Drainage rescue device capable of being used in urban flood situation

Abstract

The invention discloses a drainage rescue device capable of being used in an urban flood situation. The drainage rescue device comprises a well lid base, a well lid frame, a gravity driving part, a plurality of well lid bodies and ejector rods arranged between the well lid bodies and the gravity driving part. Wherein drain holes are formed in the well lid body; a water storage tank with an upward opening is formed in the gravity driving part, and a drainage notch is formed in the lower end of the water storage tank; the water storage tank is positioned below the drainage hole; the gravity driving part is hung at the outer end of the ejector rod, the middle of the ejector rod is movably connected to the well lid frame, the inner end of the ejector rod abuts against the lower end of the well lid body, and the well lid frame is connected with the well lid body through a rope. The drainage rescue device can automatically drain water in time according to the size of rainwater flow, is very convenient to use, and can provide self-rescue conditions for people falling into water when the rainwater level is deep, so that the probability that the people falling into water are in distress is reduced to a great extent, and the functional requirements in specific disastrous weather are met.

Description

Technical Field

[0001] The present invention relates to the technical field of manhole covers, and in particular to a drainage rescue device that can be used in urban flood situations. Background Art

[0002] Manhole covers are used to cover road wellheads to prevent people or objects from falling into deep wells. They are widely used in urban underground pipe networks, especially urban sewage systems. Existing manhole covers are mainly round and square, and the manhole covers are used to drain water by setting drainage holes. When flooding occurs in the city, drainage is achieved through the drainage holes in the manhole covers. In the existing technology, the drainage holes on the manhole covers are relatively small and can meet the drainage needs of ordinary rainy weather. During heavy rain and extremely heavy rain, cities are prone to waterlogging. The drainage holes on the manhole covers cannot drain water in time, which aggravates the waterlogging. In order to drain water as soon as possible, staff need to manually lift the manhole covers for drainage, which is cumbersome to operate, has low safety, and is very inconvenient to use. Existing manhole covers cannot meet the functional requirements in specific catastrophic weather. Summary of the Invention

[0003] The purpose of the present invention is to overcome the above-mentioned problems and provide a drainage rescue device that can be used in urban flood situations. The drainage rescue device can automatically drain water in a timely manner according to the size of the rainwater flow. It is very convenient to use. When the rainwater level is deep, it can also provide conditions for self-rescue for people who fall into the water, greatly reducing the probability of people who fall into the water being killed, and meeting the functional requirements in specific catastrophic weather.

[0004] The purpose of the present invention is achieved through the following technical solutions:

[0005] A drainage rescue device that can be used in urban flood situations includes a manhole cover seat, a manhole cover frame arranged on the manhole cover seat, a gravity drive member arranged inside the manhole cover seat, a plurality of manhole cover bodies arranged on the manhole cover frame and distributed in a circumferential direction, and a top rod arranged between each manhole cover body and the gravity drive member; wherein, the manhole cover body is provided with a drainage hole; the gravity drive member is provided with a water storage tank opening upward, and the lower end of the water storage tank is provided with a drainage notch; the water storage tank is located below the drainage hole; the gravity drive member is suspended at the outer end of the top rod, the middle part of the top rod is movably connected to the manhole cover frame, the inner end of the top rod is against the lower end of the manhole cover body, and the manhole cover frame and the manhole cover body are connected by a rope.

[0006] The working principle of the drainage rescue device that can be used in urban flooding situations is as follows:

[0007] During rainy weather, rainwater flows into the water storage tank on the gravity drive component through the drainage holes on the manhole cover body, and then enters the sewer through the drainage groove. When the rainfall is small, the water can be drained out through the drainage groove. When the rainfall becomes heavier, as more and more water enters the water storage tank, it cannot be drained out in time through the drainage groove. As the amount of rain increases, the gravity of the gravity drive component gradually increases. Under the action of gravity, the gravity drive component moves downward, driving the top rod to swing, and the outer end of the top rod swings downward, and the inner end of the top rod will tilt upward and push the inner side of the manhole cover body upward. Rainwater can enter the sewer through the gap between the manhole cover body and the manhole cover frame, and the accumulated water on the road surface can be quickly drained, and automatic drainage is achieved according to the amount of rainwater. After the rainwater is basically drained, it automatically resets under the action of the gravity of the manhole cover body, and the cover is closed on the manhole cover frame, and the top rod and the gravity drive component are also reset.

[0008] During heavy rain or flooding, if the water on the road exceeds a certain depth, the internal pressure in the manhole will push the gravity-driven element upward, causing the inner end of the push rod to tilt upward, pushing the manhole cover out of the manhole cover frame. The manhole cover then floats and disperses with the rain on the road, and is pulled by the rope to float within a certain range. When flood victims pass by the drainage rescue device, they have the opportunity to grab the manhole cover and avoid being swept away by the floodwaters, providing them with a way to save themselves and greatly reducing the probability of death.

[0009] In a preferred embodiment of the present invention, there are multiple drainage notches, and the total drainage area of ​​the multiple drainage holes is greater than the total drainage area of ​​the multiple drainage notches. This is intended to facilitate storage of rainwater in a water storage tank when the drainage notches are insufficient to drain the road surface. This increases the gravity of the gravity-driven element, providing power for opening the manhole cover. This simplifies the structure, eliminates the need for additional power sources, and reduces costs.

[0010] Preferably, the inner end of the top rod is provided with a snap-back portion that bends outward and obliquely upward, and the bottom surface of the manhole cover is provided with a mating groove that cooperates with the snap-back portion. In the above structure, the provision of the snap-back portion and the mating groove prevents the manhole cover from separating from the snap-back portion during drainage, thereby achieving a certain positioning and locking effect. When the rainwater exceeds a certain depth, the mating groove of the manhole cover and the snap-back portion can separate.

[0011] Preferably, the gravity-driven member is provided with a plurality of lifting lugs, each corresponding to a mandrel, and the gravity-driven member is suspended from the outer end of the mandrel via the lifting lugs. The provision of multiple lifting lugs ensures a more stable suspension of the gravity-driven member and a more balanced force. When rainwater accumulates in the water storage tank to a certain level, the gravity-driven member moves downward, simultaneously driving the plurality of mandrels to swing, thereby lifting the inner sides of all manhole covers and enhancing drainage efficiency.

[0012] Preferably, the lifting eye is provided with a lifting hole, and the outer end of the top rod is provided with a positioning groove, and the lifting hole is suspended in the positioning groove. By providing the positioning groove, it is easy to position the lifting eye, prevent the gravity drive member from shifting, and ensure the stability of the suspension.

[0013] Preferably, the outer end of the mandrel is provided with an anti-detachment hook to prevent the lifting lug from detaching, and the anti-detachment hook is bent upward. By providing the anti-detachment hook, when the gravity-driven component moves up and down, the lifting lug can be prevented from detaching from the mandrel, and in conjunction with the positioning groove, the stability of the gravity-driven component suspension is further improved.

[0014] Preferably, the manhole cover frame includes a main frame mounted on the manhole cover seat and a sub-frame arranged at the lower end of the main frame. The manhole cover body is arranged on the main frame. The sub-frame is provided with a hinge hole at a position corresponding to the top rod, and the middle portion of the top rod is hinged to the hinge hole. By providing the main frame, the installation of the manhole cover body is facilitated, and by providing the sub-frame, the installation of the top rod is facilitated. The combination of the main frame and the sub-frame can play a blocking role. When the manhole cover body is separated from the manhole cover frame, the main frame and the sub-frame can prevent the person who falls into the water from falling, while also ensuring the drainage effect.

[0015] Preferably, the sub-frame includes an upper frame and a lower frame arranged at the lower end of the upper frame, the bottom of the upper frame is provided with an upper arc-shaped groove opening downward, the upper portion of the lower frame is provided with a lower arc-shaped groove opening upward, the upper arc-shaped groove and the lower arc-shaped groove forming the hinge hole; the upper end of the middle portion of the push rod is provided with an upper arc-shaped protrusion, the lower end of the middle portion of the push rod is provided with a lower arc-shaped protrusion, the upper arc-shaped groove and the upper arc-shaped protrusion cooperate with each other, and the lower arc-shaped groove cooperates with the lower arc-shaped protrusion. The sub-frame is provided in a split manner, through the upper frame and the lower frame, in order to facilitate the installation of the push rod.

[0016] Preferably, the lower frame is provided with a limit rod at a position corresponding to the lifting ear, the inner end of the limit rod is fixedly connected to the outer side wall of the lower frame, and the outer end of the limit rod extends outward from the lifting hole. The purpose is that when the gravity-driven component moves downward to a certain extent, the lifting ear will be blocked by the limit rod. The lifting ear is suspended on the limit rod and the manhole, which can prevent the manhole from swinging too much and play a limiting role, so that the swing angle of the manhole will not exceed 40 degrees. If the swing angle of the manhole cover is too large, the height of the manhole cover will be too high, which will make it difficult or relatively difficult to reset the manhole cover. At the same time, when the rain is too heavy, the limit rod can also prevent the gravity-driven component from falling off, so that the drainage rescue device is suitable for drainage with large water flow.

[0017] Preferably, the upper surface of the manhole cover is provided with a reflective mark. By providing the reflective mark, pedestrians can notice the manhole cover under the illumination of light at night, thereby reminding them to pay attention to danger and stay away from the vicinity of the sewer.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. The drainage rescue device of the present invention can be used in urban flood situations. By setting a gravity driving part, when the rainfall becomes heavier, more and more water enters the water storage tank, and cannot be discharged in time through the drainage notch, the gravity driving part gradually increases with the amount of rain, and the gravity driving part moves downward under the action of gravity, driving the top rod to swing, the outer end of the top rod swings downward, and the inner end of the top rod will tilt upward and push up the inner side of the manhole cover body. After the manhole cover body is lifted up, rainwater can enter the sewer through the gap between the manhole cover body and the manhole cover frame, and the accumulated water on the road surface can be quickly drained. Automatic drainage is achieved according to the amount of rainwater, which is very convenient to use and highly safe.

[0020] 2. The drainage rescue device of the present invention can be used in urban flood situations. When the rainwater level is deep, the manhole cover will separate from the manhole cover frame, and the manhole cover will float and scatter with the rain on the road. The manhole cover is pulled by a rope and floats within a certain range. If a person who falls into the water is accidentally washed away by the rain, he or she can have the opportunity to grab the manhole cover when passing by the drainage rescue device, providing the person with the conditions for self-rescue, thereby greatly reducing the probability of the person falling into the water being killed. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 The figure is a schematic diagram of the three-dimensional structure of a drainage rescue device that can be used in urban flooding situations according to the present invention.

[0022] Figure 2 This is a schematic diagram of the three-dimensional structure of the drainage rescue device in the present invention from another viewing angle.

[0023] Figure 3 This is an exploded view of the drainage rescue device of the present invention.

[0024] Figure 4 It is a cross-sectional view of the drainage rescue device in the present invention.

[0025] Figure 5 It is a three-dimensional structural diagram of part of the structure of the drainage rescue device in the present invention.

[0026] Figure 6 It is a schematic diagram of the three-dimensional structure of the gravity drive component in the present invention.

[0027] Figure 7 It is a schematic diagram of the three-dimensional structure of the manhole cover body in the present invention.

[0028] Figure 8 It is a structural schematic diagram of the push rod in the present invention.

[0029] Figure 9 It is a schematic diagram of the three-dimensional structure of the manhole cover frame in the present invention.

[0030] Figure 10 It is a schematic diagram of the three-dimensional structure of the lower frame in the present invention.

[0031] Figure 11 It is a schematic diagram of the three-dimensional structure of the upper frame in the present invention.

[0032] Figure 12 It is a structural schematic diagram of the drainage rescue device of the present invention when in use. DETAILED DESCRIPTION

[0033] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the present invention will be further described below in conjunction with embodiments and drawings, but the embodiments of the present invention are not limited thereto.

[0034] See also Figures 1-12 The present embodiment discloses a drainage rescue device that can be used in urban flood situations, including a manhole cover seat 1, a manhole cover frame 2 arranged on the manhole cover seat 1, a gravity driving member 3 arranged inside the manhole cover seat 1, a manhole cover body 4 arranged on the manhole cover frame 2 and evenly distributed along the circumferential direction, and a top rod 5 arranged between each manhole cover body 4 and the gravity driving member 3; wherein, the manhole cover body 4 is provided with a drainage hole 4-1; the gravity driving member 3 is provided with a water storage tank 3-1 opening upward, and the lower end of the water storage tank 3-1 is provided with a drainage notch 3-2; the water storage tank 3-1 is located below the drainage hole 4-1; the gravity driving member 3 is suspended at the outer end of the top rod 5, the middle part of the top rod 5 is movably connected to the manhole cover frame 2, the inner end of the top rod 5 is against the lower end of the manhole cover body 4, and the manhole cover frame 2 and the manhole cover body 4 are connected by a rope.

[0035] See also Figures 1-12 The manhole cover base 1, the manhole cover frame 2, and the gravity drive member 3 are coaxially arranged. The manhole cover base 1 is annular and has a stepped groove formed therein. The manhole cover frame 2 snaps onto the stepped groove. The manhole cover base 1 and the manhole cover frame 2 are both made of cast iron, the gravity drive member 3 is made of steel, and the manhole cover body 4 is made of a composite material. The drainage rescue device of this embodiment is a securely connected kit installed on the manhole of a sewer, effectively preventing the drainage rescue device from being washed away and lost by floodwaters.

[0036] See also Figures 1-12The gravity-driven member 3 is an annular gravity-driven member, and the water storage tank 3-1 is an annular water storage tank 3-1. The water storage tank 3-1 is located directly below the drain hole 4-1, ensuring that water from the drain hole 4-1 can flow into the water storage tank 3-1. The outer diameter of the gravity-driven member 3 is smaller than the inner diameter of the manhole cover base 1. When the water level is high and the manhole cover body 4 is detached, water can flow into the sewer through the channel in the center of the gravity-driven member 3 and the gap between the manhole cover base 1 and the gravity-driven member 3.

[0037] See also Figures 1-12 One end of the rope is installed on the manhole cover frame 2 and fixedly connected, and then the manhole cover frame 2 is buckled on the annular manhole cover seat. The manhole cover seat 1 is firmly connected to the manhole cover frame 2 and needs to be taken vertically by special tools. The bottom of the manhole cover body 4 is provided with a reinforcement structure (reinforcement ribs), and the reinforcement structure (reinforcement ribs) is provided with two rows of through holes. The other end of the rope is installed on the manhole cover frame 2 after passing through the two rows of the same through holes in turn, so that each manhole cover body 4 is connected to the manhole cover frame 2 by two ropes. After the manhole cover body 4 is separated from the manhole cover frame 2, the rope prevents the manhole cover body 4 from being washed away, ensuring sufficient strength during rescue. When the manhole cover body 4 is covered on the manhole cover frame 2, the rope will be installed along the trend of the reinforcement structure and stored in the slot in the reinforcement structure. When the manhole cover body 4 floats on the water surface, the rope will be slowly pulled out of the slot of the reinforcement structure under the influence of the water flow during the floating process of the cover body.

[0038] See also Figures 1-12 The number of drainage notches 3-2 is multiple, and the total drainage area of ​​the multiple (all) drainage holes 4-1 is greater than the total drainage area of ​​the multiple (all) drainage notches 3-2. This is intended to store rainwater in the water storage tank 3-1 when the road surface is flooded and cannot be drained away promptly through the drainage notches 3-2. This increases the gravity of the gravity-driven member 3, providing power for opening the manhole cover 4. This simplifies the structure, eliminates the need for other power sources, and reduces costs.

[0039] See also Figures 1-12 The inner end of the top rod 5 is provided with a snap-back portion 5-1 that bends outward and obliquely upward, and the bottom surface of the manhole cover body 4 is provided with a mating groove 4-2 that cooperates with the snap-back portion 5-1. In the above structure, the provision of the snap-back portion 5-1 and the mating groove 4-2 ensures that the manhole cover body 4 will not separate from the snap-back portion 5-1 during drainage, thus playing a certain positioning and locking role. When the rainwater exceeds a certain depth, the mating groove 4-2 of the manhole cover body 4 and the snap-back portion 5-1 can be separated.

[0040] See also Figures 1-12The gravity-driven member 3 is provided with a plurality of lifting lugs 6, which are arranged one-to-one with the mandrels 5. The gravity-driven member 3 is suspended from the outer end of the mandrel 5 by the lifting lugs 6. The provision of multiple lifting lugs 6 ensures that the gravity-driven member 3 is suspended more stably and the force is more balanced. When the rainwater in the water storage tank 3-1 reaches a certain level, the gravity-driven member 3 moves downward and drives the plurality of mandrels 5 to swing, thereby lifting the inner side of all the manhole covers 4 and enhancing the drainage effect.

[0041] See also Figures 1-12 The number of the manhole cover bodies 4 is 3, each of which is provided with 2 drainage holes 4-1, and the number of the lifting ears 6, drainage grooves 3-2 and top rods 5 are all 3.

[0042] See also Figures 1-12 The lifting eye 6 is provided with a lifting hole 6-1, and the outer end of the top rod 5 is provided with a positioning groove 5-2, and the lifting hole 6-1 is suspended in the positioning groove 5-2. The positioning groove 5-2 facilitates the positioning of the lifting eye 6, prevents the gravity drive member 3 from shifting, and ensures the stability of the suspension.

[0043] See also Figures 1-12 The outer end of the mandrel 5 is provided with an anti-detachment hook 5-3 to prevent the lifting lug 6 from detaching. The anti-detachment hook 5-3 is bent upward. The anti-detachment hook 5-3 prevents the lifting lug 6 from detaching from the mandrel 5 when the gravity-driven component 3 moves up and down, and cooperates with the positioning groove 5-2 to further improve the suspension stability of the gravity-driven component 3.

[0044] See also Figures 1-12 The manhole cover frame 2 includes a main frame 2-1 installed on the manhole cover seat 1 and a sub-frame 2-2 provided at the lower end of the main frame 2-1. The manhole cover body 4 is provided on the main frame 2-1. The sub-frame 2-2 is provided with a hinge hole 2-23 at a position corresponding to the top rod 5. The middle part of the top rod 5 is hinged to the hinge hole 2-23. By providing the main frame 2-1, it is convenient to install the manhole cover body 4. By providing the sub-frame 2-2, it is convenient to install the top rod 5. The combination of the main frame 2-1 and the sub-frame 2-2 can play a blocking role. When the manhole cover body 4 is separated from the manhole cover frame 2, the main frame 2-1 and the sub-frame 2-2 can prevent the person who falls into the water from falling, and at the same time can ensure the drainage effect.

[0045] See also Figures 1-12The main frame 2-1 is provided with three mounting openings 2-11, which cooperate with the manhole cover body 4. These mounting openings 2-11 are tapered openings, larger at the top and smaller at the bottom, allowing for a secure and tight connection to the manhole cover body 4. The outer diameter of the sub-frame 2-2 is smaller than that of the main frame 2-1, which is also smaller than the inner diameter of the gravity-driven member 3. The manhole cover frame 2 is a frame structure that facilitates drainage while also providing a certain degree of protection against falling objects.

[0046] See also Figures 1-12 The sub-frame 2-2 includes an upper frame 2-21 and a lower frame 2-22 arranged at the lower end of the upper frame 2-21. The bottom of the upper frame 2-21 is provided with an upper arc-shaped groove 2-211 opening downward, and the upper part of the lower frame 2-22 is provided with a lower arc-shaped groove 2-221 opening upward. The upper arc-shaped groove 2-211 and the lower arc-shaped groove 2-221 constitute the hinge hole 2-23. The upper end of the middle part of the push rod 5 is provided with an upper arc-shaped protrusion 4-35-4, and the lower end of the middle part of the push rod 5 is provided with a lower arc-shaped protrusion 4-35-5. The upper arc-shaped groove 2-211 and the upper arc-shaped protrusion 4-35-4 cooperate with each other, and the lower arc-shaped groove 2-221 cooperates with the lower arc-shaped protrusion 4-35-5. The sub-frame 2-2 is set up in a split manner, through the upper frame 2-21 and the lower frame 2-22, its purpose is to facilitate the installation of the push rod 5.

[0047] See also Figures 1-12 The lower frame 2-22 is provided with a limiting rod 2-222 at a position corresponding to the lifting lug 6. The inner end of the limiting rod 2-222 is fixedly connected to the outer wall of the lower frame 2-22, and the outer end of the limiting rod 2-222 extends outward from the lifting hole 6-1. The purpose is that when the gravity-driven component 3 moves downward to a certain extent, the lifting lug 6 will be blocked by the limiting rod 2-222. The lifting lug 6 is suspended on the limiting rod 2-222 and the mandrel 5, thereby preventing the mandrel 5 from swinging too much and playing a limiting role. The swing angle of the manhole cover 4 does not exceed 40 degrees. If the swing angle of the manhole cover 5 is too large, the manhole cover 4 will be ejected too high, making it difficult or relatively difficult to reset the manhole cover 4. At the same time, when the rain is too heavy, the limiting rod 2-222 can also prevent the gravity-driven component 3 from falling off, making the drainage rescue device suitable for large water flow drainage.

[0048] See also Figures 1-12 The outer end of the limiting rod 2-222 is provided with a recess 2-223, which facilitates the positioning of the lifting lug 6. When the gravity-driven member 3 moves downward to a certain extent, it can lock the lifting lug 6 to prevent it from loosening. The upper frame 2-21, the lower frame 2-22 and the main frame 2-1 are coaxially arranged and fixed by intermediate bolts.

[0049] See also Figures 1-12 The push rod 5 and the limiting rod 2-222 are respectively distributed on both sides of the hanging hole 6-1, and the push rod 5 and the limiting rod 2-222 do not overlap in the vertical direction. This ensures that the push rod 5 does not interfere with the limiting rod 2-222 when it moves.

[0050] See also Figures 1-12 The upper surface of the manhole cover body 4 is provided with a reflective mark 7. By setting the reflective mark 7, pedestrians can notice the manhole cover body 4 under the illumination of light at night, thereby reminding them to pay attention to danger and stay away from the surrounding area of ​​the sewer.

[0051] See also Figures 1-12 The reflective mark 7 is a plurality of reflective strips. After the reflective strips are installed, they are lower than the upper surface of the manhole cover body 4. The upper surface of the manhole cover body 4 is provided with a protrusion 4-3. Its purpose is to play a certain deceleration role when the car passes by the drainage rescue device; at the same time, these protrusions 4-3 also prevent some large areas of debris such as leaves and plastic bags from completely draining out of the drainage hole 4-1 to a certain extent when the manhole cover body 4 is draining.

[0052] See also Figures 1-12 The working principle of the drainage rescue device that can be used in urban flooding situations is as follows:

[0053] When it rains, rainwater flows into the water storage tank 3-1 on the gravity drive member 3 through the drainage hole 4-1 on the manhole cover body 4, and then enters the sewer through the drainage slot 3-2. When the rainfall is small, the water can be drained out through the drainage slot 3-2. When the rainfall becomes heavier, as more and more water enters the water storage tank 3-1, it cannot be drained out in time through the drainage slot 3-2. As the amount of rain increases, the gravity drive member 3 gradually increases with the amount of rain. Under the action of gravity, the gravity drive member 3 moves downward, driving the top rod 5 to swing. The outer end of the top rod 5 swings downward, and the inner end of the top rod 5 will tilt upward and push the inner side of the manhole cover body 4 upward. After the manhole cover body 4 is lifted up, rainwater can enter the sewer through the gap between the manhole cover body 4 and the manhole cover frame 2. The accumulated water on the road surface can be quickly drained, and automatic drainage is achieved according to the size of the rainwater. After the rainwater is basically drained, the manhole cover body 4 automatically resets under the action of gravity, covers the manhole cover frame 2, and the top rod 5 and the gravity drive member 3 are also reset.

[0054] When encountering heavy rain or flooding, the rainwater on the road exceeds a certain depth, causing a flood disaster. Specifically, when the rainwater on the road exceeds one meter from the drainage rescue device, the internal pressure in the well will push the gravity drive member 3 upward, and the inner end of the push rod 5 will tilt upward, pushing the manhole cover 4 out of the manhole cover frame 2. The manhole cover 4 will float and disperse with the rainwater on the road, and will be pulled by the rope to float within a certain range. If a drowning person (flood victim) is accidentally washed away by the flood, he or she will have the opportunity to grab the manhole cover 4 when passing by the drainage rescue device, providing a condition for self-rescue, preventing the drowning person from being washed away, allowing the drowning person to wait for rescue, and greatly reducing the probability of drowning. Because the number of manhole covers in the city is very large, after being washed away by the water, the drowning person can quickly enter the floating range of the manhole cover 4 of the drainage rescue device, further improving the drowning person's survival rate.

[0055] The above is a preferred embodiment of the present invention, but the embodiment of the present invention is not limited to the above content. Any other changes, modifications, substitutions, combinations, and simplifications made without departing from the spirit and principles of the present invention should be considered as equivalent replacement methods and are included in the scope of protection of the present invention.

Claims

1. A drainage rescue device that can be used in urban flood situations, characterized by: It includes a manhole cover seat, a manhole cover frame arranged on the manhole cover seat, a gravity drive member arranged inside the manhole cover seat, a plurality of manhole cover bodies arranged on the manhole cover frame and distributed in a circumferential direction, and a top rod arranged between each manhole cover body and the gravity drive member; wherein, the manhole cover body is provided with a drainage hole; the gravity drive member is provided with a water storage tank opening upward, and the lower end of the water storage tank is provided with a drainage notch; the water storage tank is located below the drainage hole; the gravity drive member is suspended at the outer end of the top rod, the middle part of the top rod is movably connected to the manhole cover frame, the inner end of the top rod is against the lower end of the manhole cover body, and the manhole cover frame and the manhole cover body are connected by a rope.

2. The drainage rescue device according to claim 1, characterized in that: There are multiple drainage notches, and the total drainage area of ​​the multiple drainage holes is greater than the total drainage area of ​​the multiple drainage notches.

3. The drainage rescue device according to claim 1, characterized in that: The inner end of the push rod is provided with a buckle portion that is bent outward and obliquely upward, and the bottom surface of the manhole cover body is provided with a matching groove that matches the buckle portion.

4. The drainage rescue device according to claim 3, characterized in that: The gravity driving member is provided with a plurality of lifting ears, and the lifting ears are arranged in a one-to-one correspondence with the top rod. The gravity driving member is suspended on the outer end of the top rod through the lifting ears.

5. The drainage rescue device according to claim 4, characterized in that: The lifting ear is provided with a lifting hole, the outer end of the top rod is provided with a positioning groove, and the lifting hole is hung in the positioning groove.

6. The drainage rescue device according to claim 5, characterized in that: The outer end of the push rod is provided with an anti-detachment hook for preventing the lifting ear from detaching, and the anti-detachment hook is bent upward.

7. The drainage rescue device according to claim 1, characterized in that: The manhole cover frame includes a main frame installed on the manhole cover seat and a sub-frame arranged at the lower end of the main frame. The manhole cover body is arranged on the main frame. A hinge hole is provided on the sub-frame at a position corresponding to the top rod, and the middle part of the top rod is hinged to the hinge hole.

8. The drainage rescue device according to claim 7, characterized in that: The sub-frame includes an upper frame and a lower frame arranged at the lower end of the upper frame, the bottom of the upper frame is provided with an upper arc-shaped groove opening downward, the upper part of the lower frame is provided with a lower arc-shaped groove opening upward, and the upper arc-shaped groove and the lower arc-shaped groove constitute the hinge hole; the upper end of the middle part of the push rod is provided with an upper arc-shaped protrusion, and the lower end of the middle part of the push rod is provided with a lower arc-shaped protrusion, the upper arc-shaped groove and the upper arc-shaped protrusion cooperate with each other, and the lower arc-shaped groove cooperates with the lower arc-shaped protrusion.

9. The drainage rescue device according to claim 8, characterized in that: The lower frame is provided with a limiting rod at a position corresponding to the lifting ear, the inner end of the limiting rod is fixedly connected to the outer side wall of the lower frame, and the outer end of the limiting rod extends outward from the lifting hole.

10. The drainage rescue device according to claim 1, characterized in that: The upper surface of the manhole cover is provided with a reflective mark.

Images