A roller drill bit for hard cutting and bitting high-strength piles in confined spaces

Abstract

The invention discloses a roller drill bit for hard cutting and biting high-strength plain piles in a confined space, comprising a connecting thread column and a bearing, a reinforcing neck is arranged on the top of the connecting thread column, three tooth palms are arranged at equal distances on the top edge of the reinforcing neck, a roller is rotatably mounted on one end of the tooth palm close to the axis of the connecting thread column, a main rod is fixed in the middle of one end of the roller close to the tooth palm, a connecting seat is fixed on one end of the tooth palm close to the roller, the connecting seat and the main rod are rotatably connected through a bearing, a cylindrical cavity is provided on one side of the connecting seat close to the tooth palm, a sponge block is provided in the middle of the cylindrical cavity, an oil plate is provided on one side of the cylindrical cavity close to the bearing, a pressing plate is provided on one side of the cylindrical cavity close to the tooth palm, a screw is rotatably connected to the middle of one end of the pressing plate away from the sponge block, an oil inlet hole is provided at the axis of the screw, a sealing column is installed in the oil inlet hole. The invention has the advantages of high strength and smooth rotation.

Description

Technical Field

[0001] The invention relates to the technical field of roller drill bits, in particular to a roller drill bit used for hard cutting and biting high-strength raw piles in a confined space. Background Art

[0002] The roller bit is the most widely used drilling bit. When the roller bit is working, the cutting teeth contact the bottom of the well alternately, the rock breaking torque is small, the contact area between the cutting teeth and the bottom of the well is small, the specific pressure is high, and it is easy to penetrate the formation; the total length of the working edge is large, so the wear is relatively reduced. The roller bit can adapt to a variety of formations from soft to hard.

[0003] The existing roller drill bit oil filling device generally has no oil storage system due to its structure. The disadvantage is that the lubricating oil of the engineering roller drill bit is lost during operation and cannot be replenished in time, which affects the lubrication effect of the drill bit. Therefore, we propose a roller drill bit for hard cutting and biting high-strength piles in confined spaces. Summary of the invention

[0004] The purpose of the present invention is to provide a roller drill bit for hard cutting and biting high-strength piles in a confined space, which has the advantages of high strength and smooth rotation, and solves the problems raised in the background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a roller drill bit for hard cutting and biting high-strength raw piles in a confined space, comprising a connecting thread column and a bearing, a reinforcing neck is arranged at the top of the connecting thread column, three tooth palms are arranged at equal distances on the top edge of the reinforcing neck, a roller is rotatably mounted on one end of the tooth palm close to the axis of the connecting thread column, a main rod is fixed in the middle of one end of the roller close to the tooth palm, a connecting seat is fixed on one end of the tooth palm close to the roller, the connecting seat and the main rod are rotatably connected through the bearing, a cylindrical cavity is opened on one side of the connecting seat close to the tooth palm, a sponge block is arranged in the middle of the cylindrical cavity, an oil plate is arranged on one side of the cylindrical cavity close to the bearing, a pressure plate is arranged on one side of the cylindrical cavity close to the tooth palm, a screw is rotatably connected in the middle of one end of the pressure plate away from the sponge block, an oil inlet hole is opened at the axis of the screw, and a sealing column is installed in the oil inlet hole.

[0006] Preferably, a protective cover is fixed to one end of the gear wheel close to the tooth palm, and the bottom of the protective cover is bent inwardly and rotatably connected to the connecting seat.

[0007] Preferably, a threaded hole is provided on the tooth palm, the screw rod passes through the threaded hole and extends to the outside of the tooth palm, and is fixed with a fixing handle.

[0008] Preferably, one end of the oil inlet hole passes through the outer surface of the fixing handle, and the other end passes through the pressing plate.

[0009] Preferably, the oil-passing plate is evenly provided with oil-permeable holes, one end of the oil-passing plate is in contact with the sponge block, and the other end is in contact with the bearing.

[0010] Preferably, the outer wall of the cone is provided with inserts arranged in a ring shape, and the inserts are made of cemented carbide material.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] The present invention pours lubricating oil into the oil inlet hole, the lubricating oil is absorbed by the sponge block, and then the sealing column is inserted and installed into the oil inlet hole, so that the lubricating oil in the sponge block will not flow back into the oil inlet hole, and the fixing handle is rotated clockwise to make the screw rotate along the threaded hole toward the inside of the connecting seat, driving the pressure plate to squeeze the sponge block, so that the lubricating oil in the sponge block is squeezed out, and then the squeezed lubricating oil lubricates the bearing through the oil hole on the oil plate, so that the gear rotates smoothly and wear is reduced. The gear is made of high-strength and high-toughness cemented carbide material, which improves work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the structure of the roller drill bit of the present invention;

[0014] Figure 2 It is a schematic diagram of the connection structure between the cone and the cone palm of the present invention;

[0015] Figure 3 It is a structural schematic diagram of location A of the present invention.

[0016] In the figure: 1. connecting threaded column; 2. reinforcement neck; 3. tooth palm; 31. threaded hole; 4. gear; 41. main rod; 5. protective cover; 6. connecting seat; 61. cylindrical cavity; 7. bearing; 8. oil plate; 9. sponge block; 10. pressure plate; 11. screw; 111. oil inlet hole; 112. fixing handle; 12. sealing column. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] See also Figures 1 to 3The present invention provides a technical solution: a roller drill bit for hard cutting and biting high-strength raw piles in a confined space, comprising a connecting thread column 1 and a bearing 7, a reinforcing neck 2 is arranged at the top of the connecting thread column 1, three tooth palms 3 are arranged at equal distances on the top edge of the reinforcing neck 2, a roller 4 is rotatably mounted on one end of the tooth palm 3 close to the axis of the connecting thread column 1, and the outer wall of the roller 4 is provided with annularly arranged insert teeth, and the insert teeth are made of high-strength and high-toughness cemented carbide material, a main rod 41 is fixed in the middle of one end of the roller 4 close to the tooth palm 3, and a A connecting seat 6, wherein the connecting seat 6 and the main rod 41 are rotatably connected via the bearing 7, a cylindrical cavity 61 is provided on the side of the connecting seat 6 close to the tooth palm 3, a sponge block 9 is provided in the middle of the cylindrical cavity 61, an oil plate 8 is provided on the side of the cylindrical cavity 61 close to the bearing 7, and oil holes are evenly provided on the oil plate 8, one end of the oil plate 8 abuts against the sponge block 9, and the other end contacts the bearing 7, when the sponge block 9 is compressed, the lubricating oil in the sponge block 9 is squeezed out, and then the bearing 7 is lubricated through the oil holes on the oil plate 8, the cylindrical cavity 61 A pressure plate 10 is provided on one side of the inner part close to the tooth palm 3. When the sponge block 9 is in a natural state, the pressure plate 10 and the end surface of the oil-passing plate 8 away from the sponge block 9 are respectively abutted against the inner wall of the cylindrical cavity 61. A screw 11 is rotatably connected to the middle of the end of the pressure plate 10 away from the sponge block 9. An oil inlet hole 111 is provided at the axis of the screw 11. A sealing column 12 is installed inside the oil inlet hole 111. A threaded hole 31 is provided on the tooth palm 3. The screw 11 passes through the threaded hole 31 and extends to the outside of the tooth palm 3. In this device, a cylindrical cavity 61 is provided so that the displacement range of the screw 11 is small, and a clockwise rotation is set. Rotate the fixed handle 112, and the screw 11 rotates along the threaded hole 31 toward the inside of the connecting seat 6, driving the pressure plate 10 to squeeze the sponge block 9. Rotate the fixed handle 112 counterclockwise, and the screw 11 rotates along the threaded hole 31 away from the connecting seat 6, so that the sponge block 9 recovers and sucks back the lubricating oil, reducing waste. The fixed handle 112 is fixed, and one end of the oil inlet hole 111 passes through the outer surface of the fixed handle 112, and the other end passes through the pressure plate 10. Before work, take out the sealing column 12 from the inside of the oil inlet hole 111, then pour the lubricating oil into the inside of the oil inlet hole 111, and then drip the lubricating oil onto the sponge block 9.

[0019] A protective cover 5 is fixed to one end of the gear 4 close to the tooth palm 3. The bottom of the protective cover 5 is bent inward and is rotatably connected to the connecting seat 6. The protective cover 5 is made of nitrile rubber, which can reduce the entry of external impurities into the connection between the main rod 41 and the connecting seat 6 when the gear 4 is working.

[0020] Working principle: When using the roller drill bit for hard cutting and biting high-strength piles in a confined space, first take out the sealing column 12 from the oil inlet hole 111, then pour the lubricating oil into the oil inlet hole 111, so that the lubricating oil is absorbed by the sponge block 9, and the sponge block 9 is soaked with the lubricating oil. Then insert the sealing column 12 into the oil inlet hole 111, so that the lubricating oil in the sponge block 9 will not flow back into the oil inlet hole 111, and rotate the fixing handle 112 clockwise to make the screw 11 rotate along the threaded hole 31 toward the inside of the connecting seat 6, driving the pressure plate 10 to squeeze the sponge block 9, so that the lubricating oil in the sponge block 9 is squeezed out, and then the squeezed lubricating oil lubricates the bearing 7 through the oil hole on the oil plate 8, so that the roller 4 rotates smoothly and reduces wear.

[0021] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A roller drill bit for hard cutting and biting high-strength piles in a confined space, comprising a connecting thread column (1) and a bearing (7), wherein a reinforcing neck (2) is arranged at the top of the connecting thread column (1), three tooth palms (3) are arranged at equal distances on the top edge of the reinforcing neck (2), and a roller (4) is rotatably mounted on one end of each tooth palm (3) close to the axis of the connecting thread column (1), characterized in that: A main rod (41) is fixed in the middle of one end of the tooth wheel (4) close to the tooth palm (3); a connecting seat (6) is fixed in the end of the tooth palm (3) close to the tooth wheel (4); the connecting seat (6) and the main rod (41) are rotatably connected via the bearing (7); a cylindrical cavity (61) is provided in the inside of the connecting seat (6) on one side close to the tooth palm (3); a sponge block (9) is provided in the middle of the cylindrical cavity (61); and a sponge block (9) is provided in the inside of the cylindrical cavity (61) on one side close to the bearing (7). An oil-passing plate (8), a pressure plate (10) is arranged on one side of the cylindrical cavity (61) close to the tooth palm (3), a screw rod (11) is rotatably connected to the middle of one end of the pressure plate (10) away from the sponge block (9), an oil inlet hole (111) is provided at the axis of the screw rod (11), and a sealing column (12) is installed inside the oil inlet hole (111); oil holes are evenly arranged on the oil-passing plate (8), one end of the oil-passing plate (8) is in contact with the sponge block (9), and the other end is in contact with the bearing (7); A protective cover (5) is fixed to one end of the gear wheel (4) close to the tooth palm (3); the bottom of the protective cover (5) is bent inwards and is rotatably connected to the connecting seat (6); A threaded hole (31) is formed on the tooth palm (3), the screw rod (11) passes through the threaded hole (31) and extends to the outside of the tooth palm (3), and is fixed with a fixing handle (112); One end of the oil inlet hole (111) passes through the outer surface of the fixing handle (112), and the other end passes through the pressing plate (10).

2. The roller drill bit for hard cutting and biting high-strength piles in confined spaces according to claim 1, characterized in that: The outer wall of the cone (4) is provided with inserts arranged in a ring shape, and the inserts are made of hard alloy material.

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