Low-clearance loop chain segment crane

Abstract

The invention relates to a low-clearance loop chain segment crane which comprises a driving trolley arranged on a walking track, and the driving trolley serving as a power source can move along the walking track; the number of the driven trolleys is two, one of the driven trolleys is connected with the driving trolley, and the driving trolley drives the driven trolleys to move along the walking track; the lifting device is arranged between the two driven trolleys, and the lifting device is connected with the driven trolleys; and the duct piece lifting appliance is connected with the lifting device, the lifting device can drive the duct piece lifting appliance to ascend and descend in the vertical direction, and the duct piece lifting appliance is used for lifting duct pieces. According to the low-clearance loop chain segment crane, the driving trolley is connected with the driven trolley through the connecting device and transmits power through the connecting device, the driving trolley and the driven trolley are hung on the track and jointly bear the hoisting mechanism and the lifting appliance to run along the track, and the hoisting mechanism provides power for hoisting segments; the crane can run on a turning track and an uphill and downhill track, and can efficiently complete the hoisting of the duct piece.

Description

Technical Field

[0001] The invention relates to the technical field of hoisting and hoisting equipment, in particular to a low-clearance ring-chain segment crane. Background Art

[0002] With the rapid development of underground rail transit, the technology of shield construction is becoming more and more mature. The segment is the main assembly component of shield construction and the outermost barrier of the tunnel, which is responsible for resisting soil pressure, groundwater pressure and some special loads.

[0003] As an indispensable part of the shield machine, the segment crane is mainly used to lift the segments to the designated location for assembly.

[0004] During the use of the segment crane, the following shortcomings gradually emerged: 1) During the operation of the segment crane, due to the relatively narrow tunnel working space, the entire running track will have a certain slope, and there will be a certain turning angle when running in the horizontal direction. The current segment crane has difficulty adapting to the narrow space during horizontal turning, especially when accelerating, decelerating and climbing, and will swing. Excessive swing amplitude will cause interference between the segment and other shield structures, resulting in damage to the segment.

[0005] 2) The commonly used method of lifting pipe segments is to use a pipe segment crane plus a chain hoist structure. Two chain hoists hang a vacuum suction cup to lift the pipe segment (the vacuum suction cup is used to absorb the pipe segment). The vacuum suction cup absorbs the pipe segment in a way that the absorption is not firm and there is a certain risk of the pipe segment falling off, which seriously affects the safety of construction. Summary of the invention

[0006] To this end, the technical problem to be solved by the present invention is to overcome the problem in the prior art of how the segment crane can adapt to complex tracks in a small space and improve the stability of segment grabbing.

[0007] In order to solve the above technical problems, the present invention provides a low-clearance chain segment crane, comprising: an active trolley, which is arranged on a traveling track, and the active trolley can move along the traveling track as a power source; a driven trolley, which is provided in two, and the driven trolley is arranged on the traveling track, one of the driven trolleys is connected to the active trolley, and the active trolley drives the driven trolley to move along the traveling track; a lifting device, which is arranged between the two driven trolleys, and the lifting device is connected to the driven trolley; a segment hoist, which is connected to the lifting device, and the lifting device can drive the segment hoist to rise and fall in a vertical direction, and the segment hoist is used to lift the segments. The low-headroom chain segment crane of the present invention is mainly composed of several parts, such as an active trolley, a connecting device, a driven trolley, a lifting device and a hoisting device. The active trolley is connected to the driven trolley through the connecting device, and power is transmitted through the connecting device. The active trolley and the driven trolley are suspended on a track and jointly bear the responsibility of the lifting mechanism and the hoisting device running along the track. The lifting mechanism provides power for lifting the segment, and transmits torque to the hoisting device through a chain form to lift the segment.

[0008] In one embodiment of the present invention, the active trolley includes a first wall panel, a running motor, a driving gear, a gear set, a plurality of first traveling wheels, a plurality of first guide wheels and a first bolt shaft. The running motor, the gear set, a plurality of first traveling wheels, a plurality of first guide wheels and a first bolt shaft are all arranged on the first wall panel. The output end of the running motor is connected to the driving gear, the driving gear is meshed with the gear set, the gear set is meshed with the rack on the traveling track, the first traveling wheel is placed in a groove of the traveling track, and the first traveling wheel rolls along the groove of the traveling track, the first guide wheel is in contact with the side wall of the traveling track, and the first guide wheel rolls along the side wall of the traveling track, and the first bolt shaft is used to connect the driven trolley.

[0009] In one embodiment of the present invention, the driven trolley includes a second wall panel, a second bolt shaft, a third bolt shaft, a joint bearing, a plurality of second traveling wheels and a plurality of second guide wheels, the second bolt shaft, the third bolt shaft, a plurality of second traveling wheels and a plurality of second guide wheels are all arranged on the second wall panel, the joint bearing is sleeved on the third bolt shaft, the second bolt shaft is connected to the first bolt shaft through a connecting rod, the second traveling wheel is placed in a groove of a traveling track, and the second traveling wheel rolls along the groove of the traveling track, the second guide wheel is in contact with the side wall of the traveling track, and the second guide wheel rolls along the side wall of the traveling track, and the lifting device is connected to the joint bearing.

[0010] In one embodiment of the present invention, the lifting device includes a lifting frame, a lifting motor and a chain assembly, the lifting frame is connected to a driven trolley, the lifting motor and the chain assembly are both installed on the lifting frame, and the output end of the lifting motor is connected to the chain assembly, and the chain assembly is connected to a segment hoist.

[0011] In one embodiment of the present invention, the ring chain assembly includes a chain box, a driving sprocket shaft, a guide sprocket, a first lifting sprocket, a second lifting sprocket, a ring chain and an end fixing block, the driving sprocket shaft is connected to the rotating shaft of the lifting motor, one end of the ring chain is arranged in the chain box, and the other end of the ring chain is connected to the end fixing block, the ring chain is wrapped around the driving sprocket shaft, the guide sprocket, the first lifting sprocket and the second lifting sprocket, and the ring chain forms a first drooping section and a second drooping section, and the first drooping section and the second drooping section are connected to the segment hanger.

[0012] In one embodiment of the present invention, the segment hanger includes a hanger connection device, a hanger beam and two symmetrically arranged plug-in devices, the hanger connection device is arranged on the hanger beam, and the hanger connection device is located at the center of the hanger beam, the two symmetrically arranged plug-in devices are respectively arranged at both ends of the hanger beam, the hanger connection device is connected to the first drooping section and the second drooping section, and the plug-in device is inserted into the segment and used for lifting the segment.

[0013] In one embodiment of the present invention, the sling connecting device includes an upper sling beam, a cover plate, a connecting shaft, a bearing seat, a sprocket and a plurality of blocks, the connecting shaft is arranged at the center position of the upper sling beam, and the lower end of the connecting shaft is connected to the sling beam, the cover plate is locked on the upper sling beam by a fastener, bearing seats are arranged on the opposite side walls of the upper sling beam, two sprockets are arranged on the bearing seat, the first drooping section and the second drooping section correspond to the two sprockets one by one, and the first drooping section and the second drooping section are respectively wrapped around the corresponding sprockets, and blocks are arranged around the upper sling beam and the bearing seat.

[0014] In one embodiment of the present invention, a third axis is provided on the hanger beam, and the third axis is arranged perpendicular to the connecting axis. The lower end of the connecting axis extends out of the upper hanger beam, and the lower end of the connecting axis extending out of the upper hanger beam is provided with a first through hole, and the third axis passes through the first through hole.

[0015] In one embodiment of the present invention, the plug-in and pull-out device includes a lower mounting seat, a segment pin shaft, a base, a guide block, a locking handle, a push rod and a second connecting shaft. The lower mounting seat is fixedly arranged on the end of the hanger beam, the upper end of the segment pin shaft is arranged in the lower mounting seat, and the segment pin shaft can slide along the lower mounting seat, the end of the segment pin shaft located in the lower mounting seat is hinged to one end of the push rod, the base is fixedly arranged on the outer wall of the lower mounting seat, the guide block is arranged on the base through the second connecting shaft, the locking handle is arranged on the base, and the locking handle is used to lock the guide block, the end of the push rod extending out of the lower mounting seat passes through the guide block, the push rod is used to drive the segment pin shaft to extend or retract the lower mounting seat, and the push rod can drive the guide block to rotate.

[0016] In one embodiment of the present invention, a first limiting groove and a second limiting groove are provided on the outer wall of the guide block, and a bolt limiting rod is fixedly installed on the base. The bolt limiting rod is located in the first limiting groove or the second limiting groove to indicate that the segment pin shaft is extended or retracted into place.

[0017] The above technical solution of the present invention has the following beneficial effects compared with the prior art: The low-headroom chain segment crane described in the present invention has three suspended trolleys suspended on a track, and the active trolley drives the entire device to run on the track in a gear rack transmission manner. At the same time, the entire device can well realize uphill and downhill and small horizontal turns. In addition, the pin shafts at both ends of the hoist are connected to the positioning holes of the segment, and the segment is lifted by the lifting device; this segment crane can be used in small-diameter tunnels to solve the problem of limited space. The overall structure is compact and the low-headroom chain segment crane can minimize the vertical space occupancy and meet the construction needs of narrow spaces. This crane can run stably on turning and uphill tracks and can efficiently complete the lifting of the segment. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to make the content of the present invention more clearly understood, the present invention is further described in detail below according to specific embodiments of the present invention in conjunction with the accompanying drawings, wherein Figure 1 It is a structural schematic diagram of the application of a low-headroom chain segment crane in a preferred embodiment of the present invention; Figure 2 It is a structural schematic diagram of a low-headroom chain segment crane in a preferred embodiment of the present invention; Figure 3 This is a schematic diagram of the structure of the active vehicle in a preferred embodiment of the present invention; Figure 4 It is a structural schematic diagram of the driven trolley in a preferred embodiment of the present invention; Figure 5 It is a structural schematic diagram of a low-clearance chain segment crane when turning in a preferred embodiment of the present invention; Figure 6 In the preferred embodiment of the present invention Figure 5 A partial enlarged view of the M in the middle; Figure 7 It is a structural schematic diagram of a lifting device in a preferred embodiment of the present invention; Figure 8 It is a structural schematic diagram of the ring chain assembly in a preferred embodiment of the present invention; Fig. 9 It is a structural schematic diagram of a pipe segment hanger in a preferred embodiment of the present invention; Fig.10 It is a structural schematic diagram of a sling connection device in a preferred embodiment of the present invention; Fig.11 It is a cross-sectional view of a sling connection device in a preferred embodiment of the present invention; Fig.12 It is a structural schematic diagram of a hanger beam in a preferred embodiment of the present invention; Fig.13 It is a structural schematic diagram of the plugging and unplugging device in a preferred embodiment of the present invention; Fig.14 It is a structural schematic diagram of the plug-in device when it is extended in a preferred embodiment of the present invention; Fig.15 It is a structural schematic diagram of the plug-in device when it is retracted in the preferred embodiment of the present invention; Fig.16 It is a schematic diagram of the plugging and unplugging device in a preferred embodiment of the present invention.

[0019] Description of the accompanying drawings in the specification: active trolley 1, first wall panel 11, running motor 12, driving gear 13, gear set 14, first walking wheel 15, first guide wheel 16, first bolt shaft 17, driven trolley 2, second wall panel 21, second bolt shaft 22, third bolt shaft 23, joint bearing 24, second walking wheel 25, second guide wheel 26, lifting device 3, lifting frame 31, lifting motor 32, chain assembly 33, chain box 331, driving sprocket shaft 332, guide sprocket 333, first lifting sprocket 334, second lifting sprocket 335, chain 336, end fixing block 337, first drooping section 338, second drooping section 339, segment hanger 4, hanger connecting device 41, upper hanging beam 411, cover plate 412, connecting shaft 413, bearing seat 414 , sprocket 415, block 416, crossbeam 417, tapered roller bearing 418, spacer sleeve 419, self-lubricating bearing 4110, rotation limit plate 4111, hanger beam 42, third axis 421, first through hole 422, rotation limit sleeve 423, locking latch 424, baffle 425, bending portion 426, plug-in device 43, lower mounting seat 431, segment latch shaft 432, base 433, bolt limit rod 4330, limit groove 4331, guide block 434, first limit groove 4341, second limit groove 4342, first locking groove 4343, second locking groove 4344, guide sleeve 4345, locking handle 435, cylindrical rod 4351, push rod 436, second connecting shaft 437, walking guide rail 100, rack 101, segment 200. DETAILED DESCRIPTION

[0020] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it, but the embodiments are not intended to limit the present invention.

[0021] Reference Figure 1 , 2As shown, the low-headroom chain segment crane of the present invention comprises: an active trolley 1, a driven trolley 2, a lifting device 3 and a segment hanger 4; the active trolley 1 is arranged on a traveling track, and the active trolley 1 can move along the traveling track as a power source; the driven trolley 2 is provided in two numbers, and the driven trolley 2 is arranged on the traveling track, one of the driven trolleys 2 is connected to the active trolley 1, and the active trolley 1 drives the driven trolley 2 to move along the traveling track; the lifting device 3 is arranged between the two driven trolleys 2, and the lifting device 3 is connected to the driven trolley 2; the segment hanger 4 is connected to the lifting device 3, and the lifting device 3 can drive the segment hanger 4 to rise and fall in the vertical direction, and the segment hanger 4 is used for lifting the segments.

[0022] Reference Figure 3 As shown, the active trolley 1 includes a first wall panel 11, a running motor 12, a driving gear 13, a gear set 14, a plurality of first walking wheels 15, a plurality of first guide wheels 16 and a first bolt shaft 17. The running motor 12, the gear set 14, the plurality of first walking wheels 15, the plurality of first guide wheels 16 and the first bolt shaft 17 are all arranged on the first wall panel 11. The output end of the running motor 12 is connected to the driving gear 13, the driving gear 13 is meshed with the gear set 14, the gear set 14 is meshed with the rack on the walking track, the first walking wheel 15 is placed in the groove of the walking track, and the first walking wheel 15 rolls along the groove of the walking track, the first guide wheel 16 is in contact with the side wall of the walking track, and the first guide wheel 16 rolls along the side wall of the walking track, and the first bolt shaft 17 is used to connect the driven trolley 2.

[0023] Reference Figure 4-6As shown, the driven trolley 2 includes a second wall panel 21, a second bolt shaft 22, a third bolt shaft 23, a joint bearing 24, a plurality of second running wheels 25 and a plurality of second guide wheels 26. The second bolt shaft 22, the third bolt shaft 23, a plurality of second running wheels 25 and a plurality of second guide wheels 26 are all arranged on the second wall panel 21. The joint bearing 24 is sleeved on the third bolt shaft 23. The second bolt shaft 22 is connected to the first bolt shaft 17 through a connecting rod. The second running wheel 25 is placed in the groove of the running track and the second running wheel 25 rolls along the groove of the running track. The second guide wheel 26 contacts the side wall of the running track and the second guide wheel 26 rolls along the side wall of the running track. The lifting device 3 is connected to the joint bearing 24. It is set as two driven trolleys 2, both of which are linked to the lifting device 3. The two driven trolleys 2 are suspended on the running track 100 by eight second running wheels 25 to drive the lifting device 3 to move on the running track 100. The two driven trolleys 2 are connected to the lifting device 3 through the joint bearing 24 on the third bolt shaft 23. The joint bearing 24 is connected in a manner that allows the driven trolley 2 and the lifting device 3 to rotate relative to each other at an angle of θ, thereby preventing the low-clearance chain segment crane from getting stuck during operation and better adapting to complex operating environments.

[0024] Reference Figure 7 As shown, the lifting device 3 includes a lifting frame 31, a lifting motor 32 and a chain assembly 33. The lifting frame 31 is connected to the driven trolley 2. The lifting motor 32 and the chain assembly 33 are both installed on the lifting frame 31, and the output end of the lifting motor 32 is connected to the chain assembly 33. The chain assembly 33 is connected to the segment hanger 4. The lifting device 3 is powered by two lifting motors 32. The two lifting motors 32 drive the chain assembly 33 to drive the segment hanger 4 to lift the segment 200. The two lifting motors 32 are arranged diagonally on both sides of the lifting frame 31, so that the lifting mechanism can be effectively balanced during the lifting of heavy objects.

[0025] Reference Figure 8 As shown, the ring chain assembly 33 includes a chain box 331, a driving sprocket shaft 332, a guide sprocket 333, a first lifting sprocket 334, a second lifting sprocket 335, a ring chain 336 and an end fixing block 337, the driving sprocket shaft 332 is connected to the rotating shaft of the lifting motor 32, one end of the ring chain 336 is arranged in the chain box 331, and the other end of the ring chain 336 is connected to the end fixing block 337, the ring chain 336 is wrapped around the driving sprocket shaft 332, the guide sprocket 333, the first lifting sprocket 334 and the second lifting sprocket 335, and the ring chain 336 forms a first drooping section 338 and a second drooping section 339, and the first drooping section 338 and the second drooping section 339 are connected to the pipe segment hanger 4.

[0026] Reference Fig. 9 As shown, the pipe segment hanger 4 includes a hanger connection device 41, a hanger beam 42 and two symmetrically arranged plug-in devices 43. The hanger connection device 41 is arranged on the hanger beam 42 and is located at the center of the hanger beam 42. The two symmetrically arranged plug-in devices 43 are respectively arranged at the two ends of the hanger beam 42. The hanger connection device 41 is connected to the first drooping section 338 and the second drooping section 339. The plug-in devices 43 are inserted into the pipe segment and used for lifting the pipe segment. The pipe segment hanger is mainly divided into three parts, namely the hanger connection device 41, the hanger beam 42 and two symmetrically arranged plug-in devices 43. The hanger connection device 41 is mainly used to connect the upper lifting device 3 and the lower hanger beam 42.

[0027] Reference Fig.10 , 11 As shown, the sling connecting device 41 includes an upper sling beam 411, a cover plate 412, a connecting shaft 413, a bearing seat 414, a sprocket 415 and a plurality of blocks 416, the connecting shaft 413 is arranged at the center position of the upper sling beam 411, and the lower end of the connecting shaft 413 is connected to the sling beam 42, the cover plate 412 is locked on the upper sling beam 411 by fasteners, bearing seats 414 are arranged on the opposite side walls of the upper sling beam 411, two sprockets 415 are arranged on the bearing seat 414, the first drooping section 338 and the second drooping section 339 correspond to the two sprockets 415 one by one, and the first drooping section 338 and the second drooping section 339 are respectively wrapped around the corresponding sprockets 415, and the upper sling beam 411 and the bearing seat 414 are provided with blocks 416 around them. The center of the upper suspension beam 411 is provided with a crossbeam 417, on which a thrust tapered roller bearing 418 is installed, the connecting shaft 413 is connected to the inner ring of the thrust tapered roller bearing 418, a spacer sleeve 419 is provided on the connecting shaft 413, and a self-lubricating bearing 4110 is provided between the spacer sleeve 419 and the crossbeam 417. The bearing seat 414 is installed on the left and right sides of the upper suspension beam 411, and two sprockets 415 are installed on one side of the upper suspension beam 411 and the bearing seat 414, and Figure 8 The first drooping section 338 and the second drooping section 339 are wound around to lift the segment 200. Six stoppers 416 are arranged on the bearing seat 414 and the upper suspension beam 411, and their main function is to prevent the lower mechanism from colliding with them. The shaft, the cross beam and the cover plate are components connecting the upper suspension beam 411 and the hanger beam 42.

[0028] The load of the hanger beam 42 and the segment 200 is transferred to the crossbeam 417 through the shaft. The crossbeam 417 is equipped with a thrust tapered roller bearing 418, and the connecting shaft 413 can rotate and bear the axial load at the same time. A self-lubricating bearing 4110 is installed under the crossbeam 417, which solves the problem of inconvenient oil injection and lubrication, and can improve working conditions. The upper cover plate 412 can prevent external dust and mechanical grinding debris from entering the interior and damaging the bearing, and also plays a role in fixing the crossbeam 417 to prevent it from axial movement and left and right shaking, thereby ensuring the stability of the lifting process.

[0029] Reference Fig.12 As shown, the hanger beam 42 is provided with a third shaft 421, and the third shaft 421 is arranged perpendicularly to the connecting shaft 413. The lower end of the connecting shaft 413 extends out of the upper hanger beam 411, and the lower end of the connecting shaft 413 extending out of the upper hanger beam 411 is provided with a first through hole 422, and the third shaft 421 passes through the first through hole 422. Baffles 425 are installed on both sides of the hanger beam 42, and the third shaft 421 is arranged at the end position of the hanger beam 42 by the baffles 425. The third shaft 421 is installed on the hanger beam 42 and fixed by two baffles 425. The holed connecting shaft 413 of the upper hanger is connected to the third shaft 421 to connect the lower hanger device. The lower hanger device is a direct contact device for lifting the pipe segment by the low clearance chain segment crane, and the two plug-in devices 43 are connected to the positioning holes of the pipe segment 200 to lift the pipe segment 200. The two plug-in and pull-out devices 43 are also installed in a diagonal manner, so that the sling can be balanced left and right; if they are installed on the same side, a counterweight block needs to be installed on the other side, which will increase the weight of the entire structure.

[0030] In the above structure, a rotation limit plate 4111 is provided on the upper suspension beam 411, and a rotation limit sleeve 423 is provided on the sling beam 42. A locking latch 424 is provided between the rotation limit plate 4111 and the rotation limit sleeve 423. The rotation limit plate 4111 is rotated to the position of the rotation limit sleeve 423, and the locking latch 424 is inserted between the rotation limit plate 4111 and the rotation limit sleeve 423, so that the upper suspension beam 411 and the sling beam 42 can be fixed to prevent the upper suspension beam 411 and the sling beam 42 from rotating relative to each other. The locking latch 424 can prevent the upper suspension beam 411 and the sling beam 42 from rotating relative to each other under certain conditions. When the locking latch 424 is inserted into the positioning hole, the upper suspension beam 411 and the sling beam 42 cannot rotate. When the position of the lower sling beam 42 needs to be adjusted, the locking latch 424 can be pulled out.

[0031] Reference Figure 13-16As shown, the plug-in device 43 includes a lower mounting seat 431, a pipe segment plug shaft 432, a base 433, a guide block 434, a locking handle 435, a push rod 436 and a second connecting shaft 437. The lower mounting seat 431 is fixedly arranged on the end of the hanger beam 42, and the upper end of the pipe segment plug shaft 432 is arranged in the lower mounting seat 431, and the pipe segment plug shaft 432 can slide along the lower mounting seat 431. The end of the pipe segment plug shaft 432 located in the lower mounting seat 431 is hinged with one end of the push rod 436. Then, the base 433 is fixedly arranged on the outer wall of the lower mounting seat 431, the guide block 434 is arranged on the base 433 through the second connecting shaft 437, the locking handle 435 is arranged on the base 433, and the locking handle 435 is used to lock the guide block 434, the end of the push rod 436 extending from the lower mounting seat 431 passes through the guide block 434, the push rod 436 is used to drive the segment latch shaft 432 to extend or retract the lower mounting seat 431, and the push rod 436 can drive the guide block 434 to rotate. The two ends of the hanger beam 42 in the length direction are arranged as upward bending parts 426, that is, the bending parts 426 are upwardly tilted, and the lower mounting seat 431 is installed on the bending parts 426, so that the plug-in devices 43 at both ends are arranged in an outer "eight" shape. Through the above arrangement, the two segment latch shafts 432 are arranged in an outer "eight" shape. When the push rod 436 is turned, the segment latch shaft 432 extends into the through hole of the segment. The through hole of the segment is set at the same inclination angle as the segment latch shaft 432. At this time, the segment latch shaft 432 is gradually inserted into the through hole of the segment along the inclination angle. After the segment latch shaft 432 is inserted into the through hole of the segment, the lifting device 3 lifts the segment hoist 4 upward along the vertical direction. Since the segment latch shaft 432 is stuck in the through hole of the segment, it drives the segment to move upward to achieve lifting.

[0032] Reference Fig.16As shown, the outer wall of the guide block 434 is provided with a first limiting groove 4341 and a second limiting groove 4342, and a bolt limiting rod 4330 is fixedly installed on the base 433. The bolt limiting rod 4330 is located in the first limiting groove 4341 or the second limiting groove 4342 to indicate that the segment pin shaft 432 is extended or retracted to a certain position. The first limiting groove 4341 and the second limiting groove 4342 are connected. When the guide block 434 is rotated, the first limiting groove 4341 and the second limiting groove 4342 can reach the position of the bolt limiting rod 4330 respectively. The first limiting groove 4341 is the D position in the figure, and the second limiting groove 4342 is the E position in the figure. The base 433 is provided with a limit groove 4331, and the limit groove 4331 is set in a "V" shape. The two end positions of the limit groove 4331 are set to position A and position B respectively. The locking handle 435 is provided with a cylindrical rod 4351. When the locking handle 435 is pulled to place the cylindrical rod 4351 in position A, the rotating guide block 434 is in an unlocked state at this time, and the pushing rod 436 can drive the rotating guide block 434 to rotate. The outer wall of the rotating guide block 434 is provided with a first locking groove 4343 and a second locking groove 4344. The first locking groove 4343 is in position F, and the second locking groove 4344 is in position B. When the first locking groove 4343 and the second locking groove 4344 coincide with the B position respectively, the locking handle 435 is pushed to place the cylindrical rod 4351 in position B, thereby realizing the locking of the rotating guide block 434. A guide sleeve 4345 is provided on the rotating guide block 434 . The push rod 436 is a cylindrical rod. The push rod 436 penetrates the guide sleeve 4345 , and the push rod 436 can slide in the guide sleeve 4345 .

[0033] The plug-in and pull-out device 43 is composed of a lower mounting seat 431, a segment pin shaft 432, a base 433, a guide block 434, a locking handle 435, a push rod 436, and a second connecting shaft 437. The push rod 436 can move axially in the guide hole of the guide block 434, and the interference between the end of the push rod 436 and the lower mounting seat 431 is avoided by axial displacement. When the push rod 436 is lifted up or pressed down, the guide block 434 swings up and down around the second connecting shaft 437. When the push rod 436 is lifted up, the segment pin shaft 432 moves downward and is inserted into the positioning hole of the segment 200. After the guide block D contacts the bolt limit rod 4330, the pin shaft stops moving downward. At this time, the locking handle 435 can be pushed to place the cylindrical rod 4351 in the B position, and the entire device will be in a locked state, and the push rod 436 cannot be rotated up and down. When the locking handle 435 is pulled and the cylindrical rod 4351 is placed in position A, the entire device is unlocked, and the push rod 436 can be pressed downward to pull the segment latch shaft 432 out of the positioning hole of the segment 200. After the guide block position E contacts the bolt limit rod 4330, the guide block 434 stops rotating and the segment latch shaft 432 stops moving upward. The push rod 436 can be pushed again to place the cylindrical rod 4351 in position B of the base. At this time, the guide block 434 position C is also in position B, so the entire device can be locked again to prevent the segment latch shaft 432 from colliding with the lower segment.

[0034] Obviously, the above embodiments are merely examples for clear explanation and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from these are still within the protection scope of the invention.

Claims

1. A low clearance chain segment crane, characterized in that: include: An active trolley is arranged on the running track and can move along the running track as a power source; There are two driven trolleys, and the driven trolleys are arranged on the running track, one of the driven trolleys is connected to the driving trolley, and the driving trolley drives the driven trolley to move along the running track; A lifting device is arranged between the two driven trolleys and is connected to the driven trolleys; The segment hanger is connected to the lifting device, and the lifting device can drive the segment hanger to rise and fall in the vertical direction. The segment hanger is used to hang the segment.

2. The low headroom chain segment crane according to claim 1, characterized in that: The active trolley includes a first wall panel, a running motor, a driving gear, a gear set, a plurality of first traveling wheels, a plurality of first guide wheels and a first bolt shaft. The running motor, the gear set, a plurality of first traveling wheels, a plurality of first guide wheels and a first bolt shaft are all arranged on the first wall panel. The output end of the running motor is connected to the driving gear, the driving gear is meshed with the gear set, the gear set is meshed with the rack on the traveling track, the first traveling wheel is placed in a groove of the traveling track, and the first traveling wheel rolls along the groove of the traveling track, the first guide wheel is in contact with the side wall of the traveling track, and the first guide wheel rolls along the side wall of the traveling track, and the first bolt shaft is used to connect the driven trolley.

3. The low headroom chain segment crane according to claim 2, characterized in that: The driven trolley includes a second wall panel, a second bolt shaft, a third bolt shaft, a joint bearing, a plurality of second traveling wheels and a plurality of second guide wheels. The second bolt shaft, the third bolt shaft, the plurality of second traveling wheels and the plurality of second guide wheels are all arranged on the second wall panel. The joint bearing is sleeved on the third bolt shaft. The second bolt shaft is connected to the first bolt shaft through a connecting rod. The second traveling wheel is placed in a groove of the traveling track, and the second traveling wheel rolls along the groove of the traveling track. The second guide wheel contacts the side wall of the traveling track, and the second guide wheel rolls along the side wall of the traveling track. The lifting device is connected to the joint bearing.

4. The low headroom chain segment crane according to claim 1, characterized in that: The lifting device includes a lifting frame, a lifting motor and a chain assembly. The lifting frame is connected to a driven trolley. The lifting motor and the chain assembly are both installed on the lifting frame. The output end of the lifting motor is connected to the chain assembly. The chain assembly is connected to a segment hoist.

5. The low headroom chain segment crane according to claim 4, characterized in that: The ring chain assembly includes a chain box, a driving sprocket shaft, a guide sprocket, a first lifting sprocket, a second lifting sprocket, a ring chain and an end fixing block. The driving sprocket shaft is connected to the rotating shaft of the lifting motor. One end of the ring chain is arranged in the chain box, and the other end of the ring chain is connected to the end fixing block. The ring chain is wrapped around the driving sprocket shaft, the guide sprocket, the first lifting sprocket and the second lifting sprocket, and the ring chain forms a first drooping section and a second drooping section. The first drooping section and the second drooping section are connected to the segment hanger.

6. The low headroom chain segment crane according to claim 5, characterized in that: The segment hanger includes a hanger connecting device, a hanger beam and two symmetrically arranged plug-in and pull-out devices. The hanger connecting device is arranged on the hanger beam and is located at the center of the hanger beam. The two symmetrically arranged plug-in and pull-out devices are respectively arranged at both ends of the hanger beam. The hanger connecting device is connected to the first drooping section and the second drooping section. The plug-in and pull-out devices are inserted into the segment and used for lifting the segment.

7. The low headroom chain segment crane according to claim 6, characterized in that: The sling connecting device includes an upper sling beam, a cover plate, a connecting shaft, a bearing seat, a sprocket and a plurality of blocks. The connecting shaft is arranged at the center position of the upper sling beam, and the lower end of the connecting shaft is connected to the sling beam. The cover plate is locked on the upper sling beam by fasteners. Bearing seats are arranged on the opposite side walls of the upper sling beam. Two sprockets are arranged on the bearing seats. The first drooping section and the second drooping section correspond to the two sprockets one by one, and the first drooping section and the second drooping section are respectively wrapped around the corresponding sprockets. Blocks are arranged around the upper sling beam and the bearing seat.

8. The low headroom chain segment crane according to claim 7, characterized in that: A third shaft is provided on the hanger beam, and the third shaft is arranged perpendicular to the connecting shaft. The lower end of the connecting shaft extends out of the upper hanging beam, and the lower end of the connecting shaft extending out of the upper hanging beam is provided with a first through hole, and the third shaft passes through the first through hole.

9. The low headroom chain segment crane according to claim 6, characterized in that: The plug-in and pull-out device includes a lower mounting seat, a segment pin shaft, a base, a guide block, a locking handle, a push rod and a second connecting shaft. The lower mounting seat is fixedly arranged on the end of the hanger beam, the upper end of the segment pin shaft is arranged in the lower mounting seat, and the segment pin shaft can slide along the lower mounting seat, the end of the segment pin shaft located in the lower mounting seat is hinged to one end of the push rod, the base is fixedly arranged on the outer wall of the lower mounting seat, the guide block is arranged on the base through the second connecting shaft, the locking handle is arranged on the base, and the locking handle is used to lock the guide block, the end of the push rod extending out of the lower mounting seat passes through the guide block, the push rod is used to drive the segment pin shaft to extend or retract the lower mounting seat, and the push rod can drive the guide block to rotate.

10. The low headroom chain segment crane according to claim 9, characterized in that: The outer wall of the guide block is provided with a first limiting groove and a second limiting groove, and the base is fixedly installed with a bolt limiting rod, which is located in the first limiting groove or the second limiting groove to indicate that the segment pin shaft is extended or retracted into place.

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