Stainless steel escape well lid

Abstract

The utility model belongs to the field of municipal facilities, and provides a stainless steel escape well lid which comprises a base and a lid body. Wherein the base forms an annular side plate, an annular middle plate connected to the inner side of the annular side plate and an annular bottom plate connected to the outer side of the annular side plate, and the annular middle plate and the annular bottom plate are both perpendicular to the annular side plate; the cover body forms a cover plate matched with the end opening of the annular side plate in shape and further forms a plurality of supporting plates perpendicularly connected to the same side of the cover plate, the cover plate is hinged to the annular side plate, and the supporting plates can abut against the annular middle plate in the process of rotating along with the cover plate. The supporting plates have preset heights in the normal direction of the cover plate and can make the cover plate flush with an end opening of the annular side plate after abutting against the annular middle plate, the multiple supporting plates form a grid structure, and the cover plate and the supporting plates are all made of stainless steel materials. The technical problem that in the prior art, a well lid is not easy to open can be solved.

Description

Technical Field

[0001] This application belongs to the field of municipal facilities, and in particular relates to a stainless steel escape manhole cover. Background Technology

[0002] In the construction of urban roads and underground pipe networks, manhole covers, as key facilities for sealing inspection wells and trench openings, play an important role in ensuring the safety of personnel passage and maintaining the normal operation of underground facilities. However, the traditional cast iron manhole covers currently in widespread use have significant defects due to their structural characteristics: on the one hand, the cast iron material makes the manhole covers too heavy, with a single manhole cover typically weighing up to 215 kilograms. Without mechanical assistance, it is difficult for a single person to open them, especially in emergency situations such as fires or toxic gas leaks in underground spaces, where trapped personnel often lose their chance to escape because they cannot open the manhole cover in time; on the other hand, to overcome the operational difficulties caused by the weight of the manhole covers, existing technologies mostly use electrically driven mechanical lifting devices or rely on ultra-high pressure air rods for assistance in opening. However, the former is at risk of complete failure when the power is interrupted, and the latter is prone to accidents caused by air rod ejection due to uncontrolled air pressure during operation, neither of which can provide reliable protection in emergency scenarios.

[0003] Therefore, it is necessary to solve the above-mentioned technical problems. Utility Model Content

[0004] The purpose of this application is to provide a stainless steel escape manhole cover to solve the technical problem that manhole covers are difficult to open in the prior art.

[0005] To achieve the above objectives, the technical solution adopted in this application is: to provide a stainless steel escape manhole cover, comprising:

[0006] The base forms an annular side plate, and also forms an annular intermediate plate connected to the inner side of the annular side plate and an annular bottom plate connected to the outer side of the annular side plate, wherein the annular intermediate plate and the annular bottom plate are both perpendicular to the annular side plate.

[0007] The cover body forms a cover plate adapted to the shape of the port of the annular side plate, and also forms a plurality of support plates vertically connected to the same side of the cover plate. The cover plate is hinged to the annular side plate and the support plates can abut against the annular intermediate plate during the rotation of the cover plate. The support plates have a preset height in the normal direction of the cover plate and can make the cover plate flush with the port of the annular side plate after abutting against the annular intermediate plate. The plurality of support plates form a grid structure and both the cover plate and the support plates are made of stainless steel.

[0008] Compared with the prior art, the beneficial effect of the stainless steel escape manhole cover provided in this application is that, in the stainless steel escape manhole cover provided in this application, the base is composed of annular side plates and annular intermediate plates and annular bottom plates vertically connected to both sides of the annular side plates. The cover body is composed of a cover plate adapted to the port shape of the annular side plates and a support plate vertically connected to the cover plate to form a grid structure. Since the grid-shaped support plate can make the cover plate flush with the port of the annular side plates when it abuts against the annular intermediate plate, it can also significantly reduce its own weight. Moreover, since the support plate and the cover plate themselves are made of lightweight stainless steel, the overall weight of the cover body is significantly reduced. Thus, the stainless steel escape manhole cover provided in this application can achieve the technical effect of easy opening, which is far superior to the prior art.

[0009] Optionally, several of the support plates extend in a first direction and a second direction respectively; the rotation center axis of the cover plate relative to the annular side plate is parallel to the first direction and perpendicular to the second direction. In this design, by setting the support plates to extend in mutually perpendicular first and second directions, not only can the weight of the cover be reduced to a greater extent, but also, since the second direction is parallel to the rotation center axis of the cover plate relative to the annular side plate, the structural strength of the support plates is significantly improved. This is beneficial for further improving the ease of opening of the stainless steel escape manhole cover in this application.

[0010] Optionally, a portion of the support plate extending along the second direction also forms an arch in the normal direction of the cover plate. This design increases the overall strength of the cover by setting a portion of the support plate in an arched structure, while also not excessively increasing the weight of the cover. This further improves the ease of opening the stainless steel escape manhole cover in this application.

[0011] Optionally, the stainless steel escape manhole cover further includes a pneumatic rod that provides assistance; the two ends of the pneumatic rod are respectively hinged to the annular side plate and the cover plate, and the rotation axis of the cover plate is parallel to the rotation axis of the pneumatic rod. In this solution, by adding an assistive pneumatic rod between the annular side plates, the ease of opening the stainless steel escape manhole cover in this application can be further improved.

[0012] Optionally, the stainless steel escape manhole cover further includes a lock capable of locking the cover plate onto the base; the cover plate is provided with a receiving groove for accommodating the lock. In this solution, by providing a receiving groove on the cover plate to accommodate the lock, the weight of the cover body can be further reduced, which is beneficial to further improving the ease of opening of the stainless steel escape manhole cover in this application.

[0013] Optionally, the stainless steel escape manhole cover further includes a first connecting plate vertically connected to the cover plate and a second connecting plate connected to the annular side plate and parallel to the first connecting plate; the two ends of the pneumatic rod are respectively hinged to the first connecting plate and the second connecting plate so that the pneumatic rod and the cover plate are spaced apart. In this solution, the first connecting plate connected to the cover plate and the second connecting plate connected to the annular side plate can make the posture of the pneumatic rod more convenient to assist in opening the cover, which is beneficial to further improve the ease of opening the stainless steel escape manhole cover in this application.

[0014] Optionally, the first connecting plate forms a triangle with its tip pointing towards the pneumatic rod, and a perforated hole is formed on the first connecting plate. In this design, by setting a triangular first connecting plate and creating a perforation on it, the structural strength of the first connecting plate can be improved, and the overall weight of the cover can be further reduced. This is beneficial for further improving the ease of opening of the stainless steel escape manhole cover in this application.

[0015] Optionally, the side of the cover plate facing away from the support plate has anti-slip texture. This design, by providing anti-slip texture on the cover plate, can significantly improve the safety of pedestrians and vehicles passing through in adverse weather conditions such as wetness and rain, which helps to give the stainless steel escape manhole cover of this application better safety performance.

[0016] Optionally, the stainless steel escape manhole cover also includes an angle sensor capable of detecting the rotation angle of the cover. In this solution, by setting an angle sensor to detect the rotation angle of the cover, workers can quickly ascertain the opening and closing status of the cover, thereby facilitating timely detection and handling of potential safety hazards. This helps to further improve the safety performance of the stainless steel escape manhole cover in this application.

[0017] Optionally, the base is further provided with a plurality of supporting ribs that are perpendicularly connected to the annular side plate and the annular bottom plate, respectively; the supporting ribs are evenly spaced along the annular direction of the annular side plate. In this design, by providing a plurality of supporting ribs between the annular side plate and the annular bottom plate, the structural strength of the stainless steel escape manhole cover in this application can be significantly improved. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the overall structure of the stainless steel escape manhole cover in the embodiments of this application. Figure 1 ;

[0020] Figure 2 This is a schematic diagram of the overall structure of the stainless steel escape manhole cover in the embodiments of this application. Figure 2 ;

[0021] Figure 3 This is a schematic diagram of the overall structure of the stainless steel escape manhole cover in the embodiments of this application. Figure 3 ;

[0022] Figure 4 This is a side view of the overall structure of the stainless steel escape manhole cover in the embodiment of this application;

[0023] Figure 5 This is a top view of the overall structure of the stainless steel escape manhole cover in the embodiment of this application.

[0024] The following are the labeling elements in the figure:

[0025] 100. Base; 101. Annular side plate; 102. Annular middle plate; 103. Annular bottom plate; 111. Second connecting plate; 112. Supporting rib plate; 200. Cover body; 201. Cover plate; 202. Support plate; 203. Receiving groove; 204. First connecting plate; 205. Hole; 206. Anti-slip texture; 300. Gas spring; 400. Lock. Detailed Implementation

[0026] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0027] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0028] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application 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. Therefore, they should not be construed as limitations on this application.

[0029] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0030] Please refer to the following: Figure 1 , Figure 2 and Figure 3 The present application provides a description of a stainless steel escape manhole cover according to an embodiment. The stainless steel escape manhole cover includes a base 100 and a cover body 200. Wherein:

[0031] The base 100 forms an annular side plate 101, an annular intermediate plate 102 connected to the inner side of the annular side plate 101, and an annular bottom plate 103 connected to the outer side of the annular side plate 101. The annular intermediate plate 102 and the annular bottom plate 103 are both perpendicular to the annular side plate 101. The cover 200 forms a cover plate 201 adapted to the shape of the port of the annular side plate 101, and also forms several support plates 202 vertically connected to the same side of the cover plate 201. The cover plate 201 is hinged to the annular side plate 101, and the support plates 202 can abut against the annular intermediate plate 102 during the rotation of the cover plate 201. The support plates 202 have a preset height in the normal direction of the cover plate 201 and can make the cover plate 201 flush with the port of the annular side plate 101 after abutting against the annular intermediate plate 102. The several support plates 202 form a grid structure, and both the cover plate 201 and the support plates 202 are made of stainless steel. In this embodiment, the base 100 is used to install at the target location, and the cover plate 201, which can rotate relative to the annular side plate 101, can realize the opening and closing of the manhole cover during rotation.

[0032] According to the structure provided in this embodiment, in the stainless steel escape manhole cover provided in this embodiment, the base 100 is composed of an annular side plate 101 and an annular intermediate plate 102 and an annular bottom plate 103 vertically connected to both sides of the annular side plate 101. The cover body 200 is composed of a cover plate 201 adapted to the port shape of the annular side plate 101 and a support plate 202 vertically connected to the cover plate 201 and forming a grid structure. Since the grid-shaped support plate 202 can make the cover plate 201 flush with the port of the annular side plate 101 when it abuts against the annular intermediate plate 102, it can also significantly reduce its own weight. Moreover, since the support plate 202 and the cover plate 201 are made of lightweight stainless steel, the overall weight of the cover body 200 is significantly reduced. Thus, the stainless steel escape manhole cover provided in this application can achieve the technical effect of easy opening, which is far superior to the prior art.

[0033] It is understood that, since the stainless steel cover plate 201 and support plate 202 in this embodiment can be welded to form the cover body 200, this process can solve the problem of product quality stability. Compared with the traditional casting process that relies on molds, the stainless steel welding process is not affected by factors such as mold corrosion, and can ensure the consistency of product quality. In addition, in the specific implementation process, the annular side plate 101 can be formed into shapes commonly used in the art, such as square rings, rectangular rings, or circular rings, with the same technical effect. For ease of explanation, this embodiment and other embodiments of this application use a rectangular ring as an example for the annular side plate 101. Similarly, the grid formed by the support plate 202 in this embodiment can be set as a rectangular grid, square grid, or rhomboid grid structure commonly used in the art. In actual production, it can be flexibly customized according to specific circumstances, which will not be elaborated here.

[0034] In another embodiment of this application, please refer to [the relevant document / reference]. Figure 1 , Figure 2 and Figure 3 Several support plates 202 extend in a first direction and a second direction respectively; the rotation center axis of the cover plate 201 relative to the annular side plate 101 is parallel to the first direction and perpendicular to the second direction. For ease of explanation, in this embodiment, the first direction and the second direction are respectively referred to as the support plates. Figure 3 Let's take the x and y directions in the diagram as examples to illustrate.

[0035] According to the structure provided in this embodiment, by setting the support plate 202 to extend in the first and second directions that are perpendicular to each other, the weight of the cover 200 can be reduced to a greater extent. Moreover, since the first direction is also parallel to the rotation center axis of the cover plate 201 relative to the annular side plate 101, the structural strength of the support plate 202 will also be significantly improved. This is conducive to further improving the ease of opening of the stainless steel escape manhole cover in this embodiment.

[0036] It is understood that in this embodiment, the support plate 202 extending in the second direction significantly improves the structural strength of the cover 200 by being perpendicular to the rotation center axis of the cover plate 201 relative to the annular side plate 101. In other embodiments of this application, the second direction can also be set at an angle to the first direction, which can also achieve similar technical effects to this embodiment to a certain extent, and will not be elaborated further here.

[0037] In another embodiment of this application, please refer to [the relevant document / reference]. Figure 1 , Figure 2 and Figure 3 The portion of the support plate 202 extending along the second direction also forms an arch in the normal direction of the cover plate 201.

[0038] According to the structure provided in this embodiment, this embodiment increases the overall strength of the cover 200 by setting part of the support plate 202 as an arched structure, while not increasing the weight of the cover 200 too much. This is beneficial to further improve the ease of opening of the stainless steel escape manhole cover in this application.

[0039] It is understood that the degree of arching of some support plates 202 in this embodiment is not limited, and can be flexibly set according to the structural strength design requirements of the cover 200 during actual production. Furthermore, in some other embodiments of this application, all support plates 202 extending in the second direction can be configured with an arched structure, which can further improve the structural strength of the cover 200 but will also significantly increase its weight; this can be flexibly set during implementation. In a preferred embodiment, the support plates 202 forming the arched structure can also be evenly spaced in the first direction, which helps to make the overall structure of the stainless steel escape manhole cover in this embodiment more uniform.

[0040] In another embodiment of this application, please refer to [the relevant document / reference]. Figure 3 , Figure 4 and Figure 5 The stainless steel escape manhole cover also includes a pneumatic rod 300 that provides assistance. The two ends of the pneumatic rod 300 are hinged to an annular side plate 101 and a cover plate 201, respectively. The rotation axis of the cover plate 201 is parallel to the rotation axis of the pneumatic rod 300. The pneumatic rod 300 described in this embodiment is a commonly used assistive device in the art. It can generate elastic force through the movement of a piston rod and significantly reduce the human effort required to open the manhole cover. In specific implementations, the pneumatic rod 300 can be flexibly selected based on the weight of the cover body 200.

[0041] According to the structure provided in this embodiment, by adding an assistive pneumatic rod 300 between the annular side plate 101 and the support plate 202, the ease of opening the stainless steel escape manhole cover in this embodiment can be further improved. It should also be noted that since the cover plate 201 and support plate 202 in this embodiment are welded from stainless steel and the support plate 202 also forms a grid structure, the weight of the cover 200 is significantly reduced. Therefore, the pneumatic rod 300 in this embodiment can be selected as a model with lower elasticity. Specifically, according to laboratory calculation data in this embodiment, the weight of the cover 200 in this embodiment can be reduced from 215 kg of traditional castings to 116 kg. Regarding the force required for opening, the pneumatic rod 300 selected for the cover 200 in this embodiment has an elasticity of 2113 N, which is far lower than the 4300 N pneumatic rod used in traditional castings. This makes the stainless steel escape manhole cover provided in this embodiment not only reduce the external force required to open the cover 200, but also avoid the safety risks caused by the use of ultra-high pressure air rods, greatly improving the safety and convenience of the manhole cover in actual use.

[0042] In another embodiment of this application, please refer to [the relevant document / reference]. Figure 3 , Figure 4 and Figure 5 The stainless steel escape manhole cover also includes a lock 400 capable of locking the cover plate 201 and the cover body 200 onto the base 100; the cover plate 201 is provided with a receiving groove 203 for accommodating the lock 400. The lock 400 described in this embodiment is a commonly used lock 400 in the art for locking the cover body 200 onto the base 100. It can ensure that the cover body 200 can be opened quickly and safely in an emergency, and can also ensure the stability of the cover body 200 under normal conditions. It can be flexibly selected as needed in actual production.

[0043] According to the structure provided in this embodiment, by providing a receiving groove 203 on the cover plate 201 to accommodate the lock 400, the weight of the cover body 200 can be further reduced, which is beneficial to further improving the ease of opening of the stainless steel escape manhole cover in this application. In addition, providing a receiving groove 203 on the cover plate 201 can also keep the surface of the cover body 200 away from the support plate 202 flat, which can effectively prevent pedestrians from tripping over the stainless steel escape manhole cover in this embodiment, which is also beneficial to further improving the safety performance of the stainless steel escape manhole cover in this embodiment.

[0044] In another embodiment of this application, please refer to [the relevant document / reference]. Figure 1 , Figure 2 and Figure 3The stainless steel escape manhole cover also includes a first connecting plate 204 vertically connected to the cover plate 201 and a second connecting plate 111 connected to the annular side plate 101 and parallel to the first connecting plate 204; the two ends of the pneumatic rod 300 are respectively hinged to the first connecting plate 204 and the second connecting plate 111 so that the pneumatic rod 300 and the cover plate 201 are spaced apart.

[0045] According to the structure provided in this embodiment, the first connecting plate 204 connected to the cover plate 201 and the second connecting plate 111 connected to the annular side plate 101 can make the posture of the air pressure rod 300 more convenient to assist in opening the cover 200, which is conducive to further improving the ease of opening of the stainless steel escape manhole cover in this embodiment.

[0046] It is understood that the shapes of the first connecting plate 204 and the second connecting plate 111 in this embodiment are not limited, and can be selected as square, rectangular or polygonal shapes commonly used in the art. As a preferred embodiment, the first connecting plate 204 and the second connecting plate 111 in this embodiment can also be set parallel to the output direction of the pneumatic rod 300, so as to provide more stable support for the pneumatic rod 300.

[0047] In another embodiment of this application, please refer to [the relevant document / reference]. Figure 1 , Figure 2 and Figure 3 The first connecting plate 204 forms a triangle with its tip facing the air pressure rod 300, and a hollow hole 205 is formed on the first connecting plate 204.

[0048] According to the structure provided in this embodiment, the first connecting plate 204, by being set in a triangular shape, can utilize the stability of a triangle to provide more stable support for the pneumatic rod 300. Furthermore, the perforated holes 205 provided in the first connecting plate 204 can effectively reduce the weight of the first connecting plate 204, thereby also effectively reducing the weight of the cover 200. This is beneficial to further improving the ease of opening of the stainless steel escape manhole cover in this application.

[0049] It is understood that the shape of the perforated hole 205 in this embodiment can be set to a shape commonly used in the art, such as a round hole, a square hole, or a polygonal hole. Furthermore, the number of perforated holes 205 is not limited and can be flexibly set to one or more according to actual production needs. For ease of explanation, this embodiment uses a perforated hole 205 on the first connecting plate 204 as an example.

[0050] In another embodiment of this application, please refer to [the relevant document / reference]. Figure 1 , Figure 2 and Figure 3The cover plate 201 has anti-slip texture 206 formed on the side opposite to the support plate 202. It is understood that the shape of the anti-slip texture 206 in this embodiment is not limited, and can be selected as an anti-slip structure commonly used in the art, which will not be described in detail here.

[0051] According to the structure provided in this embodiment, by providing anti-slip texture 206 on the cover plate 201, the safety of pedestrians and vehicles passing through under adverse weather conditions such as wetness and rain can be significantly improved, which helps to make the stainless steel escape manhole cover in this embodiment have better safety performance.

[0052] In another embodiment of this application, please refer to [the relevant document / reference]. Figure 1 , Figure 2 and Figure 3 The stainless steel escape manhole cover also includes an angle sensor (not shown in the attached diagram) capable of detecting a 200° rotation angle of the cover.

[0053] According to the structure provided in this embodiment, by setting an angle sensor to detect the rotation angle of the cover 200, workers can quickly know the opening and closing status of the cover 200, thereby facilitating timely detection and handling of safety hazards of the manhole cover. This helps to further improve the safety performance of the stainless steel escape manhole cover in this embodiment.

[0054] It is understood that the angle sensor described in this embodiment can also be replaced by a pressure sensor that can detect pressure and a displacement sensor that can detect displacement, so that staff can also know the status of the manhole cover through the corresponding detection data, such as whether it has been opened abnormally or whether it has been displaced, which can effectively ensure the safety performance of the stainless steel escape manhole cover in this embodiment.

[0055] In another embodiment of this application, please refer to [the relevant document / reference]. Figure 1 , Figure 2 and Figure 3 The base 100 also has a number of supporting ribs 112 that are vertically connected to the annular side plate 101 and the annular bottom plate 103 respectively; the supporting ribs 112 are evenly spaced along the annular direction of the annular side plate 101.

[0056] According to the structure provided in this embodiment, by setting a number of supporting ribs 112 between the annular side plate 101 and the annular bottom plate 103, the structural strength of the stainless steel escape manhole cover in this embodiment can be significantly improved, which is also beneficial to significantly extend its service life.

[0057] It is understood that the shape of the support plate 202 in this embodiment is not limited, and can be selected as a triangle, rectangle, or polygon shape commonly used in the art. As a preferred embodiment, this embodiment will be described using a triangle as an example.

[0058] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A stainless steel escape well lid characterized by, include: The base forms an annular side plate, and also forms an annular intermediate plate connected to the inner side of the annular side plate and an annular bottom plate connected to the outer side of the annular side plate, wherein the annular intermediate plate and the annular bottom plate are both perpendicular to the annular side plate. The cover body forms a cover plate adapted to the shape of the port of the annular side plate, and also forms a plurality of support plates vertically connected to the same side of the cover plate. The cover plate is hinged to the annular side plate and the support plates can abut against the annular intermediate plate during the rotation of the cover plate. The support plates have a preset height in the normal direction of the cover plate and can make the cover plate flush with the port of the annular side plate after abutting against the annular intermediate plate. The plurality of support plates form a grid structure and both the cover plate and the support plates are made of stainless steel.

2. The stainless steel escape manhole cover as described in claim 1, characterized in that: The plurality of the support plates extend in a first direction and a second direction, respectively; The rotation center axis of the cover plate relative to the annular side plate is parallel to the first direction and perpendicular to the second direction.

3. The stainless steel escape manhole cover as described in claim 2, characterized in that: The portion of the support plate extending along the second direction also forms an arch in the normal direction of the cover plate.

4. The stainless steel escape manhole cover as described in any one of claims 1-3, characterized in that: The stainless steel escape manhole cover also includes a pneumatic rod that can provide assistance; The two ends of the pneumatic rod are respectively hinged to the annular side plate and the cover plate, and the rotation center axis of the cover plate is parallel to the rotation center axis of the pneumatic rod.

5. The stainless steel escape manhole cover as described in claim 4, characterized in that: The stainless steel escape manhole cover also includes a locking device that can lock the cover plate body onto the base; The cover plate is provided with a receiving groove for accommodating the lock.

6. The stainless steel escape manhole cover as described in claim 4, characterized in that: The stainless steel escape manhole cover also includes a first connecting plate vertically connected to the cover plate and a second connecting plate connected to the annular side plate and parallel to the first connecting plate. The two ends of the pneumatic rod are respectively hinged to the first connecting plate and the second connecting plate so that the pneumatic rod and the cover plate are spaced apart.

7. The stainless steel escape manhole cover as described in claim 6, characterized in that: The first connecting plate forms a triangle with its tip pointing towards the air pressure rod, and a hollow hole is formed on the first connecting plate.

8. The stainless steel escape manhole cover as described in claim 1, characterized in that: The cover plate has anti-slip textured edges on the side opposite to the support plate.

9. The stainless steel escape manhole cover as described in claim 1, characterized in that: The stainless steel escape manhole cover also includes an angle sensor capable of detecting the rotation angle of the cover.

10. The stainless steel escape manhole cover as described in claim 1, characterized in that: The base is also formed with several supporting ribs that are vertically connected to the annular side plate and the annular bottom plate, respectively. The supporting stiffeners are evenly spaced along the annular direction of the annular side plate.

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