telescopic hole (22), and a transverse connecting rod (24) is arranged at the lower end of the telescopic rod (23) and is perpendicular to the telescopic rod (23);
Two ends of the transverse connecting rod (24) are respectively provided with a movable clamping plate (25), the movable clamping plates (25) are movably arranged at two ends of the transverse connecting rod (24) through rotating shafts to form a lever structure, the upper parts of the movable clamping plates (25) extend into the rotary shell (19) and contact with the bottom of the side wall of the round table (21), and the lower parts of the movable clamping plates (25) extend out of the bottom outlet of the rotary shell (19);
An annular clamping ring (26) is arranged around the inner edge of the bottom outlet of the rotary shell (19), two openings (27) are formed in the annular clamping ring (26), and the two openings (27) are symmetrically arranged relative to the circle center of the ring (26); the outer side wall of the movable clamping plate (25) is provided with a plurality of bulges (28) for clamping from top to bottom, and the bulges (28) are of a structure which can only pass through the notch (27); when the clamp is used, the protrusions (28) are aligned with the openings (27), then the sensor is clamped between the two movable clamp plates (25), then the movable clamp plates (25) are held to push upwards, the protrusions (28) penetrate through the openings (27) and then enter the clamping ring (26), meanwhile, the upper ends of the movable clamp plates (25) move along the outer wall of the round table (21), the lower ends of the movable clamp plates (25) gradually clamp the sensor, then the rotary shell (19) is screwed, the openings (27) are staggered by the protrusions (28), and the non-opening portions of the clamping ring (26) clamp the protrusions (28) to prevent the movable clamp plates (25) from moving downwards, so that clamping is achieved;
The upper end of roof (18) is through setting up in the one end of horizontal lifter (29) of pivot activity, and the other end cover of horizontal lifter (29) is on perpendicular thick stick (20), and horizontal lifter (29) remain perpendicularly and horizontal lifter (29) can do the lift removal from top to bottom along the axial of perpendicular thick stick (20) all the time with perpendicular thick stick (20), is provided with down spring (30) between the other end of horizontal lifter (29) and the top of perpendicular thick stick (20), and the force of pushing down spring (30) with horizontal lifter (29) down is kept all the time.
2. The sectional gantry crane of claim 1, wherein: a scissor brace (14) is arranged between the supporting leg sections (2); the landing leg section and the ground are supported by three points; two sides of the supporting leg section (2) adopt steel cables (12) to form a diagonal reinforcement structure, one end of each steel cable (12) is anchored on an anchor ingot, and the other end of each steel cable is anchored on a pull ring of a portal crane connecting plate; the included angle between the steel cable and the ground is 45 degrees.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810736973.XA CN109484972B (en) | 2018-07-02 | 2018-07-02 | Assembled gantry crane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810736973.XA CN109484972B (en) | 2018-07-02 | 2018-07-02 | Assembled gantry crane |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109484972A CN109484972A (en) | 2019-03-19 |
| CN109484972B true CN109484972B (en) | 2024-07-09 |
Family
ID=65689143
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810736973.XA Active CN109484972B (en) | 2018-07-02 | 2018-07-02 | Assembled gantry crane |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109484972B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111453620B (en) * | 2020-03-27 | 2023-02-28 | 中亿丰建设集团股份有限公司 | Hoisting equipment for bridge construction |
| CN113582010B (en) * | 2021-07-24 | 2022-06-17 | 中建一局集团第五建筑有限公司 | Gantry crane reinforcing structure and reinforcing method |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN209193383U (en) * | 2018-07-02 | 2019-08-02 | 中交路桥北方工程有限公司 | A kind of combinable gantry crane |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101386397B (en) * | 2008-10-28 | 2011-01-26 | 高旭 | Anti-collision control method for gantry crane lifting trolley |
| CN201580914U (en) * | 2009-12-28 | 2010-09-15 | 北京奥宇模板有限公司 | Monospar trackless combination gantry crane |
| KR101245513B1 (en) * | 2010-07-06 | 2013-03-20 | (주)새텍 | Equipped with sensors and sensor-operated unmanned crane hook |
| CN205312915U (en) * | 2016-01-12 | 2016-06-15 | 云南力神重工机械有限公司 | Double -beam portal crane |
| CN205653070U (en) * | 2016-05-18 | 2016-10-19 | 无锡石油化工起重机有限公司 | Tensile gantry crane can monitor |
| KR20180015516A (en) * | 2016-08-03 | 2018-02-13 | 김명호 | Apparatus and methods for controlling crane for anti-collision of container |
| CN108214684B (en) * | 2018-01-05 | 2022-12-27 | 金华市亚虎工具有限公司 | Aluminum type multifunctional clamping table |
-
2018
- 2018-07-02 CN CN201810736973.XA patent/CN109484972B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN209193383U (en) * | 2018-07-02 | 2019-08-02 | 中交路桥北方工程有限公司 | A kind of combinable gantry crane |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109484972A (en) | 2019-03-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109610330B (en) | Hole passing method of bridge girder erection machine | |
| CN109484972B (en) | Assembled gantry crane | |
| CN105544398A (en) | Horizontal force self-balancing type splayed heavy type upper air support system and installation method thereof | |
| CN100417586C (en) | Integral lifting method of large bridge crane and its appts | |
| US20230312309A1 (en) | A Grid Framework Structure | |
| CN111456422A (en) | Belt supporting device and method for conical steel truss on top of sliding-form silo of squat silo wall | |
| CN103132702A (en) | Longspan pipe truss pulling bar lifting and overhead rotating emplacing construction method | |
| CN203173749U (en) | Assembled integral type vertical self-jacking device of hydraulic double-type crane tower | |
| CN111218987A (en) | Bearing type net rack construction method | |
| CN201530686U (en) | Super high-rise building top weight lifting equipment | |
| CN102381643B (en) | Tower crane | |
| CN101700855B (en) | Method and device for lifting weight on top floor of super high-rise building | |
| CN108221702B (en) | Integral lifting device for arch rib of inward-tilting steel box arch bridge | |
| CN115341701B (en) | Hanging formwork construction method for high-altitude overhanging steel bar truss floor support plate | |
| CN209193383U (en) | A kind of combinable gantry crane | |
| CN106368322A (en) | Installing method of bidirectional symmetric oblique steel posts used between super high-rise building transfer stories | |
| CN106193102B (en) | A kind of tower crane relay handling Shelf device | |
| CN212224666U (en) | Steel truss assembling system | |
| KR20130131540A (en) | Prop for rail loading and peripheral device of overhead slewing crane girder | |
| NO20210882A1 (en) | ||
| CN111705931A (en) | Construction method of large-span grid structure | |
| CN220376184U (en) | Mounting structure of gantry crawler crane | |
| CN216105745U (en) | A construction equipment for isolation bearing transportation and hoist and mount | |
| CN220977714U (en) | Construction device on suspension type steel box girder | |
| CN114134765B (en) | Rail beam supporting system and installation construction method |
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 |