Drilling structure and drilling equipment

Abstract

The utility model provides a drilling structure which comprises a drill rod, an eccentric drill bit and a sleeve. The eccentric drill bit is connected with the drill rod, the eccentric drill bit comprises a drill bit body and an eccentric part arranged on one side of the circumferential surface of the drill bit body, and the maximum diameter of the drill bit body is smaller than the inner diameter of the sleeve; the sleeve is arranged outside the drill bit body in a sleeving mode, and the head of the drill bit body and at least part of the eccentric part are located outside the sleeve. A receding groove is formed in one side of the sleeve, the receding groove penetrates through the sleeve wall of the sleeve in the axial direction, and the width of the eccentric part is smaller than that of the receding groove. Meanwhile, the utility model further provides drilling equipment. Compared with the prior art, the drilling structure and the drilling equipment provided by the utility model can improve the construction efficiency and reduce the construction cost.

Description

Technical Field

[0001] The utility model relates to the technical field of drilling equipment, in particular to a drilling structure and drilling equipment. Background Art

[0002] With the development of industry and the continuous advancement of various construction projects, drilling equipment is widely used in the opening operations of various engineering construction projects.

[0003] The current steps in underground anchor construction are to first drill a hole with drilling equipment. When the drilling depth reaches the required depth, a sleeve is placed in the hole and mortar is injected to ensure that the sleeve is vertical and maintains stability. The anchor is then anchored after the mortar solidifies.

[0004] However, in the existing technology, when performing anchor rod construction, it is necessary to first drill a hole using drilling equipment, then move the drill bit out of the construction hole, and then place a sleeve in the hole. The overall construction requires many steps and is inefficient, which increases labor costs, time costs, machine wear and tear, and other costs. Utility Model Content

[0005] In view of the technical problem that in the prior art anchor bolt construction, it is necessary to first drill a hole and then place a sleeve, which results in low construction efficiency and increased costs, the utility model provides a drilling structure that can simultaneously place a sleeve into the hole during the drilling process, thereby reducing the number of steps required for construction, improving construction efficiency and reducing construction costs.

[0006] A drilling structure comprising a drill rod, an eccentric drill bit and a sleeve;

[0007] The eccentric drill bit is connected to the drill rod, and the eccentric drill bit includes a drill bit body and an eccentric portion provided on one side of the circumferential surface of the drill bit body, and the maximum diameter of the drill bit body is smaller than the inner diameter of the sleeve;

[0008] The sleeve is sleeved on the outside of the drill body, and the head of the drill body and the eccentric portion are at least partially located outside the sleeve;

[0009] A relief groove is provided on one side of the sleeve. The relief groove penetrates the wall of the sleeve in the axial direction, and the width of the eccentric portion is smaller than the width of the relief groove.

[0010] Preferably, it also includes a connecting sleeve;

[0011] The sleeve is located between the connecting sleeve and the eccentric portion, and one end of the sleeve abuts against the end surface of the connecting sleeve.

[0012] Preferably, the eccentric drill bit is an integrated eccentric drill bit.

[0013] Preferably, along the axial direction of the drill bit body, the drill bit body includes a head and a stem which are arranged in sequence, the stem is at least partially located in the sleeve, and the head is located outside the sleeve.

[0014] Preferably, the gap between the outer peripheral surface of the rod and the inner surface of the sleeve is 2-3 mm.

[0015] Preferably, the diameter of the construction hole opened by the eccentric portion is larger than the outer diameter of the sleeve.

[0016] Preferably, the diameter of the construction hole opened by the eccentric portion is 1-3 mm larger than the outer diameter of the sleeve.

[0017] Preferably, a central channel is opened inside the rod;

[0018] A powder discharge groove is provided on the outer periphery of the head, and a first connecting hole communicating with the central channel is provided inside the head, and the first connecting hole extends to the end surface of the head.

[0019] Preferably, a second connecting hole is further provided inside the head, and the second connecting hole connects the central channel with the powder discharge groove.

[0020] A drilling device is provided, which is applied with the drilling structure as described in any one of the above.

[0021] Compared with the prior art, the drilling structure provided by the present invention includes a drill rod, an eccentric drill bit and a sleeve; the eccentric drill bit is connected to the drill rod, and the eccentric drill bit includes a drill body and an eccentric portion arranged on one side of the circumferential surface of the drill body, and the maximum diameter of the drill body is smaller than the inner diameter of the sleeve; the sleeve is sleeved on the outside of the drill body, and the head of the drill body and the eccentric portion are at least partially located outside the sleeve; an avoidance groove is opened on one side of the sleeve, and the avoidance groove penetrates the wall of the sleeve along the axial direction, and the width of the eccentric portion is smaller than the width of the avoidance groove. The sleeve is provided in the drilling structure, and the avoidance groove is provided on the sleeve, and the eccentric part is provided in the eccentric drill bit. Before drilling, the eccentric part in the eccentric drill bit can be aligned with the avoidance groove, so that the eccentric drill bit can pass through the sleeve, and then drilling can be performed. During the drilling process, the sleeve can be synchronously driven into the hole, thereby saving the steps required for construction, improving construction efficiency, and reducing construction costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0023] Figure 1 A schematic structural diagram of a drilling structure provided in one embodiment;

[0024] Figure 2 for Figure 1 A structural schematic diagram of the drilling structure shown in another angle;

[0025] Figure 3 for Figure 1 A schematic diagram of the three-dimensional structure of the sleeve shown;

[0026] Figure 4 for Figure 3 A schematic diagram of the planar structure of the sleeve shown;

[0027] Figure 5 A schematic cross-sectional structure diagram of an eccentric drill bit provided in one embodiment. DETAILED DESCRIPTION

[0028] In order to help those skilled in the art better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without making any creative efforts shall fall within the scope of protection of this application.

[0029] It should be noted that when a component is referred to as being “fixed on”, “mounted on” or “set on” another component, it can be directly on the other component or indirectly set on the other component; when a component is “connected” to another component, or a component is referred to as being “connected to” another component, it can be directly connected to the other component or indirectly connected to the other component.

[0030] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0031] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. Throughout the description of this application, "plurality" or "several" means two or more, unless otherwise specifically defined.

[0032] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the conditions under which this application can be implemented. Therefore, they have no substantive technical significance. Any structural modification, change in proportional relationship or adjustment of size should still fall within the scope of the technical content disclosed in this application without affecting the efficacy and purpose that can be achieved by this application.

[0033] The utility model provides a drilling structure, which includes a drill rod, an eccentric drill bit and a sleeve; the eccentric drill bit is connected to the drill rod, and the eccentric drill bit includes a drill body and an eccentric portion arranged on one side of the circumferential surface of the drill body, and the maximum diameter of the drill body is smaller than the inner diameter of the sleeve; the sleeve is sleeved on the outside of the drill body, and the head of the drill body and the eccentric portion are at least partially located outside the sleeve; an avoidance groove is opened on one side of the sleeve, and the avoidance groove penetrates the cylinder wall of the sleeve along the axial direction, and the width of the eccentric portion is smaller than the width of the avoidance groove. The sleeve is provided in the drilling structure, and the avoidance groove is provided on the sleeve, and the eccentric part is provided in the eccentric drill bit. Before drilling, the eccentric part in the eccentric drill bit can be aligned with the avoidance groove, so that the eccentric drill bit can pass through the sleeve, and then drilling can be performed. During the drilling process, the sleeve can be synchronously driven into the hole, thereby saving the steps required for construction, improving construction efficiency, and reducing construction costs.

[0034] Please refer to Figures 1 to 5 In one embodiment, a drilling structure 100 is provided, which is mainly used to solve the problem in the prior art that during anchor construction, drilling and placing sleeves need to be carried out in two steps, resulting in low construction efficiency and high construction cost.

[0035] The drilling structure 100 includes a drill rod 10, an eccentric drill bit 20, and a sleeve 30. The eccentric drill bit 20 is connected to the drill rod 10 and includes a drill body 21 and an eccentric portion 22 disposed on one side of the circumferential surface of the drill body 21. The maximum diameter of the drill body 21 is smaller than the inner diameter of the sleeve 30. The sleeve 30 is sleeved over the drill body 21, with the head of the drill body 21 and the eccentric portion 22 at least partially located outside the sleeve 30. That is, the head of the drill body 21 is at least partially located outside the sleeve 30, and the eccentric portion 22 is at least partially located outside the sleeve 30, so that the sleeve 30 does not affect the head of the drill body 21 and the eccentric portion 22 during normal drilling operations.

[0036] A relief groove 31 is defined on one side of the sleeve 30, extending axially through the wall of the sleeve 30. The width of the eccentric portion 22 is smaller than the width of the relief groove 31. It is understood that because the maximum diameter of the drill bit body 21 is smaller than the inner diameter of the sleeve 30, and the width of the eccentric portion 22 is smaller than the width of the relief groove 31, when the eccentric portion 22 is aligned with the relief groove 31, the eccentric drill bit 20 can smoothly pass through the sleeve 30 axially without being blocked by the sleeve 30, allowing the eccentric drill bit 20 to smoothly enter or exit the sleeve 30.

[0037] When drilling, the eccentric portion 22 on the eccentric drill bit 20 can be aligned with the avoidance groove 31 on the sleeve 30, and then the eccentric drill bit 20 can be inserted into the sleeve 30 and out from the other end of the sleeve 30. After the eccentric drill bit 20 and the drill rod 10 are placed, the sleeve 30 can be rotated to allow the eccentric portion 22 to deviate from the avoidance groove 31, and then the drilling operation can be performed. In this way, the sleeve 30 can also be placed into the hole during the drilling process. When the drilling is completed and the sleeve 30 enters the construction hole to the required depth, the eccentric drill bit 20 can be rotated again to align the eccentric portion 22 with the avoidance groove 31, and then the drill rod 10 and the eccentric drill bit 20 can be raised to complete the simultaneous construction of drilling and sleeve placement.

[0038] Understandably, in existing downhole anchor bolting techniques, drilling is first performed, followed by removing the drill bit and other components from the hole before inserting the sleeve. Drilling and sleeve placement are performed in two separate steps, resulting in low construction efficiency and increased labor, time, and equipment wear and tear.

[0039] The drilling structure 100 provided in this embodiment has the avoidance groove 31 formed on the sleeve 30, and the eccentric portion 22 formed on the eccentric drill bit 20. The eccentricity principle ensures that the eccentric drill bit 20 can be placed and passed through the sleeve 30 before drilling, and can be smoothly retrieved from the construction hole after drilling is completed. Before drilling, the eccentric drill bit 20 can be passed through the sleeve 30, and then the hole can be drilled through the drill bit body 21 and the eccentric portion 22. During the drilling process, the sleeve 30 can be inserted into the hole. The drilling structure 100 can simplify the construction process, combining the drilling and sleeve placement steps into one, thereby improving construction efficiency, reducing labor costs, time costs, equipment wear and tear, and improving construction quality. In addition, the sleeve 30 is simultaneously inserted into the construction hole during the drilling process, and the sleeve 30 can also serve as a support to prevent the construction hole from collapsing.

[0040] Preferably, in one embodiment, the eccentric drill bit 20 is an integrated eccentric drill bit. The integrated eccentric drill bit refers to: the eccentric portion 22 and the drill body 21 are an integrated fixed structure, and the two are fixed to each other as a whole, rather than a combined or movable structure. It is understandable that the drill bits with eccentric mechanisms in the prior art usually adopt a combined or movable structure, and the eccentric mechanism can usually rotate relative to the drill body, thereby realizing the folding and unfolding of the eccentric mechanism. However, the use of a combined or movable structure in the prior art makes the overall structure of the drill bit more complicated, the drill bit is difficult to process, and there are many connection points, so the drill bit is easily damaged. In this embodiment, the eccentric portion 22 and the drill body 21 adopt an integrated fixed structure, which makes the overall structure of the drill bit simpler, the overall structure is simple to process, can ensure good matching, is not prone to damage, and has a longer service life.

[0041] Preferably, in one embodiment, the drilling structure 100 further includes a connecting sleeve 40, the sleeve 30 is located between the connecting sleeve 40 and the eccentric portion 22, and one end of the sleeve 30 abuts against the end face of the connecting sleeve 40. In other words, the upper end face of the sleeve 30 is limited by the connecting sleeve 40. The connecting sleeve 40 is connected to the drilling equipment. When the drilling equipment drives the eccentric drill bit 20 to perform drilling operations, the drilling equipment will synchronously drive the connecting sleeve 40 forward, so that during the drilling process, the sleeve 30 can be automatically pushed into the construction hole by the drilling equipment, further reducing the construction difficulty and improving the construction efficiency. The connecting sleeve 40 and the back of the eccentric portion 22 can also play a straightening role.

[0042] Preferably, in one embodiment, along the axial direction of the drill bit body 21, the drill bit body 21 includes a head 211 and a stem 212, which are sequentially arranged. The stem 212 is at least partially located in the sleeve 30, and the head 211 is located outside the sleeve 30. The head 211 is mainly used for drilling operations, while the eccentric portion 22 is used to cooperate with reaming to expand the diameter of the construction hole.

[0043] Specifically, in one embodiment, alloy teeth are provided on the head portion 211 and the eccentric portion 22 respectively, so as to further improve the efficiency of hole opening and hole expansion and better avoid component wear.

[0044] Preferably, in one embodiment, the gap between the outer peripheral surface of the rod portion 212 and the inner surface of the sleeve 30 is 2-3 mm, thereby better avoiding contact between the rod portion 212 and the inner surface of the sleeve 30 and avoiding wear between the two.

[0045] Preferably, in one embodiment, the diameter of the construction hole formed by the eccentric portion 22 is larger than the outer diameter of the sleeve 30. In other words, radially, the outermost surface of the portion of the eccentric portion 22 used for expanding the hole is located outside the outer surface of the sleeve 30, so that the maximum hole diameter of the eccentric portion 22 is larger than the outer diameter of the sleeve 30, making it easier to place the sleeve 30 into the construction hole.

[0046] Specifically, in one embodiment, the diameter of the construction hole formed by the eccentric portion 22 is 1-3 mm larger than the outer diameter of the sleeve 30 .

[0047] Preferably, in one embodiment, a central channel 2121 is defined within the rod portion 212, a powder discharge groove 2111 is defined on the periphery of the head portion 211, and a first connecting hole 2112 is defined within the head portion 211 that communicates with the central channel 2121. The first connecting hole 2112 extends to an end surface 2113 of the head portion 211. The central channel 2121 can be connected to a corresponding air passage in the drilling equipment, so that during slag discharge, airflow enters from the central channel 2121 and is discharged from the first connecting hole 2112. The airflow then flows to the powder discharge groove 2111, whereby fallen debris and other materials are discharged from the construction hole.

[0048] More preferably, in one embodiment, a second connecting hole 2114 is further defined within the head portion 211, connecting the central channel 2121 with the powder discharge groove 2111. During slag discharge, airflow enters the central channel 2121 and then exits through the first and second connecting holes 2112 and 2114, respectively, flowing out from the end face 2113 of the head portion 211 and the powder discharge groove 2111. The airflow then guides fallen debris and other materials out of the construction hole, further improving the slag discharge effect and efficiency.

[0049] At the same time, in one embodiment, a drilling device is also provided, which is applied with the drilling structure 100. Before drilling, the eccentric portion 22 of the eccentric drill bit 20 is first aligned with the avoidance groove 31 of the sleeve 30, and then the eccentric drill bit 20 is inserted into the sleeve 30. After the eccentric drill bit 20 and the drill rod 10 are placed, the sleeve 30 is rotated so that the avoidance groove 31 deviates from the eccentric portion 22. When drilling, the head 211 and the eccentric portion 22 together play a role in opening the hole, and the end face of the connecting sleeve 40 plays a role in pushing the sleeve 30. When the depth of the sleeve 30 entering the construction hole meets the requirements, the eccentric drill bit 20 is rotated so that the eccentric portion 22 is aligned with the avoidance groove 31, and then the drill rod 10 and the eccentric drill bit 20 are pulled out.

[0050] The above is only an embodiment of the present invention. It should be pointed out that those skilled in the art can make improvements without departing from the inventive concept of the present invention, but these improvements are all within the scope of protection of the present invention.

Claims

1. A drilling structure, characterized in that: Including drill rod, eccentric drill bit and sleeve; The eccentric drill bit is connected to the drill rod, and the eccentric drill bit includes a drill bit body and an eccentric portion provided on one side of the circumferential surface of the drill bit body, and the maximum diameter of the drill bit body is smaller than the inner diameter of the sleeve; The sleeve is sleeved on the outside of the drill body, and the head of the drill body and the eccentric portion are at least partially located outside the sleeve; A relief groove is provided on one side of the sleeve. The relief groove penetrates the wall of the sleeve in the axial direction, and the width of the eccentric portion is smaller than the width of the relief groove.

2. The drilling structure according to claim 1, characterized in that: Also includes a connecting sleeve; The sleeve is located between the connecting sleeve and the eccentric portion, and one end of the sleeve abuts against the end surface of the connecting sleeve.

3. The drilling structure according to claim 1, characterized in that: The eccentric drill bit is an integrated eccentric drill bit.

4. The drilling structure according to claim 1, characterized in that: Along the axial direction of the drill bit body, the drill bit body includes a head and a stem portion which are sequentially arranged. The stem portion is at least partially located in the sleeve, and the head is located outside the sleeve.

5. The drilling structure according to claim 4, characterized in that: The gap between the outer peripheral surface of the rod and the inner surface of the sleeve is 2-3 mm.

6. The drilling structure according to claim 4, characterized in that: The diameter of the construction hole opened by the eccentric part is larger than the outer diameter of the sleeve.

7. The drilling structure according to claim 6, characterized in that: The diameter of the construction hole opened by the eccentric part is 1-3 mm larger than the outer diameter of the sleeve.

8. The drilling structure according to claim 4, characterized in that: A central channel is provided inside the rod; A powder discharge groove is provided on the outer periphery of the head, and a first connecting hole communicating with the central channel is provided inside the head, and the first connecting hole extends to the end surface of the head.

9. The drilling structure according to claim 8, characterized in that: A second connecting hole is further provided inside the head, and the second connecting hole connects the central channel with the powder discharge groove.

10. A drilling device, characterized in that: The drilling structure according to any one of claims 1 to 9 is used.

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