Safe operation device for high-pressure jet system carried by shield tunneling machine

Abstract

The invention relates to the field of shield tunneling machines, and discloses a safe operation device for a high-pressure jet system carried by a shield tunneling machine, which comprises a high-pressure water pump, a central rotary joint, a ball valve, an electromagnetic valve and a pressure relief pipe, the pressure relief pipe is communicated with a connecting pipeline of the high-pressure water pump and the central rotary joint, and the central rotary joint is communicated with a rotary center of the shield tunneling machine. The rotation center is communicated with a nozzle fixed in the cutter head cutter, the other end of the nozzle is communicated with the outside, the electromagnetic valve and the ball valve are connected to the pressure relief pipeline in parallel, and the electromagnetic valve is a normally-open electromagnetic valve. According to the scheme, a set of safety device is connected into the pipeline between the high-pressure water pump and the central rotary joint, the safety device plays a role in safety protection when a button of the high-pressure water pump is operated by mistake in a master control room, high-pressure water flows out from a ball valve and an electromagnetic valve pipeline, and the pressure of the high-pressure water from a cutter nozzle is instantly reduced; and the effects of dredging and reducing pressure are achieved, and the personal safety of operators in the soil bin is guaranteed.

Description

Technical Field

[0001] The invention relates to the field of shield machines, and in particular to a safe operation device for a shield machine equipped with a high-pressure jet system. Background Art

[0002] The application of water jet technology in shield machines is undergoing preliminary exploration. For dangerous situations with high-pressure jets, the requirements for the safe use of water jets on shield machines are higher. The automation level of water jet systems and auxiliary cutterhead tool rock breaking technology have been developed, and the application prospects will become wider and wider. The requirements for its safe operation and maintenance safety work are also higher.

[0003] When the shield machine is undergoing maintenance inspection and tool replacement operations, if the high-pressure pump is started by mistake, the water jet pressure will reach 280MPa, causing serious harm to the operators in the soil bin. Currently, there are no effective safety measures to address this danger. Summary of the invention

[0004] The present invention is intended to provide a safe operation device for a high-pressure jet system of a shield machine, so as to solve the problem that the high-pressure water pump of the high-pressure jet system of the shield machine may be seriously injured when it is misoperated.

[0005] To achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a safe operation device of a high-pressure jet system equipped with a shield machine, comprising: a high-pressure water pump, a central swivel joint, a ball valve, a solenoid valve and a pressure relief pipe, the pressure relief pipe is connected to the connecting pipeline between the high-pressure water pump and the central swivel joint, the solenoid valve and the ball valve are connected in parallel to the pressure relief pipeline, the central swivel joint is connected to the rotation center of the shield machine, the rotation center is connected to a nozzle fixed inside the cutter head, the other end of the nozzle is connected to the outside world, and the solenoid valve is a normally open solenoid valve.

[0006] The principle of this solution is as follows: when the operator enters the cutter disc to perform maintenance work or check and replace the cutting tool, the high-pressure water jet system is stopped, that is, the high-pressure water pump is turned off, and the ball valve is opened at the same time to connect the high-pressure water pump with the pressure relief pipe. When the high-pressure water pump is opened by mistake, the high-pressure water will enter the pressure relief pipe through the solenoid valve and the ball valve, reducing the water pressure at the nozzle to ensure the safety of the operator in the cutter disc; at the same time, when the solenoid valve is energized and closed by mistake, the high-pressure water will pass through the ball valve to the pressure relief pipe to avoid the situation where the pressure cannot be unloaded, thereby ensuring the safety of the operator in the cutter disc; when the high-pressure water jet system is operating normally, the ball valve is closed, and the solenoid valve is energized to close the pipeline. Once the ball valve pipeline is not closed or the solenoid valve pipeline is not closed, high-pressure water will flow out of the pressure relief pipe, which can remind personnel to handle it and ensure the normal operation of the high-pressure water jet.

[0007] Advantages of this solution: When the cutter disc is undergoing maintenance or inspection and replacement of the cutter, the safety operation device can unload the pressure of the high-pressure water regardless of the misoperation of the high-pressure water pump or the electromagnetic valve of the safety operation device in the main control room, and play a protective blocking mechanism against personal injury to the operator caused by the high-pressure water jet; when the high-pressure water jet system is operating normally, even if the main control room misoperates and the corresponding pipelines of the ball valve and the electromagnetic valve are not closed, the high-pressure water flowing out through the pressure relief pipe can also promptly remind the personnel to handle it, ensuring the normal operation of the high-pressure water jet; and the safety operation device has low manufacturing and operating costs, and plays a great protective role. It ensures the safe operation of the shield machine equipped with high-pressure water jets.

[0008] Preferably, the ball valve and the solenoid valve are connected to the pressure relief pipe through a tee. Connecting through a tee reduces the number of connection points and valves, reduces the risk of system leakage, and improves the reliability and stability of the system.

[0009] Preferably, a safety switch is connected in series to the control circuit of the solenoid valve, and the ball valve and the safety switch are arranged in linkage, the safety switch is disconnected when the ball valve is opened, and the safety switch is closed when the ball valve is closed. An additional solenoid switch is provided, and its opening and closing state is controlled by the ball valve, so that the solenoid valve can be prevented from being accidentally energized and closed when the safety device is opened for maintenance.

[0010] Preferably, a water shield is provided on the outside of the tee, a water receiving tray is provided below the water shield, a water leakage detection alarm circuit is provided in the water receiving tray, and the water leakage detection alarm circuit includes a water immersion switch, a normally closed relay, a power supply and an alarm connected in series, and the output control end of the normally closed relay is connected in series to the control circuit of the solenoid valve. When a leak occurs at the tee, water will flow into the water receiving tray under the action of the water shield, and the two electrodes of the water immersion switch will conduct the entire circuit after encountering the leaked water in the water receiving tray, so that the alarm is powered on and sounds an alarm, and at the same time, the normally closed relay is in an open state, so that the control circuit of the solenoid valve cannot be conducted, and the solenoid valve is in an open state, so as to achieve drainage and pressure relief, and avoid further damage to the connecting pipeline of the high-pressure water pump and the central swivel joint.

[0011] Preferably, the high-pressure water pump is connected to the central swivel joint through a single water pump high-pressure hose, the swivel center is connected to a high-pressure distributor through a second high-pressure pipe joint, the high-pressure distributor is connected to the L-beam high-pressure hose in the L-beam of the shield machine cutter head, the L-beam high-pressure hose is connected to the high-pressure hard pipe laid on the back of the cutter head, and the high-pressure hard pipe is connected to the nozzle.

[0012] Preferably, one end of the water pump high pressure hose is connected to the high pressure water pump, and the other end of the water pump high pressure hose passes through multiple trailers of the shield machine and is connected to the central swivel joint. Multiple trailers use one high pressure hose, which reduces joints and connection structures and reduces the risk of pipeline leakage.

[0013] Preferably, the central swivel joint is connected to the swivel center through a first high-pressure pipe joint.

[0014] Preferably, the central swivel joint is provided with a first flow channel and a second flow channel in communication, the first flow channel and the second flow channel are perpendicular to each other, the axis of the second flow channel is perpendicular to the axis of the swivel center, one end of the first high-pressure pipe joint is in communication with the second flow channel, the other end of the first high-pressure pipe joint is in communication with a water pump high-pressure hose, and the connecting end of the first high-pressure pipe joint and the second flow channel is located in the second flow channel. By connecting the second flow channel with the first high-pressure pipe joint, it is possible to prevent water from leaking under high pressure or the connection joint from being detached; at the same time, by means of the structural arrangement of the first flow channel, the second flow channel and the first high-pressure pipe joint, if there is leakage, the joint liquid pressure will drop rapidly, preventing the liquid from leaking out at an ultra-high pressure and causing serious damage to personnel and materials, thereby improving the safety of the high-pressure jet system.

[0015] Preferably, the high-pressure water pump is used to deliver high-pressure water with colorant added in the shield machine water tank to the pump water high-pressure hose. Since the pressure of the jet water flow is relatively high, the smaller leakage pressure has less impact, and it is not easy to observe and find from the data on the pressure gauge alone. By adding colorant to the water, the leakage can be easily observed through the colorant, which is convenient for operators to find and deal with in time, avoiding the occurrence of more serious accidents.

[0016] Preferably, a steel plate is provided on the outer surface of the L-beam high-pressure hose. The high-pressure pipeline in the cutter disc is located in the soil bin, where the environment is complex. Isolated rocks, hard rocks, corrosive liquids, etc. can damage the pipeline. A steel plate is used on the back of the pipeline to protect the L-beam high-pressure hose in the cutter disc and reduce the risk of pipeline leakage.

[0017] Preferably, the steel plate is provided with an observation door, which is fixedly connected to the steel plate by bolts. The observation door is provided to facilitate viewing of the connection status of the L-beam high-pressure hose and its connection structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic structural diagram of an embodiment of the present invention.

[0019] Figure 2 Schematic diagram of a water leakage detection alarm circuit and a solenoid valve according to an embodiment of the present invention.

[0020] Figure 3 This is a schematic diagram of the structure of a shield machine equipped with a high-pressure jet system according to an embodiment of the present invention.

[0021] Figure 4 It is a schematic diagram of the structure of the rotation center of an embodiment of the present invention.

[0022] Figure 5 For the embodiment of the present invention Figure 2 Schematic diagram of the local structure.

[0023] Figure 6 It is a schematic structural diagram of the central swivel joint in an embodiment of the present invention. DETAILED DESCRIPTION

[0024] The following is further described in detail through specific implementation methods:

[0025] The figure marks in the drawings of the specification include: water tank 1, high-pressure water pump 2, trailer 3, water pump high-pressure hose 4, center swivel joint 5, L-beam high-pressure hose 6, first high-pressure pipe joint 7, nozzle 8, ball valve 9, solenoid valve 10, pressure relief pipe 11, safety switch 12, water immersion switch 13, normally closed relay 14, alarm 15.

[0026] Example:

[0027] A shield machine equipped with a high-pressure jet system safety operation device, as shown in the attached Figure 1 , Attachment Figure 3 , Attachment Figure 4 , Attachment Figure 5 and attached Figure 6 As shown, it includes: a high-pressure water pump 2, a central swivel joint 5, a ball valve 9, a solenoid valve 10 and a pressure relief pipe 11. The high-pressure water pump 2 is connected to the central swivel joint 5, specifically through a single water pumping high-pressure hose 4 and the central swivel joint 5. Specifically, one end of the water pumping high-pressure hose 4 is connected to the high-pressure water pump 2, and the other end of the water pumping high-pressure hose 4 passes through multiple trailers 3 of the shield machine and is connected to the central swivel joint 5. The multi-section trailer 3 uses a high-pressure hose to reduce joints and connection structures, and reduce the risk of pipeline leakage.

[0028] Among them, the water pump high-pressure hose 4 is reserved with a preset turning length at the connection of the trailer 3. At the connection of the trailer 3, a length sufficient for turning is reserved, which reduces the risk of leakage at the joint and the connection and improves safety.

[0029] The high-pressure water pump 2 is used to pressurize the water in the water tank 1 and pump it to the central rotary joint 5. Among them, there can be multiple high-pressure water pumps 2, which can speed up the water pressurization speed. In this embodiment, two high-pressure water pumps 2 are specifically used to form a high-pressure combination pump to pressurize the water to a preset pressure (in this embodiment, the water can reach 280Mpa after being pressurized by the high-pressure water pump 2).

[0030] Among them, the water tank 1 contains water mixed with colorant. Since the pressure of the jet water flow is relatively high, the smaller leakage pressure has less impact, and it is not easy to observe and find out from the data on the pressure gauge alone. By adding colorant to the water, the leakage can be easily observed through the colorant, which is convenient for operators to find and deal with it in time, avoiding the occurrence of more serious accidents.

[0031] A stirring device is also provided in the water tank 1 , and the stirring device is used to mix the colorant and water in the water tank 1 evenly.

[0032] The central swivel joint 5 is connected to the swivel center of the shield machine, the swivel center is connected to the nozzle 8 fixed inside the cutter head, and the other end of the nozzle 8 is connected to the outside.

[0033] The slewing center is connected to a high-pressure distributor through a second high-pressure pipe joint, and the high-pressure distributor is connected to the L-beam high-pressure hose 6 in the L-beam of the shield machine cutter head, and the L-beam high-pressure hose 6 is connected to the high-pressure hard pipe laid on the back of the cutter head, and the high-pressure hard pipe is connected to the nozzle 8. The use of the distributor greatly reduces the increase in the diameter of the slewing joint due to the use of multiple pipelines in the trailer 3, reduces the cramped space in the shield body and the risk of leakage caused by multiple pipelines, and improves the safety of fluid transportation.

[0034] The central swivel joint 5 is connected to the swivel center through the first high-pressure pipe joint 7 .

[0035] The center rotary joint 5 is provided with a first flow channel and a second flow channel in communication. The first flow channel and the second flow channel are perpendicular to each other, and the axis of the second flow channel is perpendicular to the axis of the rotary center. One end of the first high-pressure pipe joint 7 is in communication with the second flow channel, and the other end of the first high-pressure pipe joint 7 is in communication with the water pump high-pressure hose 4. The connecting end of the first high-pressure pipe joint 7 and the second flow channel is located in the second flow channel. By connecting the second flow channel with the first high-pressure pipe joint 7, it is possible to prevent water from leaking under high pressure or the connection joint from being disconnected; at the same time, through the structural arrangement of the first flow channel, the second flow channel and the first high-pressure pipe joint 7, if there is leakage, the joint liquid pressure will drop rapidly, preventing the liquid from leaking at an ultra-high pressure and causing serious harm to personnel and materials, thereby improving the safety of the high-pressure jet system.

[0036] A steel plate is provided on the outer surface of the L-beam high-pressure hose 6. The high-pressure pipeline in the cutter disc is located in the soil bin. The environment in the soil bin is complex. Isolated rocks, hard rocks, corrosive liquids, etc. can cause damage to the pipeline. A steel plate is used on the back of the pipeline to protect the L-beam high-pressure hose 6 in the cutter disc to reduce the risk of pipeline leakage. An observation door is provided on the steel plate, and the observation door is fixedly connected to the steel plate by bolts. It is convenient to check the connection status of the L-beam high-pressure hose 6 and its connection structure.

[0037] Among them, a steel plate is provided on the outside of the connection between the nozzle 8 and the cutter. It effectively protects the interface between the pipeline and the nozzle 8, and reduces the damage to people and objects caused by the pipeline leaking in the complex environment of the soil warehouse. An observation door is provided on the steel plate, and the observation door is fixedly connected to the steel plate by bolts. The observation door is set to facilitate the viewing of the connection status of the connection between the nozzle 8 and the cutter; the bolt connection method facilitates the installation and removal of the observation door.

[0038] The pressure relief pipe 11 is connected to the pipeline between the high-pressure water pump 2 and the central rotary joint 5 to relieve the pressure of the pipeline. The solenoid valve 10 and the ball valve 9 are connected to the pressure relief pipe 11. The solenoid valve 10 is a normally open solenoid valve 10. When the solenoid valve 10 is not powered, the corresponding pipeline is in a connected state. Before running the high-pressure water jet system, the solenoid valve 10 must be powered on to make the corresponding pipeline in a closed state.

[0039] Once the operator in the main control room mistakenly operates the button of the high-pressure water pump 2 and turns on the high-pressure water pump 2, high-pressure water will also flow out from the pipelines of the solenoid valve 10 and the ball valve 9. The pressure of the high-pressure water is unloaded at the larger outlet and flows to the bottom of the trailer 3. However, the pressure of the water jet nozzle 8 is unloaded due to the long distance, and the small water flow and low pressure will not cause harm to the operator in the soil bin. In another case, the operator mistakenly operates the button of the solenoid valve 10 at the same time. The solenoid valve 10 is a normally open type, and it will close the pipeline flow when it is energized. At this time, the high-pressure water will also flow out and unload along the pipeline of the other ball valve 9. The setting of the ball valve 9 pipeline is also to prevent the misoperation of the button of the solenoid valve 10, which causes the pressure to be unable to be unloaded, and the high-pressure water causes personal injury to the operator at the front end of the cutter disc.

[0040] The ball valve 9 and the solenoid valve 10 are connected to the pressure relief pipe 11 through a tee. The connection through the tee reduces the number of connection points and valves, reduces the risk of system leakage, and improves the reliability and stability of the system.

[0041] The pressure relief pipe 11 is a high-pressure hose. The other end of the pressure relief pipe 11 is located at the bottom of the trailer 3.

[0042] A safety switch 12 is connected in series to the control circuit of the solenoid valve 10, and the ball valve 9 and the safety switch 12 are set in linkage. When the ball valve 9 is opened, the safety switch 12 is disconnected, and when the ball valve 9 is closed, the safety switch 12 is closed. An additional safety switch 12 is provided, and its opening and closing state is controlled by the ball valve 9, so that the solenoid valve 10 can be prevented from being accidentally energized and closed when the safety device is opened for maintenance.

[0043] There is a water shield on the outside of the tee, and a water receiving tray is provided under the water shield. A water leakage detection alarm circuit is provided in the water receiving tray. Figure 2The water leakage detection alarm circuit includes a water immersion switch 13, a normally closed relay 14, a power supply and an alarm 15 connected in series. The two electrodes of the water immersion switch 13 are inserted into the water receiving tray. The water immersion switch 13, the normally closed relay 14, the power supply and the alarm 15 form a complete closed circuit. The output control end of the normally closed relay 14 is connected in series to the control circuit of the solenoid valve 10. When a leak occurs at the three-way, water will flow into the water receiving tray under the action of the water shield. After the two electrodes of the water immersion switch 13 encounter the leaked water in the water receiving tray, the entire circuit will be turned on, so that the alarm 15 is powered on and an alarm is sounded. At the same time, the normally closed relay 14 is in an open state, so that the control circuit of the solenoid valve 10 cannot be turned on, and the solenoid valve 10 is in an open state.

[0044] The specific implementation process is as follows:

[0045] When the high-pressure water jet system is operating normally, the ball valve 9 is closed, and the solenoid valve 10 is energized to close the pipeline. Once the ball valve 9 pipeline is not closed or the solenoid valve 10 pipeline is not closed, high-pressure water will flow out from the pressure relief pipe 11, which can remind personnel to handle it and ensure the normal operation of the high-pressure water jet. If a leak occurs in the high-pressure water jet system, by observing the colored position of the overall structure, it is possible to quickly know whether a leak occurs and the location of the leak, and timely handle it to ensure the normal operation of the high-pressure water jet system.

[0046] When the high-pressure water jet system operates normally and a leak occurs at the tee, water will flow into the water collecting pan under the action of the water retaining cover. When the two electrodes of the water immersion switch encounter the leaked water in the water collecting pan, the entire circuit will be turned on, so that the alarm will be energized and an alarm will be sounded. At the same time, the normally closed relay is in the open state, so that the control circuit of the solenoid valve 10 cannot be turned on. The solenoid valve 10 is in the open state, realizing water drainage and pressure relief, and avoiding further damage to the connecting pipelines of the high-pressure water pump and the center swivel joint.

[0047] When the cutter head tool needs to be inspected and repaired, the high-pressure water jet system is stopped, that is, the high-pressure water pump 2 is turned off, and the ball valve 9 is opened at the same time to connect the high-pressure water pump 2 with the pressure relief pipe 11. When the high-pressure water pump 2 is opened by mistake, the high-pressure water will enter the pressure relief pipe 11 through the solenoid valve 10 and the ball valve 9, reducing the water pressure at the nozzle 8 to ensure the safety of the operator in the cutter head; at the same time, when the solenoid valve 10 is operated by mistake, due to the setting of the safety switch, the solenoid valve 10 cannot be energized, and the solenoid valve 10 still remains in the open state. The pipeline of the solenoid valve 10 will continue to drain and relieve pressure to avoid the situation where the pressure cannot be unloaded, thereby ensuring the safety of the operator in the cutter head.

[0048] This scheme uses coloring agents. When a high-pressure water jet system leaks, by observing the coloring position of the overall structure, it is possible to quickly know whether a leak has occurred and the location of the leak, and to handle it in time to ensure the normal operation of the high-pressure water jet system; when the high-pressure water jet is operating normally, even if the main control room misoperates and the corresponding pipelines of the ball valve 9 and the solenoid valve 10 are not closed, the high-pressure water flowing out through the pressure relief pipe 11 can also remind personnel to handle it in time to ensure the normal operation of the high-pressure water jet; when the cutter head is undergoing maintenance work or checking and replacing the cutter, whether the high-pressure water pump 2 or the solenoid valve 10 of the safety operation device is misoperated in the main control room, the safety operation device can unload the pressure of the high-pressure water, and play a protective blocking mechanism against the personal injury of the high-pressure water jet to the operator; and the safety operation device has low manufacturing cost and low operating cost, and plays a great protective role. It ensures the safe operation of the shield machine equipped with high-pressure water jets.

[0049] The above is only an embodiment of the present invention, and the common knowledge such as the known specific technical schemes and / or characteristics in the scheme is not described in detail here. It should be pointed out that for those skilled in the art, several variations and improvements can be made without departing from the technical scheme of the present invention. In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like 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, or it can be the internal connection of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances. The scope of protection claimed in this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A shield machine equipped with a high-pressure jet system safety operation device, characterized in that: include: A high-pressure water pump, a center rotary joint, a ball valve, a solenoid valve and a pressure relief pipe, the pressure relief pipe is connected to the connecting pipeline of the high-pressure water pump and the center rotary joint, the solenoid valve and the ball valve are connected in parallel to the pressure relief pipeline, the center rotary joint is connected to the rotation center of the shield machine, the rotation center is connected to the nozzle fixed inside the cutter head, the other end of the nozzle is connected to the outside world, and the solenoid valve is a normally open solenoid valve.

2. A shield machine equipped with a high-pressure jet system safety operation device according to claim 1, characterized in that: The ball valve and the solenoid valve are connected to the pressure relief pipe through a three-way connection.

3. A shield machine equipped with a high-pressure jet system safety operation device according to claim 2, characterized in that: A safety switch is serially connected to the control circuit of the solenoid valve, and the ball valve and the safety switch are arranged in linkage. When the ball valve is opened, the safety switch is disconnected, and when the ball valve is closed, the safety switch is closed.

4. A shield machine equipped with a high-pressure jet system safety operation device according to claim 3, characterized in that: A water retaining cover is provided on the outside of the tee, a water collecting pan is provided below the water retaining cover, a water leakage detection alarm circuit is provided in the water collecting pan, and the water leakage detection alarm circuit includes a water immersion switch, a normally closed relay, a power supply and an alarm connected in series, and the normally closed relay is connected in series to the control circuit of the solenoid valve.

5. The shield machine equipped with a high-pressure jet system safety operation device according to claim 1, characterized in that: The high-pressure water pump is connected to the central swivel joint through a single water pump high-pressure hose. The swivel center is connected to a high-pressure distributor through a second high-pressure pipe joint. The high-pressure distributor is connected to the L-beam high-pressure hose in the L-beam of the shield machine cutter head. The L-beam high-pressure hose is connected to the high-pressure hard pipe laid on the back of the cutter head, and the high-pressure hard pipe is connected to the nozzle.

6. A shield machine equipped with a high-pressure jet system safety operation device according to claim 4, characterized in that: One end of the water pumping high-pressure hose is communicated with the high-pressure water pump, and the other end of the water pumping high-pressure hose passes through a plurality of trailers of the shield machine and is communicated with the central swivel joint.

7. A shield machine equipped with a high-pressure jet system safety operation device according to claim 4, characterized in that: The central swivel joint is connected to the swivel center through a first high-pressure pipe joint.

8. The shield machine equipped with a high-pressure jet system safety operation device according to claim 6, characterized in that: A first flow channel and a second flow channel are connected in the central swivel joint, the first flow channel and the second flow channel are perpendicular to each other, the axis of the second flow channel is perpendicular to the axis of the swivel center, one end of the first high-pressure pipe joint is connected to the second flow channel, and the other end of the first high-pressure pipe joint is connected to a water pump high-pressure hose, and the connecting end of the first high-pressure pipe joint and the second flow channel is located in the second flow channel.

9. A shield machine equipped with a high-pressure jet system safety operation device according to claim 4, characterized in that: The high-pressure water pump is used to transport the high-pressure water added with the colorant in the shield machine water tank to the water pump high-pressure hose.

10. The shield machine equipped with a high-pressure jet system safety operation device according to claim 1, characterized in that: The outer surface of the L-beam high-pressure hose is provided with a steel plate.

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