CN217500084U

CN217500084U - Unpowered flood prevention water blocking device

Info

Publication number: CN217500084U
Application number: CN202221788693.1U
Authority: CN
Inventors: 李勇; 马培文
Original assignee: CILIN & CAS ENVIRONMENTAL TECHNOLOGY (ANHUI) Inc
Current assignee: CILIN & CAS ENVIRONMENTAL TECHNOLOGY (ANHUI) Inc
Priority date: 2022-07-12
Filing date: 2022-07-12
Publication date: 2022-09-27
Anticipated expiration: 2032-07-12

Abstract

The utility model discloses an unpowered flood prevention water blocking device, which comprises a water receiving box buried underground and a lifting flashboard arranged in the water receiving box; the water receiving tank comprises a top plate which is adaptive to the ground and is not covered and a tank body which is hermetically connected with the top plate and is buried underground, a plurality of water inlet grooves which are communicated with the tank body are arranged on the top plate, an avoiding groove is arranged at the rear part of the last water inlet groove along the water flow direction, and the lifting flashboard is lifted by the avoiding groove; the bottom of the lifting flashboard is connected with a buoyancy tank, and after rainwater enters the water receiving tank from the water inlet groove, the buoyancy tank is lifted by buoyancy and drives the lifting flashboard to extend out of the avoiding groove, so that water flow passing through the upper part of the water receiving tank is intercepted; the utility model discloses a water blocking device installs this device in the underground that needs interception rivers position, does not influence the inequality and the pleasing to the eye of environment, simultaneously through rivers automatic start drive, and the promptness is good, and intensity of labour is also low, can install and use at each basement gate or regional gate.

Description

Unpowered flood prevention water blocking device

Technical Field

The utility model belongs to flood control equipment field, more specifically the utility model relates to an unpowered flood prevention water blocking device that says so.

Background

In recent years, extreme weather frequently appears, rainstorm flood often occurs, urban waterlogging is serious, most of the urban waterlogging is that rainwater is not discharged in time, and enters factories, underground garages, subways and the like, so that huge loss is caused, including casualties and property scrapping, and huge damage, pain and loss are brought to the society. In order to solve the problems, a waterproof flood gate is generally arranged at an entrance and an area gate of a ground reservoir, and water flow interception and area isolation are realized through a flashboard when flood occurs, so that external flood is prevented from entering, and the safety of personnel and property is ensured. Among the prior art, the flood control floodgate mainly divide into two kinds, one kind is automatic gate, through electric automatic control promptly, realizes that the gate goes up and down, realizes the flood control, and this kind of flood control can not use when waterlogging or electrical fault or outage appear with the help of electrical equipment. The other kind is through manual operation, piles up through adopting flood control sand bag, realizes the flood control, and this kind of flood control operation needs the people hand many, needs personnel's control in 24 hours, still need stack a large amount of flood control sand bags etc. near simultaneously, and the operation of flood control is difficult to do big promptness, and when flood waterlogging did not appear, piling of sand bag still influences beautifully simultaneously.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an unpowered flood prevention water blocking device installs this device in the underground that needs interception rivers position, does not influence the inequality of environment and pleasing to the eye, simultaneously through rivers automatic start drive, need not carry out 24 hours and guard, and the promptness is good, and intensity of labour is also low, can install and use at each warehouse gate or regional gate.

The technical scheme of the utility model is that the unpowered flood prevention water blocking device comprises a water receiving tank buried underground and a lifting flashboard which is arranged in the water receiving tank, can extend out from the top of the water receiving tank and blocks the water flow passing through the upper part of the water receiving tank; the water receiving tank comprises a top plate which is adaptive to the ground and is not covered and a tank body which is hermetically connected with the top plate and is buried underground, a plurality of water inlet grooves which are communicated with the tank body are arranged on the top plate, an avoiding groove is arranged at the rear part of the last water inlet groove along the water flow direction, and the lifting flashboard is lifted by the avoiding groove;

the bottom of the lifting flashboard is connected with a buoyancy tank, and after rainwater enters the water receiving tank from the water inlet groove, the buoyancy tank is lifted by buoyancy and drives the lifting flashboard to extend out of the avoiding groove, so that water flow passing through the upper part of the water receiving tank is intercepted;

the intake chamber below is provided with sand prevention board, sand prevention board is the U type, include with the roof is parallel connect the flitch with connect the curb plate of flitch both sides, two the curb plate top all with the downside rigid coupling of roof, two all be provided with the drainage hole on the curb plate, the drainage hole intercommunication the intake chamber with the box, the water receiving incasement in-connection has initiative drainage mechanism.

Preferably, a pressure reducing plate is fixedly connected to the bottom of the lifting gate plate, and the pressure reducing plate is arranged on the buoyancy tank and fixed with the buoyancy tank; the width of the pressure reducing plate is smaller than that of the buoyancy tank, and the length of the pressure reducing plate is smaller than that of the buoyancy tank;

the two side faces of the pressure reducing plate are provided with hooks, fixing ropes are fixedly connected to the hooks, and the fixing ropes bypass the buoyancy tank to fix the buoyancy tank and the pressure reducing plate.

Preferably, the depth of the box body is adapted to the sum of the heights of the lifting flashboards, the decompression boards and the buoyancy tanks; when the flotation tank falls on the bottom surface in the box body, the top surface of the lifting flashboard is arranged in the dodging groove and is not protruded.

Preferably, dodge the groove below and be provided with the deflector, the deflector with the lower surface rigid coupling of roof, the deflector is frame shape and cover and establishes the lift flashboard is outside, realizes lift flashboard lift direction.

Preferably, dodge the groove below and still be provided with the extension backplate, the extension backplate is including two extension curb plates that set up relatively, two the extension curb plate is arranged in respectively lift flashboard both sides and all with the lower surface rigid coupling of roof, two extend between the curb plate distance with dodge the groove width and suit.

Preferably, the avoiding groove width is adapted to the lifting flashboard width, and the avoiding groove length is adapted to the lifting flashboard length.

Preferably, be provided with two spacing frames on the upper surface of roof, two spacing frames 2 set up relatively and arrange the lift flashboard both ends respectively in, the lift flashboard rises the back, along the length direction of lift flashboard, the both ends face of lift flashboard contacts and seals with two spacing frames respectively.

Preferably, the limiting frame comprises a U-shaped groove facing the lifting gate plate, and the width of the U-shaped groove is adapted to the width of the limiting gate plate; the sealing grooves are respectively formed in two end faces of the limiting flashboard, sealing strips are arranged in the sealing grooves, and the sealing strips are arranged in the U-shaped grooves to realize sealing between the lifting flashboard and the limiting frame.

Preferably, the maximum distance between the two sealing strips is greater than the distance between the two U-shaped grooves, a downward inclined guide inclined plane is arranged at the top of each sealing strip, and the distance between the tops of the two guide inclined planes is less than the distance between the two U-shaped grooves.

Preferably, the water receiving tank, the limiting frame and the lifting gate plate are made of stainless steel, and the sealing strip and the buoyancy tank are made of rubber.

The utility model discloses technical scheme's an unpowered flood prevention water blocking device's beneficial effect is:

1. through setting up the water receiving tank and arranging the lift flashboard in the water receiving tank, after rivers got into the water receiving tank in, buoyancy drive lift flashboard rose, realized damming the rivers that pass through the water receiving tank top, realized the flood control.

2. Set up sand prevention board etc. and realize protecting the intake chamber, avoid subaerial a large amount of impurity or dust or rubbish etc. to get into the water receiving incasement, cause the intake chamber to block up, or cause the water receiving incasement volume to reduce, or some great longer rubbish etc. cause the interference to the come-up of flotation tank, influence the lift of lift flashboard.

Drawings

Fig. 1 is the technical scheme of the utility model an unpowered flood prevention water blocking device's structural schematic diagram, this device is the state diagram when the flood does not take place also, and wherein the end plate at box both ends is not drawn.

Fig. 2 is the state diagram of the technical scheme of the utility model when the unpowered flood prevention water blocking device carries out flood control after the flood takes place.

Fig. 3 is a front view of fig. 1.

Fig. 4 is a top view of fig. 1.

Fig. 5 is a schematic view of the state of the lifting gate plate in two limiting frames.

Fig. 6 is a schematic diagram of states of the lifting gate plate and the avoiding groove, and a schematic diagram of a state of the sealing strip in the limiting frame after the lifting gate plate is lifted.

Fig. 7 is a schematic view of a sand control plate.

Fig. 8 is a schematic view of the installation of the unpowered flood prevention water retaining device in the waterproof position according to the technical scheme of the present invention.

Detailed Description

In order to facilitate the understanding of the technical solutions of the present invention by those skilled in the art, the technical solutions of the present invention will now be further described with reference to the drawings attached to the specification.

As shown in fig. 1, fig. 3 and fig. 7, the utility model discloses technical scheme an unpowered flood prevention water blocking device, including embedding in the water receiving tank 1 of underground and arranging in the water receiving tank 1 and can extend and carry out the lift flashboard 5 that intercepts the rivers that pass through water receiving tank 1 top by the top of water receiving tank 1. The water receiving tank 1 includes a ceiling plate 11 adapted to the ground and not covered, and a tank body 12 hermetically connected to the ceiling plate 11 and buried underground. A plurality of water inlet grooves 3 communicated with the box body 12 are formed in the top plate 11, an avoiding groove 4 is formed in the rear portion of the last water inlet groove 3 in the water flow direction, and the lifting flashboard 5 is lifted through the avoiding groove 4.

Based on above-mentioned technical scheme, when the flood takes place, the water level is higher than roof 11 and when the roof 11 was gone up to the flow, rivers get into in the water receiving tank 1 by intake chamber 3, and when water capacity was enough in the water receiving tank 1, lift flashboard 5 received sufficient buoyancy, overcome its self weight, rise. After the lifting flashboard 5 rises, when the water volume in the water receiving tank 1 is not full, the water flow is not influenced and is continuously fed into the water receiving tank 1 through the water inlet groove 3, the water flow continuously feeds into the water receiving tank, the water level in the water saving tank continuously rises, the lifting flashboard 5 continuously moves upwards, the lifting flashboard 5 further realizes the interception of the water flow above the water saving tank 1, when the top of the lifting flashboard 5 is higher than the water level above the water receiving tank 1, the interception of the water flow above the water receiving tank 1 is completely realized, and the complete flood control is realized.

Based on above-mentioned technical scheme for ensure the flood control effect for 5 high reasonable in design that should be of lift flashboard, lift flashboard 5 should be greater than the highest water level that the water receiving case top can pass through. Certainly, when the large-scale flood of proruption, 1 top water level of water-saving tank or the highest water level of duration appears, perhaps water level height is higher than lift flashboard 5 this moment, and lift flashboard 5 can also realize the flood interception completely after rising to the highest position this moment, but because of the rise of lift flashboard 5 for the rivers cross section through water receiving tank top reduces, even in getting unit interval, get into through the water receiving tank top and reduced by the regional water yield of flood control, also can realize reducing the mesh of calamity.

Among the above-mentioned technical scheme, roof 11 and the detachable fixed mounting of box 12 break down at this device after, like lift flashboard can not normally go up and down or flotation tank damage etc. all can dismantle roof 11, realize overhauing, and easy operation is swift, need not dig ground.

In this technical scheme, lift flashboard 5 bottom is connected with flotation tank 6, and flotation tank 6 rises and drives lift flashboard 5 and stretch out by dodging groove 4 in the rainwater gets into water receiving tank 1 back by intake antrum 3, receives buoyancy, dams the rivers through 1 tops of water receiving tank. Through the setting of flotation tank 6 for lift flashboard 5 can rise promptly when the water receiving tank 1 internal water volume is less, makes lift flashboard 5 can be quick carry out flood control reaction. Buoyancy tank 6 is hollow rubber seal case, and outside is bulky, receives buoyancy big, can come up under the small water yield condition promptly for the quick come-up of lift flashboard 5.

In this technical scheme, as shown in fig. 3 and 7, intake antrum 3 below is provided with sand control plate 31, and sand control plate 31 is the U type, includes the flitch 312 that connects with roof 11 is parallel with the curb plate 313 of connecting in flitch 312 both sides, and both sides board 313 top all with the downside rigid coupling of roof 11, all is provided with drainage hole 311 on both sides board 313, and drainage hole 311 communicates intake antrum 3 and box 12. Rainwater enters from the water inlet groove 3 and then enters the inside of the water receiving tank 1 through the water filtering holes 311 on the two side plates 313. Among this technical scheme, through setting up sand control plate 31, realize protecting intake chamber 3, avoid subaerial a large amount of impurity or dust or rubbish etc. to get into the water receiving incasement, cause the intake chamber to block up, or cause the water receiving incasement volume to reduce, or some great longer rubbish etc. cause the come-up of flotation tank to interfere, influence the lift of lift flashboard. Simultaneously, set up sand control plate 31, also can effectually avoid some private article, directly fall into the problem in the water receiving case 1 by intake chamber 3 like the key etc.. In this technical scheme, set up sand control plate 31 in intake chamber 3 below, some dusts etc. fall on sand control plate 31, can clear up sand control plate 31 through regular clearance, like the dust absorption etc. ensure the unblocked of water filtration hole 311 on the sand control plate 31.

In this technical scheme, lift flashboard 5 bottom rigid coupling has decompression board 52, and decompression board 52 is arranged in on flotation tank 6 and is fixed with flotation tank 6. The decompression plate 52 has a width smaller than the width of the buoyancy tank 6 and the length of the decompression plate 52 is smaller than the length of the buoyancy tank 6. Set up decompression board 52, be convenient for realize the fixed of lift flashboard 5 and flotation tank 6, the lift flashboard 5 of being convenient for keeps upright state on flotation tank 6, also reduces flotation tank 6 simultaneously and receives lift flashboard 5 unit pressure size, extension flotation tank life.

In the technical scheme, hooks are arranged on two side faces of the pressure reducing plate 52, fixing ropes 53 are fixedly connected to the hooks, and the fixing ropes 53 bypass the buoyancy tank to realize the fixation of the buoyancy tank 6 and the pressure reducing plate 52.

In the technical scheme, the depth of the box body 12 is adapted to the sum of the heights of the lifting flashboard 5, the pressure reducing board 52 and the buoyancy tank 6. When the buoyancy tank 6 is dropped on the inner bottom surface of the tank body 12, the top surface of the elevating shutter 5 is placed in the avoiding groove 4 and does not protrude out of the avoiding groove 4.

Based on above-mentioned technical scheme, the height of increase lift flashboard 5 that on the one hand can furthest, the maximum water level height that increase lift flashboard 5 can prevent flood completely. Simultaneously, when flotation tank 6 fell on the bottom surface in box 12, the top surface of lift flashboard 5 was arranged in and is dodged the groove 4 and not outstanding groove 4 of dodging, and when no waterlogging promptly, the groove 4 of dodging was arranged in at lift flashboard 5 top, realizes dodging the sealing of groove 4, avoids in dust rubbish etc. gets into water receiving tank 1 by dodging the groove. Meanwhile, the lifting position of the lifting flashboard 5 can be guided, the situation that the positions of the buoyancy tank and the lifting flashboard 5 deviate from the avoidance groove due to bottom surface vibration and the like is avoided, and the situation that the lifting flashboard 5 cannot be smoothly lifted out from the avoidance groove 4 when flood occurs is avoided.

In the present embodiment, as shown in fig. 7, a guide plate 7 is provided below the avoidance groove 4, and the guide plate 7 is fixedly connected to the lower surface of the top plate 11. The guide plate 7 is frame-shaped and is sleeved outside the lifting flashboard 5, so that the lifting flashboard 5 is guided in a lifting mode. Two ends of the guide plate 7 are fixedly connected with the lower surface of the top plate through connecting plates, the guide plate 7 is arranged at a distance to avoid the groove to advance, and the influence on the floating height of the lifting flashboard 5 and the floating box is reduced as much as possible. The setting of deflector 7 for 5 quick come-up in-process of lift flashboard can not take place the skew, also reduce 5 ranges of rocking of lift flashboard simultaneously, still reduce 5 come-up in-process of lift flashboard simultaneously or rock the in-process to the roof and dodge the influence in groove.

This technical scheme board dodges groove 4 below and still is provided with extension backplate 41, and extension backplate 41 is including two extension curb plates of relative setting, and two extension curb plates are arranged in lift flashboard 5 both sides respectively and all are adapted with the lower surface rigid coupling of roof 11, distance and dodge 4 width in groove between two extension curb plates. Extend the curb plate and realize spacing and direction lifting gate plate 5 for lifting gate plate 5 is arranged in and is dodged the inslot or can not bump scheduling problem with dodging groove or roof when lifting gate plate 5 goes up and down.

In this technical scheme, dodge 4 width in groove and adapt to with 5 width of lift flashboard, dodge 4 length in groove and adapt to with 5 length of lift flashboard. Make lift flashboard 5 extend the back by dodging the inslot when flood control, lift flashboard 5 and dodge the inslot time and realized sealedly, avoid rivers by lift flashboard 5 with dodge between the groove get into the back flow face side of lift flashboard 5, avoid rivers to get into promptly by in the guard space.

In this technical scheme, as shown in fig. 1, be provided with two spacing frames 2 on the upper surface of roof 11, two spacing frames 2 set up relatively and arrange in lift flashboard 5 both ends respectively. After the lifting gate plate 5 is lifted, along the length direction of the lifting gate plate 5, two end faces of the lifting gate plate 5 are respectively contacted and sealed with the two limit frames 2. The setting of spacing frame 2 realizes sealing 5 both ends of lift flashboard on the one hand, avoids rivers to pass through by 5 both ends of lift flashboard, has just so reduced the requirement of lift flashboard 5 to the installation environment position, avoids the problem of direct sealing difficulties such as 5 both ends of lift flashboard and wall.

Among the above-mentioned technical scheme, the setting of spacing frame 2 can also realize fixing or spacing the lift flashboard 5 in the flood control, avoids lift flashboard 5 to take place to rock or the problem of buckling backward under the flood effect.

Among this technical scheme, spacing frame 2 is including U type groove 21 towards lift flashboard 5, and U type groove 21 width suits with 2 width of spacing floodgate. And sealing grooves are respectively arranged on two end surfaces of the limiting flashboard 5, and sealing strips 51 are arranged in the sealing grooves. The sealing strip 51 is arranged in the U-shaped groove 21 to realize sealing between the lifting flashboard 5 and the limiting frame 2. As shown in fig. 5, after the lifting gate plate 5 rises, the sealing strips 51 on the lifting gate plate 5 are extruded by the U-shaped grooves, so that the sealing between the lifting gate plate 5 and the U-shaped grooves 21 is realized, the sealing between the lifting gate plate 5 and the two limiting frames 2 is effectively realized, the water flow is prevented from passing between the limiting frames 2 by the lifting gate plate 5, and the closure flood control is effectively realized.

In the present embodiment, as shown in fig. 6, the maximum distance between the two sealing strips 51 is greater than the distance between the two U-shaped grooves 21, the top of the sealing strip 51 is provided with a downward inclined guiding slope 511, and the distance between the tops of the two guiding slopes 511 is smaller than the distance between the two U-shaped grooves 21. After the sealing strip 51 is installed in the sealing groove, a part of the sealing strip protrudes out of the sealing groove and is extruded by the U-shaped groove 21 to realize sealing. Like this at lift flashboard 5 in-process that rises, sealing strip 51 top will take place to interfere with dodging the groove, through setting up guide inclined plane 511, realizes guiding the sealing strip, avoids the sealing strip top with dodge groove or U type groove contact time take place to interfere and fall to be the sealing strip and appear breaking away from the scheduling problem.

For further guaranteeing that the sealing strip can not appear breaking away from the scheduling problem, the inslot etc. are kept away from in arranging in when not taking place the waterlogging to the lift flashboard 5 of also being convenient for simultaneously, have last strake 54 at lift flashboard 5 top demountable installation, go up strake 54 and realize compressing tightly etc. to sealing strip 51 top, avoid in lift flashboard 5 goes up and down, the sealing strip by landing etc. in the seal groove.

Among this technical scheme, water receiving tank 1, spacing frame 2 and lift flashboard 5 material are the stainless steel, adopt stainless steel material, avoid each part to appear rusty corrosion or because of the dead problem of corrosion card does. The sealing strips and the buoyancy tank are made of rubber, so that the cost is low, the service life is long, and the like.

As shown in fig. 8, for the utility model discloses technical scheme's an unpowered flood prevention water blocking device is in waterproof position installation sketch map, is about to in water receiving tank 1 installation ground 1, and roof 11 suits with ground height, goes to cover on the roof 11, and two spacing frames 2 are installed in the wall body 200 of the both sides of 1 top passageway of water receiving tank, and when the flood did not take place, personnel etc. are passed through by the region between two spacing frames 2. When taking place the flood, rivers get into water receiving tank 1, and lift flashboard 5 rises under rivers buoyancy, realizes that the passageway between two spacing frames 2 of butt joint water tank top cuts, and rivers can not pass through, realize the flood control. The process is completely automatic, does not need power, is safe and reliable, and has no influence when the power is cut off suddenly.

As shown in fig. 1, the unpowered flood prevention water blocking device of the technical scheme is in a waterproof position, and an active drainage mechanism is connected in a water receiving tank, wherein the active drainage mechanism mainly comprises a water pump, a water pumping device or a drainage pipe communicated with the water pumping device. The setting of initiative drainage mechanism promptly after the flood retreats, starts initiative drainage mechanism, realizes initiatively discharging the rainwater in the water receiving tank 1 for lift flashboard 5 resets downwards. Such as: install water pump 8 in water receiving tank 1, after the flood retreats, start the water pump, take out the interior rainwater of water receiving tank 1 futilely, flotation tank 6 and lift flashboard 5 because of the dead weight whereabouts are hidden in water receiving tank 1, get back to the initial position, do not influence the normal current of water receiving tank 1 top.

The technical solution of the present invention is to provide an improved method for manufacturing a semiconductor device, which is characterized in that the method is not limited by the above-mentioned method, and the method is not substantially improved by the method and the device, or the method and the device are directly applied to other occasions without improvement, all within the protection scope of the present invention.

Claims

1. An unpowered flood prevention water blocking device is characterized by comprising a water receiving tank buried underground and a lifting flashboard which is arranged in the water receiving tank, can extend out from the top of the water receiving tank and blocks water flow passing through the upper part of the water receiving tank; the water receiving tank comprises a top plate which is adaptive to the ground and is not covered and a tank body which is hermetically connected with the top plate and is buried underground, a plurality of water inlet grooves which are communicated with the tank body are arranged on the top plate, an avoiding groove is arranged at the rear part of the last water inlet groove along the water flow direction, and the lifting flashboard is lifted by the avoiding groove;

the bottom of the lifting flashboard is connected with a buoyancy tank, and after rainwater enters the water receiving tank from the water inlet groove, the buoyancy tank is lifted by buoyancy and drives the lifting flashboard to extend out of the avoiding groove, so that the water flow passing through the upper part of the water receiving tank is intercepted;

the intake chamber below is provided with sand prevention board, sand prevention board is the U type, include with the roof is parallel connect the flitch with connect the curb plate of flitch both sides, two curb plate top all with the downside rigid coupling of roof, two all be provided with the drainage hole on the curb plate, the drainage hole intercommunication the intake chamber with the box, the water receiving incasement in-connection has initiative drainage mechanism.

2. The unpowered flood prevention water blocking device according to claim 1, wherein a decompression plate is fixedly connected to the bottom of the lifting gate plate, and the decompression plate is arranged on the buoyancy tank and fixed to the buoyancy tank; the width of the pressure reducing plate is smaller than that of the buoyancy tank, and the length of the pressure reducing plate is smaller than that of the buoyancy tank;

3. The unpowered flood prevention water blocking device according to claim 1, wherein the depth of the box body is adapted to the sum of the heights of the lifting flashboards, the decompression boards and the buoyancy tanks; when the flotation tank falls on the bottom surface in the box body, the top surface of the lifting flashboard is arranged in the dodging groove and is not protruded.

4. The unpowered flood prevention water blocking device according to claim 1, wherein a guide plate is arranged below the avoidance groove, the guide plate is fixedly connected with the lower surface of the top plate, and the guide plate is frame-shaped and sleeved outside the lifting gate plate to achieve lifting guide of the lifting gate plate.

5. The unpowered flood prevention water blocking device according to claim 1, wherein an extension guard plate is further arranged below the avoidance groove and comprises two extension side plates which are oppositely arranged, the two extension side plates are respectively arranged on two sides of the lifting gate plate and are fixedly connected with the lower surface of the top plate, and the distance between the two extension side plates is matched with the width of the avoidance groove.

6. The unpowered flood prevention water blocking device according to claim 1, wherein the width of the avoiding groove is adapted to the width of the lifting gate plate, and the length of the avoiding groove is adapted to the length of the lifting gate plate.

7. The unpowered flood prevention water blocking device according to claim 1, wherein two limiting frames are arranged on the upper surface of the top plate, the two limiting frames 2 are oppositely arranged and respectively arranged at two ends of the lifting gate plate, and after the lifting gate plate is lifted, two end faces of the lifting gate plate are respectively in contact with the two limiting frames and are sealed along the length direction of the lifting gate plate.

8. The unpowered flood prevention water blocking device according to claim 7, wherein the limiting frame comprises a U-shaped groove facing the lifting gate plate, and the width of the U-shaped groove is adapted to the width of the limiting gate plate; the sealing grooves are respectively formed in two end faces of the limiting flashboard, sealing strips are arranged in the sealing grooves, and the sealing strips are arranged in the U-shaped grooves to realize sealing between the lifting flashboard and the limiting frame.

9. The unpowered flood prevention water blocking device according to claim 8, wherein the maximum distance between the two sealing strips is larger than the distance between the two U-shaped grooves, a downward-inclined guide inclined plane is arranged at the top of each sealing strip, and the distance between the tops of the two guide inclined planes is smaller than the distance between the two U-shaped grooves.

10. The unpowered flood prevention water blocking device according to claim 1, wherein the water receiving tank, the limiting frame and the lifting gate plate are made of stainless steel, and the sealing strip and the buoyancy tank are made of rubber.