Cutting Disc Applicable to Raise Boring Machine Construction

Abstract

The present invention relates to a cutter head applicable to raise boring machine construction, which comprises a central block and a plurality of side blocks. Hob cutters are provided on the top surfaces of the central block and the side blocks. The plurality of side blocks are evenly arranged around the outer periphery of the central block along the circumferential direction of the central block, and the side blocks are hinged to the central block. The side blocks can swing towards the direction close to the center of the central block so as to reduce the diameter of the cutter head applicable to raise boring machine construction. The present invention can effectively solve the problem that the cutter head of the raise boring machine cannot be lowered after support.

Description

Technical Field

[0001] The present invention relates to the technical field of cutter heads, and particularly to a cutter head suitable for the construction of raiseboring machines. Background Art

[0002] Most of the existing cutter heads for the construction of raiseboring machines adopt an integral structure or a split structure connected by bolts. During the construction of the raiseboring machine, after the support, the diameter of the cutter head is larger than the diameter of the shaft wall after support. When the cutter needs to be replaced, the cutter head cannot be lowered.

[0003] Therefore, based on years of experience and practice in the relevant industry, the inventor of the present invention proposes a cutter head suitable for the construction of raiseboring machines to overcome the defects of the existing technology. Summary of the Invention

[0004] The purpose of the present invention is to provide a cutter head suitable for the construction of raiseboring machines, which can effectively solve the problem that the cutter head of the raiseboring machine cannot be lowered after support.

[0005] The purpose of the present invention is achieved as follows. A cutter head suitable for the construction of raiseboring machines includes a central block and a plurality of side blocks. Hob cutters are provided on the top surfaces of the central block and the side blocks. The plurality of side blocks are evenly arranged around the outer periphery of the central block in the circumferential direction, and the side blocks are hinged to the central block. The side blocks can swing towards the direction close to the center of the central block to reduce the diameter of the cutter head suitable for the construction of raiseboring machines.

[0006] In a preferred embodiment of the present invention, the central block includes a central block body and an extension plate provided on the outer periphery of the bottom of the central block body. The hob cutter is provided on the central block body, the side block is provided on the extension plate, and the inner side of the bottom of the side block is hinged to the extension plate.

[0007] In a preferred embodiment of the present invention, a plurality of first through holes penetrating the top surface and the bottom surface of the central block body are provided on the central block body.

[0008] In a preferred embodiment of the present invention, a groove is provided on the side surface of the central block body at a position corresponding to each side block, and a part of the side block can be accommodated in the groove when the side block swings.

[0009] In a preferred embodiment of the present invention, a plurality of second through holes penetrating the central block body up and down are provided on the central block body in the area corresponding to the groove.

[0010] In a preferred embodiment of the present invention, the side block includes a top plate and a plurality of rib plates provided below the top plate. The plate surface of the top plate is parallel to the plate surface of the extension plate, and the hob cutter is provided on the top plate. The plurality of rib plates are arranged in parallel at intervals, the plate surface of the rib plates is perpendicular to the plate surface of the top plate, and the plurality of rib plates are hinged to a support provided on the extension plate through a pin shaft.

[0011] In a preferred embodiment of the present invention, the plate surface shape of the rib plate is a right trapezoid. The upper base and the lower base of the right trapezoid are respectively arranged close to the extension plate and the top plate, and the right-angle side of the right trapezoid is arranged close to the central block.

[0012] In a preferred embodiment of the present invention, the cutter head applicable to raise-boring machine construction further includes a driving mechanism. The driving mechanism is connected to the side block and can drive the side block to swing.

[0013] In a preferred embodiment of the present invention, the driving mechanism is a telescopic oil cylinder. One end of the telescopic oil cylinder is hinged to the central block, and the other end is hinged to the side block.

[0014] In a preferred embodiment of the present invention, a telescopic oil cylinder is provided on each side of the side block.

[0015] As described above, in the cutter head of the present invention, through the cooperation of the central block and the side block, when tool changing is required, the side block can swing towards the direction close to the center of the central block to realize the folding of the cutter head, so as to reduce the diameter of the cutter head, make the diameter of the cutter head smaller than the diameter of the shaft wall after support, and the cutter head can be smoothly lowered, effectively solving the problem that the cutter head of the raise-boring machine cannot be lowered after support. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The following drawings are only intended to illustrate and explain the present invention schematically and do not limit the scope of the present invention. Among them:

[0017] Figure 1 : Schematic diagram of the cutter head applicable to raise-boring machine construction provided by the present invention after being connected to the drill pipe.

[0018] Figure 2 : Top view three-dimensional diagram of the cutter head applicable to raise-boring machine construction provided by the present invention.

[0019] Figure 3 : Schematic diagram of the cutter head applicable to raise-boring machine construction provided by the present invention after the side block is retracted.

[0020] Figure 4 : Three-dimensional diagram of the side block provided by the present invention.

[0021] Explanation of the reference numerals in the drawings:

[0022] 1. Central block; 11. Central block body; 111. Groove; 112. First through hole; 113. Second through hole; 12. Extension plate;

[0023] 2. Side block; 21. Top plate; 22. Rib plate; 23. Pin shaft;

[0024] 3. Telescopic oil cylinder;

[0025] 4. Disc cutter;

[0026] 5. Drill pipe. Detailed implementation manner

[0027] In order to have a clearer understanding of the technical features, objectives, and effects of the present invention, the detailed implementation manner of the present invention will now be described with reference to the accompanying drawings.

[0028] As Figures 1 to 4 shown, this embodiment provides a cutter head applicable to raise boring machine construction, including a central block 1 and a plurality of edge blocks 2. The plurality of edge blocks 2 are evenly arranged around the outer periphery of the central block 1 along the circumferential direction of the central block 1, and the edge blocks 2 are hinged to the central block 1. The edge blocks 2 can swing towards the direction close to the center of the central block 1 to reduce the diameter of the cutter head applicable to raise boring machine construction.

[0029] During use, the cutter head is fixedly connected to the drill pipe 5 and can rotate together with the drill pipe 5. When the raise boring machine is under normal construction, the cutter head expands the hole upwards, and the edge blocks 2 are located at the Figure 1 shown position; when tool changing is required, the edge blocks 2 swing towards the direction close to the center of the central block 1, and the edge blocks 2 are retracted to be in the position as shown in Figure 3 shown. The diameter of the entire cutter head is smaller than the diameter of the shaft wall after support, and the cutter head can be lowered to the bottom of the well for tool changing.

[0030] Thus, in the cutter head of this embodiment, through the cooperation of the central block 1 and the edge blocks 2, when tool changing is required, the edge blocks 2 can swing towards the direction close to the center of the central block 1 to realize the folding of the cutter head, so as to reduce the diameter of the cutter head, make the diameter of the cutter head smaller than the diameter of the shaft wall after support, and the cutter head can be smoothly lowered, effectively solving the problem that the cutter head of the raise boring machine cannot be lowered after support.

[0031] In a specific implementation manner, in order to prevent the edge blocks 2 from rotating when the cutter head expands the hole upwards, as shown in Figure 2 shown, the central block 1 includes a central block body 11 and an extension plate 12 provided on the outer periphery of the bottom of the central block body 11. The hob 4 is provided on the central block body 11, the edge blocks 2 are provided on the extension plate 12, and the inner side of the bottom of the edge blocks 2 is hinged to the extension plate 12.

[0032] When the cutter head expands the hole upward, the upper soil body will exert a downward force on the cutter head. The existence of the extension plate 12 can support the side block 2, resist the downward pressure of the soil body on the side block 2, and prevent the side block 2 from swinging outwards. At the same time, due to the downward pressing action of the upper soil body on the side block 2 and the fact that the lower end of the side block 2 is in contact with the extension plate 12, the side block 2 will not swing inwards either. During the hole expansion stage, the side block 2 and the central block 1 are relatively fixed, ensuring the hole expansion effect. The shapes of the central block body 11 and the extension plate 12 can be determined according to actual needs. For example, in this embodiment, the central block body 11 is a rectangular block, and the extension plate 12 includes four rectangular plate bodies surrounding the four sides of the bottom of the rectangular block body. The four side blocks 2 are respectively arranged on the corresponding rectangular plate bodies. Of course, according to the number of side blocks 2, the extension plate 12 can also adopt other shapes, and this embodiment is only for illustrative purposes.

[0033] In practical applications, to ensure the tunneling effect, the spacing between the hob cutters 4 should not be too large. Therefore, the spacing between the side block 2 and the central block body 11 should not be too large. To ensure that the side block 2 can be normally retracted without interfering with the central block body 11 when the cutter head is folded, as Figure 2 shown, a groove 111 is provided on the side surface of the central block body 11 at the position corresponding to each side block 2. A part of the side block 2 can be accommodated in the groove 111 when the side block 2 swings, so as to provide a accommodation space when the side block 2 swings inwards.

[0034] Generally, in order to prevent the muck from falling on the cutter head when the cutter head expands the hole upward, as Figure 2 shown, a plurality of first through holes 112 penetrating the top surface and the bottom surface of the central block body 11 are provided on the central block body 11, and a plurality of second through holes 113 penetrating the central block body 11 up and down are provided on the central block body 11 in the area corresponding to the groove 111. The first through holes 112 and the second through holes 113 can be used to make the muck fall during the excavation process and not fall on the cutter head.

[0035] Furthermore, in order to improve the bearing capacity of the hinged position between the side block 2 and the extension plate 12, as Figure 4 shown, the side block 2 includes a top plate 21 and a plurality of rib plates 22 provided below the top plate 21. The plate surface of the top plate 21 is parallel to the plate surface of the extension plate 12, and the hob cutter 4 is provided on the top plate 21. The plurality of rib plates 22 are arranged in parallel at intervals, the plate surface of the rib plates 22 is perpendicular to the plate surface of the top plate 21, and the plurality of rib plates 22 are hinged to a support provided on the extension plate 12 through a pin shaft 23.

[0036] The specific number of rib plates 22 is determined according to actual needs. For example, in this embodiment, the side block 2 includes four rib plates 22. The direction of the pin shaft 23 is also set in such a way that the side block 2 can move towards the direction close to the central block body 11. For example, according to Figure 1 and Figure 2When the central block 11 shown in the figure is a rectangular block, the axial direction of the pin shaft 23 is parallel to the upper surface of the extension plate 12 and parallel to the corresponding side surface of the central block 11.

[0037] The shape of the rib plate 22 is also determined according to actual needs. In this embodiment, the plate surface shape of the rib plate 22 is preferably a right trapezoid. The upper base (i.e., the shorter base) and the lower base (i.e., the longer base) of the right trapezoid are respectively arranged close to the extension plate 12 and the top plate 21, and the right-angled side of the right trapezoid is arranged close to the central block 11. Adopting a right trapezoid can, on the one hand, make the side block 2 better stressed, and on the other hand, can ensure that the cutter head diameter is reduced when the side block 2 is retracted, and it is not easy to touch the shaft wall.

[0038] Further, when the cutter head expands the hole upward, due to the downward pressure of the soil on the side block 2 and the supporting force of the extension plate 12 on the side block 2, the side block 2 remains stationary relative to the central block 1. In a feasible embodiment, when the cutter head is lowered, there is no need for the oil cylinder to expand and contract for control. The supported shaft wall will push up the side block 2, causing the side block 2 to swing automatically around the pin shaft 23, and the side block 2 is retracted, so that the cutter head can be lowered smoothly.

[0039] In a preferred embodiment, in order to make the side block 2 retract better when the cutter head is lowered and ensure the smooth lowering of the cutter head, the cutter head applicable to the raise boring machine construction further includes a driving mechanism. The driving mechanism is connected to the side block 2 and can drive the side block 2 to swing.

[0040] For example, the driving mechanism is a telescopic oil cylinder 3. One end of the telescopic oil cylinder 3 is hinged to the central block 1 (specifically, hinged to the central block body 11), and the other end is hinged to the side block 2 (specifically, hinged to the top plate 21). When the cutter head expands the hole upward, since the side block 2 remains stationary relative to the central block 1, the telescopic oil cylinder 3 does not need to be stressed. When the cutter head is lowered, first use the piston rod of the telescopic oil cylinder 3 to retract, drive the side block 2 to retract, so that the cutter head diameter is smaller than the diameter of the supported shaft wall, and then the cutter head can be lowered smoothly, and the operation is more reliable. Generally, in order to make the swing of the side block 2 more stable, it can be arranged according to Figure 2 as shown in the figure, one telescopic oil cylinder 3 is provided on each side of the side block 2.

[0041] Of course, the driving mechanism can also adopt other power devices, as long as it is convenient to drive the side block 2 to swing. This embodiment is only for illustrative purposes.

[0042] In summary, the cutter head in this embodiment is a foldable cutter head with a simple structure. When the cutter head needs to be lowered, the cutter head can be automatically folded, and the side block 2 can be retracted. The degree of automation is high, making the cutter head diameter smaller than the diameter of the supported shaft wall, effectively solving the problems that the cutter head of the raise boring machine cannot be lowered and the cutter cannot be replaced after support.

[0043] The above are only illustrative specific embodiments of the present invention and are not intended to limit the scope of the present invention. Any equivalent changes and modifications made by those skilled in the art without departing from the concept and principles of the present invention shall fall within the scope of protection of the present invention.

Claims

1. A cutter head applicable to raise boring machine construction, characterized in that, It includes a central block and a plurality of edge blocks, and hob cutters are provided on the top surfaces of the central block and the edge blocks. The plurality of edge blocks are evenly arranged around the outer periphery of the central block along the circumferential direction of the central block, and the edge blocks are hinged to the central block. The edge blocks can swing towards the direction close to the center of the central block so as to reduce the diameter of the cutter head applicable to raise-boring machine construction. The central block includes a central block body and an extension plate provided on the outer periphery of the bottom of the central block body. The hob cutter is provided on the central block body, the edge blocks are provided on the extension plate, and the inner side of the bottom of the edge block is hinged to the extension plate. A groove is provided on the side surface of the central block body at a position corresponding to each edge block, and a part of the edge block can be accommodated in the groove when the edge block swings; the central block body is a rectangular block body, the extension plate includes four rectangular plate bodies surrounding the four sides of the bottom of the rectangular block body, and the four edge blocks are respectively provided on the corresponding rectangular plate bodies. The edge block includes a top plate and a plurality of rib plates provided below the top plate. The plate surface of the top plate is parallel to the plate surface of the extension plate, and the hob cutter is provided on the top plate; the plurality of rib plates are arranged in parallel at intervals, the plate surface of the rib plate is perpendicular to the plate surface of the top plate, and the plurality of rib plates are hinged to a support provided on the extension plate through a pin shaft. The axial direction of the pin shaft is parallel to the upper surface of the extension plate and parallel to the corresponding side surface of the central block body; the plate surface shape of the rib plate is a right trapezoid, the upper base and the lower base of the right trapezoid are respectively close to the extension plate and the top plate, and the right-angled side of the right trapezoid is close to the central block body.

2. The cutter head applicable to raise-boring machine construction according to claim 1, wherein a plurality of first through holes penetrating the top surface and the bottom surface are provided on the central block body.

3. The cutter head applicable to raise-boring machine construction according to claim 1, wherein a plurality of second through holes penetrating the central block body up and down are provided on the central block body in the area corresponding to the groove.

4. The cutter head applicable to raise-boring machine construction according to claim 1, wherein the cutter head applicable to raise-boring machine construction further includes a driving mechanism, the driving mechanism is connected to the edge block and can drive the edge block to swing.

5. The cutter head applicable to raise-boring machine construction according to claim 4, wherein the driving mechanism is a telescopic oil cylinder, one end of the telescopic oil cylinder is hinged to the central block, and the other end is hinged to the edge block.

6. The cutter head applicable to raise-boring machine construction according to claim 5, wherein one telescopic oil cylinder is provided on each side of the edge block.

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