Protective support of drilling bit for mining

Abstract

The utility model relates to the technical field of drilling protection equipment, and particularly discloses a protection support of a drilling bit for mining, which comprises a sleeve, a first arc-shaped surface and a second arc-shaped surface, the end covers are symmetrically and detachably connected to the two ends of the sleeve, second arc-shaped surfaces are arranged on the sides, close to the sleeve, of the end covers, the first arc-shaped surfaces and the second arc-shaped surfaces define annular grooves, and a plurality of balls are arranged in the annular grooves; according to the utility model, the friction and heat dissipation between the drill bit and the sleeve are reduced, the service lives of the drill bit and the sleeve are prolonged, the equipment cost in the mining process is reduced, and the mining efficiency is improved. And safety accidents caused by local overheating of the drill bit and the sleeve are effectively prevented, and therefore the problems that according to a traditional protection support, the sleeve is directly matched with the drill bit, abrasion of the surface of the sleeve and the surface of the drill bit is large, and the equipment maintenance and replacement cost is increased are solved.

Description

Technical Field

[0001] The present application relates to the technical field of drilling protection equipment, and specifically discloses a protection bracket for a drilling drill used in mining. Background Art

[0002] In the process of mine exploration and mining, drilling is one of the essential steps, and the drill bit is one of the essential equipment in the drilling process. Usually, the drill bit drills the mine surface under the drive of the drilling rig. In order to ensure the accuracy of the drill bit during the drilling process, it is usually necessary to configure a corresponding protective bracket to limit the position of the drill bit to avoid the drill bit from tilting during the drilling process.

[0003] The traditional protective bracket usually adopts a sleeve to directly cooperate with the drill bit to achieve the purpose of limiting the drilling direction of the drill bit. However, when the sleeve and the drill bit are directly cooperated, the contact area is large, and the drill bit is in a high-speed rotating state during the drilling process. The sleeve is relatively fixed to the bracket, that is, relatively fixed to the ground, that is, the drill bit rotates at a relatively high speed with the sleeve during the drilling process. The large area of ​​contact will increase the friction between the drill bit and the sleeve, which will not only easily increase the wear on the surface of the sleeve and the drill bit, thereby increasing the cost of equipment maintenance and replacement, but also easily generate heat due to friction, which will easily aggravate the increase in the surface temperature of the drill bit and the sleeve, affecting the service life of the drill bit and the sleeve and even causing safety accidents. Therefore, in view of this, the inventor provides a protective bracket for a drilling drill bit for mining to solve the above problems. Utility Model Content

[0004] The utility model aims to solve the problem that the traditional protective bracket adopts a sleeve to directly cooperate with the drill bit, resulting in greater wear on the sleeve and the drill bit surface, thereby increasing the cost of equipment maintenance and replacement during mining.

[0005] In order to achieve the above-mentioned purpose, the basic scheme of the utility model provides a protective support for a drilling drill bit for mining, comprising:

[0006] A sleeve, with first arc-shaped surfaces symmetrically arranged at both ends of the sleeve;

[0007] The end cap is symmetrically and detachably connected to the two ends of the sleeve, and a second arc surface is provided on a side of the end cap close to the sleeve. The first arc surface and the second arc surface are combined to form an annular groove, and a plurality of balls are provided in the annular groove;

[0008] The fixing frame is symmetrically arranged on the side wall of the sleeve, and the bottom of the fixing frame is provided with rivets which can be fixed to the mine ground.

[0009] The principles and effects of this basic solution are:

[0010] Compared with the prior art, the utility model forms an annular groove for accommodating the installation of balls by cooperating with each other through the first arcuate surface on the sleeve and the second arcuate surface on the end cover, so that during the drilling process of the drill bit, the balls in the annular groove are in contact with the drill bit to form a point-to-surface contact form, which effectively reduces the contact area between the protective bracket and the drill bit, that is, while ensuring that the drilling position of the drill bit is limited, it also reduces the friction and heat dissipation between the drill bit and the sleeve, increases the service life of the drill bit and the sleeve, reduces the equipment cost in the mining process, and effectively prevents the occurrence of safety accidents caused by local overheating of the drill bit and the sleeve, thereby solving the problem that the traditional protective bracket adopts the sleeve to directly cooperate with the drill bit, resulting in greater wear on the surface of the sleeve and the drill bit, thereby increasing the cost of equipment maintenance and replacement.

[0011] Furthermore, the inner wall of the sleeve is provided with an interlayer, and the side wall of the sleeve is symmetrically provided with a water inlet pipe and a water outlet pipe connected to the interlayer. By providing the interlayer, the water inlet pipe and the water outlet pipe, the sleeve can be effectively cooled, thereby cooling the ball, further improving the heat dissipation at the contact position between the ball and the drill bit, thereby further improving the service life of the ball and the drill bit.

[0012] Furthermore, a partition is provided in the interlayer, and the partition divides the interlayer into a spiral water channel, and the water inlet pipe and the water outlet pipe are respectively connected to the two ends of the water channel. Through this arrangement, the path of the cooling liquid flowing in the interlayer can be extended, thereby cooling the inner wall of the sleeve, thereby driving the heat in the cavity formed between the inner wall of the sleeve and the drill bit, further improving the heat dissipation effect on the drill bit, thereby increasing the service life of the drill bit.

[0013] Furthermore, the sleeve includes an inner cylinder and an outer cylinder, one end of the partition is fixed to the outer wall of the inner cylinder, and the other end of the partition is provided with a sealing strip that fits the inner wall of the outer cylinder. This arrangement ensures the sealing performance of the partition while also ensuring that the overall structure of the sleeve is easy to produce and process.

[0014] Furthermore, the side wall of the sleeve end is provided with a first connecting ring, the side wall of the end cover is provided with a second connecting ring, and a plurality of fixing bolts are provided between the first connecting ring and the second connecting ring. The first connecting ring, the second connecting ring and the plurality of fixing bolts are provided to facilitate the fixing and disassembly of the sleeve and the end cover.

[0015] Furthermore, the angle between the two ends of the cross-sectional opening of the annular groove and the center of the opening is less than 180°. This arrangement can effectively prevent the ball from falling out of the annular groove.

[0016] Furthermore, the fixing frame includes a fixing plate fixedly connected to the outer wall of the sleeve, a connecting rod symmetrically arranged on the fixing plate, and a connecting seat arranged at the end of the connecting rod, and the rivet is arranged on the connecting seat. Through this arrangement, the sleeve and the ground can be fixed to each other. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 A schematic diagram of a protective support for a drilling drill bit for mining provided in an embodiment of the present application is shown;

[0019] Figure 2 A cross-sectional view of a protective bracket for a drilling drill bit for mining proposed in an embodiment of the present application is shown. DETAILED DESCRIPTION

[0020] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined purpose of the utility model, the specific implementation method, structure, characteristics and effects of the present invention are described in detail below in combination with the accompanying drawings and preferred embodiments.

[0021] The figure marks in the drawings of the specification include: sleeve 1, inner cylinder 101, outer cylinder 102, partition 103, first arc surface 104, first connecting ring 105, second arc surface 201, second connecting ring 202, end cover 2, ball 3, fixing bolt 4, connecting rod 5, rivet 6, water inlet pipe 7, and water outlet pipe 8.

[0022] A protective support for a drilling drill bit for mining, for example Figure 1 and Figure 2 As shown: It includes a sleeve 1, an end cover 2 and a fixing frame, etc., as follows:

[0023] The sleeve 1 includes an inner cylinder 101 and an outer cylinder 102, and a sandwich is formed between the inner cylinder 101 and the outer cylinder 102. A partition 103 is provided in the sandwich, and the partition 103 divides the sandwich into a spiral water channel. One end of the partition 103 is fixed to the outer wall of the inner cylinder 101 by an integral molding method, and the other end of the partition 103 is provided with a sealing strip that fits the inner wall of the outer cylinder 102. During the production process of the sleeve 1, turning is performed along the surface of the cylindrical raw material to form a spiral water channel. While ensuring the sealing performance of the partition 103, it also ensures that the overall structure of the sleeve 1 is convenient for production and processing. The bottom and top of the water channel are respectively connected to the water inlet pipe 7 and the water outlet pipe 8. The inner walls at both ends of the sleeve 1 are symmetrically provided with first arc surfaces 104, and the outer walls at both ends of the sleeve 1 are symmetrically provided with first connecting rings 105. The ends of the outer cylinder 102 are respectively welded and fixed to the connecting rings on both sides.

[0024] The end cover 2 is symmetrically and detachably connected to the two ends of the sleeve 1, and a second connecting ring 202 adapted to the first connecting ring 105 is arranged at the end of the outer wall of the end cover 2. A plurality of mounting holes are evenly arranged in the circumferential direction at corresponding positions of the first connecting ring 105 and the second connecting ring 202. The mounting holes are respectively provided with fixing bolts 4 and are fixed by nuts and washers to facilitate the mutual fixation and disassembly of the sleeve 1 and the end cover 2. A second curved surface 201 adapted to the first curved surface 104 is arranged on the inner wall of the end cover 2 close to the sleeve 1. The first curved surface 104 and the second curved surface 201 are enclosed to form an annular groove, and a plurality of balls 3 are arranged in the annular groove. The angle between the two ends of the opening of the cross section of the annular groove and the center of the opening is less than 180° to prevent the balls 3 from falling out of the annular groove.

[0025] The fixing frame includes a fixing plate fixed to the outer wall of the outer cylinder 102 by welding, a connecting rod 5 symmetrically arranged on the fixing plate and a connecting seat arranged at the end of the connecting rod 5, and the connecting seat is provided with a rivet 6 that can be fixed to the mine ground. The connection between the connecting rod 5 and the fixing plate and the connecting seat is hingedly connected and locked by a locking bolt so that the angle of the connecting rod 5 can be adjusted during the installation process. At the same time, the fixing plate, the connecting rod 5 and the connecting seat form a stable structure during use.

[0026] During the implementation of this embodiment, the balls 3 are first placed in the first arc surface 104 respectively, and then the end cover 2 is covered, and the end cover 2 and the sleeve 1 are fixed to each other by a plurality of fixing bolts 4, so that the balls 3 are confined in the annular groove formed by the first arc surface 104 and the second arc surface 201, and then the angle of the connecting rod 5 is adjusted according to the mine ground environment to adjust the fixing position of each rivet 6 and the mine ground. After the adjustment is completed, the top and bottom of the connecting rod 5 are locked by the locking bolts respectively, and then the drill bit can be passed through the sleeve 1 to drill holes. During the drilling process of the drill bit, a water pump is used to supply coolant to the water inlet pipe 7, and the coolant circulates along the water channel to cool the inner wall of the sleeve 1 and the balls 3 in contact with the sleeve 1. At the same time, the cavity environment formed between the inner wall of the sleeve 1 and the outer wall of the drill bit is cooled, thereby improving the cooling effect on the drill bit. Since the surface of the drill bit is only in contact with the ball 3, a point-to-surface contact form is formed, which effectively reduces the contact area between the protective bracket and the drill bit. That is, while ensuring that the drilling position of the drill bit is limited, the friction and heat dissipation between the drill bit and the sleeve 1 are reduced, the service life of the drill bit and the sleeve 1 is increased, the equipment cost in the mining process is reduced, and the occurrence of safety accidents caused by local overheating of the drill bit and the sleeve 1 is effectively prevented, thereby solving the problem that the traditional protective bracket adopts the sleeve 1 to directly cooperate with the drill bit, resulting in greater wear on the surface of the sleeve 1 and the drill bit, thereby increasing the cost of equipment maintenance and replacement.

[0027] The above description is only a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A protective support for a drilling drill bit for mining, characterized in that: include: A sleeve, with first arc-shaped surfaces symmetrically arranged at both ends of the sleeve; The end cap is symmetrically and detachably connected to the two ends of the sleeve, and a second arc surface is provided on a side of the end cap close to the sleeve. The first arc surface and the second arc surface are combined to form an annular groove, and a plurality of balls are provided in the annular groove; The fixing frame is symmetrically arranged on the side wall of the sleeve, and the bottom of the fixing frame is provided with rivets which can be fixed to the mine ground.

2. A protective support for a drilling drill bit for mining according to claim 1, characterized in that: The inner wall of the sleeve is provided with an interlayer, and the side wall of the sleeve is symmetrically provided with a water inlet pipe and a water outlet pipe connected with the interlayer.

3. A protective support for a drilling drill bit for mining according to claim 2, characterized in that: A partition is arranged in the interlayer, and the partition divides the interlayer into a spiral water channel. The water inlet pipe and the water outlet pipe are respectively connected to the two ends of the water channel.

4. A protective support for a drilling drill bit for mining according to claim 3, characterized in that: The sleeve comprises an inner cylinder and an outer cylinder, one end of the partition is fixed to the outer wall of the inner cylinder, and the other end of the partition is provided with a sealing strip which is in contact with the inner wall of the outer cylinder.

5. The protective support for a drilling drill bit for mining according to claim 1, characterized in that: A first connecting ring is disposed on the side wall of the sleeve end, a second connecting ring is disposed on the side wall of the end cover, and a plurality of fixing bolts are disposed between the first connecting ring and the second connecting ring.

6. The protective support for a drilling drill bit for mining according to claim 1, characterized in that: The angles between the two ends of the cross-sectional opening of the annular groove and the center of the opening are less than 180°.

7. The protective support for a drilling drill bit for mining according to claim 1, characterized in that: The fixing frame comprises a fixing plate fixedly connected to the outer wall of the sleeve, a connecting rod symmetrically arranged on the fixing plate and a connecting seat arranged at the end of the connecting rod, and the rivet is arranged on the connecting seat.

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