Split type hob seat

Abstract

The utility model provides a split type hob seat in the field of heading machines. Comprising an outer tool apron and an inner tool apron, the outer tool apron is used for assembling the hob on a shield tunneling machine cutterhead; the inner cutter holder is embedded on the outer cutter holder and is used for locking and fixing the hobbing cutter; the outer tool apron accommodates the inner tool apron and is assembled together with the inner tool apron through screw joint, and the inner tool apron and the outer tool apron are supported at the two ends of the hob after being assembled and are assembled on a shield tunneling machine cutterhead. According to the embodiment, the technical means that the groove is formed in the side portion of the outer cutter holder and used for embedding the inner cutter holder, the supporting block is arranged on the inner cutter holder to support the cutter shaft to fix the hob is adopted, and the outer cutter holder and the inner cutter holder are connected in a threaded mode to form the whole hob holder; the outer tool apron and the inner tool apron can be machined respectively, and the outer tool apron is made of low-carbon steel or low-alloy steel and is good in welding performance. The inner tool apron is made of alloy structural steel and has high yield strength, tensile strength and fatigue strength. The performance requirement of the hob seat is met, and the cost of the heading machine hob is reduced. The split hob seat is suitable for being used as a split hob seat.

Description

Technical Field

[0001] The utility model relates to a roller cutter seat in the field of large-diameter full-section hard rock tunnel boring equipment TBM, in particular to a split roller cutter seat. Background Art

[0002] Large-diameter, full-section hard rock tunnel boring equipment TBM is a large-scale factory-based assembly line tunnel engineering that integrates mechanical, electronic, hydraulic, laser, electrical and other technologies. It can simultaneously realize multiple processes such as excavation, support, and mucking. Compared with traditional manual drilling and blasting methods, it has the advantages of fast excavation speed, high safety, low labor intensity, good construction quality and environmental protection. It can serve stably and efficiently in a variety of difficult and dangerous construction environments, and complete the construction of tunnel projects with quality and quantity.

[0003] However, the inventors of this application found that the above technology has at least the following technical problems in the process of implementing the technical solution of the invention in the embodiment of this application:

[0004] The disc cutter of the large-diameter full-section hard rock tunnel boring equipment TBM needs to be welded to the shield machine cutterhead through the outside of the cutter seat. The cutter needs to be installed inside the cutter seat, so the cutter seat needs to have good weldability and at the same time ensure internal rigidity. The commonly used cutter seat is an integrated structure. Meeting the above two points will lead to a significant increase in the cost of the cutter seat. In order to ensure the performance of the cutter seat, the cost of the cutter seat remains high. Summary of the invention

[0005] In order to solve the deficiencies in the prior art, the utility model provides a split type hob cutter seat in view of the problem that the integrated hob cutter seat must have both weldability and rigidity. The hob cutter seat is divided into two parts, the outer cutter seat is made of a material suitable for welding, and the inner cutter seat is made of alloy structural steel. The outer cutter seat and the inner cutter seat are detachably screwed together, which can ensure that the inner cutter seat has high hardenability and good toughness and plasticity, and has high yield strength, tensile strength and fatigue strength, thereby solving the technical problems of the integrated hob cutter seat.

[0006] The solution adopted by the utility model to solve the technical problem is:

[0007] A split cutter holder comprises an outer cutter holder and an inner cutter holder; the outer cutter holder is used to assemble the cutter on the cutter head of a shield machine; the inner cutter holder is embedded in the outer cutter holder and is used to lock and fix the cutter; wherein the outer cutter holder accommodates the inner cutter holder and is assembled together by screw connection.

[0008] In order to further solve the technical problem to be solved by the utility model, the outer tool seat provided by the utility model is a rectangular plate structure, a groove is provided on the side of the outer tool seat for embedding the inner tool seat, and wing plates are provided on both sides of the groove for limiting the inner tool seat; a slope is provided between the groove and the wing plate, and internal threads are provided at the top and bottom of the outer tool seat for assembly positioning.

[0009] Furthermore, the outer tool holder is made of Q345 material.

[0010] Furthermore, the inner tool seat is a rectangular block, and a chamfer corresponding to the slope of the outer tool seat is provided on one side of the inner tool seat, so that the inner tool seat can be inserted into the outer tool seat; a through groove is provided on the other side of the inner tool seat, and a raised support block is provided at one end of the through groove, and the C-shaped block is seated on the support block to support the cutter shaft of the hob, and the support block is provided with a bolt through hole for assembly; an extrusion block is provided at the other end of the through groove, and a pressure block is provided at the lower part of the extrusion block, one end of the pressure block is placed on the lower part of the extrusion block, and the other end is placed on the lower part of the support block; a tensioning block is provided on the upper part of the extrusion block, one end of the tensioning block abuts against the upper part of the extrusion block and can slide along it, and the other end is pressed down on the cutter shaft of the hob; the pressure block and the tensioning block are linked by bolts.

[0011] Furthermore, the groove width of the outer tool seat matches the width of the inner tool seat, the thickness of the inner tool seat is greater than the height of the wing plate, and the wing plate of the outer tool seat protrudes after the inner tool seat is accommodated in the outer tool seat, and a gap is retained between the hob and the outer tool seat.

[0012] Furthermore, the inner tool holder is made of 30CrNiMo material.

[0013] Positive effects: The technical solution provided in the embodiments of the present application has at least the following technical effects or advantages:

[0014] Since the embodiment of the present application adopts a technical means in which a groove is provided on the side of the outer cutter seat for embedding the inner cutter seat, and a support block is provided on the inner cutter seat to support the cutter shaft and fix the roller cutter, the outer cutter seat and the inner cutter seat are screwed to form an integral roller cutter seat; therefore, the outer cutter seat and the inner cutter seat can be processed separately, and the outer cutter seat is made of low-carbon steel or low-alloy steel with good welding performance; the inner cutter seat is made of alloy structural steel with high yield strength, tensile strength and fatigue strength; the technical problem that the integrated roller cutter seat in the prior art must have both weldability and rigidity is effectively solved, thereby achieving the technical effect of meeting the performance requirements of the roller cutter seat, reducing the cost of the roller cutter of the tunnel boring machine, and improving the economic benefits of large-diameter full-section hard rock tunnel boring equipment TBM.

[0015] Suitable for use as a split hob seat. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the utility model 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 utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0017] Figure 1 This is the front view of the present embodiment;

[0018] Figure 2 It is a top view of this embodiment;

[0019] Figure 3 It is the AA section view;

[0020] Figure 4 This is a bottom view of the present embodiment.

[0021] In the figure:

[0022] 1. External knife holder,

[0023] 11. Grooves,

[0024] 12. Wing plate,

[0025] 13. Slope part,

[0026] 14. Internal thread;

[0027] 2. Inner knife seat,

[0028] 21. Support block,

[0029] 22. Extrusion block,

[0030] 23. Bolt through hole. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Although the embodiments of the utility model have been shown and described, it can be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the utility model, and the scope of the utility model is defined by the attached claims and their equivalents. Based on the embodiments in the utility model, all other embodiments obtained by those of ordinary skill in the art without making creative work are within the scope of protection of the utility model.

[0032] The embodiment of the present application provides a split cutter seat, which solves the problem in the prior art that the cutter seat needs to have good weldability while ensuring internal rigidity, and the cost is high to ensure the performance of the cutter seat. In the embodiment, the integrated cutter seat is divided into two parts, the outer cutter seat is made of a material suitable for welding, and the inner cutter seat is made of alloy structural steel. The outer cutter seat and the inner cutter seat are detachably screwed together, so that the split cutter seat has high yield strength, tensile strength and fatigue strength, reduces costs and meets the performance of the cutter seat.

[0033] As shown in the figure, a split hob cutter seat includes an outer cutter seat 1 and an inner cutter seat 2;

[0034] The outer cutter holder 1 is used to assemble the roller cutter on the cutter head of the shield machine;

[0035] The inner tool holder 2 is embedded in the outer tool holder 1 and is used to lock and fix the hob;

[0036] Among them, the outer tool holder 1 accommodates the inner tool holder 2 and is assembled together by screw connection. After the inner tool holder 2 is assembled with the outer tool holder 1, it is supported at both ends of the hob and assembled on the cutter head of the shield machine.

[0037] In order to ensure the stability of the structure of this embodiment, the outer tool seat 1 is a rectangular plate structure, and a groove 11 is provided on the side of the outer tool seat 1 for embedding the inner tool seat 2. Wing plates 12 are provided on both sides of the groove 11 for limiting the inner tool seat 2; a slope portion 13 is provided between the groove 11 and the wing plate 12 to enhance the strength of the wing plate 12 in clamping the inner tool seat 2, improve rigidity and reduce deformation; internal threads 14 are provided at the top and bottom of the outer tool seat 1 for assembly positioning.

[0038] As a conventional technical choice, the outer cutter seat 1 is made of low carbon steel or low alloy steel. In this embodiment, Q345 is selected, which is suitable for welding on the cutter head of the shield machine. Low carbon steel and low alloy steel with a carbon content of less than 0.25% have excellent plasticity and impact toughness, and the plasticity and impact toughness of the welded joint after welding are also very good. No preheating and post-weld heat treatment are required during welding, and the welding process is simple and convenient, so it has good weldability.

[0039] In order to further ensure the stability of the structure of this embodiment, the inner tool seat 2 is a rectangular block, and a chamfer corresponding to the slope 13 of the outer tool seat 1 is provided on one side of the inner tool seat 2, so that the inner tool seat 2 can be inserted into the outer tool seat 1; a through groove is provided on the other side of the inner tool seat 2, and a raised support block 21 is provided at one end of the through groove, and the C-shaped block is seated on the support block 21 to support the cutter shaft of the hob, and the support block 21 is provided with a bolt through hole 23 for assembly; an extrusion block 22 is provided at the other end of the through groove, and a pressure block is provided at the lower part of the extrusion block 22, one end of the pressure block is placed on the lower part of the extrusion block 22, and the other end is placed on the lower part of the support block 21; a tensioning block is provided at the upper part of the extrusion block 22, one end of the tensioning block abuts against the upper part of the extrusion block 22 and can slide along it, and the other end is pressed down on the cutter shaft of the hob; the pressure block and the tensioning block are linked by bolts.

[0040] In this embodiment, the inner tool holder 2 adopts the method of assembling the hob in the prior art. The C-shaped block supports the cutter shaft of the hob, the pressure block serves as a support point, and the tensioning block is pressed down on the cutter shaft of the hob by screwing to form an assembly method of a ring-hoop cutter shaft, wherein the structure of the C-shaped block, the pressure block and the tensioning block are not repeated.

[0041] In order to optimize the structure of this embodiment, the width of the groove 11 of the outer tool seat 1 matches the width of the inner tool seat 2, the thickness of the inner tool seat 2 is greater than the height of the wing plate 12, and the wing plate 12 of the outer tool seat 1 protrudes after the inner tool seat 2 is accommodated in the outer tool seat 1, leaving a gap between the hob and the outer tool seat 1.

[0042] In order to further optimize the structure of this embodiment, the inner tool holder 2 is made of alloy structural steel. In this embodiment, 30CrNiMo is selected, which has higher yield strength, tensile strength and fatigue strength.

[0043] The technical solutions in the above embodiments of the present application have at least the following technical effects or advantages:

[0044] A split cutter seat adopts an outer cutter seat 1 and an inner cutter seat 2 which are screwed to form an integral cutter seat, a groove 11 is provided on the side of the outer cutter seat 1 for embedding the inner cutter seat 2, and the inner cutter seat 2 is provided with a support block 21 to support the cutter shaft and fix the cutter, so the outer cutter seat 1 and the inner cutter seat 2 can be processed separately, the outer cutter seat 1 is made of low carbon steel or low alloy steel and has good welding performance; the inner cutter seat 2 is made of alloy structural steel and has high yield strength, tensile strength and fatigue strength; the performance requirements of the cutter seat are met, the cost of the tunnel boring machine cutter is reduced, and the economic benefits of large-diameter full-section hard rock tunnel boring equipment TBM are improved.

[0045] It is worth noting that the contents not described in detail in the specification belong to the existing technology known to those skilled in the art, and the model parameters of the tunnel boring machine and the roller cutter are not specifically limited. In this technical solution, the C-shaped blocks, pressure blocks and tensioning blocks mentioned are the existing technology and are not shown in the figures and will not be described here.

[0046] Finally, it should be noted that the above is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. A split hob seat, characterized by: include: An outer cutter seat (1), the outer cutter seat (1) being used for assembling the roller cutter on the cutter head of a shield machine; and An inner cutter seat (2), the inner cutter seat (2) being embedded in the outer cutter seat (1) and used for locking and fixing the hob; Wherein, the outer tool holder (1) accommodates the inner tool holder (2) and is assembled together by screw connection; The outer tool seat (1) is a rectangular plate-shaped structure, a groove (11) is provided on the side of the outer tool seat (1) for embedding the inner tool seat (2), wing plates (12) are provided on both sides of the groove (11) for limiting the position of the inner tool seat (2); a slope (13) is provided between the groove (11) and the wing plates (12), and internal threads (14) are provided on the top and bottom of the outer tool seat (1) for assembly positioning.

2. The split hob seat according to claim 1 is characterized in that: The outer tool holder (1) is made of Q345 material.

3. The split hob seat according to claim 1 is characterized in that: The inner tool seat (2) is a rectangular block, and a chamfer corresponding to the slope (13) of the outer tool seat (1) is provided on one side of the inner tool seat (2), so that the inner tool seat (2) can be inserted into the outer tool seat (1); a through slot is provided on the other side of the inner tool seat (2), and a protruding support block (21) is provided at one end of the through slot, and a C-shaped block is seated on the support block (21) to support the cutter shaft of the hob, and a bolt through hole (21) for assembly is provided on the support block (21). 23); an extrusion block (22) is provided at the other end of the through groove, a pressure block is provided at the lower part of the extrusion block (22), one end of the pressure block is placed on the lower part of the extrusion block (22), and the other end is placed on the lower part of the support block (21); a tension block is provided at the upper part of the extrusion block (22), one end of the tension block is pressed against the upper part of the extrusion block (22) and can slide along it, and the other end is pressed down on the cutter shaft of the hob; the pressure block and the tension block are linked by bolts.

4. The split hob seat according to claim 1 is characterized in that: The width of the groove (11) of the outer tool seat (1) matches the width of the inner tool seat (2), the thickness of the inner tool seat (2) is greater than the height of the wing plate (12), and the inner tool seat (2) protrudes from the wing plate (12) of the outer tool seat (1) after being received in the outer tool seat (1), so that a gap is retained between the hob and the outer tool seat (1).

5. The split hob seat according to claim 1 is characterized in that: The inner tool holder (2) is made of 30CrNiMo material.

Images