Fan-shaped ball tooth drill bit with main nozzle and auxiliary nozzle

Abstract

The utility model discloses a fan-shaped ball tooth drill bit with a main nozzle and an auxiliary nozzle, which comprises a drill bit body and a matrix, the drill bit body is fixedly connected with the matrix, the diameter of the matrix is larger than that of the drill bit body, the side wall of the matrix is provided with the main nozzle and the auxiliary nozzle, and the auxiliary nozzle is formed by integrally connecting three sections of curved surfaces. Through the design, the three sections of curved surfaces of the auxiliary water gap increase the flowing area of cooling liquid when the cooling liquid passes through the auxiliary water gap, and compared with most right-angle auxiliary water gaps, the auxiliary water gap structure has the advantages that the resistance to the flowing cooling liquid is smaller, the flowing speed of the cooling liquid is slightly high, and the flow of the cooling liquid passing through the auxiliary water gap in unit time is increased; and the heat dissipation effect of the drill bit is enhanced.

Description

Technical Field

[0001] The utility model belongs to the field of drilling equipment, in particular to a main and auxiliary water inlet fan-shaped ball tooth drill bit. Background Art

[0002] The drill bit of drilling equipment is the core component of the equipment. It will generate a lot of heat due to friction when working. If there is no efficient cooling method, excessive accumulation of heat will damage the drill bit and reduce the service life of the drill bit. Therefore, most drill bits will use coolant to cool the drill bit when working. In order to improve the working efficiency of the drill bit, it is necessary to increase the cooling efficiency of the coolant. However, as a cooling medium, there is no effective way to enhance the heat exchange efficiency of the coolant. Therefore, it is necessary to provide a fan-shaped ball tooth drill bit with a main and secondary water inlet structure that optimizes the heat exchange efficiency of the coolant and the drill bit. Utility Model Content

[0003] The utility model aims to provide a main and secondary water inlet fan-shaped ball tooth drill bit to solve the problem that the drill bit, as the core component of the equipment, will generate a large amount of heat due to friction when working. If there is no efficient cooling means, excessive accumulation of heat will damage the drill bit and reduce the service life of the drill bit. Therefore, most drill bits will use coolant to cool the drill bit when working. In order to enhance the working efficiency of the drill bit, it is necessary to increase the cooling efficiency of the coolant.

[0004] To achieve the above purpose, the specific technical solution of the utility model is as follows:

[0005] A fan-shaped ball-tooth drill bit with a main and secondary water inlet comprises a drill body and a matrix, wherein the drill body is fixedly connected to the matrix, the diameter of the matrix is ​​larger than the drill body, the side wall of the matrix is ​​provided with a main water inlet and a secondary water inlet, and the secondary water inlet is formed by three sections of curved surfaces connected in one piece. Through such a design, the three sections of the curved surface of the secondary water inlet first increase the area through which the coolant flows when passing through the secondary water inlet, and second, compared with most right-angled secondary water inlets, the secondary water inlet structure disclosed in the present invention has less resistance to the coolant flowing through, the coolant flows faster, the coolant flow rate passing through the secondary water inlet per unit time increases, and the heat dissipation effect of the drill bit is enhanced.

[0006] Furthermore, the main water inlets are provided with a plurality of main water inlets, which penetrate the carcass in the radial direction of the carcass, and the main water inlets evenly divide the carcass into a plurality of fan-shaped working blocks. With such a design, when the coolant flows through the main water inlets, the heat generated by the friction of the carcass is carried out from the inside to the outside, thereby enhancing the heat dissipation effect.

[0007] Furthermore, the secondary water inlet is arranged on the outer surface of the fan-shaped working block on the side away from the carcass, and the depth of the secondary water inlet is 30%-80% of the carcass wall thickness. With such a design, the secondary water inlet depth is preferably 30%-80%, which increases the flow area of ​​the coolant without affecting the strength of the carcass.

[0008] Furthermore, the secondary water inlet includes a liquid inlet curved surface, a range-increasing curved surface and a liquid outlet curved surface in the clockwise direction of the carcass, a liquid guide plane is provided between the liquid inlet curved surface and the range-increasing curved surface, and a liquid guide plane is provided between the range-increasing curved surface and the liquid outlet curved surface, and the two liquid guide planes are arranged at an acute angle. With such a design, when the drill bit is running, extrusion is formed between the carcass and the drilled material, and when the carcass rotates, the coolant flows more smoothly when entering the secondary water inlet from the liquid inlet curved surface, the range-increasing curved surface goes deep into the carcass, increasing the flow distance of the coolant, and the liquid outlet curved surface increases the smoothness of the coolant when it flows out.

[0009] Furthermore, the top of the carcass is densely covered with ball teeth. Through such a design, the ball teeth have excellent wear resistance and impact toughness, and have a higher drilling speed than similar products. The ball teeth have a long service life, which is conducive to saving auxiliary man-hours, reducing the physical labor of workers and speeding up the project. The protrusion of the ball teeth also increases the contact area between the coolant and the top of the carcass.

[0010] Furthermore, a transition portion is provided between the drill body and the matrix, and the transition portion is integrally formed with the matrix. Through such a design, the connection strength between the matrix and the drill body is enhanced.

[0011] Furthermore, a main water channel is arranged at the position where the outer wall of the transition part is aligned with the main water inlet. Through such a design, the cooling liquid is prevented from accumulating at the tire body, thereby reducing the cooling efficiency.

[0012] Furthermore, an auxiliary water channel is provided at the position where the outer wall of the transition part is aligned with the auxiliary water inlet. This design prevents the coolant from accumulating in the tire body and reducing the cooling efficiency.

[0013] Furthermore, the outer wall and the inner wall of the transition part are embedded with polycrystals. With such a design, when the drill bit rotates and drills underground, the matrix will wear out, and the polycrystals will be worn out first, and the polycrystals will protect the matrix and extend the service life of the matrix.

[0014] The beneficial effects of the utility model are as follows: the three-section curved surface of the auxiliary water outlet first increases the area through which the coolant flows when passing through the auxiliary water outlet; second, compared with most right-angle auxiliary water outlets, the auxiliary water outlet structure disclosed in the present invention has less resistance to the coolant flowing through, the coolant flows slightly faster, the coolant flow rate passing through the auxiliary water outlet per unit time increases, and the heat dissipation effect of the drill bit is enhanced. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 It is a side view of the overall structure of the utility model;

[0017] Figure 3 A top view of the carcass of the utility model;

[0018] Figure 4 This is a schematic diagram of the carcass structure of the utility model;

[0019] Figure 5 for Figure 4 Part B is an enlarged schematic diagram of the structure;

[0020] Figure 6 This is a schematic diagram of the planed surface structure at the main water inlet of the utility model (the arrow indicates the flow direction of the coolant);

[0021] Figure 7 It is a schematic diagram of the coolant flow direction of the utility model (the arrow indicates the coolant flow direction);

[0022] Figure 8 for Figure 7 A schematic diagram of the enlarged structure of part A;

[0023] Explanation of the markings in the figure: 1. Drill bit body; 2. Carcass; 3. Main water inlet; 4. Auxiliary water inlet; 5. Fan-shaped working block; 6. Liquid inlet curved surface; 7. Range-increasing curved surface; 8. Liquid outlet curved surface; 9. Liquid guide plane; 10. Ball tooth; 11. Transition part; 12. Main water trough; 13. Auxiliary water trough; 14. Polycrystalline. DETAILED DESCRIPTION

[0024] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure. Instead, they are merely examples of devices and methods consistent with some aspects of the present disclosure as detailed in the appended claims.

[0025] When the type of coolant remains unchanged, the heat dissipation effect of the drill bit is mainly related to two factors: 1. The area through which the coolant flows. The larger the contact area between the coolant and the drill bit, the larger the effective heat exchange area and the faster the heat exchange rate. 2. The speed at which the coolant flows. The longer the same coolant stays at the drill bit, the more heat it absorbs, the higher its own temperature and the lower the heat dissipation efficiency. Therefore, the faster the coolant flows, the lower the temperature of the coolant itself and the better the heat dissipation effect.

[0026] like Figures 1 to 8 shown.

[0027] Example 1

[0028] A fan-shaped ball-tooth drill bit with main and secondary water inlets comprises a drill body 1 and a matrix 2. The drill body 1 is fixedly connected to the matrix 2. The diameter of the matrix 2 is larger than that of the drill body 1. The side wall of the matrix 2 is provided with a main water inlet 3 and a secondary water inlet 4. The secondary water inlet 4 is formed by three sections of curved surfaces connected as one body.

[0029] There are multiple main water inlets 3 , and the main water inlets 3 penetrate the carcass 2 in a radial direction. The main water inlets 3 evenly divide the carcass 2 into multiple sector-shaped working blocks 5 .

[0030] The secondary water inlet 4 is arranged on the outer surface of the sector-shaped working block 5 on the side away from the carcass 2 , and the depth of the secondary water inlet 4 is 30%-80% of the wall thickness of the carcass 2 .

[0031] The secondary water inlet 4 includes a liquid inlet curved surface 6, a range-increasing curved surface 7 and a liquid outlet curved surface 8 in the clockwise direction of the carcass 2. The diameters of the osculating circles of the liquid inlet curved surface 6, the range-increasing curved surface 7 and the liquid outlet curved surface 8 are equal. A liquid guide plane 9 is provided between the liquid inlet curved surface 6 and the range-increasing curved surface 7. A liquid guide plane 9 is provided between the range-increasing curved surface 7 and the liquid outlet curved surface 8. The two liquid guide planes 9 are arranged at an acute angle.

[0032] The top of the carcass 2 is densely covered with button teeth 10 .

[0033] The specific operating principle of Example 1 is as follows: when the drill bit is working, the carcass 2 faces downward, the coolant enters from the inside of the drill body 1 and flows into the carcass 2, and further the coolant flows out from the main water inlet 3 to the outer surface of the carcass 2. Part of the coolant is thrown out due to the high-speed rotation of the drill bit, and part of the coolant flows into the secondary water inlet 4 to cool the carcass 2. Due to the curved surface design of the secondary water inlet 4, the area through which the coolant flows in the secondary water inlet 4 is increased and the curved surface has less interference with the flow of the coolant, thereby enhancing the heat dissipation effect of the drill bit.

[0034] Example 2

[0035] A transition portion 11 is further provided between the drill body 1 and the matrix 2 , and the transition portion 11 is integrally formed with the matrix 2 .

[0036] A main water trough 12 is provided at a position where the outer wall of the transition portion 11 is aligned with the main water inlet 3 .

[0037] An auxiliary water trough 13 is provided at a position where the outer wall of the transition portion 11 is aligned with the auxiliary water inlet 4 .

[0038] Polycrystalline 14 are embedded in the outer wall and the inner wall of the transition portion 11 .

[0039] The implementation method of embodiment 2 is as follows:

[0040] When the coolant flows out from the inside of the carcass 2 through the main water inlet 3, the coolant cannot flow smoothly due to the contact between the carcass 2 and the object being drilled. However, due to the setting of the main water trough 12, the coolant can flow out from the main water trough 12, preventing the coolant in the front part from not being able to flow out smoothly and affecting the flow of the coolant in the rear part.

[0041] The function of the auxiliary water channel 13 is the same as that of the main water channel 12, which is to prevent the cooling liquid in the auxiliary water port 4 from failing to flow in time, thereby reducing the cooling efficiency.

[0042] The working principle of the polycrystal 14 is as follows: the polycrystal 14 is embedded in the matrix 2. When the matrix 2 is worn and thinned due to friction, the polycrystal 14 will slightly protrude from the outer surface of the matrix 2. At this time, the object to be drilled will first contact the polycrystal 14. Since the polycrystal 14 is a high-strength material such as artificial diamond, the polycrystal 14 can replace the matrix 2 and be rubbed by the object to be drilled, thereby increasing the service life of the matrix 2.

[0043] It is understood that the present invention is described by some embodiments, and those skilled in the art are aware that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the teachings of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the scope of protection of the present invention.

Claims

1. A fan-shaped ball-tooth drill bit for main and auxiliary water inlets, characterized in that: The drill bit body (1) and the carcass (2) are fixedly connected to each other, the carcass (2) having a diameter larger than that of the drill bit body (1), and the side wall of the carcass (2) is provided with a main water inlet (3) and a secondary water inlet (4), wherein the secondary water inlet (4) is formed by three sections of curved surfaces connected in one piece.

2. The main and auxiliary water inlet sector-shaped ball tooth drill bit according to claim 1, characterized in that: A plurality of main water inlets (3) are provided, and the main water inlets (3) penetrate the carcass (2) in a radial direction of the carcass (2). The main water inlets (3) evenly divide the carcass (2) into a plurality of sector-shaped working blocks (5).

3. The main and auxiliary water inlet sector-shaped ball-tooth drill bit according to claim 2, characterized in that: The auxiliary water inlet (4) is arranged on the outer surface of the fan-shaped working block (5) on the side away from the carcass (2), and the depth of the auxiliary water inlet (4) is 30%-80% of the wall thickness of the carcass (2).

4. The main and auxiliary water inlet sector-shaped ball-tooth drill bit according to claim 3, characterized in that: The secondary water inlet (4) comprises a liquid inlet curved surface (6), a range-increasing curved surface (7) and a liquid outlet curved surface (8) along the carcass (2) in a clockwise direction. The diameters of the osculating circles of the liquid inlet curved surface (6), the range-increasing curved surface (7) and the liquid outlet curved surface (8) are equal. A liquid guide plane (9) is provided between the liquid inlet curved surface (6) and the range-increasing curved surface (7). A liquid guide plane (9) is provided between the range-increasing curved surface (7) and the liquid outlet curved surface (8). The two liquid guide planes (9) are arranged at an acute angle.

5. The main and auxiliary water inlet sector-shaped ball-tooth drill bit according to claim 1, characterized in that: The top of the carcass (2) is densely covered with ball teeth (10).

6. The main and auxiliary water inlet sector-shaped ball-tooth drill bit according to claim 1, characterized in that: A transition portion (11) is further provided between the drill bit body (1) and the carcass (2), and the transition portion (11) and the carcass (2) are integrally formed.

7. The main and auxiliary water inlet sector-shaped ball-tooth drill bit according to claim 6, characterized in that: A main water trough (12) is provided at a position where the outer wall of the transition portion (11) is aligned with the main water inlet (3).

8. The main and auxiliary water inlet sector-shaped ball-tooth drill bit according to claim 6, characterized in that: An auxiliary water trough (13) is provided at a position where the outer wall of the transition portion (11) is aligned with the auxiliary water inlet (4).

9. The main and auxiliary water inlet sector-shaped ball-tooth drill bit according to claim 6, characterized in that: Polycrystalline (14) are embedded in the outer wall and the inner wall of the transition portion (11).

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