A shield tunneling machine interlocking hydraulic system, a method for operating it, and a mining shield tunneling machine.

Abstract

This disclosure relates to an interlocked hydraulic system for a tunnel boring machine (TBM), a method for operating it, and a mining TBM. The hydraulic system includes an operating valve group for an anchor bolt support system and an operating valve group for a trolley control system. The hydraulic system selectively connects its main control oil circuit to either the anchor bolt support system operating valve group or the trolley control system operating valve group via a directional valve, thereby interlocking the trolley control system with the anchor bolt support system. The main control oil circuit supplies oil from the oil tank to the directional valve via an oil pump. This disclosure achieves interlocking between the trolley control system and the anchor bolt support system, improving the system's safety and reliability.

Description

Technical Field

[0001] This disclosure relates to the technical field of hydraulic systems for mining tunnel boring machines; specifically, this disclosure relates to an interlocking hydraulic system for a tunnel boring machine, a method for operating it, and a mining tunnel boring machine. Background Technology

[0002] Currently, the support work after tunnel excavation by a mining shield machine is a necessary step in tunnel excavation, but it is also a difficult, complex, and highly dangerous task. The main reason is severe "excavation-anchor imbalance" at the working face, where excavation time only accounts for one-third of the entire journey. Solving this problem requires multiple anchor bolting machines to work simultaneously. Anchor bolting support is also a particularly complex process, with varying support times for each anchor bolting machine at different stages of the journey. Therefore, ensuring interlocking between the shield machine trolley and the anchor bolting support system, as well as between each anchor bolting machine, is extremely important.

[0003] In the aforementioned mining tunnel boring machine system, the bolting machine is fixed on the trolley. When the cutterhead is being cut, the trolley remains stationary while the bolting machine begins its support. After cutting is complete, the trolley is not allowed to move until all bolts are properly supported by the bolting system. The trolley can only be moved once all bolts are properly supported.

[0004] Existing technologies cannot achieve safe and reliable interlocking of the tunnel boring machine trolley and the anchor bolt support system, as well as interlocking between each anchor bolt machine. These functions are key to the aforementioned problem of "tunneling-anchoring imbalance". Summary of the Invention

[0005] In view of this, the purpose of this disclosure is to provide an interlocking hydraulic system for a tunnel boring machine, a method for operating it, and a mining tunnel boring machine, thereby solving or at least alleviating one or more of the aforementioned and other problems existing in the prior art.

[0006] To achieve the aforementioned objectives, a first aspect of this disclosure provides an interlocked hydraulic system for a tunnel boring machine (TBM), wherein the hydraulic system includes an operating valve group for an anchor bolt support system and an operating valve group for a trolley control system. Furthermore, the hydraulic system selectively connects its main control oil circuit to either the operating valve group for the anchor bolt support system or the operating valve group for the trolley control system via a directional valve, thereby interlocking the trolley control system with the anchor bolt support system. The main control oil circuit supplies oil from the oil tank to the directional valve via an oil pump.

[0007] In the hydraulic system described above, optionally, the bolt support system operating valve group includes a first bolt support system operating valve group and a second bolt support system operating valve group; the trolley control system operating valve group includes a trolley pulling system operating valve group and a trolley height adjustment system operating valve group; the reversing valve includes a first reversing valve and a second reversing valve; the hydraulic system controls the main control oil circuit to selectively connect with the first bolt support system operating valve group or the trolley pulling system operating valve group through the first reversing valve; and the second reversing valve controls the main control oil circuit to selectively connect with the second bolt support system operating valve group or the trolley height adjustment system operating valve group.

[0008] In the hydraulic system described above, optionally, the hydraulic system has a feedback oil circuit, in which a control valve is provided. The feedback oil circuit is connected to the control valve from the first anchor bolt support system operating valve group, the second anchor bolt support system operating valve group, the trolley system operating valve group, and the trolley height adjustment system operating valve group, respectively. The control valve controls the feedback oil circuit to selectively connect to the oil pump or the oil tank.

[0009] In the hydraulic system described above, optionally, when all the anchor bolting machines in the first anchor bolt support system operating valve group have finished drilling, they will each independently complete the signal feedback to the main control room; when all the anchor bolting machines in the second anchor bolt support system operating valve group have finished drilling, they will each independently complete the signal feedback to the main control room. Only after all signals have been collected can the actions of pulling the trolley and adjusting the trolley height be executed.

[0010] In the hydraulic system described above, optionally, the first directional valve and the second directional valve are three-position four-way directional valves, and the control valve is a two-position four-way manual valve.

[0011] In the hydraulic system described above, optionally, the hydraulic system includes a first button and a second button, the first button being used to control the left position of the first directional valve, the second button being used to control the left position of the second directional valve, and, when the left positions of the first directional valve and the second directional valve are de-energized, the hydraulic system sends a feedback signal to the main control room.

[0012] In the hydraulic system described above, optionally, the main control oil circuit is connected to a first hydraulically controlled check valve group and a second hydraulically controlled check valve group. The first directional valve controls the first anchor bolt support system operating valve group and the trolley system operating valve group respectively through the first hydraulically controlled check valve group. The second directional valve controls the second anchor bolt support system operating valve group and the trolley height adjustment system operating valve group respectively through the second hydraulically controlled check valve group.

[0013] In the hydraulic system described above, the first hydraulically controlled check valve group includes a hydraulically controlled check valve for controlling the first anchor bolt support system operating valve group and a hydraulically controlled check valve for controlling the trolley system operating valve group; the second hydraulically controlled check valve group includes a hydraulically controlled check valve for controlling the second anchor bolt support system operating valve group and a hydraulically controlled check valve for controlling the trolley height adjustment system operating valve group.

[0014] To achieve the aforementioned objective, a second aspect of this disclosure provides a method for operating a hydraulic system as described in the first aspect, wherein, when there is no feedback oil in the first anchor bolt support system operating valve group, the second anchor bolt support system operating valve group, the trolley system operating valve group, and the trolley height adjustment system operating valve group, the oil pump supplies oil to the first reversing valve and the second reversing valve at standby pressure, and, in the method:

[0015] When the bolting machine of the first bolting support system operating valve group needs to work, the first directional valve is energized in the left position. The pilot oil passes through the left position of the first directional valve to control the first hydraulic control check valve group to open in the reverse direction in the left position. The hydraulic oil in the main control oil circuit flows through the first hydraulic control check valve group to the first bolting support system operating valve group. When the first bolting support system operating valve group is activated, the bolting machine of the first bolting support system operating valve group has a corresponding action output.

[0016] When the bolting machine of the second bolting support system operating valve group needs to work, the second directional valve is energized in the left position. The pilot oil passes through the left position of the second directional valve to control the second hydraulic control check valve group to open in the reverse direction in the left position. The hydraulic oil in the main control oil circuit flows to the second bolting support system operating valve group through the second hydraulic control check valve group. When the second bolting support system operating valve group is activated, the bolting machine of the second bolting support system operating valve group has a corresponding action output.

[0017] When the trolley system operating valve group needs to work, the first directional valve is energized in the right position, the pilot oil opens in the reverse direction in the right position of the first hydraulic control check valve group of the first directional valve, and the main oil circuit hydraulic oil flows to the trolley system operating valve group through the first hydraulic control check valve group. When the trolley system operating valve group is activated, the trolley system has a corresponding action output.

[0018] When the trolley height adjustment system operating valve group needs to work, the second directional valve is energized in the right position, the pilot oil opens in the reverse direction in the right position of the second hydraulic control check valve group of the second directional valve, and the main oil circuit hydraulic oil flows to the trolley height adjustment system operating valve group through the second hydraulic control check valve group. When the trolley height adjustment system operating valve group is activated, the trolley height adjustment system has a corresponding action output.

[0019] In an emergency: when the control valve is not pressed, operating the first anchor bolt support system operating valve group, the second anchor bolt support system operating valve group, or the trolley system operating valve group, or the trolley height adjustment system operating valve group, provides feedback oil through the control valve to the oil pump. Consequently, the oil pump pressure changes with the feedback pressure. In an emergency, pressing the control valve momentarily cuts off the feedback oil flow to the first anchor bolt support system operating valve group, the second anchor bolt support system operating valve group, or the trolley system operating valve group, or the trolley height adjustment system operating valve group, thus providing protection.

[0020] When the first button is pulled up, the left position of the first directional valve is energized, connecting the anchor bolt machine oil circuit of the first anchor bolt support system operating valve group, and the anchor bolt machine of the first anchor bolt support system operating valve group begins operation. When the first anchor bolt support system operating valve group has finished bolting, the operator presses the first button, de-energizing the left position of the first directional valve, disconnecting the anchor bolt machine oil circuit of the first anchor bolt support system operating valve group, and simultaneously sending a feedback signal to the main control room, informing the main operator that the anchor bolting position of the first anchor bolt support system operating valve group has completed anchor bolt support. When the second button is pulled up, the left position of the second directional valve is energized, and the second... When the anchor bolting machine oil circuit of the second anchor bolting system operating valve group is connected, the anchor bolting machine of the second anchor bolting system operating valve group starts working. When the second anchor bolting system operating valve group finishes driving the anchor bolt, the operator presses the second button, the left position of the second directional valve is de-energized, the anchor bolting machine oil circuit of the second anchor bolting system operating valve group is disconnected, and at the same time a feedback signal is sent back to the main control room. The main operator knows that the anchor bolting position of the second anchor bolting system operating valve group has completed anchor bolting. When the feedback signals from the first anchor bolting system operating valve group and the second anchor bolting system operating valve group are fully received, the hydraulic system begins to prepare for the next action.

[0021] To achieve the aforementioned objectives, a third aspect of this disclosure provides a mining tunnel boring machine having a tunnel boring machine interlocking hydraulic system as described in any one of the first aspects above.

[0022] This disclosure proposes an interlocked hydraulic system for a tunnel boring machine (TBM), a method for operating it, and a mining TBM. The system uses a reversing valve to control the reverse opening of a hydraulically controlled check valve group, and utilizes the interlocking function between its left and right positions to achieve interlocking between the trolley control system and the anchor bolt support system, thereby improving the system's safety and increasing its reliability. Attached Figure Description

[0023] The disclosure of this invention will become more apparent with reference to the accompanying drawings. It should be understood that these drawings are for illustrative purposes only and are not intended to limit the scope of this disclosure. In the drawings:

[0024] Figure 1 This is a schematic diagram of the structure of one embodiment of a shield tunneling machine interlocking hydraulic system disclosed herein; and

[0025] Figure 2 This is a schematic diagram of the button structure in one embodiment of the shield machine interlocking hydraulic system disclosed herein.

[0026] Reference numerals: 1-Motor; 2-Oil pump; 3-First directional valve; 4-First hydraulic check valve assembly; 5-Second directional valve; 6-Second hydraulic check valve assembly; 7-Control valve; 8-First anchor bolt support system operating valve assembly; 9-Trolley pulling system operating valve assembly; 10-Second anchor bolt support system operating valve assembly; 11-Trolley height adjustment system operating valve assembly; 12-First button; 13-Second button. Detailed Implementation

[0027] Referring to the accompanying drawings and specific embodiments, the interlocking hydraulic system for a tunnel boring machine according to this disclosure, the method of operating it, and the structure, composition, features, and advantages of the mining tunnel boring machine will be described by way of example below; however, all descriptions should not be construed as limiting this disclosure in any way.

[0028] Furthermore, for any single technical feature described or implied in the embodiments mentioned herein, or any single technical feature shown or implied in the various drawings, this disclosure still allows for any combination or deletion of these technical features (or their equivalents) without any technical obstacle, and thus these further embodiments according to this disclosure should also be considered within the scope of this description.

[0029] It should also be noted that terms such as "setup" should be interpreted broadly. For example, it can refer to a fixed connection, a detachable connection, or an integral part; it can refer to a direct connection or an indirect connection through an intermediate medium. Unless otherwise explicitly defined, those skilled in the art can understand the specific meaning of the above terms in this disclosure based on the specific circumstances.

[0030] Furthermore, the terms "first," "second," etc., can refer to different or the same objects. They are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. "A plurality of," etc., means at least two or more, unless otherwise explicitly specified.

[0031] Figure 1 This is a schematic diagram of one embodiment of a shield tunneling machine interlocking hydraulic system disclosed herein.

[0032] like Figure 1As shown, the shield machine interlocking hydraulic system may include a motor 1, an oil pump 2, a first directional valve 3, a first hydraulically controlled check valve group 4, a second directional valve 5, a second hydraulically controlled check valve group 6, a control valve 7, a first anchor bolt support system operating valve group 8, a trolley pulling system operating valve group 9, a second anchor bolt support system operating valve group 10, and a trolley height adjustment system operating valve group 11.

[0033] The directional control valves 3 and 5 can be directional control valves with two or more flow patterns and two or more ports, and are also valves capable of realizing the flow, cut-off, and reversal of hydraulic oil and realizing sequential action control. As can be seen from the figure, in this embodiment, the first directional control valve 3 and the second directional control valve 5 are three-position four-way directional control valves, and the control valve 7 is a two-position four-way manual valve.

[0034] In such Figure 1 In the illustrated embodiment, the hydraulic system controls the main control oil circuit of the hydraulic system through directional valves, namely the first directional valve 3 and the second directional valve 5. At the same time, it can selectively connect with the operating valve group of the anchor bolt support system or the operating valve group of the trolley control system, thereby interlocking the trolley control system with the anchor bolt support system.

[0035] In this example, the bolt support system operating valve group includes a first bolt support system operating valve group 8 and a second bolt support system operating valve group 10, and the trolley control system operating valve group includes a trolley pulling system operating valve group 9 and a trolley height adjustment system operating valve group 11. Each bolt support system may include multiple bolting machines.

[0036] Specifically, the hydraulic system controls the main control oil circuit to selectively connect to the first anchor bolt support system operating valve group 8 or the trolley system operating valve group 9 through the first hydraulic control check valve group 4 via the first reversing valve 3, and the second reversing valve 5 controls the main control oil circuit to selectively connect to the second anchor bolt support system operating valve group 10 or the trolley height adjustment system operating valve group 11 through the second hydraulic control check valve group 6.

[0037] The trolley control system and the anchor bolt support system are interlocked via the left and right positions of hydraulic check valve groups 4 and 6. During actual operation, when all anchor bolting machines in the first anchor bolt support system's operating valve group 8 have completed their bolting, they each send a separate signal to the main control room. Similarly, when all anchor bolting machines in the second anchor bolt support system's operating valve group 10 have completed their bolting, they each send a separate signal to the main control room. Only after all signals are collected can the trolley be pulled and its height adjusted. This ensures that in a multi-anchor bolt support system, the trolley control system will not supply oil if even one anchor bolting machine has not yet completed its support. Specifically, the left and right position interlock of the hydraulic check valve groups 4 and 6 means that when the left position is energized, the right position cannot be energized; that is, when the anchor bolt support system is energized, the trolley control system cannot be energized.

[0038] In an optional embodiment, the main control room may be located on a trolley or on the ground.

[0039] from Figure 1 It can be seen that the main control oil route is driven by motor 1 to pump 2 to supply oil from the oil tank to the first reversing valve 3 and the second reversing valve 5.

[0040] Specifically, the main control oil circuit is connected to a first hydraulically controlled check valve group 4 and a second hydraulically controlled check valve group 6. The first directional valve 3 controls the first anchor bolt support system operating valve group 8 and the trolley pulling system operating valve group 9 respectively through the first hydraulically controlled check valve group 4. The second directional valve 5 controls the second anchor bolt support system operating valve group 10 and the trolley lifting system operating valve group 11 respectively through the second hydraulically controlled check valve group 6. The first hydraulically controlled check valve group 4 includes a hydraulically controlled check valve for controlling the first anchor bolt support system operating valve group 8 and a hydraulically controlled check valve for controlling the trolley pulling system operating valve group 9. The second hydraulically controlled check valve group 6 includes a hydraulically controlled check valve for controlling the second anchor bolt support system operating valve group 10 and a hydraulically controlled check valve for controlling the trolley lifting system operating valve group 11.

[0041] It should be noted that the main control oil circuit is represented by a solid line in the figure. The hydraulic system also has a feedback oil circuit, in which a control valve 7 is installed. In this embodiment, the control valve 7 is a two-position four-way manual valve. The feedback oil circuit connects to the control valve 7 from the first anchor bolt support system operating valve group 8, the second anchor bolt support system operating valve group 10, the trolley system operating valve group 9, and the trolley height adjustment system operating valve group 11. The control valve 7 controls the feedback oil circuit to selectively connect to the oil pump 2 or the oil tank located at the bottom. In the hydraulic system of this disclosure, the control valve 7 controls and adjusts the flow direction, pressure, and flow rate of the oil in the hydraulic system, so that the oil pump 2 and its drive motor 1 obtain the required motion direction, hydraulic pressure, and motion speed of the hydraulic oil.

[0042] It should be noted that the feedback oil circuit is represented by a dashed line in the diagram. In this disclosure, multiple anchor bolting machines can each control their oil circuits independently, achieving individual oil supply and cutoff; therefore, there are no issues of mutual constraint or interference.

[0043] In this embodiment, when there is no feedback oil in the first anchor bolt support system operating valve group 8, the second anchor bolt support system operating valve group 10, the trolley system operating valve group 9, and the trolley height adjustment system operating valve group 11, the oil pump 2 only supplies oil to the first reversing valve 3 and the second reversing valve 5 at standby pressure. When multiple anchor bolt machines of the first anchor bolt support system operating valve group 8 need to perform support work, the first reversing valve 3 is energized in the left position, and the pilot oil passes through the left position of the first reversing valve 3 to control the first hydraulic control check valve group 4 to open in the reverse direction in the left position. The hydraulic oil in the main control oil circuit flows to the first anchor bolt support system operating valve group 8 through the first hydraulic control check valve group 4. When the first anchor bolt support system operating valve group 8 is activated, the anchor bolt machine of the first anchor bolt support system operating valve group 8 has a corresponding action output.

[0044] Similarly, when the bolting machine of the second bolt support system operating valve group 10 needs to work, the second directional valve 5 is energized in the left position. The pilot oil passes through the second directional valve 5 in the left position to control the second hydraulic control check valve group 6 to open in the reverse direction in the left position. The hydraulic oil in the main control oil circuit flows to the second bolt support system operating valve group 10 through the second hydraulic control check valve group 6. When the second bolt support system operating valve group 10 is activated, the bolting machine of the second bolt support system operating valve group 10 has a corresponding action output.

[0045] Because the left and right positions of the first reversing valve 3 and the second reversing valve 5 are interlocked, the left position can be energized while the right position cannot. That is, when the anchor bolt support system is energized, the trolley height adjustment system and the trolley pulling system cannot be energized.

[0046] When there is no feedback oil in the first anchor bolt support system operating valve group 8, the second anchor bolt support system operating valve group 10, the trolley system operating valve group 9, and the trolley height adjustment system operating valve group 11, the oil pump 2 only supplies oil to the first reversing valve 3 and the second reversing valve 5 at standby pressure. When the support work is completed, and the trolley system operating valve group 9 needs to work, the first reversing valve 3 is energized in the right position. The pilot oil opens in the reverse direction in the right position through the first hydraulically controlled check valve group 4 of the first reversing valve 3. The main oil circuit hydraulic oil flows to the trolley system operating valve group 9 through the first hydraulically controlled check valve group 4. When the trolley system operating valve group 9 is activated, the trolley system has a corresponding action output.

[0047] Similarly, when the trolley height adjustment system operating valve group 11 needs to work, the second directional valve 5 is energized in the right position, the pilot oil is reversed in the right position through the second hydraulic control check valve group 6 of the second directional valve 5, and the main oil circuit hydraulic oil flows to the trolley height adjustment system operating valve group 11 through the second hydraulic control check valve group 6. When the trolley height adjustment system operating valve group 11 is activated, the trolley height adjustment system has a corresponding action output.

[0048] Because the left and right positions of the first reversing valve 3 and the second reversing valve 5 are interlocked, the right position is energized, but the left position cannot be energized. That is, when the trolley height adjustment system and the trolley pulling system are working, the anchor bolt support system cannot be energized.

[0049] If the control valve 7 is not pressed, such as Figure 1 As shown, when operating the first anchor bolt support system operating valve group 8, the second anchor bolt support system operating valve group 10, or the trolley system operating valve group 9 and the trolley height adjustment system operating valve group 11, the feedback oil is fed back to the oil pump 2 through the control valve 7, so the pressure of the oil pump 2 will change with the change of the feedback pressure.

[0050] In the event of an emergency, by pressing the control valve 7 instantly, the feedback oil of the first anchor bolt support system operating valve group 8, the second anchor bolt support system operating valve group 10, or the trolley system operating valve group 9 and the trolley height adjustment system operating valve group 11 is cut off. In this way, without feedback, the oil pump 2 can only output standby pressure, and there is no high-pressure oil, which plays a protective role.

[0051] As can be seen from the above, in this shield machine interlocking system, the first anchor bolt support system operating valve group 8, the hoisting vehicle system operating valve group 9, the second anchor bolt support system operating valve group 10, and the trolley height adjustment system operating valve group 11 are all supplied with oil by the same oil pump 2. The first anchor bolt support system operating valve group 8 and the hoisting vehicle system operating valve group 9 can operate independently, as can the second anchor bolt support system operating valve group 10 and the trolley height adjustment system operating valve group 11. If either the first anchor bolt support system operating valve group 8 or the second anchor bolt support system operating valve group 10 is running, then the hoisting vehicle system operating valve group 9 and the trolley height adjustment system operating valve group 11 cannot operate. Furthermore, there is an independent control switch between the first anchor bolt support system operating valve group 8 and the second anchor bolt support system operating valve group 10; once either one has completed its support work, the high-pressure oil circuit can be cut off independently.

[0052] Figure 2 This is a schematic diagram of the button structure in one embodiment of the shield machine interlocking hydraulic system disclosed herein.

[0053] According to this embodiment, the hydraulic system may include a first button 12 and a second button 13. The first button 12 is used to control the left position of the first directional valve 3, and the second button 13 is used to control the left position of the second directional valve 5. When the left positions of the first directional valve 3 and the second directional valve 5 are de-energized, the hydraulic system sends a feedback signal to the main control room.

[0054] This disclosure adopts two such as Figure 2 The buttons 12 and 13 shown control the left position of directional valves 3 and 5. These buttons have two functions: pressing them disconnects them (meaning they are not reset) and pulling them off connects them.

[0055] Specifically, when the first button 12 is pulled up, the left position of the first reversing valve 3 is energized, the oil circuit of the anchor bolting machine of the first anchor bolting system operating valve group 8 is connected, and the anchor bolting machine of the first anchor bolting system operating valve group 8 begins operation. When the first anchor bolting system operating valve group 8 has finished bolting, the operator presses the first button 12, the left position of the first reversing valve 3 is de-energized, the oil circuit of the anchor bolting machine of the first anchor bolting system operating valve group 8 is disconnected, and at the same time, a feedback signal is sent back to the main control room, informing the main operator that the anchor bolting position of the first anchor bolting system operating valve group 8 has completed anchor bolting.

[0056] When the second button 13 is pulled up, the left position of the second reversing valve 5 is energized, the oil circuit of the anchor bolt machine in the second anchor bolt support system operating valve group 10 is connected, and the anchor bolt machine of the second anchor bolt support system operating valve group 10 starts working. When the second anchor bolt support system operating valve group 10 finishes anchoring, the operator presses the second button 13, the left position of the second reversing valve 5 is de-energized, the oil circuit of the anchor bolt machine in the second anchor bolt support system operating valve group 10 is disconnected, and at the same time a feedback signal is sent back to the main control room, and the main operator knows that the anchor bolt position of the second anchor bolt support system operating valve group 10 has completed anchor bolt support.

[0057] When the hydraulic system receives feedback signals from both the first anchor bolt support system operating valve group 8 and the second anchor bolt support system operating valve group 10, it begins preparing for the next action. This ensures that the trolley can only be operated after all anchor bolt support is completed, increasing system safety.

[0058] In this disclosure, in order to save energy and reduce heat generation, the entire hydraulic system adopts a load-sensitive system, and the oil pump 2 also adopts a load-sensitive pump.

[0059] The shield machine's interlocking hydraulic system uses three-position four-way directional valves 3 and 5 to control the reverse opening of hydraulic control check valve groups 4 and 6. It can use a small flow pilot hydraulic flow to control the large flow of the main circuit, thereby directly controlling the on / off of the main control oil circuit, which has strong safety.

[0060] Meanwhile, the left and right positions of the three-position four-way directional valves 3 and 5 have an interlocking function, meaning only one end can be energized. This allows for the control of two sequential actions, interlocking the two actions and increasing the reliability and safety of the hydraulic system.

[0061] The interlocked hydraulic system of the tunnel boring machine adds a hydraulic emergency safety circuit to the feedback loop of the load-sensitive valve and the load-sensitive pump. The two-position four-way control valve 7 can connect and disconnect the feedback loop, so that the entire hydraulic system has no high-pressure oil output and can only work at standby pressure, which has a high degree of safety.

[0062] The two-position two-way electric control switches 12 and 13 are used, which can control the oil circuit on / off valve and also feed back the operation completion signal to the main control room, thereby improving the safety and reliability of the hydraulic interlock system during use.

[0063] To save energy and reduce heat generation, this disclosure employs a load-sensitive system. The anchor bolt support system, trolley pulling system, and trolley height adjustment system are all supplied with oil by the same oil pump. High-pressure oil is only supplied to the trolley pulling system and height adjustment system when the anchor bolt system is not in operation, thus preventing interlock failure of the various systems and avoiding potential dangers. Independent control switches are installed between the two anchor bolt machines, eliminating interference between them and enabling the high-pressure oil circuit to be cut off in case of emergencies. After the anchor bolt machine completes its work, the operator receives a feedback signal, allowing them to determine whether the support is complete, thereby improving the safety and reliability of the system.

[0064] The scope of this disclosure is not limited to the contents of the above specification. Those skilled in the art can make various modifications and variations to the above embodiments without departing from the technical concept of this disclosure, and all such modifications and variations should fall within the scope of this disclosure.

Claims

1. A shield tunneling machine interlocking hydraulic system, characterized in that, The hydraulic system includes an anchor bolt support system operating valve group and a trolley control system operating valve group. The hydraulic system controls the main control oil circuit of the hydraulic system to selectively connect with the anchor bolt support system operating valve group or the trolley control system operating valve group through the reversing valve (3, 5), thereby interlocking the trolley control system with the anchor bolt support system. The main control oil circuit supplies oil from the oil tank to the reversing valve (3, 5) via the oil pump (2). The bolt support system operating valve group includes a first bolt support system operating valve group (8) and a second bolt support system operating valve group (10). The trolley control system operating valve group includes a trolley pulling system operating valve group (9) and a trolley height adjustment system operating valve group (11). The reversing valve includes a first reversing valve (3) and a second reversing valve (5). The hydraulic system controls the main control oil circuit to selectively connect with the first bolt support system operating valve group (8) or the trolley pulling system operating valve group (9) through the first reversing valve (3). The second reversing valve (5) controls the main control oil circuit to selectively connect with the second bolt support system operating valve group (10) or the trolley height adjustment system operating valve group (11).

2. The hydraulic system as described in claim 1, characterized in that, The hydraulic system has a feedback oil circuit, in which a control valve (7) is provided. The feedback oil circuit is connected to the control valve (7) from the first anchor bolt support system operating valve group (8), the second anchor bolt support system operating valve group (10), the trolley system operating valve group (9), and the trolley height adjustment system operating valve group (11). The control valve (7) controls the feedback oil circuit to selectively connect to the oil pump (2) or the oil tank.

3. The hydraulic system as described in claim 2, characterized in that, When all the anchor bolts of the first anchor bolt support system operating valve group (8) are finished, they will each send a separate signal to the main control room. When all the anchor bolts of the second anchor bolt support system operating valve group (10) are finished, they will each send a separate signal to the main control room. Only after all the signals are collected can the actions of pulling the trolley and adjusting the trolley height be performed.

4. The hydraulic system as described in claim 2, characterized in that, The first reversing valve (3) and the second reversing valve (5) are three-position four-way reversing valves, and the control valve (7) is a two-position four-way manual valve.

5. The hydraulic system as described in claim 4, characterized in that, The hydraulic system includes a first button (12) and a second button (13). The first button (12) is used to control the left position of the first directional valve (3), and the second button (13) is used to control the left position of the second directional valve (5). When the left positions of the first directional valve (3) and the second directional valve (5) are de-energized, the hydraulic system sends a feedback signal to the main control room.

6. The hydraulic system as described in claim 5, characterized in that, The main control oil circuit is connected to a first hydraulic control check valve group (4) and a second hydraulic control check valve group (6). The first reversing valve (3) controls the first anchor bolt support system operating valve group (8) and the trolley system operating valve group (9) respectively through the first hydraulic control check valve group (4). The second reversing valve (5) controls the second anchor bolt support system operating valve group (10) and the trolley height adjustment system operating valve group (11) respectively through the second hydraulic control check valve group (6).

7. The hydraulic system as described in claim 6, characterized in that, The first hydraulic check valve group (4) includes a hydraulic check valve for controlling the first anchor bolt support system operating valve group (8) and a hydraulic check valve for controlling the trolley system operating valve group (9); the second hydraulic check valve group (6) includes a hydraulic check valve for controlling the second anchor bolt support system operating valve group (10) and a hydraulic check valve for controlling the trolley height adjustment system operating valve group (11).

8. A method of operating the hydraulic system as described in claim 6, characterized in that, When there is no feedback oil in the first anchor bolt support system operating valve group (8), the second anchor bolt support system operating valve group (10), the trolley system operating valve group (9), and the trolley height adjustment system operating valve group (11), the oil pump (2) supplies oil to the first reversing valve (3) and the second reversing valve (5) at standby pressure, and in the method: When the bolting machine of the first bolting support system operating valve group (8) needs to work, the first reversing valve (3) is energized in the left position, and the pilot oil passes through the first reversing valve (3) in the left position to control the first hydraulic control check valve group (4) to open in the reverse direction in the left position. The hydraulic oil of the main control oil circuit flows through the first hydraulic control check valve group (4) to the first bolting support system operating valve group (8). When the first bolting support system operating valve group (8) is activated, the bolting machine of the first bolting support system operating valve group (8) has a corresponding action output. When the anchor bolt machine of the second anchor bolt support system operating valve group (10) needs to work, the second reversing valve (5) is energized in the left position. The pilot oil passes through the second reversing valve (5) in the left position to control the second hydraulic control check valve group (6) to open in the reverse direction in the left position. The hydraulic oil of the main control oil circuit flows to the second anchor bolt support system operating valve group (10) through the second hydraulic control check valve group (6). When the second anchor bolt support system operating valve group (10) is activated, the anchor bolt machine of the second anchor bolt support system operating valve group (10) has a corresponding action output. When the trolley system operating valve group (9) needs to work, the first reversing valve (3) is energized in the right position, and the pilot oil is opened in the reverse direction in the right position through the first hydraulic control check valve group (4) of the first reversing valve (3). The main oil circuit hydraulic oil flows to the trolley system operating valve group (9) through the first hydraulic control check valve group (4). When the trolley system operating valve group (9) is activated, the trolley system has a corresponding action output. When the trolley height adjustment system operating valve group (11) needs to work, the second reversing valve (5) is energized in the right position, the pilot oil passes through the second hydraulic control check valve group (6) of the second reversing valve (5) and opens in the right position, and the main oil circuit hydraulic oil flows through the second hydraulic control check valve group (6) to the trolley height adjustment system operating valve group (11). When the trolley height adjustment system operating valve group (11) is activated, the trolley height adjustment system has a corresponding action output. In case of an emergency: When the control valve (7) is not pressed, when the first anchor bolt support system operating valve group (8), the second anchor bolt support system operating valve group (10), or the trolley system operating valve group (9) and the trolley height adjustment system operating valve group (11) are operated, the feedback oil is fed back to the oil pump (2) through the control valve (7), so the pressure of the oil pump (2) will change with the change of the feedback pressure. In case of an emergency, by pressing the control valve (7) momentarily, the feedback oil of the first anchor bolt support system operating valve group (8), the second anchor bolt support system operating valve group (10), or the trolley system operating valve group (9) and the trolley height adjustment system operating valve group (11) is cut off, which plays a protective role. as well as When the first button (12) is pulled up, the left position of the first reversing valve (3) is energized, the oil circuit of the anchor bolt machine of the first anchor bolt support system operating valve group (8) is connected, and the anchor bolt machine of the first anchor bolt support system operating valve group (8) works. When the first anchor bolt support system operating valve group (8) finishes anchoring, the operator presses the first button (12), the left position of the first reversing valve (3) is de-energized, the oil circuit of the anchor bolt machine of the first anchor bolt support system operating valve group (8) is disconnected, and at the same time a feedback signal is fed back to the main control room. The main operator knows that the anchor bolt position of the first anchor bolt support system operating valve group (8) has completed anchor bolt support. When the second button (13) is pulled up, the left position of the second reversing valve (5) is energized, and the first... When the oil circuit of the anchor bolt machine of the second anchor bolt support system operating valve group (10) is connected, the anchor bolt machine of the second anchor bolt support system operating valve group (10) works. When the second anchor bolt support system operating valve group (10) finishes anchoring, the operator presses the second button (13), the left position of the second reversing valve (5) is de-energized, the oil circuit of the anchor bolt machine of the second anchor bolt support system operating valve group (10) is disconnected, and at the same time a feedback signal is fed back to the main control room. The main operator knows that the anchor bolt position of the second anchor bolt support system operating valve group (10) has completed anchor bolt support. When the feedback signals of the first anchor bolt support system operating valve group (8) and the second anchor bolt support system operating valve group (10) are fully received, the hydraulic system begins to prepare for the next action.

9. A mining tunnel boring machine, characterized in that, The mining tunnel boring machine has a tunnel boring machine interlocking hydraulic system as described in any one of claims 1 to 7.

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