Bundling down-the-hole drill and combined drilling tool using same

Abstract

The utility model discloses a cluster down-the-hole drill and a combined drilling tool using the same, and belongs to the technical field of drilling tools. The cluster down-the-hole drill comprises a drill bit body, and the drill bit body is provided with an eccentric reaming piece which is movably arranged; wherein the drill bit body is provided with lateral faces which are arranged in parallel, and the outer edge of the drill bit body is provided with arc faces located on the two side edges of the two lateral faces and matching faces arranged in an angle mode. The cambered surface and one of the lateral surfaces are in transition with the front end surface of the drill bit body through a first tooth surface, and first alloy is arranged on the first tooth surface and the front end surface of the drill bit body; second tooth surfaces at the same positions as the first tooth surfaces are arranged on the side face of the eccentric reaming piece and the front end face of the eccentric reaming piece, and second alloy is arranged on the second tooth surfaces. The drilling tool is used for solving the problems of low hole forming efficiency and poor hole forming quality caused by replacement of the drilling tool in the drilling operation.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of drilling tools, in particular to a cluster DTH drill and a combined drilling tool using the DTH drill. BACKGROUND

[0002] In the current infrastructure construction, drilling operation is an indispensable link, which is directly related to the progress and quality of the project. With the rapid development of the national economy, the efficiency and quality requirements of drilling operation are getting higher and higher.

[0003] Drilling operation includes drilling, reaming and other steps. At present, most impact drills need to replace the corresponding drill bit when carrying out different operations, that is, most operations adopt the way of drilling first and then reaming, which will bring some problems, such as high labor intensity of replacing drill bit, low efficiency of hole forming operation, and low hole expansion perpendicularity and poor hole forming quality in the reaming process after replacing the drill bit. SUMMARY

[0004] In view of the above problems, the present application provides a cluster DTH drill and a combined drilling tool using the DTH drill, which is used to solve the problems of low hole forming efficiency and poor hole forming quality caused by replacing the drill in drilling operation.

[0005] To achieve the above purpose, the technical scheme adopted by the present application is: a cluster DTH drill, comprising a drill bit body, the drill bit body has an eccentric reaming member movably arranged thereon;

[0006] Among them, the drill bit body has two lateral faces arranged in parallel, the outer edge of the drill bit body has an arc surface located at the position of the two lateral faces and an angle arranged matching surface;

[0007] The arc surface and one of the lateral faces are connected to the front end surface of the drill bit body through a first tooth surface, the first alloy is arranged on the first tooth surface and the front end surface of the drill bit body;

[0008] The second tooth surface with the same position as the first tooth surface is arranged on the side surface of the eccentric reaming member and the front end surface of the eccentric reaming member, and the second alloy is arranged on the second tooth surface.

[0009] Compared with the prior art, the present application has the beneficial effects that: by setting the movable eccentric reaming part, the eccentric reaming part can be retracted to the middle during drilling to realize the drilling operation, and the eccentric reaming part can be moved outward beyond the outer edge of the drill bit body during reaming to complete the reaming operation; since the size of the drill hole and the size of the outer edge of the drill bit body are the same, the drill bit can be well guided during reaming, thus avoiding the problems of poor perpendicularity of the formed hole and poor quality of the formed hole, and one drill bit can realize the drilling and reaming operations without the need of replacing different drill bits, the precision of cooperation is higher, and the work efficiency can be significantly improved.

[0010] As a further improvement of the above-mentioned scheme, the drill bit body is provided with a sliding channel, and the eccentric reaming part slides on the drill bit body along the sliding channel;

[0011] The sliding channel is provided with a ball groove, and the ball groove is provided with balls facilitating the sliding of the eccentric reaming part.

[0012] The above-mentioned improved technical effects are that: the sliding channel limits the movement path of the eccentric reaming part, and the ball groove and the balls can provide more excellent movement guiding effect for the eccentric reaming part to avoid being stuck by rock powder during drilling.

[0013] As a further improvement of the above-mentioned scheme, the eccentric reaming part is provided with a pin hole, and the pin hole is provided with a locking pin facilitating the contact and clamping of the eccentric reaming part after the contact with the balls.

[0014] The above-mentioned improved technical effects are that: the locking pin can be inserted into the pin hole and clamped with the balls after the eccentric reaming part is moved to the required working position, so as to lock the position of the eccentric reaming part.

[0015] As a further improvement of the above-mentioned scheme, the drill bit body is provided with a plurality of air holes, and one of the air holes is in communication with the sliding channel;

[0016] The front end surface of the drill bit body is provided with a residue discharge groove in communication with the residue discharge hole.

[0017] The above-mentioned improved technical effects are that: the air holes can guide the gas in the main gas pipe of the drill bit outward, the rock powder and debris can be blown outward during drilling, especially the rock powder in the sliding channel can be blown out to avoid the powder sticking, and the residue discharge groove can facilitate the residue discharge during drilling.

[0018] As a further improvement of the above-mentioned scheme, the eccentric reaming part is further provided with a third tooth surface, and the side surface of the eccentric reaming part and the third tooth surface are further provided with protective teeth.

[0019] The drill bit body is provided with a spline for facilitating connection and installation.

[0020] The third tooth surface and the protection tooth are mainly used for protecting the whole drilling tool during drilling operation, and the spline is used for installation with the impact hammer.

[0021] The combination drilling tool comprises a plurality of cluster DTH drills, wherein the cluster DTH drills are arranged on the impact hammer in an array, and the matching surfaces on the drill bit bodies of different cluster DTH drills are matched with each other.

[0022] The combination drilling tool comprises a plurality of cluster DTH drills, wherein the cluster DTH drills are arranged on the impact hammer in an array, and the matching surfaces on the drill bit bodies of different cluster DTH drills are matched with each other.

[0023] As a further improvement of the above-mentioned scheme, the angle of the matching surface is 360 / n, wherein n is an integer greater than 1.

[0024] The angle of the matching surface is limited, so that the installation of different numbers of cluster DTH drills can be realized.

[0025] As a further improvement of the above-mentioned scheme, when the number of cluster DTH drills is 1, the angle of the matching surface is less than 180°.

[0026] When the number of cluster DTH drills is 1, the cluster DTH drill is directly installed on the impact hammer for drilling operation, and the angle of the matching surface provides partial cutting or material discharge during drilling operation. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 is a sectional view of the structure of the present application;

[0028] Figure 2 is a sectional view of the structure of the present application; Figure 1

[0029] Figure 3 is a sectional view of the structure of the present application; Figure 2

[0030] Figure 4 is a sectional view of the structure of the present application;

[0031] Figure 5 is a sectional view of the structure of the present application;

[0032] Figure 6 is a sectional view of the structure of the present application; Figure 4

[0033] ​​​In the diagram: 1. Drill bit body; 2. Eccentric reamer; 3. Locking pin; 4. Ball bearing; 5. Ball bearing groove; 6. Slide rail; 7. Air hole; 8. First tooth surface; 9. First alloy; 10. Slag discharge groove; 11. Slag discharge hole; 12. Spline; 13. Second tooth surface; 14. Second alloy; 15. Third tooth surface; 16. Protective tooth; 17. Pin hole; 18. Side surface; 19. Arc surface; 20. Mating surface; 21. Impact hammer; 22. Notch. Detailed Implementation

[0034] To enable those skilled in the art to better understand the technical solution, the present invention will be described in detail below with reference to embodiments. The description in this part is only exemplary and explanatory, and should not be used to limit the scope of protection of the present invention in any way.

[0035] like Figures 1-4 As shown, the specific solution of this embodiment is: a cluster down-the-hole drill, including a drill bit body 1, and an eccentric reamer 2 movably disposed on the drill bit body 1. The eccentric reamer 2 is specifically block-shaped, such as... Figure 1 , 2 As shown, at this time, the eccentric reamer 2 is pushed outward and becomes eccentric. This state is used for reaming during the drilling process. Conversely, when it retracts to the non-eccentric state and does not exceed the outer edge of the drill bit body 1, it is used for drilling during the drilling process.

[0036] The drill bit body 1 has parallel side surfaces 18 for attaching... Figure 2 Taking the left and right directions of the view as an example, during drilling, the drill bit body 1 rotates counterclockwise, the left side of the side surface 18 is the cutting surface, and the outer edge of the drill bit body 1 has arc surfaces 19 located on both sides of the side surfaces 18 and mating surfaces 20 arranged at an angle. The mating surfaces 20 specifically consist of two surfaces, which are attached... Figure 2 The angle formed in the state shown is 90°;

[0037] The arc surface 19 and one of the side surfaces 18 are connected to the front end face of the drill body 1 by a first tooth surface 8. Specifically, the first tooth surface 8 is the transition surface between the arc surface 19 and the front end face of the drill body 1, and between the side surface 18 on the cutting side and the front end face of the drill body 1. A first alloy 9 is provided on the first tooth surface 8 and the front end face of the drill body 1. A second tooth surface 13 is provided on the side surface of the eccentric reamer 2 and the front end face of the eccentric reamer 2 at the same position as the first tooth surface 8. A second alloy 14 is provided on the second tooth surface 13. Specifically, the first alloy 9 and the second alloy 14 are both cutting teeth in the working process of the drill bit, used for rock breaking and cutting. The specific difference is that they are set in different positions.

[0038] As a preferred mode of the above embodiment, the drill bit body 1 is provided with a sliding channel 6, and the eccentric reamer 2 slides along the sliding channel 6 on the drill bit body 1. Specifically, the sliding channel 6 is provided with a "T"-shaped sliding groove, and the part of the eccentric reamer 2 extending into the sliding channel 6 is also "T"-shaped, and the two are matched with each other. A notch 22 is arranged at the middle position of the sliding channel 6 close to the drill bit body 1, which facilitates the installation of the eccentric reamer 2 into the sliding channel 6. A ball groove 5 is arranged in the sliding channel 6, and the ball groove 5 is provided with a ball 4 facilitating the sliding of the eccentric reamer 2. The ball 4 is equivalent to a rolling bearing, which can avoid being stuck with rock powder during the movement of the eccentric reamer 2.

[0039] As a preferred mode of the above embodiment, the eccentric reamer 2 is provided with a pin hole 17, and the pin hole 17 is provided with a locking pin 3 facilitating the contact and clamping with the ball 4, so as to fix the position of the eccentric reamer 2. When it is necessary to fix the eccentric reamer 2 at a stable position on the drill bit body 1, the locking pin 3 is inserted into the pin hole 17 to be fastened, so that the eccentric reamer 2 and the drill bit body 1 are clamped with each other. As shown in the figure, a structure for quickly inserting and locking the locking pin 3 and the pin hole 17 is provided, which is a rotating lock, and can also be directly inserted by interference connection. Figure 4

[0040] As a preferred mode of the above embodiment, a plurality of air holes 7 are arranged in the drill bit body 1. Specifically, the air holes 7 are in communication with the main air duct in the drill bit body 1. During the drilling operation, air is filled in the main air duct, and the gas is discharged outward through the air holes 7. One of the air holes 7 is in communication with the sliding channel 6. The gas discharged from the air hole 7 will blow in the sliding channel 6, so as to blow away the rock powder in the sliding channel 6, avoiding that the eccentric reamer 2 cannot move after being clamped tightly. The front end surface of the drill bit body 1 is provided with a slag discharge groove 10 in communication with the slag discharge hole 11. The slag discharge groove 10 is used for chip removal, that is, when the drilling operation is performed, the cut stone chips are collected in the slag discharge groove 10, and can be quickly blown outward by the gas blown out of the air hole 7.

[0041] As a preferred mode of the above embodiment, the eccentric reamer 2 is further provided with a third tooth surface 15, and the side surface of the eccentric reamer 2 and the third tooth surface 15 are further provided with a protection tooth 16. Specifically, reference can be made to the figure. Figure 3 The third tooth surface 15 and the protection tooth 16 mainly play a protection role for the eccentric reamer 2.

[0042] The drill bit body 1 is provided with a spline 12 facilitating the connection and installation. The spline 12 is mainly used for installation on the impact hammer 21 for cooperation.

[0043] As shown in the figure, Figures 5-6 ​As shown, the present application also provides another drill tool, i.e. a combined drill tool, comprising a plurality of the aforementioned cluster DTH drills and a percussion hammer 21, the combined drill tool is to combine the aforementioned cluster DTH drills together for use to provide a larger drilling diameter, wherein the cluster DTH drills are arranged on the percussion hammer 21, and the mating surfaces 20 on the drill bit bodies 1 of different cluster DTH drills are mutually abutted, such as Figure 5 As shown, four cluster DTH drills are combined together to form a drill bit with a larger drilling diameter.

[0044] As a preferred mode of the above embodiment, the angle of the mating surface 20 is 360° / n, wherein n is the number of arranged cluster DTH drills, and n>1, and the angle of the mating surface 20 is shown in the attached drawings. Figure 5 As shown in the attached drawings, the angle of the mating surface 20 is set to 90°, i.e. the 1-1, 1-2, 1-3, 1-4 four cluster DTH drills are arranged, and similarly, three, five, six, etc. cluster DTH drills can be arranged, and the number of cluster DTH drills can be changed according to actual needs, and the angle of the mating surface 20 needs to be ensured to be mutually abutted to maintain the stability between different cluster DTH drills, so as to set the angle of the mating surface 20 according to more actual needs.

[0045] As a preferred mode of the above embodiment, when the number of cluster DTH drills is one, the angle of the mating surface 20 is less than 180°, which is set to prevent the mating surface 20 from being a plane, but two planes, so as to provide partial cutting or material discharge during drilling when one cluster DTH drill is used for drilling.

[0046] It should be noted that in this document, the terms including, containing or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or includes elements inherent to such process, method, article or device. The specific examples are applied in this document to describe the principles and implementation modes of the technical solutions of the present application, and the above example descriptions are only used to help understand the method of the present application and its core idea. The above description is only a preferred embodiment of the present application, and it should be pointed out that due to the limitation of language expression, there are infinite specific structures, and for ordinary skilled persons in the technical field, some improvements, decorations or changes can be made without departing from the principles of the present application, and the above technical features can be combined in an appropriate manner; these improvements, decorations, changes or combinations, or the application of the inventive concept and technical solutions to other fields without improvement, shall be regarded as the protection scope of the present application.

Claims

1. A cluster down-the-hole drill characterized by, The drill bit body (1) has an eccentric reamer (2) movably arranged thereon; The drill bit body (1) has two lateral faces (18) arranged in parallel with each other, and the outer edge of the drill bit body (1) has an arc face (19) located at the two side edges of the two lateral faces (18) and an angle arranged matching face (20); The arc face (19) and one of the lateral faces (18) are connected with the front end face of the drill bit body (1) through a first tooth surface (8), and the first tooth surface (8) and the front end face of the drill bit body (1) are provided with a first alloy (9); The lateral face of the eccentric reamer (2) and the front end face of the eccentric reamer (2) are provided with a second tooth surface (13) at the same position as the first tooth surface (8), and the second tooth surface (13) is provided with a second alloy (14).

2. A cluster DTH as claimed in claim 1, wherein, The drill bit body (1) is provided with a sliding groove (6), and the eccentric reamer (2) slides on the drill bit body (1) along the sliding groove (6); The sliding groove (6) is provided with a ball groove (5), and the ball groove (5) is provided with a ball (4) facilitating the sliding of the eccentric reamer (2).

3. A cluster DTH as claimed in claim 2, wherein, The eccentric reamer (2) is provided with a pin hole (17), and the pin hole (17) is provided with a locking pin (3) facilitating the contact and clamping of the ball (4) to fix the position of the eccentric reamer (2).

4. A cluster DTH as claimed in claim 2, wherein, The drill bit body (1) is provided with a plurality of air holes (7), and one of the air holes (7) is in communication with the sliding groove (6); The front end face of the drill bit body (1) is provided with a slag discharge groove (10) in communication with a slag discharge hole (11).

5. The cluster DTH of claim 1 wherein, The eccentric reamer (2) is further provided with a third tooth surface (15), and the lateral face of the eccentric reamer (2) and the third tooth surface (15) are further provided with a protection tooth (16); The drill bit body (1) is provided with a spline (12) facilitating connection and installation.

6. A combination drill, characterized by The application further discloses a set of cluster roof bolters and an impact hammer (21), wherein the set of cluster roof bolters are arranged on the impact hammer (21), and the matching faces (20) on the drill bit bodies (1) of different cluster roof bolters are in close contact with each other.

7. A combination drill according to claim 6 wherein, The angle of the matching faces (20) is 360° / n, wherein n is the number of the arranged cluster roof bolters, and n>1.

8. A combination drill according to claim 6 wherein, When the number of the cluster roof bolters is 1, the angle of the matching face (20) is less than 180°.

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