A TBM cutter head structure
By introducing an anti-clogging mechanism into the TBM cutterhead structure, the anti-clogging plate is rotated by a motor to clear the stone blockage, thus solving the problem of rock blockage, improving slag discharge efficiency and saving energy. Tungsten steel is used to improve wear resistance.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHINA COAL NO 3 CONSTR (GRP) CORP LTD
- Filing Date
- 2025-10-11
- Publication Date
- 2026-07-31
AI Technical Summary
In the existing TBM cutterhead structure, rocks are easily stuck between the guard plates, affecting the normal discharge efficiency of the slag discharge opening, and crushing rocks requires a large amount of energy, resulting in energy waste.
An anti-blocking mechanism was designed, including a motor-driven rotating shaft and an anti-blocking plate. The anti-blocking plate extends to the inside of the slag discharge opening to block large stones. The motor drives the rotating shaft to rotate, causing the anti-blocking plate to rotate in the rotating groove, clearing the stones stuck between the anti-blocking plates and preventing the stones from being crushed.
It achieves unblocking without crushing stones, improving material discharge efficiency, saving energy, and the anti-blocking plate is made of tungsten steel to improve wear resistance.
Smart Images
Figure CN224579340U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a TBM cutter head structure and belongs to the technical field of TBM cutter head structure. Background Technology
[0002] BM stands for Tunnel Boring Machine. It is divided into open-face tunnel boring machines and shield tunneling machines. In the existing TBM cutterhead structure, there is usually a guard plate at the muck discharge opening to block large rocks generated during excavation from outside the muck discharge opening. This allows the large rocks to be crushed into smaller rocks during the operation of the cutterhead and enter the muck discharge opening through the gaps in the guard plate, thus preventing large rocks from getting stuck in the muck discharge opening.
[0003] However, during TBM operation, rocks sometimes get stuck between the guard plates, which affects the normal discharge of slag from the slag discharge opening and thus affects the waste discharge efficiency.
[0004] Application CN201820787343.0 discloses a cutterhead structure for a TBM (Tunnel Boring Machine). A drive mechanism rotates the compression rollers, guiding the stone as it passes through the guard plates. The rotation of the compression rollers also crushes stones with gaps similar to those between adjacent guard plates, making them easier to pass through. This prevents crushed stone from getting stuck between the guard plates, thus ensuring the normal operation of the bucket.
[0005] However, in actual use, the stone material that can enter between the guard plates is already sufficient to meet the size requirements of the slag discharge opening. The device still needs to crush the stone material, which requires a large force and will result in a waste of energy.
[0006] Therefore, this utility model proposes a new solution. Utility Model Content
[0007] The main purpose of this utility model is to provide a TBM cutter head structure to overcome the shortcomings of the existing technology.
[0008] The objective of this utility model can be achieved by adopting the following technical solution:
[0009] A TBM cutterhead structure includes a cutterhead body with several slag discharge openings on its edge. A scraper is provided on one side of each slag discharge opening, and an anti-clogging mechanism is provided on the other side of the cutterhead body. The anti-clogging mechanism includes a motor, the output end of which is connected to a rotating shaft. Several anti-clogging plates are arranged parallel to each other on the outer wall of the rotating shaft, and a rotating groove that cooperates with the anti-clogging plates is opened on the side wall of each slag discharge opening.
[0010] Preferably, the height of the top of the anti-clogging plate is not higher than the height of the highest point of the scraper.
[0011] Preferably, the side wall of the slag discharge opening is provided with a rotating hole that is rotatably connected to the rotating shaft.
[0012] Preferably, the anti-blocking plate has a plurality of circumferentially spaced grooves, and the edges of the anti-blocking plate have rounded corners.
[0013] Preferably, the drainage channels between two adjacent anti-blocking plates are staggered.
[0014] Preferably, the inner wall of the slag discharge opening near the anti-blocking mechanism has a protrusion.
[0015] Preferably, both the protrusion and the anti-blocking plate are made of tungsten steel.
[0016] Preferably, the front side of the cutter head body is provided with a plurality of water spray holes.
[0017] Preferably, a center hob, a front hob, and a side hob are rotatably mounted on the cutter head body.
[0018] Preferably, the center cutter, the forward cutter, and the side cutter are all tungsten carbide cutters, and each of the center cutter, the forward cutter, and the side cutter includes a center roller and two cutting blades arranged parallel to each other on the outer wall of the center roller.
[0019] The beneficial technical effects of this utility model are as follows: According to the TBM cutter head structure of this utility model, the anti-blocking mechanism extends the anti-blocking plate to the inside of the slag discharge opening, thus preventing stones larger than the slag discharge opening from entering. When smaller stones are stuck between the anti-blocking plates, the motor drives the rotating shaft to rotate, thereby causing the anti-blocking plates to rotate in the rotating groove. The stones stuck between the anti-blocking plates will be blocked by the outer wall of the rotating groove and fall off. The blockage can be cleared without crushing the stones, which is more energy-efficient and faster than crushing the stones. Attached Figure Description
[0020] Figure 1 This is a schematic diagram of the overall structure according to a preferred embodiment of the present invention;
[0021] Figure 2 This is a schematic diagram of the overall structure according to a preferred embodiment of the present invention;
[0022] Figure 3 According to a preferred embodiment provided by this utility model Figure 2 Enlarged schematic diagram of the structure at point A;
[0023] Figure 4 This is a schematic diagram of an anti-blocking plate structure according to a preferred embodiment of the present invention;
[0024] Figure 5This is a schematic diagram of a cutter structure according to a preferred embodiment of the present invention.
[0025] In the diagram: 1. Cutter head body; 2. Slag discharge opening; 3. Scraper; 4. Motor; 5. Rotating shaft; 6. Anti-clogging plate; 7. Rotating groove; 8. Rotating hole; 9. Leakage groove; 10. Protrusion; 11. Center roller cutter; 12. Front roller cutter; 13. Side roller cutter; 14. Water spray hole; 15. Center roller; 16. Cutter. Detailed Implementation
[0026] To enable those skilled in the art to understand the technical solution of this utility model more clearly, the present utility model will be further described in detail below with reference to the embodiments and accompanying drawings, but the implementation of this utility model is not limited thereto.
[0027] like Figures 1-5 As shown in the figure, the TBM cutterhead structure provided in this embodiment includes a cutterhead body 1. The cutterhead body 1 has several slag discharge openings 2 along its edge. A scraper 3 is provided on one side of each slag discharge opening 2, and an anti-clogging mechanism is provided on the other side of the cutterhead body 1. The anti-clogging mechanism includes a motor 4, the output end of which is connected to a rotating shaft 5. Several anti-clogging plates 6 are arranged parallel to each other on the outer wall of the rotating shaft 5. A rotating groove 7 that cooperates with the anti-clogging plates 6 is opened on the side wall of the slag discharge opening 2. Through the anti-clogging mechanism, the anti-clogging plates 6 extend to the inside of the slag discharge opening 2, thus preventing stones larger than the slag discharge opening 2 from entering. When smaller stones are stuck between the anti-clogging plates 6, the motor 4 drives the rotating shaft 5 to rotate, thereby causing the anti-clogging plates 6 to rotate in the rotating groove 7. The stones stuck between the anti-clogging plates 6 are blocked by the outer wall of the rotating groove 7 and fall out. This clears the blockage without crushing the stones, making it more energy-efficient and faster than crushing stones.
[0028] In this embodiment, as Figure 1 , Figure 2 and Figure 3 As shown, the top of the anti-blocking plate 6 is no higher than the highest point of the scraper 3, and a rotating hole 8 is provided on the side wall of the slag discharge opening 2 to be rotatably connected to the rotating shaft 5. The top of the anti-blocking plate 6 is no higher than the highest point of the scraper 3, which can prevent large pieces of stone from entering the slag discharge opening 2.
[0029] In this embodiment, as Figure 1 , Figure 3 and Figure 4 As shown, the anti-blocking plate 6 has several circumferentially spaced grooves 9. The edges of the anti-blocking plate 6 are rounded, and the grooves 9 between adjacent anti-blocking plates 6 are staggered. The staggered arrangement of the grooves 9 between adjacent anti-blocking plates 6 prevents stones from getting stuck between them. Even if stones do get stuck, the grooves 9 allow them to be discharged more easily during rotation.
[0030] In this embodiment, as Figure 1 , Figure 2 and Figure 3 As shown, a protrusion 10 is provided on the inner wall of the slag discharge opening 2 near the anti-clogging mechanism. Both the protrusion 10 and the anti-clogging plate 6 are made of tungsten carbide. The use of tungsten carbide for both the protrusion 10 and the anti-clogging plate 6 improves wear resistance.
[0031] In this embodiment, as Figure 1 , Figure 2 and Figure 5 As shown, the front of the cutter head body 1 has several water spray holes 14. A center cutter 11, a forward cutter 12, and an edge cutter 13 are rotatably mounted on the cutter head body 1. The center cutter 11, the forward cutter 12, and the edge cutter 13 are all made of tungsten steel. Each of the center cutter 11, the forward cutter 12, and the edge cutter 13 includes a center roller 15 and two cutting blades 16 arranged parallel to each other on the outer wall of the center roller 15. The cutting efficiency is improved by setting up double cutting blades 16.
[0032] In this embodiment, as Figures 1-5 As shown, the working process of a TBM cutter head structure provided in this embodiment is as follows:
[0033] During operation, the mud and stones scraped off by the cutter head body 1 enter the slag discharge opening 2; the anti-blocking plate 6 extends to the inside of the slag discharge opening 2, thus preventing stones larger than the slag discharge opening 2 from entering; when smaller stones get stuck between the anti-blocking plates 6, the motor 4 drives the rotating shaft 5 to rotate, thereby causing the anti-blocking plate 6 to rotate in the rotating groove 7, and the stones stuck between the anti-blocking plates 6 will be blocked by the outer wall of the rotating groove 7 and fall off.
[0034] Contents not described in detail in this specification are existing technologies known to those skilled in the art. Standard parts used in this invention can all be purchased commercially, and irregularly shaped parts can be custom-made according to the description and drawings. The specific connection methods for each part all employ conventional methods such as bolts, rivets, and welding, which are already mature technologies. The machinery, parts, and equipment all use conventional models from the prior art, and the circuit connections also employ conventional connection methods from the prior art, which will not be detailed here.
[0035] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.
Claims
1. A TBM cutterhead structure comprising a cutterhead body (1), the edge of the cutterhead body (1) is provided with a plurality of deslagging openings (2), one side of the deslagging opening (2) is provided with a scraper (3), characterized in that, The cutter body (1) is provided with an anti-blocking mechanism on the other side. The anti-blocking mechanism includes a motor (4). The output end of the motor (4) is connected to a rotating shaft (5). Several anti-blocking plates (6) are provided parallel to each other on the outer wall of the rotating shaft (5). A rotating groove (7) that cooperates with the anti-blocking plate (6) is opened on the side wall of the slag discharge opening (2).
2. The TBM cutterhead structure of claim 1, wherein, The height of the top of the anti-blocking plate (6) is not higher than the height of the highest point of the scraper (3).
3. The TBM cutterhead structure of claim 1, wherein, The side wall of the slag discharge opening (2) is provided with a rotating hole (8) that is rotatably connected to the rotating shaft (5).
4. The TBM cutterhead structure of claim 1, wherein, The anti-blocking plate (6) has several circumferentially spaced grooves (9) and the edges of the anti-blocking plate (6) are rounded.
5. The TBM cutterhead structure of claim 4, wherein, The drainage channels (9) between two adjacent anti-blocking plates (6) are staggered.
6. The TBM cutterhead structure of claim 1, wherein, The slag discharge opening (2) has a protrusion (10) on the inner wall near the anti-blocking mechanism.
7. The TBM cutterhead structure of claim 6, wherein, Both the protrusion (10) and the anti-blocking plate (6) are made of tungsten steel.
8. The TBM cutterhead structure of claim 1, wherein, The front of the cutter head body (1) is provided with several water spray holes (14).
9. The TBM cutterhead structure of claim 1, wherein, The cutter head body (1) is rotatably mounted with a center hob (11), a front hob (12) and a side hob (13).
10. A TBM cutter head structure according to claim 9, characterized in that, The center cutter (11), the forward cutter (12) and the side cutter (13) are all tungsten steel cutters, and the center cutter (11), the forward cutter (12) and the side cutter (13) each include a center roller (15) and two cutters (16) arranged parallel to each other on the outer wall of the center roller (15).