Underground coal mine automatic rotating hydraulic drilling device with three perforating nozzles

Abstract

The utility model discloses an underground coal mine automatic rotation three-perforation nozzle hydraulic drilling device which comprises a sleeve, a thrust ball bearing, a phi 12 wear-resisting ring, a nozzle protective cover, a three-perforation nozzle, a + 200 perforation, a central vertical perforation, a-200 perforation, a protective cover connecting sleeve, a disc spring, a rotating shaft, a red copper sleeve, a hollow magnet, a clamping spring, a deep groove ball bearing, a liquid inlet K-type connector and a drilling device body. The rotating shaft comprises a T-shaped alloy, an O-shaped ring, a phi 10 wear-resistant ring and a rotating shaft connecting sleeve. The three-perforation nozzle is provided with a + 200 perforation in the radial direction, a central vertical perforation and a-200 perforation in the radial direction, starting points of the three perforations are located on the same straight line, and the three-perforation nozzle is installed in the nozzle shield; the left side and the right side of the protective cover connecting sleeve are sleeved with the threaded buckles respectively, the left side is installed on the nozzle protective cover, the three-perforating-nozzle is tightened and pressed, the right side is tightened at the left end of the rotating shaft, and the underground coal mine automatic rotating hydraulic drilling device with the three-perforating-nozzle is formed.

Description

Technical Field

[0001] The utility model relates to an automatic rotating three-perforation nozzle hydraulic drilling device for underground coal mines, specifically a device for drilling holes in the roof of underground coal mine tunnels by using high-pressure sand-water mixed water to form three beams of sand-water mixed water jets rotating at high speed through three-perforation nozzles. Background Art

[0002] At present, there are two main types of anchor drilling in underground coal mine tunnels: one is a pneumatic handheld anchor drill rig, and the other is a crawler-type fully hydraulic anchor drill rig. The pneumatic handheld anchor drill rig is noisy and has low torque. When encountering hard rock formations, the drill bit advances very slowly, and the drilling efficiency is very low. Although the fully hydraulic anchor drill rig is more efficient and quieter than the pneumatic handheld anchor drill rig, it is heavy and bulky, difficult to move in the tunnel, and inflexible to use. It cannot be used in some narrow places at all. So far, there is no device that is low in noise, high in efficiency, flexible to use, and can rotate by itself without external force to solve this problem. Utility Model Content

[0003] The utility model is to solve a series of problems: "At present, anchor drilling in underground coal mine tunnels is mainly divided into two types: one is a pneumatic handheld anchor drilling rig, and the other is a crawler-type full-hydraulic anchor drilling rig; the pneumatic handheld anchor drilling rig has high noise and low torque, and the drill bit advances very slowly when encountering hard rock formations, and the drilling efficiency is very low; although the full-hydraulic anchor drilling rig is more efficient and quieter than the pneumatic handheld anchor drilling rig, it is heavy and bulky, difficult to move in the tunnel, inflexible to use, and cannot be used in some narrow places." The utility model proposes an automatic rotating three-perforating nozzle hydraulic drilling device for underground coal mines.

[0004] The purpose of this utility model is achieved through the following technical solutions:

[0005] An automatic rotating three-perforation nozzle hydraulic drilling device for underground coal mines, comprising a speed regulating sleeve 1, a thrust ball bearing 2, a Φ12 wear-resistant ring 3, a nozzle shield 4, a three-perforation nozzle 5, a +20 0 Perforation 6, center vertical perforation 7, -20 0Perforation 8, shield connecting sleeve 9, buffer disc spring 10, rotating shaft 11, copper sleeve 12, hollow magnet 13, retaining ring 14, deep groove ball bearing 15, liquid inlet K-type joint 16, drilling device body 17, T-type alloy 18, O-ring 19, Φ10 wear-resistant ring 20, rotating shaft connecting sleeve 21; characterized in that: O-ring 19, Φ10 wear-resistant ring 20 are respectively installed in the center hole sealing groove of the drilling device body 17, T-type alloy 18 is installed in O-ring 19, liquid inlet K-type joint 16 is installed at the right end of the drilling device body 17, tighten and press T-type alloy 18; the deep groove ball bearing 15 is installed Installed at the bottom of the drilling device body 17, clamped by the retaining spring 14, the copper sleeve 12 is installed in the left hole of the drilling device body 17, pressing the deep groove ball bearing 15; the Φ12 wear-resistant ring 3 is installed in the sealing groove of the speed regulating sleeve 1, the thrust ball bearing 2 and the buffer disc spring 10 are installed in the speed regulating sleeve 1 in sequence, and the rotating shaft 11 is installed in the center hole of the thrust ball bearing 2 and the buffer disc spring 10; the hollow magnet 13 is installed on the rotating shaft 11, the rotating shaft connecting sleeve 21 is tightened to the right end of the rotating shaft 11, and the speed regulating sleeve 1 is tightened to the left end of the drilling device body 17; the three perforating nozzles 5 are radially opened +20 0 Perforation 6, center vertical perforation 7, radial opening -20 0 The starting points of the three perforations 8 are on the same straight line, and the three-perforation nozzle 5 is installed in the nozzle guard 4; the left and right sides of the guard connecting sleeve 9 are respectively threaded, the left side is installed on the nozzle guard 4 and tightened to press the three-perforation nozzle 5, and the right side is tightened to the left end of the rotating shaft 11, forming an automatic rotating three-perforation nozzle hydraulic drilling device for coal mines.

[0006] In order to further facilitate the control operation, a speed regulating sleeve 1 is installed on the drilling device body 17 to adjust the rotation speed of the three perforating nozzles 5.

[0007] The utility model has the following advantages over the existing drilling machine:

[0008] 1. With automatic rotation function: three perforated nozzles 5 opened +20 0 Perforation 6, center vertical perforation 7, -20 0 The perforation 8 can realize automatic rotation under the action of high pressure mixed water.

[0009] 2. It has multiple automatic deceleration functions: a hollow magnet 13 is installed on the rotating shaft 11, and a copper sleeve 12 is installed in the drilling device body 17. When the hollow magnet 13 rotates in the copper sleeve 12, it generates excitation resistance, automatically reducing the rotation speed of the rotating shaft 11.

[0010] 3. It has a speed regulating function: a speed regulating sleeve 1 is installed on the drilling device body 17 , and the speed regulating sleeve 1 is rotated to adjust the rotation speed of the three-perforating nozzle 5 .

[0011] 4. Simple structure: The entire coal mine underground automatic rotating three-perforating nozzle hydraulic drilling device is small in size, light in weight, complete in specifications and models, easy to install, and easy to promote and apply. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The present invention will be described in further detail below with reference to the accompanying drawings and embodiments.

[0013] Figure 1 This is a structural diagram of an automatic rotating three-perforating nozzle hydraulic drilling device in a coal mine;

[0014] In the picture:

[0015] Speed ​​regulating sleeve 1, thrust ball bearing 2, Φ12 wear-resistant ring 3, nozzle guard 4, three-hole nozzle 5, +20 0 Perforation 6, center vertical perforation 7, -20 0 Perforating 8, shield connecting sleeve 9, buffer disc spring 10, rotating shaft 11, copper sleeve 12, hollow magnet 13, retaining ring 14, deep groove ball bearing 15, liquid inlet K-type joint 16, drilling device body 17, T-type alloy 18, O-ring 19, Φ10 wear-resistant ring 20, rotating shaft connecting sleeve 21. DETAILED DESCRIPTION

[0016] The utility model is a coal mine underground automatic rotating three-perforation nozzle hydraulic drilling device, comprising a speed regulating sleeve 1, a thrust ball bearing 2, a Φ12 wear-resistant ring 3, a nozzle shield 4, a three-perforation nozzle 5, a +20 0 Perforation 6, center vertical perforation 7, -20 0 Perforation 8, shield connecting sleeve 9, buffer disc spring 10, rotating shaft 11, copper sleeve 12, hollow magnet 13, retaining ring 14, deep groove ball bearing 15, liquid inlet K-type joint 16, drilling device body 17, T-type alloy 18, O-ring 19, Φ10 wear-resistant ring 20, rotating shaft connecting sleeve 21; characterized in that: O-ring 19, Φ10 wear-resistant ring 20 are respectively installed in the center hole sealing groove of the drilling device body 17, T-type alloy 18 is installed in O-ring 19, liquid inlet K-type joint 16 is installed at the right end of the drilling device body 17, tighten and press T-type alloy 18; the deep groove ball bearing 15 is installed Installed at the bottom of the drilling device body 17, clamped by the retaining spring 14, the copper sleeve 12 is installed in the left hole of the drilling device body 17, pressing the deep groove ball bearing 15; the Φ12 wear-resistant ring 3 is installed in the sealing groove of the speed regulating sleeve 1, the thrust ball bearing 2 and the buffer disc spring 10 are installed in the speed regulating sleeve 1 in sequence, and the rotating shaft 11 is installed in the center hole of the thrust ball bearing 2 and the buffer disc spring 10; the hollow magnet 13 is installed on the rotating shaft 11, the rotating shaft connecting sleeve 21 is tightened to the right end of the rotating shaft 11, and the speed regulating sleeve 1 is tightened to the left end of the drilling device body 17; the three perforating nozzles 5 are radially opened +200 Perforation 6, center vertical perforation 7, radial opening -20 0 The starting points of the three perforations 8 are on the same straight line, and the three-perforation nozzle 5 is installed in the nozzle guard 4; the left and right sides of the guard connecting sleeve 9 are respectively threaded, the left side is installed on the nozzle guard 4 and tightened to press the three-perforation nozzle 5, and the right side is tightened to the left end of the rotating shaft 11, forming an automatic rotating three-perforation nozzle hydraulic drilling device for coal mines.

[0017] During operation, the sand-water mixture enters the T-shaped alloy 18, the rotating shaft connecting sleeve 21, the rotating shaft 11, the shield connecting sleeve 9 and enters the three-perforation nozzle 5 through the liquid inlet K-type joint 16; the high-pressure sand-water mixture is ejected straightly at high speed through the central vertical perforation 7, with a radial direction of +20 0 Perforation 6 high-speed oblique injection, radial -20 0 The two diagonal high-speed sand-water mixed water jets form an angle of 40 0 The recoil force pushes the three-perforation nozzle 5 to rotate at high speed; the T-shaped alloy 18 is installed with an O-ring 19, the rotating shaft connecting sleeve 21 is installed with a Φ10 wear-resistant ring 20, and the rotating shaft 11 is installed with a Φ12 wear-resistant ring 3, which plays a sealing role to ensure that the three-perforation nozzle 5 does not leak when rotating at high speed; the drilling device body 17 is installed with a copper sleeve 12, and the rotating shaft 11 is installed with a hollow magnet 13. When the three-perforation nozzle 5 rotates at high speed, the hollow magnet 13 on the rotating shaft 11 rotates at high speed in the copper sleeve 12, causing the copper sleeve 12 to cut the magnetic lines of force to generate eddy currents, thereby increasing the torque of the rotating shaft 11 and reducing the speed of the three-perforation nozzle 5 to reach the appropriate speed when drilling; thrust ball bearings 2 are installed at both ends of the rotating shaft 11 , deep groove ball bearing 15 to ensure the concentric rotation of the rotating shaft and reduce the resistance during rotation, so that the rotating shaft can rotate normally without jamming; a buffer disc spring 10 is installed between the thrust ball bearing 2 in the speed regulating sleeve 1 and the half shaft of the rotating shaft 11, and the speed regulating sleeve 1 is rotated forward and reverse to increase or decrease the friction between the rotating shaft connecting sleeve 21 and the T-shaped alloy 18, so as to accurately adjust the rotation speed of the rotating shaft 11 for a second time, so as to achieve the purpose of accurately adjusting the three-perforating nozzle 5; the three water jets ejected by the three-perforating nozzle 5 rotate at a speed of about 600rpm after speed regulation, forming a rotating high-speed water jet of sand and water mixed water to efficiently open holes in the rock roof of the coal mine, playing the role of automatic rotating three-perforating nozzle drilling for hydraulic drilling in the coal mine.

[0018] When stopping work, slowly stop supplying liquid to the liquid inlet K-type joint 16, slowly stop the rotation of the rotary nozzle, remove the drilling device from the drill hole, rinse it clean, air dry it, and keep it properly.

[0019] Practice has proven that the automatic rotating three-nozzle hydraulic drilling device for underground coal mines, manufactured according to the above implementation scheme, has nozzle diameters selectable between Ø0.8mm, Ø1.5mm, Ø1.8mm, Ø2.0mm, and Ø2.5mm, and pressure ranges of 20MPa, 30MPa, and 40MPa, respectively. This automatic rotating three-nozzle hydraulic drilling device for underground coal mines is fully functional, operates smoothly, is flexible to adjust, and is safe and reliable.

Claims

1. An automatic rotating three-perforation nozzle hydraulic drilling device for underground coal mines, comprising a speed regulating sleeve (1), a thrust ball bearing (2), a Φ12 wear-resistant ring (3), a nozzle shield (4), a three-perforation nozzle (5), a +20 0 Perforation (6), center vertical perforation (7), -20 0 Perforating (8), shield connecting sleeve (9), buffer disc spring (10), rotating shaft (11), copper sleeve (12), hollow magnet (13), retaining spring (14), deep groove ball bearing (15), liquid inlet K-type joint (16), drilling device body (17), T-type alloy (18), O-ring (19), Φ10 wear-resistant ring (20), rotating shaft connecting sleeve (21); characterized in that: The O-ring (19) and the Φ10 wear-resistant ring (20) are respectively installed in the center hole sealing groove of the drilling device body (17), the T-type alloy (18) is installed in the O-ring (19), the liquid inlet K-type joint (16) is installed at the right end of the drilling device body (17), and the T-type alloy (18) is tightened and pressed; the deep groove ball bearing (15) is installed at the bottom of the drilling device body (17) and is clamped by the retaining ring (14), and the copper sleeve (12) is installed in the left hole of the drilling device body (17) to press the deep groove ball bearing (15); The Φ12 wear-resistant ring (3) is installed in the sealing groove of the speed regulating sleeve (1), the thrust ball bearing (2) and the buffer disc spring (10) are installed in the speed regulating sleeve (1) in sequence, and the rotating shaft (11) is installed in the center hole of the thrust ball bearing (2) and the buffer disc spring (10); the hollow magnet (13) is installed on the rotating shaft (11), the rotating shaft connecting sleeve (21) is tightened on the right end of the rotating shaft (11), and the speed regulating sleeve (1) is tightened on the left end of the drilling device body (17); the three perforating nozzles (5) are radially opened at +20 0 Perforation (6), center vertical perforation (7); radial opening -20 0 Perforation (8); the starting points of the three perforations are on the same straight line, and the three-perforation nozzle (5) is installed in the nozzle guard (4); the left and right sides of the guard connecting sleeve (9) are respectively threaded, the left side is installed on the nozzle guard (4), tightened to press the three-perforation nozzle (5), and the right side is tightened to the left end of the rotating shaft (11), forming an automatic rotating three-perforation nozzle hydraulic drilling device in a coal mine.

2. The automatic rotating three-perforating nozzle hydraulic drilling device for underground coal mines according to claim 1 is characterized in that The high-pressure sand-water mixture enters the T-shaped alloy (18), the rotating shaft connecting sleeve (21), the rotating shaft (11), the shield connecting sleeve (9) and enters the three-perforation nozzle (5); the high-pressure sand-water mixture is ejected straightly at high speed through the central vertical perforation (7), with a radial +20 0 Perforation (6) High-speed oblique injection, radial -20 0 The perforation (8) is shot out at a high speed in an oblique line; the two oblique high speed sand-water mixed water jets form an angle of 40 0 The recoil force pushes the three-perforation nozzle (5) to rotate at high speed, forming a high-speed rotating sand-water mixed water jet to open holes in the rock roof of the coal mine, playing the role of automatically rotating the three-perforation nozzle for drilling holes in the coal mine hydraulic drilling.

Images