Airtight door for passage apparatus of roll-on / roll-off ship

Abstract

The present utility model relates to the field of roll-on / roll-off apparatuses. Disclosed is an airtight door for a passage apparatus of a roll-on / roll-off ship, the airtight door comprising an inclined ramp, a door body and a horizontal passage, wherein the door body is arranged between the inclined ramp and the horizontal passage; the door body is hinged to the horizontal passage by means of a hinge having an oblong hole; a sealing assembly is provided on the door body; a door frame is provided on the horizontal passage; the door body and the door frame are arranged to fit each other, and the door body and the door frame are both obliquely arranged; a push-pull device is mounted in the horizontal passage; a slider is connected to one end of the push-pull device; and a support connecting rod is hinged to the slider, and the support connecting rod is hinged to the door body. The airtight door for a passage apparatus of a roll-on / roll-off ship provided in the present utility model can make full use of the door's own weight to perform compression sealing, has strong airtightness and a good sealing effect, is safe, stable and reliable, has a simple structure, and is easy to maintain; besides this, the airtight door achieves a design without a door sill raised from the ground, does not hinder the passage of vehicles or the transport of goods, and has strong applicability.

Description

An airtight door for roll-on / roll-off ship passageway equipment Technical Field

[0001] This utility model relates to the field of roll-on / roll-off equipment, and in particular to an airtight door for roll-on / roll-off ship passageway equipment. Background Technology

[0002] For safety reasons, roll-on / roll-off (Ro-Ro) ships are equipped with airtight doors in their passageways during navigation. Currently, the door panels and frames of airtight doors on the market are all vertically aligned, and their sealing is achieved by fixing rubber sealing rings around the door body and pressing them tightly against the door frame; there is a lack of airtight doors that can utilize the weight of the door itself to press the rubber sealing rings to enhance the sealing performance. Utility Model Content

[0003] In view of the above-mentioned shortcomings, this utility model provides an airtight door for roll-on / roll-off ship passage equipment, which can make full use of the door's own weight for compression sealing, with strong airtightness, good sealing effect, safety, stability and reliability, simple structure, and easy maintenance. At the same time, it realizes the design of a threshold without protruding from the ground, so it will not obstruct the passage and transportation of vehicles or goods, and has strong applicability.

[0004] To achieve the above objectives, the embodiments of this utility model adopt the following technical solutions:

[0005] An airtight door for a roll-on / roll-off ship passageway includes an inclined ramp, a door body, and a horizontal passage. The door body is located between the inclined ramp and the horizontal passage and is hinged to the horizontal passage via an elongated hole hinge. The door body is provided with a sealing component, and a door frame is provided on the horizontal passage. The door body and the door frame are fitted together and are both inclined. A push-pull device is installed in the horizontal passage. One end of the push-pull device is connected to a slider, and a support rod is hinged to the slider. The support rod is hinged to the door body.

[0006] According to one aspect of the present invention, the door body is provided with a lower pin, and the inclined ramp is provided with a lower wedge groove. When the door body is fully closed, the lower pin is inserted into the lower wedge groove.

[0007] According to one aspect of the present invention, the sealing assembly includes a sealing gasket and a sealing strip, which are respectively fixed around the door body, and the sealing strip has a cavity inside.

[0008] According to one aspect of the present invention, gaskets are provided on both the door frame and the inclined ramp, and when the door body is closed, the sealing component is pressed into contact with the gaskets.

[0009] According to one aspect of the present invention, the inclined ramp is provided with a pad and a wedge groove box, the door body is disposed between the door frame and the pad, a gasket is fixed on the pad, and a lower wedge groove is provided in the wedge groove box.

[0010] According to one aspect of this utility model, a guide rail is fixed inside the horizontal channel, and the slider is slidably connected to the guide rail.

[0011] According to one aspect of the present invention, a safety locking device is installed in the horizontal channel. The safety locking device includes a telescopic device and a safety pin connected together. A safety plate is fixed on the slider, and the safety pin is located on one side of the safety plate.

[0012] According to one aspect of the present invention, the safety locking device further includes a guide groove plate and a support plate, wherein the safety plate is disposed between the guide groove plate and the support plate. When the door body is fully opened, the safety pin passes through the guide groove plate and connects between the support plate and the safety plate.

[0013] According to one aspect of the present invention, the door body is provided with a side wedge block, the door frame is provided with a side stop part, the side stop part is provided with a side wedge groove, and the side wedge block and the side wedge groove are connected in a cooperative manner.

[0014] According to one aspect of the present invention, the door body is further provided with a telescopic rod, a side pin, and a slot. The telescopic rod is connected to the pin, and the door frame is provided with a side slot. The pin is driven by the telescopic rod to be inserted into the slot and the side slot in sequence to lock the door body and the door frame.

[0015] The advantages of this invention are as follows: When the door panel is closed, due to the inclined design of the door panel (passage door frame, passage threshold), its own weight can compress the sealing gasket, the first sealing strip, and the second sealing strip. Simultaneously, because both the first and second sealing strips have cavities, the first V-shaped protrusion deforms after contacting the passage door frame, and the second V-shaped protrusion deforms after contacting the passage threshold. This results in a better seal at the top, sides, and bottom of the door panel, leading to excellent sealing performance. Thus, this airtight door sealing structure has strong airtightness, is safe, stable, and reliable, and has a simple overall structure. By setting auxiliary sealing strips and auxiliary V-shaped protrusions to contact the passage door frame, this structure can further enhance the sealing performance and achieve an even better sealing effect. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 is a schematic diagram of the structure of this utility model;

[0018] Figure 2 is a schematic diagram of the closing process of this utility model;

[0019] Figure 3 is a cross-sectional structural diagram of this utility model;

[0020] Figure 4 is a structural schematic diagram of the door body described in this utility model;

[0021] Figure 5 is a partial structural schematic diagram (I) of Figure 3;

[0022] Figure 6 is a partial structural schematic diagram (II) of Figure 3;

[0023] Figure 7 is a partial structural schematic diagram of this utility model.

[0024] The names corresponding to the serial numbers in the diagram are as follows:

[0025] 1. Inclined ramp; 2. Horizontal passage; 3. Door frame; 4. Gasket; 5. Door body; 6. Long oval hole hinge; 7. Sealing gasket; 8. Sealing strip; 9. Push-pull device; 10. Slider; 11. Support rod; 12. Cavity; 13. Pad; 14. Lower wedge groove; 15. Guide rail; 16. Auxiliary sealing strip; 17. Safety pin; 18. Guide groove plate; 19. Support plate; 20. Side wedge block; 21. Side stop; 22. Side wedge groove; 23. Telescopic rod; 24. Side pin; 25. Groove; 26. Side slot; 27. Lower pin. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model. In the description of the present utility model, it should be noted that the terms "top", "bottom", "one side", "the other side", "front", "back", "middle part", "inner", "top", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model.

[0027] Example 1

[0028] As shown in Figures 1-6, an airtight door for a roll-on / roll-off (Ro-Ro) ship passageway includes an inclined ramp 1, a horizontal passageway 2, a door frame 3, a stainless steel gasket 4, a door body 5, an elongated hole hinge 6, a sealing assembly, a push-pull device 9, a slider 10, and a support rod 11. The inclined ramp 1 and the horizontal passageway 2 form a continuous passageway for vehicles or cargo to enter and exit on the Ro-Ro ship. The inclined ramp 1 is inclined at an angle to the horizontal direction, with an angle of 6 to 9.5 degrees. A gasket 13, which is an inclined flat plate, is fixed on the inclined ramp 1. The door frame 3 is located at the entrance / exit of the horizontal passageway 2, and the two are integrated. The structural shapes of the door frame 3 and the door body 5 are compatible with each other. The gasket 4 is fixed to the surface of the door frame 3 and the surface of the gasket 13, respectively, for compression sealing with the sealing assembly. The door body 5 is located between the inclined ramp 1 and the horizontal passage 2, and is fitted between the door frame 3 and the pad 13. The door body 5 has a conventional structure, and its top is hinged to the horizontal passage 2 via an elongated hole hinge 6. Both the door body 5 and the door frame 3 are inclined at an angle of 15 degrees to the vertical direction, which facilitates the use of the door body 5's own weight to compress the sealing assembly, enhancing the sealing effect. The sealing assembly includes two sets of sealing gaskets 7 and sealing strips 8. The sealing gaskets 7 are fixed on the left and right sides of the door body 5, and the sealing strips 8 are fixed on the top side and bottom of the door body 5, respectively, thus ensuring the sealing of the top, sides, and bottom of the airtight door. The sealing strip 8 has a cavity 12 inside, which facilitates the compression and deformation of the sealing strip 8, resulting in a better sealing effect. The push-pull device 9 is a pure electric cylinder, which is fixedly installed above the inner wall of the horizontal channel 2; the slider 10 is fixed to the extended end of the push-pull device 9; the bottom end of the support rod 11 is hinged to the slider 10 and the top end is hinged to the door body 5, and the top end of the support rod 11 is extremely close to the elongated hole hinge 6.

[0029] In this embodiment, a guide rail 15 is fixed to the bottom of the inner wall of the horizontal channel 2. The guide rail 15 is vertically arranged, and its structure is not limited; it can be a square plate. The slider 10 is slidably connected to the guide rail 15, and their structural shapes are compatible with each other. The guide rail 15 facilitates the lifting and lowering of the slider 10, making the structure more stable.

[0030] In this embodiment, a safety locking device is also installed in the horizontal channel 2. The safety locking device includes a telescopic device, a safety pin 17, a guide groove plate 18, and a support plate 19. The telescopic device is connected to the safety pin 17, and the guide groove plate 18 and the support plate 19 are both vertically arranged. A safety plate is vertically fixed on the slider 10, and the safety plate can move up and down between the guide groove plate 18 and the support plate 19. When the door body 5 is fully opened upwards, the telescopic device drives the safety pin 17 to extend, so that the safety pin 17 passes through the guide groove plate 18. At this time, the safety pin 17 abuts against the upper surface of the support plate 19, and the safety plate is located directly above the safety pin 17, with the two in contact or at a certain distance. In this way, a safety locking function can be achieved, avoiding the risk of the door body 5 falling after being opened upwards by the push-pull device 9, etc., making the structure safer and more stable. The guide plate 18 has corresponding holes for the safety pin 17 to pass through; the guide plate 18 serves both to guide the safety pin 17 and to stabilize the structure. The support plate 19 provides additional support for the safety pin 17, making the entire locking structure safer and more stable.

[0031] In this embodiment, side wedges 20, which are parallelepiped in shape, are fixed on the left and right sides of the door body 5. Side stop portions 21, which are provided on the left and right sides of the door frame 3, are fixed on the left and right sides respectively. The side stop portions 21 are provided with side wedge grooves 22. The side stop portions 21 can be composed of several prisms, and the side wedge grooves 22 can be wedge-shaped groove structures formed by combining two prisms, or they can be wedge-shaped groove structures integrally opened on a single prism. The side wedges 20 and the side wedge grooves 22 are connected and their structural shapes are adapted to each other. When the door body 5 is completely closed, the side wedges 20 are inserted into the side wedge grooves 22 and are simultaneously held in place by the side stop portions 21. In this way, it can both prevent the rubber of the sealing component from being over-compressed and enhance the structural sealing performance and stability.

[0032] In this embodiment, the door body 5 is also provided with two sets of telescopic rods 23, side pins 24, and slots 25, respectively, symmetrically arranged at the left and right ends of the door body 5; side slots 26 are provided on the left and right sides of the door frame 3. The telescopic rods 23 are electric cylinders or hydraulic cylinders, which are fixedly installed on the inner wall of the door body 5, and the extended end of the telescopic rods 23 is fixed to the side pins 24; the side pins 24 are rectangular; the slots 25 are square holes, which are opened on the side of the door body 5; the side slots 26 are rectangular slots; the structural shapes and arrangements of the side pins 24, slots 25, and side slots 26 are compatible with each other. When the door body 5 is fully closed, the telescopic rods 23 extend, driving the side pins 24 to be inserted into the slots 25 and side slots 26 in sequence, thereby locking and fixing the door body 5 to the door frame 3. The telescopic rod 23, side pin 24, groove 25, side slot 26, etc. are used to lock and fix the door body 5 after it is closed, ensuring the structural stability. At the same time, they can also seal the middle of the door body 5 and enhance the sealing effect.

[0033] In this embodiment, the sealing gasket 7 is V-shaped and made of rubber, used for sealing the left and right sides of the door body 5, or the entire airtight door. The sealing strip 8 is made of rubber and used for sealing the top and bottom of the door body 5. The structure of the sealing strip 8 can be divided into a main body and a V-shaped protrusion. The main body is strip-shaped (the overall cross-section is rectangular) and is completely filled and fixed inside the door body 5. The V-shaped protrusion is V-shaped (the overall cross-section is V-shaped or isosceles triangle) and protrudes or is exposed outside the door body 5, which facilitates the compression deformation of the sealing strip 8 and facilitates sealing.

[0034] In practical applications, the inclined ramp 1, the horizontal passage 2, the door frame 3, and the door body 5 are all existing technologies and will not be described in detail.

[0035] In this embodiment, the complete opening process of the airtight door is as follows: The push-pull device 9 retracts upward, driving the slider 10 to rise along the guide rail 15 (the safety plate rises between the guide groove plate 18 and the support plate 19), which in turn drives the support connecting rod 11 to rise and rotate, thereby driving the door body 5 to rotate upward and open. After opening to the limit position (at this time, the slider 10 is located at a certain distance above the safety pin 17), the telescopic device drives the safety pin 17 to extend through the guide groove plate 18, so that the safety pin 17 is engaged between the support plate 19 and the safety plate, thereby completing the entire opening or fully opening process of the airtight door.

[0036] In this embodiment, the complete closing process or principle of the airtight door is as follows: The push-pull device 9, i.e., the pure electric cylinder, extends downwards while the door body 5, under its own weight, drives the slider 10 to descend along the guide rail 15 (the safety plate descends between the guide groove plate 18 and the support plate 19). At this time, the bottom end of the support rod 11 also descends, and the door body 5 rotates downwards to slowly close (during this process, due to the weight of the door body 5, the push-pull device 9 does not push the slider 10 downwards, but provides an upward pulling force to the slider 10; the force for the slider 10 to descend is provided by the weight of the door body 5). Because the support rod 11 is extremely close to the elongated hole hinge 6, with the connection point of the elongated hole hinge 6 as the fulcrum, there is a significant difference in torque on both sides of the door body 5. Therefore, during the closing process of the door body 5 against the door frame 3, the lower edge of the door body 5 will contact the door frame 3 first; subsequently… As the push-pull device 9 continues to extend downwards, the rubber sealing strip 8 at the bottom of the door body 5 begins to compress by about 10mm under the weight of the door body 5, which hinders the rotation of the door. The door body 5 begins to move downwards as a whole, while the side wedges 20 on both sides of the door body 5 are inserted into the side wedge grooves 22 and simultaneously held in place by the side stop 21. Finally, the bottom of the door body 5 is attached to the pad plate 13, and the side of the door body 5 is attached to the door frame 3. At this time, the side pin 24 is driven to be inserted into the slot 25 and the side slot 26 in sequence to lock the door body 5 and the door frame 3. (At this time, the safety pin 17 can also extend through the guide groove plate 18 and be placed on the support plate 19, locking the safety plate at the bottom of the space formed by the support plate 19, the safety pin 17, and the guide groove plate 18, making the door sealing structure more solid.) This completes the entire closing or fully closing process of the airtight door.

[0037] The beneficial effects of this embodiment are as follows: By tilting both the door body 5 and the door frame 3, this airtight door can fully utilize its own weight to compress the sealing components, resulting in stronger airtightness and reducing the use of sealing pins in traditional airtight doors. The cavity 12 within the sealing strip 8 further enhances the sealing effect of this airtight door. The overall structure of this airtight door is simple, safe, stable, and reliable.

[0038] Example 2

[0039] The difference between this embodiment and embodiment one is that a number of lower pins 27 are fixed at the bottom of the door body 5, and a number of lower wedge grooves 14 are opened in the inclined ramp 1. When the door body 5 is completely closed, the lower pins 27 are inserted into the lower wedge grooves 14.

[0040] In this embodiment, several wedge-shaped boxes are embedded and fixed within the inclined ramp 1; each wedge-shaped box has a lower wedge groove 14. The lower pin 27 is rectangular block-shaped with a wedge-shaped bottom; the structural shape of the lower wedge groove 14 matches the structural shape of the bottom of the lower pin 27.

[0041] In this embodiment, since the position of the support link 11 is very close to the oblong hole hinge 6, and the connection point of the oblong hole hinge 6 is the fulcrum, there is a large difference in torque on both sides of the door body 5. Therefore, the door body 5 will rotate first (the center of rotation is at the top of the oblong hole hinge 6) and then slide down as a whole, instead of sliding down first and then rotating.

[0042] In this embodiment, the complete closing process or principle of the airtight door is as follows: The push-pull device 9, i.e., the pure electric cylinder, extends downwards while simultaneously driving the slider 10 to descend along the guide rail 15 under the weight of the door body 5 (the safety plate descends between the guide groove plate 18 and the support plate 19). At this time, the bottom end of the support rod 11 also descends, and the door body 5 rotates downwards to slowly close (during this process, due to the weight of the door body 5, the push-pull device 9 does not push the slider 10 downwards, but rather provides an upward pulling force to the slider 10; the force for the slider 10 to descend is provided by the weight of the door body 5). Since the support rod 11 is extremely close to the elongated hole hinge 6, with the connection point of the elongated hole hinge 6 as the fulcrum, there is a significant difference in torque on both sides of the door body 5. Therefore, during the closing process of the door body 5 against the door frame 3, the lower edge of the door body 5 will contact the door frame 3 first; as the push-pull device 9 continues downwards... As the door body 5 extends, the rubber sealing strip 8 at the bottom of the door body 5 compresses by about 10mm under its own weight, hindering the door's rotation. The door body 5 then begins to move downwards as a whole. Subsequently, the side wedges 20 on both sides of the door body 5 are engaged in the side wedge grooves 22 and simultaneously held in place by the side stop 21. The lower pin 27 at the bottom of the door body 5 is inserted into the lower wedge groove 14. Finally, the bottom of the door body 5 is attached to the pad 13, and the sides of the door body 5 are attached to the door frame 3. At this time, the side pin 24 is driven to be inserted into the slot 25 and the side slot 26 in sequence to lock the door body 5 and the door frame 3. (At this time, the safety pin 17 can also extend through the guide groove plate 18 and be placed on the support plate 19, locking the safety plate at the bottom of the space formed by the support plate 19, the safety pin 17, and the guide groove plate 18, making the door sealing structure more robust.) This completes the entire closing or fully closing process of the airtight door.

[0043] The beneficial effects of this embodiment are as follows: by setting the lower latch 27, the sealing effect of the bottom of the airtight door can be enhanced, the airtightness is strong, and at the same time, the design of a threshold without protruding from the ground is realized, which will not hinder the passage and transportation of vehicles or goods, and the applicability is stronger.

[0044] Example 3

[0045] The difference between this embodiment and Embodiment 1 is that the sealing assembly further includes several auxiliary sealing strips 16, which are regularly distributed on the door body 5.

[0046] In this embodiment, the auxiliary sealing strip 16 also has a cavity 12; the auxiliary sealing strip 16 is also made of rubber, and its structural shape is similar to that of the sealing strip 8, which is used to strengthen the sealing of the middle part of the door body 5.

[0047] In this embodiment, there are four sets of auxiliary sealing strips 16, with two sets spaced apart at the middle position on both the left and right sides of the door body 5; the auxiliary sealing strips 16 can be located inside the sealing gasket 7 or the sealing gasket 7 can be broken in the middle.

[0048] The beneficial effects of this embodiment are as follows: by adding an auxiliary sealing strip 16 that presses against the gasket 4 on the door frame 3, the airtight door can further enhance its sealing performance and achieve a better sealing effect.

[0049] The advantages of this utility model are as follows:

[0050] By using the door's own weight to compress the sealing components, the airtightness can be improved, while reducing the use of sealing pins in traditional airtight doors.

[0051] By setting the lower latch 27, the sealing effect at the bottom of the airtight door can be enhanced, resulting in excellent sealing performance. At the same time, it also achieves a threshold design without protruding from the ground, which will not obstruct the passage and transportation of vehicles or goods, making it more versatile.

[0052] Compared to traditional side-sliding or roller shutter airtight doors, this airtight door opens and closes by rotating, requiring no additional space.

[0053] This airtight door has a simple overall structure, is safe, stable, reliable, and easy to maintain.

[0054] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. An airtight door for a roll-on / roll-off ship passageway, comprising an inclined ramp (1), a door body (5), and a horizontal passage (2), wherein the door body (5) is disposed between the inclined ramp (1) and the horizontal passage (2), the door body (5) is hinged to the horizontal passage (2) via an elongated hole hinge (6), the door body (5) is provided with a sealing assembly, and the horizontal passage (2) is provided with a door frame (3), the door body (5) and the door frame (3) being configured to cooperate, characterized in that, The door body (5) and the door frame (3) are both arranged obliquely, a horizontal passage (2) is provided with a sliding device (9), one end of the sliding device (9) is connected with a sliding block (10), the sliding block (10) is hingedly connected with a supporting connecting rod (11), and the supporting connecting rod (11) is hingedly connected with the door body (5).

2. The air-tight door for a RoRo vessel access equipment according to claim 1, characterized in that, The door body (5) is provided with a lower bolt (27), and the inclined ramp (1) is provided with a lower wedge groove (14); when the door body (5) is completely closed, the lower bolt (27) is inserted into the lower wedge groove (14).

3. The air-tight door for the access equipment of a ro-ro vessel according to claim 1, characterized in that, The sealing assembly comprises a sealing gasket (7) and a sealing strip (8), which are fixed around the door body (5), and the sealing strip (8) is provided with a cavity (12).

4. The air-tight door for a RoRo ship access equipment according to claim 2, characterized in that, The door frame (3) and the inclined ramp (1) are both provided with a gasket (4), and the sealing assembly is in extrusion contact with the gasket (4) when the door body (5) is closed.

5. The air-tight door for a RoRo vessel access equipment according to claim 4, characterized in that, The inclined ramp (1) is provided with a backing plate (13) and a wedge groove box, the door body (5) is arranged between the door frame (3) and the backing plate (13), the backing plate (13) is fixed with the gasket (4), and the wedge groove box is provided with the lower wedge groove (14).

6. The air-tight door for a RoRo ship access equipment according to claim 1, characterized in that, The horizontal passage (2) is fixedly provided with a guide rail (15), and the sliding block (10) is slidably connected with the guide rail (15).

7. The air-tight door for a RoRo vessel access equipment according to claim 6, characterized in that, The horizontal passage (2) is provided with a safety locking device, the safety locking device comprises a telescopic device and a safety bolt (17), the safety bolt (17) is connected with the telescopic device, the sliding block (10) is fixedly provided with a safety clamping plate, and the safety bolt (17) is arranged on one side of the safety clamping plate.

8. The air-tight door for a RoRo vessel access equipment according to claim 7, characterized in that, The safety locking device further comprises a guide groove plate (18) and a supporting clamping plate (19), the safety clamping plate is arranged between the guide groove plate (18) and the supporting clamping plate (19), and when the door body (5) is completely opened, the safety bolt (17) penetrates through the guide groove plate (18) and is connected between the supporting clamping plate (19) and the safety clamping plate.

9. The air-tight door for a RoRo ship access equipment according to claim 1, characterized in that, The door body (5) is provided with a side wedge block (20), the door frame (3) is provided with a side stop portion (21), the side stop portion (21) is provided with a side wedge groove (22), and the side wedge block (20) is connected with the side wedge groove (22) in a matched mode.

10. The air-tight door for a RoRo vessel access equipment according to claim 9, characterized in that, The door body (5) is further provided with a telescopic rod (23), a side bolt (24) and a slot (25), the telescopic rod (23) is connected with the bolt, the door frame (3) is provided with a side slot (26), the bolt is driven by the telescopic rod (23) and is sequentially inserted into the slot (25) and the side slot (26), and the door body (5) and the door frame (3) are locked.

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