Cone reamer

Abstract

The utility model belongs to the technical field of reamers, and particularly relates to a cone reamer. The cone reamer comprises a center shaft, a water inlet interlayer, a plurality of cone assemblies and a spray pipe, the center shaft is connected with the drill rod, and slurry can be conveyed to the water inlet interlayer through a center hole. The sealing part, the side plate and the sealing plate jointly define the water inlet interlayer, the spray pipe is arranged on the sealing plate, slurry is finally sprayed out through the spray pipe after entering the water inlet interlayer, and the effects of cooling, lubricating, deslagging and the like can be achieved. The mounting plate is divided into a sealing part in the center position and a plurality of mounting parts located in the circumferential direction of the sealing part, the sealing part corresponds to the sealing plate in the axial direction and can define a water inlet interlayer, and the mounting parts extend outwards in the radial direction and are used for mounting the cone assembly. By means of the arrangement, the size of the water inlet interlayer can be made to be small, the area of the corresponding chip discharging groove is increased, and the slag discharging efficiency is greatly improved.

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 expander is suitable for non-excavation engineering, pile foundation construction, mining and other fields. It is a tool used for hole expansion.

[0003] The general structure of a cone reamer includes a central shaft, an interlayer is arranged around the outer periphery of the central shaft, the central shaft is hollow inside and a water inlet hole connected to the interlayer is opened on the side wall for mud to enter the interlayer. The side wall of the interlayer is provided with multiple cone assemblies along its own circumference, and the end face of the water inlet interlayer is provided with a water outlet hole facing the cone assembly. When working, mud is supplied to the interior of the central shaft through the drill pipe, and the mud enters the interlayer through the water inlet hole and is sprayed out from the water outlet hole. The mud plays the role of flushing the cone, cooling the cone, reducing the friction between the cone and the hole wall, and protecting the drill hole.

[0004] When the cone reamer is working, it will break the inner wall of the hole and produce rock chips. Therefore, it is necessary to process the chip groove between the two cone assemblies so that the ejected mud can carry the rock chips and discharge them from the borehole through the chip groove. For the operating reamer, the discharge efficiency of mud and rock chips is important. Good chip discharge efficiency can avoid repeated crushing of rock chips by the drill bit and reduce the wear of the drill bit.

[0005] In order to facilitate production, the sandwich of the traditional structure of the roller reamer is welded by enclosing two upper and lower iron plates and circumferential side plates. The water spray hole is directly opened on the side of the roller as part of the tooth palm. The mud flows from the central axis into the sandwich composed of iron plates and then sprays out through the water spray hole. Under this structure, the tooth palm is directly welded to the sandwich, and the maximum outer diameter of the sandwich needs to match the tooth palm, which requires the sandwich to have a larger cross-sectional area, resulting in the area of ​​the chip removal groove cannot be made larger, which limits the chip removal efficiency. Utility Model Content

[0006] The utility model provides a roller reamer, aiming to solve the problem that the roller reamer in the prior art is restricted by the installation position of the tooth palm and the chip removal groove cannot be formed.

[0007] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: to provide a roller reamer, comprising:

[0008] 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;

[0009] The water inlet interlayer comprises a mounting plate, a side plate and a sealing plate, wherein the mounting plate and the sealing plate are arranged on the central axis at intervals along the axial direction of the central axis, the mounting plate has a sealing portion corresponding to the axial direction of the sealing plate, and a plurality of mounting portions extending radially along the sealing portion, the side plate is arranged along the circumferential direction of the central axis, and is enclosed with the sealing portion and the sealing plate to form an annular water inlet cavity, the water inlet cavity is communicated with the water inlet hole, a plurality of the mounting portions are arranged at intervals along the circumferential direction of the sealing portion, and a chip removal groove is formed between two adjacent mounting portions;

[0010] A plurality of cone assemblies are disposed on the mounting portion in a one-to-one correspondence; and

[0011] A plurality of nozzles are arranged on the sealing plate at intervals along the circumference of the central axis, the nozzles corresponding to the cone assemblies one by one, the water inlet ends of the nozzles are connected to the water inlet chamber, and the water outlet ends of the nozzles are arranged along the radial direction of the central axis and face the corresponding cone assemblies.

[0012] In a possible implementation, the cone assembly includes:

[0013] A tooth palm connected to the mounting portion and extending along the central axis toward the direction where the sealing plate is located; and

[0014] The gear is rotatably connected to one end of the gear palm adjacent to the sealing plate, and the nozzle faces the gear.

[0015] In a possible implementation, a mounting groove is formed on a side of the mounting plate adjacent to the side plate, and one end of the tooth palm is accommodated in the mounting groove.

[0016] In a possible implementation manner, a first rib is provided on a side of the mounting plate facing away from the side plate, and the first rib is connected to the central axis.

[0017] In a possible implementation, a plurality of the first ribs are provided in a one-to-one correspondence with the mounting portions, and a side of the first rib away from the central axis extends along a radial direction of the corresponding mounting portion.

[0018] In a possible implementation, the mounting plate has a thickness of 100 mm.

[0019] In a possible implementation, the nozzle is a 90° elbow, one end of the nozzle extends into the water inlet cavity, and the other end faces the corresponding cone assembly.

[0020] In a possible implementation, the mounting plate has six or more mounting portions, and the cone assemblies are provided with six or more corresponding mounting portions.

[0021] In a possible implementation, one end of the central axis is a male connector, and the other end is a female connector.

[0022] In a possible implementation, a plurality of second ribs are further provided on the outer periphery of the central shaft, the second ribs are located on a side of the sealing plate away from the mounting plate, and an annular reinforcement ring is connected between the plurality of second ribs.

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

[0024] The utility model provides a roller reamer comprising a central shaft, a water inlet interlayer, a plurality of roller assemblies and a nozzle. The central shaft is connected to a drill pipe and can transport mud to the water inlet interlayer through a central hole. The sealing part, the side plate and the sealing plate are enclosed together to form the water inlet interlayer. The nozzle is arranged on the sealing plate. After the mud enters the water inlet interlayer, it is finally sprayed out through the nozzle, which can play the role of cooling, lubricating, and slag removal.

[0025] The utility model improves the structure of the mounting plate, and the mounting plate is divided into a sealing part at the center and a plurality of mounting parts located circumferentially of the sealing part. The sealing part and the sealing plate correspond to each other axially, and can enclose to form a water inlet interlayer, and the mounting part extends radially outward to install the gear assembly. With such an arrangement, compared with the method of directly installing the gear assembly on the side wall of the water inlet interlayer in the prior art, the size of the water inlet interlayer can be made smaller, and the area of ​​the corresponding chip removal groove is increased, so that the slag removal efficiency is greatly improved. In order to solve the problem that the water spray hole cannot spray mud toward the gear assembly after the size of the improved water inlet interlayer becomes smaller, the utility model arranges a nozzle connected to the water inlet chamber on the sealing plate, and the water outlet end of the nozzle faces the corresponding gear assembly, so as to achieve the purpose of cleaning the gear, cooling the gear, and removing slag. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A schematic diagram of the structure of a roller reamer provided in one embodiment of the utility model Figure 1 ;

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

[0028] Figure 3 for Figure 2 Sectional view in the AA direction;

[0029] Figure 4 The structure of the side plate, the sealing plate and the nozzle in one embodiment of the utility model is shown in FIG. Figure 1 ;

[0030] Figure 5The structure of the side plate, the sealing plate and the nozzle in one embodiment of the utility model is shown in FIG. Figure 1 .

[0031] Description of reference numerals:

[0032] 1. Roller reamer;

[0033] 10. Center axis; 11. Center hole; 12. Water inlet hole; 13. Male joint; 14. Female joint; 15. Second rib; 16. Reinforcement ring;

[0034] 20. water inlet interlayer; 21. mounting plate; 211. sealing part; 212. mounting part; 213. first rib plate; 214. chip removal groove; 22. side plate; 23. sealing plate;

[0035] 30. Gear assembly; 31. Gear palm; 32. Gear;

[0036] 40. Nozzle. DETAILED DESCRIPTION

[0037] 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.

[0038] 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.

[0039] 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.

[0040] Please also read Figures 1 to 5 , the roller reamer 1 provided in the embodiment of the utility model is described below.

[0041] See also Figure 1 , Figure 2 and Figure 3The utility model provides a roller reamer 1, comprising a central shaft 10, a water inlet interlayer 20, a plurality of roller assemblies 30 and a plurality of nozzles 40. The central shaft 10 has a central hole 11 extending through the central shaft 10 in an axial direction, and a water inlet hole 12 communicating with the central hole 11 is provided on a side wall of the central shaft 10; the water inlet interlayer 20 comprises a mounting plate 21, a side plate 22 and a sealing plate 23, the mounting plate 21 and the sealing plate 23 are arranged on the central shaft 10 in an axial direction of the central shaft 10, the mounting plate 21 has a sealing portion 211 corresponding to the sealing plate 23 in an axial direction, and a plurality of mounting portions 211 extending radially along the sealing portion 211. 12, the side plate 22 is arranged along the circumference of the central axis 10, and is surrounded by the sealing portion 211 and the sealing plate 23 to form an annular water inlet chamber, the water inlet chamber is connected to the water inlet hole 12, a plurality of mounting portions 212 are arranged at intervals along the circumference of the sealing portion 211, and a chip removal groove 214 is formed between two adjacent mounting portions 212; a plurality of gear assemblies 30 are arranged on the mounting portions 212 in a one-to-one correspondence; a plurality of nozzles 40 are arranged on the sealing plate 23 in a circumferential direction of the central axis 10 in an one-to-one correspondence, and the nozzles 40 correspond to the gear assemblies 30 in a one-to-one correspondence, and the water outlet ends of the nozzles 40 are arranged along the radial direction of the central axis 10 and face the corresponding gear assemblies 30.

[0042] Compared with the prior art, the beneficial effects of the roller reamer 1 provided in the embodiment of the utility model are:

[0043] The roller reamer 1 provided by the embodiment of the utility model comprises a central shaft 10, a water inlet interlayer 20, a plurality of roller assemblies 30 and a nozzle 40. The central shaft 10 is connected to the drill pipe, and can transport mud to the water inlet interlayer 20 through the central hole 11. The sealing part 211, the side plate 22 and the sealing plate 23 are enclosed together to form the water inlet interlayer 20. The nozzle 40 is arranged on the sealing plate 23. After the mud enters the water inlet interlayer 20, it is finally sprayed out through the nozzle 40, which can play the role of cooling, lubrication, slag removal, etc.

[0044] The embodiment of the utility model improves the structure of the mounting plate 21, and the mounting plate 21 is divided into a sealing portion 211 at the center and a plurality of mounting portions 212 located around the sealing portion 211. The sealing portion 211 and the sealing plate 23 correspond to each other in the axial direction, and can enclose and form a water inlet interlayer 20. The mounting portion 212 extends radially outward for mounting the gear assembly 30. With such an arrangement, compared with the prior art method of directly mounting the gear assembly 30 on the side wall of the water inlet interlayer 20, the size of the water inlet interlayer 20 can be made smaller, and the area of ​​the corresponding chip removal groove 214 is increased, so that the slag removal efficiency is greatly improved. In order to solve the problem that the water spray hole cannot spray mud toward the gear assembly 30 after the size of the improved water inlet interlayer 20 becomes smaller, the utility model sets a nozzle 40 connected to the water inlet cavity on the sealing plate 23, and the water outlet end of the nozzle 40 faces the corresponding gear assembly 30, so as to achieve the purpose of cleaning the gear, cooling the gear, and removing slag.

[0045] From the perspective of the convenience of maintenance and replacement, when the tooth palm 31 and the tooth wheel 32 reach the end of their service life, they are generally cut off by gas welding and replaced with new tooth palm 31 and tooth wheel 32. In the prior art, when installing the tooth palm 31, it is necessary to first cut a notch in the water inlet interlayer, and then connect the water inlet interlayer and the tooth palm 31 together. When replacing, the water inlet interlayer needs to be opened and re-welded to seal. This method is time-consuming and labor-intensive, and there is a risk of leakage in the water inlet interlayer. The present application designs the water inlet interlayer to be smaller, which makes it faster and more convenient to replace the tooth palm 31 and the tooth wheel 32, and there is no need to consider the problem of re-sealing the water inlet interlayer. The level requirements for welders are lower, which is conducive to replacement in environments with poor welding conditions such as construction sites.

[0046] The central shaft 10 in the embodiment of the utility model has a through central hole 11, and a water inlet hole 12 connected to the central hole 11 is provided on the side wall of the central shaft 10, and the setting position of the water inlet cavity corresponds to the water inlet hole 12. When in use, the central shaft 10 is connected to the drill rod, and the mud is transported through the drill rod, and the mud enters the water inlet cavity through the water inlet hole 12. One or more water inlet holes 12 can be provided as needed, and when multiple water inlet holes 12 are provided, the multiple water inlet holes 12 are arranged at intervals along the circumferential direction of the central shaft 10.

[0047] For easy connection with drill pipe, please refer to Figure 1 and Figure 3 In some possible embodiments, one end of the central shaft 10 is a male connector 13, and the other end is a female connector 14. The male connector 13 has an external thread, and the female connector 14 has an internal thread, specifically a tapered thread.

[0048] The main component of the mud is bentonite, which can remove the broken rock chips from the borehole. The mud with rock chips can be filtered through a vibrating screen and then flow back into the drill pipe for repeated use. In addition to removing chips, the mud also has other functions: cleaning, the mud can wash the cone to keep it clean and avoid drilling; cooling, cooling the cone to avoid damage due to high temperatures generated during the rock crushing process; lubricating, reducing the friction between the drill bit and the hole wall; wall protection, the sprayed mud fills the hole and can prevent hole collapse to a certain extent.

[0049] In this embodiment, the water inlet interlayer 20 is formed by a mounting plate 21, a side plate 22 and a sealing plate 23. The sealing plate 23 is a circular plate, and the central position allows the central axis 10 to pass through. The sealing plate 23 is annular and is arranged around the outer periphery of the sealing plate 23. The mounting plate 21 is divided into a sealing portion 211 and a mounting portion 212 according to its function. The mounting portion 212 is used for welding and fixing the gear assembly 30. The sealing portion 211 can be a circle with the same diameter as the sealing plate 23. The sealing plate 23, the sealing plate 23 and the side plate 22 enclose a water inlet cavity surrounding the central axis 10. The mounting plate 21, the side plate 22 and the sealing plate 23, the mounting plate 21 and the central axis 10, and the sealing plate 23 and the central axis 10 can be fixed as a whole by welding. After the welding is completed, a pressure test is performed to ensure that the water inlet cavity will not leak under a certain pressure.

[0050] Since the radial dimension of the water inlet interlayer 20 is reduced, there is no overlap with the cone in the axial direction, and the method of directly opening the water spray hole on the sealing plate 23 will cause the mud to be unable to be sprayed onto the cone. In order to solve this problem, the present embodiment installs a nozzle 40 on the sealing plate 23, and the nozzle 40 can change the spray direction so that the mud is sprayed onto the corresponding cone. The nozzle 40 can be installed on the sealing plate 23 by welding, threaded connection, etc.

[0051] See also Figure 1 and Figure 3 In some possible embodiments, the gear assembly 30 includes a tooth palm 31 and a gear 32. The tooth palm 31 is connected to the mounting portion 212 and extends along the central axis 10 toward the direction where the sealing plate 23 is located; the gear 32 is rotatably connected to one end of the tooth palm 31 adjacent to the sealing plate 23, and the nozzle 40 faces the gear 32.

[0052] In this embodiment, the cone assembly 30 includes a cone 31 and a cone 32. The cone 31 is fixedly mounted on the mounting portion 212, and the cone 32 is rotatably connected to the cone 31. In order to facilitate the installation and positioning of the cone 31, please refer to Figure 1 and Figure 3 In some possible embodiments, a mounting groove is provided on one side of the mounting plate 21 adjacent to the side plate 22, and one end of the tooth palm 31 is accommodated in the mounting groove. The mounting groove is provided at the edge of the mounting plate 21 adjacent to the side plate 22, and the mounting groove can be a square groove body adapted to the tooth palm 31.

[0053] See also Figure 1 and Figure 3 In order to improve the overall connection strength between the mounting plate 21 and the central shaft 10 , in some possible embodiments, a first rib 213 is provided on the side of the mounting plate 21 away from the side plate 22 , and the first rib 213 is connected to the central shaft 10 .

[0054] There is no limitation on the shape of the first rib 213 , which may be fan-shaped, triangular, square, etc. The first rib 213 may be connected to the mounting plate 21 by welding, integral casting, etc.

[0055] See also Figure 1 , Figure 2 and Figure 3 In some possible embodiments, a plurality of first ribs 213 are provided corresponding to the mounting portions 212 , and a side of the first rib 213 away from the central axis 10 extends radially along the corresponding mounting portion 212 .

[0056] In some possible embodiments, the thickness of the mounting plate 21 is 100 mm. Of course, the mounting plate 21 can also be manufactured in sizes of 80 mm, 110 mm, etc. as needed to meet the usage requirements.

[0057] See also Figure 4 and Figure 5 In some possible embodiments, the nozzle 40 may be a 90° elbow, with one end of the nozzle 40 extending into the water inlet cavity and the other end facing the corresponding cone assembly 30, so that the mud can be smoothly sprayed onto the surface of the cone.

[0058] See also Figure 1 and Figure 2 In some possible embodiments, the mounting plate 21 has six or more mounting portions 212, and the cone assembly 30 is provided with six or more corresponding mounting portions 212. In addition, the number of the cone assembly 30 and the mounting portions 212 can be set to five, eight, etc. as needed.

[0059] See also Figure 1 and Figure 3 In some possible embodiments, a plurality of second ribs 15 are further provided on the periphery of the central shaft 10. The second ribs 15 are located on the side of the sealing plate 23 away from the mounting plate 21. An annular reinforcement ring 16 is connected between the plurality of second ribs 15. The second ribs 15 are provided at the forward end of the central shaft 10 and can guide the forward movement of the reamer. The plurality of second ribs 15 are connected as a whole by the reinforcement ring 16, and the structural strength is higher.

[0060] 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.

[0061] 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; The water inlet interlayer comprises a mounting plate, a side plate and a sealing plate, wherein the mounting plate and the sealing plate are arranged on the central axis at intervals along the axial direction of the central axis, the mounting plate has a sealing portion corresponding to the axial direction of the sealing plate, and a plurality of mounting portions extending radially along the sealing portion, the side plate is arranged along the circumferential direction of the central axis, and is enclosed with the sealing portion and the sealing plate to form an annular water inlet cavity, the water inlet cavity is communicated with the water inlet hole, a plurality of the mounting portions are arranged at intervals along the circumferential direction of the sealing portion, and a chip removal groove is formed between two adjacent mounting portions; A plurality of cone assemblies are arranged on the mounting portion in a one-to-one correspondence; as well as A plurality of nozzles are arranged on the sealing plate at intervals along the circumference of the central axis, the nozzles corresponding to the cone assemblies one by one, the water inlet ends of the nozzles are connected to the water inlet chamber, and the water outlet ends of the nozzles are arranged along the radial direction of the central axis and face the corresponding cone assemblies.

2. The roller reamer according to claim 1, characterized in that: The cone assembly comprises: A tooth palm connected to the mounting portion and extending along the central axis toward the direction where the sealing plate is located; and The gear is rotatably connected to one end of the gear palm adjacent to the sealing plate, and the nozzle faces the gear.

3. The roller reamer according to claim 2, characterized in that: A mounting groove is provided on one side of the mounting plate adjacent to the side plate, and one end of the tooth palm is accommodated in the mounting groove.

4. The roller reamer according to claim 1, characterized in that: A first rib is provided on a side of the mounting plate away from the side plate, and the first rib is connected to the central axis.

5. The roller reamer according to claim 4, characterized in that: A plurality of the first ribs are provided in one-to-one correspondence with the mounting portions, and a side of the first rib away from the central axis extends along the radial direction of the corresponding mounting portion.

6. The roller reamer according to claim 1, characterized in that: The thickness of the mounting plate is 100 mm.

7. The roller reamer according to claim 1, characterized in that: The nozzle is a 90° curved pipe, one end of which extends into the water inlet cavity, and the other end faces the corresponding cone assembly.

8. The roller reamer according to claim 1, characterized in that: The mounting plate has six mounting portions, and six gear assemblies are corresponding to the mounting portions.

9. The roller reamer according to claim 1, characterized in that: One end of the central shaft is a male connector, and the other end is a female connector.

10. The roller reamer according to claim 1, characterized in that: A plurality of second ribs are also provided on the outer periphery of the central shaft. The second ribs are located on a side of the sealing plate away from the mounting plate. An annular reinforcement ring is connected between the plurality of second ribs.

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