Full-automatic drilling multi-way valve system of hydraulic anchor rod drill rig

Abstract

This invention discloses a fully automatic drilling multi-way valve system for a hydraulic anchor bolt drilling rig, relating to the field of coal mining technology. It includes: an automatic feed directional valve, a motor rotation directional valve, a water spray directional valve, a first directional valve, a second directional valve, and a detection and switching unit that controls the second directional valve to switch direction when the feed cylinder reaches its endpoint. A pilot control oil circuit connects to the start-side hydraulic control ports of the automatic feed directional valve, the motor rotation directional valve, and the water spray directional valve via the second and first directional valves, respectively. Port B of the second directional valve is connected to the return-side hydraulic control port of the automatic feed directional valve. The rodless chamber oil inlet of the feed cylinder is connected to the hydraulic control port of the first directional valve, and port A of the first directional valve is connected to the return oil circuit. In this invention, automatic drilling, drilling water spraying, and automatic return to a stop state to wait for the next automatic drilling process can be achieved by pushing the push rod of the automatic feed directional valve, reducing labor intensity and improving safety, construction efficiency, and construction quality.

Description

Technical Field

[0001] This invention relates to the field of coal mining technology, and in particular to a fully automatic drilling multi-way valve system for a hydraulic anchor drilling rig. Background Technology

[0002] Automated support equipment for coal mine roadways plays a crucial role in reducing manpower, increasing efficiency, reducing labor intensity, and improving construction safety.

[0003] However, in current coal mine roadway support anchor drilling operations, the traditional method involves operators manually operating three control handles on the drilling motor, first and second stage propulsion cylinders, and water spray valve of the anchor drilling rig's multi-way valve assembly. During drilling, the control handles must be continuously operated to manually control the motor's drilling speed and the cylinder's propulsion speed, achieving drilling and water spraying. Another semi-automatic drilling method involves installing a separate control valve assembly external to the drilling multi-way valve, connected to it via external pipelines, to achieve automatic drilling control. After feeding, the motor rotation reversing valve and the feed cylinder reversing valve control handles still need to be manually operated to retract the rotation mechanism. Furthermore, the water valve cannot be controlled during automatic drilling. Neither of these methods can fully automate the entire drilling process. Prolonged work can lead to operator fatigue, poor safety, high work intensity, low efficiency, and inconsistent work quality.

[0004] Therefore, there is an urgent need for a fully automatic drilling multi-way valve system for hydraulic anchor drilling rigs that can automatically drill, spray water during drilling, and automatically return to a stop to wait for the next automatic drilling process, thereby improving safety, construction efficiency, and construction quality. Summary of the Invention

[0005] The purpose of this invention is to provide a fully automatic drilling multi-way valve system for hydraulic anchor drilling rigs to solve the problems existing in the prior art. By adding a set of control valve blocks to form a logic control system, it can realize one-button operation to complete automatic drilling, drilling water spraying, and automatic return to stop to wait for the next automatic drilling process. This can effectively reduce the operator's workload, thereby improving safety, construction efficiency and construction quality.

[0006] To achieve the above objectives, the present invention provides the following solution: The present invention provides a fully automatic drilling multi-way valve system for a hydraulic anchor bolt drilling rig, comprising a three-way multi-way valve assembly, a spring-return type first reversing valve, a second reversing valve, and a detection reversing unit for detecting the arrival of the feed cylinder at the endpoint and controlling the second reversing valve to reverse. The three-way multi-way valve assembly includes an automatic feed reversing valve with push rod reversing function for controlling the extension and retraction of the feed cylinder, a motor rotation reversing valve for controlling the rotation direction of the drilling motor, and a water spray reversing valve for controlling the opening and closing of the water spray valve. The automatic feed reversing valve, the motor rotation reversing valve, and the water spray reversing valve all have a handle control function. The spring-reset type directional valve has an oil tank connected to the P port of the automatic feed directional valve, the motor rotary directional valve, and the water spray directional valve via an oil pump. The pilot control oil circuit sequentially passes through the P port of the second directional valve, the A port of the second directional valve, the P port of the first directional valve, and the B port of the first directional valve, and is connected to the start-side hydraulic control ports of the automatic feed directional valve, the motor rotary directional valve, and the water spray directional valve, respectively. The B port of the second directional valve is connected to the return-side hydraulic control port of the automatic feed directional valve. The rodless chamber oil inlet of the feed cylinder is connected to the hydraulic control port of the first directional valve, and the A port of the first directional valve is connected to the return oil circuit.

[0007] Preferably, the fully automatic drilling multi-way valve system of the hydraulic anchor drilling rig further includes a spring-reset type third directional valve, the second directional valve has a spring-reset valve body, the detection directional unit is a spring-reset type collision valve with collision directional function, the oil inlet of the collision valve is connected to the oil inlet of the drilling motor, and the oil outlet is connected to the hydraulic control port of the second directional valve and the return oil line respectively. A throttling orifice is provided on the pipeline connecting the oil outlet of the collision valve and the return oil line. A first auxiliary valve group is provided on the oil inlet of the feed cylinder. The first auxiliary valve group includes a first check valve, a hydraulic control check valve, and an overflow valve. A relief valve is connected in parallel to the oil inlet of the feed cylinder. The oil inlet of the relief valve is connected to the rodless chamber of the feed cylinder through the hydraulically controlled check valve. The hydraulically controlled check valve is located on the side of the first check valve closer to the feed cylinder. The hydraulically controlled port of the hydraulically controlled check valve is connected to the oil outlet of the feed cylinder. The oil inlet between the first check valve and the hydraulically controlled check valve is connected to the P port of the third directional valve. The hydraulically controlled port of the third directional valve is connected to the B port of the second directional valve. The B port of the third directional valve is connected to the oil outlet of the collision valve. The T port of the third directional valve is not connected to the return oil path.

[0008] Preferably, the oil outlet of the collision valve is connected to the oil inlet of the drilling motor through a second one-way valve.

[0009] Preferably, the first auxiliary valve assembly is connected to the oil port of the automatic feed directional valve via a flange face.

[0010] Preferably, the first reversing valve, the second reversing valve, and the third reversing valve are disposed on an automatic control intermediate block, which is connected in series between the automatic feed reversing valve and the motor rotation reversing valve.

[0011] Preferably, the triple multi-way valve group further includes a spring-reset manual feed directional valve with handle control function. The P port of the manual feed directional valve is connected to the oil pump, the A port is connected to the rodless chamber of the feed cylinder, and the B port is connected to the rod chamber of the feed cylinder. A dual-control directional valve for switching between manual and hydraulic control is provided at the front end of the pilot control oil circuit. The P port and A port of the dual-control directional valve are respectively connected to the pilot control oil circuit.

[0012] Preferably, a throttling orifice is provided in the pilot control oil line connected to port A of the dual-control directional valve.

[0013] Preferably, the dual-control directional valve is a spring-reset type directional valve with handle control function.

[0014] Preferably, the dual-control directional valve is connected to the mounting surface of the automatic feed directional valve via a flange face.

[0015] Preferably, the triple multi-way valve group further includes a connecting block, which is connected in series with the manual feed directional valve. The connecting block is provided with an oil inlet for the pilot control oil circuit, an oil inlet for the main oil supply circuit, and an oil return circuit.

[0016] The present invention achieves the following main technical effects compared to the prior art:

[0017] By pushing the push rod of the automatic feed directional valve as a one-button start command, hydraulic oil is supplied to the feed cylinder. Simultaneously, a portion of the hydraulic oil is used to drive the first directional valve to switch. At this time, the P and B ports of the first directional valve are connected. Pilot control oil can be supplied to the automatic feed directional valve, motor rotary directional valve, and water spray directional valve through the second directional valve and the first directional valve, achieving automatic drilling while simultaneously spraying water. When the feed cylinder reaches its extended end, the detection directional unit detects and switches the first and second directional valves. Pilot control oil drives the automatic feed directional valve to switch through port B of the second directional valve, and the feed cylinder begins to retract. Hydraulic oil in the start-side hydraulic control ports of the automatic feed directional valve, motor rotary directional valve, and water spray directional valve flows through the first directional valve... Oil is discharged through ports B and T. The motor rotation reversing valve and water spray reversing valve return to their original positions, achieving automatic return. When the feed cylinder reaches the retraction end, the second reversing valve reverses, and the hydraulic control port of the automatic feed reversing valve discharges oil through ports B and T of the second reversing valve. The automatic feed reversing valve resets, stopping the machine and waiting for the next push rod of the automatic feed reversing valve. That is, by pushing the push rod of the automatic feed reversing valve, automatic drilling, drilling water spraying, automatic return to stop and wait to start the next automatic drilling process can be achieved. The operator only needs to perform one operation, which reduces the labor intensity of the operator, improves the safety of the operator, and avoids the problems of low operation and poor construction quality caused by operator fatigue due to high labor intensity.

[0018] Other solutions of the present invention achieve the following technical effects compared with the prior art:

[0019] The hydraulic oil generated by unloading oil in the rodless chamber of the feed cylinder can be supplied to the drilling motor through the second check valve, so that the drilling motor also has a certain speed during the return process, thereby improving the protection effect on the drill bit.

[0020] The dual-control directional valve allows switching between automatic one-button operation and manual operation, and enables emergency stop during automatic one-button operation. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a hydraulic schematic diagram of the fully automatic drilling multi-way valve system of the hydraulic anchor drilling rig of the present invention in the shutdown state;

[0023] Figure 2 This is a hydraulic path diagram of the drilling and water spraying state of the present invention;

[0024] Figure 3 This is a hydraulic path diagram of the collision valve at the moment of triggering according to the present invention;

[0025] Figure 4 This is a hydraulic path diagram for the automatic return state of the present invention;

[0026] Figure 5 This is a front structural diagram of the fully automatic drilling multi-way valve system of the hydraulic anchor drilling rig of the present invention;

[0027] Figure 6 This is a schematic diagram of the back of the fully automatic drilling multi-way valve system of the hydraulic anchor drilling rig of the present invention;

[0028] Figure 7 This is a hydraulic schematic diagram of the connecting block of the present invention;

[0029] Figure 8 This is a hydraulic schematic diagram of the manual feed directional valve of the present invention;

[0030] Figure 9 This is a hydraulic schematic diagram of the automatic feed reversing valve of the present invention;

[0031] Figure 10 This is a schematic diagram of the hydraulic principle at the automatic control intermediate block of the present invention;

[0032] Figure 11 This is a hydraulic schematic diagram of the motor rotary reversing valve of the present invention;

[0033] Figure 12 This is a hydraulic schematic diagram of the water spray control tailplate of the present invention;

[0034] Figure 13 This is a hydraulic schematic diagram of the first auxiliary valve group of the present invention;

[0035] Figure 14 This is a hydraulic schematic diagram of the second auxiliary valve assembly of the present invention;

[0036] The components include: 1. Connecting block; 2. Manual feed directional valve; 3. Automatic feed directional valve; 4. Automatic control intermediate block; 5. Motor rotation directional valve; 6. Water spray control tailplate; 7. Water spray directional valve; 8. Feed cylinder; 9. Drilling motor; 10. Water spray valve; 11. Oil pump; 12. First directional valve; 13. Second directional valve; 14. Third directional valve; 15. Collision valve; 16. First check valve; 17. Hydraulic check valve; 18. Overflow valve; 19. Second check valve; 20. Dual-control directional valve; 21. Pressure reducing valve; 22. Three-way multi-port valve group; 23. First auxiliary valve group; 24. Second auxiliary valve group. Detailed Implementation

[0037] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. 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.

[0038] The purpose of this invention is to provide a fully automatic drilling multi-way valve system for hydraulic anchor drilling rigs to solve the problems existing in the prior art. By adding a set of control valve blocks to form a logic control system, it can realize one-button operation to complete automatic drilling, drilling water spraying, and automatic return to stop and wait for the next automatic drilling process. This can effectively reduce the operator's workload, thereby improving safety, construction efficiency and construction quality.

[0039] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0040] Please refer to the following: Figures 1-14As shown, a fully automatic drilling multi-way valve system for a hydraulic anchor drilling rig is provided, including a three-way multi-way valve assembly 22, a first reversing valve 12, a second reversing valve 13, and a detection reversing unit. The first reversing valve 12 is a spring-reset type reversing valve. The detection reversing unit is used to detect when the feed cylinder 8 reaches its endpoint and control the second reversing valve 13 to reverse. The three-way multi-way valve assembly 22 includes an automatic feed reversing valve 3 for controlling the extension and retraction of the feed cylinder 8 and having a push rod reversing function, a motor rotation reversing valve 5 for controlling the rotation direction of the drilling motor 9, and a water spray reversing valve 7 for controlling the opening and closing of the water spray valve. The automatic feed reversing valve 3, the motor rotation reversing valve 5, and the water spray reversing valve 7 all have handle control functions. The spring-reset type directional valve has its oil tank connected to the P port of the automatic feed directional valve 3, the motor rotary directional valve 5, and the water spray directional valve 7 via the oil pump 11. The pilot control oil circuit sequentially passes through the P port of the second directional valve 13, the A port of the second directional valve 13, the P port of the first directional valve 12, and the B port of the first directional valve 12, respectively, and is connected to the start-side hydraulic control ports of the automatic feed directional valve 3, the motor rotary directional valve 5, and the water spray directional valve 7. The B port of the second directional valve 13 is connected to the return-side hydraulic control port of the automatic feed directional valve 3. The oil inlet of the rodless chamber of the feed cylinder 8 is connected to the hydraulic control port of the first directional valve 12. The A port of the first directional valve 12 is connected to the return oil circuit (R). Both the T-ports of the first directional valve 12 and the second directional valve 13 are connected to the return oil circuit. Pushing the push rod of the automatic feed directional valve 3 serves as a one-button start command. While hydraulic oil is supplied to the feed cylinder 8, a portion of the hydraulic oil is used to drive the first directional valve 12 to switch. At this time, the P and B ports of the first directional valve 12 are connected. Pilot control oil can be supplied through the second directional valve 13 and the first directional valve 12 to the automatic feed directional valve 3, the motor rotation directional valve 5, and the water spray directional valve 7, enabling automatic drilling while simultaneously spraying water. The pilot control oil supplied to the start side of the automatic feed directional valve 3 ensures that the automatic feed directional valve 3 will not return due to the spring force. When the feed cylinder 8 reaches the extension end... When the detection reversing unit detects and reversing the first reversing valve 12 and the second reversing valve 13, the pilot control oil drives the automatic feed reversing valve 3 to reversing through the B port of the second reversing valve 13. The feed cylinder 8 begins to retract, and the hydraulic oil in the start-side hydraulic control ports of the automatic feed reversing valve 3, the motor rotation reversing valve 5, and the water spray reversing valve 7 is discharged through the B port and the T port of the first reversing valve 12. The motor rotation reversing valve 5 and the water spray reversing valve 7 return to their original positions, realizing automatic return. A return spring is set in the rod chamber of the water spray valve port. When the water spray reversing valve 7 returns to its original position, the rodless chamber of the water spray valve port is discharged, the piston rebounds under the action of the return spring, and the water spray valve 10 closes, that is, the water spraying stops when the automatic return occurs.When the feed cylinder 8 reaches the retraction end, the second directional valve 13 reverses, and the hydraulic control port of the automatic feed directional valve 3 discharges oil through the B and T ports of the second directional valve 13. The automatic feed directional valve 3 resets, stopping the machine and waiting for the next push rod of the automatic feed directional valve 3. That is, by pushing the push rod of the automatic feed directional valve 3, automatic drilling, drilling water spraying, and automatic return to stop waiting to start the next automatic drilling process can be achieved. The operator only needs to perform one operation, reducing the labor intensity of the operator, improving the safety of the operator, and avoiding the problems of low operation and poor construction quality caused by operator fatigue due to high labor intensity.

[0041] The motor rotary reversing valve 5 adopts a standard electro-proportional control reversing valve with C-type pressure limiting, and uses different proportional pressure reducing valves 21 plugs. The return side (i.e., the handle side) is connected to the return oil circuit (T), and its start-up hydraulic control port is connected to the spring chamber. The spring chamber is connected to the pilot control oil circuit (Z).

[0042] The detection reversing unit can be electrically controlled or hydraulically controlled. In the case of electrical control, the second reversing valve 13 is an electromagnetic reversing valve. The sensor detects the movement of the piston in the feed cylinder 8. When the piston reaches the end point, it sends an electrical signal to the control system. The control system then controls the second reversing valve 13 to reverse. The sensor can be a pressure sensor installed in the chamber of the feed cylinder 8. Pressure sensors are installed on the walls of the rodless chamber and the rod chamber away from the piston to detect the piston's position.

[0043] When the detection unit is selected as hydraulically controlled, the fully automatic drilling multi-way valve system of the hydraulic anchor drilling rig also includes a spring-return type third directional valve 14, a second directional valve 13 with a spring-return valve body, and a detection directional unit that is a spring-return type collision valve 15 with collision directional function. The oil inlet of the collision valve 15 is connected to the oil inlet of the drilling motor 9, and the oil outlet is connected to the hydraulic control port of the second directional valve 13 and the return oil line, respectively. A Ø0.6mm throttling orifice is provided on the pipeline connecting the oil outlet of the collision valve 15 and the return oil line. A first auxiliary valve group 23 is provided on the oil inlet of the feed cylinder 8. The auxiliary valve assembly 23 includes a first check valve 16, a hydraulically controlled check valve 17, and a relief valve 18. The first check valve 16 and the relief valve 18 are connected in parallel in the oil inlet path of the feed cylinder 8. The oil inlet of the relief valve 18 is connected to the rodless chamber of the feed cylinder 8 through the hydraulically controlled check valve 17. The hydraulically controlled check valve 17 is located on the side of the first check valve 16 closer to the feed cylinder 8. The hydraulically controlled port of the hydraulically controlled check valve 17 is connected to the oil outlet of the feed cylinder 8. The oil inlet path between the first check valve 16 and the hydraulically controlled check valve 17 is connected to the P port of the third directional valve 14. The hydraulically controlled port of the third directional valve 14 is connected to the first... The B port of the second directional valve 13 is connected, and the B port of the third directional valve 14 is connected to the oil outlet of the collision valve 15. The T port of the third directional valve 14 is not connected to the return oil circuit. When the collision end of the collision valve 15 collides and moves to the distance required to switch the third directional valve 14, the piston of the feed cylinder 8 reaches the extension end. Due to the presence of the throttle orifice on the return oil circuit, at this time, part of the hydraulic oil in the inlet of the drilling motor 9 enters the hydraulic control port of the second directional valve 13 through the collision valve 15 to control the second directional valve 13 to switch, and part of the oil is discharged from the return oil circuit. After the second directional valve 13 switches, the PB port is connected, and the pilot... Control oil enters the hydraulic control port of the automatic feed directional valve 3 and the third directional valve 14 through port B, causing them to switch directions. The feed cylinder 8 begins to retract, and the oil inlet circuit begins to unload oil. Due to the presence of the overflow valve 18 and the hydraulic control check valve 17, the unloaded oil from the rodless chamber enters the P port of the third directional valve 14, and then enters the outlet oil path of the collision valve 15 through the B port of the third directional valve 14 to continue providing pressure so that the second directional valve 13 remains in the switched state. When the oil in the rodless chamber of the feed cylinder 8 is completely unloaded, there is no oil supply to the outlet oil path of the collision valve 15, the second directional valve 13 and the third directional valve 14 reset, and the entire machine stops.

[0044] During the oil unloading process of the feed cylinder 8, the return spring of the collision valve 15 will reset it, and the oil outlet and oil inlet are not connected. Therefore, the oil outlet of the collision valve 15 can be connected to the oil inlet of the drilling motor 9 through the second check valve 19, so that the oil unloading part of the rodless chamber of the feed cylinder 8 will enter the drilling motor 9 and maintain a certain speed, thereby improving the protection effect on the drill bit.

[0045] To improve structural compactness, the first auxiliary valve group 23 is connected to the oil port of the automatic feed directional valve 3 through the flange face. The first directional valve 12, the second directional valve 13 and the third directional valve 14 are set on the automatic control intermediate block 4. The automatic control intermediate block 4 is connected in series between the automatic feed directional valve 3 and the motor rotation directional valve 5.

[0046] The first directional valve 12, the second directional valve 13, and the third directional valve 14 can be two-position or three-position valves. The oil ports are not fixed to PTAB; other oil ports can be added. The oil ports are sealed when not in use, with the aim of enabling the switching required by this application.

[0047] In this embodiment, the first reversing valve 12 and the second reversing valve 13 can have the same function and model. In order to reduce the reversing impact, the spring cavity should be internally connected to the return oil T, and a Ø0.8mm 0.8 throttle orifice should be installed at the control oil port. The third reversing valve 14 has the same valve core function as the first reversing valve 12 and the second reversing valve 13. The spring cavity should be internally connected to the return oil T port.

[0048] The triple multi-way valve assembly 22 also includes a spring-return manual feed directional valve 2 with handle control function. The P port of the manual feed directional valve 2 is connected to the oil pump 11, the A port is connected to the rodless chamber of the feed cylinder 8, and the B port is connected to the rod chamber of the feed cylinder 8. A double-control directional valve 20 for switching between manual and hydraulic control is provided at the front end of the pilot control oil circuit. The P port and A port of the double-control directional valve 20 are respectively connected to the pilot control oil circuit. The double-control directional valve 20 can be controlled by electromagnetic or manual control.

[0049] When manually controlled, the dual-control directional valve 20 is a spring-reset type directional valve with handle control function. The spring chamber must be internally connected to the return oil T port. The dual-control directional valve 20 can switch between automatic one-button operation and manual operation, and can realize emergency stop in automatic one-button operation.

[0050] A pilot control oil circuit connected to port A of the dual-control directional valve 20 is provided with an oil circuit connected to the hydraulic control port on the handle side of the dual-control directional valve 20 to maintain the state of the dual-control directional valve 20. A Ø0.8mm throttling orifice is provided on the pilot control oil circuit connected to port A of the dual-control directional valve 20 so that when the feed cylinder 8 returns to the bottom, there is no flow from port P to port B in the third directional valve 14, there is no pressure in the control oil of the second directional valve 13, the second directional valve 13 resets, the hydraulic control oil pressure on the handle side of the dual-control directional valve 20 drops to zero, the dual-control directional valve 20 resets under the action of the spring, and the entire hydraulic system is in standby state.

[0051] To improve structural compactness, the dual-control directional valve 20 and the throttle orifice form a second auxiliary valve group 24, which is connected to the mounting surface of the automatic feed directional valve 3 via a flange face.

[0052] The triple multi-way valve assembly 22 also includes a connecting block 1, which is connected in series with the manual feed directional valve 2. The connecting block 1 is provided with an oil inlet for the pilot control oil circuit, an oil inlet for the main oil supply circuit, and an oil return circuit. The connecting block 1 can also be provided with oil ports that can be connected to other hydraulically controlled devices of the drilling rig. When needed, the oil circuit of the device can be connected to the oil ports of the connecting block 1. The water spray directional valve 7 is provided on the water spray control tail plate 6, which is connected in series with the motor rotation directional valve 5.

[0053] Pressure reducing valves 21 are installed on the oil inlet line of the water spray reversing valve 7 to control the oil pressure.

[0054] In actual use, when starting automatic drilling, pushing up the handle of the dual-control directional valve 20 switches to automatic mode. Simultaneously, pushing up the handle of the automatic feed directional valve 3 causes the main valve core of the automatic feed directional valve 3 to move upwards. The main oil supply P flows through port A of the automatic feed directional valve 3 into the first check valve 16 and the hydraulically controlled check valve 17, entering the rodless chamber of the feed cylinder 8. Simultaneously, one oil path is drawn from port A of the main valve core of the automatic feed directional valve 3, flowing into the hydraulically controlled port of the first directional valve 12, causing the valve core to move to the right, thus connecting port P and port B of the first directional valve 12. At the same time, the pilot control oil flowing from the three-way pressure reducing valve 21 on the connecting block 1 flows out from port A of the dual-control directional valve 20, flowing into the right hydraulically controlled port of the dual-control directional valve 20, maintaining its valve core in a leftward-moving state. Simultaneously, pilot control oil flows out from port A of the second directional valve 13, flows through port B of the first directional valve 12 into the start-side hydraulic control port of the automatic feed directional valve 3 and the motor rotation directional valve 5, keeping the main valve core of the automatic feed directional valve 3 and the motor rotation directional valve 5 in place. The main oil supply P flows through port A of the automatic feed directional valve 3 and the motor rotation directional valve 5 into the rodless chamber of the feed cylinder 8 and the forward rotation port of the motor, respectively, starting automatic feed and automatic drilling. At the same time, pilot control oil flows out from port A of the double-control directional valve 20 into the hydraulic control port of the water spray directional valve 7, causing the valve core to move upward. The P port of the water spray directional valve 7 connects with the A port. The main oil supply P flows through the water spray directional valve 7 into the rodless chamber of the water spray valve 10, and the water spray valve 10 opens to automatically spray water.

[0055] When the feed cylinder 8 reaches its apex and triggers the collision valve 15, pressurized oil flows through the collision valve 15 into the hydraulic control port of the second directional valve 13, causing the valve core to move to the right. The P port of the second directional valve 13 connects with the B port. The pilot control oil flowing from the dual-control directional valve 20 flows from the B port of the second directional valve 13 into the hydraulic control port of the third directional valve 14 and the return side hydraulic control port of the automatic feed directional valve 3, causing them to switch directions respectively. The main valve core of the automatic feed directional valve 3 moves down, and the A port of the automatic feed directional valve 3, the hydraulic control port of the first directional valve 12, and the main return oil R are connected. The first directional valve 12 resets, and the B port of the first directional valve 12 connects with the T port. The motor rotates the hydraulic control ports of the directional valve 5 and the water spray directional valve 7, pressurizing them. When the force drops to zero, the valve cores of the motor rotation reversing valve 5 and the water spray reversing valve 7 reset simultaneously. At this time, the feed cylinder 8 returns, the water spray valve 10 closes, and when the automatic feed cylinder 8 returns, the motor rotation reversing valve 5 is also in the neutral position. The hydraulic oil in the rodless chamber of the feed cylinder 8 reaches the oil inlet of the overflow valve 18 through the hydraulic control check valve 17, and at the same time reaches the motor forward rotation oil port through the third reversing valve 14 and the second check valve 19. The motor slowly rotates forward until the automatic push cylinder returns to the bottom and the motor stops rotating. At this time, all reversing valve operating handles are reset and the machine stops automatically, waiting to start the next automatic drilling process. The pressure of the overflow valve 18 controls the speed at which the feed cylinder 8 returns and the motor rotates.

[0056] In case of emergency stop / interruption of automatic drilling, pull down the handle of the dual-control directional valve 20 to reset. When the drilling is stopped in the emergency, the automatic feed directional valve 3, the motor rotation directional valve 5, and the water spray directional valve 7 will reset simultaneously, stopping drilling and entering standby mode. When the return is stopped in the emergency, the third directional valve 14 and the automatic feed directional valve 3 will reset simultaneously, followed by the second directional valve 13, stopping the drilling rig from returning and entering standby mode.

[0057] In addition to automatic drilling, pulling down the double-control directional valve 20 handle switches to manual mode, allowing normal operation of the manual feed directional valve 2 to control the forward and backward movement of the feed cylinder 8. It can also directly control the motor rotation directional valve 5 to control the forward and reverse rotation of the drilling rig motor.

[0058] When drilling automatically, the automatic feed flow rate can be adjusted. The function and flow rate code of the automatic feed valve core is F10 / 25. The maximum automatic feed flow rate is 10L / min. The flow rate during automatic feed can be adjusted by adjusting the valve core limit. Generally, for hard rock, the flow rate should be set at 3-5L / min, and for soft rock, the flow rate should be set at 6-8L / min.

[0059] Any adaptive changes made according to actual needs are within the scope of protection of this invention.

[0060] It should be noted that, for those skilled in the art, it is obvious that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0061] Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this invention. Furthermore, those skilled in the art will recognize that, based on the ideas of this invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this invention.

Claims

1. A fully automatic drilling multi-way valve system for a hydraulic anchor bolt drilling rig, characterized in that, The system includes a three-way multi-port valve assembly, a spring-return type first directional valve, a second directional valve, and a detection and reversing unit for detecting when the feed cylinder reaches its endpoint and controlling the second directional valve to reverse. The three-way multi-port valve assembly includes an automatic feed directional valve with pushrod reversing function for controlling the extension and retraction of the feed cylinder, a motor rotation directional valve for controlling the rotation direction of the drilling motor, and a water spray directional valve for controlling the opening and closing of the water spray valve. The automatic feed directional valve, the motor rotation directional valve, and the water spray directional valve are all spring-return type directional valves with handle control function. The oil tank is connected to the automatic feed directional valve, the motor rotation directional valve, and the water spray directional valve respectively via an oil pump. The pilot control oil circuit passes sequentially through the P port of the automatic feed reversing valve, the motor rotary reversing valve, and the water spray reversing valve, and is connected to the start-side hydraulic control port of the automatic feed reversing valve, the motor rotary reversing valve, and the water spray reversing valve, respectively, via the P port of the second reversing valve, the A port of the second reversing valve, the P port of the first reversing valve, and the B port of the first reversing valve. The B port of the second reversing valve is connected to the return-side hydraulic control port of the automatic feed reversing valve. The rodless chamber oil inlet of the feed cylinder is connected to the hydraulic control port of the first reversing valve. The A port of the first reversing valve is connected to the return oil circuit. The fully automatic drilling multi-way valve system of the hydraulic anchor bolt drilling rig also includes a spring-reset type third directional valve. The second directional valve has a spring-reset valve body. The detection directional valve unit is a spring-reset type collision valve with collision directional function. The oil inlet of the collision valve is connected to the oil inlet of the drilling motor, and the oil outlet is connected to the hydraulic control port of the second directional valve and the return oil line, respectively. A throttling orifice is provided on the pipeline connecting the oil outlet of the collision valve and the return oil line. A first auxiliary valve group is provided on the oil inlet of the feed cylinder. The first auxiliary valve group includes a first check valve, a hydraulic control check valve, and an overflow valve. The first check valve is connected to the... The overflow valve is connected in parallel to the oil inlet of the feed cylinder. The oil inlet of the overflow valve is connected to the rodless chamber of the feed cylinder through the hydraulically controlled check valve. The hydraulically controlled check valve is located on the side of the first check valve closer to the feed cylinder. The hydraulically controlled port of the hydraulically controlled check valve is connected to the oil outlet of the feed cylinder. The oil inlet between the first check valve and the hydraulically controlled check valve is connected to the P port of the third directional valve. The hydraulically controlled port of the third directional valve is connected to the B port of the second directional valve. The B port of the third directional valve is connected to the oil outlet of the collision valve. The T port of the third directional valve is not connected to the return oil circuit.

2. The fully automatic drilling multi-way valve system for hydraulic anchor bolt drilling rigs according to claim 1, characterized in that, The oil outlet of the collision valve is connected to the oil inlet of the drilling motor through a second check valve.

3. The fully automatic drilling multi-way valve system for hydraulic anchor bolt drilling rigs according to claim 1, characterized in that, The first auxiliary valve assembly is connected to the oil port of the automatic feed directional valve via a flange face.

4. The fully automatic drilling multi-way valve system for hydraulic anchor bolt drilling rigs according to claim 1, characterized in that, The first reversing valve, the second reversing valve, and the third reversing valve are mounted on an automatic control intermediate block, which is connected in series between the automatic feed reversing valve and the motor rotation reversing valve.

5. The fully automatic drilling multi-way valve system for hydraulic anchor bolt drilling rigs according to claim 1, characterized in that, The triple multi-way valve group also includes a spring-reset manual feed directional valve with handle control function. The P port of the manual feed directional valve is connected to the oil pump, the A port is connected to the rodless chamber of the feed cylinder, and the B port is connected to the rod chamber of the feed cylinder. A dual-control directional valve for switching between manual and hydraulic control is provided at the front end of the pilot control oil circuit. The P port and A port of the dual-control directional valve are respectively connected to the pilot control oil circuit.

6. The fully automatic drilling multi-way valve system for hydraulic anchor bolt drilling rigs according to claim 5, characterized in that, A throttling orifice is provided on the pilot control oil line connected to port A of the dual-control directional valve.

7. The fully automatic drilling multi-way valve system for hydraulic anchor bolt drilling rigs according to claim 5, characterized in that, The dual-control directional valve is a spring-reset type directional valve with handle control function.

8. The fully automatic drilling multi-way valve system for hydraulic anchor bolt drilling rigs according to claim 5, characterized in that, The dual-control directional valve is connected to the mounting surface of the automatic feed directional valve via a flange face.

9. The fully automatic drilling multi-way valve system for hydraulic anchor bolt drilling rigs according to claim 5, characterized in that, The triple multi-way valve group also includes a connecting block, which is connected in series with the manual feed directional valve. The connecting block is provided with an oil inlet for the pilot control oil circuit, an oil inlet for the main oil supply circuit, and an oil return circuit.

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