Lane air door

Abstract

The present invention discloses a tunnel damper, which comprises: a door frame, a pressure-avoiding space is left between the door frame and the tunnel wall on which it is installed, and a plurality of hanging hole groups are distributed on the side of the door frame opposite to the tunnel wall; an anchoring device, anchored at a position on the tunnel wall aligned with the hanging hole group, and a pull rod aligned with the hanging holes in the hanging hole group is provided at one end of the anchoring device facing the hanging hole group, and the pull rod is locked by reverse constraint after passing through the hanging hole and is in a state of hanging the door frame; and the pull rod has a degree of freedom in the direction of passing through the hanging hole from the anchoring device side, or a positive constraint is formed by a component or structure of given strength; a closing component blocks the pressure-avoiding space in the tunnel direction; and a door leaf is installed on the door frame. The tunnel damper based on the present invention can effectively reduce the impact on the opening and closing of the damper when the deformation of the tunnel is within a preset range.

Description

Technical Field

[0001] The invention relates to a tunnel air door. Background Art

[0002] At present, in the process of mining in the thousand-meter deep well thick coal seam in my country, due to the soft coal seam quality, high ground stress, frequent faults during tunnel excavation, relatively developed groundwater, and the existing support and adjustment, the roadway often has roof separation and large deformation, and the coal rock is seriously broken and deformed. This causes the existing ventilation facilities to be seriously stressed, the walls to crack, the air doors to deform, and they are not closed tightly or cannot be closed automatically, and the maintenance workload is very heavy.

[0003] The damper is an important structure in the mine ventilation system. It is used to block the wind flow, create conditions for the distribution of mine wind flow on demand, and provide convenience for pedestrians and transportation. It is one of the most important components to ensure ventilation safety underground; it is used to block the wind flow in the tunnel or limit the wind volume passing through the tunnel, ensure the wind volume requirements of the places where wind is needed, and enable people and vehicles to pass through.

[0004] At present, conventional dampers are installed in tunnels as frame connections, and most of the outer frames are hard connections. When installed in high-ground pressure tunnels, the tunnel will deform greatly, and the deformation of the tunnel will compress the outer frame of the damper. The deformation of the outer frame under pressure will cause the door structure to deform, resulting in the damper being unable to open normally. In case of emergency, people in the tunnel will not be able to open the damper and evacuate in time, which will cause serious consequences.

[0005] Chinese patent document CN202745913U discloses a pressure-resistant damper in a coal mine. In order to reduce the impact of tunnel deformation on the damper, a buffer space is left between the tunnel wall and the arch and the surrounding wall of the damper. The buffer space is filled with a buffer. When the tunnel wall is deformed, the distance between the tunnel wall and the damper frame changes, and the buffer with relatively buffering capacity is compressed, so that the pressure directly acting on the damper frame is relatively small. However, the buffer can only produce buffering, and the damper frame still needs to bear a relatively large force, which will inevitably cause the damper frame to deform and affect the opening of the damper.

[0006] Chinese patent document CN209483414U discloses a retractable damper, which has a space between the damper door frame formed by the door beam and the frame and the lane wall, and a telescopic member is arranged in the space, the telescopic member is perpendicular to the damper door frame, one end of the telescopic member is fixedly connected to the damper door frame, and the other end is fixedly connected to the lane wall. The telescopic member relies on the elasticity of the elastic component contained therein to achieve telescoping, and the elastic force of the elastic component is proportional to its compression amount. In other words, as the deformation of the lane increases, the force of the elastic component acting on the damper door frame will gradually increase. The damper door frame will inevitably deform, which will affect the opening of the damper.

[0007] Similarly, Chinese patent document CN206299399U also adopts elastic components for buffering. The inventor believes that buffering can only alleviate the effect of rigidity, but cannot eliminate the influence of the deformation of the lane within a certain limit on the opening of the damper. In particular, the installation of the damper using only buffer components cannot produce relatively accurate positioning, and the installation reliability is relatively poor. Summary of the invention

[0008] Different from the known tunnel damper that solves the influence of tunnel deformation on the damper by buffering, the purpose of the present invention is to provide a tunnel damper that can effectively reduce the influence on the opening and closing of the damper when the tunnel deformation is within a preset range.

[0009] In an embodiment of the present invention, a tunnel air door is provided, which includes:

[0010] A clearance space is left between the door frame and the tunnel wall on which it is installed, and a plurality of hanging hole groups are distributed on the side of the door frame opposite to the tunnel wall;

[0011] An anchoring device is anchored on the tunnel wall at a position aligned with the lifting hole group. The end of the anchoring device facing the lifting hole group is provided with a pull rod aligned with the lifting holes in the lifting hole group. After the pull rod passes through the lifting hole, it is locked by reverse constraint and is in a state of lifting the door frame; and the pull rod is left with a degree of freedom in the direction of passing through the lifting hole from the anchoring device side or is positively constrained by a component or structure of given strength;

[0012] The closing component blocks the avoidance space in the direction of the lane;

[0013] The door leaf is mounted on the door frame.

[0014] Optionally, a limiting device for limiting the front and rear sides of the door frame is provided on the tunnel wall.

[0015] Optionally, the limiting device comprises a base plate anchored on the tunnel wall and two clamping plates mounted on or integral with the base plate;

[0016] The door frame is correspondingly clamped between the two clamping plates and is limited in front and back directions.

[0017] Optionally, there are two groups of limit devices, and the two groups of limit devices are symmetrical about the left and right symmetric planes of the tunnel damper.

[0018] Optionally, the closer the anchor pulling devices are to the top of the tunnel, the greater the distribution density.

[0019] Optionally, the anchor pulling device comprises:

[0020] Anchors, embedded or installed in the tunnel wall;

[0021] a fixing plate connected to the anchor;

[0022] The pull rod is installed on the fixed plate.

[0023] Optionally, the pull rod includes a screw segment, and the reverse constraint is a fastening nut cooperating with the screw segment.

[0024] Optionally, a lock nut is provided for the fastening nut.

[0025] Optionally, the closing component is configured as:

[0026] In the first method, a blocking piece is provided at one or both ends of the avoidance space in the direction of the laneway;

[0027] In the second method, the avoidance space is filled with a closed medium;

[0028] In a third manner, the avoidance space is filled with a closed medium, and a blocking piece is provided at one or both ends of the avoidance space in the direction of the laneway.

[0029] Optionally, the blocking piece is arranged on the high-pressure side of the tunnel damper and is fixed on one side, and the fixed side is the side where the tunnel wall is located;

[0030] The sealing medium is a foamed material filler.

[0031] Optionally, the blocking piece is a rubber sealing piece;

[0032] A shielding sheet which is softer than the rubber sealing sheet is also arranged on the outer side of the rubber sealing sheet.

[0033] Optionally, the door leaf has two parts, and the door leaf is mounted on the door frame via a door axis.

[0034] Optionally, the two door leaves are opened by a drive device.

[0035] Optionally, the driving device comprises:

[0036] A crank arm is installed on the corresponding door leaf;

[0037] A connecting rod, one end of which is hinged to one crank arm, and the other end of which is hinged to the other crank arm;

[0038] The actuator mechanism has an actuating end hinged with a crank arm, and uses the crank arm as a force arm to drive the door leaf to rotate around the door axis.

[0039] Optionally, the actuator is a hydraulic cylinder or a pneumatic cylinder.

[0040] Optionally, the door frame comprises an inner frame and an outer frame, wherein the rectangular inner frame is used for installing the door leaf;

[0041] The outer frame is shaped like the cross-sectional structure of the tunnel where it is installed;

[0042] Supports are provided between the inner and outer frames.

[0043] In an embodiment of the present invention, the door frame constitutes the basic structure of the tunnel damper, the door leaf is installed on the door frame, and the door frame is installed at a given position in the tunnel through an anchoring device. Among them, a plurality of hanging hole groups are distributed on the side of the door frame opposite to the tunnel wall, and the anchoring device is anchored to the tunnel wall, and a pull rod is provided. The pull rod passes through the hanging holes in the hanging hole group and is constrained by the reverse constraint, thereby fixing the door frame based on the hanging method. When the tunnel is deformed, as long as the deformation is less than or equal to the deformation determined by the avoidance space, the pull rod moves freely from the hanging hole to the door frame side without generating a force that causes the door frame to deform. Even if a positive constraint is set on the pull rod for the convenience of assembly, this positive constraint has relatively low requirements on the locking force, and the force required to destroy the positive constraint is not enough to cause plastic deformation of the door frame. Therefore, on the whole, within the limit determined by the avoidance space, the deformation of the tunnel will not cause the damper to be unable to open. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 It is a schematic diagram of the structure of the tunnel air door in the direction along the tunnel in one embodiment.

[0045] Figure 2 It is a schematic diagram of the structure of a tunnel air door in a direction perpendicular to the tunnel ground in one embodiment.

[0046] Figure 3 Schematic diagram of the structure of an anchor pulling device in one embodiment.

[0047] Figure 4 Schematic diagram of the structure of a limiting device in one embodiment.

[0048] In the figure: 1. anchor pulling device, 2. stabilizing device, 3. door axis, 4. left door leaf, 5. lower left support, 6. tunnel wall, 7. avoidance space, 8. upper left support, 9. air duct, 10. splint, 11. connecting bolt, cable trough, 13. cable, 14. upper right support, 15. outer door frame, 16. right door leaf, 17. lower right support, 18. pin shaft, 19. left turning arm, 20. connecting rod, 21. executive force mechanism, 22. pin shaft, 23. right turning arm, 24. fastening nut, 25. auxiliary plate, 26. locking nut, 27. fastening nut, 28. fixing plate, 29. anchor rod, 30. fastening nut, 31. pull rod, 32. splint, 33. base plate, 34. anchor rod, 35. fastening nut, 36. locking nut. DETAILED DESCRIPTION

[0049] In the embodiments of the present invention, unless otherwise specified, the direction perpendicular to the tunnel cross section is referred to as the front-rear direction, and the two sides along the tunnel direction are referred to as the left and right sides.

[0050] It should be noted that pulling does not necessarily mean pulling in the vertical direction. Pulling often provides a force in one direction so that the object being pulled is pulled in the direction of the force.

[0051] It should be known that, compared with the pressure-resistant damper based on buffering, the embodiment of the present invention focuses on avoiding pressure. Such pressure avoidance does not mean that it needs to be completely avoided. If the unavoided part is not sufficient to cause the tunnel damper to produce plastic deformation or elastic deformation that cannot be restored under pressure, it is allowed.

[0052] It should be understood that no matter which type of damper is used, such as based on buffering or based on avoidance, there is a maximum limit of reliable use. In the embodiment of the present invention, the maximum limit is determined by Figure 1 The avoidance space 7 shown in FIG.

[0053] Unless otherwise specified, the door frame as a whole is a vertical frame, which can usually be understood as a frame that is perpendicular to the ground of the tunnel, but a tilt margin is allowed.

[0054] It should be known that the door frame is the framework for installing the door leaf, and there is no specific restriction on its structure as long as the requirements for door leaf installation are met.

[0055] In the embodiment of the present invention, the door frame generally refers to the door frame including the following: Figure 1 The outer door frame 15, the lower left support 5, the upper left support 8, the upper right support 14, the lower right support 17, and the inner door frame assembly are shown in FIG.

[0056] exist Figure 1 and Figure 2 The tunnel air door shown includes a door frame portion, an anchoring device 1, a stabilizing device 2, a door leaf, a driving device for driving the door leaf to open and close, and a closing component not shown in the figure.

[0057] Regarding the door frame, Figure 1 As can be seen in the figure, the door frame is supported on the ground of the tunnel or other structures, and there is a clearance space 7 between the left and right sides of the door frame and the arch and the tunnel wall 6 on which the door frame is installed. The clearance space 7 is based on avoidance, which is different from the buffer based on elastic control. The clearance space 7 can be smaller than the buffer space, and generally can be selected to be 0.6~0.8 times of the traditional buffer space on the basis of the traditional buffer space. The multiple here is usually determined according to the distance. The escape space 7 is actually the distance between the door frame and the tunnel wall 6.

[0058] It is understandable that, if space permits, the avoidance space 7 can be relatively large, without being restricted by the aforementioned multiple of the buffer space.

[0059] As an option, when the avoidance space 7 is described as the distance between the tunnel wall 6 and the door frame, the distance is 135 mm to 200 mm, preferably 165 mm.

[0060] In addition, a plurality of lifting hole groups are distributed on the side of the door frame opposite to the tunnel wall 6. The lifting hole groups are used to install the door frame on the tunnel wall 6 by hanging and pulling. The hole type and number of the lifting hole groups depend on the force required for hanging and pulling. The hole depth will not be too deep if the strength verification is met, and generally, more than 2 mm can meet the requirements.

[0061] It should be known that the door frame generally adopts a steel frame, and the material of the door frame itself has a higher tensile strength. In addition, the door frame should also provide an assembly space, so that for example the pull rod 31 passes through the locking after the hanging hole.

[0062] Figure 1 In the structure shown, the tunnel damper can be assembled on site, first installing the outer door frame 15, and then installing other components based on the outer door frame 15, such as the inner door frame and the support between the inner and outer door frames. It can be seen that when the outer door frame 15 is installed, the internal space constrained by the outer door frame 15 is relatively large, and there is no assembly interference.

[0063] As for the anchor pulling device 1, it is fixedly arranged on the tunnel wall 6, and the anchoring position is a part of the tunnel wall 6 that is aligned with the lifting hole group.

[0064] The anchoring device 1 is provided with a pull rod 31 aligned with the lifting hole in the lifting hole group at one end thereof, and the pull rod 31 cooperates with the lifting hole to lift the door frame. Accordingly, the pull rod 31 passes through the lifting hole from the lane side of the lifting hole and is locked using a locking structure or component.

[0065] It is understandable that in the embodiment of the present invention, the description method of "being reversely constrained after passing through the lifting hole" is adopted to express that the pull rod 31 has the function of lifting, rather than only being able to adopt the assembly method of being reversely constrained after passing through the lifting hole.

[0066] For example, the locking force provided by the fastening nut 27 is used as the reverse force, which is the basis for generating the pulling force of the pull rod 31. The force provided by the pull rod 31 in the opposite direction to the pulling force of the pull rod 31 is called the positive force.

[0067] In some embodiments, a degree of freedom is left for the pull rod 31 in the direction passing through the lifting hole from the side of the anchor device 1, that is, the pull rod 31 does not exert a force on the door frame in the direction opposite to the force provided by the fastening nut 27, so that the pull rod 31 is free in this direction, thereby causing deformation in the alley, and further, when the anchor device 1 is close to the door frame, the anchor device 1 does not exert a reverse force, thereby causing no deformation of the door frame.

[0068] In some embodiments, Figure 3 As shown, Figure 3 The auxiliary plate 25 is used to determine the assembly position of the pull rod 31 and the outer door frame 15, and at the same time provide a relatively high pre-tightening force for the fastening nut 27, which is not easy to loosen.

[0069] Correspondingly, in order to prevent the fastening nut 27 from loosening, a locking nut 26 is provided on the back side of the fastening nut 27 .

[0070] From the above description, it can be known that the pull rod 31 can still be constrained in the reverse direction, but the constraint will not generate a large force. The force check can be used to determine whether it will cause, for example, Figure 3 The outer door frame 15 in the middle is deformed and cannot be opened.

[0071] Figure 3 The middle auxiliary plate and the pull rod 31 can be assembled by, for example, interference fit or welding.

[0072] In some embodiments, radial holes may be opened on the pull rod 31 for setting, for example, shear pins. The shear force provided by the shear pins is certain, which facilitates calculation and verification.

[0073] Due to the existence of the escape space 7, a passage will be generated between the door frame and the lane wall 6, and communication will be generated along the lane direction. For this reason, a closing component is provided to block the escape space along the lane direction.

[0074] exist Figure 1 In the structure shown, there are eight anchoring devices 1, four on each side of the door frame. The four anchoring devices 1 on the left and right sides are symmetrical about the left and right symmetrical planes of the tunnel damper. By pulling, the tunnel damper can be roughly maintained in the desired upright state (relative to the tunnel ground).

[0075] However, the positioning formed by pulling in the direction of the lane is often not particularly stable. For this reason, a limiting device for limiting the front and rear sides of the door frame is provided on the lane wall 6, such as Figure 1 The stabilizing device 2 shown in FIG.

[0076] As mentioned above, the stabilizing device 2 provides a force on the door frame in the direction along the lane, rather than a force in the direction relative to the lane wall 6 and the door frame, and the deformation of the lane will not cause the deformation of the door frame due to the existence of the stabilizing device 2. Even if there is an impact, this impact is relatively weak.

[0077] In some embodiments, the structures or components for limiting the front side of the door frame and the rear side of the door frame may be independent of each other, for example, a limiting method using a baffle, a baffle rod or a baffle pin may be used.

[0078] In the structure shown in the figure, the limiting device includes a base plate 33 anchored on the tunnel wall and two clamping plates 32 mounted on the base plate 33 or integrated with the base plate 33; accordingly, the door frame is clamped between the two clamping plates 32 and limited forward and backward.

[0079] As mentioned in the foregoing, a plurality of anchoring devices 1 can be reasonably distributed to better fix the door frame. Based on the principle of suspension, in a preferred embodiment, the closer the anchoring devices 1 are to the top of the tunnel, the greater the distribution density.

[0080] from Figure 1~Figure 3 As can be seen from the structure shown, the anchor pulling device 1 comprises:

[0081] Anchors, embedded or installed in the tunnel wall 6, Figure 3 The anchor rod 29 is clearly used in the embodiment, and other anchoring members may also be used. After the tunnel wall 6 is formed, the anchoring member may be constructed by, for example, drilling an anchor hole and then driving an anchor bolt.

[0082] The anchors can also be constructed in a pre-buried manner.

[0083] Each anchor pulling device 1 is adapted to be equipped with four anchor rods 29 , and in some embodiments, two or three anchor rods may be used.

[0084] A fixing plate 28 is also provided. A through hole can be opened on the fixing plate 28 for the anchor rod 29 to pass through. The anchor rod 29 and the through hole can be connected by welding. The exposed section of the anchor rod 29 can form a screw rod. Figure 3 The fastening nut 27 and the lock nut 26 are shown assembled.

[0085] The fixing plate 28 serves as a mounting base for the pull rod 31 , and the pull rod 31 and the fixing plate 28 are preferably connected by welding.

[0086] In some embodiments, the pull rod 31 adopts a headed pull rod, and accordingly, a pull rod hole is opened on the fixed plate 28, and the diameter of the pull rod hole is smaller than the diameter of the pull rod head, so that the pull rod can pass through the pull rod hole, but the pull rod head cannot pass through, forming a limit on the pull rod 31 in the rod direction of the fixed plate 28.

[0087] Regarding the closure of the escape space 7, since the closure component providing closure of the escape space 7 does not need to bear a large force, the selection thereof is relatively flexible.

[0088] In some embodiments, the closing component used is recorded as the first method, which is mainly closed by closing the port of the avoidance space 7. Specifically, a blocking piece is provided at one or both ends of the avoidance space 7 along the lane direction.

[0089] When one end is closed, it should be the end of the avoidance space 7 corresponding to the side with relatively higher wind pressure in the tunnel, and the seal is formed by the pressure applied to the sealing piece by the wind pressure.

[0090] It should be noted that in the description of relative concepts, it is only necessary to distinguish the relative size but not the exact value.

[0091] In some embodiments, the sealing component used is recorded as the second method, and the second method uses a method of filling a sealing medium in the avoidance space 7 to achieve sealing.

[0092] As mentioned above, since the sealing component does not need to bear the force in the relative directions between the tunnel wall 6 and the door frame, the sealing medium can be a sealing medium without bearing capacity, such as polyurethane.

[0093] Polyurethane can be prepared by foaming, for example, in the avoidance space 7 to form a blocking component.

[0094] In some other embodiments, it can be recorded as the third mode, which is a composite structure of the first two modes, except that after the second mode exists, when the first mode is composited, the requirements for the first mode are lower.

[0095] Regarding the blocking piece, it can be fixed on one side or on both sides, where the sides are the tunnel wall 6 and the door frame that determine the escape space 7. When fixed on one side, the blocking piece is fixed on the tunnel wall 6, and then covers the mouth of the escape space 7 by overhanging.

[0096] In some embodiments, the blocking piece is a rubber sealing piece; relatively speaking, the rubber sealing piece is relatively hard, and further, a shielding piece that is softer than the rubber sealing piece is provided on the outer side of the rubber sealing piece to improve the sealing ability.

[0097] The tunnel damper can be a double door or a single door. For the double door, due to relative redundancy, when one door fails, the probability of the other door also failing is relatively low, and it has better availability. Therefore, the tunnel damper is preferably a double door, that is, there are two door leaves. In addition, when two door leaves of the same area are closed, a single door leaf is relatively small, and it is not easy to cause movement and assembly interference.

[0098] The door leaf is mounted on a door frame, specifically an inner door frame, via a door shaft 3 .

[0099] The door leaf can be opened manually or by a driving device, wherein the latter is suitable for automatic control and can be easily integrated into the mine operation and maintenance system.

[0100] Figure 2 The structure shown shows two tunnel air doors, which can be used as one set of tunnel air doors or two sets of tunnel air doors, configured according to the requirements of different mines.

[0101] Figure 2 In the embodiment, the driving device comprises:

[0102] The crank arm is installed on the door shaft 3 of the corresponding door leaf, such as Figure 2The left turning arm 19 shown in the figure is installed on the door shaft 3 of the left door leaf 4, and the right turning arm 23 is installed on the door shaft 3 of the right door leaf 16.

[0103] Figure 2 In the figure, the solid line represents the state of the door leaf being closed, and the dotted line represents the state of the door leaf being opened. When the door leaf is opened, the two door shafts 3 rotate in the same direction. Because the two door leaves are separated on the left and right, the left door leaf 4 opens downward in the figure, and the right door leaf 16 opens upward. This door opening method does not affect the function of the damper, but is conducive to the layout of the driving device for opening and closing the two door leaves.

[0104] Furthermore, a connecting rod 20 is provided, one end of which is hinged to one crank arm, and the other end of which is hinged to the other crank arm, for linkage between the two crank arms.

[0105] Furthermore, an execution mechanism is provided, wherein the actuating end of the execution mechanism is hinged to a crank arm, and based on the linkage, the two door leaves can be opened or closed synchronously.

[0106] In some embodiments, the actuator is a hydraulic cylinder or a pneumatic cylinder, which has a relatively simple structure. The drive of the crank arm is achieved by the rotation of the door shaft 3. Rotation is the most basic form of motion in the mechanical field, and there are many ways to achieve it, such as the basic form of motion output by the motor, which is rotation.

[0107] Figure 1 The assembly structure in the outer door frame 15 is shown, which is clearly shown in the figure and will not be described in detail here.

Claims

1. A tunnel damper, characterized in that: include: A clearance space is left between the door frame and the tunnel wall on which it is installed, and a plurality of hanging hole groups are distributed on the side of the door frame opposite to the tunnel wall; An anchoring device is anchored on the tunnel wall at a position aligned with the lifting hole group. One end of the anchoring device facing the lifting hole group is provided with a pull rod aligned with the lifting holes in the lifting hole group. After the pull rod passes through the lifting hole, it is locked by reverse constraint and is in a state of lifting the door frame; while the pull rod is free in the direction of passing through the lifting hole from the anchoring device side and forms a positive constraint; The closing component blocks the avoidance space in the direction of the lane; A door leaf, mounted on the door frame; A limiting device for limiting the front and rear sides of the door frame is provided on the tunnel wall; The limiting device comprises a base plate anchored on the tunnel wall and two clamping plates mounted on the base plate or integrated with the base plate; The door frame is clamped between the two plywoods and is limited in front and back positions; There are two sets of limit devices, and the two sets of limit devices are symmetrical about the left and right symmetric planes of the tunnel air door; The closer the anchor pull device is to the top of the tunnel, the greater the distribution density; The anchor pulling device includes: Anchors, embedded or installed in the tunnel wall; a fixing plate connected to the anchor; The pull rod is mounted on the fixed plate; The pull rod includes a screw rod segment, and the reverse constraint is a fastening nut matched with the screw rod segment.

2. The tunnel damper according to claim 1, characterized in that: A lock nut is provided for fastening the nut.

3. The tunnel damper according to claim 1, characterized in that: The closure member is configured as follows: In the first method, a blocking piece is provided at one or both ends of the avoidance space in the direction of the laneway; In the second method, the avoidance space is filled with a closed medium; In a third manner, the avoidance space is filled with a closed medium, and a blocking piece is provided at one or both ends of the avoidance space in the direction of the laneway.

4. The tunnel damper according to claim 3, characterized in that: The plugging piece is arranged on the high-pressure side of the tunnel air door and is fixed on one side, where the fixed side is the side where the tunnel wall is located; The sealing medium is a foamed material filler.

5. The tunnel damper according to claim 4, characterized in that: The sealing piece is a rubber sealing piece; A shielding sheet which is softer than the rubber sealing sheet is also arranged on the outer side of the rubber sealing sheet.

6. The tunnel damper according to claim 1, characterized in that: The door leaf consists of two parts, which are mounted on the door frame via door hinges.

7. The tunnel damper according to claim 6, characterized in that: The two door leaves are opened by a drive device.

8. The tunnel damper according to claim 7, characterized in that: The driving device comprises: A crank arm is installed on the corresponding door leaf; A connecting rod, one end of which is hinged to one crank arm, and the other end of which is hinged to the other crank arm; The actuator mechanism has an actuating end hinged with a crank arm, and uses the crank arm as a force arm to drive the door leaf to rotate around the door axis.

9. The tunnel damper according to claim 8, characterized in that: The actuator mechanism is a hydraulic cylinder or a pneumatic cylinder.

10. The tunnel damper according to claim 1, characterized in that: The door frame comprises an outer frame and a rectangular inner frame, wherein the inner frame is used for installing the door leaf; The outer frame is shaped like the cross-sectional structure of the tunnel where it is installed; Supports are provided between the inner and outer frames.

Images