Three-edged arc special drill rod

Abstract

The present invention relates to the technical field of drill rods, and specifically to a triangular arc special-shaped drill rod that is easy to connect and maintain, 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 cone connecting part a; a cooling hole is provided at the axial position of the rod body; the connecting head comprises a fixedly connected intermediate body and a cone connecting part b; a channel 1 and a channel 2 are provided inside the intermediate body, both of which are connected to the cooling hole; a spiral rod is fixedly arranged in the channel 1; a water spray port and a water inlet are provided on the channel 2, the water spray port is located in the cooling hole, and the water inlet is located between the rod body and the connecting part b. In the present invention, adjacent rod bodies are connected by a connecting head, and a water inlet and a water spray port for spraying water into the through hole are provided on the connecting head, which is convenient for processing and operation; when the cooling hole needs to be cleaned, the water inlet is connected to an external water source, and the cooling hole is sprayed through the water spray port, thereby improving the flushing effect of the cooling hole.

Description

Technical Field

[0001] The invention relates to the technical field of drill rods, in particular to a three-edged arc special-shaped drill rod. Background Art

[0002] There are a lot of drilling operations in the mining process, and one of the most important equipment in the drilling operation is the drill rod. Among them, the triangular drill rod uses the triangular differential diameter to stir the coal slag so that it does not settle, so that the coal slag can be efficiently discharged during the drilling process, avoiding the soft coal seam from locking the drill tool and causing the drill to get stuck, improving the efficiency of coal mine gas extraction and ensuring safe production in coal mines. The existing triangular drill rod has various structures. For example, Chinese patent CN201420461555.1 discloses an efficient triangular drill rod, including a drill rod body, the drill rod body is a triangular prism, the corners of the triangular prism are arc angles, the front section of the drill rod body is a conical outer cone wire; the tail section of the drill rod body is an inner cone wire; the outer surface of the corner of the drill rod body is provided with a discontinuous concave spiral groove; the depth of the spiral groove is not less than 5mm; the diameter of the tail section of the drill rod body is greater than the diameter of the middle section of the drill rod body. The invention has high drilling efficiency, high slag removal efficiency and high hole formation rate when constructing in soft coal seams. CN201520057086.1 triangular integrally formed drill pipe, including a drill pipe body of an integral structure, the outer surface of the drill pipe body is a triangular prism structure, the edges and corners of the triangular prism surface are circularly transitioned; there is a through hole at the axial position of the drill pipe body; the upper and lower ends of the drill pipe body have an integrally formed necked part that is necked after heating, the necked part at the upper end has an external thread, and the inner hole of the necked part at the lower end has an internal thread, which solves the problem of low strength of triangular drill pipes provided by existing similar patents. However, since this is an integral structure, it is not easy to process and repair. Summary of the invention

[0003] The purpose of the invention is to provide a three-edged arc special-shaped drill rod which is convenient for connection and maintenance.

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

[0005] A triangular arc special-shaped drill rod comprises 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 conical connecting part a matching the connecting head; a cooling hole is provided at the axial center of the rod body; the connecting head comprises an intermediate body and a conical connecting part b fixedly connected to the intermediate body; a channel 1 and a channel 2 both connected to the cooling hole are provided inside the intermediate body; a spiral rod is fixedly arranged in the channel 1, and the spiral rod extends to the other end of the cooling hole; 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 cooling hole, and the water inlet is located between the rod body and the connecting part b; an external thread a is provided on the outer wall of one end of the intermediate body, and the conical connecting part a is provided with an external thread b; an internal thread a matching the external thread a is provided inside one end of the rod body, and an internal thread b matching the external thread b is provided at the other end; the rod body and the connecting head are connected through the internal thread a and the external thread a. Adjacent rod bodies are connected by a connecting head, and a water inlet and a water spray port for spraying water into the through hole are arranged on the connecting head, which is convenient for processing and operation; when the cooling hole needs to be cleaned, the water inlet is connected to an external water source, and the cooling hole is sprayed through the water spray port, thereby improving the flushing effect of the cooling hole.

[0006] Furthermore, the spiral rod is fixedly connected to the center position of the fixing ring, the outer wall of the fixing ring is fixedly connected to the inner wall of the rod body, and the spiral rod is fixedly arranged in the cooling hole through the fixing ring, so that the spiral rod is more stable.

[0007] Furthermore, the spiral rod is coaxially arranged with the cooling hole.

[0008] Furthermore, a cover body is threadedly connected to the water inlet to seal the water inlet, and the operation is convenient and quick.

[0009] 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.

[0010] 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.

[0011] Furthermore, the cross-section of the intermediate body is circular, triangular, quadrilateral or hexagonal; the cross-section of the connecting portion b is circular, triangular, quadrilateral or hexagonal.

[0012] Furthermore, the rod body is provided with three convex edges on the outside, the corners of the convex edges are arc angles, and the convex edges are provided with open grooves, which are provided at intervals along the convex edges.

[0013] Technical effects of the present invention:

[0014] Compared with the prior art, the triangular arc special-shaped drill rod of the present invention has adjacent rod bodies connected by a connecting head, and a water inlet and a water spray port are arranged on the connecting head, which not only improves the flushing effect on the inside of the rod body, but also facilitates processing and maintenance operations, does not require modification of the rod body structure, and has a wide range of applications. The present invention arranges a spiral rod in the cooling hole to improve the cooling effect. The present invention has a simple structural design and is easy to disassemble and assemble, and the number of connections of the rod body can be controlled at will. 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 For the present invention Figure 2 Right view of;

[0018] Figure 4 This is a schematic diagram of the connector and the spiral rod structure of the present invention;

[0019] Figure 5 This is an enlarged view of the fixing ring structure of the present invention.

[0020] In the figure, rod body 1, connecting part a2, connecting head 3, cooling hole 4, sealing ring 5, ridge 6, opening groove 7, internal thread a101, internal thread b102, intermediate body 301, connecting part b302, channel one 303, channel two 304, spiral rod 305, water spray port 306, water inlet 307, external thread a308, external thread b309, fixing ring 3010, cover body 3011, and annular baffle 3012. DETAILED DESCRIPTION

[0021] 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.

[0022] Embodiment 1:

[0023] The present embodiment relates to a triangular arc special-shaped drill rod, comprising a rod body 1, a connecting portion a2 and a connecting head 3; one end of the rod body 1 is threadedly connected to the connecting head 3, and the other end is provided with a conical connecting portion a2 matching the connecting head 3; a cooling hole 4 is provided at the axial position of the rod body 1; the connecting head 3 comprises an intermediate body 301 and a conical connecting portion b302 fixedly connected to the intermediate body 301; a channel 1 303 and a channel 2 304 both connected to the cooling hole 4 are provided inside the intermediate body 301; a spiral rod 305 is fixedly provided in the channel 1 303, and the spiral rod 305 extends to the other end of the cooling hole 4 one end; the channel 2 304 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 cooling hole 4, and the water inlet 307 is located between the rod body 1 and the connecting portion b302; an outer wall of one end of the intermediate body 301 is provided with an external thread a308, and the conical connecting portion a2 is provided with an external thread b309; an inner portion of one end of the rod body 1 is provided with an internal thread a101 matching the external thread a308, and the other end is provided with an internal thread b102 matching the external thread b309; the rod body 1 is connected to the connecting head 3 via the internal thread a101 and the external thread a308. Adjacent rod bodies 1 are connected by a connecting head 3, and a water inlet 307 and a water spray port 306 for spraying water into the through hole are provided on the connecting head 3, which is convenient for processing and operation; when the cooling hole 4 needs to be cleaned, the water inlet 307 is connected to an external water source, and the cooling hole 4 is sprayed through the water spray port 306, thereby improving the flushing effect of the cooling hole 4.

[0024] The spiral rod 305 is fixedly connected to the center position of the fixing ring 3010, the outer wall of the fixing ring 3010 is fixedly connected to the inner wall of the rod body 1, and the spiral rod 305 is fixedly arranged in the cooling hole 4 through the fixing ring 3010, so that the spiral rod 305 is more stable.

[0025] The spiral rod 305 is coaxially arranged with the cooling hole 4.

[0026] The water inlet 307 is threadedly connected with a cover body 3011 for sealing the water inlet 307, and the operation is convenient and quick; the intermediate body 301 is fixedly provided with an annular baffle 3012, which is located between the cover body 3011 and the rod body 1, and cooperates with the internal thread a101 and the external thread a308 to complete the connection between the rod body 1 and the connecting head 3.

[0027] A sealing ring 5 is provided at the connection between the rod body 1 and the connector 3. The sealing ring 5 is located between the rod body 1 and the annular baffle 3012, so that the connection between the connector 3 and the rod body 1 is sealed; the cross section of the intermediate body 301 is circular; the cross section of the connecting part b302 is circular.

[0028] The rod body 1 is provided with three convex ridges 6 on the outside. The convex ridges 6 have arc angles. The convex ridges 6 are provided with open grooves 7. The open grooves 7 are provided at intervals along the convex ridges 6.

[0029] Working principle: In this embodiment, adjacent rod bodies 1 are connected by a connecting head 3, and a water inlet 307 and a water spray port 306 for spraying water into the through hole are provided on the connecting head 3, which is convenient for processing and operation; when the cooling hole 4 needs to be cleaned, the water inlet 307 is connected to an external water source, and the cooling hole 4 is sprayed through the water spray port 306, thereby improving the flushing effect of the cooling hole 4; by arranging a spiral rod 305 in the cooling hole 4, the cooling water swirls in the cooling hole 4, thereby improving the cooling effect; the setting of the open groove 7 enables the drill pipe to have a better slag removal effect when drilling.

[0030] 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. A three-sided arc-shaped drill rod, comprising a rod body (1), a connecting portion a (2) and a connecting head (3); characterized in that: One end of the rod body (1) is threadedly connected to the connecting head (3), and the other end is provided with a cone connecting portion a (2) matching the connecting head (3); a cooling hole (4) is provided at the axial position of the rod body (1); the connecting head (3) comprises an intermediate body (301) and a cone connecting portion b (302) fixedly connected to the intermediate body (301); a channel 1 (303) and a channel 2 (304) are provided inside the intermediate body (301), both of which are connected to the cooling hole (4); a spiral rod (305) is fixedly arranged inside the channel 1 (303), and the spiral rod (305) extends to the other end of the cooling hole (4); 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 inside the cooling hole (4), and the water inlets (307) are located outside the rod body. (1) and the connecting part b (302); one end of the intermediate body (301) is provided with an external thread a (308), and the conical connecting part a (2) is provided with an external thread b (309); one end of the rod body (1) is provided with an internal thread a (101) matching the external thread a (308), and the other end is provided with an internal thread b (102) matching the external thread b (309); the rod body (1) and the connecting head (3) are connected through the internal thread a (101) and the external thread a (308); the spiral rod (305) and the cooling hole (4) are coaxially arranged; the water inlet (307) is threadedly connected with a cover body (3011); an annular baffle (3012) is fixedly provided on the intermediate body (301), and the annular baffle (3012) is located between the cover body (3011) and the rod body (1).

2. The three-sided arc special-shaped drill rod according to claim 1, characterized in that: The spiral rod (305) is fixedly connected to the center position of the fixing ring (3010), and the outer wall of the fixing ring (3010) is fixedly connected to the inner wall of the rod body (1).

3. The three-sided arc special-shaped drill rod according to claim 1, characterized in that: A sealing ring (5) is provided at the connection between the rod body (1) and the connecting head (3), and the sealing ring (5) is located between the rod body (1) and the annular baffle (3012).

4. The three-sided arc-shaped drill rod according to any one of claims 1, 2 and 3, characterized in that: The cross section of the intermediate body (301) is circular, triangular, quadrilateral or hexagonal; the cross section of the connecting portion b (302) is circular, triangular, quadrilateral or hexagonal.

5. The three-sided arc special-shaped drill rod according to claim 4, characterized in that: The rod body (1) is provided with three convex ridges (6) on the outside, the convex ridges (6) have arc angles, and the convex ridges (6) are provided with open grooves (7), which are arranged at intervals along the convex ridges (6).

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