Hard alloy ball tooth with spiral cooling flow channel

Abstract

The utility model belongs to the technical field of ball tooth drill bits, and particularly relates to a hard alloy ball tooth with a spiral cooling runner, which comprises a ball tooth body, and a cooling component is arranged in the ball tooth body. The cooling assembly comprises a liquid inlet hole. According to the utility model, the cooling effect is greatly improved by arranging the spiral flow channel and the convex block. Due to the design of the spiral flow channel, the flow path of a cooling medium in the ball tooth body is obviously prolonged, the contact area and the contact time of the cooling medium and the ball tooth body are increased, and heat generated by the ball tooth during rock drilling operation can be taken away more sufficiently. And the lugs are uniformly distributed on the inner wall of the spiral flow channel, so that the laminar flow state of the cooling medium is destroyed, turbulent flow is formed, and the heat exchange efficiency is further enhanced. Therefore, the working temperature of the ball tooth is effectively controlled, the reduction speed of hardness and wear resistance of the hard alloy caused by high temperature is slowed down, the service life of the ball tooth is greatly prolonged, and high cost caused by frequent replacement of the ball tooth is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of ball tooth drill bit, concretely is a hard alloy ball tooth with spiral cooling runner. BACKGROUND

[0002] In the field of modern mining, tunnel excavation and geological exploration, rock drilling is a very key basic work, and the performance of hard alloy ball tooth as the core component of rock drilling equipment is directly related to the operation efficiency and cost.

[0003] The prior art has the following defects or problems: in the prior art, the traditional hard alloy ball tooth faces many problems in actual use. For example, during rock drilling, the ball tooth and the rock frequently and violently rub, generating a large amount of heat. However, the conventional ball tooth lacks an efficient cooling structure, causing heat to accumulate inside the ball tooth, resulting in a sharp rise in the working temperature of the ball tooth. The excessively high temperature not only significantly reduces the hardness and wear resistance of the hard alloy, greatly accelerates the wear of the ball tooth, increases the operation cost due to frequent replacement of the ball tooth, but also reduces the rock drilling efficiency and prolongs the project cycle.

[0004] It should be noted that the above content belongs to the technical cognition range of the inventor and does not necessarily constitute the prior art. CONTENT OF THE UTILITY MODEL

[0005] In view of the deficiencies of the prior art, the utility model provides a hard alloy ball tooth with a spiral cooling runner, which solves the existing problems.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a hard alloy ball tooth with a spiral cooling runner, comprising a ball tooth body, a cooling assembly is arranged inside the ball tooth body;

[0007] The cooling assembly comprises a liquid inlet hole, the liquid inlet hole is arranged on the bottom side mounting part of the ball tooth body, a spiral runner is formed in the inside of the ball tooth body, a plurality of uniformly distributed protrusions are arranged on the inner wall of the spiral runner, a buffer cavity is fixedly connected to the top of the ball tooth body, and a plurality of shunt holes are formed around the buffer cavity.

[0008] As a preferred technical scheme of the utility model, a threaded connection section is arranged in the middle of the bottom side of the ball tooth body, a drill base body is detachably mounted on the bottom of the ball tooth body, an installation groove is formed in the middle of the drill base body, and the threaded connection section is threadedly connected with the installation groove.

[0009] As a preferred technical scheme of the utility model, a sealing ring is sleeved on one end of the drill base body close to the ball tooth body, a locking nut is arranged on the side of the drill base body away from the sealing ring, and the locking nut is threadedly connected with the threaded connection section.

[0010] As a preferred technical scheme of the utility model, the top of the buffer cavity is fixedly connected with a tooth top.

[0011] As a preferred technical scheme of the utility model, the inside of the ball tooth body is fixedly connected with a plurality of uniformly distributed reinforcing ribs, and the reinforcing ribs are made of diamond material.

[0012] As a preferred technical scheme of the utility model, the tooth top is conical.

[0013] As a preferred technical scheme of the utility model, the ball tooth body is a trapezoidal cylinder with narrow top and wide bottom.

[0014] Compared with the prior art, the utility model provides a hard alloy ball tooth with spiral cooling flow channel, which has the following beneficial effects:

[0015] 1. The hard alloy ball tooth with spiral cooling flow channel greatly improves the cooling effect by setting spiral flow channel and protruding block. The design of spiral flow channel significantly prolongs the flow path of cooling medium inside the ball tooth body, increases the contact area and contact time of cooling medium and ball tooth body, and can more fully take away the heat generated by the ball tooth during rock drilling operation. The protruding block uniformly distributed on the inner wall of the spiral flow channel destroys the laminar flow state of the cooling medium, forms turbulence, and further enhances the heat exchange efficiency. This effectively controls the working temperature of the ball tooth, slows down the speed of hardness and wear resistance reduction of the hard alloy due to high temperature, thereby greatly prolonging the service life of the ball tooth and reducing the high cost caused by frequent replacement of the ball tooth.

[0016] 2. The hard alloy ball tooth with spiral cooling flow channel, the threaded connection section at the middle of the bottom side of the ball tooth body is screwed with the mounting groove of the drill base body, and cooperates with the sealing ring and the locking nut. This connection mode not only ensures the stability of the connection, but also has good sealing performance. The sealing ring prevents leakage of the cooling medium, ensuring normal operation of the cooling system; the locking nut further fastens the ball tooth body and the drill base body, preventing the ball tooth from loosening or falling off in the severe vibration of rock drilling operation, effectively avoiding safety accidents caused by the falling of the ball tooth, and protecting the life safety of the operating personnel and the smooth progress of the project. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a three-dimensional structure schematic view of the utility model;

[0018] Figure 2 It is a reinforcing rib structure schematic view of the utility model;

[0019] Figure 3 It is a tooth top structure schematic view of the utility model;

[0020] Figure 4 It is a sealing ring structure schematic view of the utility model.

[0021] In the figure: 1, the ball tooth body; 2, the tooth top; 3, the buffer cavity; 4, the shunt hole; 5, the reinforcing rib; 6, the drilling tool base body; 7, the locking nut; 8, the threaded connection section; 9, the liquid inlet hole; 10, the spiral flow channel; 11, the lug; 12, the sealing ring; 13, the installation groove. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.

[0023] Reference Figure 1 And Figure 3 In the embodiment, a hard alloy ball tooth with spiral cooling flow channel includes a ball tooth body 1, and a cooling assembly is arranged inside the ball tooth body 1.

[0024] The cooling assembly includes a liquid inlet hole 9 arranged at the bottom side mounting portion of the ball tooth body 1, a spiral flow channel 10 formed inside the ball tooth body 1, a plurality of lugs 11 uniformly distributed on the inner wall of the spiral flow channel 10, and a buffer cavity 3 fixedly connected to the top of the ball tooth body 1, and shunt holes 4 are formed around the buffer cavity 3.

[0025] Specifically, the external cooling medium supply device injects the cooling medium from the liquid inlet hole 9. The cooling medium enters the spiral flow channel 10 inside the ball tooth body 1. Due to the special design of the spiral flow channel 10, the cooling medium flows along the spiral track, greatly increasing the contact area and contact time with the ball tooth body 1, thereby more efficiently absorbing the heat generated by the ball tooth due to friction with the rock during rock drilling. At the same time, the lugs 11 uniformly distributed on the inner wall of the spiral flow channel 10 destroy the original laminar flow state of the cooling medium, forming turbulent flow, further enhancing the heat exchange efficiency and strengthening the cooling effect, effectively reducing the working temperature of the ball tooth. As the cooling medium flows in the spiral flow channel 10 to the top of the ball tooth body 1, it enters the buffer cavity 3. The buffer cavity 3 not only relieves part of the impact force received by the ball tooth during rock drilling, protecting the ball tooth structure, but also temporarily stores and buffers the cooling medium. Subsequently, the cooling medium is dispersed and flows out through the shunt holes 4 formed around the buffer cavity 3, cooling the tooth top 2, and also cooling and lubricating the rock around the ball tooth, reducing the frictional resistance of the rock to the ball tooth, and further improving the working performance of the ball tooth.

[0026] Reference Figure 2 AndFigure 4 In this embodiment, a threaded connection section 8 is arranged in the middle of the bottom side of the ball tooth body 1, and a drill base 6 is detachably mounted on the bottom of the ball tooth body 1. An installation groove 13 is arranged in the middle of the drill base 6, and the threaded connection section 8 is threadedly connected with the installation groove 13.

[0027] Specifically, the ball tooth is stably and sealingly mounted on the drill by threadedly connecting the installation groove 13 in the middle of the drill base 6 with the threaded connection section 8 in the middle of the bottom side of the ball tooth body 1, and by means of the sealing ring 12 sleeved on one end of the ball tooth body 1 close to the drill base 6 and the locking nut 7 arranged on the side of the drill base 6 away from the sealing ring 12.

[0028] With reference to Figure 1 , Figure 2 and Figure 4 In this embodiment, a sealing ring 12 is sleeved on one end of the drill base 6 close to the ball tooth body 1, and a locking nut 7 is arranged on the side of the drill base 6 away from the sealing ring 12. The locking nut 7 is threadedly connected with the threaded connection section 8. The top of the buffer cavity 3 is fixedly connected with the tooth top 2. A plurality of uniformly distributed reinforcing ribs 5 are fixedly connected inside the ball tooth body 1. The reinforcing ribs 5 are made of diamond material. The tooth top 2 is conical. The ball tooth body 1 is a trapezoidal cylinder with a narrow upper part and a wide lower part.

[0029] Specifically, the plurality of reinforcing ribs 5 made of diamond material fixedly connected inside the ball tooth body 1 play a key role in the entire operation process. Diamond has extremely high hardness and strength. These reinforcing ribs 5 can effectively share the impact force borne by the ball tooth, optimize the stress distribution inside the ball tooth, reduce stress concentration, enhance the overall strength and toughness of the ball tooth, and make the ball tooth not easy to be damaged under frequent impact and friction. The conical tooth top 2 design can concentrate the rock drilling force on a smaller contact area when in contact with the rock, increase the pressure per unit area, and improve the rock drilling efficiency. The trapezoidal cylindrical structure of the ball tooth body 1 with a narrow upper part and a wide lower part also helps to better disperse stress and enhance the stability of the ball tooth during operation.

[0030] The utility model discloses a working principle and use flow: through the installation groove 13 of the middle part of the drilling tool base body 6 and the screw thread connection section 8 of the bottom middle part of the ball tooth body 1 bottom side carry out the screw thread connection, and by the aid of the sealing ring 12 of the drilling tool base body 6 close to the ball tooth body 1 one end cover and the lock nut 7 of the sealing ring 12 one side setting, ball tooth is firmly and sealedly installed on the drilling tool. External cooling medium supply equipment injects cooling medium from the liquid inlet hole 9. Cooling medium enters the spiral flow channel 10 in the ball tooth body 1 interior, owing to the special design of spiral flow channel 10, cooling medium flows along spiral track, greatly increases the contact area and contact length with ball tooth body 1, thereby more efficiently absorbs the heat of ball tooth in the rock drilling process due to the friction with rock. Meanwhile, the bump 11 of the uniform distribution in the inner wall of spiral flow channel 10, make the laminar flow state of cooling medium be destroyed, form turbulence, further enhance the heat exchange efficiency, strengthen the cooling effect, effectively reduce the working temperature of ball tooth, along with cooling medium in spiral flow channel 10 flow to the top of ball tooth body 1, enter buffer cavity 3. Buffer cavity 3 not only can relieve the partial impact force that ball tooth receives when rock drilling, protect ball tooth structure, still can play the role of temporary storage and buffering to cooling medium. Subsequently, cooling medium disperses and flows out through the shunt hole 4 of the buffer cavity 3 all around, carries out cooling to the tooth top 2, can also play certain cooling and lubricating effect to the rock around ball tooth, reduces the friction resistance of rock to ball tooth, further improves the working performance of ball tooth. The multiple diamond material reinforcing ribs 5 of fixed connection in ball tooth body 1 interior play the key role in the whole operation process. Diamond has extremely high hardness and strength, these reinforcing ribs 5 can effectively share the impact force that ball tooth bears, optimize the stress distribution in ball tooth, reduce stress concentration phenomenon, enhance the overall strength and toughness of ball tooth, make ball tooth not easy to be damaged under the frequent impact and friction. The tooth top 2 design of conical shape can concentrate rock drilling force on smaller contact area when contacting with rock, increase the pressure of unit area, improve rock drilling efficiency. The trapezoidal cylindrical structure of ball tooth body 1 is narrow on the whole, which also helps to disperse stress and enhance the stability of ball tooth during operation.

[0031] Finally, it should be noted that: the above only for the preferred embodiment of the utility model, and does not limit the utility model, although the utility model has been described in detail with reference to the foregoing embodiments, for the person skilled in the art, it still can modify the technical scheme recorded in the foregoing each embodiment, or equivalent replacement to some technical features. Any modification, equivalent replacement, improvement etc. that is made within the spirit and principle of the utility model, should be included in the protection scope of the utility model.

Claims

1. A hard metal button with a spiral cooling channel, comprising a button body (1), characterized in that: The ball tooth body (1) is internally provided with a cooling assembly; The cooling assembly comprises a liquid inlet hole (9) arranged at the bottom side mounting portion of the ball tooth body (1), a spiral flow channel (10) is formed in the ball tooth body (1), a plurality of uniformly distributed protrusions (11) are arranged on the inner wall of the spiral flow channel (10), and a buffer cavity (3) is fixedly connected to the top of the ball tooth body (1), and a plurality of shunt holes (4) are formed around the buffer cavity (3).

2. A hard metal ball nose according to claim 1, characterized in that: A threaded connection section (8) is arranged at the middle of the bottom side of the ball tooth body (1), a drill base body (6) is detachably mounted at the bottom of the ball tooth body (1), an installation groove (13) is formed in the middle of the drill base body (6), and the threaded connection section (8) is threadedly connected with the installation groove (13).

3. A hard metal ball nose according to claim 2, characterised in that: A sealing ring (12) is sleeved on one end of the drill base body (6) close to the ball tooth body (1), a locking nut (7) is arranged on the side of the drill base body (6) away from the sealing ring (12), and the locking nut (7) is threadedly connected with the threaded connection section (8).

4. The cemented carbide ball nose insert with a helical cooling channel according to claim 1, characterized in that: The top of the buffer cavity (3) is fixedly connected with a tooth top (2).

5. The cemented carbide ball nose insert with a helical cooling channel according to claim 1, characterized in that: A plurality of uniformly distributed reinforcing ribs (5) are fixedly connected in the ball tooth body (1), and the reinforcing ribs (5) are made of diamond material.

6. The cemented carbide ball nose insert with a helical cooling channel according to claim 4, characterized in that: The tooth top (2) is in the shape of a cone.

7. The cemented carbide ball nose insert with a helical cooling channel according to claim 1, characterized in that: The ball tooth body (1) is in the shape of a trapezoidal cylinder with a narrow top and a wide bottom.

Images