Hollow drill rod structure capable of preventing drill suction and jamming for impact prevention and pressure relief of high-stress coal seam

Abstract

The utility model discloses a high stress coal seam scour prevention and pressure relief hollow drill rod structure preventing drill suction and jamming, which comprises a hollow drill rod and a connection mode, one end of the hollow drill rod is fixedly connected with a hollow drill bit, the hollow drill rod is provided with a plurality of slag discharge ports, one end of the hollow drill rod far away from the hollow drill bit is fixedly sleeved with a positioning sleeve, and the other end of the hollow drill rod far away from the hollow drill bit is provided with a plurality of slag discharge ports. Inserting plates are fixedly connected to the two sides of the positioning sleeve, a fixing plate is fixedly connected to the outer wall of one end of the connecting drill rod, inserting openings corresponding to the inserting plates are formed in the fixing plate, rotating cavities are formed in the two ends of the fixing plate, threaded rods are fixedly connected to the inner walls of one sides of the rotating cavities, and the threaded rods are sleeved with connecting sleeves in a threaded mode; by means of the arrangement of the split type installation structure, disassembly and assembly can be conveniently achieved, then separate storage can be conducted, follow-up transportation and carrying are convenient, and practicability is good.

Description

Technical Field

[0001] The utility model relates to the field of products related to coal mine construction equipment, in particular to a hollow drill rod structure for preventing drill suction and sticking for anti-blowout and pressure relief of high-stress coal seams. Background Art

[0002] At present, gas extraction technology is usually used for gas control in mines in my country, and gas extraction is still mainly based on underground gas extraction, that is, drilling into coal seams and gas concentration areas, connecting the boreholes to special pipelines, and using extraction equipment to extract the gas in coal seams and goafs to the ground for utilization, or discharging it into the total return air flow. The technology of drilling in prominent coal seams is a gas control problem recognized both at home and abroad. For drilling in soft coal seams, due to the influence of ground stress and gas pressure, the soft coal boreholes shrink severely, and are prone to local instability and damage to form collapsed holes. Therefore, drilling in soft coal seams is the most difficult. During the drilling process of soft coal seams, drill sticking and drill breaking occur frequently, the drilling depth is shallow, the drilling efficiency is low, and the porosity is low. Therefore, there is a technical solution in the prior art that uses a hollow drill rod to discharge coal slag from the rod;

[0003] However, the length of the existing hollow drill rods is mostly fixed, which is not convenient for storage, resulting in the drill rods requiring a large space when transporting or carrying, which is inconvenient to carry and transport and has poor practicality. Utility Model Content

[0004] The utility model aims to provide a hollow drill rod structure for preventing drill suction and sticking for high-stress coal seam anti-blowout and pressure relief, so as to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a hollow drill rod structure for preventing suction and drilling for high-stress coal seam pressure relief, comprising a hollow drill rod and a connecting drill rod, one end of the hollow drill rod is fixedly connected to a hollow drill bit, a plurality of slag discharge ports are provided on the hollow drill rod, a positioning sleeve is fixedly sleeved on one end of the hollow drill rod away from the hollow drill bit, plug plates are fixedly connected on both sides of the positioning sleeve, a fixing plate is fixedly connected to the outer wall of one end of the connecting drill rod, a socket corresponding to the plug plate is provided on the fixing plate, and the fixing plate A rotating chamber is provided at both ends, a threaded rod is fixedly connected to the inner wall of one side of the rotating chamber, a connecting sleeve is threadedly sleeved on the threaded rod, one end of the connecting sleeve passes through the rotating chamber and extends outward, a traction sleeve is sleeved on one end of the connecting sleeve, an embedded block is fixedly connected to the inner side wall of the traction sleeve, an annular groove is provided on the connecting sleeve, the bottom end of the traction sleeve is fixedly connected to a supporting block, the bottom end of the supporting block passes through the rotating chamber and is fixedly connected to a clamping plate, and a clamping groove corresponding to the clamping plate is provided on the outer side wall of the plug plate.

[0006] Preferably, a rotating block is fixedly connected to one end of the connecting sleeve extending outward.

[0007] Preferably, the plurality of slag discharge ports are arranged at equal distances from each other.

[0008] Preferably, a sliding opening communicating with the rotating cavity is provided at the bottom of the fixed plate, a sliding rod is fixedly connected in the sliding opening, and the support block is slidably sleeved on the sliding rod.

[0009] Preferably, the embedding block is slidably inserted in the annular groove.

[0010] Compared with the prior art, the beneficial effects of the utility model are:

[0011] The anti-suction drill-stuck hollow drill rod structure for anti-blowout and pressure relief of high-stress coal seams is assembled by splicing the hollow drill rod and the connecting drill rod. At this time, the plug plate installed on the positioning sleeve will be inserted into the socket on the fixing plate, and then the connecting sleeve will be rotated. Since the connecting sleeve is threadedly sleeved on the threaded rod, the connecting sleeve will move. At the same time, the support block is connected to the connecting sleeve through the traction sleeve. When the connecting sleeve moves, the support block will drive the plug plate to move and insert it into the card slot on the plug plate to realize the assembly and fixation between the connecting drill rod and the hollow drill rod. The utility model can facilitate disassembly and assembly through the setting of the split installation structure, and can then be stored separately, which is convenient for subsequent transportation and carrying, and has good practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural schematic diagram of a hollow drill rod structure for preventing drill suction and sticking for high-stress coal seam anti-blowout and pressure relief of the utility model;

[0013] Figure 2 It is a schematic diagram of the rotating cavity of the hollow drill rod structure for preventing the suction and sticking of the drill for preventing the impact and unloading of pressure in high-stress coal seams of the utility model;

[0014] Figure 3 It is a schematic diagram of the embedded block of the anti-suction drill-stuck hollow drill rod structure for high-stress coal seam anti-blowout and pressure relief of the utility model;

[0015] Figure 4 The utility model is a schematic diagram of the connecting casing structure of the anti-suction drill sticking hollow drill rod structure for anti-blowout and pressure relief of high-stress coal seams.

[0016] In the figure: 1. hollow drill rod; 2. connecting drill rod; 3. hollow drill bit; 4. slag discharge port; 5. positioning sleeve; 6. plug plate; 7. fixing plate; 8. threaded rod; 9. connecting sleeve; 10. traction sleeve; 11. embedded block; 12. annular groove; 13. support block; 14. clamping plate; 15. rotating block; 16. sliding rod. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0018] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0019] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0020] See also Figure 1-4The utility model provides an embodiment of a hollow drill rod structure for preventing suction and drilling for anti-blowout and pressure relief of high-stress coal seams, comprising a hollow drill rod 1 and a connecting drill rod 2, one end of the hollow drill rod 1 is fixedly connected to a hollow drill bit 3, a plurality of slag discharge ports 4 are provided on the hollow drill rod 1, a positioning sleeve 5 is fixedly sleeved on one end of the hollow drill rod 1 away from the hollow drill bit 3, both sides of the positioning sleeve 5 are fixedly connected to plug plates 6, a fixing plate 7 is fixedly connected to the outer wall of one end of the connecting drill rod 2, a plug corresponding to the plug plate 6 is provided on the fixing plate 7, a rotating cavity is provided at both ends of the fixing plate 7, a threaded rod 8 is fixedly connected to the inner wall of one side of the rotating cavity, a connecting sleeve 9 is threadedly sleeved on the threaded rod 8, one end of the connecting sleeve 9 passes through the rotating cavity and extends outward, and a traction sleeve 10 is sleeved on one end of the connecting sleeve 9 An embedded block 11 is fixedly connected to the inner wall of the traction sleeve 10, and an annular groove 12 is provided on the connecting sleeve 9. A support block 13 is fixedly connected to the bottom end of the traction sleeve 10. The bottom end of the support block 13 passes through the rotating cavity and is fixedly connected to a card plate 14. A card groove corresponding to the card plate 14 is provided on the outer wall of the plug plate 6. Specifically, the plug plate 6 on the positioning sleeve 5 will be inserted into the socket on the fixed plate 7, and then the connecting sleeve 9 is rotated. Because the connecting sleeve 9 is threadedly sleeved on the threaded rod 8, the connecting sleeve 9 will move, and the support block 13 is connected to the connecting sleeve 9 through the traction sleeve 10. When the connecting sleeve 9 moves, the support block 13 will drive the card plate 14 to move, so that it is inserted into the card groove on the plug plate 6 to realize the assembly and fixation between the connecting drill rod 2 and the hollow drill rod 1.

[0021] In this embodiment, a rotating block 15 is fixedly connected to one end of the connecting sleeve 9 extending outward, so as to facilitate the rotation of the connecting sleeve 9; a plurality of slag discharge ports 4 are arranged equidistantly; a sliding opening connected to the rotating cavity is provided at the bottom of the fixed plate 7, a sliding rod 16 is fixedly connected in the sliding opening, and the support block 13 is slidably sleeved on the sliding rod 16 to provide sliding support for the support block 13; the embedded block 11 is slidably inserted in the annular groove 12.

[0022] Working principle: First, the hollow drill rod 1 and the connecting drill rod 2 are spliced ​​and assembled. At this time, the plug plate 6 installed on the positioning sleeve 5 will be inserted into the socket on the fixing plate 7, and then the connecting sleeve 9 is rotated. Since the connecting sleeve 9 is threadedly sleeved on the threaded rod 8, the connecting sleeve 9 will move. At the same time, the support block 13 is connected to the connecting sleeve 9 through the traction sleeve 10. When the connecting sleeve 9 moves, the support block 13 will drive the clamping plate 14 to move and insert it into the clamping groove on the plug plate 6 to realize the assembly and fixation between the connecting drill rod 2 and the hollow drill rod 1.

[0023] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A hollow drill rod structure for preventing suction and drilling jamming for preventing blowout and pressure relief in high-stress coal seams, comprising a hollow drill rod (1) and a connecting drill rod (2), characterized in that: One end of the hollow drill rod (1) is fixedly connected to the hollow drill bit (3), and the hollow drill rod (1) is provided with a plurality of slag discharge ports (4). A positioning sleeve (5) is fixedly sleeved on the end of the hollow drill rod (1) away from the hollow drill bit (3), and plug plates (6) are fixedly connected on both sides of the positioning sleeve (5). A fixing plate (7) is fixedly connected to the outer wall of one end of the connecting drill rod (2), and a plug port corresponding to the plug plate (6) is provided on the fixing plate (7). Rotating cavities are provided at both ends of the fixing plate (7), and a threaded rod (8) is fixedly connected to the inner wall of one side of the rotating cavity. A connecting sleeve (9) is threadedly sleeved on the threaded rod (8), one end of the connecting sleeve (9) penetrates the rotating cavity and extends outward, a traction sleeve (10) is sleeved on one end of the connecting sleeve (9), an embedded block (11) is fixedly connected to the inner side wall of the traction sleeve (10), an annular groove (12) is provided on the connecting sleeve (9), a supporting block (13) is fixedly connected to the bottom end of the traction sleeve (10), the bottom end of the supporting block (13) penetrates the rotating cavity and is fixedly connected to a clamping plate (14), and a clamping groove corresponding to the clamping plate (14) is provided on the outer side wall of the plug plate (6).

2. The anti-drilling and anti-drilling hollow drill rod structure for high-stress coal seam anti-blowout and pressure relief according to claim 1 is characterized in that: A rotating block (15) is fixedly connected to one end of the connecting sleeve (9) extending outward.

3. The anti-drilling and anti-drilling hollow drill rod structure for high-stress coal seam anti-blowout and pressure relief according to claim 1 is characterized in that: The plurality of slag discharge ports (4) are arranged at equal distances from each other.

4. The anti-drilling and anti-drilling hollow drill rod structure for anti-blowout and pressure relief of high-stress coal seams according to claim 1 is characterized in that: The bottom of the fixed plate (7) is provided with a sliding opening which is in communication with the rotating cavity, a sliding rod (16) is fixedly connected in the sliding opening, and the support block (13) is slidably sleeved on the sliding rod (16).

5. The anti-drilling and anti-drilling hollow drill rod structure for high-stress coal seam anti-blowout and pressure relief according to claim 1 is characterized by: The embedding block (11) is slidably inserted in the annular groove (12).

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