A device and a hoisting method for automatically hoisting shield segments during shield construction

Abstract

The present invention discloses a device and a hoisting method for automatically hoisting shield segments during shield construction, including a shield segment assembling head and a rotating hoisting assembly; the shield segment assembling head can be clamped into the rotating hoisting assembly and rotate or move together with the rotating hoisting assembly. The rotating hoisting assembly drives the shield segment assembling head to rotate into the shield segment, and then they are hoisted together to the required working station. For the first time, the traditional circular hoisting head at the top of the assembling head is processed into a square shape in this device, which increases the friction between the motor rotating device and the assembling head, facilitates torque transmission, and the square head is conducive to being clamped into the connecting device. Cooperating with the rotating hoisting assembly, it can realize the automatic operation of the assembling head rotating into the shield segment and hoisting.

Description

Technical Field

[0001] The invention belongs to the technical field of tunnel engineering, and particularly relates to a device and a hoisting method for automatically hoisting shield segments during shield construction. Background Art

[0002] During the process of tunneling soil by a shield machine underground, the shield machine face needs shield segments to resist soil pressure, groundwater pressure and some special loads. The shield segments are transported to the position of the shield machine face by a small crane built in the shield machine, and then the installation work is completed.

[0003] Currently, the main method for hoisting shield segments is to first let workers use wrenches to screw the shield segment splicing heads into the shield segments, and then control the shield crane to grab the splicing heads with the crane's buckles and transport them to the tunneling face for support.

[0004] The above method has the following problems:

[0005] (1) In actual assembly operations, it mainly relies on manual labor to connect the splicing head and the segment together with a wrench. The resistance is relatively large during the process of screwing the splicing head into the segment, especially when assembling the negative ring segments (mostly using old segments), the resistance is more obvious. Workers often can only use the traditional method of adding a force-increasing pipe to extend the force arm to increase the torque. Coupled with the relatively narrow space for assembly operations and the limited operating space of the workers themselves, there is often only enough space for one or two workers to perform the assembly operation. This method can only improve the segment assembly efficiency by rotating workers, which is time-consuming and laborious.

[0006] (2) During traditional hoisting construction, after the splicing head is clamped into the hoisting fixture, there is no restraint to limit the movement of the splicing head. During the hoisting process, due to the vibration of the machinery, the splicing head is very likely to fall off. Summary of the Invention

[0007] Object of the Invention: The technical problem to be solved by the present invention is to provide a device for automatically hoisting shield segments during shield construction in view of the deficiencies of the prior art, which can effectively improve the hoisting efficiency of shield segments and greatly improve the operation safety during hoisting.

[0008] In order to achieve the above object, the technical solution adopted by the present invention is as follows:

[0009] A device for automatically hoisting shield segments during shield construction includes a shield segment splicing head and a rotary hoisting assembly; the shield segment splicing head can be clamped into the rotary hoisting assembly and rotate or move together with the rotary hoisting assembly.

[0010] Specifically, the shield segment assembling head includes a screw head, a threaded rod, a lifting head and a lifting neck; the threaded rod is fixedly connected below the screw head, and the threaded rod is used to screw into the lifting hole on the shield segment; the top of the screw head is connected with a lifting head, and the lifting head is clamped into the rotary lifting assembly and rotates together with the rotary lifting assembly, so as to realize screwing the threaded rod into the shield segment; the screw head and the lifting head are connected through a lifting neck.

[0011] Further, the lifting head is a polygonal block, such as a quadrilateral or a hexagon, which is convenient for torque transmission.

[0012] Specifically, the shield segment assembling head is clamped into the rotary lifting assembly through the lifting neck and is moved to the required position through the rotary lifting assembly.

[0013] Specifically, the rotary lifting assembly includes a lifting clamp, a metal sleeve and a sleeve driving assembly; the lifting clamp has a lateral opening, and a clamping groove matching with the lifting neck is arranged at the bottom, and the lifting neck is clamped into the lifting clamp through the clamping groove; the metal sleeve realizes vertical lifting and horizontal rotation in the lifting clamp through the sleeve driving assembly, and the lifting head is clamped into the metal sleeve and rotates together with the metal sleeve.

[0014] Specifically, the sleeve driving assembly includes a push-pull electromagnet and a push-pull rod; one end of the push-pull rod is fixed to the metal sleeve, and the other end is connected to the push-pull electromagnet; a spring is sleeved on the push-pull rod. When the push-pull electromagnet is powered on, the push-pull rod is pulled up by the electromagnetic force, so as to drive the metal sleeve to move. At this time, the lifting neck is clamped into the clamping groove of the lifting clamp, and at the same time, the lifting head is located at the bottom of the metal sleeve; when the push-pull electromagnet is powered off at this time, the metal sleeve moves downward under the action of the spring and sleeves the lifting head.

[0015] Specifically, the sleeve driving assembly further includes a driven gear, a driving gear and a motor; the driven gear is installed on the top of the lifting clamp, and a polygonal through hole for the vertical sliding of the metal sleeve is arranged at the center of the driven gear. The metal sleeve is arranged through the polygonal through hole and can rotate horizontally synchronously with the driven gear; the driving gear is installed on the top of the lifting clamp and meshes with the driven gear; the motor is connected to the driving gear, and the driving gear and the driven gear are driven to rotate through the motor, so as to drive the metal sleeve to rotate and further drive the shield segment assembling head to rotate.

[0016] Further, a polygonal clamping groove matching with the lifting head is arranged at the bottom of the metal sleeve.

[0017] Furthermore, the present invention also claims to protect a method for automatically hoisting shield segments by using the above device, which specifically includes the following steps:

[0018] (1)Insert the segment assembling head of the shield into the rotating hoisting assembly, and hoist the rotating hoisting assembly and the segment assembling head of the shield above the shield segment together by a crane.

[0019] (2)Adjust the segment assembling head of the shield by the crane to align it with the hoisting hole on the shield segment, and then rotate the segment assembling head of the shield into the hoisting hole of the shield segment through the rotating hoisting assembly for fixation.

[0020] (3)Move the rotating hoisting assembly and the shield segment fixed at the bottom of the segment assembling head of the shield to the segment splicing station by the crane for splicing construction. After splicing is completed, screw out the segment assembling head of the shield from the shield segment, and then carry out the hoisting work for the next shield segment.

[0021] Furthermore, the rotating hoisting assembly is fixedly installed on the crane and moves synchronously with the crane; the segment assembling head of the shield is movably connected to the rotating hoisting assembly. Multiple segment assembling heads of the shield can be provided, and each shield segment corresponds to one segment assembling head of the shield. Workers can preliminarily screw the segment assembling head of the shield into the shield segment in advance and wait for the hoisting work, which saves the operation steps of aligning the same segment assembling head of the shield with each shield segment and further improves the hoisting work efficiency. Beneficial effects

[0022] (1)For the first time, the circular hoisting head at the top of the traditional assembling head of the present device is processed into a square shape, which increases the friction between the motor rotating device and the assembling head, facilitates torque transmission, and the square head is conducive to being clamped into the connecting device. Cooperating with the rotating hoisting assembly, it can realize the automatic operation of screwing the assembling head into the shield segment and hoisting.

[0023] (2)The present device can effectively improve the hoisting of shield segments, and can be applicable to segment assembling heads of various sizes, greatly improving the work efficiency and saving manpower.

[0024] (3)Under the background of the country's advocacy of civilized construction, the present invention can greatly liberate the hands of workers and improve the construction environment. Description of the drawings

[0025] The following further specifically describes the present invention in conjunction with the drawings and specific embodiments, and the above and / or other advantages of the present invention will become clearer.

[0026] Figure 1 is the overall structural schematic diagram of the present device.

[0027] Figure 2 is the structural schematic diagram of the improved segment assembling head of the shield.

[0028] Figure 3It is a structural schematic diagram of a rotary hoisting assembly.

[0029] Figure 4 It is a process diagram of hoisting using this device.

[0030] Figure 5 It is an overall view during the hoisting process.

[0031] Among them, each reference numeral represents respectively:

[0032] 1 - Push - pull electromagnet; 2 - Driven gear; 21 - Polygonal through - hole; 3 - Driving gear; 4 - Metal sleeve; 5 - Electric motor; 6 - Hoisting fixture; 7 - Shield segment assembling head; 71 - Screw head; 72 - Screw rod; 73 - Hoisting head; 74 - Hoisting neck; 8 - Push - pull rod. Specific embodiments

[0033] According to the following embodiments, the present invention can be better understood.

[0034] The structures, ratios, sizes, etc. shown in the drawings of the specification are only used to cooperate with the content disclosed in the specification for those skilled in this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention. Therefore, they do not have technical essential significance. Any modification of the structure, change of the proportional relationship, or adjustment of the size, without affecting the effects that the present invention can produce and the purposes that can be achieved, should still fall within the scope covered by the technical content disclosed in the present invention. At the same time, the terms such as "upper", "lower", "front", "rear", "middle", etc. cited in this specification are only for the convenience of clear narration and are not used to limit the scope for the implementation of the present invention. The change or adjustment of their relative relationships, without substantial change in the technical content, should also be regarded as the scope for the implementation of the present invention.

[0035] As Figure 1 shown, the device for automatically hoisting shield segments in shield construction includes a shield segment assembling head 7 and a rotary hoisting assembly; the shield segment assembling head 7 can be clamped into the rotary hoisting assembly and rotate or move together with the rotary hoisting assembly. The shield segment assembling head 7 is driven by the rotation of the rotary hoisting assembly to screw into the shield segment, and then they are hoisted together to the required working position.

[0036] As Figure 2 shown, the shield segment assembling head 7 includes a screw head 71, a screw rod 72, a hoisting head 73, and a hoisting neck 74. Different from traditional assembling heads, the head of traditional assembling heads is circular, which is not conducive to the transmission of the torque of the electric mechanism. In this device, the hoisting head 73 is processed into a square shape, which increases the friction between the motor rotating device and the assembling head, facilitating torque transmission, and the square head is conducive to being clamped into the connecting device.

[0037] The threaded rod 72 is fixedly connected below the screw head 71. The threaded rod 72 is used to be screwed into the lifting hole on the shield segment. A lifting head 73 is connected to the top of the screw head 71. The lifting head 73 is snapped into the rotary lifting assembly and rotates together with the rotary lifting assembly, so as to screw the threaded rod 72 into the shield segment. The screw head 71 and the lifting head 73 are connected by a lifting neck 74.

[0038] The lifting head 73 is a polygonal block. In this embodiment, a quadrilateral is adopted, which is convenient for torque transmission and snapping in.

[0039] The shield segment assembling head 7 is snapped into the rotary lifting assembly through the lifting neck 74 and is moved to the required position through the rotary lifting assembly.

[0040] Combined Figure 1 with Figure 3 , the rotary lifting assembly includes a lifting clamp 6, a metal sleeve 4 and a sleeve driving assembly. The lifting clamp 6 has a lateral opening and a clamping groove matching with the lifting neck 74 at the bottom. The lifting neck 74 is snapped into the lifting clamp 6 through this clamping groove. The metal sleeve 4 realizes vertical lifting and horizontal rotation in the lifting clamp 6 through the sleeve driving assembly. The lifting head 73 is snapped into the metal sleeve 4 and rotates together with the metal sleeve 4. When starting the lifting, the lifting clamp 6 is snapped at the lifting neck 74, so that the nested structure formed by the metal sleeve 4 and the lifting head 73 restricts the movement of the lifting head 73, thus ensuring that the lifting head 73 will not fall off from the lifting clamp 6 due to the shaking of the shield segment during the lifting process, causing a safety accident.

[0041] The sleeve driving assembly includes a push-pull electromagnet 1 and a push-pull rod 8. One end of the push-pull rod 8 is fixed to the metal sleeve 4, and the other end is connected to the push-pull electromagnet 1. A spring is sleeved on the push-pull rod 8. When the push-pull electromagnet 1 is powered on, the push-pull rod 8 is pulled up by the electromagnetic force, so as to drive the metal sleeve 4 to move. At this time, the lifting neck 74 is snapped into the clamping groove of the lifting clamp 6, and at the same time, the lifting head 73 is located at the bottom of the metal sleeve 4. At this time, when the push-pull electromagnet 1 is powered off, the metal sleeve 4 is moved downward by the spring and covers the lifting head 73. The bottom of the metal sleeve 4 is provided with a quadrilateral clamping groove matching with the lifting head 73. When the metal sleeve 4 drops, it will cover the lifting head 73 to form a closed structure.

[0042] The sleeve drive assembly also includes a driven gear 2, a driving gear 3 and a motor 5; the driven gear 2 is installed on the top of the lifting fixture 6, and a polygonal through hole 21 is provided in the center of the driven gear 2 for the metal sleeve 4 to slide up and down. The metal sleeve 4 is penetrated in the polygonal through hole 21 and can rotate synchronously with the driven gear 2 horizontally; the driving gear 3 is installed on the top of the lifting fixture 6 and meshes with the driven gear 2; the motor 5 is connected to the driving gear 3, and the driving gear 3 and the driven gear 2 are driven to rotate by the motor 5, thereby driving the metal sleeve 4 to rotate, and further driving the shield segment assembly head 7 to rotate.

[0043] In this embodiment, the driven gear 2 has 50 teeth, the driving gear 3 has 10 teeth, and the transmission ratio is 5:1, thereby achieving the transmission and amplification of the motor torque. The push-pull electromagnet 1 has a stroke of 60mm, a voltage of AC220V, a current of 8A, and a pulling force of 150N.

[0044] Combination Figure 4 and Figure 5 The process of shield segment hoisting using this device is as follows:

[0045] (1) Before lifting, the push-pull electromagnet 1 needs to be energized. The electromagnetic force will lift the push-pull rod 8, thereby driving the metal sleeve 4 to move upward, leaving space for the lifting head 73 to be inserted into the lifting fixture 6. Then, insert the lifting neck 74 into the bottom slot of the lifting fixture 6, and adjust the lifting head 73 so that the lifting head 73 is aligned with the square groove at the bottom of the metal sleeve 4. After the metal sleeve 4 falls, it can just cover the lifting head 73 to form a seal. Disconnect the power supply of the push-pull electromagnet 1 to eliminate its internal magnetic force. Under the action of its internal spring, the push-pull rod 8 drives the metal sleeve 4 to fall, and the lifting head 73 is embedded in the internal square groove of the metal sleeve 4, forming a nested connection between the two.

[0046] (2) Align the lower part of the threaded rod 72 with the interface reserved for the shield segment to prepare for the splicing and hoisting of the shield segment. Power on the motor 5 to start working, driving the drive gear 3 connected to it to rotate, and further driving the driven gear 2 to rotate. The driven gear 2 transmits the torque to the metal sleeve 4, so that the shield segment assembly head 7 is screwed into the segment interface. After the screwing is completed, the power supply of the motor 5 is disconnected, and the electric rotation device stops working. Start the transportation device of the shield machine to hoist the entire device and the shield segment to the target location.

[0047] (3) After the segment is hoisted to the target location, the motor 5 is started again to unscrew the shield segment assembly head 7 from the shield segment, thus completing the hoisting process of the segment.

[0048] When hoisting the next shield segment, the shield segment assembly head 7 removed previously can be used for hoisting. However, it is difficult as the crane operator needs to accurately align the shield segment assembly head 7 with the shield segment hoisting hole. Therefore, each shield segment corresponds to a shield segment assembly head, and workers can preliminarily screw the shield segment assembly head into the shield segment in advance and wait for the hoisting work. This saves the operation steps of aligning the same shield segment assembly head with each shield segment and further improves the hoisting work efficiency.

[0049] The present invention provides an idea and method for a device and hoisting method for automatically hoisting shield segments in shield construction. There are many ways to specifically implement this technical solution. The above is only the preferred embodiment of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention. Each component not clearly defined in this embodiment can be implemented by existing technologies.

Claims

1. A device for automatically hoisting and installing shield segments during shield construction, characterized in that, it includes a shield segment assembling head (7) and a rotating hoisting assembly; the shield segment assembling head (7) can be inserted into the rotating hoisting assembly and rotate or move together with the rotating hoisting assembly; the shield segment assembling head (7) includes a screw head (71), a threaded rod (72), a hoisting head (73) and a hoisting neck (74); the threaded rod (72) is fixedly connected below the screw head (71), and the threaded rod (72) is used to screw into the hoisting hole on the shield segment; the top of the screw head (71) is connected with the hoisting head (73), the hoisting head (73) is inserted into the rotating hoisting assembly and rotates together with the rotating hoisting assembly, so as to realize screwing the threaded rod (72) into the shield segment; the screw head (71) and the hoisting head (73) are connected through the hoisting neck (74); the rotating hoisting assembly includes a hoisting clamp (6), a metal sleeve (4) and a sleeve driving assembly; the hoisting clamp (6) has a lateral opening and a clamping groove at the bottom for cooperating with the hoisting neck (74), and the hoisting neck (74) is inserted into the hoisting clamp (6) through this clamping groove; the metal sleeve (4) realizes vertical lifting and horizontal rotation in the hoisting clamp (6) through the sleeve driving assembly, and the hoisting head (73) is inserted into the metal sleeve (4) and rotates together with the metal sleeve (4).

2. The device for automatically hoisting and installing shield segments during shield construction according to claim 1, characterized in that, the hoisting head (73) is a polygonal block.

3. The device for automatically hoisting and installing shield segments during shield construction according to claim 1, characterized in that, the shield segment assembling head (7) is inserted into the rotating hoisting assembly through the hoisting neck (74) and is moved to the required position through the rotating hoisting assembly.

4. The device for automatically hoisting and installing shield segments during shield construction according to claim 1, characterized in that, the sleeve driving assembly includes a push-pull electromagnet (1) and a push-pull rod (8); one end of the push-pull rod (8) is fixed to the metal sleeve (4), and the other end is connected to the push-pull electromagnet (1); a spring is sleeved on the push-pull rod (8). When the push-pull electromagnet (1) is energized, the push-pull rod (8) is pulled up by electromagnetic force, thereby driving the metal sleeve (4) to move. At this time, the hoisting neck (74) is inserted into the clamping groove of the hoisting clamp (6), and at the same time, the hoisting head (73) is located at the bottom of the metal sleeve (4). At this time, when the push-pull electromagnet (1) is powered off, the metal sleeve (4) moves downward under the action of the spring and sleeves the hoisting head (73).

5. The device for automatically hoisting and installing shield segments during shield construction according to claim 1, characterized in that, The sleeve driving assembly further includes a driven gear (2), a driving gear (3) and a motor (5); the driven gear (2) is installed on the top of the hoisting fixture (6), and a polygonal through hole (21) for the up and down sliding of the metal sleeve (4) is provided at the center of the driven gear (2). The metal sleeve (4) is disposed through the polygonal through hole (21) and can rotate horizontally synchronously with the driven gear (2); the driving gear (3) is installed on the top of the hoisting fixture (6) and meshes with the driven gear (2); the motor (5) is connected to the driving gear (3), and the driving gear (3) and the driven gear (2) are driven to rotate by the motor (5), so as to drive the metal sleeve (4) to rotate, and further drive the shield segment assembling head (7) to rotate.

6. The device for automatically hoisting shield segments for shield construction according to claim 1, wherein, a polygonal clamping groove matching with the hoisting head (73) is provided at the bottom of the metal sleeve (4).

7. A method for automatically hoisting shield segments by using the device according to claim 1, wherein, it includes the following steps: (1) Clamp the shield segment assembling head into the rotary hoisting assembly, and hoist the rotary hoisting assembly and the shield segment assembling head together above the shield segment by a hoist; (2) Adjust the shield segment assembling head by the hoist to align it with the hoisting hole on the shield segment, and then make the shield segment assembling head screw into the hoisting hole of the shield segment and be fixed through the rotary hoisting assembly; (3) Move the rotary hoisting assembly and the shield segment fixed at the bottom of the shield segment assembling head to the segment splicing station by a hoist for splicing construction. After the splicing is completed, screw the shield segment assembling head out of the shield segment, and then carry out the hoisting work of the next shield segment.

8. According to the method of claim 7, wherein, the rotary hoisting assembly is fixedly installed on the hoist; the shield segment assembling head is movably connected with the rotary hoisting assembly.

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