Hoisting device for large-diameter shield segment

Abstract

The invention relates to the technical field of shield segments, and discloses a large-diameter shield segment hoisting device which comprises a turnover mechanism and a hoisting mechanism. The turnover mechanism comprises a movable frame, a turnover plate and a crank driving mechanism, the turnover plate extends into a gap between the shield segment and a loading plate of the transport vehicle in a horizontal posture and is connected with the outer arc surface of the shield segment, and the crank driving mechanism drives the turnover plate to rotate, so that the shield segment reaches a vertical state; the lifting mechanism comprises a crane and a lifting appliance, the crane lifts the lifting appliance through a steel cable, the lifting appliance comprises a horizontal frame body and a vertical frame body which are fixedly connected with each other, and the lifting mechanism is used for lifting the shield segment in a vertical state to a mounting position. The device has the advantages that the automation degree and the working efficiency in the whole overturning process are high; in addition, the hoisting mechanism can achieve rapid connection and hoisting through holes in the outer arc face and the top end face of the shield segment.

Description

Technical Field

[0001] The invention belongs to the technical field of shield segments, and in particular relates to a hoisting device for a large-diameter shield segment. 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 a lifting device for a large-diameter shield segment based on the above-mentioned deficiencies of the prior art. The lifting device combines a flipping mechanism and a lifting mechanism. The flipping mechanism is used to flip the shield segment on the transport vehicle from a horizontal state to a numerical state, and then the lifting mechanism is connected to 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: A hoisting device for a large-diameter shield segment, the hoisting device comprising a turning mechanism and a hoisting mechanism; The flipping mechanism is used to flip the shield segment from a horizontal state on the transport vehicle to a vertical state on the ground support; the flipping mechanism includes a moving frame, a flipping plate and a crank drive mechanism, the moving frame is composed of a low frame body located at the front and an elevated 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 elevated frame 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 drive mechanism is in two groups and is symmetrically arranged on both sides of the moving frame, The crank drive mechanism comprises a first hydraulic telescopic rod and a crank, wherein 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 a 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; The hoisting mechanism is used to hoist the shield segment in a vertical state to the installation position and assemble it; the hoisting mechanism includes a crane and a hoist, the crane hoists the hoist by a steel cable, the hoist 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 so as 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 so as to enter the outer arc surface hole on the shield segment, so as to form a locking of the shield segment by the hoist.

[0007] A plurality of fifth hydraulic telescopic rods are fixedly arranged on the top surface of the low frame of the mobile frame, and the fifth hydraulic telescopic rods are driven to extend and tighten the bottom surface of the cargo plate of the transport vehicle to achieve a clamping connection between the mobile frame and the transport vehicle.

[0008] A slide rail is provided on the top of the low frame, and the bottom of the fifth hydraulic telescopic rod is slidably mounted on the slide rail. The position of the fifth hydraulic telescopic rod on the slide rail is adjusted to achieve a clamping connection with a suitable area on the bottom surface of the loading plate.

[0009] The top surface of the elevated body is flush with the top surface of the cargo loading plate of the transport vehicle.

[0010] The lying state of the shield segment on the transport vehicle means that the outer curved surface of the shield segment faces the loading plate of the transport vehicle, two wooden sticks are arranged between the outer curved surface of the shield segment and the loading plate to support the shield segment, and the flip plate when the flip mechanism is in a horizontal posture extends into the space between the outer curved surface of the shield segment and the loading plate.

[0011] 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.

[0012] The advantages of the present invention are: the flipping mechanism can automatically flip the horizontal shield segment from the transport vehicle to the ground support and change it into a vertical position, and the entire flipping process has a high degree of automation and work efficiency; in addition, 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. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] 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 6 It 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.

[0014] 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

[0015] 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 Figures , 3, 4, 5, 6, 7, 8 and 9, the present embodiment specifically relates to a lifting device for a large-diameter shield segment, which comprises a flipping mechanism and a lifting mechanism, wherein the flipping mechanism is used to flip the shield segment 1 from a horizontal state on a transport vehicle to a vertical state on a ground support 7, and the lifting mechanism is used to lift the shield segment 1 in a vertical state to an installation position and assemble it.

[0016] like Figure 1 , 2 As shown in Figures 3, 4, 5, 6, 7 and 8, the turning mechanism includes a moving frame 5, a turning plate 4 and a crank drive mechanism 6.

[0017] 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.

[0018] 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.

[0019] 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.

[0020] like Figure 1 , 2 As shown in Figures 3, 4, 5, 6, 7, and 8, the horizontal posture of the shield segment 1 on the transport vehicle means that the outer arc surface of the shield segment 1 faces the loading plate 2 of the transport vehicle, and two wooden sticks 3 are arranged between the outer arc surface of the shield segment 1 and the loading plate 2 to support the shield segment 1. The flip plate 4 on the flip mechanism in a horizontal posture extends into the space between the outer arc surface of the shield segment 1 and the loading plate 2, and according to the depth of the extension of the flip plate 4, the second hydraulic telescopic rod 42 at the corresponding position is controlled to extend into the shield segment 1.

[0021] like Figure 1 , 2As shown in Figures , 3, 4, 5, 6, 7, 8, and 9, the lifting mechanism is used to lift the vertical shield segment 1 to the installation position and assemble it; the lifting mechanism includes a crane and a lifting device 8, the crane lifts the lifting device 8 through a steel cable, the lifting device 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, and 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 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 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 lifting device 8.

[0022] like Figure 1 , 2 , 3, 4, 5, 6, 7, and 8, when the lifting device in this embodiment is used for work, the following steps are included: (S1) 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.

[0023] (S2) 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.

[0024] (S3) 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; finally, the shield segment 1 in a vertical posture is hoisted by using the hoisting mechanism.

[0025] 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; in addition, 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.

Claims

1. A hoisting device for large-diameter shield segments, characterized in that The hoisting device comprises a turning mechanism and a hoisting mechanism; The flipping mechanism is used to flip the shield segment from a horizontal state on the transport vehicle to a vertical state on the ground support; the flipping mechanism includes a moving frame, a flipping plate and a crank drive mechanism, the moving frame is composed of a low frame body located at the front and an elevated 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 elevated frame 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 drive mechanism is in two groups and is symmetrically arranged on both sides of the moving frame, The crank driving mechanism comprises a first hydraulic telescopic rod and a crank, wherein 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; The hoisting mechanism is used to hoist the shield segment in a vertical state to the installation position and assemble it; the hoisting mechanism includes a crane and a hoist, the crane hoists the hoist by a steel cable, the hoist 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 so as 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 so as to enter the outer arc surface hole on the shield segment, so as to form a locking of the shield segment by the hoist.

2. A large diameter shield segment hoisting device according to claim 1, characterized in that A plurality of fifth hydraulic telescopic rods are fixedly arranged on the top surface of the low frame of the mobile frame, and the fifth hydraulic telescopic rods are driven to extend and tighten the bottom surface of the cargo plate of the transport vehicle to achieve a clamping connection between the mobile frame and the transport vehicle.

3. A large diameter shield segment hoisting device according to claim 2, characterized in that A slide rail is provided on the top of the low frame, and the bottom of the fifth hydraulic telescopic rod is slidably mounted on the slide rail. The position of the fifth hydraulic telescopic rod on the slide rail is adjusted to achieve a clamping connection with a suitable area on the bottom surface of the loading plate.

4. The large diameter shield segment hoisting device according to claim 2, characterized in that The top surface of the elevated body is flush with the top surface of the cargo loading plate of the transport vehicle.

5. The large diameter shield segment hoisting device according to claim 3 is characterized in that The lying state of the shield segment on the transport vehicle means that the outer curved surface of the shield segment faces the loading plate of the transport vehicle, two wooden sticks are arranged between the outer curved surface of the shield segment and the loading plate to support the shield segment, and the flip plate when the flip mechanism is in a horizontal posture extends into the space between the outer curved surface of the shield segment and the loading plate.

6. A large diameter shield segment hoisting device according to claim 5, 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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