Slurry shield connection device brake system and brake method

Abstract

The present application relates to the technical field of shield machine, in particular to a mud water shield machine pipe connector brake system and a brake method, comprising: a hydraulic pump, an input end connected to an oil tank, and an output end connected to a first loading valve and an oil circuit module hydraulic pump port; an oil circuit module, comprising a hydraulic pump port, an oil tank port, a pressurizing port and an oil return port, the hydraulic pump port being connected to the hydraulic pump, and the oil tank port being connected to the oil tank; a hydraulic motor; a brake coaxially connected to the hydraulic motor, comprising a brake state and a release state, in the brake state. Through the designed pipe connector brake system, in the pipe connection, the non-moving state, the brake is used to lock the hydraulic motor, the problem of uphill and downhill coasting of the pipe connection device and small range inertia action is solved from the root, the safety and stability of the shield machine are improved, at the same time, in the tunneling state, the brake is released by the kinetic energy of the accumulator, the hydraulic pump station does not need to be started all the time, and resources are saved.

Description

Technical Field

[0001] This invention relates to the field of tunnel boring machine technology, and more specifically to a braking system and method for a slurry tunnel boring machine connector. Background Technology

[0002] During the tunneling process of a slurry shield machine, due to the uphill or downhill slope of the tunnel design, the shield machine inevitably needs to connect to the slurry pipe during the uphill or downhill phases. When disconnecting the slurry pipe and connecting to a new pipe, causing the overall pipeline to lengthen, it is easy to cause slippage of the connector, which may lead to a safety accident in severe cases. Alternatively, when operating the connector to move and connect to the slurry pipe, the connector may experience a small range of inertial movement, making it difficult to align the slurry pipeline connection flanges, thus affecting the construction progress.

[0003] Existing technical documents

[0004] Patent Document 1: CN217400899U A Continuous Tube Extension Device

[0005] Patent Document 2: CN110145324A A shield tunneling machine pipe extension device and a method for connecting mud pipes inside the tunnel Summary of the Invention

[0006] The first aspect of this invention proposes a technical solution: a braking system for a slurry shield tunneling machine connector, comprising:

[0007] A hydraulic pump, with its input end connected to an oil tank and its output end connected to a first loading valve;

[0008] The oil circuit module includes a hydraulic pump port, an oil tank port, a pressurization port, and a return port. The hydraulic pump port is connected to the hydraulic pump, and the oil tank port is connected to the oil tank.

[0009] Hydraulic motor;

[0010] A brake, coaxially connected to the hydraulic motor, includes a braking state and a release state. In the braking state, it is used to lock the shaft of the hydraulic motor. In the release state, the hydraulic motor can rotate freely.

[0011] The second loading valve has its input end connected to the pressurization port of the oil circuit module and its output end connected to the input end of the brake.

[0012] A reversing valve, connected to the oil circuit module and the hydraulic motor, is used to control the forward and reverse rotation of the hydraulic motor;

[0013] in,

[0014] It also includes a third loading valve, the input of which is connected to the output of the second loading valve, and the output of which is connected to the oil tank port;

[0015] The input end of the second loading valve is equipped with a pressure reducing valve, and the output end of the pressure reducing valve is equipped with an accumulator and a first pressure switch;

[0016] The brake includes a braking state and a released state. The brake switches from the braking state to the released state only when the second loading valve applies pressure to the brake, and the hydraulic motor releases the brake.

[0017] Preferably, the second loading valve is configured to be energized when either condition 1 or condition 2 is met, wherein condition 1 is that the first pressure switch is opened, and condition 2 is that the reversing valve is opened.

[0018] Preferably, in the tunneling mode, when the hydraulic pump and the first loading valve are opened, the pressurization port of the oil circuit module is pressurized. When the pressure increases to the pressure of the inert gas charged in the accumulator, the accumulator begins to accumulate pressure. When the first pressure switch outputs a pressure switch open signal, the second loading valve opens to apply pressure to the brake. When the second pressure switch outputs a pressure switch open signal, the brake is released.

[0019] Preferably, when the accumulator pressure decreases to less than the pressure threshold of the first pressure switch, the hydraulic pump and the first loading valve are opened again to pressurize the accumulator until the accumulator is pressurized to a preset value.

[0020] Preferably, when the tunnel boring machine is in the takeover mode, the hydraulic pump, the first loading valve, and the reversing valve are open, the hydraulic motor is in operation. At this time, the second loading valve applies pressure to the brake, and the brake switches from the braking state to the released state. When the reversing valve is closed, the second loading valve is closed, the third loading valve is open, and the pressurized fluid flows back from the brake to the oil tank through the third loading valve, and the brake switches from the released state to the braking state.

[0021] Preferably, the accumulator comprises a sealed container filled with an inert gas.

[0022] Preferably, the output end of the second loading valve is provided with a second pressure switch, which outputs a pressure signal when the second loading valve applies pressure to the brake.

[0023] The second aspect of this invention proposes a technical solution: a braking method for a slurry shield tunneling machine connector, characterized in that, using the aforementioned slurry shield tunneling machine connector braking system, it includes the following steps:

[0024] Step 1: Pressurize the oil circuit module using a hydraulic pump;

[0025] Step 2: When the pressure in the oil circuit module increases to the pressure of the inert gas charged in the accumulator, the accumulator is pressurized.

[0026] Step 3: When condition a or condition b is met, the second loading valve is opened, the accumulator pressurizes the brake, and the brake is switched from the braking state to the release state.

[0027] Among them, condition a is that the accumulator is pressurized for the first time in tunneling mode and reaches the second pressure value, and condition b is that the reversing valve is opened.

[0028] Preferably, when condition a is met, and when the system pressure drops to the point where the first pressure switch has no output, the hydraulic pump and the first loading valve are controlled to pressurize the accumulator, and the pressurization is stopped when the accumulator is pressurized to a preset value, that is, when the first pressure switch outputs the upper limit pressure signal.

[0029] Preferably, the directional valve is configured to close simultaneously with the hydraulic pump, the first loading valve, and the second loading valve.

[0030] Compared with the prior art, the advantages of the present invention are as follows:

[0031] By designing a connecting pipe braking system, the hydraulic motor is locked by a brake when the connecting pipe is in a non-moving state. This fundamentally solves the problem of slippage of the connecting pipe device on uphill and downhill slopes and small-range inertial movements, improving the safety and stability of the tunnel boring machine. At the same time, during the tunneling process, the brake is released using the kinetic energy of the accumulator, eliminating the need for the hydraulic pump station to be constantly running, thus saving resources. Attached Figure Description

[0032] The accompanying drawings are not intended to be drawn to scale. In the drawings, each identical or nearly identical component shown in the various figures may be denoted by the same reference numeral. For clarity, not every component is labeled in each figure. Embodiments of various aspects of the invention will now be described by way of example and with reference to the accompanying drawings, wherein:

[0033] Figure 1 This is a schematic diagram of the mud discharge state of the mud pipe of the slurry shield machine shown in this invention;

[0034] Figure 2 This is a schematic diagram of the slurry shield tunneling machine connector in the connector state as shown in this invention;

[0035] Figure 3 This is a schematic diagram of the braking system of the slurry shield tunneling machine connector shown in this invention;

[0036] Figure 4 This is a schematic diagram of the accumulator's energy storage state in the slurry shield tunneling machine connector braking system shown in this invention.

[0037] Figure 5 This is a schematic diagram of the accumulator pressurizing the brake in the slurry shield tunneling machine connector braking system shown in this invention.

[0038] Figure 6 This is a schematic diagram of the brake being pressurized when the reversing valve is activated in the slurry shield tunneling machine connector braking system shown in this invention.

[0039] Figure 7 This is a schematic diagram of the brake being depressurized by the third loading valve in the slurry shield tunneling machine connecting pipe braking system shown in this invention. Detailed Implementation

[0040] To better understand the technical content of the present invention, specific embodiments are described below in conjunction with the accompanying drawings.

[0041] Combination Figure 1 As shown, the slurry shield tunneling machine is in the tunneling state. The extension of the telescopic pipe 2 ensures a smooth slurry discharge path from the second opening of the tee pipe 1 to the connecting pipe 3. When the telescopic pipe 2 is extended to its maximum length, combined with... Figure 2 As shown, the second pipe opening is sealed to allow the mud to be discharged from the first pipe opening - telescopic pipe 2 - connecting pipe 3. At this time, a new connecting pipe 3 needs to be added between the tee pipe 1 and the connecting pipe 3.

[0042] When operating the connector to move and connect to the mud pipe, the connector may experience a small range of inertial movement, especially when going downhill, making it difficult to connect with the flange of the connecting pipe 3. In inclined tunnel sections, the connector may slip, which could lead to a safety accident in severe cases.

[0043] Therefore, the present invention aims to lock the non-moving state of the connector during the connection process. In addition, when the equipment is in the tunneling state, the brake is kept in the released state, and the hydraulic pump station does not need to be in the running state at all times.

[0044]

Mass-water shield tunneling machine connector braking system

[0045] The first aspect of this invention proposes a technical solution: a braking system for a pipe connector of a slurry shield tunneling machine, which mainly includes a hydraulic pump 10, an oil tank, an oil circuit module 20, a hydraulic motor 60, a brake 50, and a reversing valve 30. The hydraulic motor 60 serves as the driver of the pipe connector, the hydraulic pump 10 provides power to the hydraulic motor 60, and the reversing valve 30 can control the forward and reverse rotation of the hydraulic motor 60.

[0046] Combination Figure 3 As shown, the input end of the hydraulic pump 10 is connected to the oil tank, and the output end is connected to the first loading valve 201 and the hydraulic pump port (P port) of the oil circuit module; the oil circuit module 20 includes a hydraulic pump port (P port), an oil tank port (T port), a pressurization port (A port), and a return port (B port). The hydraulic pump port (P port) is connected to the hydraulic pump, and the oil tank port (T port) is connected to the oil tank.

[0047] In a specific embodiment, a filter is connected between the oil tank port (T port) and the oil tank to improve the cleanliness of the returned oil.

[0048] The hydraulic motor 60 is connected to the pressurization port (port A) and return port (port B) of the oil circuit module 20 through the reversing valve 30. By controlling the opening and closing of different ports of the reversing valve 30, the hydraulic motor 60 can be controlled to enter or exit oil on the left or right side, thereby controlling the forward or reverse rotation of the hydraulic motor 60.

[0049] Furthermore, in order to control the hydraulic motor 60 to stop in a reliable position, a brake 50 is coaxially mounted on the hydraulic motor 60 and connected to the pressurization port (X port) of the oil circuit module 20; the input end of the second loading valve 401 is connected to the pressurization port (A port) of the oil circuit module 20, and the output end is connected to the input end of the brake 50.

[0050] Furthermore, the brake 50 includes a braking state and a release state. The brake 50 switches from the braking state to the release state only when the second loading valve 401 applies pressure to the brake 50, and the hydraulic motor 60 releases the brake.

[0051] Furthermore, it also includes a third loading valve 21. The input end of the third loading valve 21 is connected to the output end of the second loading valve 401, and the output end of the third loading valve 21 is connected to the oil tank port. The third loading valve 21 is designed to provide a return oil channel for the brake 50. When the second loading valve 401 no longer provides pressure to the brake 50, the third loading valve 21 is opened, and the oil loaded by the brake 50 flows back to the oil tank from the third loading valve 21, and the brake 50 resumes its braking effect on the hydraulic motor 60.

[0052] Combination Figure 3 As shown, when the second loading valve 401 is opened, the oil circuit module 20 can pressurize the brake 50 to release the brake 50. The second loading valve is set to be energized when either condition 1 or condition 2 is met. Condition 1 is when the first pressure switch 403 is opened, and condition 2 is when the reversing valve 30 is opened.

[0053] Furthermore, the equipment has a tunneling state and a connection state. Understandably, in the tunneling state, it is not necessary to brake the connection device, while releasing the brake requires starting the hydraulic pump. Therefore, in order to minimize the energy consumption of the hydraulic pump.

[0054] Combination Figure 4As shown, the input end of the second loading valve 401 is equipped with a pressure reducing valve 402, and the output end of the pressure reducing valve 402 is equipped with an accumulator 40 and a first pressure switch 403. When the hydraulic pump 10 and the first loading valve 201 are started, they pressurize the oil circuit module 20. When the pressure increases to the pressure of the inert gas charged in the accumulator, the accumulator 40 begins to accumulate pressure. When the first pressure switch 403 outputs a pressure signal, the second loading valve 401 opens, applying pressure to the brake 50. When the second pressure switch 304 outputs a pressure signal, the brake 50 is released. Accumulation stops when the accumulator 40 accumulates pressure to a preset value, i.e., when the first pressure switch 403 outputs an upper limit pressure signal.

[0055] In an optional embodiment, the accumulator 40 includes a sealed container filled with an inert gas, which is compressed to store pressure when oil enters.

[0056] Preferred, combined Figure 5 As shown, when the pressure in the accumulator 40 decreases to less than the pressure threshold when the first pressure switch 403 is opened, the hydraulic pump 10 and the first loading valve 201 are opened again to pressurize the accumulator 40 and maintain the pressure until the accumulator 40 is pressurized to a preset value, that is, the first pressure switch 403 outputs the upper limit pressure signal and then stops pressurizing.

[0057] Combination Figure 6 As shown, when the tunnel boring machine is in the pipe-connection mode, and it is desired that the pipe-connection device is in a non-moving state, the brake 50 is in the braking state. Therefore, when the hydraulic pump, the first loading valve 201, and the reversing valve 30 are opened, the hydraulic motor is in the operating state. At this time, the second loading valve 401 applies pressure to the brake 50, and the brake 50 switches from the braking state to the released state.

[0058] Combination Figure 7 As shown, when the reversing valve 30 is closed, that is, the connector does not need to move, the second loading valve 401 is closed and the third loading valve 21 is opened. The booster fluid flows back from the brake 50 to the oil tank through the third loading valve 21, and the brake 50 switches from the released state to the braking state.

[0059] Preferably, the output end of the second loading valve 401 is equipped with a second pressure switch 304, wherein the second pressure switch 304 is located in the path of pressurizing the brake 50. When the second loading valve 401 applies pressure to the brake 50, the second pressure switch 304 outputs a pressure signal. At this time, the second pressure switch 304 sends a pressure signal to the cab. After receiving the pressure signal from the second pressure switch 304, the cab indicates that the brake has been released and tunneling can proceed.

[0060] Braking method for the connector of a slurry shield tunneling machine

[0061] The second aspect of this invention proposes a technical solution: a braking method for a slurry shield tunneling machine connector, using the aforementioned slurry shield tunneling machine connector braking system, comprising the following steps:

[0062] Step 1: Pressurize the oil circuit module using hydraulic pump 10;

[0063] Step 2: When the pressure in the oil circuit module 20 increases to the pressure of the inert gas charged in the accumulator, the accumulator 40 is pressurized.

[0064] Step 3: When condition a or condition b is met, the second loading valve 401 is opened, the accumulator 40 pressurizes the brake 50, and the brake 50 is switched from the braking state to the release state.

[0065] Among them, condition a is that the accumulator is pressurized for the first time in the tunneling mode and reaches the second pressure value, and condition b is that the reversing valve 30 is opened.

[0066] The control condition for opening the directional valve 30 is that the loading valve 301 is controlled to open. For example, when the connecting pipe moves back and forth, the loading valve 301 is opened.

[0067] Preferably, when condition a is met, and when the system pressure drops to the point where the first pressure switch 403 has no output, the hydraulic pump 10 and the first loading valve 201 are controlled to pressurize the accumulator 40, and the pressurization is stopped when the accumulator 40 is pressurized to the preset value, that is, when the first pressure switch 403 outputs the upper limit pressure signal.

[0068] In a specific embodiment, when the first pressure switch 403 has no pressure output signal, the hydraulic pump 10 and the first loading valve 201 are automatically started to replenish pressure to the accumulator 40 and the system. After the hydraulic pump 10 has finished starting, the first loading valve 201 is energized for 20 seconds and the first pressure switch 403 outputs a pressure upper limit signal, at which point the hydraulic pump automatically stops. In this way, while maintaining pressure on the brake 50, energy is saved.

[0069] Preferably, the directional valve 30 is configured to close simultaneously with the hydraulic pump 10, the first loading valve 201, and the second loading valve 401, while the third loading valve 21 is open. This ensures that the brake 50 immediately switches from the released braking state to the braking state after the connecting pipe stops moving.

[0070] In a specific embodiment, the tunneling mode is as follows: when the braking device is first released, the hydraulic pump station needs to charge the system; when the hydraulic pump 10 is started, the first loading valve 201 is energized, the reversing valve 30 is de-energized, and the loading valve 301 is de-energized.

[0071] When the system pressure rises, the accumulator 40 charges. Once the system pressure exceeds the set pressure of the pressure reducing valve 402, the system working pressure becomes the set pressure of the pressure reducing valve 402.

[0072] The first pressure switch 403 outputs a pressure signal, the second loading valve 401 is energized, and the third loading valve 21 is de-energized;

[0073] The second pressure switch 304 outputs a pressure signal, the hydraulic motor 60 is released from the brake and is in a floating state. At the same time, the hydraulic pump 10 stops, and the accumulator 40 continues to supply power to release the hydraulic motor brake.

[0074] After receiving the pressure signal from the second pressure switch 304, the operator's cab can begin tunneling.

[0075] When the first pressure switch 403 has no pressure output signal, the hydraulic pump 10 and the first loading valve 201 are automatically started to replenish the pressure of the accumulator 40 and the system. After the hydraulic pump 10 has started, the first loading valve 201 is energized for 20 seconds and the first pressure switch 403 outputs the upper pressure limit signal. Then, the hydraulic pump 10 stops automatically.

[0076] In the control mode: the brake is released only when the hydraulic motor 60 is activated; if the control device moves forward, the hydraulic pump 10 is started, the first loading valve 201 is energized, the accumulator 40 is charged, the second loading valve 401 is energized, the third loading valve 21 is de-energized, the hydraulic motor 60 is released from braking, the directional valve 30 is energized, the loading valve 301 is energized, and the control device moves forward; after moving to the predetermined position, the directional valve 30 is de-energized, the loading valve 301 is de-energized, the first loading valve 201, the second loading valve 401 are de-energized, the third loading valve 21 is energized, the hydraulic motor 60 is braked, and the control device stops.

[0077] In conjunction with the above embodiments, the designed pipe connector braking system locks the hydraulic motor with a brake during pipe connection in the non-moving state, fundamentally solving the problem of slippage of the pipe connector on uphill and downhill slopes and small-range inertial movements, thus improving the safety and stability of the tunnel boring machine. At the same time, during tunneling, the accumulator kinetic energy is used to release the brake, eliminating the need for the hydraulic pump station to be constantly running, thus saving resources.

[0078] While the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the invention. Those skilled in the art can make various modifications and refinements without departing from the spirit and scope of the invention. Therefore, the scope of protection of the present invention shall be determined by the claims.

Claims

1. A slurry shield machine adapter brake system, characterized by, The hydraulic pump is connected to the oil tank at the input end and connected to the first loading valve at the output end. The oil circuit module comprises a hydraulic pump port, an oil tank port, a pressurized port, and a return oil port, wherein the hydraulic pump port is connected to the hydraulic pump, and the oil tank port is connected to the oil tank. The hydraulic motor is coaxially connected to the brake and comprises a braking state and a releasing state. The second loading valve is connected to the pressurized port of the oil circuit module at the input end and connected to the input end of the brake at the output end. The reversing valve is connected to the oil circuit module and the hydraulic motor and is used to control the forward and reverse rotation of the hydraulic motor. The third loading valve is connected to the output end of the second loading valve at the input end and connected to the oil tank port at the output end. The input end of the second loading valve is provided with a pressure reducing valve, and the output end of the pressure reducing valve is provided with an accumulator and a first pressure switch. The first pressure switch comprises a pressure switch opening signal and a pressure upper limit signal. Only when the second loading valve pressurizes the brake, the brake is switched from the braking state to the releasing state, and the hydraulic motor is released from the brake. The second loading valve is powered when condition 1 or condition 2 is met, wherein condition 1 is that the first pressure switch is opened, and condition 2 is that the reversing valve is opened. The output end of the second loading valve is provided with a second pressure switch, which outputs a pressure signal when the second loading valve loads pressure to the brake. When the hydraulic pump and the first loading valve are opened, the pressurized port of the oil circuit module is pressurized, and when the pressure increases to the pressure of the inert gas filled in the accumulator, the accumulator starts to accumulate pressure.

2. The slurry shield tunnel junction brake system according to claim 1, wherein, When the pressure of the accumulator decreases to less than the pressure threshold at which the first pressure switch is opened, the hydraulic pump and the first loading valve are opened again to pressurize the accumulator until the accumulator accumulates to a preset value, i.e., the first pressure switch outputs an upper limit pressure signal.

3. The slurry shield tunnel junction adapter brake system according to claim 1, wherein, When the hydraulic pump, the first loading valve, and the reversing valve are opened, the hydraulic motor is in the action state, at this time, the second loading valve loads pressure to the brake, and the brake is switched from the braking state to the releasing state.

4. The slurry shield tunnel junction adapter brake system according to claim 3, wherein, The accumulator comprises a sealed container filled with inert gas.

5. The slurry shield tunnel junction adapter brake system according to claim 4, wherein, ​ 6. The slurry shield tunnel junction breaker system according to claim 1, wherein, ​ 7. The slurry shield tunnel junction adapter brake system according to any one of claims 1-6, wherein, ​

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