Cone reamer

Abstract

The utility model belongs to the technical field of reamers, and particularly provides a cone reamer which comprises a center shaft, an installation support, a plurality of cone assemblies and a water inlet interlayer, a plurality of connecting parts are formed on the installation support in the circumferential direction of the installation support, the connecting parts extend in the radial direction, and the cone assemblies are arranged on the connecting parts in a one-to-one correspondence mode. The water inlet interlayer is arranged on the advancing side of the cone assembly, the water inlet interlayer is communicated with the water inlet hole of the center shaft, and water spraying holes facing the cone assembly are formed in the water inlet interlayer. By means of the arrangement, on one hand, the water inlet interlayer and the cone assembly do not interfere with each other, the groove bottom of the chip removal groove can directly extend to the position close to the center shaft, and the chip removal efficiency can be improved. And on the other hand, the axial length of the water inlet interlayer can be designed to be longer, so that a larger water inlet amount can be obtained. And on the other hand, by means of the structure, arrangement of the water spraying holes is more convenient, a plurality of water spraying holes can be formed in the side, close to the cone assembly, of the water inlet interlayer, and better cleaning and cooling effects can be achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of hole expanders, and in particular relates to a roller hole expander. Background Art

[0002] The roller hole reamer is suitable for trenchless engineering, pile foundation construction, mining and other fields. It is an instrument used for hole reaming. The general structure of the roller hole reamer includes a central axis, a water inlet interlayer is arranged around the outer periphery of the central axis, the interior of the central axis is hollow, and a water inlet hole connected to the water inlet interlayer is opened on the side wall, which is used to allow water or mud to enter the water inlet interlayer through the central axis. The side wall of the interlayer is provided with a plurality of roller assemblies along its own circumference, and the end face of the water inlet interlayer is provided with a water outlet hole facing the roller assembly. During operation, mud is supplied to the interior of the central axis through the drill rod, and the mud enters the water inlet interlayer through the water inlet hole and is sprayed out from the water outlet hole, which plays the role of flushing the roller, cooling the roller, reducing the friction between the roller and the hole wall, and protecting the borehole.

[0003] When the cone reamer is working, it will break the rock on the inner wall of the hole, thus generating rock chips. Therefore, it is necessary to process the chip groove between two adjacent cone assemblies so that the ejected mud can carry the rock chips and discharge them from the hole through the chip groove. Good chip removal efficiency can avoid repeated breaking of rock chips by the drill bit and reduce the wear of the drill bit. The chip removal efficiency is positively correlated with the size of the chip groove.

[0004] In the prior art, the gear assembly is directly arranged on the water inlet interlayer, and the water inlet interlayer is welded by enclosing an annular side plate and cover plates at both ends. After the side plate and the central axis are welded together, an opening is made on the side wall of the water inlet interlayer, and the tooth palm of the gear assembly is directly welded at the opening position, and the opening is blocked by the tooth palm, and a chip removal groove is formed between the two tooth palms. The disadvantage of this structure is that the size of the chip removal groove cannot be made larger due to the limitation of the water inlet interlayer, so that the chip removal efficiency is limited and the chip removal efficiency is not high. Utility Model Content

[0005] The utility model provides a roller reamer, aiming to solve the problem in the prior art that the size of the chip removal groove of the roller reamer is restricted by the water inlet interlayer and the chip removal efficiency is low.

[0006] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: to provide a roller reamer, comprising:

[0007] The central shaft has a central hole extending through the central shaft along its axial direction, and a water inlet hole communicating with the central hole is provided on a side wall of the central shaft;

[0008] A mounting bracket is arranged on the central axis, wherein the mounting bracket has a plurality of connecting parts formed along its circumference, the connecting parts extend along the radial direction of the central axis, and a chip removal groove is formed between two adjacent connecting parts;

[0009] A plurality of cone assemblies are disposed one by one at an end of the connecting portion away from the central axis; and

[0010] The water inlet interlayer is arranged on the outer periphery of the central axis and located on the forward side of the gear assembly. The water inlet interlayer has a water inlet cavity connected to the water inlet hole. A water spray hole is opened on one side of the water inlet interlayer adjacent to the gear assembly, and the water spray hole is connected to the water inlet cavity.

[0011] In a possible implementation, the central axis is provided with a plurality of water inlet holes along its circumference.

[0012] In a possible implementation, the central axis is provided with a plurality of water inlet holes along its axial direction.

[0013] In a possible implementation, the mounting bracket further includes a fixing portion, which is annular and connected to the central axis, and a plurality of connecting portions are arranged at intervals along the circumference of the fixing portion.

[0014] In a possible implementation, a mounting groove is formed at one end of the connection portion away from the central axis, and the tooth base of the gear assembly is disposed in the mounting groove.

[0015] In a possible implementation, a plurality of water spray holes are formed on one side of the water inlet interlayer adjacent to the cone assembly along its circumference, and each cone assembly corresponds to one or more water spray holes.

[0016] In a possible implementation, the water spray hole is connected to a water spray pipe, and the water outlet direction of the water spray pipe is toward the corresponding cone assembly.

[0017] In a possible implementation, the water inlet interlayer includes:

[0018] A first cover plate, arranged on the central axis and located between the forward side of the cone assembly and the water inlet hole, the first cover plate being provided with the water spray hole;

[0019] a side plate, which is annular and is disposed on a side of the first cover plate away from the cone assembly; and

[0020] The second cover plate is connected to the central axis and is arranged on a side of the side plate away from the first cover plate. The second cover plate, the side plate and the first cover plate are jointly enclosed to form the water inlet cavity.

[0021] In a possible implementation, the roller reamer further includes a straightening mechanism, and the straightening mechanism includes a plurality of straightening plates disposed on the forward side of the roller assembly, and the plurality of straightening plates are spaced apart along the circumference of the central axis.

[0022] In a possible implementation, a side of the straightening plate adjacent to the central axis is provided with an avoidance groove, the water inlet interlayer is accommodated in the avoidance groove, and the side plate is connected to a plurality of the straightening plates.

[0023] Compared with the prior art, the beneficial effects of the roller reamer provided by the utility model are:

[0024] The roller reamer provided by the utility model includes a central axis, a mounting bracket, a plurality of roller assemblies and a water inlet interlayer. The mounting bracket is provided with a plurality of connecting parts along its circumference, the connecting parts extend radially, and the roller assemblies are arranged on the connecting parts one by one, and the water inlet interlayer is arranged on the forward side of the roller assembly, the water inlet interlayer is connected with the water inlet hole of the central axis, and a water spray hole facing the roller assembly is provided on the water inlet interlayer. The utility model arranges the water inlet interlayer on the forward side of the roller assembly, and the roller assembly is fixed on the central axis through the mounting bracket. With such arrangement, on the one hand, the water inlet interlayer and the roller assembly do not interfere with each other, and the bottom of the chip removal groove can be directly extended to the vicinity of the central axis, thereby obtaining a larger chip removal groove, which helps to improve the chip removal efficiency. On the other hand, the axial length of the water inlet interlayer can also be designed to be longer, so as to facilitate the arrangement of multiple water inlet holes between the water inlet interlayer and the central axis, thereby obtaining a larger water intake. On the other hand, this structure makes it easier to arrange the water spray holes. A plurality of water spray holes can be arranged on one side of the water inlet interlayer adjacent to the gear assembly, which helps to achieve a better cleaning and cooling effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A schematic diagram of the structure of a roller reamer provided in one embodiment of the utility model Figure 1 ;

[0026] Figure 2 for Figure 1 A partial enlarged view of the middle A part;

[0027] Figure 3 A schematic diagram of the structure of a roller reamer provided in one embodiment of the utility model Figure 2 ;

[0028] Figure 4 A partial cross-sectional view of a roller reamer provided in one embodiment of the utility model;

[0029] Figure 5 An internal cross-sectional view of a roller reamer provided in one embodiment of the utility model.

[0030] Description of reference numerals:

[0031] 1. Cone reamer; 10. Center axis; 11. Center hole; 12. Water inlet hole; 20. Mounting bracket; 21. Fixing part; 22. Connecting part; 23. Chip groove; 30. Cone assembly; 31. Cone palm; 32. Cone; 40. Water inlet interlayer; 41. First cover plate; 411. Water spray pipe; 42. Side plate 43. Second cover plate; 50. Righting mechanism; 51. Righting plate; DETAILED DESCRIPTION

[0032] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0033] It should be noted that when an element is referred to as being "fixed to", "fixed" or "fixedly disposed" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" or "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. When an element is referred to as being "set to" or "disposed on" another element, it may be directly on the other element or there may be a central element. "Multiple" refers to two or more quantities. "At least one" refers to one or more quantities. "Several" refers to one or more quantities.

[0034] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

[0035] Please also read Figures 1 to 5 , the roller reamer 1 provided in the embodiment of the utility model is described below.

[0036] See also Figure 1 , Figure 2 and Figure 4The utility model provides a roller reamer 1, comprising a central axis 10, a mounting bracket 20, a plurality of roller assemblies 30 and a water inlet interlayer 40, wherein the central axis 10 has a central hole 11 extending axially therethrough, and a side wall of the central axis 10 is provided with a water inlet hole 12 connected to the central hole 11; the mounting bracket 20 is arranged on the central axis 10, and the mounting bracket 20 is formed with a plurality of connecting parts 22 along its circumference, and the connecting parts 22 extend radially along the central axis 10, and a chip removal groove 23 is formed between two adjacent connecting parts 22; the plurality of roller assemblies 30 are arranged one by one at one end of the connecting part 22 away from the central axis 10; the water inlet interlayer 40 is arranged on the outer periphery of the central axis 10 and is located on the forward side of the roller assembly 30, the water inlet interlayer 40 has a water inlet cavity connected to the water inlet hole 12, and a water spray hole is provided on a side of the water inlet interlayer 40 adjacent to the roller assembly 30, and the water spray hole is connected to the water inlet cavity.

[0037] Compared with the prior art, the beneficial effects of the roller reamer 1 provided in the embodiment of the utility model are:

[0038] The roller reamer 1 provided in the embodiment of the utility model comprises a central shaft 10, a mounting bracket 20, a plurality of roller assemblies 30 and a water inlet interlayer 40. The mounting bracket 20 is provided with a plurality of connecting parts 22 along its circumference, the connecting parts 22 extend radially, and the roller assemblies 30 are arranged one by one on the connecting parts 22, and the water inlet interlayer 40 is arranged on the forward side of the roller assemblies 30, the water inlet interlayer 40 is connected with the water inlet hole 12 of the central shaft 10, and a water spray hole facing the roller assemblies 30 is opened on the water inlet interlayer 40. The utility model arranges the water inlet interlayer 40 on the forward side of the roller assemblies 30, and the roller assemblies 30 are fixed on the central shaft 10 through the mounting bracket 20. With such an arrangement, on the one hand, the water inlet interlayer 40 and the roller assemblies 30 do not interfere with each other, and the bottom of the chip removal groove 23 can directly extend to the vicinity of the central shaft 10, thereby obtaining a larger chip removal groove 23, which helps to improve the chip removal efficiency. On the other hand, the axial length of the water inlet interlayer 40 can also be designed to be longer, so that a plurality of water inlet holes 12 can be arranged between the water inlet interlayer 40 and the central axis 10, thereby obtaining a larger water inlet amount. On the other hand, this structure makes it more convenient to arrange the water spray holes, and a plurality of water spray holes can be arranged on one side of the water inlet interlayer 40 adjacent to the cone assembly 30, which helps to achieve a better cleaning and cooling effect.

[0039] The central shaft 10 in the embodiment of the utility model has a through central hole 11, and the side wall of the central shaft 10 is provided with a water inlet hole 12 connected to the central hole 11. The central shaft 10 is connected to the drill rod when in use, and the two ends of the central shaft 10 are respectively formed with a male joint and a female joint adapted to the drill rod thread. The water inlet interlayer 40 is arranged on the forward side of the cone assembly 30 and corresponds to the water inlet hole 12. It should be noted that the forward side of the cone assembly 30 is the direction in which the cone reamer 1 moves forward when working.

[0040] The mounting bracket 20 is disposed on the central axis 10 and can be fixed by welding or by fasteners such as bolts. The mounting bracket 20 is used to provide support and mounting position for the gear assembly 30. A plurality of connecting portions 22 are formed on the outer periphery of the mounting bracket 20. The connecting portions 22 are strip-shaped or block-shaped components extending radially. A chip groove 23 is formed between two adjacent connecting portions 22. Since the mounting bracket 20 and the water inlet interlayer 40 are spaced apart and do not interfere with each other, the size of the chip groove 23 can be designed to be larger, thereby obtaining a better chip removal effect.

[0041] The cone assembly 30 includes a tooth palm 31 and a cone 32. The tooth palm 31 is connected to the connection portion 22 and extends in the direction of the water inlet interlayer 40. The cone 32 is rotatably connected to one end of the tooth palm 31 away from the connection portion 22. A water spray hole facing the cone assembly 30 is opened on the rear side of the water inlet interlayer 40, and the water spray hole faces the cone 32. In some possible embodiments, a side of the water inlet interlayer 40 adjacent to the cone assembly 30 is provided with a plurality of water spray holes spaced along its own circumferential direction.

[0042] like Figure 1 and Figure 2 As shown, in a specific embodiment, each cone assembly 30 corresponds to two water spray holes, that is, the number of water spray holes is twice the number of cone assemblies 30. On a traditional reamer, one water spray hole corresponds to one cone 32, which is used to wash and cool the cone 32. In this embodiment, one cone 32 corresponds to two water spray holes, and the two water spray holes can be symmetrically distributed on both sides of the cone 32, so that the cleaning and cooling are more comprehensive.

[0043] See also Figure 2 In some possible embodiments, the water spray hole is connected to a water spray pipe 411, and the water outlet direction of the water spray pipe 411 is toward the corresponding cone assembly 30. The water spray pipe 411 can be a straight pipe or a curved pipe, and the water spray pipe 411 can be fixed to the water spray hole by threaded connection, welding, etc., and is connected to the water spray hole.

[0044] In this embodiment, one cone 32 corresponds to a plurality of water spray pipes 411. When one of the water spray pipes 411 is blocked by pebbles, the other water spray pipe 411 can continue to work, and the probability of complete blockage of the drilling fluid is greatly reduced.

[0045] See also Figure 4 and Figure 5 In some possible embodiments, the central axis 10 is provided with a plurality of water inlet holes 12 along its circumference, or the central axis 10 is provided with a plurality of water inlet holes 12 along its axial direction. Providing a plurality of water inlet holes 12 helps to increase the water intake.

[0046] See also Figure 3 and Figure 5In some possible embodiments, the mounting bracket 20 further includes a fixing portion 21, which is annular and connected to the central axis 10, and a plurality of connecting portions 22 are arranged at intervals along the circumference of the fixing portion 21. The fixing portion 21 and the connecting portion 22 can be integrally formed by casting or the like, or can be connected as a whole by assembly welding or the like.

[0047] See also Figure 1 and Figure 3 In some possible embodiments, a mounting groove is opened at one end of the connecting portion 22 away from the central axis 10, and the tooth palm 31 of the gear assembly 30 is arranged in the mounting groove. The mounting groove can be a square groove or a groove body of other shapes. The mounting groove is adapted to the shape and size of the mounting end of the tooth palm 31 and is used to accommodate the end of the tooth palm 31.

[0048] See also Figure 1 , Figure 3 , Figure 4 and Figure 5 In some possible embodiments, the water inlet interlayer 40 includes a first cover plate 41, a side plate 42 and a second cover plate 43. The first cover plate 41 is arranged on the central axis 10 and is located between the forward side of the gear assembly 30 and the water inlet hole 12. The first cover plate 41 is provided with a water spray hole; the side plate 42 is annular and is arranged on the side of the first cover plate 41 away from the gear assembly 30; the second cover plate 43 is connected to the central axis 10 and is arranged on the side of the side plate 42 away from the first cover plate 41. The second cover plate 43, the side plate 42 and the first cover plate 41 together enclose a water inlet cavity.

[0049] In this embodiment, the first cover plate 41, the side plate 42 and the second cover plate 43 enclose a water inlet cavity, the side plate 42 may be an annular or other annular member, the first cover plate 41 and the second cover plate 43 are respectively covered at both ends of the side plate 42, and the first cover plate 41 is provided with a water spray pipe 411. The first cover plate 41, the side plate 42 and the second cover plate 43 may be connected to the central shaft 10 by welding or the like.

[0050] See also Figure 1 , Figure 3 and Figure 5 In some possible embodiments, the roller reamer 1 further includes a straightening mechanism 50 , which includes a plurality of straightening plates 51 disposed on the forward side of the roller assembly 30 , and the plurality of straightening plates 51 are spaced apart along the circumference of the central axis 10 .

[0051] In this embodiment, the straightening mechanism 50 is arranged on the advancing side of the cone assembly 30 to straighten and guide the cone reamer 1 when it advances. The straightening mechanism 50 includes a plurality of straightening plates 51 , and the length direction of the straightening plates 51 extends along the axial direction of the central axis 10 .

[0052] See also Figure 1 , Figure 3 and Figure 5In some possible embodiments, a side avoidance groove is opened on the side of the straightening plate 51 adjacent to the central axis 10, the water inlet interlayer 40 is accommodated in the side avoidance groove, and the side plate 42 is connected to the plurality of straightening plates 51. The side plate 42 acts as a reinforcing ring, which can connect the plurality of straightening plates 51 into one, thereby improving the structural strength of the straightening mechanism 50.

[0053] It can be understood that the various parts in the above-mentioned embodiments can be freely combined or deleted to form different combination embodiments. The specific contents of each combination embodiment will not be repeated here. After this description, it can be considered that the utility model specification has recorded various combination embodiments and can support different combination embodiments.

[0054] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A roller reamer, characterized in that: include: The central shaft has a central hole extending through the central shaft along its axial direction, and a water inlet hole communicating with the central hole is provided on a side wall of the central shaft; A mounting bracket is arranged on the central axis, wherein the mounting bracket has a plurality of connecting parts formed along its circumference, the connecting parts extend along the radial direction of the central axis, and a chip removal groove is formed between two adjacent connecting parts; A plurality of cone assemblies are disposed one by one at an end of the connecting portion away from the central axis; and The water inlet interlayer is arranged on the outer periphery of the central axis and located on the forward side of the gear assembly. The water inlet interlayer has a water inlet cavity connected to the water inlet hole. A water spray hole is opened on one side of the water inlet interlayer adjacent to the gear assembly, and the water spray hole is connected to the water inlet cavity.

2. The roller reamer according to claim 1, characterized in that: The central axis is provided with a plurality of water inlet holes along its circumference.

3. The roller reamer according to any one of claims 1 or 2, characterized in that: The central axis is provided with a plurality of water inlet holes along its axial direction.

4. The roller reamer according to claim 1, characterized in that: The mounting bracket further comprises a fixing portion, which is annular and connected to the central axis, and a plurality of connecting portions are arranged at intervals along the circumference of the fixing portion.

5. The roller reamer according to claim 1, characterized in that: An installation groove is formed at one end of the connection portion away from the central axis, and the tooth base of the toothed wheel assembly is arranged in the installation groove.

6. The roller reamer according to claim 1, characterized in that: A plurality of water spray holes are provided along the circumference of the water inlet interlayer on one side adjacent to the cone assembly, and each cone assembly corresponds to one or more water spray holes.

7. The roller reamer according to any one of claims 1 or 6, characterized in that: The water spray hole is connected with a water spray pipe, and the water outlet direction of the water spray pipe is toward the corresponding gear assembly.

8. The roller reamer according to claim 1, characterized in that: The water inlet interlayer comprises: A first cover plate, arranged on the central axis and located between the forward side of the cone assembly and the water inlet hole, the first cover plate being provided with the water spray hole; a side plate, which is annular and is disposed on a side of the first cover plate facing away from the cone assembly; and The second cover plate is connected to the central axis and is arranged on a side of the side plate away from the first cover plate. The second cover plate, the side plate and the first cover plate are jointly enclosed to form the water inlet cavity.

9. The roller reamer according to claim 8, characterized in that: The roller reamer further comprises a straightening mechanism, wherein the straightening mechanism comprises a plurality of straightening plates arranged on the forward side of the roller assembly, and the plurality of straightening plates are arranged at intervals along the circumferential direction of the central axis.

10. The roller reamer according to claim 9, characterized in that: A side of the straightening plate adjacent to the central axis is provided with an avoidance groove, the water inlet interlayer is accommodated in the avoidance groove, and the side plate is connected to a plurality of the straightening plates.

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