An automatic lifting device for an arch frame of a cantilever type tunnel boring machine and a working method thereof

Abstract

The present invention discloses an automatic lifting device for an arch frame for a cantilever type tunnel boring machine, which comprises a frame, a lifting arm, an adjusting oil cylinder and a rotating platform. The frame is installed on the cutting arm of the cantilever tunnel boring machine, and a positioning shaft located above the frame is fixedly installed at one end of the top of the frame, and two sleeves are sleeved on the positioning shaft; the adjusting oil cylinder is fixedly installed at the center of the top of the frame, and the piston rod of the adjusting oil cylinder is hinged with the two sleeves; two lifting arms are respectively located on both sides of the adjusting oil cylinder, and one end is respectively fixedly sleeved on the corresponding two sleeves; the rotating platform is fixedly installed at the other end of the lifting arm, and a balancing rod is fixedly installed on the top of the rotating platform, and two telescopic oil cylinders are installed inside the balancing rod, and the piston rods of the two telescopic oil cylinders extend from the two ends of the balancing rod respectively, and the ends of the piston rods are both installed with positioning plates; the working method of the above-mentioned automatic lifting device for the arch frame is also disclosed. The present invention can improve the mechanization and automation degree of the arch frame installation, and provide conditions for the integrated construction of "digger, anchor and spray" of the cantilever type tunnel boring machine.

Description

Technical Field

[0001] The invention belongs to the technical field of tunnel excavation construction, relates to arch support construction equipment in a tunnel, and in particular to an arch automatic lifting device for a cantilever type tunnel boring machine and a working method thereof. Background Art

[0002] At present, in the construction of tunnels with weak surrounding rocks in China, it is necessary to install arch frames and cooperate with steel mesh sprayed concrete support to strengthen the structural strength of the tunnel surrounding rock. The lifting and installation of arch frames are divided into two methods: manual and mechanical: 1. The manual installation method is to lift the arch frame on the edge of the rock layer by manpower, fix it with anchor rods, and then connect it into a ring in sequence to form a supporting structure for the surrounding rock. The weight of a single arch frame is generally more than 100Kg, and it requires the cooperation of multiple people for installation. The labor intensity is extremely high, the alignment adjustment is labor-intensive, the labor time is long, and the safety is poor; 2. The mechanical installation method is that the robot grabs the required steel arch frame, lifts it to the installation position through the robot arm, and fixes it manually after automatic leveling. The entire lifting, leveling, and alignment are completed by machinery, which greatly reduces the labor intensity of people and ensures labor safety.

[0003] According to the construction plan and the needs of the construction site, there are equipment with various structures of mechanical lifting devices. There are special equipment designed specifically for lifting and installing arch frames, and there are also equipment that is modified from other machines and equipped with manipulator lifting devices. These equipment structures and functions have their own advantages. As for the arch frame installation of the cantilever tunnel boring machine construction method, the domestic installation is currently mainly assisted by manual or other special equipment. According to the tunnel construction process: tunneling-support-anchor spraying reinforcement-tunneling, the cantilever tunnel boring machine must withdraw from the working surface after each tunneling advance to make room for the next process (support and anchor spraying). The repeated entry and exit of this kind of machinery has invisibly increased the loss and energy consumption of the machinery, increased the maintenance cost of the machinery, and reduced the economic benefits of the construction; and with the continuous advancement of tunneling, the invalid working time of the machinery entering and exiting the site in each operation cycle has also been continuously lengthened, especially in the tunneling construction of super-long tunnels. This invalid working time of entering and exiting the site occupies most of the construction time, which has a huge impact on the construction speed of the tunnel boring machine. Summary of the invention

[0004] To solve the above problems, the purpose of the present invention is to provide an automatic arch lifting device for a cantilever tunnel boring machine, which has a simple structure, is lightweight and convenient, and has flexible positioning adjustment, and a working method thereof, which can improve the mechanization and automation level of arch installation, provide conditions for the integrated construction of "dig, anchor and spray" of the cantilever tunnel boring machine, reduce the frequency of the machine leaving and entering the site, and improve construction efficiency.

[0005] In order to achieve the above-mentioned invention object, the present invention adopts the following technical scheme:

[0006] The swivel platform is a kind of automatic lifting device for arch frame of cantilever type tunnel boring machine, and it comprises a frame, a lifting arm, an adjusting cylinder and a rotating platform, and the frame is installed on the cutting arm of cantilever tunnel boring machine, and a mounting plate located at the front and rear sides of the frame is installed at one end of the top of the frame, and a positioning shaft located above the frame is fixedly installed between the two mounting plates, and two shaft sleeves are sleeved on the positioning shaft; the adjusting cylinder is fixedly installed at the center of the top of the frame through a mounting seat, and the piston rod of the adjusting cylinder faces the two shaft sleeves, and the earrings provided at the tail of the piston rod are hinged with the ear seats provided on the two shaft sleeves; the lifting arms are two, which are respectively located on both sides of the adjusting cylinder and arranged in parallel, and one end of the two lifting arms is fixedly sleeved on the corresponding two shaft sleeves respectively; the rotating platform is fixedly installed on the other end of the lifting arm, and a balancing rod is fixedly installed on the top of the rotating platform, and the interior of the balancing rod is a hollow structure, and two telescopic cylinders are installed inside, and the piston rods of the two telescopic cylinders extend from the two ends of the balancing rod respectively, and the ends of the piston rods are both installed with positioning plates for clamping the arch frame.

[0007] Furthermore, there is a gap between the inner end surfaces of the two sleeves.

[0008] Furthermore, connecting seats are respectively provided at both ends of the bottom of the rotating platform, and the end of the lifting arm is connected to the connecting seat via a pin shaft.

[0009] A working method of an automatic lifting device for an arch frame of a cantilever type tunnel boring machine comprises the following steps:

[0010] Step 1: Install the arch frame automatic lifting device on the cutting arm of the cantilever tunneling machine through the frame. When installing the arch frame, the up and down and left and right movements of the arch frame are achieved by controlling the corresponding movements of the cutting arm;

[0011] Step 2. Use the power system of the cantilever tunnel boring machine to control the operation of the adjustment cylinder and the telescopic cylinder. When the adjustment cylinder is working, the piston rod extends out through the earring at the tail of the piston rod and is hinged with the ear seat set on the two shaft sleeves to rotate the ear seat and the shaft sleeve, thereby causing the two lifting arms to rotate in a circle with the connection between them and the two shaft sleeves as the center, driving the balance rod, the telescopic cylinder, the positioning plate and the arch frame clamped on the positioning plate to rotate accordingly. The arch frame can always remain vertically upward. When the telescopic cylinder is working, the horizontal distance between the two positioning plates can be adjusted by extending and retracting the piston rod to adapt to the steel arch beam support of different tunnel spans.

[0012] Due to the adoption of the above-mentioned technical solution, the present invention has the following advantages:

[0013] The automatic lifting device for the arch frame of the cantilever tunnel boring machine has a simple structure, is flexible and efficient, and can lift the supporting arch frame (steel beam) to the required supporting position. Cooperating with the telescopic oil cylinder, it can increase the applicable scope of the work, save a lot of manpower and material resources, greatly reduce the equipment cost, and improve the construction efficiency and safety. It has a self-adjusting function. During the lifting and lowering process of the steel beam lifted by the supporting claw, it can ensure that the supporting claw and the steel beam are always vertically upward, which is convenient for the operator to erect the top beam. It can meet the erection of various supporting arch frames in tunnels of different heights and widths, and the weight of the arch frame that can be lifted shall not exceed 600kg. It has good promotion and application value. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a front structural view of the automatic lifting device for the arch frame of the cantilever type tunnel boring machine of the present invention;

[0015] Figure 2 It is a side structural view of the automatic lifting device for the arch frame of the cantilever type tunnel boring machine of the present invention;

[0016] Figure 3 It is a top view of the structure of the automatic lifting device for the arch frame of the cantilever type tunnel boring machine of the present invention;

[0017] Figure 4 It is a three-dimensional structural diagram of the automatic lifting device of the arch frame for the cantilever type tunnel boring machine of the present invention;

[0018] Figure 5 yes Figure 4 A schematic diagram of the structure of the rotating platform in FIG.

[0019] Figure 6 It is a schematic diagram of the working state of the automatic lifting device of the arch frame for the cantilever type tunnel boring machine of the present invention;

[0020] In the figure: 1-frame; 2-mounting plate; 3-positioning shaft; 4-ear seat; 5-ear ring; 6-lifting arm; 7-adjusting cylinder; 8-rotating platform; 9-mounting seat; 10-balance rod; 11-sleeve; 12-positioning plate 13-telescopic cylinder; 14-connecting seat. DETAILED DESCRIPTION

[0021] The technical solution of the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0022] like Figures 1 to 6As shown, the automatic lifting device for the arch frame of the cantilever type tunnel boring machine comprises a frame 1, a lifting arm 6, an adjusting cylinder 7 and a rotating platform 8. The frame 1 is installed on the cutting arm of the cantilever tunnel boring machine, and a mounting plate 2 located at the front and rear sides of the frame is installed at one end of the top of the frame. A positioning shaft 3 located above the frame is fixedly installed between the two mounting plates, and two sleeves 11 are sleeved on the positioning shaft, and a gap is provided between the inner end surfaces of the two sleeves; the adjusting cylinder 7 is fixedly installed in the center of the top of the frame 1 through a mounting seat 9, and the piston rod of the adjusting cylinder faces the two sleeves, and the earring 5 provided at the tail of the piston rod is aligned with the two sleeves. The ear seat 4 is hinged; there are two lifting arms 6, which are respectively located on both sides of the adjusting cylinder 7 and arranged in parallel, and one end of the two lifting arms is fixedly sleeved on the corresponding two shaft sleeves 11; connecting seats 14 are respectively provided at both ends of the bottom of the rotating platform 8, and the other ends of the two lifting arms are respectively connected to the two connecting seats through pins, and a balancing rod 10 is fixedly installed on the top of the rotating platform 8. The interior of the balancing rod is a hollow structure, and two telescopic cylinders 13 are installed inside. The piston rods of the two telescopic cylinders extend from the two ends of the balancing rod respectively, and the ends of the piston rods are installed with positioning plates 12 for clamping the arch frame.

[0023] The automatic lifting device for an arch frame of a cantilever type tunnel boring machine of the present invention utilizes the power system of the cantilever tunnel boring machine to control the operation of an adjusting cylinder 7 and a telescopic cylinder 13; when the adjusting cylinder is working, a piston rod extends out through an earring 5 at the rear of the piston rod and is hinged with an ear seat 4 provided on two shaft sleeves 11, so that the ear seat and the shaft sleeve rotate, thereby causing the two lifting arms 6 to rotate in a circle with the connection portion between the two shaft sleeves as the center, thereby driving a balancing rod 10, a telescopic cylinder 13, a positioning plate 12 and an arch frame clamped on the positioning plate to rotate accordingly; the arch frame can always remain vertically upward; when the telescopic cylinder 13 is working, the horizontal distance between the two positioning plates 12 can be adjusted by telescoping the piston rod to adapt to the steel arch beam support of different tunnel spans.

[0024] The automatic lifting device of the arch frame of the present invention is installed on the cutting arm of the cantilever tunneling machine through a frame, relying on the power system of the cantilever tunneling machine; when the arch frame is installed, the up and down and left and right movements of the arch frame are achieved by controlling the corresponding movement of the cutting arm to drive the entire automatic lifting device, and the forward and backward movement and fine adjustment of the arch frame are achieved by controlling the adjustment cylinder and the telescopic cylinder.

[0025] The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention. Without departing from the spirit and scope of the present invention, all equivalent changes and modifications made within the scope of the patent application of the present invention shall fall within the scope of patent protection of the present invention.

Claims

1. An automatic lifting device for an arch frame of a cantilever type tunnel boring machine, characterized in that: It includes a frame, a lifting arm, an adjustment cylinder and a rotating platform. The frame is installed on the cutting arm of the cantilever tunneling machine. A mounting plate located at the front and rear sides of the frame is installed at one end of the top of the frame. A positioning shaft located above the frame is fixedly installed between the two mounting plates, and two sleeves are sleeved on the positioning shaft; the adjustment cylinder is fixedly installed at the center of the top of the frame through a mounting seat, the piston rod of the adjustment cylinder faces the two sleeves, and the earrings provided at the tail of the piston rod are hinged with the ear seats provided on the two sleeves; the lifting arms are two, which are respectively located on both sides of the adjustment cylinder and arranged in parallel, and one end of the two lifting arms is respectively fixedly sleeved on the corresponding two sleeves; the rotating platform is fixedly installed at the other end of the lifting arm, and a balance bar is fixedly installed on the top of the rotating platform. The balance bar is a hollow structure, and two telescopic cylinders are installed inside. The piston rods of the two telescopic cylinders extend from the two ends of the balance bar respectively, and the ends of the piston rods are both installed with positioning plates for clamping the arch frame; there is a gap between the inner end surfaces of the two sleeves; the two ends of the bottom of the rotating platform are respectively provided with connecting seats, and the ends of the lifting arms are connected to the connecting seats through pins.

2. A working method of the automatic lifting device for the arch frame of a cantilever type tunnel boring machine according to claim 1, characterized in that: It includes the following steps: Step 1: Install the arch frame automatic lifting device on the cutting arm of the cantilever tunneling machine through the frame. When installing the arch frame, the up and down and left and right movements of the arch frame are achieved by controlling the corresponding movements of the cutting arm; Step 2. Use the power system of the cantilever tunnel boring machine to control the operation of the adjustment cylinder and the telescopic cylinder. When the adjustment cylinder is working, the piston rod extends out through the earring at the tail of the piston rod and is hinged with the ear seat set on the two shaft sleeves to rotate the ear seat and the shaft sleeve, thereby causing the two lifting arms to rotate in a circle with the connection between them and the two shaft sleeves as the center, driving the balance rod, the telescopic cylinder, the positioning plate and the arch frame clamped on the positioning plate to rotate accordingly. The arch frame can always remain vertically upward. When the telescopic cylinder is working, the horizontal distance between the two positioning plates can be adjusted by extending and retracting the piston rod to adapt to the steel arch beam support of different tunnel spans.

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