Hydraulic control system and drill jumbo

Abstract

The utility model discloses a hydraulic control system and a drill jumbo, and relates to the technical field of hydraulic control, and the hydraulic control system comprises a pilot oil source valve, a pilot handle, a hydraulic control pilot valve group, a hydraulic control multi-way valve and an oil cylinder system. An oil inlet of the pilot oil source valve is connected with an oil outlet of the hydraulic pump, a first oil outlet of the pilot oil source valve is connected with an oil inlet of the pilot handle, an oil outlet of the pilot handle is connected with an oil inlet of the hydraulic control pilot valve set, and an oil outlet of the hydraulic control pilot valve set is connected with a pilot oil port of the hydraulic control multi-way valve. The hydraulic control multi-way valve is controlled to generate reversing action; an oil outlet of the hydraulic control multi-way valve is connected to the oil cylinder system so as to control the oil cylinder system to work. The hydraulic control system solves the problems that a traditional hydraulic control system is complex in structure, high in cost and very inconvenient to install and maintain.

Description

Technical Field

[0001] The present application relates to the field of hydraulic control technology, and in particular to a hydraulic control system and a drilling rig. Background Art

[0002] Currently, mining drilling rigs require the stability and angle of the propulsion system, and two pairs of hydraulic cylinders (four large and small triangular cylinders) are commonly used on the boom. These two pairs of cylinders require strong linkage when operating, and since they are located on the same boom, they require high levels of integrated motion. Currently, these two pairs of cylinders are controlled by multi-way valves, and a hydraulically controlled pilot valve block is used to control the multi-way valve's direction to achieve motion control for both pairs of cylinders. However, this hydraulically controlled pilot valve block is a five-way hydraulically controlled pilot valve block, which has many sections, is bulky, and is costly. This also complicates the piping structure of the entire hydraulic control system, making installation and maintenance very inconvenient.

[0003] Therefore, those skilled in the art are in urgent need of developing a hydraulic control system with a simple structure, low cost, and easy installation and maintenance. Utility Model Content

[0004] The purpose of this application is to provide a hydraulic control system and a rock drilling rig with a simple structure, low cost, and easy installation and maintenance, which solves the problems of traditional hydraulic control systems with complex structure, high cost, and very inconvenient installation and maintenance.

[0005] To achieve the above-mentioned purpose, the present application provides a hydraulic control system, including a pilot oil source valve, a pilot handle, a hydraulically controlled pilot valve group, a hydraulically controlled multi-way valve, and an oil cylinder system;

[0006] The oil inlet of the pilot oil source valve is used to be connected to the oil outlet of the hydraulic pump. The first oil outlet of the pilot oil source valve is connected to the oil inlet of the pilot handle. The oil outlet of the pilot handle is connected to the oil inlet of the hydraulic pilot valve group. The oil outlet of the hydraulic pilot valve group is connected to the pilot oil port of the hydraulic multi-way valve to control the reversing action of the hydraulic multi-way valve.

[0007] The oil outlet of the hydraulically controlled multi-way valve is connected to the cylinder system to control the operation of the cylinder system.

[0008] In some embodiments, the cylinder system includes two boom cylinders and two drill arm cylinders;

[0009] The hydraulically controlled multi-way valve is a two-way structure, which includes two parallel reversing valves. The two oil ports of one reversing valve are respectively connected to the support arm cylinder on the first side and the drill arm cylinder on the second side, and the two oil ports of the other reversing valve are respectively connected to the support arm cylinder on the second side and the drill arm cylinder on the first side.

[0010] In some embodiments, the hydraulic control system further comprises two hydraulic locks;

[0011] The two oil ports of one reversing valve are respectively connected to the two oil inlets of the corresponding hydraulic lock, and the two oil outlets of the corresponding hydraulic lock are respectively connected to the rodless chamber of the arm cylinder on the first side and the rod chamber of the drill arm cylinder on the second side, and the rod chamber of the arm cylinder on the first side is connected to the rodless chamber of the drill arm cylinder on the second side;

[0012] The two oil ports of another reversing valve are respectively connected to the two oil inlets of the corresponding hydraulic lock, and the two oil outlets of the corresponding hydraulic lock are respectively connected to the rodless chamber of the support arm cylinder on the second side and the rod chamber of the drill arm cylinder on the first side, and the rod chamber of the support arm cylinder on the second side is connected to the rodless chamber of the drill arm cylinder on the first side.

[0013] In some embodiments, the hydraulic control system further includes a hydraulic control one-way valve group, which includes a one-way valve group body and a first two-position three-way solenoid valve;

[0014] The oil inlet of the first two-position three-way solenoid valve is connected to the second oil outlet of the pilot oil source valve, and the oil outlet of the first two-position three-way solenoid valve is connected to the one-way valve group body;

[0015] The rodless chamber of the drill arm oil cylinder on the first side and the rodless chamber of the drill arm oil cylinder on the second side are both connected to the one-way valve group body, and one of the oil ports of the two reversing valves is connected to the one-way valve group body.

[0016] In some embodiments, the hydraulically controlled pilot valve group includes two parallel-connected two-position six-way solenoid valves;

[0017] The two oil outlets of the two-position six-way solenoid valve are respectively connected to the two pilot oil ports of the corresponding reversing valve, and the four oil outlets of the pilot handle are respectively connected to the oil inlets of the two two-position six-way solenoid valves.

[0018] In some embodiments, the pilot handle is a hydraulic pilot handle, and two electric switches are provided on the pilot handle, one of which is used to control the power supply to two two-position six-way solenoid valves, and the other electric switch is used to control the power supply to the first two-position three-way solenoid valve.

[0019] In some embodiments, any support arm cylinder and any drill arm cylinder are connected to a cylinder balancing valve group.

[0020] In some embodiments, the reversing valve is a three-position six-way hydraulically controlled reversing valve.

[0021] In some embodiments, the pilot oil source valve is internally provided with a second two-position three-way solenoid valve, and the second two-position three-way solenoid valve is used to control the on-off of the first oil outlet of the pilot oil source valve.

[0022] The present application also provides a drilling rig comprising any of the above-mentioned hydraulic control systems.

[0023] Compared to the above background technology, the hydraulic control system provided in the embodiment of the present application includes a pilot oil source valve, a pilot handle, a hydraulically controlled pilot valve group, a hydraulically controlled multi-way valve, and a cylinder system. The oil inlet of the pilot oil source valve is connected to the oil outlet of the hydraulic pump, the first oil outlet of the pilot oil source valve is connected to the oil inlet of the pilot handle, the oil outlet of the pilot handle is connected to the oil inlet of the hydraulically controlled pilot valve group, and the oil outlet of the hydraulically controlled pilot valve group is connected to the pilot oil outlet of the hydraulically controlled multi-way valve to control the switching action of the hydraulically controlled multi-way valve; the oil outlet of the hydraulically controlled multi-way valve is connected to the cylinder system to control the operation of the cylinder system.

[0024] Compared with the traditional hydraulic control system, the hydraulic control system provided in the embodiment of the present application controls the pilot oil entering the hydraulic pilot valve group through the pilot handle, and controls the pilot oil entering the pilot oil port of the hydraulic multi-way valve through the hydraulic pilot valve group to control the switching action of the hydraulic multi-way valve, so that multiple working cylinders in the cylinder system can cooperate to perform different working actions. That is to say, a pilot handle can control the switching of the hydraulic multi-way valve, thereby simultaneously controlling the operation of multiple working cylinders in the cylinder system. At the same time, compared with the traditional five-unit hydraulic pilot valve block, the hydraulic pilot valve group has high controllability, small size, easy installation and maintenance, and lower cost. The pilot control oil circuit set up in this way not only has a simple structure and low cost, but also is easy to install and maintain, which solves the problems of complex structure, high cost and inconvenient installation and maintenance of the traditional hydraulic control system. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application or related technologies, the following briefly introduces the drawings required for use in the embodiments or related technical descriptions. Obviously, the drawings described below are merely embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without any creative work.

[0026] Figure 1 This is a schematic diagram of the hydraulic control system in the embodiment of the present application;

[0027] Figure 2 for Figure 1 The schematic diagram of the hydraulic control system in the first working condition is shown;

[0028] Figure 3 for Figure 1 The schematic diagram of the hydraulic control system in the second working condition is shown;

[0029] Figure 4 for Figure 1 The schematic diagram of the hydraulic control system in the third working condition is shown;

[0030] Figure 5 for Figure 1The schematic diagram of the hydraulic control system in the fourth working condition is shown;

[0031] Figure 6 for Figure 1 The schematic diagram of the hydraulic control system in the fifth working condition is shown.

[0032] in:

[0033] 10-pilot oil source valve, 11-second two-position three-way solenoid valve;

[0034] 20-pilot handle;

[0035] 30- hydraulically controlled pilot valve group, 31- two-position six-way solenoid valve;

[0036] 40-hydraulic controlled multi-way valve, 41-direction valve, 411-pilot oil port;

[0037] 50-Cylinder system, 51-Boom cylinder, 52-Drill arm cylinder, 53-Cylinder balancing valve group;

[0038] 60-Hydraulic lock;

[0039] 70- hydraulically controlled one-way valve group, 71- one-way valve group body, 72- first two-position three-way solenoid valve. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0041] In order to enable those skilled in the art to better understand the present application, the present application is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0042] like Figure 1 As shown, the hydraulic control system provided in the embodiment of the present application includes a pilot oil source valve 10, a pilot handle 20, a hydraulic pilot valve group 30, a hydraulic multi-way valve 40, and an oil cylinder system 50. Among them:

[0043] The oil inlet of the pilot oil source valve 10 is connected to the oil outlet of the hydraulic pump. The hydraulic pump is used to provide power to achieve the purpose of transporting the pilot oil in the hydraulic oil source. The first oil outlet A of the pilot oil source valve 10 is connected to the oil inlet P of the pilot handle 20. The pilot oil in the pilot oil source is pressure-regulated by the pilot oil source valve 10 and flows out from the first oil outlet A of the pilot oil source valve 10 and enters the pilot handle 20 through the oil inlet P of the pilot handle 20.

[0044] The oil outlet of the pilot handle 20 is connected to the oil inlet of the hydraulic pilot valve group 30 , and the oil outlet of the hydraulic pilot valve group 30 is connected to the pilot oil port 411 of the hydraulic multi-way valve 40 to control the hydraulic multi-way valve 40 to produce a switching action.

[0045] The multiple oil outlets of the hydraulically controlled multi-way valve 40 are respectively connected to the multiple working cylinders of the cylinder system 50 to control the multiple working cylinders of the cylinder system 50 to work.

[0046] Compared with the traditional hydraulic control system, the hydraulic control system provided in the embodiment of the present application controls the pilot oil entering the hydraulic pilot valve group 30 through the pilot handle 20, and controls the pilot oil entering the pilot oil port 411 of the hydraulic multi-way valve 40 through the hydraulic pilot valve group 30 to control the switching action of the hydraulic multi-way valve 40, so that the multiple working cylinders of the cylinder system 50 cooperate to perform different working actions. That is to say, a pilot handle 20 can control the switching of the hydraulic multi-way valve 40, thereby simultaneously controlling the operation of multiple working cylinders of the cylinder system 50. At the same time, compared with the traditional five-unit hydraulic pilot valve block, the hydraulic pilot valve group 30 has high controllability, small size, easy installation and maintenance, and lower cost. The pilot control oil circuit set in this way not only has a simple structure and low cost, but also is easy to install and maintain, solving the problems of complex structure, high cost and inconvenient installation and maintenance of the traditional hydraulic control system.

[0047] In some embodiments, the cylinder system 50 includes two arm cylinders 51 and two drill arm cylinders 52. The arm cylinders 51 are also called large triangular cylinders, and the drill arm cylinders 52 are also called small triangular cylinders. Together, these four cylinders form a working system on the boom of the drilling rig to perform tasks such as drilling.

[0048] In some embodiments, any arm cylinder 51 and any drill arm cylinder 52 of the cylinder system 50 are connected to a cylinder balancing valve group 53. The cylinder balancing valve group 53 includes a one-way valve and a balancing valve. The cylinder balancing valve group 53 is used to maintain the pressure of the corresponding working cylinder to ensure the stability of the corresponding working cylinder during operation.

[0049] In order to facilitate the control of the operation of the two pairs of cylinders, the hydraulically controlled multi-way valve 40 is a two-link structure. The two pairs of cylinders are controlled by the two-link structure in the hydraulically controlled multi-way valve 40. The two-link structure is respectively connected to the rodless cavity of the arm cylinder 51 on one side and the rod cavity of the drill arm cylinder 52 on the other side. For example: when the rodless cavity of the left arm cylinder 51 is filled with oil, the rodless cavity of the right drill arm cylinder 52 is also filled with oil to perform the lifting of the trolley arm (or boom). At the same time, the volume ratio of the rodless cavities of the two cylinders is fixed, so the trolley propulsion system can remain perpendicular to the rock surface.

[0050] Specifically, the hydraulically controlled multi-way valve 40 includes two parallel reversing valves 41, wherein the two oil ports of one reversing valve 41 are respectively connected to the rodless chamber of the first side arm cylinder 51 and the rod chamber of the second side drilling arm cylinder 52, and the two oil ports of the other reversing valve 41 are respectively connected to the rodless chamber of the second side arm cylinder 51 and the rod chamber of the first side drilling arm cylinder 52.

[0051] It should be noted that the so-called first side refers to Figure 1 The left side shown, the second side refers to Figure 1 Right side shown.

[0052] In some embodiments, the reversing valve 41 is a three-position six-way hydraulically controlled reversing valve. The two three-position six-way hydraulically controlled reversing valves are provided with a pilot oil port 411 at both ends.

[0053] Furthermore, the hydraulic control system further includes two hydraulic locks 60 , which are respectively provided on the oil circuit between the two reversing valves 41 and the oil cylinder system 50 , and each hydraulic lock 60 includes two parallel one-way valves.

[0054] Specifically, the two oil ports of one reversing valve 41 are respectively connected to the two oil inlets of the corresponding hydraulic lock 60 (the left hydraulic lock 60), and the two oil outlets of the corresponding hydraulic lock 60 are respectively connected to the rodless chamber of the arm cylinder 51 on the first side and the rod chamber of the drill arm cylinder 52 on the second side, and the rod chamber of the arm cylinder 51 on the first side is connected to the rodless chamber of the drill arm cylinder 52 on the second side; the two oil ports of the other reversing valve 41 are respectively connected to the two oil inlets of the corresponding hydraulic lock 60 (the right hydraulic lock 60), and the two oil outlets of the corresponding hydraulic lock 60 are respectively connected to the rodless chamber of the arm cylinder 51 on the second side and the rod chamber of the drill arm cylinder 52 on the first side, and the rod chamber of the arm cylinder 51 on the second side is connected to the rodless chamber of the drill arm cylinder 52 on the first side.

[0055] The above-mentioned arrangement can realize the working interconnection of the four working cylinders, and the corresponding working cylinder actions can be controlled by controlling the reversing of the corresponding reversing valve 41.

[0056] Furthermore, the hydraulic control system further includes a hydraulically controlled one-way valve group 70 , which includes a one-way valve group body 71 and a first two-position three-way solenoid valve 72 .

[0057] The oil inlet of the first two-position three-way solenoid valve 72 is connected to the second oil outlet B of the pilot oil source valve 10, and the oil outlet of the first two-position three-way solenoid valve 72 is connected to the one-way valve group body 71. In this way, the oil circuit switching is controlled by the gain and loss of electricity of the first two-position three-way solenoid valve 72, thereby realizing the conduction of the one-way valve group body 71, which facilitates the oil return of the cylinder system 50 through the one-way valve group body 71.

[0058] The one-way valve assembly body 71 has two parallel oil return paths. The rodless chamber of the first-side drill boom cylinder 52 and the rodless chamber of the second-side drill boom cylinder 52 are both connected to the one-way valve assembly body 71. One of the oil ports of the two reversing valves 41 is also connected to the one-way valve assembly body 71. In this way, the rodless chamber of the first-side drill boom cylinder 52 and the rodless chamber of the second-side drill boom cylinder 52 can return oil through the two parallel oil return paths of the one-way valve assembly body 71.

[0059] In some embodiments, the hydraulically controlled pilot valve group 30 includes two parallel two-position six-way solenoid valves 31 , and the two parallel two-position six-way solenoid valves 31 are respectively connected to two parallel reversing valves 41 .

[0060] Specifically, the pilot handle 20 has four oil outlets, C1, C2, C3 and C4, which are controlled on and off by the handle body of the pilot handle 20. The four oil outlets of the pilot handle 20 are respectively connected to the oil inlets of two two-position six-way solenoid valves 31, and the two oil outlets of the two-position six-way solenoid valves 31 are respectively connected to the two pilot oil ports 411 of the corresponding reversing valve 41.

[0061] In some embodiments, the pilot handle 20 is a hydraulic pilot handle, and two electric switches are provided on the pilot handle 20, one of which is used to control the power supply to the two two-position six-way solenoid valves 31, and the other electric switch is used to control the power supply to the first two-position three-way solenoid valve 72.

[0062] In some embodiments, the pilot oil source valve 10 is internally provided with a second two-position three-way solenoid valve 11 , which is used to control the on-off of the first oil outlet of the pilot oil source valve 10 .

[0063] It should be noted that when the pilot handle 20 is in operation, the second two-position three-way solenoid valve 11 is always in an energized state, so that the working position of the second two-position three-way solenoid valve 11 is always in the right position, that is, the first oil outlet A of the pilot oil source valve 10 is always in a conducting state.

[0064] The following describes in detail the working conditions of the hydraulic control system provided in the embodiment of the present application:

[0065] like Figure 2As shown, as the first working condition, the pilot handle 20 is pushed forward, and the valve cores corresponding to C2 and C3 act, causing the pilot oil to flow out from the oil outlet C2 and oil outlet C3 of the pilot handle 20. At this time, the two two-position six-way solenoid valves 31 are de-energized, and the two two-position six-way solenoid valves 31 are in the left position. The pilot oil at the oil outlet C2 of the pilot handle 20 flows through the left position of the two-position six-way solenoid valve 31 and the port b1 of the hydraulically controlled multi-way valve 40 to the upper pilot oil port 411 of the left reversing valve 41, causing the left reversing valve 41 to switch to the upper position. The pilot oil at the oil outlet C3 of the pilot handle 20 flows through the left position of the two-position six-way solenoid valve 31 and the port a2 of the hydraulically controlled multi-way valve 40 to the lower pilot oil port 411 of the right reversing valve 41, causing the right reversing valve 41 to switch to the lower position.

[0066] In this way, one line of working oil in the main oil circuit flows to the rodless chamber of the left arm cylinder 51 through the B1 port of the hydraulically controlled multi-way valve 40, and the other line of working oil flows to the rodless chamber of the right arm cylinder 51 through the A2 port of the hydraulically controlled multi-way valve 40. Since the rods of the arm cylinders 51 on both sides are fixed, the cylinder bodies of the arm cylinders 51 on both sides rise upward, realizing the arm lifting action of the trolley.

[0067] It should be noted that while oil is flowing into the rodless chambers of the arm cylinders 51 on both sides, the return oil paths of the rod chambers of the arm cylinders 51 on both sides are blocked by the corresponding hydraulic locks 60. Therefore, the oil in the rod chambers of the arm cylinders 51 on both sides respectively enters the rodless chambers of the opposite arm cylinders 52, causing the rods of the two arm cylinders 51 to extend at the same time.

[0068] like Figure 3 As shown, in the second working condition, the pilot handle 20 is pushed backward, and the corresponding valve cores C1 and C4 act, causing the pilot oil to flow out from the oil outlet C1 and oil outlet C4 of the pilot handle 20. At this time, the two two-position six-way solenoid valves 31 are de-energized, and the two two-position six-way solenoid valves 31 are in the left position. The pilot oil at the oil outlet C1 of the pilot handle 20 flows through the left position of the two-position six-way solenoid valve 31 on the right side, from the port b2 of the hydraulically controlled multi-way valve 40 to the upper pilot oil port 411 of the right reversing valve 41, causing the right reversing valve 41 to switch to the upper position. The pilot oil at the oil outlet C4 of the pilot handle 20 flows through the left position of the two-position six-way solenoid valve 31 on the left side, from the port a1 of the hydraulically controlled multi-way valve 40 to the lower pilot oil port 411 of the left reversing valve 41, causing the left reversing valve 41 to switch to the lower position.

[0069] In this way, one line of working oil in the main oil circuit flows to the rod chamber of the left drill arm cylinder 52 through the B2 port of the hydraulically controlled multi-way valve 40, and the other line of working oil flows to the rod chamber of the right drill arm cylinder 52 through the A1 port of the hydraulically controlled multi-way valve 40, so that the rods of the drill arm cylinders 52 on both sides are retracted. At the same time, the return oil path of the rodless chamber of the drill arm cylinders 52 on both sides is blocked by the one-way valve group body 71 (at this time, the first two-position three-way solenoid valve 72 is not energized, and the one-way valve group body 71 is closed). Therefore, the oil in the rodless chamber of the drill arm cylinders 52 on both sides respectively enters the rod chamber of the opposite support arm cylinder 51, so that the cylinder bodies of the two support arm cylinders 51 are retracted, realizing the support arm retraction action of the trolley.

[0070] like Figure 4 As shown, as the third working condition, the pilot handle 20 is pushed to the left, and the corresponding valve cores of C1 and C2 act, causing the pilot oil to flow out from the oil outlet C1 and oil outlet C2 of the pilot handle 20. At this time, the two two-position six-way solenoid valves 31 are de-energized, and the two two-position six-way solenoid valves 31 are in the left position. The pilot oil at the oil outlet C1 of the pilot handle 20 flows through the left position of the two-position six-way solenoid valve 31 on the right side, from the port b2 of the hydraulically controlled multi-way valve 40 to the upper pilot oil port 411 of the right reversing valve 41, causing the right reversing valve 41 to switch to the upper position. The pilot oil at the oil outlet C2 of the pilot handle 20 flows through the left position of the two-position six-way solenoid valve 31 on the left side, from the port b1 of the hydraulically controlled multi-way valve 40 to the upper pilot oil port 411 of the left reversing valve 41, causing the left reversing valve 41 to switch to the upper position.

[0071] In this way, one line of working oil in the main oil circuit flows to the rod chamber of the left drill arm cylinder 52 through the B2 port of the hydraulically controlled multi-way valve 40, and the other line of working oil flows to the rodless chamber of the left support arm cylinder 51 through the B1 port of the hydraulically controlled multi-way valve 40. At the same time, the return oil path of the rodless chamber of the left drill arm cylinder 52 is blocked by the one-way valve group body 71 (at this time, the first two-position three-way solenoid valve 72 is not energized, and the one-way valve group body 71 is closed), and then the oil returns to the rod chamber of the right support arm cylinder 51. The return oil path of the rod chamber of the left support arm cylinder 51 is blocked by the corresponding hydraulic lock 60. Therefore, the oil in the rod chamber of the left support arm cylinder 51 enters the rodless chamber of the opposite drill arm cylinder 52, causing the rod of the left drill arm cylinder 52 to be retracted, the rod of the right drill arm cylinder 52 to be extended, the cylinder body of the left support arm cylinder 51 to be extended, and the cylinder body of the right support arm cylinder 51 to be retracted, thereby realizing the left deviation of the trolley's support arm.

[0072] like Figure 5As shown, as the fourth working condition, the pilot handle 20 is pushed forward, and the valve cores corresponding to C2 and C3 act, so that the pilot oil flows out from the oil outlet C2 and the oil outlet C3 of the pilot handle 20. At this time, the two two-position six-way solenoid valves 31 and the first two-position three-way solenoid valve 72 are both energized, the two two-position six-way solenoid valves 31 work in the right position, and the first two-position three-way solenoid valve 72 works in the right position. The pilot oil of the second oil outlet B of the pilot oil source valve 10 enters the one-way valve group body 71 through the right position of the first two-position three-way solenoid valve 72, thereby conducting the one-way valve group body 71. The pilot oil from the oil outlet C2 of the pilot handle 20 flows through the right position of the two-position six-way solenoid valve 31 on the left and the a1 port of the hydraulically controlled multi-way valve 40 to the lower pilot oil port 411 of the left reversing valve 41, so that the left reversing valve 41 is switched to the lower position. The pilot oil from the oil outlet C3 of the pilot handle 20 flows through the right position of the two-position six-way solenoid valve 31 on the right and the b2 port of the hydraulically controlled multi-way valve 40 to the upper pilot oil port 411 of the right reversing valve 41, so that the right reversing valve 41 is switched to the upper position.

[0073] In this way, one line of working oil in the main oil circuit flows to the rod chamber of the right drill boom cylinder 52 through the A1 port of the hydraulically controlled multi-way valve 40, and the other line of working oil flows to the rod chamber of the left drill boom cylinder 52 through the B2 port of the hydraulically controlled multi-way valve 40. At this time, the rods of the drill boom cylinders 52 on both sides are retracted to achieve the lifting of the drill boom (due to structural reasons, the drill boom is lifted when the rods of the drill boom cylinders 52 are retracted).

[0074] At the same time, the oil in the rodless chambers of the drill arm cylinders 52 on both sides returns to the oil tank through the one-way valve group body 71.

[0075] like Figure 6 As shown, as the fifth working condition, the pilot handle 20 is pushed to the left, and the valve cores corresponding to C1 and C2 act, so that the pilot oil flows out from the oil outlet C1 and the oil outlet C2 of the pilot handle 20. At this time, the two two-position six-way solenoid valves 31 and the first two-position three-way solenoid valve 72 are both energized, the two two-position six-way solenoid valves 31 work in the right position, and the first two-position three-way solenoid valve 72 works in the right position. The pilot oil of the second oil outlet B of the pilot oil source valve 10 enters the one-way valve group body 71 through the right position of the first two-position three-way solenoid valve 72, thereby conducting the one-way valve group body 71. The pilot oil from the oil outlet C1 of the pilot handle 20 flows through the right position of the two-position six-way solenoid valve 31 on the right side from the a2 port of the hydraulically controlled multi-way valve 40 to the lower pilot oil port 411 of the right reversing valve 41, so that the right reversing valve 41 is switched to the lower position; the pilot oil from the oil outlet C2 of the pilot handle 20 flows through the right position of the two-position six-way solenoid valve 31 on the left side from the a1 port of the hydraulically controlled multi-way valve 40 to the lower pilot oil port 411 of the left reversing valve 41, so that the left reversing valve 41 is switched to the lower position.

[0076] In this way, one line of working oil in the main oil circuit flows to the rodless chamber of the right support arm cylinder 51 and the rodless chamber of the left drill arm cylinder 52 through the A2 port of the hydraulically controlled multi-way valve 40. Since the right support arm cylinder 51 is located at the rear end of the boom and has a greater load (pressure), the hydraulic oil always flows to the low-pressure area. Therefore, all the hydraulic oil flows to the rodless chamber of the left drill arm cylinder 52, and the other line of working oil flows to the rod chamber of the right drill arm cylinder 52 through the A1 port of the hydraulically controlled multi-way valve 40, causing the rod of the left drill arm cylinder 52 to extend and the rod of the right drill arm cylinder 52 to retract, thereby realizing the left deviation of the drill arm.

[0077] At the same time, the rod chamber of the left drill arm oil cylinder 52 returns oil through the corresponding hydraulic lock 60, and the rodless chamber of the right drill arm oil cylinder 52 flows back to the oil tank through the one-way valve group body 71.

[0078] To sum up, the hydraulic control system provided in the embodiment of the present application controls the pilot oil entering two parallel two-position six-way solenoid valves 31 through a pilot handle 20, and controls the pilot oil entering the pilot oil ports 411 of the two parallel reversing valves 41 through the two parallel two-position six-way solenoid valves 31, respectively, to control the switching action of the two parallel reversing valves 41, so as to enable the four working cylinders in the cylinder system 50 to cooperate in performing different working actions. The oil circuit of the hydraulic control system is simplified, and the number of oil circuits passing through the boom is reduced, which greatly simplifies the design difficulty of the hydraulic oil delivery structure and ensures that the oil circuit in the boom is safe and reliable. At the same time, a pilot handle 20 with an electric control switch can be used to control the two parallel reversing valves 41 to perform the reversing action, and can simultaneously control the operation of the cylinder system 50, further simplifying the hydraulic pilot control circuit.

[0079] The present application provides a drilling rig, which includes the hydraulic control system described in the above specific embodiment; other parts of the drilling rig can refer to relevant technologies and will not be elaborated in this article.

[0080] It should be noted that, in this specification, relational terms such as first and second are merely used to distinguish one entity from other entities, but do not necessarily require or imply any actual relationship or order between these entities.

[0081] The above is a detailed introduction to the hydraulic control system and drilling rig provided by this application. Specific examples are used herein to illustrate the principles and implementation methods of this application. The description of the above embodiments is only intended to help understand the solution and core ideas of this application. It should be noted that for ordinary technicians in this technical field, without departing from the principles of this application, several improvements and modifications can be made to this application, and these improvements and modifications also fall within the scope of protection of this application.

Claims

1. A hydraulic control system, characterized in that: Including pilot oil source valve, pilot handle, hydraulic pilot valve group, hydraulic multi-way valve, and oil cylinder system; The oil inlet of the pilot oil source valve is used to be connected to the oil outlet of the hydraulic pump, the first oil outlet of the pilot oil source valve is connected to the oil inlet of the pilot handle, the oil outlet of the pilot handle is connected to the oil inlet of the hydraulically controlled pilot valve group, and the oil outlet of the hydraulically controlled pilot valve group is connected to the pilot oil port of the hydraulically controlled multi-way valve to control the hydraulically controlled multi-way valve to produce a switching action; The oil outlet of the hydraulically controlled multi-way valve is connected to the oil cylinder system to control the operation of the oil cylinder system.

2. The hydraulic control system according to claim 1, characterized in that: The cylinder system includes two support arm cylinders and two drill arm cylinders; The hydraulically controlled multi-way valve is a two-way structure, and the hydraulically controlled multi-way valve includes two parallel reversing valves, wherein the two oil ports of one of the reversing valves are respectively connected to the support arm cylinder on the first side and the drill arm cylinder on the second side, and the two oil ports of the other reversing valve are respectively connected to the support arm cylinder on the second side and the drill arm cylinder on the first side.

3. The hydraulic control system according to claim 2, characterized in that: The hydraulic control system also includes two hydraulic locks; The two oil ports of one of the reversing valves are respectively connected to the two oil inlets of the corresponding hydraulic lock, and the two oil outlets of the corresponding hydraulic lock are respectively connected to the rodless chamber of the arm cylinder on the first side and the rod chamber of the drill arm cylinder on the second side, and the rod chamber of the arm cylinder on the first side is connected to the rodless chamber of the drill arm cylinder on the second side; The two oil ports of the other reversing valve are respectively connected to the two oil inlets of the corresponding hydraulic lock, and the two oil outlets of the corresponding hydraulic lock are respectively connected to the rodless chamber of the support arm cylinder on the second side and the rod chamber of the drill arm cylinder on the first side, and the rod chamber of the support arm cylinder on the second side is connected to the rodless chamber of the drill arm cylinder on the first side.

4. The hydraulic control system according to claim 3, characterized in that: The hydraulic control system further includes a hydraulically controlled one-way valve group, which includes a one-way valve group body and a first two-position three-way solenoid valve; The oil inlet of the first two-position three-way solenoid valve is connected to the second oil outlet of the pilot oil source valve, and the oil outlet of the first two-position three-way solenoid valve is connected to the one-way valve group body; The rodless chamber of the drill arm oil cylinder on the first side and the rodless chamber of the drill arm oil cylinder on the second side are both connected to the one-way valve group body, and one of the oil ports of the two reversing valves is connected to the one-way valve group body.

5. The hydraulic control system according to claim 4, characterized in that: The hydraulically controlled pilot valve group includes two parallel-connected two-position six-way solenoid valves; The two oil outlets of the two-position six-way solenoid valve are respectively connected to the two pilot oil ports of the corresponding reversing valve, and the four oil outlets of the pilot handle are respectively connected to the oil inlets of the two two-position six-way solenoid valves.

6. The hydraulic control system according to claim 5, characterized in that: The pilot handle is a hydraulic pilot handle, and two electric control switches are provided on the pilot handle, one of which is used to control the power supply of the two two-position six-way solenoid valves, and the other electric control switch is used to control the power supply of the first two-position three-way solenoid valve.

7. The hydraulic control system according to claim 2, characterized in that: Any of the support arm oil cylinders and any of the drill arm oil cylinders are connected to an oil cylinder balancing valve group.

8. The hydraulic control system according to claim 2, characterized in that: The reversing valve is a three-position six-way hydraulically controlled reversing valve.

9. The hydraulic control system according to claim 1, characterized in that: The pilot oil source valve is internally provided with a second two-position three-way solenoid valve, and the second two-position three-way solenoid valve is used to control the on-off of the first oil outlet of the pilot oil source valve.

10. A rock drilling rig, characterized in that: Comprising the hydraulic control system according to any one of claims 1 to 9.

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