Subway tunnel shield segment lifting device

Abstract

The subway tunnel shield segment hoisting device comprises a box body, two hoisting rings are symmetrically arranged at the top of the box body, the bottom of the box body is open, a disc-shaped gear is arranged in the box body, an annular lower cover plate is installed at the lower end of the box body, the gear is rotationally connected with the lower cover plate, and the box body is provided with a driving mechanism for driving the gear to rotate; two hinged supports are symmetrically arranged on the bottom face of the gear, the lower ends of the hinged supports penetrate through an inner hole of the lower cover plate, a first lifting bent arm and a second lifting bent arm are hinged to the two hinged supports respectively, and hook parts are arranged at the lower end of the first lifting bent arm and the lower end of the second lifting bent arm and arranged in the opposite directions. In the lifting process, the pipe piece can be automatically hooked without the help of a forklift or manual assistance, operation is easy and efficient, the lifting bent arm and other stress structures of the device all adopt rigid components, and compared with a flexible bandage, the device has better durability and safety.

Description

Technical Field

[0001] The invention relates to subway tunnel construction, in particular to a subway tunnel shield segment lifting device. Background Art

[0002] The shield machine is a special engineering machinery for subway tunnel excavation. The cross-sectional shape of the shield is the same as that of the tunnel, but slightly larger. It uses a rotary cutter to excavate, has a built-in earth-moving machine, and has its own protective shell. It is a machine used for dark tunnel excavation. The shield segment is the main assembly component of the shield construction and the outermost barrier of the tunnel. It is responsible for resisting soil pressure, groundwater pressure and some special loads. The shield segment is the permanent lining structure of the shield tunnel. The quality of the shield segment is directly related to the overall quality and safety of the tunnel, and affects the waterproof performance and durability of the tunnel.

[0003] During the construction of subway tunnels, shield segments on the ground need to be hoisted into underground tunnels for installation. The existing lifting method is to use an arc-shaped carrier plate, connect lifting straps (polyester webbing) at both ends of the carrier plate, stack the segments on the carrier plate, and then use a crane hook to hook the straps to lift the segments. This lifting method requires the use of a forklift to transfer the segments to the carrier plate, which is cumbersome to operate and has low efficiency. Summary of the invention

[0004] The present invention aims to solve the above technical problems, thereby providing a subway tunnel shield segment lifting device to improve the construction efficiency of the shield segment.

[0005] The present invention solves the technical problem and adopts the following technical solution: A subway tunnel shield segment lifting device comprises a box body, and two lifting rings are symmetrically arranged on the top of the box body. The bottom of the box is open, a disc-shaped gear is installed in the box, an annular lower cover is installed at the lower end of the box, the gear is rotatably connected to the lower cover, and the box is provided with a driving mechanism for driving the gear to rotate; Two hinge seats are symmetrically provided on the bottom surface of the gear, and the lower ends of the hinge seats pass through the inner hole of the lower cover plate. The first lifting arm and the second lifting arm are hinged to the two hinge seats respectively, and the lower ends of the first lifting arm and the second lifting arm are both provided with hook portions and are arranged in opposite directions.

[0006] Compared with the prior art, the present invention using the above technical solution has the following beneficial effects: 1) During the lifting process, the pipe segments can be automatically hooked without the help of a forklift or manual assistance. The operation is simple and efficient. The lifting arm and other force-bearing structures of the device are all rigid components, which are more durable and safer than flexible straps (flexible straps are flat and can be cut and damaged by the edge of the pipe segment or other sharp objects); 2) Before the lifting operation, the lifting arm spacing can be adjusted using the spacing adjustment mechanism according to the size of the segment, so that the lifting arm can obtain the best lifting force point on the segment.

[0007] Further, the optimization scheme of the present invention is: The first lifting arm includes a hook portion, a lower vertical portion, an inclined portion and an upper vertical portion.

[0008] The hook portion of the first lifting arm is C-shaped, and an anti-slip boss is provided at the outer end of the lower horizontal rod of the hook portion.

[0009] The inclined portions of the first lifting arm and the second lifting arm are in an eight-shaped shape.

[0010] A spacing adjustment mechanism is provided between the first lifting arm and the second lifting arm, and the spacing adjustment mechanism includes an ear seat, The screw rod and the internal thread sleeve, the two ear seats are respectively fixed to the inner side surfaces of the two lifting curved arms, the two screw rods are respectively hinged to the two ear seats, and the internal thread sleeve is respectively bolted to the two screw rods.

[0011] There are two driving mechanisms which are symmetrically arranged.

[0012] The driving mechanism comprises a reduction motor and a driving gear. The output of the reduction motor is placed in the box and the driving gear is installed. The driving gear is meshed with the gear.

[0013] A thrust bearing is arranged between the gear and the lower cover plate.

[0014] The gear is provided with a center hole, and the box body is provided with a positioning shaft, which is rotatably connected with the center hole of the gear through a bearing.

[0015] The two hanging rings and the two driving mechanisms are arranged in a cross shape. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a front view of an embodiment of the present invention; Figure 2 is a cross-sectional view of an embodiment of the present invention; Figure 3 A schematic diagram of a positioning shaft and a gear according to an embodiment of the present invention; Figure 4 Schematic diagram of a first lifting arm and a second lifting arm according to an embodiment of the present invention; Figure 5 It is a schematic diagram of hoisting a pipe segment by a first lifting arm and a second lifting arm according to an embodiment of the present invention; Figure 6 It is a schematic diagram of lifting and releasing pipe segments by the first lifting arm and the second lifting arm according to an embodiment of the present invention.

[0017] In the figure: box body 1; lifting ring 2; gear 3; bearing 4; lower cover plate 5; thrust bearing 6; positioning shaft 7; reduction motor 8; driving gear 9; hinge seat 10; first lifting arm 11; hook portion 1101; lower vertical portion 1102; inclined portion 1103; upper vertical portion 1104; anti-slip boss 1105; second lifting arm 12; ear seat 13; screw 14; internal threaded sleeve 15; positioning nut 16; pipe segment 17. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0019] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0020] See also Figure 1-Figure 4 The present embodiment provides a subway tunnel shield segment lifting device, which is mainly composed of a box body 1, a lifting ring 2, a gear 3, a lower cover plate 5, a first lifting arm 11 and a second lifting arm 12. The box body 1 is circular, and its lower end is an open structure. The outer circumferential surface of the lower end of the box body 1 is provided with a flange structure. Two lifting rings 2 are symmetrically installed on the top of the box body 1. The lifting rings 2 are used to connect the steel cables of the crane. Two parallel steel cables can be connected at the same time, thereby limiting the swing of the device during the lifting process.

[0021] A disc-shaped gear 3 is installed in the housing 1, and the axis of the gear 3 is arranged vertically. A lower cover plate 5 is installed at the lower port of the housing 1. The lower cover plate 5 is annular and connected to the flange structure of the housing 1 by bolts. The diameter of the inner hole of the lower cover plate 5 is smaller than the diameter of the gear 3. A thrust bearing 6 is installed between the bottom surface of the gear 3 and the top surface of the lower cover plate 5. The gear 3 is provided with a center hole, and a bearing 4 is installed in the center hole. The bearing 4 is a deep groove ball bearing. The positioning shaft 7 is vertically installed in the bearing 4, and the upper end of the positioning shaft 7 is fixedly connected to the bottom surface of the top plate of the housing 1. The positioning shaft 7 positions the gear 3 so that the axis of the gear 3 coincides with the axis of the housing 1.

[0022] Two driving mechanisms are symmetrically installed on the top plate of the box body 1. The driving mechanism adopts a reduction motor 8. The two lifting rings 2 and the two reduction motors 8 are arranged in a cross shape. The housing of the reduction motor 8 is connected to the top plate of the box body 1 by bolts. The output shaft of the reduction motor 8 is placed in the box body 1 and is installed with a driving gear 9. The driving gear 9 is meshed with the gear 3. The reduction motor 8 drives the gear 3 to rotate in the box body 1 through the driving gear 9. In this embodiment, two reduction motors 8 are arranged. On the one hand, the device is symmetrical and the center of gravity is centered, so that the device remains balanced. On the other hand, the two reduction motors 8 can be driven simultaneously through different control coordination methods. The advantage of simultaneous driving can reduce the load of the single-side transmission teeth. It can also work and drive in turns. The advantage of working in turns is to avoid a single reduction motor 8 from working continuously for a long time and heating up to affect the working condition, or one reduction motor 8 is used as a spare. When another fails, the spare reduction motor 8 can be temporarily activated.

[0023] Two hinge seats 10 are symmetrically installed on the bottom surface of the gear 3. The lower ends of the two hinge seats 10 penetrate the inner hole of the lower cover plate 5. The first lifting arm 11 and the second lifting arm 12 are hinged to the two hinge seats 10 respectively. The first lifting arm 11 and the second lifting arm 12 have the same structure. The first lifting arm 11 is composed of a hook portion 1101, a lower vertical portion 1102, an inclined portion 1103 and an upper vertical portion 1104 from bottom to top. The hook portion 1101 is C-shaped. The hook portions 1101 of the first lifting arm 11 and the second lifting arm 12 are arranged in reverse. The inclined portions 1103 of the first lifting arm 11 and the second lifting arm 12 are in an eight-shaped shape. The inclined portion 1103 is used to increase the distance between the two hook portions 1101. The projection of the inclined portion 1103 on the horizontal plane is perpendicular to the lower horizontal rod of the hook portion 1101. An anti-slip boss 1105 is provided on the upper part of the outer end of the lower horizontal rod of the hook portion 1101, which prevents the pipe segment 17 from sliding laterally on the hook portion 1101 after being lifted, thereby improving safety. The upper end of the upper vertical portion 1104 is hinged to the hinge seat 10 through a pin shaft.

[0024] A spacing adjustment mechanism is provided between the inclined portions 1103 of the first lifting arm 11 and the second lifting arm 12, and the spacing adjustment mechanism is mainly composed of an ear seat 13, a screw rod 14, an internal threaded sleeve 15 and a positioning nut 16. The two ear seats 13 are symmetrically welded to the inner side surfaces of the two inclined portions 1103, the two screw rods 14 are respectively hingedly connected to the two ear seats 13, the two screw rods 14 are rotated in opposite directions, the internal threaded sleeve 15 is respectively threadedly connected to the two screw rods 14, and the screw rods 14 are screwed with positioning nuts 16. The spacing between the first lifting arm 11 and the second lifting arm 12 can be adjusted by the spacing adjustment mechanism, so that the lifting arm can obtain the best lifting force point on the pipe segment 17.

[0025] The working process of this embodiment is ( Figure 5 , Figure 6As shown in the figure): First prepare a crane. The crane needs to be a double-cable type. The two lifting cables of the crane are connected to the two lifting rings 2 respectively. The two ends of the pipe segment 17 to be lifted are placed on the flat ground with their ends facing upwards. The crane drives the device to move above the pipe segment 17. When the device is slowly lowered close to the pipe segment 17, the gear 3 is driven to rotate by controlling the reduction motor 8, and then the first lifting arm 11 and the second lifting arm 12 are driven to rotate. After the first lifting arm 11 and the second lifting arm 12 are rotated to stagger with the pipe segment 17, the device is continued to be lowered. , so that the bottom of the hook part 1101 of the first lifting arm 11 and the second lifting arm 12 is close to the ground. At this time, the first lifting arm 11 and the second lifting arm 12 are driven to rotate again by the reduction motor 8, so that the hook part 1101 of the first lifting arm 11 and the second lifting arm 12 is extended to the bottom of the pipe segment 17. Finally, the pipe segment 17 can be lifted by the crane. After the pipe segment 17 is transferred to the destination, the pipe segment 17 is lowered, and the first lifting arm 11 and the second lifting arm 12 are withdrawn to separate from the pipe segment 17. During the lifting process, the pipe segment 17 can be automatically hooked without the help of a forklift or manual assistance, and the operation is simple and efficient. Before the lifting operation, the distance between the first lifting arm 11 and the second lifting arm 12 can be adjusted by the distance adjustment mechanism according to the size of the pipe segment 17, so that the first lifting arm 11 and the second lifting arm 12 can obtain the best lifting force point on the pipe segment 17.

[0026] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements all fall within the scope of the present invention to be protected.

Claims

1. A subway tunnel shield segment lifting device, comprising a box body, with two lifting rings symmetrically arranged on the top of the box body, characterized in that: The bottom of the box is open, a disc-shaped gear is installed in the box, an annular lower cover is installed at the lower end of the box, the gear is rotatably connected to the lower cover, and the box is provided with a driving mechanism for driving the gear to rotate; Two hinge seats are symmetrically provided on the bottom surface of the gear, and the lower ends of the hinge seats pass through the inner hole of the lower cover plate. The first lifting arm and the second lifting arm are hinged to the two hinge seats respectively, and the lower ends of the first lifting arm and the second lifting arm are both provided with hook portions and are arranged in opposite directions.

2. The subway tunnel shield segment lifting device according to claim 1 is characterized in that: The first lifting arm includes a hook portion, a lower vertical portion, an inclined portion and an upper vertical portion.

3. The subway tunnel shield segment lifting device according to claim 1 is characterized in that: The hook portion of the first lifting arm is C-shaped, and an anti-slip boss is provided at the outer end of the lower horizontal rod of the hook portion.

4. The subway tunnel shield segment lifting device according to claim 1 is characterized in that: The inclined portions of the first lifting arm and the second lifting arm are in an eight-shaped shape.

5. The subway tunnel shield segment lifting device according to claim 1 is characterized in that: The first lifting bend A spacing adjustment mechanism is provided between the arm and the second lifting bent arm, and the spacing adjustment mechanism includes an ear seat, a screw rod and an internal threaded sleeve. The two ear seats are respectively fixed to the inner sides of the two lifting bent arms, the two screw rods are respectively hinged to the two ear seats, and the internal threaded sleeves are respectively bolted to the two screw rods.

6. The subway tunnel shield segment lifting device according to claim 1 is characterized by: There are two driving mechanisms which are symmetrically arranged.

7. The subway tunnel shield segment lifting device according to claim 1 is characterized in that: The driving mechanism comprises a reduction motor and a driving gear. The output of the reduction motor is placed in the box and the driving gear is installed. The driving gear is meshed with the gear.

8. The subway tunnel shield segment lifting device according to claim 1 is characterized by: The gear and the lower cover Thrust bearings are installed between the plates.

9. The subway tunnel shield segment lifting device according to claim 1, characterized in that: The gear is provided with a center hole, and the box body is provided with a positioning shaft, which is rotatably connected with the center hole of the gear through a bearing.

10. The subway tunnel shield segment lifting device according to claim 1, characterized in that: The two hanging rings and the two driving mechanisms are arranged in a cross shape.

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