A slurry shield machine, a pipe changing protection device and a construction method thereof

Abstract

This invention provides a slurry shield tunneling machine, its pipe replacement protection device, and construction method, belonging to the field of shield tunneling machine technology. The pipe replacement protection device includes a protective cover with an inlet. A transfer chamber is located inside the cover at the inlet. The transfer chamber includes a movable plate. When the movable plate is closed, the transfer chamber remains sealed; when the movable plate is open, the slurry pipe is moved out. A transfer frame is installed at the inlet. A drive mechanism is installed on the cover to move the transfer frame between the outside of the cover and the transfer chamber. When the transfer frame moves into the transfer chamber, the inlet is sealed, or a sealing plate is installed on the cover to seal the inlet. During use, the transfer chamber remains sealed before the movable plate is opened. Therefore, during the process of receiving the external slurry pipe and moving the transfer frame into the transfer chamber, asbestos fibers can be prevented from leaking out of the inlet. When the transfer frame moves into the transfer chamber, the inlet is sealed, preventing asbestos fibers from leaking out of the inlet during the process of the movable plate opening and removing the slurry pipe.

Description

Technical Field

[0001] This invention relates to a slurry shield tunneling machine, its pipe replacement protection device, and construction method, belonging to the field of shield tunneling machine technology. Background Technology

[0002] Asbestos is present in strata such as serpentine, tremolite, actinolite, and tremolite during tunnel construction. Asbestos has high fire resistance, electrical insulation, and heat insulation properties, making it an important fireproof, insulating, and heat-insulating material. However, because asbestos fibers can cause diseases such as asbestosis and pleural mesothelioma, posing a significant threat to the health of workers, reliable asbestos protection and treatment measures are necessary.

[0003] Even with closed-loop slag removal, there are still several factors that could cause asbestos fibers in the slurry to diffuse into the air. For example, during the replacement and maintenance of the slurry pipeline, the pipeline extension device on the trailer needs to be used to regularly replace the extended slurry inlet and outlet pipelines. During the replacement process, a small amount of slurry may not be completely discharged and may leak onto the trailer platform, leading to the overflow of asbestos fibers from the slurry.

[0004] In response, Chinese utility model patent CN217080457U discloses a pipe replacement protection device and a slurry shield tunneling machine. The pipe replacement protection device includes a protective cover, which includes a cover body. The cover body includes a top wall, a bottom wall, and a front wall, a rear wall, and a side wall connecting the top wall and the bottom wall. The rear wall has an opening for the slurry pipe (i.e., mud pipe) and valves on the slurry pipe to pass through. The cover body is equipped with a negative pressure exhaust device to create a negative pressure environment inside the cover body. A protective door is provided at the opening, and the protective door has a through hole corresponding to the slurry pipe. When the protective door is open, the valves of the slurry pipe can pass through. When the protective door is closed, it can block the airflow to assist the negative pressure exhaust device in creating a negative pressure environment inside the cover body.

[0005] The aforementioned pipe replacement protection device can prevent asbestos fibers from leaking out to a certain extent by setting up a protective cover and drawing negative pressure. However, since the mud pipes that need to be installed are of a certain length, usually several meters or more than ten meters, when the mud pipe is sent into the protective cover from the outside, a relatively long inlet is required on the protective cover. The negative pressure environment inside the protective cover is maintained by a negative pressure ventilation device. When the inlet is relatively large, it is difficult to guarantee the negative pressure at the inlet, which causes asbestos fibers to leak out from the inlet during the process of the mud pipe entering the protective cover, resulting in poor protection. Summary of the Invention

[0006] The purpose of this invention is to provide a protective device for pipe replacement in a slurry shield tunneling machine, so as to solve the problem that asbestos fibers easily overflow from the inlet during the process of the existing slurry pipe entering the protective cover; the purpose of this invention is also to provide a slurry shield tunneling machine and a construction method for the slurry shield tunneling machine, so as to solve the above problems.

[0007] To achieve the above objectives, the slurry shield tunneling machine pipe replacement protection device of the present invention adopts the following technical solution:

[0008] A protective device for pipe replacement in a slurry shield tunneling machine includes a protective cover for enclosing the area where the slurry pipe is replaced and creating a negative pressure environment. The protective cover includes a cover body with an inlet for the entry of external slurry pipes. A transfer chamber is provided inside the cover body at the inlet. The transfer chamber includes a movable plate that can be closed and opened. When the movable plate is closed, the transfer chamber is kept closed. When the movable plate is opened, the slurry pipe inside the transfer chamber can be removed. A transfer frame is installed at the inlet for receiving the slurry pipes outside the cover body and transferring them to the transfer chamber. A drive mechanism is installed on the cover body for moving the transfer frame between the outside of the cover body and the transfer chamber. When the transfer frame moves into the transfer chamber, the inlet is blocked, or a sealing plate is additionally installed on the cover body to block the inlet.

[0009] The beneficial effects of the above technical solution are as follows: The present invention provides a transfer chamber at the inlet within the enclosure. The transfer chamber includes a movable plate that can be closed and opened. A transfer frame is installed at the inlet, and a driving mechanism is installed on the enclosure to move the transfer frame between the outside of the enclosure and the transfer chamber. When the transfer frame moves to the outside of the enclosure, it can receive the external mud pipe. During this process, the movable plate can be closed to keep the transfer chamber sealed, preventing asbestos fibers from leaking out from the inlet. After the transfer frame carrying the mud pipe moves into the transfer chamber, the inlet is sealed by the transfer frame itself or by a sealing plate installed on the enclosure. Then the movable plate is opened, which facilitates the removal of the mud pipe from the transfer frame while preventing asbestos fibers from leaking out from the inlet, achieving a very good protective effect.

[0010] Furthermore, the bottom of the transfer frame is hinged to the cover, and the drive mechanism is a telescopic drive mechanism hinged between the cover and the transfer frame to control the transfer frame's receiving interface to rotate out of the cover or into the transfer cavity.

[0011] The advantages of the above technical solution are as follows: the transfer frame is hinged, and the telescopic drive mechanism is hinged between the cover and the transfer frame. It can control the rotation of the transfer frame so that the receiving interface of the transfer frame can be rotated out to the outside of the cover for easy reception of mud pipes, or rotated into the transfer cavity to realize the entry of mud pipes into the inside of the cover. The overall installation method is simple and easy to control.

[0012] Furthermore, the transfer frame includes two support plates arranged in a V-shape, with one end of the two support plates intersecting and hinged to the cover, and the other end forming the receiving interface.

[0013] The advantages of the above technical solution are: the two V-shaped support plates facilitate the support of the mud pipe and can adapt to mud pipes of different diameters. The structure is simple, easy to process and manufacture, and has strong applicability.

[0014] Furthermore, the hinge position between the transfer frame and the cover is located at the edge of the cover, so that when the transfer frame is rotated into the transfer cavity, the outer support plate just blocks the inlet.

[0015] The advantages of the above technical solution are: the inlet is blocked by the support plate of the transfer frame itself, eliminating the need for a separate sealing plate, and the structure is simple, convenient to process, manufacture and use.

[0016] Furthermore, a vertical plate is fixed to the bottom of the cover, and the movable plate is a cover plate set above the vertical plate. The closed transfer cavity is formed by at least the cover plate, the vertical plate, and the cover.

[0017] The advantages of the above technical solution are: it utilizes the structure of the cover itself, which is simple and convenient for forming a transfer cavity.

[0018] Furthermore, one end of the cover plate is hinged to the inner wall of the enclosure. Inside the enclosure, there is a drive device that is connected to the cover plate to drive the cover plate to rotate upward to open or downward to close. When the cover plate is closed, its edge contacts the vertical plate.

[0019] The advantages of the above technical solution are as follows: the cover plate is hinged and equipped with a driving device, which makes it easy to open and close; when the cover plate is closed, the edge contacts the vertical plate, the structure is simple, and it is easy to form a closed transfer cavity.

[0020] Furthermore, the rear of the protective cover is equipped with a detachable protective door for the passage of the mud pipe and the gate valve on the mud pipe. A water curtain is installed on the front side of the protective door to increase air humidity through spraying, thereby preventing the spread of asbestos fibers.

[0021] The beneficial effects of the above technical solution are as follows: the protective door is detachable, which facilitates the passage of mud pipes and gate valves on the mud pipes after disassembly. At the same time, a water curtain is set on the front side of the protective door, which can increase the air humidity through spraying, thereby preventing the spread of asbestos fibers and achieving a better protective effect.

[0022] Furthermore, the protective door includes a first protective door and a second protective door arranged at an interval, with enclosed spaces formed between the first protective door and the cover, and between the first protective door and the second protective door; the water curtain includes a first water curtain set in front of the first protective door and a second water curtain set in front of the second protective door; when the gate valve reaches the first protective door, the first water curtain is opened first, and then the first protective door is removed to allow the gate valve to pass through; when the gate valve moves between the two protective doors, the first protective door is reinstalled and the first water curtain is closed; when the gate valve reaches the second protective door, the second water curtain is opened first, and then the second protective door is removed; after the gate valve passes through, the second protective door is reinstalled and the second water curtain is closed.

[0023] The beneficial effects of the above technical solution are as follows: Two protective gates and two water curtains are installed. When the gate valve reaches the first protective gate, the first water curtain is opened first to form a barrier, and then the first protective gate is removed. This reduces the leakage of asbestos fibers during the gate valve's passage, and even if leakage occurs, it is confined to the enclosed space between the two protective gates. When the gate valve moves between the two protective gates, the first protective gate is reinstalled and the first water curtain is closed. At this point, the gate valve is located within the enclosed space, preventing asbestos fibers from leaking outside the protective cover. When the gate valve reaches the second protective gate, the second water curtain is opened first to form a barrier, and then the second protective gate is removed. This again reduces the leakage of asbestos fibers during the gate valve's passage, providing better protection. After the gate valve passes through the second protective gate, the second protective gate is reinstalled and the second water curtain is closed for reuse.

[0024] To achieve the above objectives, the slurry shield tunneling machine of this invention adopts the following technical solution:

[0025] A slurry shield tunneling machine includes a slurry chamber and a slurry pipe connected to the slurry chamber. A pipe replacement protection device is provided in the replacement area of ​​the slurry pipe. The pipe replacement protection device includes a protective cover that covers the replacement area of ​​the slurry pipe and creates a negative pressure environment. The protective cover includes a cover body with an inlet for external slurry pipes to enter. A transfer chamber is provided inside the cover body at the inlet. The transfer chamber includes a movable plate that can be closed and opened. When the movable plate is closed, the transfer chamber remains closed; when the movable plate is open, the slurry pipe inside the transfer chamber can be removed. A transfer frame is installed at the inlet to receive the slurry pipes outside the cover body and transfer them to the transfer chamber. A drive mechanism is installed on the cover body to move the transfer frame between the outside of the cover body and the transfer chamber. When the transfer frame moves into the transfer chamber, the inlet is sealed, or a sealing plate is additionally installed on the cover body to seal the inlet.

[0026] The beneficial effects of the above technical solution are as follows: The present invention provides a transfer chamber at the inlet within the enclosure. The transfer chamber includes a movable plate that can be closed and opened. A transfer frame is installed at the inlet, and a driving mechanism is installed on the enclosure to move the transfer frame between the outside of the enclosure and the transfer chamber. When the transfer frame moves to the outside of the enclosure, it can receive the external mud pipe. During this process, the movable plate can be closed to keep the transfer chamber sealed, preventing asbestos fibers from leaking out from the inlet. After the transfer frame carrying the mud pipe moves into the transfer chamber, the inlet is sealed by the transfer frame itself or by a sealing plate installed on the enclosure. Then the movable plate is opened, which facilitates the removal of the mud pipe from the transfer frame while preventing asbestos fibers from leaking out from the inlet, achieving a very good protective effect.

[0027] Furthermore, the bottom of the transfer frame is hinged to the cover, and the drive mechanism is a telescopic drive mechanism hinged between the cover and the transfer frame to control the transfer frame's receiving interface to rotate out of the cover or into the transfer cavity.

[0028] The advantages of the above technical solution are as follows: the transfer frame is hinged, and the telescopic drive mechanism is hinged between the cover and the transfer frame. It can control the rotation of the transfer frame so that the receiving interface of the transfer frame can be rotated out to the outside of the cover for easy reception of mud pipes, or rotated into the transfer cavity to realize the entry of mud pipes into the inside of the cover. The overall installation method is simple and easy to control.

[0029] Furthermore, the transfer frame includes two support plates arranged in a V-shape, with one end of the two support plates intersecting and hinged to the cover, and the other end forming the receiving interface.

[0030] The advantages of the above technical solution are: the two V-shaped support plates facilitate the support of the mud pipe and can adapt to mud pipes of different diameters. The structure is simple, easy to process and manufacture, and has strong applicability.

[0031] Furthermore, the hinge position between the transfer frame and the cover is located at the edge of the cover, so that when the transfer frame is rotated into the transfer cavity, the outer support plate just blocks the inlet.

[0032] The advantages of the above technical solution are: the inlet is blocked by the support plate of the transfer frame itself, eliminating the need for a separate sealing plate, and the structure is simple, convenient to process, manufacture and use.

[0033] Furthermore, a vertical plate is fixed to the bottom of the cover, and the movable plate is a cover plate set above the vertical plate. The closed transfer cavity is formed by at least the cover plate, the vertical plate, and the cover.

[0034] The advantages of the above technical solution are: it utilizes the structure of the cover itself, which is simple and convenient for forming a transfer cavity.

[0035] Furthermore, one end of the cover plate is hinged to the inner wall of the enclosure. Inside the enclosure, there is a drive device that is connected to the cover plate to drive the cover plate to rotate upward to open or downward to close. When the cover plate is closed, its edge contacts the vertical plate.

[0036] The advantages of the above technical solution are as follows: the cover plate is hinged and equipped with a driving device, which makes it easy to open and close; when the cover plate is closed, the edge contacts the vertical plate, the structure is simple, and it is easy to form a closed transfer cavity.

[0037] Furthermore, the rear of the protective cover is equipped with a detachable protective door for the passage of the mud pipe and the gate valve on the mud pipe. A water curtain is installed on the front side of the protective door to increase air humidity through spraying, thereby preventing the spread of asbestos fibers.

[0038] The beneficial effects of the above technical solution are as follows: the protective door is detachable, which facilitates the passage of mud pipes and gate valves on the mud pipes after disassembly. At the same time, a water curtain is set on the front side of the protective door, which can increase the air humidity through spraying, thereby preventing the spread of asbestos fibers and achieving a better protective effect.

[0039] Furthermore, the protective door includes a first protective door and a second protective door arranged at an interval, with enclosed spaces formed between the first protective door and the cover, and between the first protective door and the second protective door; the water curtain includes a first water curtain set in front of the first protective door and a second water curtain set in front of the second protective door; when the gate valve reaches the first protective door, the first water curtain is opened first, and then the first protective door is removed to allow the gate valve to pass through; when the gate valve moves between the two protective doors, the first protective door is reinstalled and the first water curtain is closed; when the gate valve reaches the second protective door, the second water curtain is opened first, and then the second protective door is removed; after the gate valve passes through, the second protective door is reinstalled and the second water curtain is closed.

[0040] The beneficial effects of the above technical solution are as follows: Two protective gates and two water curtains are installed. When the gate valve reaches the first protective gate, the first water curtain is opened first to form a barrier, and then the first protective gate is removed. This reduces the leakage of asbestos fibers during the gate valve's passage, and even if leakage occurs, it is confined to the enclosed space between the two protective gates. When the gate valve moves between the two protective gates, the first protective gate is reinstalled and the first water curtain is closed. At this point, the gate valve is located within the enclosed space, preventing asbestos fibers from leaking outside the protective cover. When the gate valve reaches the second protective gate, the second water curtain is opened first to form a barrier, and then the second protective gate is removed. This again reduces the leakage of asbestos fibers during the gate valve's passage, providing better protection. After the gate valve passes through the second protective gate, the second protective gate is reinstalled and the second water curtain is closed for reuse.

[0041] To achieve the above objectives, the construction method of the slurry shield tunneling machine in this invention adopts the following technical solution:

[0042] A construction method for a slurry shield tunneling machine involves the following steps during the installation of slurry pipes in the area covered by a protective cover. When the external slurry pipe is inserted into the cover through an inlet, the pipe is first placed on a transfer frame that has been moved outside the cover. The transfer frame is then moved into a transfer chamber inside the cover. The inlet on the cover is sealed using the transfer frame itself or by using another sealing plate. The transfer chamber remains closed until the movable plate is opened. After the movable plate is opened, the slurry pipe can be removed from the transfer frame.

[0043] The beneficial effects of the above technical solution are as follows: In the construction method of this invention, the mud pipe is first placed on a transfer frame that moves to the outside of the enclosure. Then, the transfer frame is controlled to move into the transfer cavity inside the enclosure. Since the transfer cavity remains closed before the movable plate is opened, asbestos fibers can be prevented from overflowing from the inlet during the process of receiving the external mud pipe and moving into the transfer cavity. After the transfer frame moves into the transfer cavity, the transfer frame itself can seal the inlet on the enclosure or use another sealing plate to seal the inlet. This prevents asbestos fibers from overflowing from the inlet during the process of removing the mud pipe from the transfer frame after the movable plate of the transfer cavity is opened, thus achieving a very good protective effect. Attached Figure Description

[0044] Figure 1 This is a schematic diagram of the protective device for pipe replacement in a slurry shield tunneling machine according to the present invention;

[0045] Figure 2 for Figure 1 A cross-sectional view of the transfer chamber location of the slurry shield tunneling machine pipe replacement protection device (the transfer frame's bearing interface extends out to the outside of the cover);

[0046] Figure 3 for Figure 1 A cross-sectional view of the transfer chamber location of the slurry shield tunneling machine pipe replacement protection device (the transfer frame's receiving interface is rotated into the transfer chamber);

[0047] Figure 4 for Figure 1 A cross-sectional view of the cleaning compartment location of the pipe replacement protection device for the slurry shield tunneling machine shown.

[0048] Figure 5 for Figure 2 Enlarged view of the location of the transfer frame and transfer cavity;

[0049] Figure 6 for Figure 3 Enlarged view of the location of the transfer frame and transfer cavity;

[0050] Figure 7 for Figure 6 The diagram shows the cover plate when it is open.

[0051] In the diagram: 1. Rear trailer; 2. Filter device; 3. Pipeline extension device; 4. Protective cover; 5. Transfer chamber; 5-1. Cover plate; 5-2. Vertical plate; 6. Third water curtain; 7. First water curtain; 8. Second water curtain; 9. Cleaning compartment; 10. Second protective door; 11. First protective door; 12. Gate valve; 13. Sludge collection tank; 14. Pipeline installation crane; 15. Sludge pipe; 16. Pipeline transfer crane; 17. Transfer frame; 17-1. Support plate; 17-2. End plate; 18. Drive cylinder. Detailed Implementation

[0052] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the invention and are not intended to limit the invention; that is, the described embodiments are merely some embodiments of the invention, not all embodiments. The components of the embodiments of the invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0053] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0054] It should be noted that relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any actual relationship or order between these entities or operations. Furthermore, terms such as "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0055] The features and performance of the present invention will be further described in detail below with reference to embodiments.

[0056] An embodiment of the slurry shield tunneling machine pipe replacement protection device (hereinafter referred to as the pipe replacement protection device) of the present invention:

[0057] like Figure 1 As shown, during the construction of the slurry shield tunneling machine, the extension pipes (i.e., slurry pipes) are periodically replaced by the pipe extension device 3 installed on the rear trailer 1. During the continuous installation of the slurry pipes, a small amount of slurry may leak onto the trailer platform because it cannot be completely discharged. Therefore, the pipe replacement protection device of the present invention includes a protective cover 4 that covers the slurry pipe replacement area and forms a negative pressure environment to ensure that the internal asbestos fibers do not overflow into the external environment.

[0058] Specifically, the protective cover 4 includes a cover body, a negative pressure exhaust device connected to the cover body, and a filter device 2 installed on the top of the cover body. The negative pressure exhaust device is used to create a negative pressure environment inside the cover body, and the filter device 2 can filter the inhaled asbestos. A third water curtain 6 and a humidity monitoring device are installed inside the cover body to detect the air humidity inside the cover body. If the humidity is insufficient, the third water curtain 6 can be opened to spray water to ensure sufficient air humidity inside the cover body and prevent the spread of asbestos fibers.

[0059] like Figure 2 and Figure 3 As shown, the overall frame of the rear trailer 1 is door-shaped, thus forming a doorway structure. An inlet for the external mud pipe 15 to enter is provided on the side of the cover near the doorway structure. A transfer chamber 5 is provided inside the cover at the aforementioned inlet. A transfer frame 17 for receiving the mud pipe 15 from outside the cover and transferring the mud pipe 15 into the transfer chamber 5 is also installed at the inlet. A drive mechanism for driving the transfer frame 17 to move between outside the cover and the transfer chamber 5 is installed on the cover.

[0060] Specifically, such as Figure 5 , Figure 6 and Figure 7 As shown, the bottom of the transfer frame 17 is hinged to the cover. The aforementioned drive mechanism is a telescopic drive mechanism hinged between the cover and the transfer frame 17. In this embodiment, the telescopic drive mechanism is a drive cylinder 18, which controls the receiving interface of the transfer frame 17 to rotate out of the cover or into the transfer cavity 5. The transfer frame 17 includes two support plates 17-1 arranged in a V-shape. One end of the two support plates 17-1 intersects and is hinged to the cover, while the other end forms the aforementioned receiving interface. The V-shaped arrangement can accommodate mud pipes of different diameters, making it more versatile. In addition, the transfer frame 17 also includes end plates 17-2 fixed to both ends of the two support plates 17-1. The end plates 17-2 are fan-shaped, with the center of the fan being the hinge center and the radius being the width of the inlet. Therefore, during the rotation of the transfer frame 17, the arc-shaped side of the end plate 17-2 contacts the inner wall of the inlet, which can play a certain guiding role and ensure the smooth rotation of the transfer frame 17.

[0061] The drive cylinder 18 is located inside the housing and hinged to the inner support plate 17-1. Simultaneously, the hinge point between the transfer frame 17 and the housing is located at the edge of the housing, ensuring that when the transfer frame 17 rotates into the transfer cavity 5, the outer support plate 17-1 precisely blocks the aforementioned inlet. Figure 6 and Figure 7 As shown, the length and width of the support plate 17-1 are equal to the length and width of the inlet, respectively.

[0062] like Figures 5-7 As shown, the transfer chamber 5 includes a movable plate that can be closed and opened. The movable plate is a cover plate 5-1. When the cover plate 5-1 is closed, the transfer chamber 5 remains closed. When the cover plate 5-1 is open, the mud pipe inside the transfer chamber 5 can be removed. A vertical plate 5-2 is fixed to the bottom of the cover body. The cover plate 5-1 is located above the vertical plate 5-2. There are three vertical plates 5-2, located at the front, rear, and side respectively. The closed transfer chamber 5 is formed by the cover plate 5-1, the vertical plate 5-2, the transfer frame 17, and the cover body. At the same time, one end of the cover plate 5-1 is hinged to the inner wall of the cover body. A drive device is installed inside the cover body, which is connected to the cover plate 5-1 to drive the cover plate 5-1 to rotate upward to open or downward to close. The drive device can be a lifting chain or a lifting cylinder. When the cover plate 5-1 is closed, its edge contacts the vertical plate 5-2, and the cover plate 5-1 is tilted. That is, the height of the vertical plate 5-2 is less than the width of the inlet. This not only saves space inside the cover, but also allows the transfer frame 17 to smoothly transfer the mud pipe into the transfer chamber 5. At the same time, when the cover plate 5-1 is opened, a larger opening is formed, which makes it easier to remove the mud pipe.

[0063] In addition, such as Figure 1 and Figure 4 As shown, since gate valves 12 need to be installed at regular intervals on the mud pipe 15 for segmentation, a detachable protective door is provided at the rear of the protective cover 4 to allow the mud pipe 15 and the gate valves 12 on the mud pipe 15 to pass through. A water curtain is provided on the front side of the protective door to increase air humidity through spraying, thereby preventing the spread of asbestos fibers. Specifically, the protective door includes a first protective door 11 and a second protective door 10 arranged at intervals. A closed space is formed between the first protective door 11 and the cover, and between the first protective door 11 and the second protective door 10. The water curtain includes a first water curtain 7 provided on the front side of the first protective door 11 and a second water curtain 8 provided on the front side of the second protective door 10.

[0064] In addition, a cleaning compartment 9 is provided on the rear side of the protective cover 4. When the operator completes maintenance work inside the protective cover 4, he / she must leave through the cleaning compartment 9. The cleaning compartment can meet the operator's needs for cleaning and packing dirt, showering, changing clothes and other functions during the process of entering and leaving, ensuring that the operator will not bring asbestos fibers to other working areas of the equipment after leaving.

[0065] The working principle of the pipe replacement protection device in this invention is as follows:

[0066] When performing the splicing and installation of mud pipe 15 in the mud pipe replacement area covered by protective cover 4, during the process of sending the external mud pipe 15 into the cover through the inlet on the cover, such as Figure 2 and Figure 5 As shown, under the control of the drive cylinder 18, the transfer frame 17 rotates out of the housing. The pipeline transfer crane 16 lifts the clean mud pipe 15 stored on the left to the transfer frame 17 on the right. Then, the drive cylinder 18 controls the transfer frame 17 to rotate into the transfer chamber. During this process, the cover plate 5-1 is always closed to keep the transfer chamber sealed and prevent asbestos fibers from overflowing from the inlet.

[0067] like Figure 6 As shown, after the transfer frame 17 is rotated into the transfer cavity, the outer support plate 17-1 just blocks the inlet. Figure 7 As shown, the mud pipe 15 can be removed from the transfer frame 17 by opening the cover plate 5-1 through the drive device. During this process, since the inlet is blocked and the entire mud pipe replacement area is under negative pressure, asbestos fibers can be prevented from overflowing from the inlet, thus providing a very good protective effect. A pipe installation crane 14 is installed inside the enclosure. The mud pipe 15 is removed from the transfer frame 17 by the pipe installation crane 14 and hoisted to the pipe extension area for installation.

[0068] As the tunnel boring machine (TBM) moves in the tunneling direction, the mud pipe 15 and the gate valve 12 installed on the mud pipe 15 move backward relative to the rear trailer 1. When the gate valve 12 reaches the first protective door 11, the first water curtain 7 is opened first to form a barrier, and then the first protective door 11 is removed to allow the gate valve 12 to pass through. During the passage of the gate valve 12, the opened first water curtain 7 can reduce the leakage of asbestos fibers, and even if leakage occurs, it will overflow into the closed space between the two protective doors. As the rear trailer 1 moves forward, when the gate valve 12 moves between the two protective doors, the first protective door 11 is reinstalled and the first water curtain 7 is closed. At this time, the gate valve 12 is located in the closed space, and asbestos fibers will not overflow to the outside of the protective cover 4. When the gate valve 12 reaches the second protective door 10, the second water curtain 8 is opened first to form a barrier, and then the second protective door 10 is removed. In this way, during the passage of the gate valve 12, the opened second water curtain 8 can reduce the leakage of asbestos fibers, achieving a better protective effect. After the gate valve 12 has passed through, reinstall the second protective door 10 and close the second water curtain 8 for reuse. Wastewater generated during the cleaning process can be stored in the sludge collection tank 13 at the bottom of the trailer.

[0069] In other embodiments of the protective device for pipe replacement in slurry shield tunneling machines: only one protective door and one water curtain can be set up, or only one protective door can be set up without a water curtain.

[0070] In other embodiments of the protective device for pipe replacement in slurry shield tunneling machines: the cover plate may not be hinged but rather installed by translation. In this case, a guide structure is provided in the transfer cavity or the cover to guide the translation of the cover plate, and a drive device to control the translation of the cover plate may also be provided.

[0071] In other embodiments of the protective device for pipe replacement in slurry shield tunneling machines: the hinge position between the transfer frame and the cover can be located on the inside of the cover, in which case an additional sealing plate for sealing the inlet can be installed on the cover.

[0072] In other embodiments of the protective device for pipe replacement in slurry shield tunneling machines: when the transfer frame is hinged, the transfer frame may not include the end plates at both ends, but only consist of two support plates arranged in a V-shape, or the transfer frame may not include the two support plates arranged in a V-shape, but other shapes, such as U-shaped support plates or semi-circular support plates. Of course, the transfer frame may also be in the form of a frame.

[0073] In other embodiments of the protective device for pipe replacement in slurry shield tunneling machines: the transfer frame may not be hinged to the cover at the bottom, but may be able to move relative to the cover, for example, it may be directly set at the bottom of the cover and extend out of the cover or retract into the transfer cavity inside the cover through a linear motion. In this case, the transfer frame may be a cuboid box structure or a U-shaped groove structure, or it may be a frame structure.

[0074] In other embodiments of the protective device for pipe replacement in slurry shield tunneling machines: the driving mechanism that drives the transfer frame to move between the outside of the cover and the transfer cavity can also be a cylinder, an electric actuator, or a gear and rack mechanism.

[0075] In other embodiments of the protective device for pipe replacement in slurry shield tunneling machines: regardless of the installation method of the transfer frame, an additional sealing plate that can block the inlet can be installed on the cover, so that the transfer frame itself is no longer used to block the inlet.

[0076] In other embodiments of the protective device for pipe replacement in slurry shield tunneling machines: the transfer cavity may include a bottom plate and various side plates, and is no longer enclosed by the bottom wall of the cover. At the same time, when a sealing plate is installed separately at the inlet of the cover, the transfer cavity is no longer enclosed by the transfer frame.

[0077] In other embodiments of the protective device for pipe replacement in slurry shield tunneling machines: the vertical plate on the side can be used as a movable plate, and a fixed top plate is provided on the top of the transfer cavity.

[0078] An embodiment of the construction method of the slurry shield tunneling machine in this invention is as follows:

[0079] The construction method is the same as the usage process of the slurry shield tunneling machine pipe replacement protection device in the above embodiment. That is, when the slurry pipe is being connected and installed in the area covered by the protective cover, during the process of sending the external slurry pipe into the cover through the inlet on the cover, the slurry pipe is first placed on the transfer frame that is moved to the outside of the cover. Then, the transfer frame is moved to the transfer cavity inside the cover. The inlet on the cover is sealed by the transfer frame itself or by another sealing plate. The transfer cavity is kept closed before the movable plate of the transfer cavity is opened. After the movable plate of the transfer cavity is opened, the slurry pipe on the transfer frame can be removed.

[0080] Because the transfer chamber remains closed before the movable plate is opened, asbestos fibers can be prevented from leaking out of the inlet during the process of receiving external mud pipes and moving into the transfer chamber. Once the transfer frame is inside the transfer chamber, it can seal the inlet on the enclosure or use another sealing plate to do so. This ensures that when the movable plate of the transfer chamber is opened and the mud pipes on the transfer frame are removed, asbestos fibers can be prevented from leaking out of the inlet, providing excellent protection.

[0081] The embodiment of the slurry shield tunneling machine in this invention is as follows: The slurry shield tunneling machine includes a slurry chamber and a slurry pipe connected to the slurry chamber. A pipe replacement protection device is provided in the replacement area of ​​the slurry pipe. The pipe replacement protection device is the same as the pipe replacement protection device of the slurry shield tunneling machine in any of the above embodiments, and will not be repeated here.

[0082] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. The scope of patent protection of the present invention shall be determined by the claims. Similarly, any equivalent structural changes made based on the description and drawings of the present invention shall also be included within the scope of protection of the present invention.

Claims

1. A protective device for replacing mud pipes in a slurry shield tunneling machine, comprising a protective cover (4) for covering the area where the mud pipe (15) is replaced and forming a negative pressure environment, the protective cover (4) comprising a cover body, the cover body having an inlet for the external mud pipe (15) to enter, characterized in that, The housing is provided with a transfer chamber (5) at the inlet. The transfer chamber (5) includes a movable plate that can be closed and opened. When the movable plate is closed, the transfer chamber (5) can be kept closed. When the movable plate is opened, the mud pipe (15) inside the transfer chamber (5) can be removed. The inlet is equipped with a transfer frame (17) for receiving mud pipes (15) from outside the cover and transferring mud pipes (15) to the transfer chamber (5). The cover is equipped with a drive mechanism for driving the transfer frame (17) to move between the outside of the cover and the transfer chamber (5). When the transfer frame (17) moves into the transfer chamber (5), the inlet is blocked or a sealing plate that can block the inlet is installed on the cover.

2. The slurry shield tunneling machine pipe replacement protection device according to claim 1, characterized in that, The bottom of the transfer frame (17) is hinged to the cover. The drive mechanism is a telescopic drive mechanism hinged between the cover and the transfer frame (17) to control the receiving interface of the transfer frame (17) to rotate out to the outside of the cover or into the transfer cavity (5).

3. The slurry shield tunneling machine pipe replacement protection device according to claim 2, characterized in that, The transfer frame (17) includes two support plates (17-1) arranged in a V-shape. One end of the two support plates (17-1) intersects and is hinged to the cover, and the other end forms the receiving interface.

4. The slurry shield tunneling machine pipe replacement protection device according to claim 3, characterized in that, The hinge position of the transfer frame (17) and the cover is located at the edge of the cover so that when the transfer frame (17) is rotated into the transfer cavity (5), the outer support plate (17-1) just blocks the inlet.

5. The slurry shield tunneling machine pipe replacement protection device according to any one of claims 1 to 4, characterized in that, A vertical plate (5-2) is fixed at the bottom of the cover. The movable plate is a cover plate (5-1) set above the vertical plate (5-2). The closed transfer cavity (5) is formed by the cover plate (5-1), the vertical plate (5-2) and the cover together.

6. The slurry shield tunneling machine pipe replacement protection device according to claim 5, characterized in that, One end of the cover plate (5-1) is hinged to the inner wall of the cover. The cover is equipped with a drive device that is connected to the cover plate (5-1) to drive the cover plate (5-1) to rotate upward to open or downward to close. When the cover plate (5-1) is closed, its edge contacts the vertical plate (5-2).

7. The slurry shield tunneling machine pipe replacement protection device according to any one of claims 1 to 4, characterized in that, The rear of the protective cover (4) is provided with a detachable protective door for the mud pipe (15) and the gate valve (12) on the mud pipe (15) to pass through. A water curtain is provided on the front side of the protective door to increase air humidity through spraying and thus prevent the spread of asbestos fibers.

8. The slurry shield tunneling machine pipe replacement protection device according to claim 7, characterized in that, The protective doors include a first protective door (11) and a second protective door (10) arranged at intervals. A closed space is formed between the first protective door (11) and the cover, and between the first protective door (11) and the second protective door (10). The water curtain includes a first water curtain (7) set in front of the first protective door (11) and a second water curtain (8) set in front of the second protective door (10). When the gate valve (12) reaches the first protective door (11), the first water curtain (7) is opened first, and then the first protective door (11) is removed to allow the gate valve (12) to pass through. When the gate valve (12) moves between the two protective doors, the first protective door (11) is reinstalled and the first water curtain (7) is closed. When the gate valve (12) reaches the second protective door (10), the second water curtain (8) is opened first, and then the second protective door (10) is removed. After the gate valve (12) passes through, the second protective door (10) is reinstalled and the second water curtain (8) is closed.

9. A slurry shield tunneling machine, comprising a slurry chamber and a slurry pipe connected to the slurry chamber, wherein a pipe replacement protection device is provided in the replacement area of ​​the slurry pipe, the pipe replacement protection device comprising a protective cover (4) for covering the replacement area of ​​the slurry pipe (15) and forming a negative pressure environment, the protective cover (4) comprising a cover body, the cover body being provided with an inlet for the external slurry pipe (15) to enter, characterized in that, The housing is provided with a transfer chamber (5) at the inlet. The transfer chamber (5) includes a movable plate that can be closed and opened. When the movable plate is closed, the transfer chamber (5) can be kept closed. When the movable plate is opened, the mud pipe (15) inside the transfer chamber (5) can be removed. The inlet is equipped with a transfer frame (17) for receiving mud pipes (15) from outside the cover and transferring mud pipes (15) to the transfer chamber (5). The cover is equipped with a drive mechanism for driving the transfer frame (17) to move between the outside of the cover and the transfer chamber (5). When the transfer frame (17) moves into the transfer chamber (5), the inlet is blocked or a sealing plate that can block the inlet is installed on the cover.

10. The slurry shield tunneling machine according to claim 9, characterized in that, The bottom of the transfer frame (17) is hinged to the cover. The drive mechanism is a telescopic drive mechanism hinged between the cover and the transfer frame (17) to control the receiving interface of the transfer frame (17) to rotate out to the outside of the cover or into the transfer cavity (5).

11. The slurry shield tunneling machine according to claim 10, characterized in that, The transfer frame (17) includes two support plates (17-1) arranged in a V-shape. One end of the two support plates (17-1) intersects and is hinged to the cover, and the other end forms the receiving interface.

12. The slurry shield tunneling machine according to claim 11, characterized in that, The hinge position of the transfer frame (17) and the cover is located at the edge of the cover so that when the transfer frame (17) is rotated into the transfer cavity (5), the outer support plate (17-1) just blocks the inlet.

13. The slurry shield tunneling machine according to any one of claims 9 to 12, characterized in that, A vertical plate (5-2) is fixed at the bottom of the cover. The movable plate is a cover plate (5-1) set above the vertical plate (5-2). The closed transfer cavity (5) is formed by the cover plate (5-1), the vertical plate (5-2) and the cover together.

14. The slurry shield tunneling machine according to claim 13, characterized in that, One end of the cover plate (5-1) is hinged to the inner wall of the cover. The cover is equipped with a drive device that is connected to the cover plate (5-1) to drive the cover plate (5-1) to rotate upward to open or downward to close. When the cover plate (5-1) is closed, its edge contacts the vertical plate (5-2).

15. The slurry shield tunneling machine according to any one of claims 9 to 12, characterized in that, The rear of the protective cover (4) is provided with a detachable protective door for the mud pipe (15) and the gate valve (12) on the mud pipe (15) to pass through. A water curtain is provided on the front side of the protective door to increase air humidity through spraying and thus prevent the spread of asbestos fibers.

16. The slurry shield tunneling machine according to claim 15, characterized in that, The protective doors include a first protective door (11) and a second protective door (10) arranged at intervals. A closed space is formed between the first protective door (11) and the cover, and between the first protective door (11) and the second protective door (10). The water curtain includes a first water curtain (7) set in front of the first protective door (11) and a second water curtain (8) set in front of the second protective door (10). When the gate valve (12) reaches the first protective door (11), the first water curtain (7) is opened first, and then the first protective door (11) is removed to allow the gate valve (12) to pass through. When the gate valve (12) moves between the two protective doors, the first protective door (11) is reinstalled and the first water curtain (7) is closed. When the gate valve (12) reaches the second protective door (10), the second water curtain (8) is opened first, and then the second protective door (10) is removed. After the gate valve (12) passes through, the second protective door (10) is reinstalled and the second water curtain (8) is closed.

17. A construction method for a slurry shield tunneling machine, characterized in that, The slurry shield tunneling machine adopts the slurry shield tunneling machine pipe replacement protection device as described in claim 1. When performing the connection and installation of slurry pipes in the slurry pipe replacement area covered by the protective cover, during the process of sending the external slurry pipe into the cover body through the inlet on the cover body, the slurry pipe is first placed on the transfer frame that is moved to the outside of the cover body. Then, the transfer frame is controlled to move into the transfer cavity inside the cover body. The inlet on the cover body is sealed by the transfer frame itself or by another sealing plate. The transfer cavity is kept closed before the movable plate of the transfer cavity is opened. After the movable plate of the transfer cavity is opened, the slurry pipe on the transfer frame can be removed.

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