Cutter head of tube push bench

Abstract

The utility model discloses a cutter head of a pipe jacking machine, and relates to the technical field of pipe jacking machines. A pipe push bench cutter head comprises a cutter head body, a fixing block is installed in the cutter head body, the fixing block extends out of the cutter head body and is fixedly connected with a cutter head, the cutter head is in a cross shape, cutting blades are installed on the cutter head body and distributed in an array mode, crushing cutters are installed on the cutter head body and distributed in an array mode, and the crushing cutters are located on one sides of the cutting blades. A plurality of first openings distributed in an array mode are formed in the cutter head body, a plurality of second openings distributed in an array mode are formed in the cutter head body, a plurality of supporting plates are fixed in the cutter head body, and adjusting mechanisms are arranged between the supporting plates and the cutter head body. And through the adjusting mechanism, a worker can conveniently replace the blade according to a tunneled soil layer and a tunneled rock layer, the tunnelling efficiency is improved, pipeline burying is facilitated, abrasion of the blade is reduced, the service life is prolonged, and use is convenient.

Description

Technical Field

[0001] The present application relates to the technical field of pipe jacking machines, and in particular to a cutter head of a pipe jacking machine. Background Art

[0002] Pipe jacking construction is a trenchless construction method, which is a pipeline burying construction technology with little or no excavation. Pipe jacking method construction is to generate thrust in the working pit with the help of the thrust generated by the jacking equipment, overcome the friction between the pipeline and the surrounding soil, jack the pipeline into the soil according to the designed slope, and transport the soil away. After one pipe is jacked into the soil layer, the second pipe is lowered and the jacking continues.

[0003] A cutter head of a pipe jacking machine mentioned in the existing Chinese published patent (authorization publication number: CN209067216U) includes a cutter head body and a main cutter body arranged in the middle of the cutter head body. The main cutter body is detachably connected to the cutter head body; a through groove is opened on the cutter head body, and a stirring rod is fixedly connected in the through groove; one end of the main cutter body away from the cutter head body is a conical surface, and several groups of cutter blades are detachably connected to the surface of the main cutter body. Each group of cutter blades includes a first cutter blade and a second cutter blade; one side of the main cutter body is a conical surface, and the tip of the conical surface has a small force-bearing area, so it is convenient to push forward, thus facilitating construction; several groups of cutter blades on the main cutter body scrape the soil, thus facilitating the forward movement of the cutter head; each group of cutter blades includes a first cutter blade and a second cutter blade, thus facilitating the scraping of the soil and facilitating construction.

[0004] When the cutter head of the pipe jacking machine is in use, it is used for pipeline burying. The cutter head on the pipe jacking machine is used to excavate the soil or rock stratum, and the excavated soil is transported away to facilitate the jacking and burying of the pipeline. However, the cutter blades of the above device are relatively fixed during excavation, which is not convenient for workers to switch the cutter heads according to the excavated soil layer or rock stratum. Ordinary cutter heads are easily worn and damaged when cutting rocks, and the broken cutter heads are prone to over-cutting when facing the soil layer, which easily causes the broken cutter heads to accelerate wear, and thus is not convenient for the use of the cutter head of the pipe jacking machine. Summary of the Utility Model

[0005] The purpose of the present application is to solve the problem that the cutter blades of the above device are relatively fixed during excavation, which is not convenient for workers to switch the cutter heads according to the excavated soil layer or rock stratum. Ordinary cutter heads are easily worn and damaged when cutting rocks, and the broken cutter heads are prone to over-cutting when facing the soil layer, which easily causes the broken cutter heads to accelerate wear, and thus is not convenient for the use of the cutter head of the pipe jacking machine. The present application provides a cutter head of a pipe jacking machine.

[0006] The present application specifically adopts the following technical solutions to achieve the above purpose:

[0007] A pipe jacking machine cutter head, including a cutter head body, a fixing block is installed inside the cutter head body, the fixing block extends out of the cutter head body and is fixedly connected with a cutter head, the cutter head is cross-shaped, cutting blades are installed on the cutter head body and are distributed in an array, crushing knives are installed on the cutter head body and are distributed in an array, the crushing knives are located on one side of the cutting blades, a plurality of first openings distributed in an array are formed on the cutter head body, a plurality of second openings distributed in an array are formed on the cutter head body, a plurality of support plates are fixed inside the cutter head body, and an adjusting mechanism is arranged between the support plates and the cutter head body.

[0008] By adopting the above technical solutions, through the adjusting mechanism, it is convenient for the staff to replace the blades according to the excavated soil layer and rock layer, improve the excavation efficiency, facilitate the laying of pipelines, reduce the wear of the blades, increase the service life, and facilitate the use.

[0009] Further, the adjusting mechanism includes a first hydraulic telescopic rod fixed on the support plate, a plurality of moving plates are arranged at the telescopic end of the first hydraulic telescopic rod, the moving plates are rotatably connected with the crushing knives, the crushing knives are slidably arranged with the cutter head body, and a limiting component is arranged between the moving plates and the support plate.

[0010] By adopting the above technical solutions, when the first hydraulic telescopic rod expands and contracts, the moving plates move to drive the crushing knives to move, and the crushing knives extend out of the cutter head body, so that the extending height of the crushing knives is higher than that of the cutting blades, which is convenient for adjusting the blades.

[0011] Further, the limiting component includes a limiting rod fixed on the support plate, the limiting rod is located on one side of the first hydraulic telescopic rod, a fixing plate is fixedly connected to the telescopic end of the first hydraulic telescopic rod, the fixing plate is fixedly connected with the moving plate, and the limiting rod slidably penetrates through the fixing plate.

[0012] By adopting the above technical solutions, the fixing plate slides on the limiting column to limit the fixing plate, which is convenient for the movement of the moving plate.

[0013] Further, two symmetrical limiting frames are fixed inside the cutter head body, the limiting frames are L-shaped, the limiting frames correspond to the second openings, an adjusting plate is slidably arranged between the limiting frames and the cutter head body, both sides of the adjusting plate are located inside the limiting frames, one end of the adjusting plate is fixed with a second hydraulic telescopic rod, the telescopic end of the second hydraulic telescopic rod corresponds to the adjusting plate, and a supporting component is arranged between the limiting frames and the cutter head body.

[0014] By adopting the above technical solutions, the second hydraulic telescopic rod expands and contracts to drive the adjusting plate to move, and the movement of the adjusting plate is convenient for adjusting the size of the second opening, so that the adjusting plate slides inside the limiting frame, and the movement of the adjusting plate is convenient for adjusting the size of the second opening.

[0015] Furthermore, the support assembly includes a support block fixed inside the cutter head body. The support block is fixedly connected to the second hydraulic extension rod. A limiting post is fixed on the side of the support block away from the hydraulic extension rod, and the limiting post extends into the adjusting plate and is slidably arranged.

[0016] By adopting the above technical solution, the adjusting plate slides on the limiting post, facilitating the movement restriction of the adjusting plate.

[0017] Furthermore, the cutter head body, the cutting blade, the crushing knife, and the cutter head are all made of silicon chromium alloy, and the first opening is triangular.

[0018] By adopting the above technical solution, the cutter head body, the cutting blade, the crushing knife, and the cutter head are all made of silicon chromium alloy, which is convenient for improving the wear resistance, high-temperature resistance of the cutter head body, the cutting blade, the crushing knife, and the cutter head, increasing the hardness, and extending the service life. With the first opening being triangular, it is convenient for the discharge of soil.

[0019] Furthermore, wear-resistant strips are fixed on the cutter head body and are distributed in an array. The wear-resistant strips are made of ultra-high molecular weight polyethylene.

[0020] By adopting the above technical solution, since the wear-resistant strips are made of ultra-high molecular weight polyethylene, it is convenient to reduce the contact between the cutter head body and the soil, enabling the wear-resistant strips to be in contact with the excavated soil layer, facilitating the improvement of the wear resistance of the cutter head body and reducing the wear of the cutter head body.

[0021] Furthermore, a plurality of cutting blocks are fixed at the upper end of the cutter head body. The cutting blocks are located on one side of the crushing knife, and both the cutting blocks and the cutting blade are trapezoidal.

[0022] By adopting the above technical solution, both the cutting blocks and the cutting blade are trapezoidal, which is convenient for improving the cutting efficiency of the cutting blade and the cutting blocks, reducing the vibration during the cutting process, and reducing wear.

[0023] In summary, the present application includes at least one of the following beneficial effects:

[0024] 1. When the cutter head needs to be replaced, the first hydraulic extension rod expands and contracts to move the fixed plate. The movement of the fixed plate causes the moving plate to move, and the movement of the moving plate drives the crushing knife to move. The crushing knife extends out of the cutter head body, making the extension height of the crushing knife higher than that of the cutting blade. At the same time, the fixed plate slides on the limiting post to restrict the fixed plate, facilitating the movement of the moving plate, enabling the crushing blade to contact and excavate the rock layer. When facing the soil layer, the first hydraulic extension rod expands and contracts to drive the crushing knife to descend, with the extension height lower than that of the cutting blade, facilitating excavation and reducing the situation of excessive cutting. Through the adjustment mechanism, it is convenient for the staff to replace the blades according to the excavated soil layer and rock layer, improving the excavation efficiency, facilitating the laying of pipelines, reducing the wear of the blades, and extending the service life.

[0025] 2. When the cutter head of the pipe jacking machine is in use, start the second hydraulic telescopic rod. The telescopic movement of the second hydraulic telescopic rod drives the adjustment plate to move. The movement of the adjustment plate facilitates adjusting the size of the second opening, enabling the adjustment plate to slide within the limiting frame for restriction. At the same time, the adjustment plate slides on the limiting column to facilitate the movement restriction of the adjustment plate. When tunneling through hard rock formations, the second opening becomes smaller. In the case of large changes in geological conditions, appropriately reducing the opening ratio can reduce the cutting resistance, lower the equipment load, and prevent equipment damage due to overload. When tunneling through soil layers, the second opening becomes larger, improving the adaptability and flexibility of tunneling and facilitating tunneling. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is the first structural schematic diagram of the cutter head of the pipe jacking machine in this application.

[0027] Figure 2 is the second structural schematic diagram of the cutter head of the pipe jacking machine in this application.

[0028] Figure 3 is the third structural schematic diagram of the cutter head of the pipe jacking machine in this application.

[0029] Figure 4 is in this application Figure 3 The enlarged structural schematic diagram at position A in

[0030] Description of the reference numerals:

[0031] 1. Cutter head body; 2. Fixed block; 3. Cutter head; 4. Cutting blade; 5. Crushing knife; 6. First opening; 7. Second opening; 8. Support plate; 9. First hydraulic telescopic rod; 10. Fixed plate; 11. Moving plate; 12. Limiting rod; 13. Limiting frame; 14. Adjustment plate; 15. Support block; 16. Second hydraulic telescopic rod; 17. Limiting column; 18. Wear-resistant strip; 19. Cutting block. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0032] The following Figures 1-4 further elaborates on this application in detail.

[0033] The embodiment of this application discloses a cutter head of a pipe jacking machine.

[0034] Refer to Figure 1 and Figure 2, A cutter head of a pipe jacking machine, including a cutter head body 1, a fixing block 2 is installed inside the cutter head body 1, the fixing block 2 extends out of the cutter head body 1 and is fixedly connected with a cutter head 3, the cutter head 3 is cross-shaped, cutting blades 4 are installed on the cutter head body 1 and are distributed in an array, crushing knives 5 are installed on the cutter head body 1 and are distributed in an array, the crushing knives 5 are located on one side of the cutting blades 4, a plurality of first openings 6 distributed in an array are formed on the cutter head body 1, a plurality of second openings 7 distributed in an array are formed on the cutter head body 1, a plurality of support plates 8 are fixed inside the cutter head body 1, and an adjusting mechanism is arranged between the support plates 8 and the cutter head body 1.

[0035] When the cutter head of the pipe jacking machine is in use, the staff installs the cutter head body 1 on the pipe jacking machine, corresponding to the power source, and drives the cutter head 3 to excavate the soil or rock layer through the power source. At the same time, the cutting blades 4 are used to cut the soil, and the first openings 6 and the second openings 7 facilitate the discharge of the cut soil. During excavation, through the adjusting mechanism, it is convenient for the staff to replace the blades according to the excavated soil layer and rock layer, improve the excavation efficiency, facilitate the laying of the pipeline, reduce the wear of the blades, increase the service life, and facilitate the use.

[0036] Refer to Figures 2-4 , The adjusting mechanism includes a first hydraulic telescopic rod 9 fixed on the support plate 8, a plurality of moving plates 11 are arranged at the telescopic end of the first hydraulic telescopic rod 9, the moving plates 11 are rotatably connected with the crushing knives 5, the crushing knives 5 are slidably arranged with the cutter head body 1, and a limiting component is arranged between the moving plates 11 and the support plate 8. The limiting component includes a limiting rod 12 fixed on the support plate 8, the limiting rod 12 is located on one side of the first hydraulic telescopic rod 9, the telescopic end of the first hydraulic telescopic rod 9 is fixedly connected with a fixing plate 10, the fixing plate 10 is fixedly connected with the moving plate 11, and the limiting rod 12 slidably penetrates through the fixing plate 10. Two symmetrical limiting frames 13 are fixed inside the cutter head body 1, the limiting frames 13 are L-shaped, the limiting frames 13 correspond to the second openings 7, an adjusting plate 14 is slidably arranged between the limiting frames 13 and the cutter head body 1, both sides of the adjusting plate 14 are located inside the limiting frames 13, one end of the adjusting plate 14 is fixed with a second hydraulic telescopic rod 16, the telescopic end of the second hydraulic telescopic rod 16 corresponds to the adjusting plate 14, and a supporting component is arranged between the limiting frames 13 and the cutter head body 1. The supporting component includes a supporting block 15 fixed inside the cutter head body 1, the supporting block 15 is fixedly connected with the second hydraulic telescopic rod 16, and a limiting column 17 is fixed on the side of the supporting block 15 away from the hydraulic telescopic rod, and the limiting column 17 extends into the adjusting plate 14 and is slidably arranged.

[0037] When the cutter head of the pipe jacking machine is in use, when the cutter head 3 needs to be replaced, the hydraulic telescopic rod 9 is started. The telescopic movement of the hydraulic telescopic rod 9 causes the fixed plate 10 to move. The movement of the fixed plate 10 causes the moving plate 11 to move. The movement of the moving plate 11 drives the crushing cutter 5 to move. The crushing cutter 5 extends out of the cutter head body 1, so that the extending height of the crushing cutter 5 is higher than that of the cutting blade 4. At the same time, the fixed plate 10 slides on the limiting column 17 to limit the fixed plate 10, facilitating the movement of the moving plate 11, enabling the crushing cutter 5 to contact the rock stratum for tunneling, reducing the wear of the cutting blade 4. When facing the soil layer, the hydraulic telescopic rod 9 expands and contracts, driving the crushing cutter 5 to descend, and the extending height is lower than that of the cutting blade 4, facilitating tunneling and reducing the situation of excessive cutting and wear. Through the adjustment mechanism, it is convenient for the staff to replace the blades according to the soil layer and rock layer during tunneling, improving the tunneling efficiency, facilitating the laying of pipelines, reducing the wear of the blades, increasing the service life, and being convenient for use. During tunneling, the hydraulic telescopic rod 16 is started. The telescopic movement of the hydraulic telescopic rod 16 drives the adjusting plate 14 to move. The movement of the adjusting plate 14 facilitates the adjustment of the size of the second opening 7, enabling the adjusting plate 14 to slide within the limiting frame 13 to limit the adjusting plate 14. At the same time, the adjusting plate 14 slides on the limiting column 17, facilitating the movement limitation of the adjusting plate 14. When tunneling through a hard rock stratum, the second opening 7 becomes smaller. In the case of large changes in geological conditions, appropriately reducing the opening ratio can reduce the cutting resistance, lower the equipment load, and prevent the equipment from being damaged due to overload. When tunneling through the soil layer, the second opening 7 becomes larger, improving the adaptability and flexibility of tunneling and facilitating tunneling.

[0038] Refer to Figure 1 and Figure 2 The cutter head body 1, the cutting blade 4, the crushing cutter 5, and the cutter head 3 are all made of silicon chromium alloy. The first opening 6 is triangular. Wear-resistant strips 18 are fixed on the cutter head body 1 and are distributed in an array. The wear-resistant strips 18 are made of ultra-high molecular weight polyethylene. A plurality of cutting blocks 19 are fixed to the upper end of the cutter head body 1. The cutting blocks 19 are located on one side of the crushing cutter 5. The cutting blocks 19 and the cutting blade 4 are both trapezoidal.

[0039] When the cutter head of the pipe jacking machine is in use, the cutter head body 1, the cutting blade 4, the crushing cutter 5, and the cutter head 3 are all made of silicon chromium alloy, which is convenient for improving the wear resistance, high-temperature resistance, and hardness of the cutter head body 1, the cutting blade 4, the crushing cutter 5, and the cutter head 3, and extending the service life. Through the first opening 6 being triangular, it is convenient for the discharge of soil. Through the wear-resistant strips 18 being made of ultra-high molecular weight polyethylene, it is convenient for reducing the contact between the cutter head body 1 and the soil, enabling the wear-resistant strips 18 to be used for contact with the soil layer during tunneling, facilitating the improvement of the wear resistance of the cutter head body 1 and reducing the wear of the cutter head body 1. The cutting blocks 19 and the cutting blade 4 are both trapezoidal, which is convenient for improving the cutting efficiency of the cutting blade 4 and the cutting blocks 19, reducing the vibration during the cutting process, and reducing wear.

[0040] The implementation principle of the cutter head of the pipe jacking machine in this embodiment is as follows: When the cutter head of the pipe jacking machine is in use, the staff installs the cutter head body 1 on the pipe jacking machine, corresponding to the power source. The cutter head 3 is driven by the power source to excavate the soil or rock formation. At the same time, the cutting blade 4 cuts the soil, and the first opening 6 and the second opening 7 facilitate the discharge of the cut soil.

[0041] When the cutter head of the pipe jacking machine is in use and the cutter head 3 needs to be replaced, the hydraulic telescopic rod 1 9 is started. The telescopic movement of the hydraulic telescopic rod 1 9 causes the fixed plate 10 to move. The movement of the fixed plate 10 causes the moving plate 11 to move. The movement of the moving plate 11 drives the crushing knife 5 to move. The crushing knife 5 extends out of the cutter head body 1, so that the extension height of the crushing knife 5 is higher than that of the cutting blade 4. At the same time, the fixed plate 10 slides on the limiting column 17 to limit the fixed plate 10, facilitating the movement of the moving plate 11, so that the crushing knife 5 contacts the rock formation for excavation, reducing the wear of the cutting blade 4. When facing the soil layer, the hydraulic telescopic rod 1 9 extends and retracts, driving the crushing knife 5 to descend, and the extension height is lower than that of the cutting blade 4, facilitating excavation, reducing the situation of excessive cutting, reducing wear. Through the adjustment mechanism, it is convenient for the staff to replace the blades according to the excavated soil layer and rock layer, improving the excavation efficiency, facilitating the laying of pipelines, reducing the wear of the blades, increasing the service life, and being convenient to use. During excavation, the hydraulic telescopic rod 2 16 is started. The telescopic movement of the hydraulic telescopic rod 2 16 drives the adjusting plate 14 to move. The movement of the adjusting plate 14 facilitates the adjustment of the size of the second opening 7, so that the adjusting plate 14 slides in the limiting frame 13 to limit the adjusting plate 14. At the same time, the adjusting plate 14 slides on the limiting column 17, facilitating the movement restriction of the adjusting plate 14. When excavating a hard rock formation, the second opening 7 becomes smaller. In the case of large changes in geological conditions, appropriately reducing the opening ratio can reduce the cutting resistance, reduce the equipment load, and prevent the equipment from being damaged due to overload. When excavating the soil layer, the second opening 7 becomes larger, improving the adaptability and flexibility of excavation and facilitating excavation.

[0042] When the cutter head of the pipe jacking machine is in use, the cutter head body 1, the cutting blade 4, the crushing knife 5, and the cutter head 3 are all made of silicon chromium alloy, which is convenient for improving the wear resistance, high temperature resistance, and hardness of the cutter head body 1, the cutting blade 4, the crushing knife 5, and the cutter head 3, and extending the service life. The first opening 6 is triangular, which is convenient for the discharge of soil. The wear-resistant strip 18 is made of ultra-high molecular weight polyethylene, which is convenient for reducing the contact between the cutter head body 1 and the soil. The wear-resistant strip 18 is used for contact with the excavated soil layer, which is convenient for improving the wear resistance of the cutter head body 1 and reducing the wear of the cutter head body 1. The cutting block 19 and the cutting blade 4 are both trapezoidal, which is convenient for improving the cutting efficiency of the cutting blade 4 and the cutting block 19, reducing the vibration during the cutting process, and reducing wear.

Claims

1. A cutter head for a pipe jacking machine, comprising a cutter head body (1), characterized in that: A fixing block (2) is installed in the cutter disc body (1), the fixing block (2) extends out of the cutter disc body (1) and is fixedly connected to a cutter head (3), the cutter head (3) is cross-shaped, cutting blades (4) are installed on the cutter disc body (1) and are arranged in an array, crushing knives (5) are installed on the cutter disc body (1) and are arranged in an array, the crushing knives (5) are located on one side of the cutting blades (4), a plurality of first openings (6) arranged in an array are provided on the cutter disc body (1), a plurality of second openings (7) arranged in an array are provided on the cutter disc body (1), a plurality of support plates (8) are fixed in the cutter disc body (1), and an adjustment mechanism is provided between the support plates (8) and the cutter disc body (1).

2. A pipe jacking machine cutter head according to claim 1, characterized in that: The adjustment mechanism comprises a hydraulic telescopic rod (9) fixed on a support plate (8); a plurality of movable plates (11) are provided at the telescopic end of the hydraulic telescopic rod (9); the movable plates (11) are rotatably connected to the crushing blade (5); the crushing blade (5) is slidably arranged with the cutter head body (1); and a limiting component is provided between the movable plate (11) and the support plate (8).

3. A pipe jacking machine cutter head according to claim 2, characterized in that: The limiting assembly comprises a limiting rod (12) fixed on the support plate (8), the limiting rod (12) being located on one side of a hydraulic telescopic rod (9), the telescopic end of the hydraulic telescopic rod (9) being fixedly connected to a fixed plate (10), the fixed plate (10) being fixedly connected to a movable plate (11), and the limiting rod (12) slidingly passes through the fixed plate (10).

4. The cutter head of the pipe jacking machine according to claim 1, characterized in that: Two symmetrical limiting frames (13) are fixed inside the cutter disc body (1), the limiting frames (13) are L-shaped, the limiting frames (13) correspond to the second opening (7), an adjustment plate (14) is slidably arranged between the limiting frames (13) and the cutter disc body (1), both sides of the adjustment plate (14) are located inside the limiting frames (13), a hydraulic telescopic rod (16) is fixed to one end of the adjustment plate (14), the telescopic end of the hydraulic telescopic rod (16) corresponds to the adjustment plate (14), and a support assembly is arranged between the limiting frames (13) and the cutter disc body (1).

5. The cutter head of the pipe jacking machine according to claim 4, characterized in that: The support assembly comprises a support block (15) fixed in the cutter disc body (1), the support block (15) being fixedly connected to a second hydraulic telescopic rod (16), a limiting column (17) being fixed on a side of the support block (15) away from the hydraulic telescopic rod, the limiting column (17) extending into the adjustment plate (14) and being slidably arranged.

6. The cutter head of a pipe jacking machine according to claim 1, characterized in that: The cutter disc, the cutting blade (4), the crushing blade (5), and the cutter head (3) are all made of silicon-chromium alloy, and the first opening (6) is triangular.

7. The cutter head of a pipe jacking machine according to claim 1, characterized in that: Wear-resistant strips (18) are fixed to the cutter disc body (1) and are distributed in an array, and the wear-resistant strips (18) are made of ultra-high molecular weight polyethylene.

8. The cutter head of a pipe jacking machine according to claim 1, characterized in that: A plurality of cutting blocks (19) are fixed to the upper end of the cutter disc body (1), the cutting blocks (19) being located on one side of the crushing knife (5), and the cutting blocks (19) and the cutting blades (4) are both trapezoidal.

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