Knife barrel anti-stuck device

Abstract

The present invention proposes a knife barrel anti-stuck device, comprising a knife barrel, the front end of the knife barrel is provided with a flushing ring groove located on the side, the front end of the knife barrel is lower than the rear end of the flushing ring groove, and a new flushing channel extends to the flushing ring groove. The advantages of the present invention are: 1) accurate flushing of the knife barrel can be achieved, effectively preventing the knife barrel from being stuck or scratched; 2) abnormal damage to the knife barrel can be reduced, and the efficiency and safety of knife changing can be improved.

Description

Technical Field

[0001] The invention relates to tunnel excavation equipment, in particular to a cutter barrel anti-jamming device. Background Art

[0002] In the past 10 to 20 years, shield tunnels are moving towards larger diameters and greater burial depths. Large-diameter slurry shield technology has been increasingly used in engineering projects, but it still faces many challenges when crossing ultra-high water pressure and complex strata for excavation construction. As the core component of the shield, the cutterhead tool is directly responsible for the excavation of the rock strata. However, the underground rock strata have uneven hardness, isolated rocks, boulders, caves, high-strength rocks and even pile foundations. The probability of tool wear, abnormal damage and loosening is very high. For complex strata, a cutterhead with a diameter of about 15m may need to check and replace the tool more than 50 times for 1 kilometer of excavation. The biggest challenge of large-diameter slurry shield construction is to check and replace the tool under ultra-high water pressure. Therefore, the demand for shield machines with normal pressure tool change function will also increase.

[0003] However, due to the complex geology, there are a lot of mud, sand and stones in the mud and water tank, and the existing flushing system cannot flush accurately. Figure 1 When the position is reached, a closed cavity will be formed, and flushing will not work at this time, so Figure 2 The black part of the cutter can easily retain stones and get stuck in the cutter barrel, causing problems such as the cutter barrel getting stuck and the front end of the cutter barrel being scratched, making it difficult to change the cutter, affecting the excavation efficiency, and even causing water gushing in the shield machine. Summary of the invention

[0004] The present invention proposes a knife barrel anti-stuck device, which adds a precise flushing structure, solves the problem that the existing knife barrel is easily stuck or scratched due to inaccurate flushing, effectively prevents the knife barrel from being stuck or scratched, and improves the knife changing efficiency and safety.

[0005] The technical solution of the present invention is implemented as follows: a knife barrel anti-stuck device includes a knife barrel, the front end of the knife barrel is provided with a flushing ring groove located on the side, the portion of the knife barrel located at the front end of the flushing ring groove is lower than the portion located at the rear end of the flushing ring groove, and a new flushing channel extends to the flushing ring groove.

[0006] The knife barrel comprises a reduced diameter section, on which a flushing annular groove is arranged on the side, and a portion of the reduced diameter section located at the front end of the flushing annular groove is lower than a portion located at the rear end of the flushing annular groove.

[0007] It also includes a welding seat, which includes an expanded diameter section, a transition section I and a full diameter section I. The cutter barrel also includes a transition section II and a full diameter section II. The reduced diameter section located at the rear end of the flushing ring groove cooperates with the expanded diameter section, the transition section I cooperates with the transition section II, and a gap is left between the full diameter section I and the full diameter section II.

[0008] The portion of the reduced diameter section located at the rear end of the flushing annular groove is provided with a seal.

[0009] The part of the reduced diameter section located at the front end of the flushing annular groove is provided with an inclined end surface.

[0010] The knife cylinder is connected to the knife seat, and the knife cylinder is connected to the end cover.

[0011] The knife seat is provided with a rolling knife, a cutting knife or a tearing knife.

[0012] The welding seat is connected with the upper sealing seat, a gate is arranged between the upper sealing seat and the lower sealing seat, and an original flushing hole is arranged on the lower sealing seat.

[0013] The new flushing channel comprises a flushing pipe and an inner groove. The flushing pipe passes through the inner groove of the knife barrel, the knife seat and the end cover and extends to the flushing ring groove.

[0014] The flushing pipe is provided with a valve located at the end cover.

[0015] The advantages of the present invention are as follows: 1) accurate flushing of the knife barrel can be achieved, effectively preventing the knife barrel from being stuck or scratched; 2) abnormal damage to the knife barrel can be reduced, and the efficiency and safety of knife changing can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 It is a schematic diagram of the existing knife barrel flushing structure.

[0018] Figure 2 for Figure 1 Enlarged view of point I in FIG.

[0019] Figure 3 It is a schematic diagram of the structure of the present invention.

[0020] Figure 4 Schematic diagram I of knife barrel knife change of the present invention.

[0021] Figure 5 for Figure 4 Enlarged view of point II in the figure.

[0022] Figure 6 This is a schematic diagram II of the knife barrel changing tool of the present invention.

[0023] Figure 7 for Figure 6 Enlarged view of point III in the figure.

[0024] Figure 8 It is a schematic diagram of the knife barrel structure of the present invention.

[0025] Fig. 9 for Figure 8 Enlarged view of point IV in the middle.

[0026] In the figure: 1-welding seat, 2-knife cylinder, 3-upper sealing seat, 4-gate, 5-knife seat, 6-lower sealing seat, 7-original flushing hole, 8-new flushing channel, 9-end cover. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] like Figure 3 , 8 As shown in Figure 9, a knife barrel anti-stuck device includes a welding seat 1 and a knife barrel 2, the welding seat 1 is connected to the upper sealing seat 3, a gate 4 is provided between the upper sealing seat 3 and the lower sealing seat 6, the lower sealing seat 6 is provided with an original flushing hole 7, the knife barrel 2 is connected to the knife seat 5, the knife barrel 2 is connected to the end cover 9, the knife barrel 2 is detachably connected to the lower sealing seat 6, and the knife seat 5 is provided with a roller, a cutting knife or a tearing knife.

[0029] The welding seat 1 includes an expanding section, a transition section I and a full diameter section I, the knife barrel 2 includes a reducing section, a transition section II and a full diameter section II, a flushing annular groove is provided on the reducing section, the part of the reducing section located at the front end of the flushing annular groove is lower than the part located at the rear end of the flushing annular groove, and the height difference is h, the part of the reducing section located at the rear end of the flushing annular groove cooperates with the expanding section, the transition section I cooperates with the transition section II, a gap is left between the full diameter section I and the full diameter section II, the new flushing channel 8 includes a flushing pipe and an inner groove, the flushing pipe passes through the knife barrel 2, the knife seat 5 and the inner groove of the end cover 9 and extends to the flushing annular groove, and a valve located at the end cover 9 is provided on the flushing pipe.

[0030] The part of the reduced diameter section located at the rear end of the scouring annular groove is provided with a seal to ensure the sealing cooperation between the expanded diameter section and the part of the reduced diameter section located at the rear end of the scouring annular groove. The part of the reduced diameter section located at the front end of the scouring annular groove is provided with an inclined end surface to facilitate the scouring of water flow.

[0031] like Figures 4 to 7As shown, during the process of pushing the knife barrel in, after opening the gate, the original flushing hole is used, and then the new flushing channel is used. High-pressure water can directly reach the flushing ring groove of the reduced diameter section along the flushing pipe. The part of the reduced diameter section close to the front end of the mud and water bin is lower than the part close to the rear end of the cutter disc drive. Therefore, the flushing water can be concentrated to flush the sand, gravel and other impurities trapped in the sealing seat and the welding seat to the mud and water bin. Even after approaching the welding seat, a ring-shaped water tank can be formed to flush forward, and no closed cavity will be formed, thereby achieving smooth pushing and avoiding scratches on the knife barrel. During the process of pulling out the knife barrel, for the reverse process of pushing in, a new flushing channel is opened to block the mud and gravel in the mud and water bin from contacting the front end of the knife barrel, avoiding the knife barrel from getting stuck or causing scratches on the front end of the knife barrel, and completing the pulling out process.

[0032] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A knife barrel anti-jamming device, comprising a knife barrel (2), characterized in that: The front end of the knife barrel (2) is provided with a flushing annular groove on the side, the front end of the knife barrel (2) is lower than the rear end of the flushing annular groove, and the new flushing channel (8) extends to the flushing annular groove; The knife barrel (2) comprises a reduced diameter section, the reduced diameter section is provided with a flushing annular groove located on the side, and the portion of the reduced diameter section located at the front end of the flushing annular groove is lower than the portion located at the rear end of the flushing annular groove; It also includes a welding seat (1), the welding seat (1) includes an expanded diameter section, a transition section I and a normal diameter section I, the knife barrel (2) also includes a transition section II and a normal diameter section II, the reduced diameter section located at the rear end of the flushing annular groove cooperates with the expanded diameter section, the transition section I cooperates with the transition section II, and a gap is left between the normal diameter section I and the normal diameter section II; The part of the reduced diameter section located at the rear end of the flushing annular groove is provided with a seal; the part of the reduced diameter section located at the front end of the flushing annular groove is provided with an inclined end surface; During the process of pushing the knife barrel in, after opening the gate, the original flushing hole is used while the new flushing channel is used. The high-pressure water can directly reach the flushing ring groove of the reduced diameter section along the flushing pipe. The part of the reduced diameter section close to the front end of the mud and water bin is lower than the part close to the rear end of the cutter disc drive. Therefore, the flushing water can be concentrated to flush the sand and gravel retained in the sealing seat and the welding seat to the mud and water bin. Even after approaching the welding seat, a ring-shaped water groove can be formed to flush forward without forming a closed cavity, thereby realizing the smooth pushing of the knife barrel and avoiding scratches on the knife barrel. During the process of pulling out the knife barrel, for the reverse process of pushing in, a new flushing channel is opened to block the mud and gravel in the mud and water bin from contacting the front end of the knife barrel, thereby avoiding jamming of the knife barrel or causing scratches on the front end of the knife barrel, and completing the pulling out process.

2. The knife barrel anti-jamming device according to claim 1, characterized in that: The knife cylinder (2) is connected to the knife seat (5), and the knife cylinder (2) is connected to the end cover (9).

3. The knife barrel anti-jamming device according to claim 2, characterized in that: The knife seat (5) is provided with a rolling knife, a cutting knife or a tearing knife.

4. The knife barrel anti-jamming device according to claim 1, characterized in that: The welding seat (1) is connected to the upper sealing seat (3), a gate (4) is provided between the upper sealing seat (3) and the lower sealing seat (6), and an original flushing hole (7) is provided on the lower sealing seat (6).

5. The knife barrel anti-jamming device according to claim 2, characterized in that: The new flushing channel (8) comprises a flushing pipe and an inner groove, wherein the flushing pipe passes through the inner groove of the knife barrel (2), the knife seat (5) and the end cover (9) and extends to the flushing ring groove.

6. The knife barrel anti-jamming device according to claim 5, characterized in that: The flushing pipe is provided with a valve located at the end cover (9).

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