A multi-state interlocking hydraulic control valve and control method for anchor digging machine

Abstract

The present invention discloses a multi-state interlocking hydraulic control valve for an anchor miner and a control method thereof, comprising a valve block, wherein an oil inlet P of the valve block is communicated with an oil outlet B1, an oil outlet B2, an oil inlet of a first electromagnetic one-way valve, an oil inlet of a second electromagnetic one-way valve, and an oil inlet of a pressure reducing valve; the oil outlet of the first electromagnetic one-way valve is communicated with an oil outlet A of the valve block; the oil outlet of the second electromagnetic one-way valve is communicated with an oil outlet C of the valve block; the oil outlet of the pressure reducing valve is communicated with the oil inlets of the relief valve and the one-way valve; the oil outlet of the one-way valve is communicated with an accumulator and an X1 port of the first electromagnetic reversing valve; the X2 port of the first electromagnetic reversing valve is communicated with an oil outlet M of the valve block; and an oil drain port T of the valve block is communicated with an oil drain port Y1 of the first electromagnetic one-way valve, an oil drain port Y2 of the second electromagnetic one-way valve, an oil drain port of the pressure reducing valve, an oil outlet of the relief valve, and an X3 port of the first electromagnetic reversing valve. It has high integration, high degree of automation, simple operation, and can realize interlocking of two working states.

Description

Technical Field

[0001] The present invention belongs to the technical field of hydraulic control of coal mine mechanical equipment, and in particular relates to a multi-state interlocking hydraulic control valve for an anchor miner and a control method thereof. Background Art

[0002] The existing anchor boring machines, which are based on traditional tunnel boring machines and have integrated functions, have three working states, namely, tunneling state, temporary support state, and drilling rig support state. From a safety perspective, the three states need to be interlocked in pairs, that is, when one state is working, the actuators of the other two states must be unable to operate.

[0003] The commonly used method at present is to select multiple hydraulic valves and complex pipeline connections, and manually select and control different hydraulic valves. This method inevitably has problems such as complex control, low degree of automation, many failure points, cumbersome operation and high manual familiarity. It is inefficient and has safety hazards. Summary of the Invention

[0004] The object of the present invention is to provide a multi-state interlocking hydraulic control valve and a control method for an anchor miner to solve the above technical problems.

[0005] The present invention provides a multi-state interlocking hydraulic control valve for an anchor miner, comprising a valve block, a first electromagnetic one-way valve, a second electromagnetic one-way valve, a pressure reducing valve, a relief valve, a one-way valve, a first electromagnetic reversing valve, and an accumulator. The valve block is provided with an oil inlet P, an oil outlet A, an oil outlet B1, an oil outlet B2, an oil outlet C, an oil outlet M, and an oil drain port T. The oil inlet P of the valve block is communicated with the oil outlet B1, the oil outlet B2, the oil inlet of the first electromagnetic one-way valve, the oil inlet of the second electromagnetic one-way valve, and the oil inlet of the pressure reducing valve. The oil outlet of the first electromagnetic one-way valve is communicated with the oil outlet A of the valve block. The oil outlet of the second solenoid check valve is communicated with the oil outlet C of the valve block, the oil outlet of the pressure reducing valve is communicated with the oil inlet of the relief valve and the check valve, the oil outlet of the check valve is communicated with the accumulator and the X1 port of the first solenoid reversing valve, the X2 port of the first solenoid reversing valve is communicated with the oil outlet M of the valve block, the oil drain port T of the valve block is communicated with the oil drain port Y1 of the first solenoid check valve, the oil drain port Y2 of the second solenoid check valve, the oil drain port of the pressure reducing valve, the oil outlet of the relief valve, and the X3 port of the first solenoid reversing valve, and the first solenoid reversing valve is switched to connect the X2 port with the X3 port or the X1 port with the X2 port.

[0006] Furthermore, a high-pressure filter is included, one end of which is connected to the oil inlet P of the valve block.

[0007] Furthermore, the multi-state interlocking hydraulic control valve of the anchor boring machine is located between the power source pump and the multi-way valve. The multi-way valve includes an excavation multi-way valve, a temporary support multi-way valve and a drilling rig support multi-way valve. One end of the high-pressure filter is connected to the outlet of the power source pump, and the other end is connected to the oil inlet P of the valve block. The oil outlets B1 and B2 of the valve block are connected to the oil inlet of the excavation multi-way valve, the oil outlet A of the valve block is connected to the oil inlet of the temporary support multi-way valve, the oil outlet C of the valve block is connected to the oil inlet of the drilling rig support multi-way valve, the oil outlet M of the valve block is connected to the oil inlet of the excavation pilot handle, and the oil drain port T of the valve block is connected back to the oil tank.

[0008] Furthermore, the oil outlet A, the oil outlet B1, the oil outlet B2, the oil outlet C and the oil drain port T on the valve block are located on the same end surface of the valve block.

[0009] Furthermore, the first electromagnetic one-way valve and the second electromagnetic one-way valve are both composed of a hydraulically controlled one-way valve and a second electromagnetic reversing valve, and are plate-type connection structures.

[0010] Furthermore, when the second solenoid reversing valve is in a power-off state, the pressure of the hydraulic control port of the hydraulic control one-way valve is equal to the oil inlet pressure, blocking the oil circuits of the oil outlet A and the oil outlet C of the valve block; when the second solenoid reversing valve is in a power-on state, the hydraulic control port of the hydraulic control one-way valve is connected to the Y1 port and the Y2 port and connected back to the oil tank, and the oil circuits of the oil outlet A and the oil outlet C of the valve block are opened.

[0011] Furthermore, the pressure reducing valve is a constant pressure pressure reducing valve, the overflow valve is a safety valve, and the set pressure is slightly higher than the set pressure of the pressure reducing valve.

[0012] Furthermore, when the first electromagnetic reversing valve is in a power-off state, the X2 port is connected to the X3 port, and when it is in a power-on state, the X1 port is connected to the X2 port.

[0013] The multi-state interlocking hydraulic control valve for anchor miners of the present invention has the following beneficial effects:

[0014] 1. Integrates high-pressure filters and multiple control logic valves into one, realizing a high degree of integration of hydraulic components between the pump and the multi-way valve, taking up little space, with simple connection pipes and easy maintenance.

[0015] 2. It can be widely used in various types of anchor boring machines or airborne multi-functional tunnel boring machines to meet the pressure and flow requirements of various models.

[0016] 3. Realize the interlocking between multiple working states of the anchor miner.

[0017] The present invention also provides a multi-state interlocking hydraulic control valve control method for an anchor miner. The controller selects a working state by controlling a first solenoid one-way valve, a second solenoid one-way valve and a first solenoid reversing valve. When the excavation state is selected, the controller controls the first solenoid one-way valve and the second solenoid one-way valve to be in a de-energized normally closed state, the first solenoid reversing valve to be in an energized state, and the X1 port is connected to the X2 port; when the temporary support state is selected, the controller controls the energized oil outlet port A of the first solenoid one-way valve to be connected, the second solenoid one-way valve to be in a de-energized normally closed state, the first solenoid reversing valve to be in a de-energized state, and the X2 port to be connected to the X3 port; when the drilling rig support state is selected, the controller controls the energized oil outlet port C of the second solenoid one-way valve to be connected, the first solenoid one-way valve to be in a de-energized normally closed state, the first solenoid reversing valve to be in a de-energized state, and the X2 port to be connected to the X3 port.

[0018] Furthermore, the anchor miner can be operated by manual handle and remote control in the excavation state. The two operation modes are locked to each other. When the anchor miner is adjusted to the temporary support state or the drilling rig support state, the controller controls the excavation remote control signal not to be transmitted.

[0019] The method for controlling a multi-state interlocking hydraulic control valve of an anchor miner according to the present invention has the following beneficial effects:

[0020] It has a high degree of automation and is easy to operate. Underground workers do not need to be familiar with complex switching logic. They only need to adjust the knob to the corresponding working mode to achieve safety interlocking. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a hydraulic principle diagram of the multi-state interlocking hydraulic control valve of the anchor miner of the present invention;

[0022] Figure 2 This is a schematic structural diagram of a multi-state interlocking hydraulic control valve for an anchor miner according to the present invention;

[0023] Figure 3 This is a front view of the multi-state interlocking hydraulic control valve for an anchor miner according to the present invention;

[0024] Figure 4 This is a rear view of the multi-state interlocking hydraulic control valve for an anchor miner according to the present invention.

[0025] In the figure: 1-valve block, 2-high pressure filter, 3-first solenoid one-way valve, 4-second solenoid one-way valve, 5-pressure reducing valve, 6-overflow valve, 7-one-way valve, 8-first solenoid reversing valve, 9-accumulator. DETAILED DESCRIPTION

[0026] In order to better understand the purpose, structure and function of the present invention, the following is a further detailed description of a multi-state interlocking hydraulic control valve and control method for an anchor miner of the present invention in conjunction with the accompanying drawings.

[0027] like Figures 1 to 4 As shown, a multi-state interlocking hydraulic control valve for an anchor mining machine includes a valve block 1, a high-pressure filter 2, a first electromagnetic one-way valve 3, a second electromagnetic one-way valve 4, a pressure reducing valve 5, a relief valve 6, a one-way valve 7, a first electromagnetic reversing valve 8, and an accumulator 9. The valve block 1 is provided with an oil inlet P, an oil outlet A, an oil outlet B1, an oil outlet B2, an oil outlet C, an oil outlet M, and an oil drain port T. One end of the high-pressure filter 2 is connected to the oil inlet P of the valve block 1, and the oil inlet P of the valve block 1 is in communication with the oil outlet B1, the oil outlet B2, the oil inlet of the first electromagnetic one-way valve 3, the oil inlet of the second electromagnetic one-way valve 4, and the oil inlet of the pressure reducing valve 5. The oil outlet of the first electromagnetic one-way valve 3 is in communication with the oil outlet A of the valve block 1, the oil outlet of the second electromagnetic one-way valve 4 is in communication with the oil outlet C of the valve block 1, and the oil outlet of the pressure reducing valve 5 is in communication with the oil outlet The oil inlet of valve 6 communicates with the oil inlet of check valve 7. The oil outlet of check valve 7 communicates with accumulator 9 and port X1 of first solenoid reversing valve 8. Port X2 of first solenoid reversing valve 8 communicates with oil outlet M of valve block 1. The oil drain port T of valve block 1 communicates with oil drain port Y1 of first solenoid check valve 3, oil drain port Y2 of second solenoid check valve 4, the oil drain port of pressure reducing valve 5, the oil outlet of relief valve 6, and port X3 of first solenoid reversing valve 8. Pressure reducing valve 5 is a constant-pressure pressure reducing valve, ensuring a stable, low pilot oil supply pressure. Relief valve 6 is a safety valve with a set pressure slightly higher than that of pressure reducing valve 5. When first solenoid reversing valve 8 is de-energized, ports X2 and X3 are connected; when energized, ports X1 and X2 are connected.

[0028] Most anchor miners utilize a load-sensing hydraulic system. The multi-state interlocking hydraulic control valve is located between the load-sensing pump and the multi-way valve. The tunneling multi-way valve controls the tunneling function of the entire machine, the temporary support multi-way valve controls the temporary support function, and the drilling support multi-way valve controls the drilling support function. One end of the high-pressure filter 2 is connected to the outlet of the load-sensing pump, and the other end is connected to the oil inlet P of the valve block 1. The tunneling multi-way valve controls a variety of functions and requires a large flow rate. It typically has multiple sets of multi-way valves. Outlets B1 and B2 of valve block 1 are connected to the inlets of multiple tunneling multi-way valves, or the port connection can be adjusted based on the specific machine model. Different models of anchor miners require multiple sets of tunneling multi-way valves for tunneling operation. The number of tunneling multi-way valves connected to outlets B1 and B2 can be adjusted appropriately based on the operating flow rate. The oil outlet A of the valve block 1 is connected to the oil inlet of the temporary support multi-way valve; the oil outlet C of the valve block 1 is connected to the oil inlet of the drilling rig support multi-way valve; the oil outlet M of the valve block 1 is connected to the oil inlet of the excavation pilot handle; the oil drain port T of the valve block 1 is connected back to the oil tank.

[0029] The multi-state interlocking hydraulic control valve for the anchor digger of the present invention integrates hydraulic components such as the high-pressure filter 2 between the pump and the multi-way valve, meeting the requirements for interlocking between the excavation state, temporary support state, and drilling rig support state of the anchor digger. It can be integrated and applied on various types of anchor diggers and airborne multi-functional tunneling machines to meet the pressure and flow required by the airborne equipment, achieve high integration of the hydraulic system, save space, simplify operation, reduce failure rate, and facilitate better promotion and application of anchor digging equipment.

[0030] As a preferred embodiment, in order to meet the underground explosion-proof requirements and the conditions of large-flow and high-pressure oil circuits, the first solenoid check valve 3 and the second solenoid check valve 4 are both composed of a hydraulically controlled check valve and a second electromagnetic reversing valve, and are plate-type connection structures. When the power is off, the hydraulic control port of the hydraulically controlled check valve is equal to the oil inlet pressure, and the oil outlet A of the valve block 1 and the oil outlet C of the valve block 1 are cut off. When the power is on, the hydraulic control port of the hydraulically controlled check valve is connected to the Y1 port and the Y2 port respectively and connected back to the oil tank, and the oil outlet A of the valve block 1 and the oil outlet C of the valve block 1 are connected.

[0031] The present invention provides a method for controlling a multi-state interlocked hydraulic control valve for an anchor miner. A controller controls the first solenoid check valve 3, the second solenoid check valve 4, and the first solenoid reversing valve 8. The controller selects the operating state using a knob on the anchor miner's operating console. When the excavation state is selected, the controller controls the first and second solenoid check valves 3 and 4 to their normally closed, de-energized states, and the first solenoid reversing valve 8 to its energized state, connecting ports X1 and X2. High-pressure oil enters the oil inlet P of the valve block 1 through the high-pressure filter 2, and supplies oil to the excavation multi-way valve through the oil outlets B1 and B2 of the valve block 1. Simultaneously, the high-pressure oil passes through the pressure reducing valve 5, the check valve 7, ports X1 and X2 of the first solenoid reversing valve 8, and the oil outlet M of the valve block 1, and, together with the accumulator 9, supplies oil to the excavation pilot handle, ensuring the machine operates in the excavation state.

[0032] When the temporary support state is selected, the controller controls the first solenoid check valve 3 to open the oil circuit at outlet A when energized, the second solenoid check valve 4 to a normally closed state when de-energized, the first solenoid reversing valve 8 to a de-energized state, and ports X2 and X3 to communicate. High-pressure oil enters valve block 1's oil inlet port P through high-pressure filter 2, supplies the temporary support multi-way valve through outlet A of valve block 1, and supplies the tunneling multi-way valve through outlets B1 and B2 of valve block 1. Simultaneously, high-pressure oil passes through pressure reducing valve 5 and check valve 7 to charge accumulator 9. At this point, the temporary support multi-way valve is supplied with oil and can be operated by its own hydraulic control handle or electronic remote control, completing the temporary support state. Although the tunneling multi-way valve is also supplied with oil, the tunneling pilot handle is not, so all tunneling functions are inoperative.

[0033] When the drilling rig support mode is selected, the controller controls the oil circuit at the energized oil outlet C of the second solenoid check valve 4, opens the oil circuit, and the first solenoid check valve 3 is in the de-energized normally closed state. The first solenoid reversing valve 8 is in the de-energized state, connecting ports X2 and X3. High-pressure oil enters the oil inlet P of valve block 1 through the high-pressure filter 2, supplies the drilling rig support multi-way valve through the oil outlet C of valve block 1, and supplies the oil to the tunneling multi-way valve through the oil outlets B1 and B2 of valve block 1. Simultaneously, high-pressure oil passes through the pressure reducing valve 5 and the check valve 7 to charge the accumulator 9. At this point, the drilling rig support multi-way valve is supplied with oil and can be operated by its own hydraulic control handle or electronic remote control, completing the drilling rig support mode. Although the tunneling multi-way valve is also supplied with oil, the tunneling pilot handle is not, so all tunneling functions are inoperative.

[0034] When a machine failure causes a power outage, the first solenoid one-way valve 3 and the second solenoid one-way valve 4 are in the normally closed state, the first solenoid reversing valve 8 is in the power-off state, the X2 port is connected to the X3 port, and the excavation state, temporary support state, and drilling rig support state cannot be operated.

[0035] The bolter miner can operate in either manual or remote control mode. During manual operation, the hydraulically controlled tunneling pilot handle manually controls the movement of the tunneling multi-way valve spool. During remote operation, the electrically controlled tunneling remote control remotely controls the movement of the electro-hydraulic tunneling multi-way valve spool. The two operating modes are interlocked. That is, when manual operation is selected, the controller must also prevent the tunneling remote control signal from being transmitted. When remote operation is selected, the controller must also de-energize the first solenoid reversing valve 8, cutting off the oil supply to the tunneling pilot handle.

[0036] Underground tunneling is usually operated manually. Cutting off the oil supply to the tunneling pilot handle can lock the tunneling function, rendering it inoperable. If tunneling is operated both manually and remotely, when the anchor miner is switched to temporary support or drilling support, in addition to de-energizing the first electromagnetic reversing valve 8, the controller must also prevent the transmission of tunneling remote control signals.

[0037] It will be understood that the present invention is described by way of some embodiments, and it will be appreciated by those skilled in the art that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the teachings of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are intended to be protected by the present invention.

Claims

1. A multi-state interlocking hydraulic control valve for an anchor miner, characterized in that: The oil inlet P of the valve block is connected to the oil outlet B1, the oil outlet B2, the oil inlet of the first electromagnetic one-way valve, the oil inlet of the second electromagnetic one-way valve and the oil inlet of the pressure reducing valve. The oil outlet of the first electromagnetic one-way valve is connected to the oil outlet A of the valve block, and the oil outlet of the second electromagnetic one-way valve is connected to the oil outlet C of the valve block. The oil outlet C of the valve block is connected, the oil outlet of the pressure reducing valve is connected to the oil inlet of the relief valve and the one-way valve, the oil outlet of the one-way valve is connected to the accumulator and the X1 port of the first solenoid reversing valve, the X2 port of the first solenoid reversing valve is connected to the oil outlet M of the valve block, the oil drain port T of the valve block is connected to the oil drain port Y1 of the first solenoid one-way valve, the oil drain port Y2 of the second solenoid one-way valve, the oil drain port of the pressure reducing valve, the oil outlet of the relief valve, and the X3 port of the first solenoid reversing valve, and the first solenoid reversing valve is switched to connect the X2 port with the X3 port or the X1 port with the X2 port, including High-pressure filter, one end of the high-pressure filter is connected to the oil inlet P of the valve block, the multi-state interlocking hydraulic control valve of the anchor mining machine is located between the power source pump and the multi-way valve, the multi-way valve includes the excavation multi-way valve, the temporary support multi-way valve and the drilling rig support multi-way valve, one end of the high-pressure filter is connected to the outlet of the power source pump, and the other end is connected to the oil inlet P of the valve block, the oil outlet B1 and the oil outlet B2 of the valve block are connected to the oil inlet of the excavation multi-way valve, the oil outlet A of the valve block is connected to the oil inlet of the temporary support multi-way valve, the oil outlet C of the valve block is connected to the oil inlet of the drilling rig support multi-way valve, the oil outlet of the valve block M is connected to the oil inlet of the excavation pilot handle, and the oil drain port T of the valve block is connected back to the oil tank. The first solenoid check valve and the second solenoid check valve are both composed of a hydraulically controlled check valve and a second solenoid reversing valve, and are a plate-type connection structure. When the second solenoid reversing valve is in a power-off state, the hydraulic control port of the hydraulically controlled check valve is equal to the pressure of the oil inlet, blocking the oil outlet A of the valve block and the oil outlet C of the valve block; when the second solenoid reversing valve is in a power-on state, the hydraulic control port of the hydraulically controlled check valve is connected to the Y1 port and the Y2 port respectively and connected back to the oil tank, and the oil outlet A of the valve block and the oil outlet C of the valve block are connected.

2. The multi-state interlocking hydraulic control valve for anchor miners according to claim 1, characterized in that: The oil outlet A, oil outlet B1, oil outlet B2, oil outlet C and oil drain port T on the valve block are located on the same end surface of the valve block.

3. The multi-state interlocking hydraulic control valve for anchor miners according to claim 1, characterized in that: The pressure reducing valve is a constant pressure reducing valve, and the relief valve is a safety valve. The set pressure is slightly higher than the set pressure of the pressure reducing valve.

4. The multi-state interlocking hydraulic control valve for anchor miners according to claim 1, characterized in that: When the first electromagnetic reversing valve is in the de-energized state, port X2 is connected to port X3, and when it is in the energized state, port X1 is connected to port X2.

5. A method for controlling a multi-state interlocking hydraulic control valve of an anchor miner, using the multi-state interlocking hydraulic control valve of an anchor miner according to any one of claims 1 to 4, characterized in that: The controller selects the working state by controlling the first solenoid one-way valve, the second solenoid one-way valve and the first solenoid reversing valve. When the excavation state is selected, the controller controls the first solenoid one-way valve and the second solenoid one-way valve to be in the de-energized normally closed state, the first solenoid reversing valve to be in the energized state, and the X1 port is connected with the X2 port; when the temporary support state is selected, the controller controls the energized oil outlet port A of the first solenoid one-way valve to be connected, the second solenoid one-way valve to be in the de-energized normally closed state, the first solenoid reversing valve to be in the de-energized state, and the X2 port to be connected with the X3 port; when the drilling rig support state is selected, the controller controls the energized oil outlet port C of the second solenoid one-way valve to be connected, the first solenoid one-way valve to be in the de-energized normally closed state, the first solenoid reversing valve to be in the de-energized state, and the X2 port to be connected with the X3 port.

6. The method for controlling a multi-state interlocking hydraulic control valve of an anchor miner according to claim 5, characterized in that: The bolter excavator can be operated by manual handle and remote control in the excavation state. The two operation modes are locked to each other. When the bolter excavator is adjusted to the temporary support state or the drilling rig support state, the controller shall not transmit the excavation remote control signal.

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