A hydraulic control system for a shaft tunneling machine and a shaft tunneling machine

Abstract

The present invention provides a hydraulic control system for a shaft boring machine and a shaft boring machine. The hydraulic control system includes: an oil pump, an oil tank, a three-position four-way electromagnetic directional control valve, a three-position four-way hydraulic control directional control valve, and a normally closed stop valve. The left and right paths of the three-position four-way hydraulic control directional control valve are switched by the three-position four-way electromagnetic directional control valve, so that the three-position four-way hydraulic control directional control valve controls the extension and retraction of the working cylinder of the shaft boring machine. In addition, an emergency control oil path for opening the right path of the three-position four-way hydraulic control directional control valve is additionally provided, and the normally closed stop valve is arranged on this emergency control oil path. Thus, when a fault occurs in the underground electrical system, opening this normally closed stop valve can control the opening of the right path of the three-position four-way hydraulic control directional control valve to control the retraction of the working cylinder of the shaft boring machine, that is, to reset each actuator of the shaft boring machine to the posture allowing hoisting and lifting, thereby facilitating the hoisting of the shaft boring machine to the ground for maintenance.

Description

Technical Field

[0001] The present invention relates to the technical field of construction machinery, and particularly relates to a hydraulic control system for a shaft tunneling machine and a shaft tunneling machine. Background Art

[0002] The shaft tunneling machine often works in a water well dozens of meters deep, and the main bin and the segment are fixed by pins. Once the electrical control circuit fails, each excavation working mechanism of the tunneling machine will not be able to operate, and it is very difficult for personnel to dive into the water for maintenance. Therefore, it is necessary to set up a remote emergency operation system on the ground to quickly and conveniently reset each mechanism of the shaft tunneling machine after the electrical failure, so as to facilitate hoisting to the ground for maintenance. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a hydraulic control system for a shaft tunneling machine, which can reset each actuator of the shaft tunneling machine to a posture allowing hoisting and lifting when the electrical system of the underground main machine fails while completing each excavation work under normal working conditions of the tunneling machine. The present invention also correspondingly provides a shaft tunneling machine with the hydraulic control system for the shaft tunneling machine.

[0004] The technical solution adopted to solve the technical problem of the present invention is as follows:

[0005] The present invention provides a hydraulic control system for a shaft tunneling machine, including:

[0006] An oil pump, an oil tank, a three-position four-way electromagnetic directional control valve, a three-position four-way hydraulic control directional control valve and a normally closed stop valve,

[0007] The oil inlet of the three-position four-way electromagnetic directional control valve is communicated with the oil pump, the oil return port of the three-position four-way electromagnetic directional control valve is communicated with the oil tank, the first working oil port of the three-position four-way electromagnetic directional control valve is communicated with the left-position reversing control oil port of the three-position four-way hydraulic control directional control valve, and the second working oil port of the three-position four-way electromagnetic directional control valve is communicated with the right-position reversing control oil port of the three-position four-way hydraulic control directional control valve.

[0008] The oil inlet of the three-position four-way hydraulic control directional control valve is communicated with the oil pump, the oil return port of the three-position four-way hydraulic control directional control valve is communicated with the oil tank, the first working oil port of the three-position four-way hydraulic control directional control valve is communicated with the rodless cavity of the working cylinder of the shaft tunneling machine, and the second working oil port of the three-position four-way hydraulic control directional control valve is communicated with the rod cavity of the working cylinder of the shaft tunneling machine.

[0009] The right-position control oil port of the three-position four-way hydraulic control directional control valve is also communicated with the oil pump, and the normally closed stop valve is arranged on the oil path where the right-position reversing control oil port of the three-position four-way hydraulic control directional control valve is communicated with the oil pump.

[0010] The oil pump is communicated with the oil tank.

[0011] When the left path of the three-position four-way electromagnetic directional valve is energized, the oil pump can pump the hydraulic oil in the system hydraulic oil circuit into the left-position commutation control oil port of the three-position four-way hydraulic control directional valve through the left path of the three-position four-way electromagnetic directional valve, so as to open the left path of the three-position four-way hydraulic control directional valve. At the same time, the oil pump pumps the hydraulic oil in the system hydraulic oil circuit into the rodless cavity of the working cylinder through the left path of the three-position four-way hydraulic control directional valve, so as to extend the working cylinder.

[0012] When the right path of the three-position four-way electromagnetic directional valve is energized, the oil pump can pump the hydraulic oil in the system hydraulic oil circuit into the right-position commutation control oil port of the three-position four-way hydraulic control directional valve through the right path of the three-position four-way electromagnetic directional valve, so as to open the right path of the three-position four-way hydraulic control directional valve. At the same time, the oil pump pumps the hydraulic oil in the system hydraulic oil circuit into the rod cavity on the right side of the working cylinder through the right path of the three-position four-way hydraulic control directional valve, so as to retract the working cylinder.

[0013] When the three-position four-way electromagnetic directional valve is de-energized and in the middle position, the normally closed stop valve can be manually or automatically opened. The oil pump can pump the hydraulic oil in the system hydraulic oil circuit into the right-position commutation control oil port of the three-position four-way hydraulic control directional valve, so as to open the right path of the three-position four-way hydraulic control directional valve. At the same time, the oil pump pumps the hydraulic oil in the system hydraulic oil circuit into the rod cavity on the right side of the working cylinder through the right path of the three-position four-way hydraulic control directional valve, so as to retract the working cylinder.

[0014] Optionally, it further includes a shuttle valve. The shuttle valve is simultaneously located on the oil path connecting the second working oil port of the three-position four-way electromagnetic directional valve and the right-position commutation control oil port of the three-position four-way hydraulic control directional valve, and on the oil path connecting the right-position commutation control oil port of the three-position four-way hydraulic control directional valve and the oil pump.

[0015] The left oil inlet of the shuttle valve is connected to the second working oil port of the three-position four-way electromagnetic directional valve, the right oil inlet of the shuttle valve is connected to the oil pump, and the oil outlet of the shuttle valve is connected to the right-position control oil port of the three-position four-way hydraulic control directional valve.

[0016] Optionally, it further includes a pressure reducing valve. The pressure reducing valve is located on the oil path connecting the right-position commutation control oil port of the three-position four-way hydraulic control directional valve and the oil pump.

[0017] Optionally, it further includes a normally open stop valve. A bypass oil path is connected to the oil path connecting the right-position commutation control oil port of the three-position four-way hydraulic control directional valve and the oil pump. The bypass oil path is connected to the fuel tank, and the normally open stop valve is arranged on the bypass oil path.

[0018] Optionally, there are multiple working cylinders. There are multiple three-position four-way electromagnetic directional valves, three-position four-way hydraulic control directional valves and shuttle valves respectively, and they correspond to the multiple working cylinders one by one.

[0019] Optionally, a plurality of normally-closed stop valves, pressure reducing valves and normally-open stop valves are also provided respectively, and are in one-to-one correspondence with a plurality of working cylinders.

[0020] Optionally, a pressure reducing valve and a normally-open stop valve are further included. The pressure reducing valve is located on the oil path connecting the right-position commutation control oil port of the three-position four-way hydraulic control reversing valve to the oil pump. A bypass oil path is connected to the oil path connecting the right-position commutation control oil port of the three-position four-way hydraulic control reversing valve to the oil pump. The bypass oil path is communicated with the oil tank, and the normally-open stop valve is arranged on the bypass oil path.

[0021] Optionally, a plurality of working cylinders are provided, and a plurality of three-position four-way electromagnetic reversing valves and three-position four-way hydraulic control reversing valves are provided respectively, and are in one-to-one correspondence with the plurality of working cylinders.

[0022] Optionally, a plurality of normally-closed stop valves, pressure reducing valves and normally-open stop valves are also provided respectively, and are in one-to-one correspondence with a plurality of working cylinders.

[0023] The present invention further provides a shaft tunneling machine, including a working cylinder and the above-mentioned shaft tunneling machine hydraulic control system.

[0024] Advantageous effects:

[0025] In the present invention, by designing a shaft tunneling machine hydraulic control system including an oil pump, an oil tank, a three-position four-way electromagnetic reversing valve, a three-position four-way hydraulic control reversing valve and a normally-closed stop valve, an emergency control oil path is composed of a hydraulic pump and a stop valve; a conventional control oil path is composed of a hydraulic pump and an electromagnetic reversing valve, and an execution oil path is composed of a hydraulic pump and a three-position four-way hydraulic control reversing valve. Thus, the left and right path switching of the three-position four-way hydraulic control reversing valve is controlled by the three-position four-way electromagnetic reversing valve, so that the three-position four-way hydraulic control reversing valve controls the extension and retraction of the working cylinder of the shaft tunneling machine. Moreover, an emergency control oil path for opening the right path of the three-position four-way hydraulic control reversing valve is additionally provided, and the normally-closed stop valve is arranged on this emergency control oil path. Thus, when the underground electrical system fails, opening this normally-closed stop valve can control the opening of the right path of the three-position four-way hydraulic control reversing valve to control the retraction of the working cylinder of the shaft tunneling machine, that is, to reset each actuator of the shaft tunneling machine to the posture allowing hoisting and lifting, so as to facilitate hoisting the shaft tunneling machine to the ground for maintenance.

[0026] That is to say, the present invention can use the electromagnetic reversing valve to independently control the commutation of the hydraulic control reversing valve respectively, or can use the remote emergency control oil path to make the hydraulic control reversing valve commutate simultaneously. To achieve the purpose that each cylinder can extend and retract independently during normal operation and each cylinder can be quickly and simply retracted to reset each actuator in case of electrical failure. Description of the drawings

[0027] Figure 1 It is a schematic structural diagram of the shaft tunneling machine hydraulic control system provided in Embodiment 1 of the present invention for controlling the extension of the working cylinder;

[0028] Figure 2 The structural schematic diagram of the hydraulic control system of the shaft tunneling machine provided in Embodiment 1 of the present invention for controlling the retraction of the working oil cylinder;

[0029] Figure 3 The structural schematic diagram of the hydraulic control system of the shaft tunneling machine provided in Embodiment 1 of the present invention for emergently controlling the retraction of the working oil cylinder in case of a failure of the underground electrical system. Specific embodiments

[0030] The technical solutions in the present invention will be clearly and completely described below with reference to the accompanying drawings in the present invention. Obviously, the described embodiments are only a part rather than all of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present invention without making creative efforts shall fall within the scope of the present invention.

[0031] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by terms such as "upper" is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of description and simplification, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention.

[0032] In the description of the present invention, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0033] In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, the terms "connected", "arranged", "installed", "fixed", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, and can be the internal communication of two elements. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0034] The present invention provides a hydraulic control system for a shaft tunneling machine, including:

[0035] An oil pump, an oil tank, a three-position four-way electromagnetic directional control valve, a three-position four-way hydraulic control directional control valve, and a normally closed stop valve,

[0036] The oil inlet of the three-position four-way electromagnetic directional control valve is communicated with the oil pump, the oil return port of the three-position four-way electromagnetic directional control valve is communicated with the oil tank, the first working oil port of the three-position four-way electromagnetic directional control valve is communicated with the left-position commutation control oil port of the three-position four-way hydraulic control directional control valve, and the second working oil port of the three-position four-way electromagnetic directional control valve is communicated with the right-position commutation control oil port of the three-position four-way hydraulic control directional control valve,

[0037] The inlet port of the three-position four-way hydraulic control directional valve is connected to the oil pump, the return port of the three-position four-way hydraulic control directional valve is connected to the fuel tank, the first working oil port of the three-position four-way hydraulic control directional valve is connected to the rodless cavity of the working cylinder of the shaft tunneling machine, and the second working oil port of the three-position four-way hydraulic control directional valve is connected to the rod cavity of the working cylinder of the shaft tunneling machine.

[0038] The right control oil port of the three-position four-way hydraulic control directional valve is also connected to the oil pump, and the normally closed stop valve is arranged on the oil path where the right control oil port of the three-position four-way hydraulic control directional valve is connected to the oil pump.

[0039] The oil pump is connected to the fuel tank.

[0040] When the left path of the three-position four-way electromagnetic directional valve is energized, the oil pump can pump the hydraulic oil in the system hydraulic oil path into the left control oil port of the three-position four-way hydraulic control directional valve through the left path of the three-position four-way electromagnetic directional valve, so as to open the left path of the three-position four-way hydraulic control directional valve. At the same time, the oil pump pumps the hydraulic oil in the system hydraulic oil path into the rodless cavity of the working cylinder through the left path of the three-position four-way hydraulic control directional valve, so as to extend the working cylinder.

[0041] When the right path of the three-position four-way electromagnetic directional valve is energized, the oil pump can pump the hydraulic oil in the system hydraulic oil path into the right control oil port of the three-position four-way hydraulic control directional valve through the right path of the three-position four-way electromagnetic directional valve, so as to open the right path of the three-position four-way hydraulic control directional valve. At the same time, the oil pump pumps the hydraulic oil in the system hydraulic oil path into the right rod cavity of the working cylinder through the right path of the three-position four-way hydraulic control directional valve, so as to retract the working cylinder.

[0042] When the three-position four-way electromagnetic directional valve is de-energized and in the middle position, the normally closed stop valve can be opened manually or automatically. The oil pump can pump the hydraulic oil in the system hydraulic oil path into the right control oil port of the three-position four-way hydraulic control directional valve, so as to open the right path of the three-position four-way hydraulic control directional valve. At the same time, the oil pump pumps the hydraulic oil in the system hydraulic oil path into the right rod cavity of the working cylinder through the right path of the three-position four-way hydraulic control directional valve, so as to retract the working cylinder.

[0043] The present invention also provides a shaft tunneling machine, including a working cylinder and the above-mentioned shaft tunneling machine hydraulic control system.

[0044] Embodiment 1:

[0045] As Figures 1 - 3 shown, this embodiment provides a shaft tunneling machine hydraulic control system, including:

[0046] an oil pump 100, a fuel tank, a three-position four-way electromagnetic directional valve 700, a three-position four-way hydraulic control directional valve 500, and a normally closed stop valve 200.

[0047] The oil inlet of the three-position four-way solenoid directional control valve 700 is connected to the oil pump 100, the oil return port of the three-position four-way solenoid directional control valve 700 is connected to the fuel tank, the first working oil port of the three-position four-way solenoid directional control valve 700 is connected to the left-position commutation control oil port of the three-position four-way hydraulic control directional control valve 500, and the second working oil port of the three-position four-way solenoid directional control valve 700 is connected to the right-position commutation control oil port of the three-position four-way hydraulic control directional control valve 500.

[0048] The oil inlet of the three-position four-way hydraulic control directional control valve 500 is connected to the oil pump 100, the oil return port of the three-position four-way hydraulic control directional control valve 500 is connected to the fuel tank, the first working oil port of the three-position four-way hydraulic control directional control valve 500 is connected to the rodless cavity of the working cylinder of the shaft tunneling machine, and the second working oil port of the three-position four-way hydraulic control directional control valve 500 is connected to the rod cavity of the working cylinder of the shaft tunneling machine.

[0049] The right-position control oil port of the three-position four-way hydraulic control directional control valve 500 is also connected to the oil pump 100, and a normally closed stop valve 200 is arranged on the oil path where the right-position commutation control oil port of the three-position four-way hydraulic control directional control valve 500 is connected to the oil pump 100.

[0050] The oil pump 100 is connected to the fuel tank.

[0051] As Figure 1 shown, when the left path of the three-position four-way solenoid directional control valve 700 is energized, the oil pump 100 can pump the hydraulic oil in the system hydraulic oil path into the left-position commutation control oil port of the three-position four-way hydraulic control directional control valve 500 through the left path of the three-position four-way solenoid directional control valve 700, so as to open the left path of the three-position four-way hydraulic control directional control valve 500. At the same time, the oil pump 100 pumps the hydraulic oil in the system hydraulic oil path into the rodless cavity of the working cylinder through the left path of the three-position four-way hydraulic control directional control valve 500, so as to extend the working cylinder.

[0052] As Figure 2 shown, when the right path of the three-position four-way solenoid directional control valve 700 is energized, the oil pump 100 can pump the hydraulic oil in the system hydraulic oil path into the right-position control oil port of the three-position four-way hydraulic control directional control valve 500 through the right path of the three-position four-way solenoid directional control valve 700, so as to open the right path of the three-position four-way hydraulic control directional control valve 500. At the same time, the oil pump 100 pumps the hydraulic oil in the system hydraulic oil path into the right rod cavity of the working cylinder through the right path of the three-position four-way hydraulic control directional control valve 500, so as to retract the working cylinder.

[0053] As Figure 3 shown, when the three-position four-way solenoid directional control valve 700 is de-energized and in the middle position, the normally closed stop valve 200 can be manually or automatically opened. The oil pump 100 can pump the hydraulic oil in the system hydraulic oil path into the right-position control oil port of the three-position four-way hydraulic control directional control valve 500, so as to open the right path of the three-position four-way hydraulic control directional control valve 500. At the same time, the oil pump 100 pumps the hydraulic oil in the system hydraulic oil path into the right rod cavity of the working cylinder through the right path of the three-position four-way hydraulic control directional control valve 500, so as to retract the working cylinder.

[0054] Thus, by designing a hydraulic control system for a shaft tunneling machine including an oil pump 100, an oil tank, a three-position four-way electromagnetic directional control valve 700, a three-position four-way hydraulically controlled directional control valve 500, and a normally closed stop valve 200, an emergency control oil circuit is composed of the hydraulic pump 100 and the stop valve 200; a conventional control oil circuit is composed of the hydraulic pump 100 and the electromagnetic directional control valve 700, and an execution oil circuit is composed of the hydraulic pump 100 and the three-position four-way hydraulically controlled directional control valve 500. Thus, the conventional control oil circuit can be selectively communicated with the left or right position reversing control port of the three-position four-way hydraulically controlled directional control valve 500 through the three-position four-way electromagnetic directional control valve 700 to control the three-position four-way hydraulically controlled directional control valve 500 to be in the left or right position. The three-position four-way hydraulically controlled directional control valve 500 of the execution oil circuit is communicated with the oil port of the working cylinder. When the three-position four-way hydraulically controlled directional control valve 500 is in the left position, the working cylinder extends, and when the three-position four-way hydraulically controlled directional control valve 500 is in the right position, the working cylinder retracts. Thus, the extension and retraction of the working cylinder of the shaft tunneling machine are controlled by the three-position four-way hydraulically controlled directional control valve 500. Moreover, an emergency control oil circuit for opening the right path of the three-position four-way hydraulically controlled directional control valve is additionally provided, and the normally closed stop valve 200 is arranged on this emergency control oil circuit. Thus, when a downhole electrical system fails, by opening the normally closed stop valve 200, the right path of the three-position four-way hydraulically controlled directional control valve can be controlled to open, so as to control the working cylinder of the shaft tunneling machine to retract, that is, to reset each actuator of the shaft tunneling machine to a posture allowing hoisting and lifting, thereby facilitating the hoisting of the shaft tunneling machine to the ground for maintenance.

[0055] That is to say, the present invention can control the independent commutation of the three-position four-way hydraulically controlled directional control valve 500 by using the three-position four-way electromagnetic directional control valve 700, or can also use a remote emergency control oil circuit to make the three-position four-way hydraulically controlled directional control valve 500 commutate simultaneously. The purpose is to achieve the independent extension and retraction of each working cylinder during normal operation and the quick and simple retraction of each working cylinder in case of electrical failure to reset each actuator.

[0056] Specifically, the normally closed stop valve 200 is arranged above the well and can be manually opened when a downhole electrical system failure is found, or the normally closed stop valve 200 can be electrically connected to the controller of the shaft tunneling machine and automatically opened by the controller when the controller obtains a downhole electrical system failure.

[0057] It can be understood that the three-position four-way electromagnetic directional control valve 700 is electrically connected to the controller of the shaft tunneling machine, and the left and right path switching of the three-position four-way electromagnetic directional control valve 700 is controlled by the controller of the shaft tunneling machine.

[0058] In this embodiment, a shuttle valve 600 is further included. The shuttle valve 600 is simultaneously located on the oil circuit where the second working oil port of the three-position four-way electromagnetic directional control valve 700 is communicated with the right position reversing control oil port of the three-position four-way hydraulically controlled directional control valve 500, and on the oil circuit where the right position reversing control oil port of the three-position four-way hydraulically controlled directional control valve 500 is communicated with the oil pump 100.

[0059] The left oil inlet of the shuttle valve 600 is communicated with the second working oil port of the three-position four-way electromagnetic directional control valve 700. The right oil inlet of the shuttle valve 600 is communicated with the oil pump 100. The oil outlet of the shuttle valve 600 is communicated with the right control oil port of the three-position four-way hydraulic control directional control valve 500.

[0060] It can be understood that the emergency control oil circuit and the conventional control oil circuit are isolated by the shuttle valve 600, and the shuttle valve 600 is used to switch the oil circuits for controlling the opening of the three-position four-way hydraulic control directional control valve 500 in two ways. This is not only safe and reliable, but also reduces the pipeline layout and is more suitable for the narrow space underground.

[0061] In this embodiment, a pressure reducing valve 300 is further included. The pressure reducing valve 300 is located on the oil path where the right-position reversing control oil port of the three-position four-way hydraulic control directional control valve 500 is communicated with the oil pump 100.

[0062] The reversing speed of the hydraulic control directional control valve is adjusted by adjusting the pressure of the pressure reducing valve 300 to reduce the hydraulic shock during reversing, so as to ensure the smooth reset of the mechanism during emergency operation.

[0063] In this embodiment, a normally open stop valve 800 is further included. A bypass oil path is connected to the oil path where the right-position reversing control oil port of the three-position four-way hydraulic control directional control valve 500 is communicated with the oil pump 100. The bypass oil path is communicated with the oil tank, and the normally open stop valve 800 is arranged on the bypass oil path.

[0064] That is, a normally closed stop valve and a normally open stop valve are arranged in the emergency control oil circuit to prevent abnormal operation of the whole machine caused by misoperation of the stop valve.

[0065] In this embodiment, there are multiple working cylinders. The three-position four-way electromagnetic directional control valve 700, the three-position four-way hydraulic control directional control valve 500, and the shuttle valve 600 are respectively provided with multiple ones, and are in one-to-one correspondence with the multiple working cylinders.

[0066] It can be understood that the emergency control oil circuit of this embodiment is simultaneously communicated with the right-position reversing control ports of the three-position four-way hydraulic control directional control valves 500 of each working cylinder, and can simultaneously control the three-position four-way hydraulic control directional control valves 500 to be in the right position. The hydraulic oil simultaneously enters the rodless cavities of each working cylinder, and pushes each working cylinder to retract simultaneously, so as to achieve the purpose of resetting all mechanisms with as few pipelines as possible.

[0067] The following further describes the present invention by taking the action of the latch cylinder of a shaft tunneling machine as an example. The principle of the electrical control cylinder extending is shown in Figure 1 , as Figure 1The components shown are as follows: hydraulic pump 100, globe valve 200, pressure reducing valve 300, pin cylinder 400, three-position four-way hydraulic control directional valve 500, shuttle valve 600, three-position four-way solenoid directional valve 700, globe valve 800. When the left side of the three-position four-way solenoid directional valve 700 is energized, the hydraulic oil is connected to the left control port 501 of the three-position four-way hydraulic control directional valve 500 through its first working oil port 701, causing the three-position four-way hydraulic control directional valve 500 to be in the left position. At the same time, the high-pressure oil pumped out by the hydraulic pump 100 enters the rodless cavity 401 of the pin cylinder through the inlet port 503 of the three-position four-way hydraulic control directional valve 500, pushing the pin cylinder to extend. At this time, the normally closed globe valve 200 is in the closed state, and the normally open globe valve 800 is in the open state.

[0068] The principle of the electric control cylinder recovery is shown in Figure 2 , at this time, the right side of the three-position four-way solenoid directional valve 700 is energized, the hydraulic oil enters the left inlet port 601 of the shuttle valve 600 through the second working oil port 702 of the three-position four-way solenoid directional valve 700, and then comes out from the outlet port 603 of the shuttle valve 600, connecting to the right control port 502 of the three-position four-way hydraulic control directional valve 500, causing the three-position four-way hydraulic control directional valve 500 to be in the right position. At the same time, the high-pressure oil pumped out by the hydraulic pump 100 enters the rod cavity 402 of the pin cylinder through the inlet port 503 of the three-position four-way hydraulic control directional valve 500, pushing the pin cylinder to retract.

[0069] The principle of the emergency operation control cylinder recovery is shown in Figure 3 , at this time, the three-position four-way solenoid directional valve 700 is de-energized and in the middle position, opening the normally closed globe valve 200 and closing the normally open globe valve 800. The high-pressure oil at the outlet of the oil pump 100 passes through the normally closed globe valve 200, pressure reducing valve 300, the right inlet port 602 of the shuttle valve 600, and the outlet port 603 of the shuttle valve 600 to connect to the right control port 502 of the three-position four-way hydraulic control directional valve 500, causing the three-position four-way hydraulic control directional valve 500 to be in the right position. At the same time, the high-pressure oil from the hydraulic pump 100 enters the rod cavity 402 of the pin cylinder through the inlet port 503 of the three-position four-way hydraulic control directional valve 500, pushing the pin cylinder to retract.

[0070] Similarly, since the pressure reducing valve 300 is simultaneously connected to the shuttle valves corresponding to the swing cylinder of the cutting arm, the telescopic cylinder of the cutting arm, and the lifting cylinder of the main bin respectively, the other three-position four-way hydraulic control directional valves corresponding to the swing cylinder of the cutting arm, the telescopic cylinder of the cutting arm, and the lifting cylinder of the main bin are also simultaneously in the right position. The hydraulic oil enters the rod cavities of the swing cylinder of the cutting arm, the telescopic cylinder of the cutting arm, and the lifting cylinder of the main bin at the same time, pushing the swing cylinder of the cutting arm, the telescopic cylinder of the cutting arm, and the lifting cylinder of the main bin to retract synchronously with the pin cylinder, so as to achieve the purpose of resetting all mechanisms with as few pipelines as possible.

[0071] Adjust the commutation speed of the hydraulic control directional valve by adjusting the pressure of the pressure reducing valve 300 to reduce the hydraulic shock during commutation and ensure the stable reset of the mechanism during emergency operation.

[0072] In other embodiments, a plurality of normally closed stop valves 200, pressure reducing valves 300 and normally open stop valves 800 may also be provided respectively, and correspond to a plurality of working cylinders one by one.

[0073] Embodiment 2:

[0074] This embodiment provides a shaft tunneling machine, including a shaft tunneling machine, which has a working cylinder and the shaft tunneling machine hydraulic control system of Embodiment 1.

[0075] The working cylinders of the shaft tunneling machine include, but are not limited to, pin cylinders, cutting arm swing cylinders, cutting arm telescopic cylinders and main bin lifting cylinders.

[0076] It can be understood that the above embodiments are merely exemplary embodiments adopted to illustrate the principle of the present invention. However, the present invention is not limited thereto. For those of ordinary skill in the art, various modifications and improvements can be made without departing from the spirit and essence of the present invention, and these modifications and improvements are also regarded as the protection scope of the present invention.

Claims

1. A hydraulic control system for a shaft tunneling machine, characterized in that, Including: An oil pump (100), an oil tank, a three-position four-way electromagnetic directional control valve (700), a three-position four-way hydraulic control directional control valve (500), and a normally closed stop valve (200). The oil inlet of the three-position four-way electromagnetic directional control valve (700) is communicated with the oil pump (100), the oil return port of the three-position four-way electromagnetic directional control valve (700) is communicated with the oil tank, the first working oil port of the three-position four-way electromagnetic directional control valve (700) is communicated with the left-position commutation control oil port of the three-position four-way hydraulic control directional control valve (500), the second working oil port of the three-position four-way electromagnetic directional control valve (700) is communicated with the right-position commutation control oil port of the three-position four-way hydraulic control directional control valve (500), the oil inlet of the three-position four-way hydraulic control directional control valve (500) is communicated with the oil pump (100), the oil return port of the three-position four-way hydraulic control directional control valve (500) is communicated with the oil tank, the first working oil port of the three-position four-way hydraulic control directional control valve (500) is communicated with the rodless cavity of the working cylinder of the shaft tunneling machine, the second working oil port of the three-position four-way hydraulic control directional control valve (500) is communicated with the rod cavity of the working cylinder of the shaft tunneling machine, the right-position control oil port of the three-position four-way hydraulic control directional control valve (500) is also communicated with the oil pump (100), the normally closed stop valve (200) is arranged on the oil path where the right-position commutation control oil port of the three-position four-way hydraulic control directional control valve (500) is communicated with the oil pump (100), the oil pump (100) is communicated with the oil tank. When the left path of the three-position four-way electromagnetic directional control valve (700) is energized, the oil pump (100) can pump the hydraulic oil in the system hydraulic oil path into the left-position commutation control oil port of the three-position four-way hydraulic control directional control valve (500) through the left path of the three-position four-way electromagnetic directional control valve (700), so as to open the left path of the three-position four-way hydraulic control directional control valve (500). At the same time, the oil pump (100) pumps the hydraulic oil in the system hydraulic oil path into the rodless cavity of the working cylinder through the left path of the three-position four-way hydraulic control directional control valve (500), so as to extend the working cylinder. When the right path of the three-position four-way electromagnetic directional control valve (700) is energized, the oil pump (100) can pump the hydraulic oil in the system hydraulic oil path into the right-position control oil port of the three-position four-way hydraulic control directional control valve (500) through the right path of the three-position four-way electromagnetic directional control valve (700), so as to open the right path of the three-position four-way hydraulic control directional control valve (500). At the same time, the oil pump (100) pumps the hydraulic oil in the system hydraulic oil path into the right rod cavity of the working cylinder through the right path of the three-position four-way hydraulic control directional control valve (500), so as to retract the working cylinder. When the three-position four-way electromagnetic directional control valve (700) is de-energized and in the middle position, the normally closed stop valve (200) can be manually or automatically opened. The oil pump (100) can pump the hydraulic oil in the system hydraulic oil path into the right-position control oil port of the three-position four-way hydraulic control directional control valve (500), so as to open the right path of the three-position four-way hydraulic control directional control valve (500). At the same time, the oil pump (100) pumps the hydraulic oil in the system hydraulic oil path into the right rod cavity of the working cylinder through the right path of the three-position four-way hydraulic control directional control valve (500), so as to retract the working cylinder; It further includes: a shuttle valve (600), which is located on the oil path where the second working oil port of the three-position four-way electromagnetic directional control valve (700) is communicated with the right-position reversing control oil port of the three-position four-way hydraulically controlled directional control valve (500), and on the oil path where the right-position reversing control oil port of the three-position four-way hydraulically controlled directional control valve (500) is communicated with the oil pump (100). The left oil inlet of the shuttle valve (600) is communicated with the second working oil port of the three-position four-way electromagnetic directional control valve (700), the right oil inlet of the shuttle valve (600) is communicated with the oil pump (100), and the oil outlet of the shuttle valve (600) is communicated with the right-position control oil port of the three-position four-way hydraulically controlled directional control valve (500). It further includes: a pressure reducing valve (300) and a normally open stop valve (800). The pressure reducing valve (300) is located on the oil path where the right-position reversing control oil port of the three-position four-way hydraulically controlled directional control valve (500) is communicated with the oil pump (100). A bypass oil path is connected to the oil path where the right-position reversing control oil port of the three-position four-way hydraulically controlled directional control valve (500) is communicated with the oil pump (100), and the bypass oil path is communicated with the fuel tank. The normally open stop valve (800) is arranged on the bypass oil path.

2. The hydraulic control system of the shaft tunneling machine according to claim 1, wherein It further includes a pressure reducing valve (300), which is located on the oil path where the right-position reversing control oil port of the three-position four-way hydraulically controlled directional control valve (500) is communicated with the oil pump (100).

3. The hydraulic control system of the shaft tunneling machine according to claim 2, characterized in that, It further includes a normally open stop valve (800). A bypass oil path is connected to the oil path where the right-position reversing control oil port of the three-position four-way hydraulically controlled directional control valve (500) is communicated with the oil pump (100), and the bypass oil path is communicated with the fuel tank. The normally open stop valve (800) is arranged on the bypass oil path.

4. The hydraulic control system of the shaft tunneling machine according to claim 3, characterized in that, There are multiple working cylinders, and multiple three-position four-way electromagnetic directional control valves (700), multiple three-position four-way hydraulically controlled directional control valves (500) and multiple shuttle valves (600) are respectively provided, and they correspond to the multiple working cylinders one by one.

5. The hydraulic control system of the shaft tunneling machine according to claim 4, wherein Multiple normally closed stop valves (200), pressure reducing valves (300) and normally open stop valves (800) are also respectively provided, and they correspond to the multiple working cylinders one by one.

6. The hydraulic control system of the shaft tunneling machine according to claim 5, characterized in that, There are multiple working cylinders, and multiple three-position four-way electromagnetic directional control valves (700) and multiple three-position four-way hydraulically controlled directional control valves (500) are respectively provided, and they correspond to the multiple working cylinders one by one.

7. The hydraulic control system of the shaft tunneling machine according to claim 6, characterized in that, Multiple normally closed stop valves (200), pressure reducing valves (300) and normally open stop valves (800) are also respectively provided, and they correspond to the multiple working cylinders one by one.

8. A shaft tunneling machine, including working cylinders, and a shaft tunneling machine hydraulic control system as described in any one of claims 1-7.

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