CN211950593U

CN211950593U - Tunnel guard gate

Info

Publication number: CN211950593U
Application number: CN202020398697.3U
Authority: CN
Inventors: 王铮; 裴明方
Original assignee: Hebei Dingchuang Environmental Protection Engineering Co ltd
Current assignee: Hebei Dingchuang Environmental Protection Engineering Co ltd
Priority date: 2020-03-25
Filing date: 2020-03-25
Publication date: 2020-11-17
Anticipated expiration: 2030-03-25

Abstract

The utility model relates to a tunnel protection door belongs to tunnel protection technical field, and it is including setting up the door frame at the partition wall lateral wall, and the door frame is annular side's tubular construction, is provided with the door plant in the door frame, is provided with a plurality of runner assemblies and locking position subassembly between door frame and the door plant, the door frame is located the partition wall and keeps away from the lateral wall in tunnel, and the fixed a plurality of first built-in fittings and a plurality of second built-in fittings that are provided with of partition wall outer wall, the first connecting plate of the equal fixedly connected with of door frame lateral wall and roof and the laminating of first built-in fittings to and the second connecting plate with the laminating of second built-in fittings, be provided with first mounting between first connecting plate and the first built-in fittings, be provided with the second mounting between second connecting plate and the second.

Description

Tunnel guard gate

Technical Field

The utility model belongs to the technical field of the technique of tunnel protection and specifically relates to a tunnel guard gate is related to.

Background

The tunnel is usually provided with a chamber for placing equipment, and the tunnel protection door is a special-purpose door which is applied to railway tunnels, such as transverse passages, chambers of various equipment (ventilation, communication, electric power and the like), substations and the like, and has the functions of fire prevention, explosion resistance, positive and negative air pressure caused by periodic piston wind of trains, equipment damage prevention and personnel safety guarantee.

The prior Chinese patent with reference to the publication No. CN209800012U discloses an anti-falling device suitable for a tunnel protection door, which belongs to the technical field related to the tunnel protection door, wherein an alarm assembly consisting of a roller, a chain, a traction motor, a control module and the like is arranged on a partition wall on one side of the back surface of the tunnel protection door, the chain of the alarm assembly is correspondingly connected with the roller and the back surface of the tunnel protection door, and the traction motor correspondingly drives the roller to rotate, so that when the tunnel protection door fails or falls off, the control module can correspondingly alarm, and the chain can pull the tunnel protection door away from a tunnel rail area, thereby ensuring the safe operation of the tunnel rail area; its simple structure sets up portably, and the accurate when can effectively realize tunnel guard gate inefficacy or drop is reported to the police, prevents that tunnel guard gate from dropping the rail line district in tunnel.

The above prior art solutions have the following drawbacks: because above-mentioned technical scheme door frame only passes through the bolt fastening on the partition wall, the tunnel guard gate receives factors such as atmospheric pressure shock wave or unexpected explosion that the train was brought in the tunnel with the line, and the door frame can rock with the partition wall production, probably leads to the bolt not hard up or even drops for tunnel guard gate stability reduces.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a tunnel guard gate reaches the effect that improves tunnel guard gate stability.

The above utility model discloses an above-mentioned utility model purpose can realize through following technical scheme:

the utility model provides a tunnel protection door, sets up in tunnel one side, is including setting up the door frame at the partition wall lateral wall, and the door frame is annular square tubular construction, is provided with the door plant in the door frame, is provided with a plurality of runner assemblies and a locking position subassembly between door frame and the door plant, the door frame is located the partition wall and keeps away from the lateral wall in tunnel, and the partition wall outer wall is fixed to be provided with a plurality of first built-in fittings and a plurality of second built-in fittings, the equal fixedly connected with of door frame lateral wall and roof and the first connecting plate of first built-in fitting laminating to and the second connecting plate of second built-in fitting laminating, be provided with first mounting between first connecting plate and the first built-in fitting, be provided.

Through adopting above-mentioned technical scheme, first built-in fitting and second built-in fitting fixed mounting are inside the partition wall in advance, and expose partly, it is fixed with first connecting plate and first built-in fitting through first mounting, the second mounting is fixed with second connecting plate and second built-in fitting, can make the door frame fixed for the partition wall, the area of contact of first connecting plate and first built-in fitting, the area of contact of second connecting plate and second built-in fitting increases, make the door frame fixed more stable, the door frame is located the lateral wall that the tunnel was kept away from to the partition wall, the direct impact area who receives the shock wave of door frame has effectively been reduced, the effect that improves tunnel guard gate stability has been reached.

The utility model discloses further set up to: the cross section of the first embedded part located inside the partition wall is in a T shape, and the cross section of the second embedded part located inside the partition wall is in an L shape.

By adopting the technical scheme, the contact areas between the first embedded part and the partition wall and between the second embedded part and the partition wall are increased due to the arrangement of the T shape and the L shape, so that the resistance of the partition wall is increased when the first embedded part and the second embedded part are subjected to impact force, and the stability between the first embedded part and the partition wall and between the second embedded part and the partition wall is enhanced.

The utility model discloses further set up to: the door plate comprises an anti-explosion layer, a fireproof layer and a protective shell, the fireproof layer is located on two sides of the anti-explosion layer respectively, and the protective shell wraps the anti-explosion layer and the fireproof layer.

Through adopting above-mentioned technical scheme, the antiknock layer is located the midmost, and the flame retardant coating presss from both sides the antiknock layer tightly, because no matter the train catches fire or the inside equipment of tunnel guard gate catches fire in the tunnel, all is along with the explosion very probably, and the flame retardant coating is located antiknock layer both sides, has effectively prevented that the antiknock layer from being reduced antiknock performance by the back of the fever, and the protective housing is with antiknock layer and flame retardant coating parcel, has effectively prevented that the flame retardant coating from weing and reducing fire behavior.

The utility model discloses further set up to: and a plurality of transverse reinforcing ribs and vertical reinforcing ribs are fixedly arranged inside the anti-explosion layer.

Through adopting above-mentioned technical scheme, setting up of horizontal, vertical strengthening rib forms a skeleton, has good mechanical properties for antiknock layer is more firm, has increased the antiknock effect of door plant.

The utility model discloses further set up to: the runner assembly includes first fixed plate, second fixed plate, fixed block, axis of rotation and connecting rod, and the lateral wall in tunnel is kept away from at the door frame to first fixed plate fixed connection, and tunnel lateral wall is kept away from at the door plant to second fixed plate fixed connection, and fixed block fixed connection keeps away from the lateral wall of door frame at first fixed plate, rotates between two fixed blocks to be connected with the axis of rotation, the vertical setting of axis of rotation, connecting rod one end and axis of rotation fixed connection, the other end and second fixed plate fixed connection.

Through adopting above-mentioned technical scheme, through promoting the door plant for the connecting rod drives the axis of rotation and rotates, and the door plant rotates along the axis of rotation, makes more light convenient when the door plant is opened and is closed, and the steadiness of runner assembly has been strengthened in the setting of first fixed plate and second fixed plate, and the steadiness between door plant and the door frame has been strengthened to the runner assembly simultaneously.

The utility model discloses further set up to: the locking assembly comprises a rotating rod, a gear, a rack and a limiting frame, the rotating rod penetrates through the door panel and is perpendicular to the side wall of the door panel away from the tunnel, the gear is fixedly sleeved on the rotating rod, the rotating axis of the gear is collinear with the rotating axis of the rotating rod, the rack is arranged on the side wall of the door panel away from the tunnel, the rack is meshed with the gear, the limiting frame is fixedly connected to the side wall of the door panel away from the tunnel and the side wall of the door frame away from the tunnel, and the rack is located in the limiting frame.

Through adopting above-mentioned technical scheme, through rotating the bull stick for gear revolve, gear and rack toothing make the rack remove in spacing frame, and when the rack removed to get into the spacing frame that is located the door frame lateral wall, the rack was spacing inside the door frame with the door plant, prevented that the door plant from opening, and after the rack removed the spacing frame that leaves the door frame lateral wall, then can open the door plant, reached and pinned the door plant, spacing effect in the door frame.

The utility model discloses further set up to: the side wall of the rack close to the door plate is fixedly connected with a dovetail strip, the side wall of the door plate close to the rack is provided with a dovetail groove, the inner wall of the dovetail groove is abutted to the outer wall of the dovetail strip, the dovetail strip slides in the dovetail groove, and the length direction of the dovetail groove is parallel to the length direction of the rack.

Through adopting above-mentioned technical scheme, when gear revolve made the rack remove, the dovetail bar slided in the dovetail, because the cross-section of dovetail is the dovetail shape, has guaranteed that the rack is at the removal in-process, and the distance between rack and the door plant remains unchanged, and then has guaranteed the meshing degree of gear and rack to reach the more stable effect of removal of rack.

The utility model discloses further set up to: the door plate side wall is fixedly provided with a sealing sleeve, and the sealing sleeve seals a gap between the door plate and the rotating rod.

Through adopting above-mentioned technical scheme, because the bull stick runs through the door plant, the sealing cover is established at the bull stick outer wall, the both ends and the door plant lateral wall fixed connection of sealing cover for the gap between bull stick and the door plant is sealed by the sealing cover, has effectively prevented that atmospheric pressure shock wave from passing through from the gap between bull stick and the door plant.

The utility model discloses further set up to: hand wheels are fixedly connected to both ends of the connecting rod.

Through adopting above-mentioned technical scheme, can make the connecting rod rotate through rotating the hand wheel to this locking of carrying out the door plant makes the locking of door plant light more convenient.

The utility model discloses further set up to: the side wall of the rack far away from the door plate is fixedly connected with a reinforcing plate.

Through adopting above-mentioned technical scheme, after the rack is locked the door plant, the door plant receives the atmospheric pressure shock wave hour, and rack pressure can be applied to the door plant, and setting up of reinforcing plate makes the rack stronger, has effectively prevented that the rack from receiving the door plant and applying pressure in order to the fracture.

To sum up, the utility model discloses a beneficial technological effect does:

1. the contact area between the first connecting plate and the first embedded part and the contact area between the second connecting plate and the second embedded part are increased, so that the door frame is more stably fixed, the door frame is positioned on the side wall of the partition wall far away from the tunnel, the impact area of the door frame directly subjected to impact waves is effectively reduced, and the effect of improving the stability of the tunnel protective door is achieved;

2. the fireproof layer is positioned on two sides of the anti-explosion layer, so that the anti-explosion performance of the anti-explosion layer is effectively prevented from being reduced after the anti-explosion layer is burnt, the anti-explosion layer and the fireproof layer are wrapped by the protective shell, and the fireproof performance of the fireproof layer is effectively prevented from being reduced due to the fact that the fireproof layer is affected with damp;

3. through rotating the bull stick for gear revolve, gear and rack toothing make the rack remove in spacing frame, and when the rack removed to get into the spacing frame that is located the door frame lateral wall, the rack was spacing inside the door frame with the door plant, had reached and has pinned the door plant, spacing effect in the door frame.

Drawings

FIG. 1 is a schematic structural view of the side of the present invention away from the tunnel;

fig. 2 is a partial sectional view showing a connection relationship between a door frame and a partition wall;

FIG. 3 is a partial cross-sectional view showing the construction of a door panel;

FIG. 4 is an enlarged partial schematic view of portion A of FIG. 1;

FIG. 5 is a schematic diagram showing the structure of the capture assembly;

FIG. 6 is a partial cross-sectional view showing a dovetail strip and dovetail slot;

fig. 7 is a schematic structural view of the present invention near one side of the tunnel.

In the figure, 1, a partition wall; 11. a first embedded part; 12. a second embedded part; 13. reserving a hole; 2. a door frame; 21. a first connecting plate; 22. fixing the bolt; 23. a second connecting plate; 24. fastening a bolt; 25. fastening a nut; 3. a door panel; 31. an antiknock layer; 311. transverse reinforcing ribs; 312. a vertical reinforcing rib; 32. a fire barrier layer; 33. a protective shell; 4. a rotating assembly; 41. a first fixing plate; 42. a rotating shaft; 43. a fixed block; 44. a connecting rod; 45. a second fixing plate; 5. a capture assembly; 51. a rack; 52. a gear; 53. a rotating rod; 54. a limiting frame; 6. a hand wheel; 7. a dovetail strip; 71. a dovetail groove; 8. sealing sleeves; 9. a reinforcing plate.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Referring to fig. 1, for the utility model discloses a tunnel protection door sets up in tunnel one side, including door frame 2 of fixed connection at 1 lateral wall of partition wall, door frame 2 is located the lateral wall that the tunnel was kept away from to partition wall 1, and door frame 2 is annular square tubular structure, is provided with door plant 3 in the door frame 2, and door plant 3 is the cuboid form, 3 outer walls of door plant and 2 inner wall butts of door frame, is provided with runner assembly 4 and locking subassembly 5 between 2 and the door frame 3 of door frame, and runner assembly 4 makes door plant 3 rotate for door frame 2, and locking subassembly 5 is fixed door plant 3 for door frame 2.

As shown in fig. 1 and 2, a plurality of first embedded parts 11 and second embedded parts 12 are fixedly arranged in a partition wall 1, a part of each of the first embedded parts 11 and the second embedded parts 12 is exposed to the outside, the exposed part of each of the first embedded parts 11 is positioned on one side of the partition wall 1 away from a tunnel, the exposed part of each of the second embedded parts 12 is positioned on the opposite side and top of the inner wall of the partition wall 1, the cross section of each of the first embedded parts 11 positioned inside the partition wall 1 is in a T shape, the overall cross section of each of the first embedded parts 11 is in an i shape, the cross section and the overall cross section of each of the second embedded parts 12 positioned inside the partition wall 1 are in an L shape, first connecting plates 21 attached to the first embedded parts 11 and second connecting plates 23 attached to the second embedded parts 12 are fixedly connected to the side walls and the top walls of a door frame 2, first fixing parts are arranged between the first connecting plates 21 and the first embedded parts 11, in the embodiment, the first fixing piece is a fixing bolt 22, the fixing bolt 22 penetrates through the first connecting plate 21, the fixing bolt 22 is in threaded connection with the first embedded part 11, a preformed hole 13 is formed in the side wall of the partition wall 1, the fixing bolt 22 is inserted into the preformed hole 13, a second fixing piece is arranged between the second connecting plate 23 and the second embedded part 12, in the embodiment, the second fixing piece is a fastening bolt 24 and a fastening nut 25, the fastening bolt 24 penetrates through the first connecting plate 21 and the first embedded part 11, the fastening nut 25 is in threaded connection with the fastening bolt 24, and the fastening bolt 24 and the fastening nut 25 clamp and fix the second connecting plate 23 and the second embedded part 12; before the tunnel protection door is installed, a first embedded part 11 and a second embedded part 12 are embedded in a partition wall 1 to be fixed, a door frame 2 is placed on the side wall, far away from a tunnel, of the partition wall 1, so that a first connecting plate 21 is attached to the first embedded part 11, a second connecting plate 23 is attached to the second embedded part 12, the first connecting plate 21 is attached to the first embedded part 11 through a fixing bolt 22, the second connecting plate 23 is fixed to the second embedded part 12 through a fastening bolt 24 and a fastening nut 25, and the door frame 2 can be stably fixed on the partition wall 1; when the tunnel protection door receives the atmospheric pressure shock wave, the impulsive force that door plant 3 applied door frame 2 and the impact force that door frame 2 self received make first connecting plate 21 exert pulling force to first built-in fitting 11, second connecting plate 23 exert pulling force to second built-in fitting 12, and first built-in fitting 11 is fixed with partition wall 1 with second built-in fitting 12, has reached the effect that improves tunnel protection door stability.

As shown in fig. 3, door plant 3 includes antiknock layer 31, flame retardant coating 32 and protective housing 33, antiknock layer 31 is formed by the combination of fiber cement board and perforation galvanized steel sheet in this embodiment, flame retardant coating 32 is the aluminium silicate fiberboard, protective housing 33 is the glass steel material, antiknock layer 31 is located the middlest, the inside fixed horizontal strengthening rib 311 and the vertical strengthening rib 312 that is provided with of antiknock layer 31, flame retardant coating 32 is located antiknock layer 31 both sides respectively, protective housing 33 wraps up antiknock layer 31 and flame retardant coating 32, flame retardant coating 32 presss from both sides antiknock layer 31 tightly, it reduces antiknock performance effectively to have prevented antiknock layer 31 from being fired back, protective housing 33 is located the outside, it reduces fire behavior effectively to have prevented that flame retardant coating 32 from weing.

As shown in fig. 4, the rotating assembly 4 includes a first fixing plate 41, a second fixing plate 45, fixing blocks 43, a rotating shaft 42 and a connecting rod 44, the first fixing plate 41 is fixedly connected to a side wall of the door frame 2 far away from the tunnel, the second fixing plate 45 is fixedly connected to the door panel 3 far away from the tunnel side wall, the fixing blocks 43 are fixedly connected to a side wall of the first fixing plate 41 far away from the door frame 2, the rotating shaft 42 is rotatably connected between the two fixing blocks 43, an axis of the rotating shaft 42 is vertically arranged, one end of the connecting rod 44 is fixedly connected to the rotating shaft 42, and the other end of the connecting rod is; when pushing door plant 3, connecting rod 44 drives axis of rotation 42 and rotates for door plant 3 rotates along axis of rotation 42, has reached the effect of opening and closing door plant 3 that can relax convenient.

As shown in fig. 5 and 6, the locking assembly 5 includes a rotating rod 53, a gear 52, a rack 51 and a limiting frame 54, the rotating rod 53 is cylindrical, the rotating rod 53 penetrates through the door panel 3 and is perpendicular to the side wall of the door panel 3 away from the tunnel, the gear 52 is fixedly sleeved on the rotating rod 53, the gear 52 is located on one side of the door panel 3 away from the tunnel, the rotating shaft 42 line of the gear 52 is collinear with the rotating shaft 42 line of the rotating rod 53, the rack 51 is horizontally arranged on the side wall of the door panel 3 away from the tunnel, the rack 51 is meshed with the gear 52, the limiting frames 54 are three and located on the same horizontal line, wherein two limiting frames 54 are fixedly connected to the side wall of the door panel 3 away from the tunnel, the other limiting frame is fixed to the side wall of the door frame 2 away from the tunnel, the side wall of the rack 51 away from the door panel 3 is fixedly; the side wall of the rack 51 close to the door panel 3 is fixedly connected with a dovetail strip 7, the side wall of the door panel 3 close to the rack 51 is provided with a dovetail groove 71, the length direction of the dovetail groove 71 is horizontally arranged, the vertical section of the dovetail groove 71 is in a trapezoid shape, the inner wall of the dovetail groove 71 is abutted against the outer wall of the dovetail strip 7, and the dovetail strip 7 slides in the dovetail groove 71; both ends of the rotating rod 53 are fixedly connected with hand wheels 6 (refer to fig. 7), so that people on both sides of the door panel 3 can rotate the hand wheels 6 to open the door panel 3 to get in and out, the side wall of the door panel 3 is fixedly provided with a sealing sleeve 8, both ends of the sealing sleeve 8 are fixedly connected with two opposite side walls of the door panel 3, and the sealing sleeve 8 seals a gap between the door panel 3 and the rotating rod 53; the hand wheel 6 is rotated to enable the rotating rod 53 to rotate, the rotating rod 53 drives the gear 52 to rotate, the gear 52 is meshed with the rack 51, the rack 51 moves horizontally, the dovetail strip 7 slides in the dovetail groove 71, and the rack 51 can be inserted into the limiting frame 54 on the side wall of the door frame 2 or separated from the limiting frame 54 on the side wall of the door frame 2 by rotating the hand wheel 6 in the forward direction and the reverse direction, so that the effects of locking the door plate 3 and opening the door plate 3 are achieved.

The implementation principle of the embodiment is as follows: before the tunnel protection door is installed, a first embedded part 11 and a second embedded part 12 are embedded in a partition wall 1 to be fixed, a door frame 2 is placed on the side wall, far away from a tunnel, of the partition wall 1, so that a first connecting plate 21 is attached to the first embedded part 11, a second connecting plate 23 is attached to the second embedded part 12, the first connecting plate 21 is attached to the first embedded part 11 through a fixing bolt 22, the second connecting plate 23 is fixed to the second embedded part 12 through a fastening bolt 24 and a fastening nut 25, and the door frame 2 can be stably fixed on the partition wall 1; when the tunnel protection door is subjected to air pressure shock waves, the impact force exerted on the door frame 2 by the door plate 3 and the impact force exerted on the door frame 2 per se enable the first connecting plate 21 to exert a pulling force on the first embedded part 11 and the second connecting plate 23 to exert a pulling force on the second embedded part 12, and the first embedded part 11 and the second embedded part 12 are fixed with the partition wall 1, so that the effect of improving the stability of the tunnel protection door is achieved; when the door panel 3 is pushed, the connecting rod 44 drives the rotating shaft 42 to rotate, so that the door panel 3 rotates along the axis of the rotating shaft 42, and the effect of easily and conveniently opening and closing the door panel 3 is achieved; the hand wheel 6 is rotated to enable the rotating rod 53 to rotate, the rotating rod 53 drives the gear 52 to rotate, the gear 52 is meshed with the rack 51, the rack 51 moves horizontally, the dovetail strip 7 slides in the dovetail groove 71, and the rack 51 can be inserted into the limiting frame 54 on the side wall of the door frame 2 or separated from the limiting frame 54 on the side wall of the door frame 2 by rotating the hand wheel 6 in the forward direction and the reverse direction, so that the door plate 3 can be locked and unlocked; this embodiment has reached the effect that improves tunnel guard gate stability.

The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims

1. The utility model provides a tunnel guard gate, sets up in tunnel one side, including setting up door frame (2) at partition wall (1) lateral wall, door frame (2) are annular square tubular structure, are provided with door plant (3) in door frame (2), are provided with a plurality of rotating assembly (4) and locking subassembly (5), its characterized in that between door frame (2) and door plant (3): the tunnel is kept away from to door frame (2) are located partition wall (1) lateral wall, partition wall (1) outer wall is fixed and is provided with a plurality of first built-in fittings (11) and a plurality of second built-in fittings (12), door frame (2) lateral wall and roof equal fixedly connected with first connecting plate (21) with the laminating of first built-in fitting (11) to and second connecting plate (23) with the laminating of second built-in fitting (12), be provided with first mounting between first connecting plate (21) and first built-in fitting (11), be provided with the second mounting between second connecting plate (23) and second built-in fitting (12).

2. A tunnel guard door according to claim 1, wherein: the cross section of the first embedded part (11) located inside the partition wall (1) is T-shaped, and the cross section of the second embedded part (12) located inside the partition wall (1) is L-shaped.

3. A tunnel guard door according to claim 1, wherein: the door plate (3) comprises an anti-explosion layer (31), a fireproof layer (32) and a protective shell (33), wherein the fireproof layer (32) is respectively positioned on two sides of the anti-explosion layer (31), and the protective shell (33) wraps the anti-explosion layer (31) and the fireproof layer (32).

4. A tunnel guard door according to claim 3, wherein: and a plurality of transverse reinforcing ribs (311) and vertical reinforcing ribs (312) are fixedly arranged in the anti-explosion layer (31).

5. A tunnel guard door according to claim 1, wherein: rotating assembly (4) include first fixed plate (41), second fixed plate (45), fixed block (43), axis of rotation (42) and connecting rod (44), the lateral wall in tunnel is kept away from in first fixed plate (41) fixed connection door frame (2), tunnel lateral wall is kept away from in second fixed plate (45) fixed connection door plant (3), the lateral wall of door frame (2) is kept away from in fixed block (43) fixed connection at first fixed plate (41), it is connected with axis of rotation (42) to rotate between two fixed blocks (43), the vertical setting of axis of rotation (42), connecting rod (44) one end and axis of rotation (42) fixed connection, the other end and second fixed plate (45) fixed connection.

6. A tunnel guard door according to claim 1, wherein: the locking assembly (5) comprises a rotating rod (53), a gear (52), a rack (51) and a limiting frame (54), the rotating rod (53) penetrates through the door panel (3), the side wall of the tunnel is far away from the door panel (3) perpendicularly, the gear (52) is fixedly sleeved on the rotating rod (53), a rotating shaft (42) line of the gear (52) and a rotating shaft (42) line of the rotating rod (53) are collinear, the rack (51) is arranged on the side wall of the tunnel far away from the door panel (3), the rack (51) is meshed with the gear (52), the limiting frame (54) is fixedly connected to the side wall of the tunnel far away from the door panel (3) and the side wall of the tunnel far away from the door frame (2), and the rack (51) is located in the limiting frame (54).

7. A tunnel guard door according to claim 6, wherein: the side wall fixedly connected with dovetail strip (7) that rack (51) are close to door plant (3), dovetail (71) have been seted up to the side wall that door plant (3) are close to rack (51), dovetail (71) inner wall and dovetail strip (7) outer wall butt, and dovetail strip (7) slide in dovetail (71), and the length direction of dovetail (71) is on a parallel with the length direction of rack (51).

8. A tunnel guard door according to claim 6, wherein: the door plate (3) side wall is fixedly provided with a sealing sleeve (8), and the sealing sleeve (8) seals a gap between the door plate (3) and the rotating rod (53).

9. A tunnel guard door according to claim 6, wherein: both ends of the rotating rod (53) are fixedly connected with hand wheels (6).

10. A tunnel guard door according to claim 6, wherein: the side wall of the rack (51) far away from the door panel (3) is fixedly connected with a reinforcing plate (9).