Automatic hoisting method for large-diameter shield segment

Abstract

The invention relates to the technical field of shield segments, and discloses an automatic hoisting method for a large-diameter shield segment, which comprises the following steps: moving a turnover mechanism to one side of a transport vehicle and clamping the turnover mechanism with the transport vehicle; the overturning plate in the horizontal posture extends into a gap between the outer cambered surface of the shield segment and the carrying plate, and extends into a hole in the outer cambered surface through a second hydraulic telescopic rod, so that limiting connection between the overturning plate and the shield segment is formed; the crank driving mechanism drives the crank to rotate so as to drive the overturning plate and the shield segment to rotate to a vertical posture; after the shield segment is received through the support, connection between the shield segment and the turnover mechanism is removed; and finally, the shield segment is hoisted through the hoisting mechanism. The device has the advantages that the automation degree and the working efficiency in the whole overturning process are high; and the hoisting mechanism can realize quick connection and hoisting through holes in the outer cambered surface and the top end surface of the shield segment.

Description

Technical Field

[0001] The invention belongs to the technical field of shield segments, and in particular relates to an automatic hoisting method for large-diameter shield segments. Background Art

[0002] The shield segment is the outermost barrier of a tunnel or shaft, and is responsible for resisting soil pressure, groundwater pressure and some special loads.

[0003] After the shield segments are produced on the assembly line, the finished segments are demoulded, placed for natural cooling, transported to a water curing pool for curing, transported to a finished product yard for curing, turned over for type testing, turned over and loaded onto trucks for transportation to the subway construction site for use. During this period, the shield segments need to be hoisted many times, and the posture of the shield segments needs to be adjusted from a horizontal position with the inner arc facing downward to a vertical position, then adjusted to a horizontal position with the inner arc facing downward for testing, and then adjusted to a supine position with the inner arc facing upward, and then hoisted and loaded onto trucks for transportation.

[0004] For large-diameter shield segments, in addition to their huge size, their own weight is also large. Therefore, when the large-diameter shield segments are loaded onto trucks and transported to the construction site for assembly, there are great construction difficulties in turning them over and lifting them. Currently, the more common method is to use a lifting mechanism to suspend and turn them over, then put them upright on the ground, and then re-lift and install them so that they can be lifted to the designated position for assembly. This has the problem of cumbersome operation and the lifting mechanism needs to replace the lifting connection many times. Summary of the invention

[0005] The purpose of the present invention is to provide an automated lifting method for large-diameter shield segments based on the above-mentioned deficiencies in the prior art. The lifting method adopts a flipping mechanism and a lifting mechanism. The flipping mechanism is used to flip the shield segments on the transport vehicle from a horizontal state to a numerical state, and then the lifting mechanism is used to connect the outer arc surface and the top end surface of the shield segment to achieve rapid lifting.

[0006] The purpose of the present invention is achieved by the following technical solutions: An automated hoisting method for a large-diameter shield segment, the hoisting method comprising the following steps: S1: A transport vehicle carries a prefabricated shield segment to a designated location on a construction site. The shield segment is in a horizontal position on a loading plate of the transport vehicle and supported by two wooden sticks. The horizontal position means that the outer arc surface of the shield segment faces the loading plate. Two outer arc surface holes are formed on the outer arc surface of the shield segment, and a vertical hole is formed on the top surface of the shield segment. S2: Move the flipping mechanism to one side of the transport vehicle; The flipping mechanism includes a moving frame, a flipping plate and a crank driving mechanism, wherein the moving frame is composed of a low frame body located at the front and a high frame body located at the rear; two longitudinal guide rails are fixedly provided on both side edges of the bottom surface of the flipping plate, a bearing is provided on the top surface of the high frame body and a hinge shaft is provided in the bearing, a sliding kit is fixedly provided on the hinge shaft, the sliding kit and the hinge shaft are an integral structure, and the sliding kit is slidably assembled on the guide rails; the crank driving mechanism is in two groups and is symmetrically arranged on both sides of the moving frame, and the crank driving mechanism includes a first hydraulic telescopic rod and a crank The crank is composed of a straight handle segment and a ">"-shaped segment, a rotating shaft is provided at the connection position between the straight handle segment and the ">"-shaped segment, and the rotating shaft is fixed to the elevated body; one end of the crank is hinged to the rotating support at the rear of the bottom surface of the flip plate, and the other end of the crank is hinged to the telescopic end of the first hydraulic telescopic rod, and the rear seat end of the first hydraulic telescopic rod is hinged to the low frame; a second hydraulic telescopic rod is pre-embedded on the top surface of the flip plate, and two outer arc surface holes are provided on the outer arc surface of the shield segment, and the second hydraulic telescopic rod is controlled to extend so as to enter the outer arc surface hole for assembly; S3: moving the lower frame of the mobile frame to below the loading plate of the transport vehicle, and extending the flip plate in a horizontal position into the gap between the outer arc surface of the shield segment and the loading plate, aligning the second hydraulic telescopic rod embedded on the flip plate with the outer arc surface hole on the shield segment, and then controlling the second hydraulic telescopic rod to extend into the outer arc surface hole to form a limit connection between the flip plate and the shield segment; S4: The crank is driven to rotate by the crank driving mechanism to drive the rotation of the flip plate. The hinge shaft on the elevated body and the sliding kit that slides with the guide track on the flip plate provide support for the rotation of the flip plate and limit the rotation path. When the flip plate drives the shield segment to rotate to a vertical posture, the rotation is stopped. The bracket with moving and lifting functions on the ground is moved to the mobile frame, and the bracket is controlled to rise to the bottom surface height of the shield segment, so that the shield segment is seated on the bracket for support. S5: When the shield segment is placed on the bracket in a vertical posture, the second hydraulic telescopic rod is controlled to retract, and the bracket is controlled to move outward to release the connection between the mobile frame and the shield segment; S6: Use a lifting mechanism to lift the shield segment in a vertical posture; the lifting mechanism includes a crane and a lifting device, the crane lifts the lifting device through a steel cable, the lifting device includes a horizontal frame and a vertical frame fixedly connected to each other, the horizontal frame is provided with a vertical third hydraulic telescopic rod, the top surface of the shield segment is provided with a vertical hole, the third hydraulic telescopic rod is controlled to extend to enter the vertical hole; two horizontal fourth hydraulic telescopic rods are provided on the vertical frame, the fourth hydraulic telescopic rod is controlled to extend to enter the outer arc surface hole on the shield segment, so as to form a locking of the shield segment by the lifting device.

[0007] A slide rail is provided on the top of the low frame, and a fifth hydraulic telescopic rod is slidably mounted on the slide rail. When the low frame moves under the cargo board of the transport vehicle, the position of the fifth hydraulic telescopic rod on the slide rail is adjusted and the fifth hydraulic telescopic rod is driven to press against the bottom surface of the cargo board to form a clamping connection between the mobile frame and the transport vehicle.

[0008] Two rows of the second hydraulic telescopic rods are pre-buried in the longitudinal direction on the top surface of the flip plate, so as to control the corresponding second hydraulic telescopic rods to enter the outer arc surface hole for assembly according to the length of the flip plate extending below the outer arc surface of the shield segment.

[0009] The advantages of the present invention are as follows: the turning mechanism can realize automatic turning of the horizontal shield segment from the transport vehicle to the ground support and change it into a vertical position, and the whole turning process has a high degree of automation and work efficiency; the lifting mechanism can realize rapid connection and lifting through the holes on the outer arc surface and the top end surface of the shield segment; and the fifth hydraulic telescopic rod with a slidable position adjustment installed on the mobile frame can realize the top tightening and limiting between the shield segment and the transport vehicle, thereby avoiding overturning when turning over the shield segment. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a schematic diagram of the flip mechanism of the present invention in which the flip plate is in a horizontal posture; Figure 2 It is a schematic diagram of the flip mechanism of the present invention in which the flip plate is in a rotating and tilting state; Figure 3 It is a schematic diagram of the flip mechanism of the present invention in which the flip plate is in a vertical posture; Figure 4 It is a schematic diagram of the turning mechanism in the present invention moving away from the shield segment; Figure 5 It is a cross-sectional view of the turning plate extending between the outer arc surface of the shield segment and the loading plate in the present invention; Figure 6It is a cross-sectional view of the second hydraulic telescopic rod on the flip plate of the present invention extending into the outer arc hole of the shield segment; Figure 7 is a cross-sectional view of the flip plate in the present invention; Figure 8 For the present invention Figure 7 AA view in; Fig. 9 It is a schematic diagram of the lifting mechanism of the present invention lifting the pipe segment.

[0011] like Figure 1-9 , the marks in the figure are: Shield segment 1, outer arc surface hole 11, vertical hole 12; Carrying plate 2, wooden stick 3; Flip plate 4, guide rail 41, second hydraulic telescopic rod 42, sliding kit 43, rotating support 44; Mobile frame 5, low frame body 51, high frame body 52, hinge shaft 53, slide rail 54, fifth hydraulic telescopic rod 55; Crank drive mechanism 6, straight handle segment 61, ">"-shaped segment 62, first hydraulic telescopic rod 63; Bracket 7; Lifting device 8, vertical frame 81, horizontal frame 82, lifting lug 83, fourth hydraulic telescopic rod 84, third hydraulic telescopic rod 85. DETAILED DESCRIPTION

[0012] The features of the present invention and other related features are further described in detail below through embodiments in conjunction with the accompanying drawings to facilitate understanding by those skilled in the art: Example: Figure 1 , 2 As shown in , 3, 4, 5, 6, 7, 8, and 9, this embodiment specifically relates to an automated hoisting method for a large-diameter shield segment, and the hoisting method comprises the following steps: (S1) A transport vehicle carries the prefabricated shield segment 1 to a designated location on the construction site. The shield segment 1 is in a horizontal position on a loading plate 2 of the transport vehicle and is supported by two wooden sticks 3. The horizontal position means that the outer arc surface of the shield segment 1 faces the loading plate 2. Two outer arc surface holes 11 are provided on the outer arc surface of the shield segment 1, and a vertical hole 12 is provided on the top end surface of the shield segment 1.

[0013] (S2) Move the flipping mechanism to one side of the transport vehicle, wherein the flipping mechanism includes a moving frame 5, a flipping plate 4 and a crank drive mechanism 6.

[0014] The mobile frame 5 is composed of a low frame 51 located at the front and an elevated frame 52 located at the rear. The overall height of the low frame 51 is relatively low to facilitate its entry under the loading board 2 of the transport vehicle. The overall height of the elevated frame 52 is higher than the low frame 51, and the top surface height of the elevated frame 52 is flush with the top surface height of the loading board 2 of the transport vehicle. A slide rail 54 is provided on the top surface of the low frame 51. The slide rail 54 is arranged in the longitudinal direction. A fifth hydraulic telescopic rod 55 is slidably mounted on the slide rail 54. After the low frame 51 is inserted under the loading board 2 of the transport vehicle, the fifth hydraulic telescopic rod 55 is slid to a suitable position and then controlled to lift up to support the loading board 2, thereby realizing a clamping and limiting relationship between the mobile frame 5 and the loading board 2. Subsequently, in the process of flipping the shield segment 1, a rollover accident can be avoided.

[0015] The flip plate 4 is a steel plate structure with a certain thickness, which is used to connect with the shield segment 1 and flip. Two longitudinal guide rails 41 are embedded on both sides of the bottom surface of the flip plate 4. The guide rails 41 are convex-shaped, and a sliding kit 43 is slidably mounted on the guide rails 41; a bearing is provided on the top surface of the elevated body 52, and a hinge shaft 53 is provided in the bearing. The hinge shaft 53 is fixedly connected with the sliding kit 43 and forms an integral structure. A rotating support 44 is provided at the rear of the bottom surface of the flip plate 4. When the crank drive mechanism 6 is connected to the rotating support 44 and drives the flip plate 4 to rotate, the sliding kit 43 slides on the guide rails 41 of the flip plate 4 and the corresponding sliding kit 43 also rotates accordingly. The rotation of the sliding kit 43 is supported by the hinge shaft 53. It should be noted that a plurality of second hydraulic telescopic rods 42 arranged longitudinally are pre-buried on the top surface of the flip plate 4, and two outer arc surface holes 11 are provided on the outer arc surface of the shield segment 1. By controlling the extension of the second hydraulic telescopic rods 42 to enter the outer arc surface holes 11 and form a locking limit for the shield segment 1, when the shield segment 1 is driven to flip along with the flip plate 4, the shield segment 1 will not slip due to the limiting effect of the second hydraulic telescopic rods 42.

[0016] There are two groups of crank drive mechanisms 6 and they are symmetrically arranged on both sides of the mobile frame 5. The crank drive mechanism 6 includes a first hydraulic telescopic rod 63 and a crank. The crank is composed of a straight handle segment 61 and a “>” type segment 62. The crank is Z-shaped as a whole and is an integrated structure. A rotating shaft is provided at the connecting position of the straight handle segment 61 and the “>” type segment 62, and the rotating shaft is fixed on the elevated body 52; one end of the crank is hinged to the rotating support 44 at the rear part of the bottom surface of the flip plate 4, and the other end of the crank is hinged to the telescopic end of the first hydraulic telescopic rod 63, and the rear seat end of the first hydraulic telescopic rod 63 is hinged to the low frame 51. It should be noted that the setting height of the rotating shaft between the crank and the elevated body 52 is the same as the setting height of the hinged rotating shaft between the first hydraulic telescopic rod 63 and the low frame 51.

[0017] (S3) Move the low frame 51 of the mobile frame 5 to the bottom of the loading plate 2 of the transport vehicle, adjust the position of the fifth hydraulic telescopic rod 55 on the slide rail 54 and drive the fifth hydraulic telescopic rod 55 to press against the bottom surface of the loading plate 2 to form a clamping connection between the mobile frame 5 and the transport vehicle to avoid the overturning accident of the shield segment 1 when it is flipped later. Extend the flip plate 4 in a horizontal posture into the gap between the outer arc surface of the shield segment 1 and the loading plate 2, align the second hydraulic telescopic rod 42 embedded on the flip plate 4 with the outer arc hole 11 on the shield segment 1, and then control the second hydraulic telescopic rod 42 to extend into the outer arc hole 11 to form a limit connection between the flip plate 4 and the shield segment 1.

[0018] (S4) The crank is driven to rotate by the crank drive mechanism 6 to drive the rotation of the flip plate 4. The hinge shaft 53 on the elevated body 52 and the sliding kit 43 that slides with the guide track 41 on the flip plate 4 provide support for the rotation of the flip plate 4 and limit the rotation path. When the flip plate 4 drives the shield segment 1 to rotate to a vertical posture, the rotation is stopped. The bracket 7 with moving and lifting functions on the ground is moved to the mobile frame 5, and the bracket 7 is controlled to rise to the bottom surface height of the shield segment 1, so that the shield segment 1 is seated on the bracket 7 for support.

[0019] ( S5 ) When the shield segment 1 is placed on the bracket 7 in a vertical posture, the second hydraulic telescopic rod 42 is controlled to retract, and the bracket 7 is controlled to move outward to release the connection between the movable frame 5 and the shield segment 1 .

[0020] (S6) The shield segment 1 in a vertical posture is hoisted by a hoisting mechanism; the hoisting mechanism includes a crane and a hoist 8, the crane hoists the hoist 8 by a steel cable, the hoist 8 includes a horizontal frame 82 and a vertical frame 81 fixedly connected to each other, the horizontal frame 82 is provided with a vertical third hydraulic telescopic rod 85, a vertical hole 12 is opened on the top surface of the shield segment 1, and the third hydraulic telescopic rod 85 is controlled to extend so as to enter the vertical hole; two horizontal fourth hydraulic telescopic rods 84 are provided on the vertical frame, and the fourth hydraulic telescopic rods 84 are controlled to extend so as to enter the outer arc surface hole 11 on the shield segment 1, so as to form a locking of the shield segment 1 by the hoist 8.

[0021] The beneficial effects of this embodiment are as follows: the flipping mechanism can automatically flip the horizontal shield segment from the transport vehicle to the ground support and change it to a vertical position, and the entire flipping process has a high degree of automation and work efficiency; the lifting mechanism can achieve rapid connection and lifting through the holes on the outer arc surface and the top end surface of the shield segment; by installing a fifth hydraulic telescopic rod with a slidable position adjustable on the mobile frame, the top tightening limit between the transport vehicle can be achieved to avoid overturning when flipping the shield segment.

Claims

1. An automated hoisting method for large-diameter shield segments, characterized in that The hoisting method comprises the following steps: S1: A transport vehicle carries a prefabricated shield segment to a designated location on a construction site. The shield segment is in a horizontal position on a loading plate of the transport vehicle and supported by two wooden sticks. The horizontal position means that the outer arc surface of the shield segment faces the loading plate. Two outer arc surface holes are formed on the outer arc surface of the shield segment, and a vertical hole is formed on the top surface of the shield segment. S2: Move the flipping mechanism to one side of the transport vehicle; The flipping mechanism includes a moving frame, a flipping plate and a crank driving mechanism, wherein the moving frame is composed of a low frame body located at the front and a high frame body located at the rear; two longitudinal guide rails are fixedly provided on both side edges of the bottom surface of the flipping plate, a bearing is provided on the top surface of the high frame body and a hinge shaft is provided in the bearing, a sliding kit is fixedly provided on the hinge shaft, the sliding kit and the hinge shaft are an integral structure, and the sliding kit is slidably assembled on the guide rails; the crank driving mechanism is in two groups and is symmetrically arranged on both sides of the moving frame, and the crank driving mechanism includes a first hydraulic telescopic rod and a crank The crank is composed of a straight handle segment and a ">"-shaped segment. A rotating shaft is provided at the connection position between the straight handle segment and the ">"-shaped segment, and the rotating shaft is fixed to the elevated body. One end of the crank is hinged to the rotating support at the rear of the bottom surface of the flip plate, and the other end of the crank is hinged to the telescopic end of the first hydraulic telescopic rod. The rear seat end of the first hydraulic telescopic rod is hinged to the low frame. A second hydraulic telescopic rod is pre-embedded on the top surface of the flip plate. Two outer arc surface holes are provided on the outer arc surface of the shield segment. The second hydraulic telescopic rod is controlled to extend so as to enter the outer arc surface hole for assembly. S3: moving the lower frame of the mobile frame to below the loading plate of the transport vehicle, and extending the flip plate in a horizontal position into the gap between the outer arc surface of the shield segment and the loading plate, aligning the second hydraulic telescopic rod embedded on the flip plate with the outer arc surface hole on the shield segment, and then controlling the second hydraulic telescopic rod to extend into the outer arc surface hole to form a limit connection between the flip plate and the shield segment; S4: The crank is driven to rotate by the crank driving mechanism to drive the rotation of the flip plate. The hinge shaft on the elevated body and the sliding kit that slides with the guide track on the flip plate provide support for the rotation of the flip plate and limit the rotation path. When the flip plate drives the shield segment to rotate to a vertical posture, the rotation is stopped. The bracket with moving and lifting functions on the ground is moved to the mobile frame, and the bracket is controlled to rise to the bottom surface height of the shield segment, so that the shield segment is seated on the bracket for support. S5: When the shield segment is placed on the bracket in a vertical posture, the second hydraulic telescopic rod is controlled to retract, and the bracket is controlled to move outward to release the connection between the mobile frame and the shield segment; S6: Use a lifting mechanism to lift the shield segment in a vertical posture; the lifting mechanism includes a crane and a lifting device, the crane lifts the lifting device through a steel cable, the lifting device includes a horizontal frame and a vertical frame fixedly connected to each other, the horizontal frame is provided with a vertical third hydraulic telescopic rod, the top surface of the shield segment is provided with a vertical hole, the third hydraulic telescopic rod is controlled to extend to enter the vertical hole; two fourth horizontal hydraulic telescopic rods are provided on the vertical frame, the fourth hydraulic telescopic rod is controlled to extend to enter the outer arc surface hole on the shield segment, so as to lock the shield segment with the lifting device.

2. The method for automatically assembling a large diameter shield segment according to claim 1, characterized in that A slide rail is provided on the top of the low frame, and a fifth hydraulic telescopic rod is slidably mounted on the slide rail. When the low frame moves under the cargo board of the transport vehicle, the position of the fifth hydraulic telescopic rod on the slide rail is adjusted and the fifth hydraulic telescopic rod is driven to press against the bottom surface of the cargo board to form a clamping connection between the mobile frame and the transport vehicle.

3. The method for automatically assembling a large diameter shield segment according to claim 1, characterized in that Two rows of the second hydraulic telescopic rods are pre-buried in the longitudinal direction on the top surface of the flip plate, so as to control the corresponding second hydraulic telescopic rods to enter the outer arc surface hole for assembly according to the length of the flip plate extending below the outer arc surface of the shield segment.

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