Drill rod for coal mining

Abstract

The utility model discloses a drill rod for coal mining, which relates to the technical field of coal mining and comprises a mounting plate and a water injection component. A rotating hole is formed in the upper side of the mounting plate, an inner threaded pipe is rotationally connected to the interior of the rotating hole, an outer threaded pipe is connected to the interior of the inner threaded pipe in a threaded mode, a connecting disc is fixed to the lower end of the outer threaded pipe, a drill rod body is fixed to the lower end of the connecting disc, and two corresponding flow guide grooves are formed in the upper end of the drill rod body; a connecting groove is formed in the lower end of the interior of the drill rod body, the two flow guide grooves are both connected with the connecting groove, a connecting frame is fixed to the left side of the mounting plate, a rotating assembly is mounted on the upper side of the mounting plate, and a backflow assembly is arranged in the external threaded pipe and connected with the flow guide groove in the left side. And the water injection assembly comprises a fixed barrel, a sealing cover, a water pump and an L-shaped flow guide pipe, the fixed barrel is fixed to the upper side of the connecting frame, and rapid cooling can be achieved during use.

Description

TECHNICAL FIELD

[0001] The utility model relates to coal mining technical field, concretely is a coal mining with drill rod. BACKGROUND

[0002] In coal mining engineering, electric drill as a commonly used tool, through power drive motor drives drill bit high speed rotation, realizes the drilling operation to coal rock stratum. Its core structure includes motor, transmission mechanism and drill rod, and the drill bit produces cutting force in high speed rotation in working, and the drilling task is completed. The existing electric drill usually adopts high strength alloy steel as the drill rod material, and is equipped with simple heat dissipation structure, such as heat dissipation fin or air cooling device, to cope with the heat generated in the drilling process. Part of electric drill is also installed with overload protection device, and when the temperature exceeds threshold value, power is automatically cut off, to prevent equipment damage. These designs meet the basic needs of coal mining to some extent, and become the important tool of underground drilling operation;

[0003] However, the existing electric drill still has obvious deficiencies when continuously operating for a long time. With the drill rod continuously penetrating into coal rock stratum, the heat generated by friction will continue to accumulate, and the simple heat dissipation structure is difficult to effectively reduce the temperature of the drill rod. This not only leads to the decrease of the strength of the drill rod material, accelerates the wear and even breaks, but also may cause underground fire accident, and therefore we propose a coal mining with drill rod. UTILITY MODEL CONTENT

[0004] The utility model solves the technical problem of overcoming the existing defects, and provides a coal mining with drill rod, which can quickly cool down during use, and can effectively solve the problems in the background art.

[0005] To achieve the above purpose, the utility model provides the following technical scheme: a coal mining with drill rod, comprising a mounting plate and a water injection assembly.

[0006] The mounting plate is provided with a rotating hole on the upper side, an internal thread pipe is rotatably connected inside the rotating hole, an external thread pipe is threadedly connected inside the internal thread pipe, a connecting disc is fixed to the lower end of the external thread pipe, a drill rod body is fixed to the lower end of the connecting disc, two corresponding flow guide grooves are formed in the upper end of the drill rod body, a connecting groove is arranged at the lower end inside the drill rod body, and the two flow guide grooves are connected with the connecting groove, a connecting frame is fixed to the left side of the mounting plate, a rotating assembly is installed on the upper side of the mounting plate, a backflow assembly is arranged inside the external thread pipe, and the backflow assembly is connected with the left flow guide groove.

[0007] The water injection assembly comprises a fixed barrel, a sealing cover, a water pump and an L-shaped flow guide pipe, the upper side of the connecting frame is fixed with the fixed barrel, the upper end inside the fixed barrel is threadedly connected with the sealing cover, the inside of the fixed barrel is provided with the water pump, the water outlet of the water pump is internally fixed with the L-shaped flow guide pipe, the lower end of the fixed barrel is provided with an L-shaped flow guide groove in the barrel wall, the L-shaped flow guide pipe is fixed in the L-shaped flow guide groove, the lower end of the fixed barrel is provided with the cooling assembly, and the input end of the water pump is electrically connected with the output end of the external PLC controller.

[0008] Further, the backflow assembly comprises a liquid injection groove, a flow guide pipe, a rubber sealing pipe, a flow guide hole, a backflow joint and a backflow pipe, the lower end of the fixed barrel is provided with the liquid injection groove in the middle, the L-shaped flow guide pipe is communicated with the liquid injection groove, the inside of the liquid injection groove is fixed with the flow guide pipe, the circumferential surface of the flow guide pipe is fixed with the rubber sealing pipe, the rubber sealing pipe is in close contact with the inner wall of the external threaded pipe, the upper end of the connecting disc is provided with two corresponding flow guide holes, the inside of the left flow guide hole is fixed with the backflow joint, the lower end of the backflow joint is located in the inside of the left flow guide groove, the upper end of the backflow joint is fixed with the backflow pipe, and the upper end of the backflow pipe is located in the inside of the external threaded pipe. The backflow assembly is arranged to drive the water for cooling the drill rod body to backflow.

[0009] Further, the rotating assembly comprises a motor, a gear and a gear ring, the upper side of the mounting plate is provided with the motor, the output shaft of the motor is fixed with the gear, the circumferential surface of the internal threaded pipe is fixed with the gear ring, the gear ring is engaged with the gear, and the input end of the motor is electrically connected with the output end of the external PLC controller. The rotating assembly is arranged to drive the drill rod body to rotate.

[0010] Further, the cooling assembly comprises a semiconductor refrigeration sheet, a temperature sensor, a mounting frame and a cooling fan, the lower end of the fixed barrel is provided with a mounting hole, the inside of the mounting hole is provided with the temperature sensor, the lower end of the fixed barrel is provided with a mounting groove, the inside of the mounting groove is provided with the semiconductor refrigeration sheet, the heat dissipation end of the semiconductor refrigeration sheet is located outside the mounting groove, the refrigeration end of the semiconductor refrigeration sheet is located inside the mounting groove, the lower end of the fixed barrel is fixed with the mounting frame, the inside of the mounting frame is provided with the cooling fan, the cooling fan is correspondingly arranged with the semiconductor refrigeration sheet, the input end of the semiconductor refrigeration sheet and the cooling fan is electrically connected with the output end of the external PLC controller, the temperature sensor is bidirectionally electrically connected with the external PLC controller, and the cooling assembly is arranged to cool the water for cooling the drill rod body.

[0011] Further, the right side of the mounting plate is fixed with a mounting block, the right side of the mounting block is provided with two corresponding mounting holes, and the mounting block and the mounting hole are arranged to connect the mounting plate with the drilling machine used in the coal mine.

[0012] Compared with the prior art, the coal mining drill rod has the following advantages:

[0013] The refrigeration assembly is arranged, so that the water in the fixed barrel can be cooled during use, the water pump is started after cooling to inject the water into the inside of the liquid injection groove, the water entering the inside of the liquid injection groove passes downward through the right guide groove into the inside of the connecting groove, then passes upward through the left guide groove into the inside of the reflux joint and the reflux pipe, and then reflows into the inside of the fixed barrel through the reflux pipe, so that the cooling water can be circulated, and the cooling water flowing through the connecting groove and the two guide grooves can effectively and quickly cool the drill rod body, so that the drill rod body is prevented from being damaged and fire is prevented. BRIEF DESCRIPTION OF DRAWINGS

[0014] Fig. 1 It is a front side structure schematic view of the utility model;

[0015] Fig. 2 It is a reflux assembly structure schematic view of the utility model;

[0016] Fig. 3 It is a connecting groove structure schematic view of the utility model.

[0017] In the figure: 1 mounting plate, 2 inner threaded pipe, 3 outer threaded pipe, 4 connecting disc, 5 drill rod body, 6 water injection assembly, 61 fixed barrel, 62 sealing cover, 63 water pump, 64 L-shaped guide pipe, 7 reflux assembly, 71 liquid injection groove, 72 guide pipe, 73 rubber sealing pipe, 74 guide hole, 75 reflux joint, 76 reflux pipe, 8 rotating assembly, 81 motor, 82 gear, 83 gear ring, 9 cooling assembly, 91 semiconductor refrigeration piece, 92 temperature sensor, 93 mounting bracket, 94 cooling fan, 10 guide groove, 11 connecting groove, 12 connecting bracket, 13 mounting block, 14 mounting hole. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0019] Please refer to Figs. 1-3 The embodiment provides a technical scheme: a coal mining drill rod, which comprises a mounting plate 1 and a water injection assembly 6.

[0020] The installation plate 1 is provided with a rotating hole on the upper side, a female threaded pipe 2 is rotatably connected in the rotating hole, a male threaded pipe 3 is threadedly connected in the female threaded pipe 2, a connecting disc 4 is fixed to the lower end of the male threaded pipe 3, a drill rod body 5 is fixed to the lower end of the connecting disc 4, two corresponding flow guide grooves 10 are formed in the upper end of the drill rod body 5, a connecting groove 11 is arranged in the lower end of the drill rod body 5, the two flow guide grooves 10 are connected with the connecting groove 11, a connecting frame 12 is fixed to the left side of the installation plate 1, a rotating assembly 8 is installed on the upper side of the installation plate 1, a backflow assembly 7 is arranged in the female threaded pipe 3, the backflow assembly 7 is connected with the left flow guide groove 10, the backflow assembly 7 comprises a liquid injection groove 71, a flow guide pipe 72, a rubber sealing pipe 73, a flow guide hole 74, a backflow joint 75 and a backflow pipe 76, the liquid injection groove 71 is formed in the middle of the lower end of the fixed barrel 61, the L-shaped flow guide pipe 64 communicates with the liquid injection groove 71, the flow guide pipe 72 is fixed in the liquid injection groove 71, the rubber sealing pipe 73 is fixed on the circumferential surface of the flow guide pipe 72, the rubber sealing pipe 73 is in close contact with the inner wall of the male threaded pipe 3, two corresponding flow guide holes 74 are formed in the upper end of the connecting disc 4, the backflow joint 75 is fixed in the left flow guide hole 74, the lower end of the backflow joint 75 is located in the left flow guide groove 10, the backflow pipe 76 is fixed to the upper end of the backflow joint 75, the upper end of the backflow pipe 76 is located in the male threaded pipe 3, the rotating assembly 8 comprises a motor 81, a gear 82 and a gear ring 83, the motor 81 is installed on the upper side of the installation plate 1, the gear 82 is fixed on the output shaft of the motor 81, the gear ring 83 is fixed on the circumferential surface of the female threaded pipe 2, the gear ring 83 is engaged with the gear 82, the input end of the motor 81 is electrically connected with the output end of the external PLC controller, the rotating assembly 8 is arranged to drive the drill rod body 5 to rotate, the backflow assembly 7 is arranged to drive the water for cooling the drill rod body 5 to backflow;

[0021] The water injection assembly 6 comprises a fixed barrel 61, a sealing cover 62, a water pump 63 and an L-shaped flow guide pipe 64. The upper side of the connecting frame 12 is fixed with the fixed barrel 61. The upper end of the inside of the fixed barrel 61 is threadedly connected with the sealing cover 62. The inside of the fixed barrel 61 is provided with the water pump 63. The water outlet of the water pump 63 is internally fixed with the L-shaped flow guide pipe 64. An L-shaped flow guide groove is formed in the inner wall of the lower end of the fixed barrel 61. The L-shaped flow guide pipe 64 is fixed in the L-shaped flow guide groove. The lower end of the fixed barrel 61 is provided with the cooling assembly 9. The input end of the water pump 63 is electrically connected with the output end of the external PLC controller. The cooling assembly 9 comprises a semiconductor refrigeration fin 91, a temperature sensor 92, a mounting frame 93 and a heat dissipation fan 94. The lower end of the fixed barrel 61 is provided with a mounting hole. The inside of the mounting hole is mounted with the temperature sensor 92. The lower end of the fixed barrel 61 is provided with a mounting groove. The inside of the mounting groove is mounted with the semiconductor refrigeration fin 91. The heat dissipation end of the semiconductor refrigeration fin 91 is located outside the mounting groove. The refrigeration end of the semiconductor refrigeration fin 91 is located inside the mounting groove. The lower end of the fixed barrel 61 is fixed with the mounting frame 93. The inside of the mounting frame 93 is mounted with the heat dissipation fan 94. The heat dissipation fan 94 corresponds to the semiconductor refrigeration fin 91. The input end of the semiconductor refrigeration fin 91 and the heat dissipation fan 94 are electrically connected with the output end of the external PLC controller. The temperature sensor 92 is bidirectionally electrically connected with the external PLC controller. The cooling assembly 9 is arranged to cool the water for cooling the drill rod body 5. The fixed barrel 61 is arranged to store the water for cooling the drill rod body 5.

[0022] The right side of the mounting plate 1 is fixed with a mounting block 13. The right side of the mounting block 13 is provided with two corresponding mounting holes 14. The mounting plate 1 is connected with the coal mine drilling machine through the mounting block 13 and the mounting holes 14.

[0023] The working principle of the drill rod for coal mining provided by the utility model is as follows: when in use, water is injected into the inside of the fixed barrel 61, then the mounting block 14 is connected with all the drilling machines for coal mining by using the bolt, after connection, the semiconductor refrigerating sheet 91 is started to cool the water in the inside of the fixed barrel 61, the temperature sensor 92 continuously detects the water temperature in the inside of the fixed barrel 61 during the cooling process, when the temperature is too low, the external PLC controller will automatically close the semiconductor refrigerating sheet 91 to avoid freezing due to too low temperature, meanwhile, the external PLC controller automatically controls the cooling fan 94 to work to cool the semiconductor refrigerating sheet 91 during the working process of the semiconductor refrigerating sheet 91, after the water temperature is reduced, the drill rod body 5 is controlled to move downwards by the drilling machine, during the downward movement, the motor 81 is started to drive the gear 82 to rotate to drive the gear ring 83 to rotate, the rotation of the gear ring 83 drives the internal thread pipe 2 to rotate, so that the drill rod body 5 rotates, during the downward movement of the rotating drill rod body 5, the water pump 63 is started to inject water into the inside of the liquid injection groove 71, the water in the inside of the liquid injection groove 71 will pass through the right guide groove 10 to enter the inside of the connecting groove 11, then pass through the left guide groove 10 to enter the inside of the return joint 73 and the return pipe 76, then pass through the return pipe 76 to reflow into the inside of the fixed barrel 61, in this case, water circulation of the cooling water can be realized, the cooling water flowing through the connecting groove 11 and the two guide grooves 10 can effectively rapidly cool the drill rod body 5, so that the drill rod body 5 is prevented from being damaged and fire is prevented from being caused due to high temperature.

[0024] It is worth noting that the external PLC controller disclosed in the above embodiment is Siemens S7-200, and the water pump 63, the motor 81, the semiconductor refrigerating sheet 91, the cooling fan 94 and the temperature sensor 92 can be freely configured according to actual application scenarios, and the external PLC controller controls the water pump 63, the motor 81, the semiconductor refrigerating sheet 91 and the cooling fan 94 to work by using the method commonly used in the prior art.

[0025] The above is only an embodiment of the utility model, and does not limit the patent range of the utility model, and any equivalent structure or equivalent process transformation by using the contents of the utility model specification and drawings, or direct or indirect application in other related technical fields, are also included in the patent protection range of the utility model.

Claims

1. A drill rod for use in coal mining, characterised in that: It includes installation plate (1) and water injection assembly (6); The installation plate (1) is provided with a rotating hole on the upper side, an internally threaded pipe (2) is rotatably connected inside the rotating hole, an externally threaded pipe (3) is threadedly connected inside the internally threaded pipe (2), a connecting disc (4) is fixed to the lower end of the externally threaded pipe (3), a drill rod body (5) is fixed to the lower end of the connecting disc (4), two corresponding flow guide grooves (10) are formed on the upper end of the drill rod body (5), a connecting groove (11) is arranged at the lower end inside the drill rod body (5), the two flow guide grooves (10) are connected with the connecting groove (11), a connecting frame (12) is fixed to the left side of the installation plate (1), a rotating assembly (8) is installed on the upper side of the installation plate (1), a backflow assembly (7) is arranged inside the externally threaded pipe (3), and the backflow assembly (7) is connected with the left flow guide groove (10). The water injection assembly (6) comprises a fixed barrel (61), a sealing cover (62), a water pump (63) and an L-shaped flow guide pipe (64), the upper side of the connecting frame (12) is fixed with the fixed barrel (61), the upper end inside the fixed barrel (61) is threadedly connected with the sealing cover (62), the fixed barrel (61) is internally provided with the water pump (63), the water outlet inside the water pump (63) is fixed with the L-shaped flow guide pipe (64), an L-shaped flow guide groove is formed in the inner wall of the fixed barrel (61) at the lower end, the L-shaped flow guide pipe (64) is fixed inside the L-shaped flow guide groove, and the lower end of the fixed barrel (61) is provided with a cooling assembly (9). The input end of the water pump (63) is electrically connected with the output end of the external PLC controller.

2. A drill rod for use in coal mining according to claim 1 characterised in that: The backflow assembly (7) comprises a liquid injection groove (71), a flow guide pipe (72), a rubber sealing pipe (73), a flow guide hole (74), a backflow connector (75) and a backflow pipe (76), the middle of the lower end of the fixed barrel (61) is provided with the liquid injection groove (71), the L-shaped flow guide pipe (64) is communicated with the liquid injection groove (71), the inside of the liquid injection groove (71) is fixed with the flow guide pipe (72), the circumferential surface of the flow guide pipe (72) is fixed with the rubber sealing pipe (73), the rubber sealing pipe (73) is attached to the inner wall of the externally threaded pipe (3), the upper end of the connecting disc (4) is provided with two corresponding flow guide holes (74), the inside of the left flow guide hole (74) is fixed with the backflow connector (75), the lower end of the backflow connector (75) is located inside the left flow guide groove (10), the upper end of the backflow connector (75) is fixed with the backflow pipe (76), and the upper end of the backflow pipe (76) is located inside the externally threaded pipe (3).

3. The drill rod for coal mining according to claim 1, characterized in that: The rotating assembly (8) comprises a motor (81), a gear (82) and a gear ring (83), the upper side of the installation plate (1) is installed with the motor (81), the output shaft of the motor (81) is fixed with the gear (82), the circumferential surface of the internally threaded pipe (2) is fixed with the gear ring (83), the gear ring (83) is engaged with the gear (82), and the input end of the motor (81) is electrically connected with the output end of the external PLC controller.

4. The drill rod for coal mining according to claim 1, characterized in that: The cooling assembly (9) comprises a semiconductor refrigeration sheet (91), a temperature sensor (92), a mounting frame (93) and a heat dissipation fan (94), a mounting hole is formed in the lower end of the fixed barrel (61), the temperature sensor (92) is mounted in the mounting hole, a mounting groove is formed in the lower end of the fixed barrel (61), the semiconductor refrigeration sheet (91) is mounted in the mounting groove, the heat dissipation end of the semiconductor refrigeration sheet (91) is located outside the mounting groove, the refrigeration end of the semiconductor refrigeration sheet (91) is located inside the mounting groove, the mounting frame (93) is fixed to the lower end of the fixed barrel (61), the heat dissipation fan (94) is mounted in the mounting frame (93), the heat dissipation fan (94) corresponds to the semiconductor refrigeration sheet (91), the input ends of the semiconductor refrigeration sheet (91) and the heat dissipation fan (94) are electrically connected with the output end of the external PLC controller, and the temperature sensor (92) is bidirectionally electrically connected with the external PLC controller.

5. The drill rod for coal mining according to claim 1, characterized in that: The mounting plate (1) is fixed with a mounting block (13) on the right side, and two corresponding mounting holes (14) are formed in the right side of the mounting block (13).

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