Combined roller cutter and drill bit capable of ring-shaped rock breaking

Abstract

The present invention provides a combination roller cutter and drill bit capable of ring-shaped rock breaking, wherein the combination roller cutter capable of ring-shaped rock breaking comprises a support tube and a plurality of outer ring cutter heads, wherein the plurality of outer ring cutter heads are fixed to the lower end tube edge of the support tube at intervals along the circumference of the support tube, and the outer ring cutter head comprises a first cutter seat, a first roller cutter, a second cutter seat and two second roller cutters, wherein the first cutter seat is detachably mounted on the lower surface of the support plate, and the first roller cutter is rotatably mounted on the first cutter seat. The present invention effectively protects the first cutter seat and the second cutter seat by providing a combination roller cutter, thereby avoiding serious wear of the first cutter seat and the second cutter seat during the rock breaking process, avoiding the roller cutter from falling during the rock breaking process, ensuring the working efficiency of the rock breaking, and ensuring the normal construction period of the project.

Description

Technical Field

[0001] The invention relates to the technical field of rock breaking, and in particular to a combined roller cutter and drill bit capable of annularly breaking rocks. Background Art

[0002] With the progress of science and technology in my country and the improvement of mechanization and intelligence, drilling construction technology has been continuously developed to meet the needs of different construction fields and complex geological conditions. my country's drilling construction technology has been applied to many fields such as oil extraction, coal mine construction, geological survey, pile foundation anchoring, etc., and has achieved significant economic and social benefits.

[0003] At present, in the process of breaking rocks, the existing drill bits have certain defects. During the drilling process of the existing drill bits, the cutter holder used by the drill bits is severely worn. As the cutter holder wears more, the roller may fall off at any time, which not only increases the project construction cost, but also reduces the drilling efficiency, affecting the project construction period. Summary of the invention

[0004] The object of the present invention is to solve the above-mentioned shortcomings and provide a combined roller cutter and drill bit capable of annularly breaking rock.

[0005] To achieve the above-mentioned purpose, according to one aspect of the present invention, there is provided a combination roller cutter capable of annular rock breaking, comprising a support tube and a plurality of outer ring cutter heads, wherein the plurality of outer ring cutter heads are fixed at the lower end tube edge of the support tube at intervals along the circumference of the support tube, the outer ring cutter head comprises a first cutter seat, a first roller cutter, a second cutter seat and two second roller cutters, the first cutter seat is detachably mounted on the lower surface of the support plate, the first roller cutter is rotatably mounted on the first cutter seat, the second cutter seat is detachably mounted on the lower surface of the support plate, the two second roller cutters are rotatably mounted on the second cutter seats respectively, the first cutter seat and the second cutter seat are adjacent to each other, and the first roller cutter is located on the outside between the two second roller cutters.

[0006] Furthermore, a groove is provided in the first tool holder, and the first roller cutter is rotatably installed in the groove.

[0007] Furthermore, the first hob is configured as a frustum-shaped structure, and the rotation axis of the first hob is configured to be inclined relative to a horizontal plane.

[0008] Furthermore, the second tool holder includes a fixing plate and a connecting plate, the second tool holder is detachably mounted on the lower surface of the support plate through the fixing plate, the connecting plate is fixed on the fixing plate, and the two second rollers are rotatably mounted on both sides of the connecting plate, and the two ends of the two second rollers extend beyond the two ends of the fixing plate.

[0009] Furthermore, the second hob is configured as a cylindrical structure, and the second hob is designed to be horizontal.

[0010] Furthermore, the first roller cutter is located at the same horizontal plane as the second roller cutter downward.

[0011] According to another aspect of the present invention, there is also provided a drill bit capable of annular rock breaking, comprising a support plate, a plurality of intermediate cutter heads, a plurality of inner ring cutter heads and one or more combined roller cutters, wherein the support plate is located in the support tube and fixed on the inner wall of the support tube, the plurality of intermediate cutter heads are fixed at intervals on the lower surface of the support plate, and the plurality of inner ring cutter heads are fixed on the lower surface of the support plate.

[0012] Furthermore, the plurality of outer ring cutter heads extend downwardly beyond the plurality of inner ring cutter heads and the plurality of intermediate cutter heads.

[0013] Furthermore, it also includes more than one slurry passing pipe, and the more than one slurry passing pipe is arranged in the support tube and passes through the support plate.

[0014] Furthermore, it also includes a central tube and an absorption tube, wherein the central tube is arranged in the support tube and located above the support plate, and the lower end of the central tube is attached to the upper surface of the support plate, and the absorption tube is also arranged in the support tube and passes through the support plate, and the upper end of the absorption tube is connected to the central tube.

[0015] Compared with the prior art, the present invention has the following beneficial effects: the present invention effectively protects the first cutter seat and the second cutter seat by arranging a combined cutter, thereby avoiding serious wear of the first cutter seat and the second cutter seat during rock breaking, avoiding the cutter seat from falling during rock breaking, ensuring the rock breaking efficiency, and ensuring the normal construction period of the project. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the front cross-sectional structure of an embodiment of the present invention.

[0017] Figure 2 It is a bottom view structural schematic diagram of an embodiment of the present invention.

[0018] Figure 3 for Figure 2 Schematic diagram of the enlarged structure of part A.

[0019] Figure 4 The figure is a schematic structural diagram of a first cutter holder and a first hob according to an embodiment of the present invention.

[0020] Figure 5 The figure is a schematic structural diagram of a second cutter holder and a second hob according to an embodiment of the present invention.

[0021] In the figure: 6, support tube; 9, outer ring cutter head; 2, first cutter seat; 3, first roller cutter; 4, second cutter seat; 5, second roller cutter; 21, groove; 41, fixing plate; 42, connecting plate; 1, support plate; 7, middle cutter head; 8, inner ring cutter head; 61, slurry pipe; 62, center pipe; 63, absorption pipe; 64, wear-resistant plate. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. In the absence of conflict, the embodiments in this application and the features in the embodiments can be combined with each other. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0023] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0024] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or schemes that A and B meet at the same time. In addition, "multiple" refers to more than two. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0025] like Figure 1-5As shown, the combined cutter capable of annular rock breaking of the present invention comprises a support tube 6 and a plurality of outer ring cutter heads 9, the plurality of outer ring cutter heads 9 are fixed at intervals along the circumference of the support tube 6 on the lower end tube edge of the support tube 6, the outer ring cutter head 9 comprises a first cutter seat 2, a first cutter 3, a second cutter seat 4 and two second cutters 5, the first cutter seat 2 is detachably mounted on the lower surface of the support plate 1, the first cutter 3 is rotatably mounted on the first cutter seat 2, the second cutter seat 4 is detachably mounted on the lower surface of the support plate 1, the two second cutters 5 are rotatably mounted on the second cutter seat 4 respectively, the first cutter seat 2 and the second cutter seat 4 are adjacent to each other, and the first cutter 3 is located outside between the two second cutters 5. The specific proximity is specifically designed according to the needs, and it can meet the function of protecting the cutter seat.

[0026] In one embodiment, a groove 21 is provided in the first cutter seat 2, and the first roller cutter 3 is rotatably installed in the groove 21. With such a design, the first roller cutter 3 is installed to ensure the normal use of the first roller cutter 3.

[0027] In one embodiment, the first hob 3 is configured as a frustum-shaped structure, and the rotation axis of the first hob 3 is configured to be inclined relative to the horizontal plane. In this design, by configuring the first hob 3 to be inclined, the upper surface of the first hob 3 of the frustum-shaped structure is ensured to be horizontal, which facilitates the use of the first hob 3, and the first hob 3 of the frustum-shaped structure protects the first cutter seat 2 well.

[0028] In one embodiment, the second blade holder 4 includes a fixing plate 41 and a connecting plate 42, the second blade holder 4 is detachably mounted on the lower surface of the support plate 1 through the fixing plate 41, the connecting plate 42 is fixed on the fixing plate 41, and the two second rollers 5 are rotatably mounted on both sides of the connecting plate 42, and the two ends of the two second rollers 5 are respectively beyond the two ends of the fixing plate 41. This design facilitates the installation of the second rollers 5 and the second blade holder 4, and facilitates the disassembly of the second rollers 5 and the second blade holder 4, and the two second rollers 5 are respectively arranged on both sides of the connecting plate 42, which effectively protects the connecting plate 42 and avoids the wear of the connecting plate 42 during use.

[0029] In one embodiment, the second roller cutter 5 is configured as a cylindrical structure, and the second roller cutter 5 is designed horizontally. This design ensures that the upper surface of the second roller cutter 5 is in a horizontal state, which facilitates the use of the second roller cutter 5.

[0030] In one embodiment, the first cutter 3 is at the same horizontal plane as the second cutter 5. With this design, the first cutter 3 and the second cutter 5 are at the same horizontal plane, so that rock breaking can be performed normally. During the use of the first cutter 3 and the second cutter 5, the first cutter seat 2 and the second cutter seat 4 are far away from the rock, thereby avoiding wear of the first cutter seat 2 and the second cutter seat 4.

[0031] like Figure 1-5 As shown, the drill bit capable of annular rock breaking of the present invention comprises a support plate 1, a plurality of intermediate cutter heads 7, a plurality of inner ring cutter heads 8 and one or more combined roller cutters, wherein the support plate 1 is located in the support tube 6 and fixed on the inner wall of the support tube 6, the plurality of intermediate cutter heads 7 are fixed at intervals on the lower surface of the support plate 1, and the plurality of inner ring cutter heads 8 are fixed on the lower surface of the support plate 1.

[0032] All the cutters of the existing conventional drill bits are located on the same plane, and the shape of the rock surface at the bottom of the drilled hole is horizontal. However, in the design of the present invention, since the outer ring cutter head 9 exceeds the inner ring cutter head 8 downward, a "concave"-shaped rock layer shape at the bottom of the hole will be formed during the drilling process. A groove 21 is first cut out on the outer edge of the drill bit to destroy the overall structure of the rock surfaces inside and outside the drill bit, and the free surface of the stroke is conducive to the rock breaking of the internal cutter, thereby improving the rock breaking efficiency, achieving the purpose of improving drilling efficiency, reducing construction costs, and shortening construction period.

[0033] In one embodiment, the plurality of outer ring cutter heads 9 are downwardly positioned above the plurality of inner ring cutter heads 8 and the plurality of intermediate cutter heads 7. With this design, the outer ring cutter heads 9 first break the rocks, and the inner ring cutter heads 8 and the intermediate cutter heads 7 are effectively protected.

[0034] In one embodiment, more than one slurry pipe 61 is further included, and the more than one slurry pipe 61 is arranged in the support tube 6 and passes through the support plate 1. With this design, the slurry pipe 61 serves as a mud channel, allowing the mud to flow along the designed path. The use of this mud channel design can effectively flush the working surface and improve drilling efficiency.

[0035] In one embodiment, a central tube 62 and an absorption tube 63 are further included, wherein the central tube 62 is arranged in the support tube 6 and is located above the support plate 1, and the lower end of the central tube 62 is attached to the upper surface of the support plate 1, and the absorption tube 63 is also arranged in the support tube 6 and passes through the support plate 1, and the upper end of the absorption tube 63 is communicated with the central tube 62. In this design, the lower end of the absorption tube 63 is a suction port, so that the slurry enters the support tube 6 and then flows back to the outside of the support tube 6 through the slurry pipe 61.

[0036] In one embodiment, more than one strip-shaped wear-resistant plate 64 is further included, and the more than one strip-shaped wear-resistant plate 64 is spirally wound and fixed on the outer wall of the support tube 6. With such a design, the spirally wound wear-resistant plate 64 can not only play the role of the wear-resistant plate 64, but also play the role of a mud pump when the drill bit rotates, accelerating the flushing effect of mud on the bottom of the hole.

[0037] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered exemplary and non-restrictive in all respects, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention.

Claims

1. A combined roller cutter capable of ring-shaped rock breaking, characterized in that: It comprises a support plate (1), a support tube (6), a plurality of intermediate cutter heads (7), a plurality of inner ring cutter heads (8) and a plurality of outer ring cutter heads (9), wherein the plurality of outer ring cutter heads (9) are fixed to the lower end tube edge of the support tube (6) at intervals along the circumference of the support tube (6), and the outer ring cutter head (9) comprises a first cutter seat (2), a first roller cutter (3), a second cutter seat (4) and two second roller cutters (5), wherein the first cutter seat (2) is detachably mounted on the lower surface of the support plate (1), the first roller cutter (3) is rotatably mounted on the first cutter seat (2), the second cutter seat (4) is detachably mounted on the lower surface of the support plate (1), and the two second roller cutters (5) are rotatably mounted on the second cutter seat (4), respectively, the first cutter seat (2) and the second cutter seat (4) are adjacent to each other, and the first roller cutter (3) is located on the outer side between the two second roller cutters (5); The support plate (1) is located in the support tube (6) and fixed on the inner wall of the support tube (6); a plurality of intermediate cutter heads (7) are fixed at intervals on the lower surface of the support plate (1); a plurality of inner ring cutter heads (8) are fixed on the lower surface of the support plate (1); a plurality of outer ring cutter heads (9) are downwardly disposed beyond the plurality of inner ring cutter heads (8) and the plurality of intermediate cutter heads (7); The first roller (3) is arranged as a frustum-shaped structure, and the rotation axis of the first roller (3) is arranged to be inclined relative to the horizontal plane; the first roller (3) is located downwardly in the same horizontal plane as the second roller (5).

2. A combined roller cutter capable of annular rock breaking according to claim 1, characterized in that: A groove (21) is provided in the first cutter seat (2), and the first roller cutter (3) is rotatably mounted in the groove (21).

3. A combined roller cutter capable of annular rock breaking according to claim 1 or 2, characterized in that: The second knife seat (4) comprises a fixing plate (41) and a connecting plate (42); the second knife seat (4) is detachably mounted on the lower surface of the support plate (1) via the fixing plate (41); the connecting plate (42) is fixed on the fixing plate (41); the two second rollers (5) are rotatably mounted on both sides of the connecting plate (42); and the two ends of the two second rollers (5) extend beyond the two ends of the fixing plate (41).

4. A combined roller cutter capable of annular rock breaking according to claim 1 or 2, characterized in that: The second roller (5) is configured as a cylindrical structure, and the second roller (5) is designed horizontally.

5. A combined roller cutter capable of annular rock breaking according to claim 1 or 2, characterized in that: It also comprises one or more pulp passing pipes (61), wherein the one or more pulp passing pipes (61) are arranged in the support tube (6) and pass through the support plate (1).

6. A combined roller cutter capable of annular rock breaking as claimed in claim 1 or 2, characterized in that: It also includes a central tube (62) and an absorption tube (63), wherein the central tube (62) is arranged in the support tube (6) and is located above the support plate (1), and the lower end of the central tube (62) is attached to the upper surface of the support plate (1), and the absorption tube (63) is also arranged in the support tube (6) and passes through the support plate (1), and the upper end of the absorption tube (63) is connected to the central tube (62).

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