Lubrication control system for impact rotary drilling with underreamer

Abstract

The application provides a lubrication control system of a percussion rotary drilling machine, and belongs to the technical field of hydraulic control systems, and comprises a variable pump, a proportional valve, a pilot handle, a percussion rotary drilling machine, a shuttle valve, a speed regulating valve, a hydraulic pilot valve, an air source and a lubrication driving device; the percussion rotary drilling machine is used to replace the rotary drilling machine, so as to adapt to high-hardness rock strata, weathered rock strata and hard and brittle geology; the rotation action of the percussion rotary drilling machine is linked with the starting of lubricating oil, so that automatic lubrication is realized after the percussion rotary drilling machine is started, the problem of untimely lubrication is avoided, the lubrication effect of the drilling machine is improved, the reliability of the rotation of the drilling machine is ensured, and the equipment failure rate is reduced.

Description

Technical Field

[0001] This invention belongs to the technical field of hydraulic control systems, and specifically discloses a lubrication control system for impact rotary drilling of a bottom-mounted drilling machine. Background Technology

[0002] The fully mechanized mining face is the foundation for ensuring safe and efficient coal mining. During the mining process, the floor may become hollow, and the side and roof rocks may be severely weathered and unstable. By using a drilling machine to precisely drill holes and install anchor bolts for maintenance, the support effect can be significantly improved, while reducing the dangers of manual operation.

[0003] Currently, drilling machines commonly use rotary drilling rigs for drilling. Rotary drilling rigs are hydraulically driven, rotating and feeding simultaneously. They are generally suitable for rock formations with lower hardness but cannot handle harder rock formations, weathered rock formations, or hard and brittle geological conditions. While drilling requires lubrication to prevent equipment damage and drill bit jamming, lubrication is initiated relatively independently of the drilling rig's operation, leading to issues with untimely lubrication. Summary of the Invention

[0004] This invention provides a lubrication control system for underfloor drilling impact rotary drilling, solving the following technical problems:

[0005] 1. Rotary drilling rigs cannot adapt to rock formations with high hardness, weathered rock formations, and hard and brittle geological conditions;

[0006] 2. The lubrication process is relatively independent of the drilling rig's operation, resulting in untimely lubrication.

[0007] The aforementioned percussion rotary drilling lubrication control system includes a variable displacement pump, a proportional valve, a pilot handle, a percussion rotary drilling rig, a shuttle valve, a speed control valve, a hydraulic pilot valve, an air source, and a lubrication drive device. The percussion rotary drilling rig is equipped with a drilling rig rotary motor. The lubrication drive device includes a lubrication pump and a lubrication pump drive motor, with the lubrication pump driven to rotate by the lubrication pump drive motor. The hydraulic oil output from the variable displacement pump is pumped to port P of the proportional valve. Port X of the proportional valve is connected to port P of the pilot handle, port A of the proportional valve is connected to port A of the drilling rig rotary motor and port a of the shuttle valve, and port B of the proportional valve is connected to port B of the drilling rig rotary motor and the shuttle valve. The b port of the proportional valve is connected to the oil tank; the a and b ports of the pilot handle are connected to the a and b ports of the proportional valve, respectively, and the T port of the pilot handle is connected to the oil tank; the c port of the shuttle valve is connected to the inlet of the speed control valve and the Z port of the hydraulic pilot valve, respectively; the air source is connected to the A port of the hydraulic pilot valve, and the B port of the hydraulic pilot valve is connected to the Ps port of the impact rotary drilling rig; under normal conditions, the A and B ports of the hydraulic pilot valve are disconnected, and after reversing, the A and B ports are connected; the outlet of the speed control valve is connected to the lubrication pump drive motor; the A port of the lubrication pump is connected to the lubrication oil tank, and the B port of the lubrication pump is connected between the hydraulic pilot valve and the impact rotary drilling rig.

[0008] The aforementioned lubrication control system for impact rotary drilling rigs also includes a ball valve, an air filter, and a pressure regulating valve; the air source is connected to the inlet of the ball valve, the outlet of the ball valve is connected to the inlet of the air filter, the outlet of the air filter is connected to the inlet of the pressure regulating valve, and the outlet of the pressure regulating valve is connected to port A of the hydraulic pilot valve.

[0009] The aforementioned lubrication control system for impact rotary drilling rigs also includes a return oil filter; the R port of the proportional valve is connected to the inlet of the return oil filter, and the outlet of the return oil filter is connected to the oil tank.

[0010] In the aforementioned impact rotary drilling lubrication control system for a bottom-mounted drilling machine, the lubrication drive device further includes a support frame, a housing, an eccentric shaft, and a wear-resistant ring. The support frame is equipped with an oil inlet. The first end of the housing is connected to the support frame, and the inner cavity of the housing communicates with the oil inlet of the support frame. The eccentric shaft is rotatably installed within the inner cavity of the housing. The housing of the lubrication pump drive motor is connected to the second end of the housing, and the output shaft of the lubrication pump drive motor is connected to the eccentric shaft. The wear-resistant ring is provided with a groove, and the wear-resistant ring is mounted on the eccentric block of the eccentric shaft via a grooved ball bearing I. The lubrication pump passes through the housing, with its port A located within the inner cavity of the housing. The delivery plunger of the lubrication pump is perpendicular to the eccentric shaft, and the first end of the delivery plunger is engaged in the groove.

[0011] In the above-mentioned impact rotary drilling lubrication control system for the underfloor machine, the housing includes an intermediate housing and an end housing; the first end of the intermediate housing is connected to the support frame by bolt I and locking washer I; the first end of the end housing is connected to the second end of the intermediate housing by bolt II and locking washer II; the housing of the lubrication pump drive motor is connected to the second end of the end housing by bolt III and spring washer, and the output shaft and eccentric shaft of the lubrication pump drive motor are connected by splines.

[0012] In the above-mentioned impact rotary drilling lubrication control system for the underbody machine, a grooved ball bearing II is installed between the eccentric shaft and the intermediate housing, and the grooved ball bearing II is limited by a retaining ring I through a hole; the grooved ball bearing I is limited by a retaining ring II through a hole; a deep groove ball bearing is installed between the eccentric shaft and the end housing, and the first end of the deep groove ball bearing is fixed by a spacer and sealed by a shaft seal, and the second end is fixed by a retaining ring.

[0013] In the above-mentioned impact rotary drilling lubrication control system for the under-ground machine, an O-ring seal I is installed between the end housing and the intermediate housing, and an O-ring seal II is installed between the intermediate housing and the support frame; a process hole is provided on the intermediate housing, a plug is installed in the process hole, and an O-ring seal III is installed between the plug and the intermediate housing.

[0014] In the aforementioned lubrication control system for impact rotary drilling rigs, the lubrication pump further includes an adjusting screw, a locking nut, a valve body, a valve sleeve, a control plunger, a buffer pad I, a connecting sleeve, a valve core, a spring seat, a spring II, a buffer pad II, and a spring I; the adjusting screw is provided with channels I and II, channel I extending from the first end of the adjusting screw into the adjusting screw, and channel II extending from the outer wall of the adjusting screw to communicate with channel I; the valve body is provided with channels III and IV, channel III extending from the first end of the valve body to the second end, and channel IV extending from the valve body... The outer wall extends to communicate with channel III; the valve sleeve is provided with channels V, VI, VII, and VIII, and a groove is provided at the second end of the valve sleeve. Channel V extends from the first end of the valve sleeve to the groove, channel VI extends from the outer wall of the valve sleeve to communicate with channel V, channel VII extends from the groove into the valve sleeve, and channel VIII connects channels V and VII; the connecting sleeve is provided with channel IX, which extends from the first end to the second end of the connecting sleeve; the adjusting screw is threadedly connected to channel III of the valve body, with the first end located inside the valve body and the second end located outside the valve body. II communicates with channel IV; the locking nut is sleeved on the outside of the adjusting screw and abuts against the second end of the valve body; the first end of the buffer pad I is located inside the valve body, and the second end is inserted into channel I of the adjusting screw; spring I is located inside channel I of the adjusting screw; the valve sleeve is inserted into channel III of the valve body, and the second end presses against the buffer pad I; channel VI is located outside the valve body, and channel VIII is located inside the valve body; the control plunger is slidably inserted into channel I of the adjusting screw, buffer pad I, and channel V of the valve sleeve, with the first end located inside channel V of the valve sleeve and the second end located inside channel I of the adjusting screw. A compression spring I; a delivery plunger slidably inserts into orifice V of the valve sleeve, with the first end located outside the valve sleeve and the second end located inside the valve sleeve; a connecting sleeve is fixed on the valve body, orifice IX communicates with orifice IV, and a tapered surface is provided inside orifice IX; a buffer pad II is fixed inside orifice IX of the connecting sleeve; a valve core is slidably installed inside orifice IX of the connecting sleeve, including a guide rod and a tapered end that mates with the tapered surface, the guide rod passing through buffer pad II; a spring seat is fixedly sleeved outside the guide rod; spring II is sleeved on the guide rod, with both ends connected to the spring seat and buffer pad II respectively.

[0015] In the above-mentioned lubrication control system for impact rotary drilling of the underfloor machine, an O-ring seal IV and a sealing gasket I are provided between the connecting sleeve and the valve body, and an O-ring seal V is provided between the valve body and the adjusting screw; the lubrication pump is connected to the intermediate housing through the external thread of the valve body and is sealed by a sealing gasket II; the valve sleeve and the valve body are sealed by a sealing gasket III.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The aforementioned impact rotary drilling lubrication control system replaces the rotary drilling rig with an impact rotary drilling rig to adapt to rock formations with high hardness, weathered rock formations, and hard and brittle geology. At the same time, it links the rotation of the impact rotary drilling rig with the start of the lubricating oil, so as to realize automatic lubrication after the impact rotary drilling rig starts, avoid the problem of untimely lubrication, improve the lubrication effect of the drilling rig, ensure the reliability of the drilling rig rotation, and reduce the equipment failure rate. Attached Figure Description

[0018] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 Hydraulic schematic diagram of the lubrication control system for impact rotary drilling rig;

[0020] Figure 2 This is a schematic diagram of the lubrication drive device.

[0021] Figure 3 This is a schematic diagram of the lubrication pump.

[0022] In the diagram: 1-Variable pump, 2-Proportional valve, 3-Pilot handle, 4-Impact rotary drilling rig, 401-Drilling rig rotary motor, 5-Shuttle valve, 6-Speed ​​control valve, 7-Hydraulic pilot valve, 8-Air source, 9-Lubrication pump, 901-Adjusting screw, 902-Locking nut, 903-Valve body, 904-O-ring seal IV, 905- O-ring V, 906-Sealing gasket I, 907-Sealing gasket II, 908-Sealing gasket III, 909-Valve sleeve, 9010-Conveying plunger, 9011-Control plunger, 9012-Buffer pad I, 9013-Connecting sleeve, 9014-Valve core, 9015-Spring seat, 9016-Spring II, 9017-Buffer pad II, 9018-Spring I, 10-Lubrication pump drive motor, 11-Ball valve, 12-Air filter, 13-Pressure regulating valve, 14-Return oil filter, 15-Support bracket 16-Eccentric shaft, 17-Wear ring, 18-Groove ball bearing I, 19-Intermediate housing, 20-Bolt I, 21-Locking washer I, 22-End housing, 23-Bolt II, 24-Locking washer II, 25-Bolt III, 26-Spring washer, 27-Groove ball bearing II, 28-Bore retaining ring I, 29-Bore retaining ring II, 30-Deep groove ball bearing, 31-Spacer, 32-Shaft seal, 33-Retaining ring, 34-O-ring seal I, 35-O-ring seal II, 36-Plug, 37-O-ring seal III. Detailed Implementation

[0023] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] like Figure 1 As shown, this embodiment provides a lubrication control system for a bottom-mounted rotary impact drilling machine, including a variable pump 1, a proportional valve 2, a pilot handle 3, a rotary impact drill 4, a shuttle valve 5, a speed control valve 6, a hydraulic pilot valve 7, an air source 8, and a lubrication drive device; the rotary impact drill 4 is equipped with a drill rotation motor 401; the lubrication drive device includes a lubrication pump 9 and a lubrication pump drive motor 10, the lubrication pump 9 is driven to rotate by the lubrication pump drive motor 10; the hydraulic oil output from the variable pump 1 is pumped to the P port of the proportional valve 2; the X port of the proportional valve 2 is connected to the P port of the pilot handle 3, the A port of the proportional valve 2 is connected to the A port of the drill rotation motor 401 and the a port of the shuttle valve 5 respectively, and the B port of the proportional valve 2 is connected to the drill rotation motor 401 respectively. Port B of valve 401 is connected to port b of shuttle valve 5, and port R of proportional valve 2 is connected to oil tank; ports a and b of pilot handle 3 are connected to ports a and b of proportional valve 2 respectively, and port T of pilot handle 3 is connected to oil tank; port c of shuttle valve 5 is connected to the inlet of speed control valve 6 and port Z of hydraulic pilot valve 7 respectively; air source 8 is connected to port A of hydraulic pilot valve 7, and port B of hydraulic pilot valve 7 is connected to port Ps of impact rotary drilling rig 4; ports A and B of hydraulic pilot valve 7 are normally disconnected, and ports A and B are connected after reversal; outlet of speed control valve 6 is connected to lubrication pump drive motor 10; port A of lubrication pump 9 is connected to lubricating oil tank, and port B of lubrication pump 9 is connected between hydraulic pilot valve 7 and impact rotary drilling rig 4.

[0025] like Figure 1 As shown, the above-mentioned underground drilling impact rotary drilling lubrication control system also includes a ball valve 11, an air filter 12, and a pressure regulating valve 13; the air source 8 is connected to the inlet of the ball valve 11, the outlet of the ball valve 11 is connected to the inlet of the air filter 12, the outlet of the air filter 12 is connected to the inlet of the pressure regulating valve 13, and the outlet of the pressure regulating valve 13 is connected to port A of the hydraulic pilot valve 7.

[0026] like Figure 1 As shown, the above-mentioned bottom-mounted impact rotary drilling lubrication control system also includes a return oil filter 14; the R port of the proportional valve 2 is connected to the inlet of the return oil filter 14, and the outlet of the return oil filter 14 is connected to the oil tank.

[0027] Air source 8 is supplied via an external air source, and after the pressure is adjusted by ball valve 11, air filter 12, and pressure regulating valve 13, it reaches port A of hydraulic pilot valve 7. Under normal conditions, ports A and B of hydraulic pilot valve 7 are disconnected. When there is pressurized oil at port Z, the valve is pushed to the right position, and ports A and B are connected.

[0028] like Figure 2 As shown, in the lubrication drive device, the lubrication pump drive motor 10 drives the lubrication pump 9, and the two are connected by an eccentric shaft 16. The amount of oil output from the lubrication pump 9 can be controlled according to the speed of the lubrication pump drive motor 10. The outlet of the lubrication pump 9 is connected to the Ps port of the impact rotary drill 4, which can guide the lubricating oil to be delivered into the impact rotary drill 4 for lubrication.

[0029] The lubrication drive device is automatically triggered when the drilling rig rotary motor 401 operates. Regardless of whether the drilling rig rotary motor 401 rotates forward or backward, i.e., regardless of whether pressure oil is output from port A or port B of the proportional valve 2, the pressure oil can enter port A of the drilling rig rotary motor 401 and port a of the shuttle valve 5, or port B of the drilling rig rotary motor 401 and port b of the shuttle valve 5, through the proportional valve 2. Simultaneously, as the drilling rig rotary motor 401 rotates, the pressure oil passes through port c of the shuttle valve 5, reaching the inlet of the speed control valve 6 and port Z of the hydraulic pilot valve 7. The lubrication pump drive motor 10 starts, driving the lubrication pump 9 to output lubricating oil, the speed of which can be adjusted by the speed control valve 6. Under the action of the pressure oil, port Z of the hydraulic pilot valve 7 is switched to the right position, i.e., port A and port B are connected. Compressed air enters port Ps of the impact rotary drilling rig 4 through this valve, mixing with the lubricating oil.

[0030] The above-mentioned bottom-mounted impact rotary drilling lubrication control system uses an impact rotary drilling rig 4 instead of a rotary drilling rig to adapt to rock formations with high hardness, weathered rock formations, and hard and brittle geology. At the same time, it can automatically start the output of compressed air and lubricating oil when the drilling rig rotary motor 401 rotates, and lubricate the equipment according to the preset ratio of compressed air and lubricating oil, so as to avoid premature wear or other consequences of equipment due to negligence in lubrication.

[0031] like Figure 2 and 3As shown, in the above-mentioned impact rotary drilling lubrication control system for the underbody drilling machine, the lubrication drive device also includes a support frame 15, a housing, an eccentric shaft 16, and a wear-resistant ring 17; the support frame 15 is provided with an oil inlet; the first end of the housing is connected to the support frame 15, and the inner cavity of the housing is connected to the oil inlet of the support frame 15; the eccentric shaft 16 is rotatably installed in the inner cavity of the housing; the housing of the lubrication pump drive motor 10 is connected to the second end of the housing, and the output shaft of the lubrication pump drive motor 10 is connected to the eccentric shaft 16; the wear-resistant ring 17 is provided with a groove, and the wear-resistant ring 17 is installed on the eccentric block of the eccentric shaft 16 through a grooved ball bearing I 18; the lubrication pump 9 passes through the housing, the A port of the lubrication pump 9 is located in the inner cavity of the housing, the delivery plunger 9010 of the lubrication pump 9 is perpendicular to the eccentric shaft 16, and the first end of the delivery plunger 9010 is stuck in the groove.

[0032] The oil inlet of the support frame 15 is connected to the lubricating oil tank. The housing is filled with lubricating oil. When the lubricating pump drive motor 10 rotates, it drives the eccentric shaft 16 to rotate. Due to the first end of the delivery plunger 9010 being stuck in the groove of the wear ring 17 and the presence of the grooved ball bearing I 18, the wear ring 17 does not rotate with the eccentric shaft 16, but moves back and forth under the action of the eccentric block, driving the delivery plunger 9010 to move back and forth, thus completing the oil suction and discharge action of the lubricating pump 9.

[0033] like Figure 2 As shown, in the above-mentioned impact rotary drilling lubrication control system for the underfloor machine, the housing includes an intermediate housing 19 and an end housing 22; both ends of the intermediate housing 19 and the end housing 22 are provided with flange holes; the first end of the intermediate housing 19 is connected to the support frame 15 by bolt I 20 and locking washer I 21; the first end of the end housing 22 is connected to the second end of the intermediate housing 19 by bolt II 23 and locking washer II 24; the housing of the lubrication pump drive motor 10 is connected to the second end of the end housing 22 by bolt III 25 and spring washer 26, and the output shaft and the eccentric shaft 16 are connected by splines.

[0034] like Figure 2 As shown, in the above-mentioned impact rotary drilling lubrication control system for the underbody machine, a grooved ball bearing II27 is installed between the eccentric shaft 16 and the intermediate housing 19. The grooved ball bearing II27 is limited by a retaining ring I28 through the hole; the grooved ball bearing I18 is limited by a retaining ring II29 through the hole; a deep groove ball bearing 30 is installed between the eccentric shaft 16 and the end housing 22. The first end of the deep groove ball bearing 30 is fixed by a spacer 31 and sealed by a shaft seal 32, and the second end is fixed by a retaining ring 33.

[0035] like Figure 2As shown, in the above-mentioned impact rotary drilling lubrication control system for the underbody machine, an O-ring seal I 34 is installed between the end housing 22 and the intermediate housing 19, and an O-ring seal II 35 is installed between the intermediate housing 19 and the support frame 15; a process hole is provided on the intermediate housing 19, a plug 36 is installed in the process hole, and an O-ring seal III 37 is installed between the plug 36 and the intermediate housing 19.

[0036] like Figure 3As shown, in the above-mentioned lubrication control system for impact rotary drilling of the underbody machine, the lubrication pump 9 further includes an adjusting screw 901, a locking nut 902, a valve body 903, a valve sleeve 909, a control plunger 9011, a buffer pad I 9012, a connecting sleeve 9013, a valve core 9014, a spring seat 9015, a spring II 9016, a buffer pad II 9017, and a spring I 9018; the adjusting screw 901 is provided with a channel I and a channel II, the channel I extending from the first end of the adjusting screw 901 into the adjusting screw 901, and the channel II extending from the outer wall of the adjusting screw 901 to communicate with the channel I; the valve body 903 is provided with a channel III and a channel IV, the channel III extending from the first end of the valve body 903 into the second end... The valve body 903 has a valve sleeve 909 with channels V, VI, VII, and VIII. A groove is located at the second end of the valve sleeve 909. Channel V extends from the first end of the valve sleeve 909 to the groove. Channel VI extends from the outer wall of the valve sleeve 909 to communicate with channel V. Channel VII extends from the groove into the valve sleeve 909. Channel VIII connects channels V and VII. The connecting sleeve 9013 has a channel IX extending from the first end to the second end. The adjusting screw 901 is threadedly connected to channel III of the valve body 903, with its first end inside the valve body 903 and its second end outside the valve body 903. Channel II communicates with channel IV. A tightening nut 902 is sleeved on the outside of the adjusting screw 901 and abuts against the second end of the valve body 903; the first end of the buffer pad I 9012 is located inside the valve body 903, and the second end is inserted into the channel I of the adjusting screw 901; the spring I 9018 is located inside the channel I of the adjusting screw 901; the valve sleeve 909 is inserted into the channel III of the valve body 903, and the second end presses against the buffer pad I 9012; channel VI is located outside the valve body 903, and channel VIII is located inside the valve body 903; the control plunger 9011 is slidably inserted into the channel I of the adjusting screw 901, the buffer pad I 9012, and the channel V of the valve sleeve 909; the first end is located inside the channel V of the valve sleeve 909, and the second end is located inside the channel I of the adjusting screw 901, pressing against the spring. Spring I 9018; delivery plunger 9010 is slidably inserted into orifice V of valve sleeve 909, with the first end located outside valve sleeve 909 and the second end located inside valve sleeve 909; connecting sleeve 9013 is fixed on valve body 903, orifice IX communicates with orifice IV, and a tapered surface is provided in orifice IX; buffer pad II 9017 is fixed in orifice IX of connecting sleeve 9013; valve core 9014 is slidably installed in orifice IX of connecting sleeve 9013, including guide rod and tapered end that mates with tapered surface, the guide rod passes through buffer pad II 9017; spring seat 9015 is fixedly sleeved on the outside of guide rod; spring II 9016 is sleeved on guide rod, with both ends connected to spring seat 9015 and buffer pad II 9017 respectively.

[0037] Lubricating oil enters through orifice V of valve sleeve 909 (i.e., port A of lubrication pump 9). When delivery plunger 9010 moves to the left, it pushes control plunger 9011 and buffer pad I 9012 to compress spring I 9018. The lubricating oil passes through orifice VIII, orifice VII, and groove of valve sleeve 909, through buffer pad I 9012, and enters orifice I and orifice II of adjusting screw 901. Then, it passes through orifice IV of valve body 903 and orifice IX of connecting sleeve 9013 (i.e., port B of lubrication pump 9), pushes valve core 9014 downward to compress spring II 9016, and is discharged between guide rod and buffer pad II 9017, entering between hydraulic pilot valve 7 and impact rotary drill 4.

[0038] The displacement of the lubrication pump 9 can be set by adjusting the stroke of the control plunger 9011 through the adjusting screw 901. After adjustment, it can be locked with the lock nut 902.

[0039] like Figure 3 As shown, in the above-mentioned impact rotary drilling lubrication control system for the underbody machine, an O-ring seal Ⅳ904 and a sealing gasket Ⅰ906 are provided between the connecting sleeve 9013 and the valve body 903, and an O-ring seal Ⅴ905 is provided between the valve body 903 and the adjusting screw 901; the lubrication pump 9 is connected to the intermediate housing 19 through the external thread of the valve body 903 and sealed by a sealing gasket Ⅱ907; the valve sleeve 909 and the valve body 903 are sealed by a sealing gasket Ⅲ908.

[0040] The above-mentioned bottom-mounted rotary drilling impact lubrication control system has the following advantages:

[0041] 1. When the drilling rig rotary motor 401 rotates, the output of compressed air and lubricating oil will be automatically activated;

[0042] 2. The output amount of lubricating oil can be controlled by adjusting the stroke of the control plunger 9011 through adjusting the screw 901;

[0043] 3. The speed of the lubrication pump drive motor 10 can be controlled within an effective range;

[0044] 4. The proper installation of the lubrication pump 9 ensures that the lubrication pump 9 can reciprocate when the lubrication pump drive motor 10 rotates.

[0045] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A down-the-hole machine percussive rotary drilling lubrication control system, characterized in that, Variable pump (1), proportional valve (2), pilot handle (3), percussion rotary drilling machine (4), shuttle valve (5), speed regulating valve (6), hydraulic control pilot valve (7), air source (8) and lubricating driving device are included. The percussion rotary drilling machine (4) is provided with a drilling machine rotary motor (401). The lubricating driving device includes a lubricating pump (9) and a lubricating pump driving motor (10), and the lubricating pump (9) is driven to rotate by the lubricating pump driving motor (10). The hydraulic oil output by the variable pump (1) is pumped to the P port of the proportional valve (2). The X port of the proportional valve (2) is connected with the P port of the pilot handle (3), the A port of the proportional valve (2) is connected with the A port of the drilling machine rotary motor (401) and the a port of the shuttle valve (5) respectively, the B port of the proportional valve (2) is connected with the B port of the drilling machine rotary motor (401) and the b port of the shuttle valve (5) respectively, and the R port of the proportional valve (2) is connected with the oil tank. The a port and the b port of the pilot handle (3) are connected with the a port and the b port of the proportional valve (2) respectively, and the T port of the pilot handle (3) is connected with the oil tank. The c port of the shuttle valve (5) is connected with the inlet of the speed regulating valve (6) and the Z port of the hydraulic control pilot valve (7) respectively. The air source (8) is connected with the A port of the hydraulic control pilot valve (7), and the B port of the hydraulic control pilot valve (7) is connected with the Ps port of the percussion rotary drilling machine (4). The A port and the B port of the hydraulic control pilot valve (7) are disconnected in normal state, and are communicated after reversing. The outlet of the speed regulating valve (6) is connected with the lubricating pump driving motor (10). The A port of the lubricating pump (9) is connected with the lubricating oil tank, and the B port of the lubricating pump (9) is connected between the hydraulic control pilot valve (7) and the percussion rotary drilling machine (4).

2. The under-reamer impact-rotary drilling lubrication control system of claim 1, wherein, Ball valve (11), air path filter (12) and pressure regulating valve (13) are further included. The air source (8) is connected with the inlet of the ball valve (11), the outlet of the ball valve (11) is connected with the inlet of the air path filter (12), the outlet of the air path filter (12) is connected with the inlet of the pressure regulating valve (13), and the outlet of the pressure regulating valve (13) is connected with the A port of the hydraulic control pilot valve (7).

3. The under-reamer impact-rotary drilling lubrication control system of claim 1, wherein, Oil return filter (14) is further included. The R port of the proportional valve (2) is connected with the inlet of the oil return filter (14), and the outlet of the oil return filter (14) is connected with the oil tank.

4. The under-reamer impact-rotary drilling lubrication control system of claim 1, wherein, The lubricating driving device further includes a support frame (15), a shell, an eccentric shaft (16) and a wear-resistant ring (17). An oil inlet is arranged on the support frame (15); The first end of the shell is connected with the support frame (15), and the inner cavity of the shell is communicated with the oil inlet of the support frame (15); The eccentric shaft (16) is rotatably installed in the inner cavity of the shell; The shell of the lubricating pump driving motor (10) is connected with the second end of the shell, and the output shaft of the lubricating pump driving motor (10) is connected with the eccentric shaft (16); The wear-resistant ring (17) is provided with a clamping groove, and the wear-resistant ring (17) is installed on the eccentric block of the eccentric shaft (16) through the slotted ball bearing I (18). The lubricating pump (9) penetrates through the shell, the A port of the lubricating pump (9) is located in the inner cavity of the shell, the delivery plunger (9010) of the lubricating pump (9) is perpendicular to the eccentric shaft (16), and the first end of the delivery plunger (9010) is clamped in the clamping groove.

5. The under-reamer impact-rotary drilling lubrication control system of claim 4, wherein, The shell comprises an intermediate shell (19) and an end shell (22); The first end of the intermediate shell (19) is connected with the support frame (15) through the bolt I (20) and the locking washer I (21); The first end of the end shell (22) is connected with the second end of the intermediate shell (19) through the bolt II (23) and the locking washer II (24); The shell of the lubricating pump drive motor (10) is connected with the second end of the end shell (22) through the bolt III (25) and the spring washer (26), and the output shaft of the lubricating pump drive motor (10) and the eccentric shaft (16) are connected through the spline.

6. The under-reamer impact-rotary drilling lubrication control system of claim 5, wherein, A slotted ball bearing II (27) is installed between the eccentric shaft (16) and the intermediate shell (19), and the slotted ball bearing II (27) is limited by the hole stop ring I (28); The slotted ball bearing I (18) is limited by the hole stop ring II (29); A deep groove ball bearing (30) is installed between the eccentric shaft (16) and the end shell (22), the first end of the deep groove ball bearing (30) is fixed through the spacer sleeve (31) and sealed through the shaft seal (32), and the second end is fixed through the stop ring (33).

7. The under-reamer impact-rotary drilling lubrication control system of claim 6, wherein, An O-shaped sealing ring I (34) is installed between the end shell (22) and the intermediate shell (19), and an O-shaped sealing ring II (35) is installed between the intermediate shell (19) and the support frame (15); A process hole is arranged on the intermediate shell (19), a plug (36) is installed in the process hole, and an O-shaped sealing ring III (37) is installed between the plug (36) and the intermediate shell (19).

8. A drag bit machine impact rotary drilling lubrication control system according to any one of claims 4-7, characterized in that, The lubricating pump (9) further comprises an adjusting screw (901), a locking nut (902), a valve body (903), a valve sleeve (909), a control plunger (9011), a buffer pad I (9012), a connecting sleeve (9013), a valve core (9014), a spring seat (9015), a spring II (9016), a buffer pad II (9017), and a spring I (9018); The adjusting screw (901) is provided with a hole channel I and a hole channel II, the hole channel I extends from the first end of the adjusting screw (901) into the adjusting screw (901), and the hole channel II extends from the outer wall of the adjusting screw (901) to communicate with the hole channel I; The valve body (903) is provided with a hole channel III and a hole channel IV, the hole channel III extends from the first end to the second end of the valve body (903), and the hole channel IV extends from the outer wall of the valve body (903) to communicate with the hole channel III; The valve sleeve (909) is provided with a hole channel V, a hole channel VI, a hole channel VII, and a hole channel VIII, the second end of the valve sleeve (909) is provided with a groove, the hole channel V extends from the first end of the valve sleeve (909) to the groove, the hole channel VI extends from the outer wall of the valve sleeve (909) to communicate with the hole channel V, the hole channel VII extends from the groove into the valve sleeve (909), and the hole channel VIII communicates the hole channel V and the hole channel VII; The connecting sleeve (9013) is provided with a hole channel IX, and the hole channel IX extends from the first end to the second end of the connecting sleeve (9013). The adjusting screw (901) is screwed with the hole III of the valve body (903), the first end is located in the valve body (903), the second end is located outside the valve body (903), the hole II is communicated with the hole IV; The locking nut (902) is sleeved on the adjusting screw (901) and abuts against the second end of the valve body (903); The first end of the buffer pad I (9012) is located in the valve body (903), and the second end is inserted into the hole I of the adjusting screw (901); The spring I (9018) is located in the hole I of the adjusting screw (901); The valve sleeve (909) is inserted with the hole III of the valve body (903), the second end is pressed against the buffer pad I (9012), the hole VI is located outside the valve body (903), and the hole VIII is located inside the valve body (903); The control plunger (9011) is slidingly inserted with the hole I of the adjusting screw (901), the buffer pad I (9012) and the hole V of the valve sleeve (909), the first end is located in the hole V of the valve sleeve (909), and the second end is located in the hole I of the adjusting screw (901) and presses the spring I (9018); The delivery plunger (9010) is slidingly inserted with the hole V of the valve sleeve (909), the first end is located outside the valve sleeve (909), and the second end is located inside the valve sleeve (909); The connecting sleeve (9013) is fixed on the valve body (903), the hole IX is communicated with the hole IV, and a tapered surface is arranged in the hole IX; The buffer pad II (9017) is fixed in the hole IX of the connecting sleeve (9013); The valve core (9014) is slidingly installed in the hole IX of the connecting sleeve (9013) and includes a guide rod and a tapered end portion matched with the tapered surface, and the guide rod passes through the buffer pad II (9017); The spring seat (9015) is fixedly sleeved on the guide rod; The spring II (9016) is sleeved on the guide rod and connected with the spring seat (9015) and the buffer pad II (9017) at both ends.

9. The under-reamer impact-rotary drilling lubrication control system of claim 8, wherein, O-shaped sealing ring IV (904) and sealing ring I (906) are arranged between the connecting sleeve (9013) and the valve body (903), and O-shaped sealing ring V (905) is arranged between the valve body (903) and the adjusting screw (901); The lubricating pump (9) is connected with the intermediate shell (19) through the external thread of the valve body (903) and is sealed by the sealing ring II (907); The valve sleeve (909) and the valve body (903) are sealed by the sealing ring III (908).

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