Triangular drill pipe

Abstract

The invention relates to the technical field of drill rods, and in particular to a triangular drill rod which is easy to connect and easy to clean a pressure relief channel, comprising a rod body, a connecting part a and a connecting head; one end of the rod body is threadedly connected to the connecting head, and the other end is provided with a connecting part a used in conjunction with the connecting head; a cooling channel and a pressure relief channel are provided inside the rod body; a plurality of pressure relief holes connected to the pressure relief channel are provided on the outer side surface of the rod body; the connecting head comprises an intermediate body and a connecting part b; a channel 1 connected to the cooling channel and a channel 2 connected to the pressure relief channel are provided inside the intermediate body; a plurality of water spray ports and a plurality of water inlets are provided on the channel 2, the water spray ports are located in the pressure relief channel, and the water inlet is located between the rod body and the connecting part b; when the pressure relief channel needs to be cleaned, the water inlet is connected to an external water source, and the pressure relief channel is sprayed through the water spray ports, thereby improving the flushing effect of the pressure relief channel.

Description

Technical Field

[0001] The invention relates to the technical field of drill rods, in particular to a triangular drill rod. Background Art

[0002] The triangular drill rod is one of the widely used tools in engineering geology and mineral drilling, and the existing triangular drill rod has various structures. For example, Chinese patent CN201320337080.0 discloses a triangular drill rod, including a rod body with a regular triangle cross section, three sides of the rod body are provided with chip removal grooves along the length direction, one end of the rod body is provided with a connector, and the other end is provided with a connecting hole, the connector is composed of a fastening head with an external thread and a positioning head fixed at the front end of the fastening head, the fastening head and the positioning head are both cylindrical, the diameter of the fastening head is greater than the diameter of the positioning head, the length of the positioning head is greater than the length of the fastening head, the connecting hole is composed of a fastening hole with an internal thread and a positioning hole opened at the rear end of the fastening hole, the connector and the connecting hole match, the positioning structure is provided, the drill rod is accurately installed, the installation error is reduced, the chip removal groove is provided, the chip removal is smoother, and the cooling hole is provided, the cooling water pipe can be passed, which is convenient and fast. Chinese patent CN201020520384.7 discloses a quick-connect triangular drill rod for mining, which includes a rod body and a joint, one end of the joint is inserted into the inner hole of one end of the rod body and connected and fixed by a column pin (3), and a spring pin is arranged on the wall surface of the other end perpendicular to the center line direction, and the spring pin includes a pressure seat, a compression spring and a screw plug, the pressure seat is in a "T" shape, composed of a base and an upward columnar protruding end, the bottom end of the pressure seat is connected to the compression spring, and the bottom end of the compression spring is connected to the screw plug; the columnar protruding end of the pressure seat vertically passes through the wall surface of the joint and protrudes outside the wall surface of the joint; a pin hole is arranged on the wall surface of the other end of the rod body, and the pin hole cooperates with the pressure seat, so that the chip removal is smooth, the connection is fast, firm and effortless. However, the existing triangular drill rod still has the problems of inconvenient connection and difficult cleaning of the pressure relief channel. Summary of the invention

[0003] The object of the present invention is to provide a triangular drill rod which is easy to connect and easy to clean a pressure relief channel.

[0004] The technical solution adopted by the present invention to solve the technical problem is:

[0005] A triangular drill rod, comprising a rod body, a connecting part a and a connecting head; the cross section of the rod body is an equilateral triangle, one end of the rod body is threadedly connected to the connecting head, and the other end is provided with a connecting part a used in conjunction with the connecting head; a cooling channel and a pressure relief channel are provided inside the rod body; a plurality of pressure relief holes connected to the pressure relief channel are opened on the outer side surface of the rod body; the connecting head comprises an intermediate body and a connecting part b; a channel 1 connected to the cooling channel and a channel 2 connected to the pressure relief channel are provided inside the intermediate body; an outer wall of one end of the cooling channel is provided with an external thread a, and an inner wall of the channel 1 is provided with an external thread a. An internal thread a connected to an external thread a is provided, and the rod body is connected to the connecting head through the internal thread a and the external thread a; the end of the intermediate body is fixedly connected to a connecting part b with an external thread b, and the connecting part a is provided with an internal thread b matching the external thread b; a plurality of water spray ports and a plurality of water inlets are provided on the channel 2, the water spray ports are located in the pressure relief channel, and the water inlet is located between the rod body and the connecting part b; when the pressure relief channel needs to be cleaned, the water inlet is connected to an external water source, and the pressure relief channel is sprayed through the water spray ports, thereby improving the flushing effect of the pressure relief channel.

[0006] Furthermore, the water spray port includes a water spray port 1 perpendicular to the pressure relief channel and a water spray port 2 parallel to the pressure relief channel, so as to flush the pressure relief channel in all directions.

[0007] Furthermore, a cover body is threadedly connected to the water inlet to seal the water inlet, and the operation is convenient and quick.

[0008] Furthermore, an annular baffle is fixedly provided on the intermediate body, and the annular baffle is located between the cover body and the rod body, and cooperates with the internal thread a and the external thread a to complete the connection between the rod body and the connector.

[0009] Furthermore, a sealing ring is provided at the connection between the rod body and the connector, and the sealing ring is located between the rod body and the annular baffle, so that the connection between the connector and the rod body is sealed.

[0010] Furthermore, the intermediate body and the connecting portion b are fixedly connected via an intermediate block.

[0011] Furthermore, the cross section of the intermediate body is circular; the cross section of the connecting portion b is circular.

[0012] Furthermore, the plurality of pressure relief holes form a spiral direction, which is opposite to the rotation direction of the rod body when drilling.

[0013] Technical effects of the present invention:

[0014] Compared with the prior art, the triangular drill rod of the present invention has adjacent rod bodies connected by a connector, and the structural design of the connector can also realize the flushing of the pressure relief channel. The water inlet and the water spray outlet are arranged on the connector, which is convenient for processing and operation, and will not affect the rod body. The pressure relief hole of the present invention can not only release the force of coal slag on the drill rod when the hole collapses during drilling, avoiding damage to the inner wall of the rod body, but also can discharge slag when the pressure relief channel is cleaned, has a dual role, and is flexible in use. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the main structure of the present invention;

[0016] Figure 2 It is a schematic diagram of the rod structure of the present invention;

[0017] Figure 3 This is a schematic diagram of the connector structure of the present invention;

[0018] Figure 4 For the present invention Figure 2 Right view of .

[0019] In the figure, rod body 1, connecting part a2, connecting head 3, cooling channel 4, pressure relief channel 5, pressure relief hole 6, sealing ring 7, internal thread b201, intermediate body 301, connecting part b302, channel one 303, channel two 304, internal thread a305, water spray port 306, water inlet 307, cover body 308, annular baffle 309, intermediate block 3010, external thread b3011, water spray port one 3061, water spray port two 3062, external thread a401. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the embodiments of the present invention more clear, the technical solution in the embodiments of the present invention is clearly and completely described below in conjunction with the accompanying drawings.

[0021] Embodiment 1:

[0022] A triangular drill rod involved in the present embodiment includes a rod body 1, a connecting portion a2 and a connecting head 3; the cross section of the rod body 1 is an equilateral triangle, one end of the rod body 1 is threadedly connected to the connecting head 3, and the other end is provided with a connecting portion a2 used in conjunction with the connecting head 3; a cooling channel 4 and a pressure relief channel 5 are provided inside the rod body 1; a plurality of pressure relief holes 6 connected to the pressure relief channel 5 are opened on the outer surface of the rod body 1; the connecting head 3 includes an intermediate body 301 and a connecting portion b302; a channel 1 303 connected to the cooling channel 4 and a channel 2 304 connected to the pressure relief channel 5 are provided inside the intermediate body 301; an outer wall of one end of the cooling channel 4 is provided with an external thread a401, and an inner wall of the channel 1 303 is provided with a pressure relief hole connected to the external thread a4 01 is connected to the internal thread a305, the rod body 1 and the connecting head 3 are connected by the internal thread a305 and the external thread a401; the end of the intermediate body 301 is fixedly connected to the connecting part b302 with the external thread b3011, and the connecting part a2 is provided with an internal thread b201 matching the external thread b3011; a plurality of water spray ports 306 and a plurality of water inlets 307 are provided on the channel 2 304, the water spray ports 306 are located in the pressure relief channel 5, and the water inlet 307 is located between the rod body 1 and the connecting part b302; when the pressure relief channel 5 needs to be cleaned, the water inlet 307 is connected to an external water source, and the pressure relief channel 5 is sprayed through the water spray ports 306, thereby improving the flushing effect of the pressure relief channel 5.

[0023] The water spray port 306 includes a water spray port 1 3061 perpendicular to the pressure relief channel 5 and a water spray port 2 3062 parallel to the pressure relief channel 5, so as to flush the pressure relief channel 5 in all directions.

[0024] The water inlet 307 is threadedly connected with a cover body 308 for sealing the water inlet 307, and the operation is convenient and quick; the intermediate body 301 is fixedly provided with an annular baffle 309, which is located between the cover body 308 and the rod body 1, and cooperates with the internal thread a305 and the external thread a401 to complete the connection between the rod body 1 and the connecting head 3.

[0025] A sealing ring 7 is provided at the connection between the rod body 1 and the connecting head 3, and the sealing ring 7 is located between the rod body 1 and the annular baffle 309, so that the connection between the connecting head 3 and the rod body 1 is sealed; the intermediate body 301 and the connecting part b302 are fixedly connected by an intermediate block 3010; the cross-section of the intermediate body 301 is circular; the cross-section of the connecting part b302 is circular; the plurality of pressure relief holes 6 form a spiral direction, and are opposite to the rotation direction of the rod body 1 when drilling.

[0026] Working principle: When this embodiment is in use, when the drill hole collapses, the coal slag around the rod body 1 enters the pressure relief channel 5 through the pressure relief hole 6, thereby releasing the force of the coal slag on the drill rod and avoiding damage to the inner wall of the rod body 1; when the pressure relief channel 5 needs to be flushed, the cover body 308 is removed, the water inlet 307 is connected to an external water source, and the pressure relief channel 5 is flushed through the water spray port 306, which improves the cleaning effect of the pressure relief channel 5, and the cleaning water and coal slag can be discharged from the pressure relief hole 6, which is convenient and quick to operate.

[0027] The above-mentioned specific implementations are only specific cases of the present invention. The patent protection scope of the present invention includes but is not limited to the product form and style of the above-mentioned specific implementations. Any appropriate changes or modifications made to them by ordinary technicians in the technical field that conform to the claims of the present invention shall fall within the patent protection scope of the present invention.

Claims

1. Triangular drill rod, Features: The invention comprises a rod body (1), a connecting portion a (2) and a connecting head (3); the cross section of the rod body (1) is an equilateral triangle; one end of the rod body (1) is threadedly connected to the connecting head (3), and the other end is provided with a connecting portion a (2) used in conjunction with the connecting head (3); a cooling channel (4) and a pressure relief channel (5) are provided inside the rod body (1); a plurality of pressure relief holes (6) connected to the pressure relief channel (5) are provided on the outer surface of the rod body (1); the connecting head (3) comprises an intermediate body (301) and a connecting portion b (302); a channel 1 (303) connected to the cooling channel (4) and a channel 2 (304) connected to the pressure relief channel (5) are provided inside the intermediate body (301); an outer wall of one end of the cooling channel (4) is provided with an external thread a (401), and an inner wall of the channel 1 (303) is provided with an internal thread connected to the external thread a (401). The rod body (1) and the connecting head (3) are connected via an internal thread a (305) and an external thread a (401); the end of the intermediate body (301) is fixedly connected to a connecting portion b (302) having an external thread b (3011), and the connecting portion a (2) is provided with an internal thread b (201) matching the external thread b (3011); the second channel (304) is provided with a plurality of water spray ports (306) and a plurality of water inlets (307), the water spray ports (306) are located in the pressure relief channel (5), and the water inlets (307) are located between the rod body (1) and the connecting portion b (302); the intermediate body (301) and the connecting portion b (302) are fixedly connected via an intermediate block (3010); the cross section of the intermediate body (301) is circular; the cross section of the connecting portion b (302) is circular.

2. The triangular drill rod according to claim 1, Features: The water spray port (306) comprises a water spray port 1 (3061) perpendicular to the pressure relief channel (5) and a water spray port 2 (3062) parallel to the pressure relief channel (5).

3. The triangular drill rod according to claim 1 or 2, Features: The water inlet (307) is threadedly connected with a cover body (308).

4. The triangular drill rod according to claim 3, Features: An annular baffle (309) is fixedly provided on the intermediate body (301), and the annular baffle (309) is located between the cover body (308) and the rod body (1).

5. The triangular drill rod according to claim 4, Features: A sealing ring (7) is provided at the connection between the rod body (1) and the connecting head (3), and the sealing ring (7) is located between the rod body (1) and the annular baffle (309).

6. The triangular drill rod according to claim 1, Features: The plurality of pressure relief holes (6) form a spiral direction, which is opposite to the rotation direction of the rod body (1) when drilling holes.

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