Tunnel boring machine protective door and tunnel boring machine

Abstract

The utility model provides a tunnel boring machine protective door and a tunnel boring machine, and belongs to the field of tunnel boring equipment. The protective door of the tunnel boring machine comprises a fixed shielding piece used for cutting off an overhaul channel and an overhaul door, a rail and a driving mechanism are arranged on the fixed shielding piece, and the rail comprises an inclined section so that the fixed shielding piece can be tightly pressed after the overhaul door is closed. The tunnel boring machine comprises the protective door of the tunnel boring machine. The track of the protective door of the tunnel boring machine is provided with the inclined section, the access door can be close to the direction of the fixed shielding piece under the action of the inclined section in the process of moving towards the closing position, and finally the access door is tightly pressed on the fixed shielding piece, so that a gap between the access door and the fixed shielding piece is eliminated, and the service life of the access door is prolonged. And the sealing performance between the access door and the fixed shielding piece is improved.

Description

Technical Field

[0001] The utility model belongs to the field of tunnel boring equipment, in particular to a tunnel boring machine protective door and a tunnel boring machine. Background Art

[0002] The middle of the inclined shaft tunnel boring machine is equipped with an inspection passage for operators to pass through. During the construction process, operators can use the inspection passage to change the cutterhead and other operations. However, when tunneling upward, the slag at the face can easily fall into the drive box through the inspection passage, threatening the safety of the operators.

[0003] To solve the above-mentioned technical problems, the Chinese invention patent application with the existing application publication number CN116556972A and the application publication date of August 8, 2023 discloses a protective device for an inclined shaft tunnel boring machine, the protective device comprising a fixed shielding member fixedly connected to the tunnel boring machine, an inspection port being opened in the center of the fixed shielding member, and an inspection door for closing the inspection port being provided on the fixed shielding member, a track for guiding the inspection door being provided on the fixed shielding member, and a hydraulic cylinder (i.e., a driving mechanism) for pushing and pulling the inspection door being provided on the fixed shielding member, the inspection door being movable along the extension direction of the track driven by the hydraulic cylinder, the two extreme positions of the inspection door stroke being respectively a closed position for closing the inspection port and an open position for opening the inspection port, and the two ends in the extension direction of the track are respectively a closed end and an open end corresponding to the closed position and open position of the inspection door.

[0004] When maintenance is not required, the inspection door can be moved to the closed position under the drive of the hydraulic cylinder to close the inspection port. However, after the inspection door closes the inspection port, the compression force is not maintained between the inspection door and the fixed shielding member, resulting in poor sealing effect. The slag-water mixture can flow into the drive box through the gap between the inspection door and the fixed shielding member, damaging the main drive sealing system. Utility Model Content

[0005] One of the purposes of the utility model is to provide a tunnel boring machine protective door to solve the technical problem in the prior art that the inspection door has a poor sealing effect with a fixed shielding member due to lack of pressing force after the inspection opening is closed.

[0006] Another object of the utility model is to provide a tunnel boring machine to solve the above technical problems.

[0007] In order to achieve the above-mentioned purpose, the technical solution of the tunnel boring machine protective door provided by the utility model is:

[0008] A tunnel boring machine protective door, comprising a fixed shielding member for separating an inspection channel, a maintenance opening being formed on the fixed shielding member, an inspection door being arranged at the inspection opening, a track for guiding the inspection door and a driving mechanism for driving the inspection door to move along an extension direction of the track so as to open or close the inspection opening being arranged on the fixed shielding member, the track comprising an inclined section, the end of the inclined section constituting a closed end corresponding to a closed state of the inspection door, the vertical distance from a portion of the inclined section close to the closed end to the fixed shielding member being smaller than the vertical distance from a portion of the inclined section far from the closed end to the fixed shielding member.

[0009] As a further improvement, the track also includes a straight section connected to the inclined section, the extension direction of the straight section is perpendicular to the through direction of the inspection port, the extension direction of the inclined section is arranged at an angle to the extension direction of the straight section, the end of the inclined section away from the straight section constitutes a closed end, and the end of the straight section away from the inclined section constitutes an open end corresponding to the open state of the inspection door.

[0010] As a further improvement, the length of the straight section is greater than the length of the inclined section.

[0011] As a further improvement, a guide body is fixedly connected to the fixed shielding member on both sides of the inspection door, and a long hole is opened through the guide body, which forms a track. The inspection door includes a door body and guide matching bodies arranged on both sides of the door body. The guide matching bodies extend into the long holes and match with the long hole guides.

[0012] As a further improvement, a notch is provided on the guide body, which is connected to the long hole and is used to install the guide fitting body into the long hole, and a sealing piece for sealing the notch is detachably provided at the notch.

[0013] As a further improvement, the blocking piece includes a blocking portion and two connecting portions arranged on both sides of the blocking portion. The blocking piece is generally T-shaped. The connecting portion is provided with a through hole for the bolt to pass through. Both side walls of the notch are provided with a step structure. The notch is adapted to the shape of the blocking piece. The step structure of the side wall of the notch is provided with a threaded hole for connecting the bolt corresponding to the through hole.

[0014] As a further improvement, the notch is located on an end wall of the guide body away from the fixed shielding member and is arranged close to the open end.

[0015] As a further improvement, at least two long holes are provided on the guide body, and the long holes are arranged at intervals in the through direction of the inspection port. The corresponding side of the door body is provided with guide matching bodies corresponding to the long holes one by one, and the guide matching bodies are arranged at intervals in a direction perpendicular to the through direction of the inspection port, and the guide matching bodies are also arranged at intervals in the through direction of the inspection port.

[0016] As a further improvement, the guide fitting body is a rolling fitting body.

[0017] As a further improvement, a sealing installation groove is provided on one of the inspection door and the fixed shielding member, and a sealing strip is installed in the sealing installation groove to seal with the other one of the inspection door and the fixed shielding member. The inspection door or the fixed shielding member provided with the sealing installation groove is also provided with an injection channel, which is connected to the bottom of the sealing installation groove and is used to inject force transmission medium into the bottom of the sealing installation groove and between the sealing strip.

[0018] As a further improvement, a locking member is provided on one of the inspection door and the fixed shielding member, and a matching structure for cooperating with the locking member to lock the inspection door in a closed state is provided on the other.

[0019] As a further improvement, the locking member includes a locking rod hinged on the inspection door and a locking nut threaded on the locking rod, the mating member is a first ear seat fixed on the fixed shielding member, the locking rod has a locking position and an unlocking position in its rotational stroke, and the locking nut is used to press with the end of the first ear seat away from the inspection door after the locking rod is rotated to the locking position to lock the inspection door in a closed state. When the locking rod is in the unlocking position, the inspection door is in an unlocked state.

[0020] As a further improvement, a second ear seat is fixedly provided on the inspection door, and the locking nut is also used to press fit with the second ear seat after the locking rod is rotated to the unlocking position to fix the locking rod in the unlocking position.

[0021] The beneficial effect is that the tunnel boring machine protection door provided by the utility model is an improvement over the prior art. The track of the tunnel boring machine protection door has an inclined section. When the inspection door moves along the track to the inclined section and closes the inspection port, since the vertical distance from the part of the inclined section close to the closing end to the fixed shielding member is smaller than the vertical distance from the part of the inclined section far from the closing end to the fixed shielding member, the inspection door will approach the fixed shielding member under the action of the inclined section. Finally, after the inspection door completely closes the inspection port, the inspection door can be pressed against the fixed shielding member to eliminate the gap between the inspection door and the fixed shielding member, improve the sealing between the inspection door and the fixed shielding member, and prevent the slag-water mixture from flowing into the drive box through the gap between the inspection door and the fixed shielding member to damage the main drive sealing system.

[0022] To achieve the above-mentioned purpose, the technical solution of the tunnel boring machine provided by the utility model is:

[0023] A tunnel boring machine comprises a shield body and a drive box located inside the shield body, a maintenance passage is provided at the center of the drive box, a tunnel boring machine protective door is provided at the maintenance passage, the tunnel boring machine protective door comprises a fixed shielding member for isolating the maintenance passage, a maintenance opening is provided on the fixed shielding member, a maintenance door is provided at the maintenance opening, a track for guiding the maintenance door and a driving mechanism for driving the maintenance door to move along an extension direction of the track to open or close the maintenance opening are provided on the fixed shielding member, the track comprises an inclined section, the end of the inclined section constitutes a closed end corresponding to a closed state of the maintenance door, and a vertical distance from a portion of the inclined section close to the closed end to the fixed shielding member is smaller than a vertical distance from a portion of the inclined section far from the closed end to the fixed shielding member.

[0024] As a further improvement, the track also includes a straight section connected to the inclined section, the extension direction of the straight section is perpendicular to the through direction of the inspection port, the extension direction of the inclined section is arranged at an angle to the extension direction of the straight section, the end of the inclined section away from the straight section constitutes a closed end, and the end of the straight section away from the inclined section constitutes an open end corresponding to the open state of the inspection door.

[0025] As a further improvement, the length of the straight section is greater than the length of the inclined section.

[0026] As a further improvement, a guide body is fixedly connected to the fixed shielding member on both sides of the inspection door, and a long hole is opened through the guide body, which forms a track. The inspection door includes a door body and guide matching bodies arranged on both sides of the door body. The guide matching bodies extend into the long holes and match with the long hole guides.

[0027] As a further improvement, a notch is provided on the guide body, which is connected to the long hole and is used to install the guide fitting body into the long hole, and a sealing piece for sealing the notch is detachably provided at the notch.

[0028] As a further improvement, the blocking piece includes a blocking portion and two connecting portions arranged on both sides of the blocking portion. The blocking piece is generally T-shaped. The connecting portion is provided with a through hole for the bolt to pass through. Both side walls of the notch are provided with a step structure. The notch is adapted to the shape of the blocking piece. The step structure of the side wall of the notch is provided with a threaded hole for connecting the bolt corresponding to the through hole.

[0029] As a further improvement, the notch is located on an end wall of the guide body away from the fixed shielding member and is arranged close to the open end.

[0030] As a further improvement, at least two long holes are provided on the guide body, and the long holes are arranged at intervals in the through direction of the inspection port. The corresponding side of the door body is provided with guide matching bodies corresponding to the long holes one by one, and the guide matching bodies are arranged at intervals in a direction perpendicular to the through direction of the inspection port, and the guide matching bodies are also arranged at intervals in the through direction of the inspection port.

[0031] As a further improvement, the guide fitting body is a rolling fitting body.

[0032] As a further improvement, a sealing installation groove is provided on one of the inspection door and the fixed shielding member, and a sealing strip is installed in the sealing installation groove to seal with the other one of the inspection door and the fixed shielding member. The inspection door or the fixed shielding member provided with the sealing installation groove is also provided with an injection channel, which is connected to the bottom of the sealing installation groove and is used to inject force transmission medium into the bottom of the sealing installation groove and between the sealing strip.

[0033] As a further improvement, a locking member is provided on one of the inspection door and the fixed shielding member, and a matching structure for cooperating with the locking member to lock the inspection door in a closed state is provided on the other.

[0034] As a further improvement, the locking member includes a locking rod hinged on the inspection door and a locking nut threaded on the locking rod, the mating member is a first ear seat fixed on the fixed shielding member, the locking rod has a locking position and an unlocking position in its rotational stroke, and the locking nut is used to press with the end of the first ear seat away from the inspection door after the locking rod is rotated to the locking position to lock the inspection door in a closed state. When the locking rod is in the unlocking position, the inspection door is in an unlocked state.

[0035] As a further improvement, a second ear seat is fixedly provided on the inspection door, and the locking nut is also used to press fit with the second ear seat after the locking rod is rotated to the unlocking position to fix the locking rod in the unlocking position.

[0036] The beneficial effect is that the tunnel boring machine provided by the utility model is an improvement over the prior art. The track of the tunnel boring machine has an inclined section. When the inspection door moves along the track to the inclined section and closes the inspection port, since the vertical distance from the part of the inclined section close to the closing end to the fixed shielding member is smaller than the vertical distance from the part of the inclined section far from the closing end to the fixed shielding member, the inspection door will approach the fixed shielding member under the action of the inclined section. Finally, after the inspection door completely closes the inspection port, the inspection door can be pressed against the fixed shielding member to eliminate the gap between the inspection door and the fixed shielding member, improve the sealing between the inspection door and the fixed shielding member, and prevent the slag-water mixture from flowing into the drive box through the gap between the inspection door and the fixed shielding member to damage the main drive sealing system. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is a structural schematic diagram of a driving box part of a tunnel boring machine in one embodiment of the tunnel boring machine of the utility model;

[0038] Figure 2 It is a structural schematic diagram of the driving box part of the tunnel boring machine in an embodiment of the tunnel boring machine of the utility model during the process of diagonally upward excavation;

[0039] Figure 3 It is a structural schematic diagram of a tunnel boring machine protective door from a rear view perspective in one embodiment of the tunnel boring machine of the utility model;

[0040] Figure 4 A cross-sectional view of a fixed shielding member in one embodiment of the tunnel boring machine of the utility model;

[0041] Figure 5 It is a rear view structural diagram of the cooperation between the inspection door and the guide body in one embodiment of the tunnel boring machine of the utility model;

[0042] Figure 6 A cross-sectional view of the cooperation between the inspection door and the guide body in one embodiment of the tunnel boring machine of the utility model;

[0043] Figure 7 This is a schematic structural diagram of a blocking member in one embodiment of a tunnel boring machine of the utility model;

[0044] Figure 8 Schematic diagram of the process of the inspection door moving from the open position to the closed position in one embodiment of the tunnel boring machine of the utility model, wherein (a) shows the inspection door in the open position, (b) shows the inspection door moving from the open position to the closed position, and (c) shows the inspection door in the closed position;

[0045] Fig. 9 A partial cross-sectional view of an inspection door and a fixed shielding member in one embodiment of a tunnel boring machine of the utility model;

[0046] Fig.10 A state diagram of an embodiment of a tunnel boring machine of the utility model in which the inspection door is in a closed position;

[0047] Fig.11 It is a schematic diagram of the process of locking the inspection door with a locking rod in one embodiment of the tunnel boring machine of the utility model;

[0048] Fig.12 This is a state diagram of the locking rod when the inspection door is in the open position in one embodiment of the tunnel boring machine of the utility model.

[0049] Description of reference numerals:

[0050] 1. Drive box; 2. Cutter flange; 3. Inspection channel; 4. Fixed shielding piece; 5. Inspection port; 6. Inspection door; 61. Door body; 62. Guide roller; 63. Elastic retaining ring; 7. Driving hydraulic cylinder; 8. Guide body; 9. Long hole; 91. Straight section; 92. Inclined section; 10. Notch; 11. Sealing piece; 111. Connecting part; 112. Sealing part; 12. Connecting bolt; 13. Sealing strip; 14. Elastic pin; 15. Flow groove; 16. Injection hole; 17. Connecting hole; 18. Lock rod; 19. Locking nut; 20. First ear seat; 21. Second ear seat. DETAILED DESCRIPTION

[0051] The present invention is further described in detail below in conjunction with the embodiments.

[0052] In order to solve the problems in the prior art, the basic concept of the utility model is to use a track for guiding the inspection door with an inclined section. In the process of the inspection door moving toward the closed position, it will approach the direction of the fixed shielding member under the action of the inclined section, and finally be pressed against the fixed shielding member to eliminate the gap between the inspection door and the fixed shielding member, thereby improving the sealing between the inspection door and the fixed shielding member.

[0053] Specific embodiment 1 of the tunnel boring machine provided by the utility model:

[0054] A tunnel boring machine comprises a shield body, a cutter head at the front end of the shield body, and a drive box 1 located in the shield body, see attached Figure 1 and attached Figure 2 An inspection passage 3 is provided at the center of the driving box 1, and a tunnel boring machine protection door is provided at the inspection passage 3.

[0055] The tunnel boring machine protective door includes a plate-shaped fixed shielding member 4, a cutterhead flange 2 is provided at the front end of the drive box 1, and the edge of the fixed shielding member 4 is fixedly connected to the cutterhead flange 2, thereby separating the inspection channel 3. In order to facilitate the operator to pass through the inspection channel 3, an inspection port 5 is opened on the fixed shielding member 4 along the front and rear direction of the tunnel boring machine.

[0056] See attached Figure 2 , during the tunnel boring machine's upward excavation, the slag ( Figure 2 The ball-shaped shadow part in the middle) can easily fall into the drive box 1 from the inspection port 5, so an inspection door 6 is provided at the inspection port 5, and a track for guiding the inspection door 6 and a driving mechanism for driving the inspection door 6 to move along the extension direction of the track are provided on the side of the fixed shielding member 4 away from the cutter disc. The inspection door 6 has a closed position for closing the inspection port 5 and an open position for opening the inspection port 5, and the closed position and the open position are respectively located at the two extreme positions of the movement of the inspection door 6.

[0057] The driving mechanism includes a driving hydraulic cylinder 7, a hydraulic pipeline connected to the driving hydraulic cylinder 7, and a control valve. The cylinder body of the driving hydraulic cylinder 7 is hinged to the fixed shielding member 4, and the piston rod of the driving hydraulic cylinder 7 is hinged to the inspection door 6. The driving hydraulic cylinder 7 drives the inspection door 6 to move by telescoping. Before construction, the driving hydraulic cylinder 7 is in an extended state, and the inspection door 6 is in a closed position. The operator closes the control valve to maintain the pressure in the driving hydraulic cylinder 7, and then removes the hydraulic pipeline to facilitate the driving hydraulic cylinder 7 to rotate with the driving box 1 in the shield body.

[0058] See attached Figure 3 The fixed shielding member 4 is fixedly connected to one side away from the cutter disc with two guide bodies 8, the two guide bodies 8 are long plate-like structures, and the two guide bodies 8 are parallel to each other, the two guide bodies 8 are respectively located on both sides of the inspection door 6, and the arrangement direction of the two guide bodies 8 is perpendicular to the moving direction of the inspection door 6. Figure 4 The guide body 8 and the fixed shielding member 4 can be positioned by an elastic pin 14, and in other embodiments, they can also be fixedly connected by welding.

[0059] See attached Figure 4 Combined with the attached Figure 3 The guide body 8 is provided with a long hole 9 along its arrangement direction, and each guide body 8 is provided with two long holes 9. The inspection door 6 includes a door body 61, and two guide matching bodies are provided on both sides of the door body 61. The guide matching bodies extend into the corresponding long holes 9 and are guided and matched with the long holes 9. Therefore, the long holes 9 in this embodiment constitute a track.

[0060] See attached Figure 5 and attached Figure 6 Specifically, the guide matching body is a guide roller 62. Four ear seats are provided on the side of the door body 61 away from the fixed shielding member 4. Each ear seat is provided with a mounting hole for the corresponding guide roller 62 to pass through. The guide roller 62 has a large diameter section and a small diameter section, wherein the large diameter section matches with the corresponding long hole 9, and the small diameter section penetrates into the mounting hole on the corresponding ear seat. A shaft shoulder is formed between the large diameter section and the small diameter section, and the shaft shoulder forms a stop fit with the ear seat. After the end of the small diameter section away from the large diameter section passes through the mounting hole, an elastic retaining ring 63 is installed to limit the position, so as to prevent the guide roller 62 from being separated from the ear seat. The guide roller 62 rotates with the ear seat and rolls with the inner wall of the long hole 9, which can effectively reduce the friction force of the inspection door 6 during the movement along the track.

[0061] During the movement of the guide fitting body in the long hole 9, it can reach the two ends of the long hole 9. When the guide fitting body is at the two ends of the long hole 9, the inspection door 6 is respectively located in the closed position and the open position. Therefore, the two ends of the long hole 9 are the closed end and the open end, respectively, wherein the closed end corresponds to the closed position, and the open end corresponds to the open position. When the driving hydraulic cylinder 7 is extended, the inspection door 6 is located in the closed position, and the guide fitting body is located at the closed end of the long hole 9.

[0062] In this embodiment, the track, i.e., the long hole 9, is divided into a straight section 91 and an inclined section 92. The side of the fixed shielding member 4 away from the cutter disc is a plane, and the extension direction of the straight section 91 is parallel to the plane, that is, the extension direction of the straight section 91 is perpendicular to the through direction of the inspection port 5. The end of the straight section 91 away from the inclined section 92 is an open end, and the extension direction of the inclined section 92 is arranged at an angle to the extension direction of the straight section 91. The end of the inclined section 92 away from the straight section 91 is a closed end and is close to the fixed shielding member 4.

[0063] When the inspection door 6 is in the closed position, the inclined section 92 exerts a squeezing force on the guide fitting toward the fixed shielding member 4, so that the inspection door 6 and the fixed shielding member 4 are closely attached and sufficient pressure is maintained under the action of the driving hydraulic cylinder 7, thereby enhancing the sealing between the inspection door 6 and the fixed shielding member 4. In the travel portion of the inspection door 6 corresponding to the straight section 91, the inspection door 6 is away from the fixed shielding member 4, so that there is no friction with the fixed shielding member 4, thereby improving the smoothness of the inspection door 6 during movement.

[0064] The length of the inclined section 92 is shorter than that of the straight section 91, so that when the inspection door 6 moves between the closed position and the open position, most of the travel can correspond to the straight section 91, further improving the smoothness of movement. In addition, the connection between the straight section 91 and the inclined section 92 has a smooth transition, so that the movement process of the inspection door 6 is relatively smooth. The inclined section 92 can be a straight structure or an arc structure.

[0065] See attached Figure 4 In order to facilitate the installation of the guide fitting body into the corresponding long hole 9, a notch 10 connecting the end wall of the guide body 8 away from the fixed shielding member 4 and the corresponding long hole 9 is provided. After the guide fitting body is assembled to the door body 61, the guide fitting body can be installed into the corresponding long hole 9 through the notch 10, which is convenient for the overall assembly of the inspection door 6.

[0066] Combined with Figure 6The notch 10 is provided with a detachable plugging member 11, so that after the guide fitting body is inserted into the long hole 9, the notch 10 can be plugged with the plugging member 11 to prevent the guide fitting body from slipping out of the notch 10 during use. The notch 10 is provided near the open end of the long hole 9 to ensure that the inner wall at the closed end of the long hole 9 has sufficient strength to apply a squeezing force to the guide fitting body. In other embodiments, if the plugging member 11 is strong enough, the notch 10 can also be provided in the middle of the long hole 9 or near the closed end.

[0067] See attached Figure 6 and attached Figure 7 The plugging member 11 includes a plugging portion 112 and two connecting portions 111 arranged on both sides of the plugging portion 112, so that the plugging member 11 is in a T-shaped structure as a whole, and the connecting portion 111 is provided with a through hole for the connecting bolt 12 to pass through. Both side walls of the notch 10 are provided with a step structure so that the notch 10 is adapted to the shape of the plugging member 11, and the step structure of the side wall of the notch 10 is provided with a threaded hole corresponding to the through hole for matching with the connecting bolt 12. After the plugging member 11 is inserted into the notch 10, one end wall of the plugging portion 112 is aligned with the inner wall of the long hole 9, and the other end wall of the plugging portion 112 is aligned with the end wall of the guide body 8 away from the fixed shielding member 4, and then the connecting bolt 12 is passed through the through hole and threadedly matched with the corresponding threaded hole, so that the plugging member 11 can be fixedly connected to the guide body 8.

[0068] When the stroke of the inspection door 6 is short, the vertical distances from the straight sections 91 of the two long holes 9 opened on the same guide body 8 to the fixed shielding member 4 can be equal. However, when the stroke of the inspection door 6 is long, the two long holes 9 opened on the same guide body 8 need to be staggered, specifically, the vertical distance from the straight section 91 of the long hole 9 close to the driving hydraulic cylinder 7 to the fixed shielding member 4 is smaller than the vertical distance from the straight section 91 of the long hole 9 far from the driving hydraulic cylinder 7 to the fixed shielding member 4, so that the two long holes 9 are spaced apart in the thickness direction of the door body 61 to ensure that the two long holes 9 do not affect each other.

[0069] In order to adapt to the arrangement of the long hole 9, the two guide fittings on the same side of the door body 61 are also arranged at intervals in the thickness direction of the door body 61 (i.e., the through direction of the inspection port 5). At the same time, the two guide fittings are arranged at intervals in the moving direction of the door body 61 to ensure that the door body 61 is subjected to balanced force.

[0070] When the tunnel boring machine stops excavating and the operator needs to reach the cutterhead for maintenance, the hydraulic cylinder 7 is driven to retract, so that the maintenance door 6 reaches the open position. Figure 8 In part (a), the inspection opening 5 is fully opened, and the operator can enter the cutter head position through the inspection opening 5.

[0071] See also Figure 8In part (b), after the inspection is completed, the hydraulic cylinder 7 is driven to extend, so that the inspection door 6 moves from the open position to the closed position. When the guide fitting body reaches the inclined section 92, the inspection door 6 starts to move toward the closed position while being squeezed by the inclined section 92 and moving toward the fixed shielding member 4. Figure 8 In part (c), when the inspection door 6 finally reaches the closed position, the inspection door 6 is completely pressed against the fixed shielding member 4 and maintains sufficient pressure with the fixed shielding member 4 under the action of the driving hydraulic cylinder 7 to improve the sealing between the inspection door 6 and the fixed shielding member 4, thereby preventing the slag-water mixture at the tunnel face from infiltrating into the drive box 1 through the gap between the inspection door 6 and the fixed shielding member 4.

[0072] In order to further improve the sealing effect, a sealing strip surrounding the inspection opening 5 may be provided on the fixed shielding member 4, and the sealing strip is specifically a sealing rubber strip 13. When the inspection door 6 reaches the closed position, the sealing rubber strip 13 will be squeezed and elastically deformed to eliminate the gap between the sealing rubber strip 13 and the inspection door 6. In other embodiments, the sealing rubber strip 13 may also be installed on the inspection door 6.

[0073] In the above embodiments, the guide fitting body is a guide roller. In other embodiments, the guide fitting body may also include a roller rotatably arranged on the guide roller through a bearing. In this embodiment, the diameter of the roller is equal to the width of the long hole, which can further improve the smoothness of the movement of the inspection door.

[0074] In the above embodiments, the guide fitting body rotates with the door body and rolls with the inner wall of the long hole in order to reduce the resistance during the movement of the inspection door. In other embodiments, the guide fitting body can also be fixedly connected to the door body, in which case the guide fitting body needs to slide with the inner wall of the long hole. In this embodiment, the guide fitting body can be a guide cylinder fixedly connected to the door body, or a non-cylindrical guide slider. When the guide fitting body is a guide slider, it is necessary to have a sufficient gap between the guide slider and the long hole so as to smoothly reach the inclined section from the straight section.

[0075] In the above embodiments, two guide mates are arranged on the same side of the door body in order to make the force of the entire inspection door more balanced. In other embodiments, three or four guide mates can be arranged on the same side of the door body to make the force of the inspection door more balanced. If the size of the door body is small, only one guide mate can be arranged on the same side of the door body. When the number of guide mates increases, the number of slots also increases accordingly.

[0076] In the above embodiments, the shapes of the notch and the plugging piece are both T-shaped, which can facilitate the installation of the plugging piece, and at the same time, the plugging piece can be completely embedded in the notch to prevent the plugging piece from protruding from the guide body. In other embodiments, the notch can also be a rectangular structure. In this embodiment, only the plugging part of the plugging piece is inserted into the notch, and the connecting part overlaps the end wall of the guide body away from the fixed shielding piece, and a threaded hole corresponding to the through hole is opened on the end wall to facilitate the connection of the plugging piece by bolt connection. In other embodiments, the blocking piece may also be in the shape of a rectangular parallelepiped, and the shape of the notch may be adapted to the blocking piece. After the blocking piece is inserted into the notch, the two end walls of the blocking piece may be aligned with the inner wall of the long hole and the end wall of the guide body away from the fixed shielding piece, respectively. In order to fix the blocking piece in the notch, a connecting hole may be opened at the position where the blocking piece meets the inner wall of the notch. Half of the inner wall of the connecting hole may be located on the blocking piece, and the other half of the inner wall may be located on the guide body. After inserting a bolt into the connecting hole and equipping the bolt with a nut, the blocking piece may be prevented from falling out of the notch.

[0077] In the above embodiments, the notch is provided to facilitate the overall assembly of the inspection door. In other embodiments, the notch may not be provided. In this embodiment, the door body is first hoisted between the two guide bodies, and the through-holes on the ear seat are located at the corresponding long holes. Then, the guide roller is passed from the outside of the guide body through the long holes and then through the through-holes on the ear seat. Finally, the elastic retaining ring is installed on the guide roller to complete the assembly of the inspection door.

[0078] In the above embodiments, a long hole is provided on the guide body and the long hole is used as a track, which can reduce the difficulty of processing the track. In other embodiments, a long groove can be provided only on one side of the guide body close to the inspection door, and the long groove can be used as a track. In this embodiment, the guide matching body extends into the long groove and cooperates with the long groove guide. In other embodiments, the guide body can be omitted, but guide rails can be provided on both sides of the inspection door. The cross-section of the guide rail is a dovetail structure, and the guide rail also has a straight section and an inclined section, which will not be described in detail here. In this embodiment, the ear seat of the door body protrudes from the door body in the direction close to the guide rail, and a dovetail groove that cooperates with the guide rail is provided on the ear seat. The guide rail can guide the inspection door and apply a squeezing force to the inspection door when the inspection door reaches the closed position so that the inspection door is tightly attached to the fixed shielding member. In this embodiment, there also needs to be enough matching clearance between the dovetail groove and the guide rail to ensure that the ear seat can smoothly reach the inclined section from the straight section.

[0079] In the above embodiments, the length of the straight section is greater than that of the inclined section, so that most of the travel of the inspection door corresponds to the straight section, thereby improving the smoothness of the movement of the inspection door. In other embodiments, the length of the straight section and the inclined section may be equal or the length of the straight section may be less than that of the inclined section. In other embodiments, the straight section may not be provided, so that the portion between the closed end and the open end of the long hole is entirely the inclined section.

[0080] Specific embodiment 2 of the tunnel boring machine provided by the utility model:

[0081] This embodiment is improved on the basis of embodiment 1. Fig. 9 The fixed shielding member 4 is provided with a sealing installation groove around the inspection opening 5, and the sealing strip 13 is embedded in the sealing installation groove. The fixed shielding member 4 is also provided with an injection channel for injecting a force transmission medium between the bottom of the sealing installation groove and the sealing strip 13. The force transmission medium is a fluid, which can be clean water or hydraulic oil.

[0082] The injection channel includes a flow groove 15, an injection hole 16 and a connecting hole 17. The flow groove 15 is located at the bottom of the sealing installation groove and can increase the flow effect of the force transmission medium. After the flow groove 15 is processed, the injection hole 16 is processed. The injection hole 16 is located on the outside of the sealing strip 13. The injection hole 16 penetrates the fixed shielding member 4 along the thickness direction. After the injection hole 16 is processed, a hole is drilled from the side wall of the inspection port 5 in the direction of the injection hole 16 and the injection hole 16 and the flow groove 15 are connected to process the connecting hole 17. The extension direction of the connecting hole 17 is perpendicular to the thickness direction of the fixed shielding member 4. After the injection hole 16 and the connecting hole 17 are processed, the injection hole 16 is blocked at one end of the cutter head, and the connecting hole 17 is blocked at one end of the inspection port 5 to finally form the injection channel. In other embodiments, the flow groove 15 may not be processed, and the connecting hole 17 may be directly connected to the sealing installation groove.

[0083] A one-way valve is threadedly installed at one end of the injection hole 16 away from the cutter disc. After the inspection door 6 is closed, the one-way valve is connected to the oil filling pipeline and injects hydraulic oil into the injection channel, so that the side of the sealing strip 13 away from the inspection door 6 is subjected to pressure, so that the sealing strip 13 is tightly attached to the inspection door, further improving the sealing between the inspection door 6 and the fixed shielding member 4.

[0084] In other embodiments, the sealing installation groove may also be provided on the inspection door 6, and the injection channel may also be correspondingly provided on the inspection door 6, which will not be elaborated herein.

[0085] Specific embodiment 3 of the tunnel boring machine provided by the utility model:

[0086] This embodiment is improved on the basis of embodiment 1. Figure 3 and attached Fig.10 At least one locking piece is provided on the side of the door body 61 of the inspection door 6 away from the cutter disc, and a matching structure that cooperates with the locking piece is provided on the fixed shielding member 4. When the inspection door 6 is in the closed position, the locking piece cooperates with the matching structure to lock the inspection door 6 to prevent the inspection door 6 from sliding open after the hydraulic cylinder 7 accidentally releases pressure while the fixed shielding member 4 rotates during excavation.

[0087] In this embodiment, the locking member is a locking rod 18 hinged to the inspection door 6. Two locking rods 18 are provided. The ends of the locking rods 18 are formed with external threads and connected with locking nuts 19. The matching structure is a U-shaped first ear seat 20 fixedly arranged on the fixed shielding member 4. When the inspection door 6 is in the closed position, see the attached Fig.11 , rotate the locking rod 18 so that the locking rod 18 is embedded in the first ear seat 20, and at the same time, the locking nut 19 is located on the side of the first ear seat 20 away from the inspection door 6, and then tighten the locking nut 19 so that the locking nut 19 and the end of the first ear seat 20 away from the inspection door 6 are pressed together, so that the inspection door 6 can be manually locked.

[0088] The inspection door 6 is also fixedly provided with a U-shaped second ear seat 21, which is located on the side of the lock rod 18 away from the first ear seat 20. When the inspection door 6 is not in the closed position, see the attached Fig.12 , rotate the locking rod 18 and embed it into the second ear seat 21, and at the same time make the locking nut 19 located on the side of the second ear seat 21 away from the first ear seat 20, and then tighten the locking nut 19 to make the locking nut 19 and the end of the second ear seat 21 away from the first ear seat 20 press fit, so that the locking rod 18 can be fixed to prevent the locking rod 18 from shaking when the inspection door 6 is in the open position or hindering the maintenance personnel from passing through the inspection port 5.

[0089] The locking rod 18 has a locking position and an unlocking position in its rotation stroke. When the locking rod 18 is embedded in the first ear seat 20, the locking rod 18 is in the locking position. After the locking nut 19 is loosened to release the press fit with the first ear seat 20, the locking rod 18 is rotated to leave the locking position, and the locking rod 18 is in the unlocking position. When the locking nut 19 is press fit with the second ear seat 21, the locking rod 18 is fixed in the unlocking position.

[0090] In other embodiments, the second ear seat 21 may not be provided.

[0091] In other embodiments, the arrangement positions of the locking rod 18 and the first ear seat 20 may be interchanged. In this embodiment, the second ear seat 21 is also correspondingly arranged on the fixed shielding member 4 .

[0092] In other embodiments, the locking member and the matching structure may have other forms. For example, the locking member and the matching structure may be the movable part and the fixed part of the lock respectively. The lock is a prior art and will not be described in detail here.

[0093] The specific embodiment of the tunnel boring machine protective door provided by the utility model is as follows:

[0094] The tunnel boring machine protective door is the tunnel boring machine protective door in any one of the specific embodiments 1-3 of the above-mentioned tunnel boring machine, and will not be described in detail here.

[0095] Finally, it should be noted that the above is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments without creative work, or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A tunnel boring machine protective door, comprising a fixed shielding member for isolating an inspection passage, a maintenance opening being provided on the fixed shielding member, a maintenance door being provided at the maintenance opening, a track for guiding the maintenance door being provided on the fixed shielding member, and a driving mechanism for driving the maintenance door to move along the extension direction of the track so as to open or close the maintenance opening, wherein: The track includes an inclined section, the end of which constitutes a closed end corresponding to the closed state of the inspection door, and the vertical distance from the part of the inclined section close to the closed end to the fixed shielding member is smaller than the vertical distance from the part of the inclined section far from the closed end to the fixed shielding member.

2. The tunnel boring machine protective door according to claim 1, characterized in that: The track also includes a straight section connected to the inclined section. The extension direction of the straight section is perpendicular to the through direction of the inspection port. The extension direction of the inclined section is arranged at an angle to the extension direction of the straight section. The end of the inclined section away from the straight section constitutes a closed end, and the end of the straight section away from the inclined section constitutes an open end corresponding to the open state of the inspection door.

3. The tunnel boring machine protective door according to claim 2, characterized in that: The length of the straight section is greater than the length of the inclined section.

4. The tunnel boring machine protective door according to any one of claims 1 to 3, characterized in that: A guide body is fixedly connected to the fixed shielding member on both sides of the inspection door. A long hole is penetrated through the guide body to form a track. The inspection door includes a door body and guide matching bodies arranged on both sides of the door body. The guide matching bodies extend into the long holes and match with the long hole guides.

5. The tunnel boring machine protective door according to claim 4, characterized in that: The guide body is provided with a notch which is communicated with the long hole and is used for installing the guide matching body into the long hole. A blocking piece for blocking the notch is detachably arranged at the notch.

6. The tunnel boring machine protective door according to claim 5, characterized in that: The sealing piece includes a sealing portion and two connecting portions arranged on both sides of the sealing portion. The sealing piece is generally in a T-shaped structure. The connecting portion is provided with a through hole for the bolt to pass through. Both side walls of the notch are provided with a step structure. The notch is adapted to the shape of the sealing piece. The step structure of the side wall of the notch is provided with a threaded hole for connecting the bolt corresponding to the through hole.

7. The tunnel boring machine protective door according to claim 5, characterized in that: The notch is located on an end wall of the guide body away from the fixed shielding member and is arranged close to the open end.

8. The tunnel boring machine protective door according to claim 4, characterized in that: At least two long holes are arranged on the guide body, and the long holes are arranged at intervals in the through direction of the inspection port. The corresponding side of the door body is provided with guide matching bodies corresponding to the long holes one by one, and the guide matching bodies are arranged at intervals in a direction perpendicular to the through direction of the inspection port, and the guide matching bodies are also arranged at intervals in the through direction of the inspection port.

9. The tunnel boring machine protective door according to claim 4, characterized in that: The guide fitting body is a rolling fitting body.

10. The tunnel boring machine protective door according to any one of claims 1 to 3, characterized in that: A sealing installation groove is provided on one of the inspection door and the fixed shielding member, and a sealing strip is installed in the sealing installation groove to seal with the other one of the inspection door and the fixed shielding member. The inspection door or the fixed shielding member provided with the sealing installation groove is also provided with an injection channel, which is connected to the bottom of the sealing installation groove and is used to inject force transmission medium into the gap between the bottom of the sealing installation groove and the sealing strip.

11. The tunnel boring machine protective door according to any one of claims 1 to 3, characterized in that: A locking piece is provided on one of the inspection door and the fixed shielding piece, and a matching structure for matching with the locking piece to lock the inspection door in a closed state is provided on the other.

12. The tunnel boring machine protective door according to claim 11, characterized in that: The locking member includes a locking rod hinged on the inspection door and a locking nut threaded on the locking rod, the matching member is a first ear seat fixed on the fixed shielding member, the locking rod has a locking position and an unlocking position in its rotation stroke, and the locking nut is used to press and cooperate with the end of the first ear seat away from the inspection door after the locking rod is rotated to the locking position to lock the inspection door in a closed state. When the locking rod is in the unlocking position, the inspection door is in an unlocked state.

13. The tunnel boring machine protective door according to claim 12, characterized in that: A second ear seat is fixedly arranged on the inspection door, and the locking nut is also used to press and fit with the second ear seat after the locking rod is rotated to the unlocking position to fix the locking rod in the unlocking position.

14. A tunnel boring machine, comprising a shield body and a drive box located in the shield body, wherein a maintenance passage is provided in the center of the drive box, wherein: A tunnel boring machine protective door as described in any one of claims 1 to 13 is provided at the maintenance passage.

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