Anti-retraction inner cutter barrel

Abstract

The present application relates to a kind of anti-retreating inner cutter barrel, including inner cutter barrel, inner cutter barrel includes cutter barrel body, high-strength bearing block is equipped in the inside front end of cutter barrel body, high-strength bearing block is positioned with fixed block using positioning pin and is bolted with screw, tool is supported by high-strength bearing block big v-shaped opening, fixed block locks tool.Cutter barrel body middle part is provided with limiting block, limiting block cooperates with support plate, support plate is provided with anti-retreating adjusting screw, support fixed seat and adjust gap.Two-stage anti-retreating oil cylinder is connected with fixed seat and end cover, two-stage anti-retreating oil cylinder leads out back oil port and extension oil port.The combination forms primary mechanical support anti-retreating and two-stage hydraulic anti-retreating, primary anti-retreating makes that the load of working face is transmitted to cutter barrel body, reduces the bearing capacity of fixed screw, effectively prevent screw fracture and the problem that fixed block is retreated with tool, two-stage anti-retreating not only prevents the great impact injury of fixed seat back, but also is fed back whether tool and fixed seat are retreated failure by the change value of external oil pressure gauge, provides pre-judgment for solving the hidden high risk of working face excavation in time.

Description

Technical Field

[0001] This invention relates to an anti-retraction inner blade cylinder. Background Technology

[0002] In the construction of long-distance, deep tunnels, the inner cutterhead used by slurry balance shield tunneling machines (TBMs) for cutting tool replacement faces high-strength composite rock strata. Especially in extreme conditions such as encountering karst caves or soft-topped, hard-bottomed formations, not only do the cutters suffer wear, but the inner cutterhead itself is also subjected to alternating high and low pressure impact loads. Existing methods, such as using only hexagonal socket head cap screws to secure the inner cutterhead to the cutterhead, present two problems during face excavation: first, screw breakage frequently occurs, causing the cutterhead to loosen and retract; second, this loosening and retraction during cutting cannot be detected promptly, leading to low cutting efficiency and a significant risk of irreparable cutterhead wear. Summary of the Invention

[0003] The purpose of this invention is to provide an anti-retraction inner blade cylinder, solving the following technical problems:

[0004] (1) How to prevent the cutting tool and tool holder from coming loose from the inner tool holder;

[0005] (2) How to promptly detect and quickly resolve hidden risks after loosening.

[0006] The purpose of this invention is to provide an anti-retraction inner blade cylinder to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: an anti-reverse inner cutter cylinder, comprising an inner cutter cylinder body, wherein two high-strength bearing blocks are provided at the front end of the inner cutter cylinder body, the bearing blocks being placed opposite each other, the high-strength bearing blocks and the fixing blocks being positioned by positioning pins and bolted together by screws, the cutting tool being supported by the large V-shaped opening of the high-strength bearing blocks, and the fixing blocks locking the cutting tool, a limit block being provided in the middle of the cutter cylinder body, the limit block cooperating with a support plate, the support plate being provided with an anti-reverse adjustment screw, supporting the fixing seat and adjusting the gap, the fixing seat being connected to a secondary anti-reverse cylinder, the end of the secondary anti-reverse cylinder being connected to an end cap, and the secondary anti-reverse cylinder being connected to a return oil port and an extension oil port.

[0008] Preferably, four grooves are evenly distributed on the edge of the fixing block, each groove is the same size, the groove opening faces outward, and the angle between the groove and the center of the fixing block is α; the opening groove on the fixing block cooperates with the limiting block on the inner knife cylinder.

[0009] Preferably, the support plate has a circular center with four supports distributed around it. Each support has a positioning stop, and the inner side of the positioning stop has four evenly distributed threaded holes. The positioning stop of the support plate cooperates with the upper limit block of the tool cylinder. The threaded holes on the inner side of the positioning stop cooperate with the anti-reverse adjustment screw. When the support plate and the limit block on the tool cylinder cooperate, a difference is formed. The positioning stop on the support plate is designed to have a depth and the width dimension S1 must be greater than the limit block dimension S to prevent the primary mechanical anti-reverse force from rotating. The anti-reverse adjustment screw can press against the fixing block to form a primary anti-reverse.

[0010] Preferably, the secondary anti-reverse cylinder passes through the central ring of the support plate and connects to the end cap and the fixing block. The retraction port and the extension port are connected to the end cap through oil pipes. The secondary anti-reverse cylinder effectively forms a hydraulic buffer function and also forms a secondary anti-reverse function. Ball valves and pressure gauges are provided on the retraction port and the extension port.

[0011] Preferably, sealing rings are provided on the outer side of the cutter barrel in the axial direction and on the end cap in the radial direction.

[0012] Preferably, the assembly steps of the inner cutter cylinder are as follows: first, the high-strength bearing block and the fixing block are connected by positioning pins; then, the cutter is placed on the large V-shaped opening in conjunction with the first two; then, the first three are installed into the inner cutter cylinder body at an included angle α; then, the support plate and the anti-reverse adjustment limit screw are installed; finally, the secondary anti-reverse cylinder and the end cover are installed to form a complete inner cutter cylinder with anti-reverse function.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] (1) The bearing surface of the high-strength bearing block in this invention is uniformly hardened. The load of impact cutting and breaking hard rock layers is applied to the bearing surface. The bearing surface can not only resist high-strength impact, but also has toughness in the core, so that the load is elastic. At the same time, it will not cause creep, loosening and breakage of the connecting bolts, nor will it cause the overall instability and failure of the fixed block and the high-strength bearing block. The load is transferred to the cutter barrel body by further limiting and adjusting the primary mechanical anti-backward adjustment screw, which effectively ensures the safety of the cutter's tunneling roller.

[0015] (2) A two-stage hydraulic anti-reverse cylinder is connected to a fixed block at one end and an end cap at the other end. By extending the oil port 2 and applying pressure, the piston rod at one end of the fixed block presses against the fixed block and its components, which can form a two-stage anti-reverse risk of the tool retraction and further ensure safety under extreme working conditions such as breaking high hard rock and alternating loads.

[0016] (3) On the ball valve and pressure gauge connected to the end cap, when the tool is cutting the rock layer, we can intuitively understand the load in the concealed environment. At the same time, we can also predict whether the tool will loosen and retract based on the change of data value, which also provides favorable data support for the next step of construction. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of one embodiment of the present invention;

[0018] Figure 2 This is a load diagram of one embodiment of the present invention;

[0019] Figure 3 This is a top view of the limiting block of the present invention;

[0020] Figure 4 This is a front view of the fixing block of the present invention;

[0021] Figure 5 This is a structural diagram of the support plate of the present invention;

[0022] Figure 6 This is a large V-shaped diagram of the high-strength load-bearing block of the present invention;

[0023] Figure 7 This is a flowchart of the assembly process of the inner blade cylinder of the present invention.

[0024] The numbers in the diagram represent: 5, fixing block; 101, cutting tool; 200, high-strength bearing block; 301, fixing block; 400, limiting block; 501, anti-reverse adjusting screw; 600, positioning pin; 701, cutting tool body; 801, support plate; 807, secondary anti-reverse cylinder; 901, end cap; 903, return oil port; 904, extension oil port; 918, bolt; 966, pressure gauge; 967, ball valve. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] Please see Figure 1 , 34, 5, and 6, the present invention provides a technical solution: The present invention is an anti-reverse inner cutter cylinder, comprising an inner cutter cylinder body 701. Two high-strength bearing blocks 200 are provided at the front end of the inner cutter cylinder body 701, and the bearing blocks 200 are placed opposite each other. The high-strength bearing blocks 200 and the fixing blocks 301 are positioned by positioning pins 600 and fastened by screws 930. The large V-shaped opening of the high-strength bearing blocks 200 supports the cutter 101, and the fixing blocks 301 lock the cutter 101. A limit block 400 is provided in the middle of the cutter cylinder body 701, which cooperates with a support plate 801. An anti-reverse adjustment screw 501 is provided on the support plate 801, supporting a fixing seat 5. A secondary anti-reverse cylinder 807 connects the fixing seat 5 and the end cap 901. The secondary anti-reverse cylinder 807 has a retraction port 903 and an extension port 904.

[0027] Specifically, for the locally hardened high-strength bearing block, the effective and uniform distribution of dense and refined martensite structure can overcome the crushing and cracking of the bearing block. The large V-shaped opening formed by the high-strength bearing block ensures stable positioning and force distribution of the tool. The high-strength bearing block and the fixing block are positioned with eight locating pins to prevent shearing and rotation, while ensuring that the two are integrated. The tool is then bolted to the inner cylinder with screws according to the torque, further forming a unified assembly of the tool, high-strength bearing block, and fixing block. This integrated assembly also ensures unified force distribution. The stability of the locally hardened slope of the high-strength bearing block also ensures that there are no gaps or loosening among the three components, reducing the probability of bolt breakage.

[0028] Four grooves are evenly distributed on the edge of the fixing block 301. Each groove is the same size, with its opening facing outwards, and the angle between the groove and the center of the fixing block is α. This ensures that the fixing block can be inserted into the tool barrel at the correct angle, guaranteeing the correct position of the tool. Simultaneously, the opening groove size F on the fixing block matches the limiting block size S on the inner tool barrel, with the final value F being greater than S.

[0029] The support plate has a central ring shape with four supports distributed around it. Each support has a positioning stop with four evenly distributed threaded holes on its inner side. The positioning stop of the support plate mates with the upper limit block of the tool barrel, and the threaded holes on the inner side of the positioning stop mate with the anti-reverse adjustment screw. When the support plate mates with the limit block on the tool barrel, a difference is formed. The positioning stop on the support plate has a depth, and its width S1 must be greater than the limit block's size S to prevent rotation under force during primary mechanical anti-reverse. The anti-reverse adjustment screw can press against the fixing block, forming primary anti-reverse.

[0030] The secondary anti-reverse cylinder passes through the central ring of the support plate and connects to the end cap and the fixing block. The retraction port and the extension port are connected to the end cap through oil pipes. The secondary anti-reverse cylinder effectively forms a hydraulic buffer function and also forms a secondary anti-reverse function. By installing ball valve 967 and pressure gauge 966 on the retraction port and the extension port, it can ensure rapid pressure anti-reverse and detection of hidden risk sources.

[0031] Sealing rings are installed axially on the outer side of the cutter barrel and radially on the end cap to prevent backflow of the slurry and ensure the cleanliness of the atmospheric pressure zone.

[0032] pass Figure 2 We know that under the entire rock breaking condition, the load 1 formed by the rock strata is transmitted to the cutting tool, the high-strength bearing block and the fixing block, and then the load 2, which is converted by energy, is transmitted to the support plate and the limit adjustment screw to stop the backlash. At the same time, the loads 3 and 4 on the rear cover and the cutter body of the secondary backlash cylinder bear the load 1 formed by rock breaking.

[0033] Figure 7 As shown, we can assemble the inner cutter cylinder according to the optimized assembly flowchart. First, connect the high-strength bearing block and the fixing block with the positioning pins. Then, place the cutter and the two components onto the large V-shaped opening. Next, install the first three components onto the inner cutter cylinder at angle 'a'. Then, install the support plate and the anti-reverse adjustment limit screw. Finally, install the secondary anti-reverse cylinder and end cap to form a complete inner cutter cylinder with anti-reverse function.

[0034] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An anti-recoil inner blade cylinder, comprising an inner blade cylinder body, characterized in that: The front end of the cutter barrel is provided with two high-strength bearing blocks, which are placed opposite each other. The high-strength bearing blocks and the fixing blocks are positioned by positioning pins and bolted together with screws. The cutting tool is supported by the large V-shaped opening of the high-strength bearing blocks, and the cutting tool is locked by the fixing blocks. A limit block is provided in the middle of the cutter barrel. The limit block cooperates with the support plate. The support plate is provided with a backstop adjustment screw, which supports the fixing seat and adjusts the gap. The fixing seat is connected to a secondary backstop cylinder. The end of the secondary backstop cylinder is connected to an end cap. The secondary backstop cylinder is connected to a return oil port and an extension oil port.

2. The anti-retraction inner blade cylinder according to claim 1, characterized in that: Four grooves are evenly distributed on the edge of the fixing block. Each groove is the same size, with its opening facing outwards and forming an angle α with the center of the fixing block. The opening groove on the fixing block cooperates with the limiting block on the inner knife cylinder.

3. The anti-retraction inner knife cylinder according to claim 1, characterized in that: The support plate has a circular center with four supports distributed around it. Each support has a positioning stop, and the inner side of the positioning stop has four evenly distributed threaded holes. The positioning stop of the support plate mates with the upper limit block of the cutter barrel. The threaded holes on the inner side of the positioning stop mate with the anti-reverse adjustment screw. When the support plate and the limit block on the cutter barrel mate, a difference is formed. The positioning stop on the support plate has a depth and its width S1 must be greater than the limit block size S to prevent the primary mechanical anti-reverse force from rotating. The anti-reverse adjustment screw can press against the fixing block to form a primary anti-reverse.

4. The anti-retraction inner blade cylinder according to claim 1, characterized in that: The secondary anti-reverse cylinder passes through the central ring of the support plate and connects to the end cap and the fixing block. The retraction port and the extension port are connected to the end cap through oil pipes. The secondary anti-reverse cylinder effectively forms a hydraulic buffer function and also forms a secondary anti-reverse function. Ball valves and pressure gauges are provided on the retraction port and the extension port.

5. The anti-retraction inner blade cylinder according to claim 1, characterized in that: The outer side of the cutter barrel is provided with sealing rings axially and radially on the end cap.

6. The anti-retraction inner blade cylinder according to claim 2, characterized in that: The assembly steps of the inner cutter cylinder are as follows: first, connect the high-strength bearing block and the fixing block with the positioning pin combination; then, place the cutter and the first two together on the large V-shaped opening; then, install the first three into the inner cutter cylinder body at an included angle α; then, install the support plate and the anti-reverse adjustment limit screw; finally, install the secondary anti-reverse cylinder and the end cover to form a complete inner cutter cylinder with anti-reverse function.

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