Reinforcing structure of shield machine cutter drum

Abstract

The present application relates to a kind of shield machine cutter barrel reinforcing structure, including bolt reinforcing assembly for reinforcing cutter barrel flange bolt, and support assembly for detachably fixed to the rear of the cutter barrel, the bolt reinforcing assembly includes the lock washer that is correspondingly sleeved on the bolt, the support assembly includes support rod connected between the back of the cutter barrel and the inner wall of shield shell and maintained against the cutter barrel.The first end of the support rod extends along the axial direction and is fixed with a top support member that provides the force for maintaining against the cutter barrel.The present application solves the technical problem that the cutter barrel flange bolt of shield machine is prone to looseness when the shield machine is used to construct tunnels in areas with high hardness in the prior art.The present application reduces the probability of cutter barrel loosening and breaking, and improves the service life of cutter barrel bolt.The present application also reduces the time consumed by the shield machine due to the replacement of bolts to stop advancing, prolongs the service life of the cutter, and reduces the probability of cutter barrel bolt loosening and breaking.Reduce maintenance time, improve work efficiency.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of tunnel construction, in particular to a reinforcing structure for a cutter head of a shield tunneling machine. BACKGROUND

[0002] During tunnel construction involving a large amount of granite, the high hardness of granite causes high thrust and large vibration of the cutter head during tunnel construction using the shield method, which results in frequent loosening of the flange bolts of the cutter head. To solve the problem of bolt loosening, the bolt grade of the cutter head is upgraded from 8.8 to 10.9, and the friction torque is increased by increasing the air gun torque, which improves the bolt wire breakage phenomenon, but the bolts are still loose, and the loosening of the bolts leads to bolt fracture. Meanwhile, the cutter head with loose bolts also causes the fracture of the cutter gate bolts (bolt grade 8.8), and the bolt fracture positions are mainly concentrated in the middle part of the bolt arrangement, as shown in FIG. 1. The main reason for bolt loosening is the effect of continuous alternating load, and the transverse load is more likely to cause bolt loosening than the axial load. The above scheme does not solve the problem of insufficient stiffness of the rear part of the cutter head, so that the pre-tightening force decreases or disappears after the bolts are loose, and the bolts cannot play a connecting role. Under the action of vibration, the bolts collide with the hole wall, resulting in bolt fracture. Figure 1 SUMMARY

[0003] In view of the above-mentioned deficiencies in the prior art, the present application provides a reinforcing structure for a cutter head of a shield tunneling machine, which solves the technical problem of easy loosening of the flange bolts of the cutter head of the shield tunneling machine during tunnel construction in a region with high hardness using the shield tunneling machine.

[0004] The present application discloses a reinforcing structure for a cutter head of a shield tunneling machine, which comprises a bolt reinforcing assembly for reinforcing the flange bolts of the cutter head and a support assembly for detachable fixing to the rear part of the cutter head. The bolt reinforcing assembly comprises an anti-loosening washer corresponding to the bolts. The support assembly comprises a support rod connected between the back of the cutter head and the inner wall of the shield shell and maintaining the cutter head.

[0005] The reinforcing structure for the cutter head of the shield tunneling machine is further improved in that the first end of the support rod extends axially and is fixed with a jacking piece providing the force for maintaining the cutter head.

[0006] The reinforcing structure for the cutter head of the shield tunneling machine is further improved in that the jacking piece is a hydraulic jack.

[0007] The reinforcing structure for the cutter head of the shield tunneling machine is further improved in that the axis of the support rod coincides with the axis of the cutter head.

[0008] The reinforcing structure for the cutter head of the shield tunneling machine is further improved in that the inner wall of the shield shell is fixed with a fixed block for the first end of the support rod to be hinged, and the jacking piece is fixed to the second end of the support rod.​

[0009] The shield machine cutter barrel reinforcing structure further improves that the support rod is formed by two sections in abutment, and the two sections of the support rod are fixed in abutment through flanges.

[0010] The shield machine cutter barrel reinforcing structure further improves that the reinforcing assembly further comprises a double gasket sleeved on the two adjacent bolts and fixed on the two corresponding lock washers.

[0011] Compared with the prior art, the effect of the present application is positive and obvious. The present application reduces the loosening of the bolts through the reinforcing assembly, and solves the problem of insufficient rigidity of the rear part of the cutter barrel through the support assembly, thereby solving the technical problem that the flange bolts of the cutter barrel of the shield machine are prone to loosening when the shield machine is used to construct a tunnel in a region with large hardness. The present application reduces the probability of loosening and breaking of the cutter barrel, and prolongs the service life of the cutter barrel bolts. The present application also reduces the time consumed by the shield machine for stopping advancing due to replacement of the bolts, shortens the construction period, and reduces the construction cost. The service life of the cutter is prolonged, the probability of loosening and breaking of the cutter barrel bolts is reduced, the maintenance time is reduced, and the work efficiency is improved. BRIEF DESCRIPTION OF DRAWINGS

[0012] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the following embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0013] Figure 1 FIG. 1 is a schematic view of the cutter barrel structure of the shield machine cutter barrel reinforcing structure of the present application.

[0014] Figure 2 FIG. 2 is a side sectional view of the shield machine cutter barrel reinforcing structure of the present application.

[0015] Figure 3 FIG. 3 is a longitudinal sectional view of the bolt of the shield machine cutter barrel reinforcing structure of the present application. DETAILED DESCRIPTION

[0016] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings of the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0017] As Figures 1-3As shown, the present application provides a shield machine cutter drum 1 reinforcing structure, which comprises a bolt 2 reinforcing assembly for reinforcing the flange bolt 2 of the cutter drum 1, and a support assembly for detachably fixing to the rear of the cutter drum 1, the bolt 2 reinforcing assembly comprises a lock washer 8 which is sleeved on the bolt 2 one by one, and the support assembly comprises a support rod 5 which is connected between the back of the cutter drum 1 and the inner wall of the shield shell 3 and maintains the cutter drum 1. The structure of the present application increases the rigidity of the rear of the cutter drum 1, so that the natural frequency of each stage of the cutter drum 1 is far away from the vibration frequency of the cutter head, thereby effectively protecting the flange and the gate bolt 2, and the bolt 2 is not easy to loosen. The installation and operation are simple, the support rod 5 is welded by steel pipe, and the cost is lower. The overall weight is lighter, and the weight of the support rod 5 under the action of 80t support force is about 90kg.

[0018] Further, the first end of the support rod 5 is fixed with a jacking piece 7 which provides the force for maintaining the cutter drum. Preferably, the jacking piece 7 is preferably adapted to always apply a jacking force to the cutter drum 1, so that the axial force applied to the cutter drum 1 can be greatly offset.

[0019] Preferably, the jacking piece 7 is a hydraulic jack. The jacking force of the hydraulic jack is large, and the use is convenient, which can offset part of the axial force applied to the cutter drum 1 during construction, so that the flange bolt 2 of the cutter drum 1 is not loosened or broken due to excessive force.

[0020] Preferably, as shown, Figure 2 The axis of the support rod 5 coincides with the axis of the cutter drum 1. Since the cutter drum 1 is axially stressed during construction, and the bolt 2 of the cutter drum 1 also fixes the flange of the cutter drum 1 along the axial direction of the cutter drum 1, the axial stress of the bolt 2 is large during construction. The present application adopts the mode of arranging the support rod 5 at the rear of the cutter drum 1 to share the stress of the bolt 2, thereby reducing the stress of the bolt 2 itself, and further preventing the bolt 2 from loosening or breaking due to excessive stress.

[0021] Preferably, the inner wall of the shield shell 3 is fixed with a fixed block 4 for hinging the first end of the support rod 5, and the jacking piece 7 is fixed to the second end of the support rod 5. Further, the fixed block 4 and the first end of the support rod 5 are both provided with pin holes, and the hinge connection between the support rod 5 and the fixed block 4 is realized by passing a pin through the pin holes of the fixed block 4 and the support rod 5. The hinge connection mode can increase the degree of freedom of the support rod 5, and avoid damage to the inner wall of the shield shell 3 due to vibration of the cutter drum 1 during construction.

[0022] Preferably, the support rod 5 is two sections of butt joint, and the two sections of the support rod 5 are fixed by the flange 6 in axial butt joint. In the embodiment, the flange 6 is bolted, and the two support rods 5 can facilitate the tool replacement of the cutter drum 1. When the tool needs to be replaced, the support rod 5 close to the cutter drum 1 is disassembled in advance by using a hand-operated hoist, so that the tool can be replaced without disassembling the two support rods 5.

[0023] Preferably, as shown in Figure 3 Preferably, the reinforcing assembly further comprises a double washer 9 sleeved on the adjacent two bolts 2 and fixed on the corresponding two lock washers 8. In the embodiment, the double washer 9 is directly welded on the lock washers 8 of the adjacent bolts 2, so that the adjacent lock washers 8 are restrained by each other, thereby further preventing the bolts 2 from loosening or breaking.

[0024] The present application reduces the loosening of the bolts by the reinforcing assembly, and solves the problem of insufficient rigidity of the rear part of the cutter drum by the support assembly, thereby solving the technical problem that the flange bolts of the cutter drum of the shield machine are prone to loosening when the shield machine is used to construct a tunnel in a region with large hardness. The present application reduces the probability of loosening and breaking of the cutter drum, and prolongs the service life of the cutter drum bolts. The present application also reduces the time consumed for stopping the advance of the shield machine due to the replacement of the bolts, shortens the construction period, and reduces the construction cost. The present application prolongs the service life of the tool, reduces the probability of loosening and breaking of the cutter drum bolts, reduces the maintenance time, and improves the work efficiency.

[0025] The parts not involved in the present application are the same as or can be realized by the prior art. The above description is only the preferred embodiments of the present application, and does not limit the present application in any form. Although the present application has been disclosed as the preferred embodiments, it is not intended to limit the present application. Any skilled person in the art can make some changes or modifications to the above disclosed technical contents to make equivalent embodiments with equivalent changes, but as long as the changes do not deviate from the technical solution of the present application, any simple modification, equivalent change and modification of the above embodiments based on the technical essence of the present application are still within the scope of the technical solution of the present application.

Claims

1. A shield machine cutter cartridge reinforcement structure, characterized by, The bolt reinforcing assembly for reinforcing the bolt of the cutter drum flange comprises a pair of anti-loosening washers sleeved on the bolt one by one, and the support assembly detachably fixed to the rear part of the cutter drum comprises a support rod connected between the back of the cutter drum and the inner wall of the shield shell and maintained in abutment against the cutter drum. A first end of the support rod is fixed with a jacking piece providing the force for maintaining the abutment against the cutter drum.

2. The shield machine cutter cartridge reinforcement structure of claim 1, wherein, The axis of the support rod coincides with the axis of the cutter drum.

3. The shield machine cutter cartridge reinforcement structure of claim 1, wherein, A fixed block for the first end of the support rod is fixed on the inner wall of the shield shell, and the jacking piece is fixed on the second end of the support rod.

4. The shield machine cutter cartridge reinforcement structure of claim 1, wherein, The support rod is formed by two sections in axial abutment.

5. The shield machine cutter cartridge reinforcement structure of claim 1, wherein, The reinforcing assembly further comprises a double washer sleeved on two adjacent bolts and fixed on the corresponding two anti-loosening washers.

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