Switching valve, digital valve group and intelligent drilling machine multi-mechanism control hydraulic system

Abstract

The utility model discloses a switching valve, a digital valve group and an intelligent drilling machine multi-mechanism control hydraulic system. Comprising a main pump, a cooler, a high-pressure filter, an oil return pressure gauge, a digital main valve group, a system pressure gauge, a motor displacement regulating valve, a hydraulic control gyrator motor, a feeding oil cylinder, a left crawler motor, a right crawler motor, an auxiliary action LS overflow valve, a digital valve group, an electro-hydraulic switching valve, a switching valve group, a shackle oil cylinder, a lower stable oil cylinder I, a machine body inclination angle motor and a lower stable oil cylinder II, and the clamping device oil cylinder and the translation oil cylinder are arranged. According to the one-link switching valve, a one-link digital valve can control two execution elements, the number of hydraulic system valve sets is reduced, and a hydraulic system is simplified; the cost is reduced; by accurately controlling the output flow of each path of the digital valve, accurate control over the speed of an execution element is achieved, it is guaranteed that the drilling process of the intelligent drilling machine is efficient and stable, and optimal balance between energy consumption and efficiency can be achieved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of hydraulic system of coal mine underground tunnel drilling equipment, and relates to a hydraulic system controlled by switching valve and digital valve. BACKGROUND

[0002] With the development of automation and intelligence of the coal mine drilling equipment, the hydraulic system as the core control system of the drilling rig provides the drilling rig with continuous power and accurate control, so that the drilling rig can work efficiently and stably in the complex geological environment.

[0003] The traditional hydraulic drive and control system of the drilling rig is designed with a direction control circuit (such as a reversing circuit, a locking circuit, a braking circuit, etc.), a force control circuit (such as a pressure regulating circuit, a pressure reducing circuit, etc.), and a speed control circuit (such as a throttling speed regulating circuit). The whole hydraulic system is complex, has many fault points, and has low control precision. The displacement of the valve core of the ordinary valve group of the traditional hydraulic system of the drilling rig has no feedback, the valve core adjusts the flow in a large range, the displacement error of the hydraulic element is large, the stability and service life of the drilling rig are affected, the energy consumption efficiency of the drilling rig needs to be improved, and the high-precision control required by the intelligent drilling rig is inconsistent. SUMMARY

[0004] In view of the problems in the prior art, the utility model aims to provide a switching valve, a digital valve group, and a multi-mechanism control hydraulic system of an intelligent drilling rig, so as to solve the problems of the traditional hydraulic system of the coal mine drilling rig, such as complexity, many fault points, low control precision, poor stability, and low energy consumption efficiency.

[0005] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0006] A switching valve, a digital valve group, and a multi-mechanism control hydraulic system of an intelligent drilling rig, comprising a main pump, a cooler, a high-pressure filter, an oil return pressure gauge, a digital main valve group, a system pressure gauge, a motor displacement adjusting valve, a hydraulic control rotary motor, a feeding oil cylinder, a left track motor, a right track motor, an auxiliary action LS overflow valve, a digital valve group, an electro-hydraulic switching valve, a switching valve group, an unhooking device oil cylinder, a lower stability I oil cylinder, a machine body inclination motor, a lower stability II oil cylinder, a gripper oil cylinder, and a translation oil cylinder.

[0007] The oil outlet of the main pump is connected with the oil inlet of the high-pressure filter, one end of the three-way oil outlet of the high-pressure filter is connected with the oil inlet of the digital main valve group, and the system pressure gauge is connected with the pressure measuring port of the digital main valve group through a pressure measuring line. The high-pressure oil discharged by the main pump enters the digital main valve group through the high-pressure filter, and the system pressure gauge displays the real-time working pressure of the digital main valve group.

[0008] The first connection of the digital main valve group controls the forward and reverse rotation of the hydraulic control rotary motor, the second connection controls the fast feeding / pulling of the feeding oil cylinder, the third connection controls the slow feeding / pulling of the feeding oil cylinder, the fourth connection controls the left track motor, and the fifth connection controls the right track motor.

[0009] The other end of the high-pressure filter tee oil outlet is connected with the oil inlet of the digital valve group, the working oil port of each connection of the digital valve group is connected with the oil inlet of each connection of the switching valve group, and each connection of the switching valve group can be connected with the unhooking cylinder, the lower stability I cylinder, the machine body inclination motor, the lower stability II cylinder, the gripper cylinder and the translation cylinder.

[0010] The remote control port of the digital valve group is connected with the oil inlet of the electro-hydraulic switching valve, the oil outlet of the electro-hydraulic switching valve is connected with the remote control port of the switching valve group, the switching valve group can control the unhooking cylinder, the machine body inclination motor and the gripper cylinder to work when the left position is connected, and the electro-hydraulic switching valve can control the lower stability I cylinder, the lower stability II cylinder and the translation cylinder to work when the switching valve group is switched to the right position.

[0011] The utility model also includes the following technical features:

[0012] Specifically, the drain ports of the digital valve group, the electro-hydraulic switching valve, the switching valve group and the digital main valve group are directly connected with the oil tank through rubber pipes.

[0013] Specifically, the oil return ports of the digital valve group and the switching valve group are connected with the oil inlet of the cooler through rubber pipes, and the oil outlet of the cooler is connected with the oil tank through a rubber pipe.

[0014] Specifically, one end of the motor displacement adjusting valve is connected with the remote control oil port of the hydraulic control rotary motor, the other end is connected with the remote control port of the digital main valve group, and the drain port of the motor displacement adjusting valve is connected with the oil tank; the motor displacement adjusting valve can electrically control the displacement of the hydraulic control rotary motor, so as to meet the requirements of the automatic drilling construction rotation speed of the intelligent drilling machine.

[0015] Specifically, the oil return pressure gauge is arranged on the oil return pipeline of the digital main valve group.

[0016] Specifically, the auxiliary action LS overflow valve is arranged on the LS feedback oil ports of the digital main valve group and the digital valve group.

[0017] Specifically, a pull rope displacement sensor is arranged on the feeding oil cylinder to feed the speed and displacement of the feeding oil cylinder to the intelligent drilling machine.

[0018] Specifically, the intelligent drilling machine comprises a main machine and an explosion-proof motor, an oil tank and a control platform frame arranged on a track vehicle body;

[0019] The main pump is connected with the explosion-proof motor through a shaft coupling and bolts; the hydraulic control rotary motor, the feeding oil cylinder, the unhooking cylinder, the machine body inclination motor, the gripper cylinder and the translation cylinder are screwed on the main machine.

[0020] Specifically, the high-pressure filter is screwed on the side of the oil tank; the oil return pressure gauge, the digital main valve group, the system pressure gauge, the motor displacement adjusting valve and the electro-hydraulic switching valve are screwed on the console frame.

[0021] Specifically, the explosion-proof motor and the cooler are screwed on the tracked vehicle body; the digital valve group, the switching valve group and the console frame are screwed on the tracked vehicle body; the left track motor, the right track motor, the lower stabilizing I oil cylinder and the lower stabilizing II oil cylinder are screwed on the side of the tracked vehicle body.

[0022] Compared with the prior art, the utility model has the following technical effects:

[0023] The switching valve can switch between front and rear positions, control each digital valve to realize the control of two-way executing mechanisms, effectively reduce the number of digital valves, and save space and reduce cost.

[0024] The one-association switching valve can realize the control of two executing mechanisms by one-association digital valve, reduces the number of valve groups of the hydraulic system, simplifies the hydraulic system, and reduces cost. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 It is a whole structure schematic view of the utility model.

[0026] The meanings of the various reference numerals in the drawing are as follows:

[0027] 1. main pump, 2. cooler, 3. high-pressure filter, 4. oil return pressure gauge, 5. digital main valve group, 6. system pressure gauge, 7. motor displacement adjusting valve, 8. hydraulic control rotator motor, 9. feeding oil cylinder, 10. left track motor, 11. right track motor, 12. auxiliary action LS overflow valve, 13. digital valve group, 14. electro-hydraulic switching valve, 15. switching valve group, 16. unhooking device oil cylinder, 17. lower stabilizing I oil cylinder, 18. machine body inclination motor, 19. lower stabilizing II oil cylinder, 20. gripper oil cylinder, 21. translation oil cylinder. DETAILED DESCRIPTION

[0028] The following are specific embodiments of the present invention. It should be noted that the present invention is not limited to the following specific embodiments. All equivalent modifications made based on the technical solutions of this application fall within the protection scope of the present invention.

[0029] Example 1:

[0030] like Figure 1 As shown, this embodiment provides a switching valve, digital valve group, and intelligent drilling rig multi-mechanism control hydraulic system, including a main pump 1, cooler 2, high-pressure filter 3, return oil pressure gauge 4 (pressure sensor), digital main valve group 5, system pressure gauge 6 (pressure sensor), motor displacement regulating valve 7, hydraulically controlled rotary motor 8, feed cylinder 9, left track motor 10, right track motor 11, auxiliary action LS overflow valve 12, digital valve group 13, electro-hydraulic switching valve 14, switching valve group 15, unhooking cylinder 16, lower stabilizing I cylinder 17, body tilt motor 18, lower stabilizing II cylinder 19, clamping cylinder 20, and translation cylinder 21; the digital main valve group 5 and digital valve group 13 are digital valves, which can be controlled by remote control buttons and valve handles.

[0031] The oil outlet of the main pump 1 is connected to the oil inlet of the high-pressure filter 3 via a rubber hose. One end of the oil outlet of the high-pressure filter 3 is connected to the oil inlet of the digital main valve group 5 via a rubber hose. The system pressure gauge 6 (pressure sensor) is connected to the pressure measuring port of the digital main valve group 5 via a pressure measuring wire. The motor drives the main pump 1 to work, and the discharged high-pressure oil enters the digital main valve group 5 through the high-pressure filter 3. The system pressure gauge 6 (pressure sensor) displays the real-time working pressure of the digital main valve group 5.

[0032] The operation of the digital main valve group 5 is controlled by the remote control button or the handle of the digital main valve group 5 (the handle is generally used for debugging or troubleshooting). The first link of the digital main valve group 5 controls the forward and reverse rotation of the hydraulic rotary motor 8. The motor displacement regulating valve 7 can electrically regulate the displacement of the hydraulic rotary motor 8 to meet the automatic drilling construction needs of the intelligent drilling rig. The second link controls the rapid feed / pull-out function of the feed cylinder 9 to meet the rapid feed / pull-out function when the intelligent drilling rig adds or removes rods. The third link controls the slow feed / pull-out function of the feed cylinder 9 to meet the feed / pull-out speed when the intelligent drilling rig is drilling. The fourth link controls the left track motor 10 to control the forward and backward movement of the left track of the intelligent drilling rig. The fifth link controls the right track motor 11 to control the forward and backward movement of the right track of the intelligent drilling rig. The left track motor 10 and the right track motor 11 work together to realize the forward, backward and turning functions of the intelligent drilling rig.

[0033] The other end of the three-way oil outlet of the high-pressure filter 3 is connected to the oil inlet of the digital valve group 13 via a high-pressure hose. Each working oil port of the digital valve group 13 is connected to each oil inlet of the switching valve group 15 via a hose. Each of the two oil outlets of the switching valve group 15 can be connected to the release cylinder 16, the lower stabilizing cylinder I 17, the body tilt motor 18, the lower stabilizing cylinder II 19, the clamping cylinder 20, and the translation cylinder 21 via hoses.

[0034] Each bus module of the digital valve reversing linkage contains a main valve core position closed-loop control system consisting of a proportional pressure reducing valve, a position sensor, and a controller. This system enables precise flow control, has a smaller dead zone and hysteresis, facilitates high-precision control of the movement speed of hydraulic actuators, and has a fast response speed, providing technical support for the precise control of intelligent drilling rigs.

[0035] The remote control port of digital valve group 13 is connected to the oil inlet of electro-hydraulic switching valve 14 by a rubber hose, and the oil outlet of electro-hydraulic switching valve 14 is connected to the remote control port of switching valve group 15 by a rubber hose; when switching valve group 15 is in the left position, it can control the operation of unlatch cylinder 16, body tilt motor 18 and clamp cylinder 20; when electro-hydraulic switching valve 14 switches switching valve group 15 to the right position, it can control the operation of lower stabilizing cylinder I 17, lower stabilizing cylinder II 19 and translation cylinder 21.

[0036] The drain ports of digital valve group 13, electro-hydraulic switching valve 14, switching valve group 15 and digital main valve group 5 return directly to the oil tank through rubber hoses.

[0037] The return ports of digital valve group 13 and switching valve group 15 are connected to the inlet port of cooler 2 via rubber hoses, and the outlet port of cooler 2 is connected to the oil tank via rubber hoses.

[0038] One end of the motor displacement regulating valve 7 is connected to the remote control oil port of the hydraulic rotary motor 8 via a rubber hose, and the other end is connected to the remote control port of the digital main valve group 5. The oil drain port of the motor displacement regulating valve 7 is directly connected to the oil tank via a rubber hose. The motor displacement regulating valve 7 can electrically regulate the displacement of the hydraulic rotary motor 8 to meet the rotation speed requirements of the intelligent drilling rig for automatic drilling construction.

[0039] The return oil pressure gauge 4 (pressure sensor) is installed on the return oil line of the digital main valve group 5.

[0040] The auxiliary action LS relief valve 12 is located at the LS feedback port of the digital main valve group 5 and the digital valve group 13. The function of the digital valve feedback port LS is to provide feedback signals for the regulation and protection of the control system.

[0041] A rope displacement sensor is installed on the feed cylinder 9 to feed the speed and displacement of the feed cylinder 9 back to the intelligent drilling rig controller, forming a speed closed loop and a position closed loop for automatic adjustment of the drilling rig.

[0042] The intelligent drilling rig includes a main unit and an explosion-proof motor, oil tank, and control panel frame mounted on the tracked vehicle body. The explosion-proof motor and cooler 2 are screwed onto the tracked vehicle body. The main pump 1 is connected to the explosion-proof motor via a coupling and bolts. A rope displacement sensor is hinged to the side of the feed cylinder 9 to measure and provide feedback on the stroke of the feed cylinder 9. A high-pressure filter 3 is screwed onto the side of the oil tank. The return oil pressure gauge 4 (pressure sensor), digital main valve group 5, system pressure gauge 6 (pressure sensor), motor displacement regulating valve 7, and electro-hydraulic switching valve 14 are screwed onto the control panel frame. The digital valve group 13, switching valve group 15, and control panel frame are screwed onto the tracked vehicle body. The left track motor 10, right track motor 11, lower stabilizing cylinder I 17, and lower stabilizing cylinder II 19 are screwed onto the side of the tracked vehicle body. The hydraulic rotary motor 8, feed cylinder 9, unhooking cylinder 16, body tilt motor 18, clamping cylinder 20, and translation cylinder 21 are screwed onto the main unit.

[0043] When the intelligent drilling rig is working normally:

[0044] The main control board of the drilling rig controller directly sends bus signals to the digital main valve group 5 to control the displacement of the valve core of the digital main valve group 5, that is, to control the flow rate of the A / B oil ports, thereby controlling the movement speed of the feed cylinder 9. At the same time, the speed and displacement of the feed cylinder 9 are fed back to the intelligent drilling rig controller through the pull rope displacement sensor installed on the feed cylinder 9, forming a speed closed loop and position closed loop for automatic adjustment of the drilling rig. This ensures that the speed and displacement of the cylinder are precisely matched with the feed speed and feed displacement of the intelligent drilling rig, forming an automatic adjustment system for closed-loop control of drilling construction feed.

[0045] The other end of the high-pressure filter 3's three-way outlet is connected to the inlet of the digital valve group 13 via a hose. The first connection is connected to the first inlet P1 / P2 port of the switching valve group 15. The remote control port of the digital valve group 13 is connected to the inlet of the electro-hydraulic switching valve 14, and the outlet of the electro-hydraulic switching valve 14 is connected to the remote control port of the switching valve group 15. By default, the switching valve group 15 is in the left position, controlling the operation of the unhooking cylinder 16, the machine body tilt motor 18, and the clamping cylinder 20. The first connection A1 / A2 of the switching valve group 15 controls the extension / retraction of the unhooking cylinder 16 to achieve the clamping / releasing of the unhooking device; the second connection A1 / A2 of the switching valve group 15 controls the forward and reverse rotation of the main machine tilt motor 18 to achieve the adjustment of the main machine tilt angle to meet the drilling construction requirements of the intelligent drilling rig; the third connection A1 / A2 of the switching valve group 15 controls the extension / retraction of the clamping cylinder 20 to achieve the clamping / releasing of the unhooking device. If the electro-hydraulic switching valve 14 is operated manually or electrically, the switching valve group 15 will be switched to the right position, activating the lower stabilizing cylinder I 17, the lower stabilizing cylinder II 19, and the translation cylinder 21. The first B1 / B2 control of the switching valve group 15 extends / retracts the stabilizing cylinder I 17, achieving lower stabilizing support for the intelligent drilling rig; the second B1 / B2 control of the lower stabilizing cylinder II 19 extends / retracts, achieving lower stabilizing support for the intelligent drilling rig. The third B1 / B2 control of the translation cylinder 21 extends / retracts, adjusting the distance between the intelligent drilling rig main unit and the coal face at the borehole opening. (The operation functions of the lower stabilizing cylinder I 17, lower stabilizing cylinder II 19, and translation cylinder 21 are used during drilling preparation for rig fixation and attitude adjustment, ensuring reliable operation and meeting drilling angle requirements). Using a single digital valve achieves control of the actions of two actuators, saving cost and space while ensuring normal drilling operation.

[0046] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the specific details of the above embodiments. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, and these simple modifications all fall within the protection scope of the present invention.

[0047] It should also be noted that the various specific technical features described in the above embodiments can be combined in any suitable manner without contradiction. To avoid unnecessary repetition, this utility model will not describe the various possible combinations separately.

[0048] Furthermore, various different embodiments of this utility model can be combined in any way, as long as they do not violate the spirit of this utility model, they should also be regarded as the content disclosed by this utility model.

Claims

1. A switching valve, digital valve group, and intelligent drilling rig multi-mechanism control hydraulic system, characterized in that, Includes main pump (1), cooler (2), high pressure filter (3), return oil pressure gauge (4), digital main valve group (5), system pressure gauge (6), motor displacement regulating valve (7), hydraulic rotary motor (8), feed cylinder (9), left track motor (10), right track motor (11), auxiliary action LS overflow valve (12), digital valve group (13), electro-hydraulic switching valve (14), switching valve group (15), unlatch cylinder (16), lower stabilizing I cylinder (17), body tilt motor (18), lower stabilizing II cylinder (19), clamp cylinder (20), translation cylinder (21); The main pump (1) outlet is connected to the high pressure filter (3) inlet, and one end of the high pressure filter (3) three-way outlet is connected to the digital main valve group (5) inlet. The system pressure gauge (6) is connected to the digital main valve group (5) pressure test port with a pressure test line. The high pressure oil discharged by the main pump (1) enters the digital main valve group (5) through the high pressure filter (3), and the system pressure gauge (6) displays the real-time working pressure of the digital main valve group (5). The digital main valve group (5) controls the hydraulic rotary motor (8) to rotate forward and backward in the first link, controls the feed cylinder (9) to feed / pull out quickly in the second link, controls the feed cylinder (9) to feed / pull out slowly in the third link, controls the left track motor (10) in the fourth link, and controls the right track motor (11) in the fifth link. The other end of the three-way oil outlet of the high pressure filter (3) is connected to the oil inlet of the digital valve group (13). The working oil port of each valve of the digital valve group (13) is connected to the oil inlet of each valve of the switching valve group (15). Each valve of the switching valve group (15) can be connected to the unscrew cylinder (16), the lower stabilizing I cylinder (17), the body tilt motor (18), the lower stabilizing II cylinder (19), the clamp cylinder (20), and the translation cylinder (21) respectively. The remote control port of the digital valve group (13) is connected to the oil inlet of the electro-hydraulic switching valve (14), and the oil outlet of the electro-hydraulic switching valve (14) is connected to the remote control port of the switching valve group (15). When the switching valve group (15) is in the left position, it can control the operation of the unscrew cylinder (16), the body tilt motor (18), and the clamp cylinder (20). When the electro-hydraulic switching valve (14) switches the switching valve group (15) to the right position, it can control the operation of the lower stabilizing cylinder I (17), the lower stabilizing cylinder II (19), and the translation cylinder (21).

2. The switching valve, digital valve group, and intelligent drilling rig multi-mechanism control hydraulic system as described in claim 1, characterized in that, The drain ports of the digital valve group (13), electro-hydraulic switching valve (14), switching valve group (15) and digital main valve group (5) return directly to the oil tank through rubber hoses.

3. The switching valve, digital valve group, and intelligent drilling rig multi-mechanism control hydraulic system as described in claim 1, characterized in that, The return ports of the digital valve group (13) and the switching valve group (15) are connected to the inlet of the cooler (2) via rubber hoses, and the outlet of the cooler (2) is connected to the oil tank via rubber hoses.

4. The switching valve, digital valve group, and intelligent drilling rig multi-mechanism control hydraulic system as described in claim 1, characterized in that, One end of the motor displacement regulating valve (7) is connected to the remote control port of the hydraulic rotary motor (8), and the other end is connected to the remote control port of the digital main valve group (5). The drain port of the motor displacement regulating valve (7) is connected to the oil tank. The motor displacement regulating valve (7) can electrically regulate the displacement of the hydraulic rotary motor (8) to meet the rotation speed requirements of the intelligent drilling rig for automatic drilling construction.

5. The switching valve, digital valve group, and intelligent drilling rig multi-mechanism control hydraulic system as described in claim 1, characterized in that, The return oil pressure gauge (4) is installed on the return oil line of the digital main valve group (5).

6. The switching valve, digital valve group, and intelligent drilling rig multi-mechanism control hydraulic system as described in claim 1, characterized in that, The auxiliary action LS relief valve (12) is located at the LS feedback port of the digital main valve group (5) and the digital valve group (13).

7. The switching valve, digital valve group, and intelligent drilling rig multi-mechanism control hydraulic system as described in claim 1, characterized in that, A rope displacement sensor is installed on the feed cylinder (9) to feed back the speed and displacement of the feed cylinder (9) to the intelligent drilling rig.

8. The switching valve, digital valve group, and intelligent drilling rig multi-mechanism control hydraulic system as described in claim 1, characterized in that, The intelligent drilling rig includes a main unit, an explosion-proof electric motor, an oil tank, and a control panel frame mounted on a tracked vehicle body; The main pump (1) is connected to the explosion-proof motor via a coupling and bolts; the hydraulic rotary motor (8), feed cylinder (9), unscrew cylinder (16), body tilt motor (18), clamp cylinder (20) and translation cylinder (21) are screwed onto the main unit.

9. The switching valve, digital valve group, and intelligent drilling rig multi-mechanism control hydraulic system as described in claim 8, characterized in that, The high-pressure filter (3) is screwed to the side of the oil tank; the return oil pressure gauge (4), the digital main valve group (5), the system pressure gauge (6), the motor displacement regulating valve (7) and the electro-hydraulic switching valve (14) are screwed to the control panel frame.

10. The switching valve, digital valve group, and intelligent drilling rig multi-mechanism control hydraulic system as described in claim 9, characterized in that, The explosion-proof motor and cooler (2) are screwed onto the tracked vehicle body; the digital valve group (13), the switching valve group (15) and the control panel frame are screwed onto the tracked vehicle body; the left track motor (10), the right track motor (11), the lower stabilizing cylinder I (17) and the lower stabilizing cylinder II (19) are screwed onto the side of the tracked vehicle body.

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