Sluice gate automatic inflation leak-plugging apparatus and operation method thereof

Abstract

A sluice gate automatic inflation leak-plugging apparatus, comprising an air bladder (2) arranged at the bottom of a sluice gate (1); the front end of the air bladder (2) is connected to a bottom water seal (3) at the bottom of the sluice gate (1), and an upper side of the rear end of the air bladder (2) is hung on a hook (5) via a hanging rope (4); the hook (5) is secured to the inner wall of the sluice gate (1), the air bladder (2) is connected via an inflation tube (6) to an air storage tank (7), and the air storage tank (7) is secured to the inside of the sluice gate (1); the air storage tank (7) is provided with an air-supplementing check valve (8), and an air bladder inflation valve mechanism is arranged at a port connecting the air storage tank (7) and the inflation tube (6); the sluice gate automatic inflation leak-plugging apparatus achieves the plugging of a hole at the bottom of a sluice gate (1).

Description

The present invention relates to the technical field of sealing water gates, and in particular to an automatic air-inflation and leaking-stoppage device of a water gate and an operation method thereof. BACKGROUND OF THE INVENTION Water Gate equipment is widely used in hydropower and water conservancy projects and other projects, but after the water gate falls in water, there is some small or large gaps between the gate and the gate groove’s threshold due to many factors, such as damaged waterproofed bottoms of the gate, pits formed by eroding the threshold, and foreign matter sticking in the bottom of the gate. Because the waterhead is high at the gate, it is easy to cause a large amount of high-pressure water jets behind the gate, so it is very difficult to do waterproof work and drainage for high-pressure. People often throw coal cinders and stone slags in the front of the gate as an existing technology so far as to give such an unsatisfactory effect that it is also necessary for a diver to do underwater waterproof work, with very poor economy and very low efficiency, bringing a great danger to the diver and other workers and greatly impacting the progress of the project. Therefore, there is an urgent need for an intelligentized and simple solution. SUMMARY OF THE INVENTION The technical problem to be solved by the present invention is to enable the pits and holes of the gate groove’s threshold to be sealed and plugged through the inflation of air bags without any external power and ensure the reliability of underwater operations by providing an automatic air-inflation and leaking-stoppage device of a water gate and an operation method thereof. In order to solve the above technical problem, the technical scheme adopted in the present invention is as follows: an automatic air-inflation and leaking-stoppage device of a water gate, comprising an airbag, waterproof bottom, a sling, a hook, an inflation pipe, an air-storing tank, a reflating unidirectional valve and an airbag-inflating valve mechanism; wherein the airbag is arranged at the bottom of the water gate, the front end of the airbag is connected to the waterproof bottom at the bottom of the water gate, the upper side of the rear end of the airbag is hung on the hook by means of the sling, the hook is fixed on the inner wall of the water gate, the air bag is connected to the air-storing tank by means of the inflation pipe, the air-storing tank is fixed on the inside of the water gate and provided with the reflating unidirectional valve, and the connection portion between the air-storing tank and the inflation pipe is provided with the airbag-inflating valve mechanism. In a preferred embodiment, the air bag-inflating valve mechanism includes a valve casing-pipe arranged at the connection portion between the air-storing tank and the inflation pipe, the valve casing-pipe is arranged inside the air-storing tank, and fits in with a lower cone valve, which enlarges from top to bottom, and at the top of which a valve rod is arranged, a sealing casing-pipe fitting with the valve rod is arranged at the top of the air-storing tank, a casing-pipe-sealing ring is arranged inside the sealing casing-pipe, a sealing plate is arranged on the valve rod, and a return spring is arranged between the sealing plate and the lower cone valve. In a preferred embodiment, a sealing ring is arranged on the upper side of the sealing plate, and the sealing ring corresponds to the sealing casing-pipe. In a preferred embodiment, a safety valve is arranged on the air-storing tank, and an unidirectional valve is arranged on the inflation pipe. In a preferred embodiment, a plurality of ventilation holes are arranged on the valve casing-pipe. In a preferred embodiment, the upper end of the valve rod extends to the upward aspect of the water gate, a casing-pipe fitting in with the valve rod is arranged on the water gate, the valve rod is arranged below a gravity water-filling valve, a detachable heel block is arranged between the gravity water-filling valve and the top of the water gate, the top of the detachable heel block is over the top of the valve rod, and a heel block groove fitting in with the detachable heel block is arranged on the top of the water gate. In a preferred embodiment, a plurality of airbag-shaping baffles are arranged inside the front end of the airbag, connected to the inside of the airbag, and rotationally installed on a baffle handle. In a preferred embodiment, an airbag protrusion is arranged on both sides of the front end of the airbag, and the airbag protrusion is communicated with the airbag. In a preferred embodiment, an outlet valve and a leak-detecting inlet valve are arranged on the airbag. The present invention also provides an operation method of an automatic air-inflation and leaking-stoppage device of a water gate comprising the following steps: SI. hanging an airbag on a hook by means of a sling, then normally starting the water gate; S2. when water leaking occurs at the bottom of the water gate, enabling the valve cover of a gravity water-filling valve to fall, then pressing downwards a valve rod, next actuating a airbag-inflating valve mechanism, which inflates the airbag through an inflation pipe, next enabling the air bag under the action of the high pressure of a gas-storing tank to dilate to riven the sling and quickly expand, then quickly fill the leaking gap, driven by the high-speed leaking water flow in the leaking hole at the bottom of the water gate, finally stopping inflating automatically after the pressure in the air-storing tank and the air bag has balanced; S3, in the case that the jamming matter causes water leaking of the water gate, filling an airbag protrusion with air to expand, meanwhile inflating the airbag, then enabling the airbag protrusion to plug the leaking holes at both ends under the suction force arising from the leaking water of the leaking holes at both ends, next stopping inflating automatically after the pressure in the air-storing tank and the air bag has balanced; and S4. lifting the water gate after operation to enable the airbag to rise with the water gate, thus resetting the gravity water-filling valve, then enabling a lower cone valve to reset upwards under the action of a return spring, next closing the inflation pipe and deflating the airbag through an outlet valve, finally reusing the airbag by hanging the sling on the hook after the airbag has shrunk. The present invention provides an automatic air-inflation and leaking-stoppage device of a water gate and an operation method thereof, which have the following beneficial effects. 1. Running without external power. A gravity water-filling valve structure is adopted in the water gate itself, and only under the function of the gravity of the gravity water-filling valve, leaking-stoppage work can be automatically done without any external power, solving such a big technical problem as to stop leaking for the water gate. 2. Having a simple and reliable structure. Fully considering the possible influence of underwater high water pressure on the device, the airbag-inflating valve mechanism is optimally designed to be in the air storing tank to ensure the practicality and reliability of the device. 3. Having good adaptability. By adding an airbag-shaping baffle that can rotate around the baffle handle, it can not only fit in with the need of plugging small leaking points, but also fit in with the need of plugging various large leaking points and the different needs arising from various hole-shaped leaking points, so it has good adaptability. BRIEF DESCRIPTION OF THE DRAWINGS The present invention is further described in combination with the drawings and examples as follows. FIG. 1 shows a structure view of the overall present invention. FIG.2 shows a side view of the present invention. FIG. 3 shows an installation diagram of the airbag. FIG.4 shows a structure view of the airbag. FIG. 5 shows a structure view of the air-storing tank. FIG.6 shows a structure diagram of the closed state of the airbag-inflating valve mechanism. FIG.7 shows a structure diagram of the open state of the airbag-inflating valve mechanism. FIG. 8 shows an installation diagram of the gravity water-filling valve. Wherein, 1-water gate, 2-airbag, 3-waterproof bottom, 4-sling, 5-hook, 6-inflation pipe, 7-air-storing tank, 8-reflating unidirectional valve, 9-valve casing pipe, 1 O-lower cone valve, 11-valverod, 12-sealing casing pipe, 13-casing-pipe-sealing ring, 14-sealing plate, 15-retum spring, 16-sealing ring, 17-safety valve, 18-unidirectional valve, 19-casing pipe, 20-gravity water-filling valve, 21-detachable heel block, 22-airbag-shaping baffle, 23-baffle handle, 24-outlet valve, 25-leak-detecting inlet valve, 101-heel block groove, 201-airbag protrusion, 901-ventilation hole. DETAILED DESCRIPTION OF SOME EMBODIMENTS As shown in FIGs. 1 ~4, an automatic air-inflation and leaking-stoppage device of a water gate includes the airbag 2 arranged at the bottom of the water gate 1, the front end of the airbag 2 is connected to the waterproof bottom 3 at the bottom of the water gate 1. The airbag 2 is designed to be a bag-like structure made from a soft elastic material, preferably elastic rubber and other materials, the airbag 2 may be integrated with the waterproof bottom 3 of the water gate, thus, when the waterproof bottom 3 is damaged, it can be replaced by means such as hot gluing or vulcanization, improving the economy and reliability in such a way for dual purpose. The airbag 2 is foldedly arranged close to the cavity structure at the bottom of the water gate 1, the upper side of the rear end of the airbag 2 is hung on the hook 5 by means of the sling 4, which is set at multi-points, and the hook 5 is fixed on the inner wall of the water gate 1 to avoid the water gate 1 from dispersing when it is normally opened and closed. The other end of the airbag 2 is integrated with the waterproof bottom 3, and fixed to the bottom of the water gate with water-sealing pressure plates and bolts, and the bolt hole on the airbag at this end is drilled in a whole rubber plate, so that around the inner and outer periphery of the hole there is no gap leading to the inside of the airbag, therefore, it does not bring anxiety about water leaking and air leaking from the bolt hole after the airbag has been inflated. By means of the inflation pipe 6, The air bag 2 is connected to the air-storing tank 7, which is fixed on the inside of the water gate 1, typically arranged in the cavity of the middle section of the water gate 1, and which is provided with the reflating unidirectional valve 8, the connection portion between the air-storing tank 7 and the inflation pipe 6 is provided with an airbag-inflating valve mechanism, and the reflating unidirectional valve 8 is used to inflate the air-storing tank 7. The air bag 2 is inflated through the inflation pipe 6, then the air bag 2 under the action of the high pressure of the gas-storing tank 7 dilates to riven the sling 4 and quickly expands, next quickly fills the leaking gap, driven by the high-speed leaking water flow in the leaking hole at the bottom of the water gate 1, so as to achieve the effect of leaking-stoppage. The air pressure of the inflated air-storing tank 7 can be determined in the light of the calculation to the pressure caused by the water depth arising from the drop of the water gate on the air bag 2, after the pressure in the air-storing tank 7 and the air bag 2 has balanced, the automatic inflation stops. The airbag-inflating valve mechanism may be designed in many forms. In order to ensure the reliability of the underwater inflation under the conditions of high water pressure and large flow, in this example, as shown in FIGs.5~7, the air bag-inflating valve mechanism includes a valve casing pipe 9 arranged at the connection portion between the air-storing tank 7 and the inflation pipe 6. The valve casing pipe 9 is a cone enlarging from top to bottom, arranged inside the air-storing tank 7, and fits in with the lower cone valve 10, which enlarges from top to bottom, and at the top of which the valve rod 11 is arranged. The sealing casing pipe 12 fitting with the valve rod 11 is arranged at the top of the air-storing tank 7, and the casing-pipe-sealing ring 13 is arranged inside the sealing casing pipe 12. The sealing plate 14 is arranged on the valve rod 11, and an annular casing pipe cover plate pressing against the sealing casing pipe 12 is arranged at the top of the air-storing tank 7. The return spring 15 is arranged between the sealing plate 14 and the lower cone valve 10, when no need to inflate the airbag, the lower cone valve 10 returns upwards under the action of the return spring 15. As the air pressure of the inflated air-storing tank 7 can be determined in the light of the calculation to the pressure caused by the water depth arising from the drop of the water gate on the air bag 2, the air-storing tank 7 inflates the air bag 2, and then stops inflating automatically after the pressure in the air-storing tank 7 and the air bag 2 has balanced. Preferably, the casing-pipe-sealing ring 13 adopts highly-elastic soft materials. The casing-pipe-sealing ring 13 is in close contact with the valve rod 11 to avoid the casing-pipe-sealing ring 13 from loosening when the valve rod 11 moves. The casing-pipe-sealing ring 13 is embedded in the sealing casing pipe 12, enabling the air stored in the air-storing tank 7 not to overflow from the sealing casing pipe 12, and also preventing external water from entering the air-storing tank 7. The sealing plate 14 and the valve rod 11 are fixedly connected with each other, and enabled to return upwards without applied pressure under the propulsive force of the return spring 15, thereby ensuring that the lower cone valve 10 is tightly combined with the valve casing pipe 9 to avoid the air in the air-storing tank 7 from overflowing from the lower cone valve 10, furthermore, the sealing ring 16 is arranged on one side of the sealing plate 14 close to the sealing casing pipe 12, so as to further enhance the sealing effect. When the valve rod 11 moves downwards, the lower cone valve 10 is disengaged from the valve casing pipe 9, and the air in the air-storing tank 7 enters the inflation pipe 6 from the ventilation hole 901 and the gap between the lower cone valve 10 and the valve casing pipe 9, and then enters the air bag 2. A plurality of ventilation holes 901 are arranged on the valve casing pipe 9. For the ventilation holes 901, when the lower cone valve 10 moves downwards, flow-passing gaps exist between the lower cone valve 10 and the valve casing pipe 9, thus the air in the air-storing tank 7 is discharged into the valve casing pipe 9 easily through the ventilation holes 901. Preferably, the sealing ring 16 is arranged on the upper side of the sealing plate 14, and the sealing ring 16 corresponds to the sealing casing pipe 12. Specifically, the ring-installing groove fitting in with the sealing ring 16 is arranged on the sealing plate 14, when the return spring 15 is reset, the sealing plate 14 leans against the lower end of the sealing casing pipe 12, and the sealing ring 16 plugs the bottom of the sealing casing pipe 12, so as to reduce air leakage. Preferably, the safety valve 17 is arranged on the air-storing tank 7, and the unidirectional valve 18 is arranged on the inflation pipe 6. The safety valve 17 is used to control the pressure inside the air-storing tank 7, when the inflation volume of the air-storing tank 7 exceeds its bearable pressure, the safety valve 17 opens to discharge the air, so as to ensure the safety of the air-storing tank 7. The unidirectional valve 18 is configured to prevent the air pumped into the air bag 2 from flowing backwards into the air-storing tank 7 under the pressure of water pressure and the disturbance of water flow, and affecting the effect of leaking stoppage. Preferably, as shown in FIG. 8, the upper end of the valve rod 11 extends to the upward aspect of the water gate 1, and the casing pipe 19 fitting in with the valve rod 11 is arranged on the water gate 1 to guide the valve rod 11, avoiding the valve rod 11 from deflecting during its up-and-down movement. The valve rod 11 is arranged below the gravity water-filling valve 20, the detachable heel block 21 is arranged between the gravity water-filling valve 20 and the top of the water gate 1, the top of the detachable heel block 21 is over the top of the valve rod 11, and the heel block groove 101 fitting in with the detachable heel block 21 is arranged on the top of the water gate 1. The gravity water-filling valve 20 on the water gate is usually used to fill the cavity behind the water gate with water to generate the horizontal pressure capable of lifting the water gate again, even if it is not necessary to fill the cavity behind the water gate with water, the gravity water-filling valve 20 arranged at the top of the water gate can inflate the air bag 2. When leaking stoppage is need, the detachable heel block 21 is removed, then the valve cover of the gravity water-filling valve 20 drops after falling the water gate to press downwards the valve rod 11, and actuates the airbag-inflating valve mechanism, which inflates the airbag 2 through the inflation pipe 6, finally the airbag 2 unfolds after finishing inflation. No need to start the inflation of the air bag is possible during the falling of the valve cover of the gravity water-filling valve 20. For example, the water gate is maintained above the water surface, when no need to start inflation, the detachable heel block 21 is placed under the valve cover of the gravity water-filling valve 20, and because the top of the detachable heel block 21 is over the top of the valve rod 11, it is also removed to hold the valve cover of the gravity water-filling valve 20 during the latter’s falling, thus, the airbag-inflating valve mechanism cannot be actuated to inflate the airbag 2. Preferably, a plurality of airbag-shaping baffle 22 are arranged inside the front end of the airbag 2, and the airbag-shaping baffles 22 are distributed in the length direction of the airbag 2, and connected to the inside of the airbag 2. Each airbag-shaping baffle 22 is preferably connected with the material of the airbag 2 by means of heat seal impaction. The airbag-shaping baffles 22 are rotationally installed on the baffle handle 23, which is arranged at the end of the airbag 2, and the airbag-shaping baffle 22 can rotate to fit in with various shapes of jamming matter at the bottom of the water gate. As the shape of the jamming matter and the jamming position at the bottom of water gate 1 are both different, the shape of the hole to be plugged is also different. Preferably, as the airbag-shaping baffle 22 is made from metal materials, the leaking-stoppage front end of the airbag 2 is effectively strengthened, so that after the airbag 2 is unfolded, it can be effectively jammed between the bottom of water gate 1 and the flow-passing bottom plate together with the airbag 2, so that it is easy to plug the leaking hole. Instead of hard connections, soft connections such as connection by rubbers or chains are adopted between each airbag-shaping baffle 22 so as to cope with the shape of the jamming matter. The airbag-shaping baffles 22 effectively expand to each other, so as to form a curved waterproof shape, achieving an optional waterproof effect. As shown in FIG.4, the airbag protrusion 201 is arranged on both sides of the front end of the airbag 2, and the cavity of the airbag protrusion 201 is communicated with the airbag 2. Because in the case that the jamming matter causes water leaking of the water gate, the airbag 2 and the waterproof bottoms at its both sides are weak points of water leaking, so that leaking holes are prone to occur. While the airbag 2 is inflated, due to the integrated communicating structure between the airbag protrusion 201 and the airbag 2, the airbag protrusion 201 is also filled with air to expand, and can be automatically squeezed into the leaking holes under the suction force arising from the leaking water of the leaking holes at both ends, so as to plug the leaking holes at both ends. This process is such done automatically by suction force arising from leaking water, so it is not only very reliable, but also ingenious and simple in design. Preferably, the outlet valve 24 and the leak-detecting inlet valve 25 are arranged on the airbag 2. After the airbag 2 has been used, it can be lifted with the water gate 1 and discharges air by means of a manual method through the outlet valve 24 arranged at the bottom of the airbag. After the airbag 2 has been folded, it is rehung at the hook 5 of the bottom of the water gate 1 for repeated use. The airbag 2 is further provided with the leak-detecting inlet valve 25, so as to repair the leaking part of the airbag 2 after carrying out temporary inflation and leak detection prior to use. An operation method of an automatic air-inflation and leaking-stoppage device of a water gate includes the following steps. SI. Hanging the airbag 2 on the hook 5 by means of the sling 4, then normally starting the water gate 1. S2. When water leaking occurs at the bottom of the water gate 1, enabling the valve cover of the gravity water-filling valve 20 to fall, then pressing downwards the valve rod 11 only under the gravity of the gravity water-filling valve 20 instead of external power by adopting the gravity water-filling valve structure in the water gate itself, next actuating the airbag-inflating valve mechanism, which inflates the airbag 2 through the inflation pipe 6, next enabling the air bag 2 under the action of the high pressure of the gas-storing tank 7 to dilate to riven the sling 4 and quickly expand, then quickly fill the leaking gap, driven by the high-speed leaking water flow in the leaking hole at the bottom of the water gate 1, finally stopping inflating automatically after the pressure in the air-storing tank 7 and the air bag 2 has balanced. S3. In the case that the jamming matter causes water leaking of the water gate 1, filling the airbag protrusion 201 with air to expand, meanwhile inflating the airbag 2, then enabling the airbag protrusion 201 to plug the leaking holes at both ends under the suction force arising from the leaking water of the leaking holes at both ends, next stopping inflating automatically after the pressure in the air-storing tank 7 and the air bag 2 has balanced. S4. Lifting the water gate 1 after operation to enable the airbag 2 to rise with the water gate 1, thus resetting the gravity water-filling valve 20, then enabling the lower cone valve 10 to reset upwards under the action of the return spring 15, next closing the inflation pipe 6 and deflating the airbag 2 through the outlet valve 24, finally reusing the airbag 2 by hanging the sling 4 on the hook 5 after the airbag 2 has shrunk.

Claims

1. An automatic air-inflation and leaking-stoppage device of a water gate, comprising an airbag (2), waterproof bottom (3), a sling (4), a hook (5), an inflation pipe (6), an air-storing tank (7), a reflating unidirectional valve (8) and an airbag-inflating valve mechanism;wherein said airbag (2) is arranged at the bottom of the water gate (1), the front end of said airbag (2) is connected to said waterproof bottom (3) at the bottom of the water gate (1), the upper side of the rear end of said airbag (2) is hung on said hook (5) by means of said sling (4), said hook (5) is fixed on the inner wall of the water gate (1), said air bag (2) is connected to said air-storing tank (7) by means of said inflation pipe (6), said air-storing tank (7) is fixed on the inside of the water gate (1) and provided with said reflating unidirectional valve (8), and the connection portion between said air-storing tank (7) and said inflation pipe (6) is provided with said airbag-inflating valve mechanism.

2. The automatic air-inflation and leaking-stoppage device of a water gate according to claim 1, wherein said air bag-inflating valve mechanism includes a valve casing-pipe (9) arranged at the connection portion between said air-storing tank (7) and said inflation pipe (6), the valve casing-pipe (9) is arranged inside said air-storing tank (7), and fits in with a lower cone valve (10), which enlarges from top to bottom, and at the top of which a valve rod (11) is arranged, a sealing casing-pipe (12) fitting with the valve rod (11) is arranged at the top of said air-storing tank (7), a casing-pipe-sealing ring (13) is arranged inside the sealing casing-pipe (12), a sealing plate (14) is arranged on the valve rod (11), and a return spring (15) is arranged between the sealing plate (14) and the lower cone valve (10).

3. The automatic air-inflation and leaking-stoppage device of a water gate according to claim 1, wherein a sealing ring (16) is arranged on the upper side of the sealing plate (14), and the sealing ring (16) corresponds to the sealing casing-pipe (12).

4. The automatic air-inflation and leaking-stoppage device of a water gate according to claim 1, wherein a safety valve (17) is arranged on said air-storing tank (7), and an unidirectional valve (18) is arranged on said inflation pipe (6).

5. The automatic air-inflation and leaking-stoppage device of a water gate according to claim 2, wherein a plurality of ventilation holes (901) are arranged on the valve casing-pipe (9).

6. The automatic air-inflation and leaking-stoppage device of a water gate according to claim 1, wherein the upper end of the valve rod (11) extends to the upward aspect of the water gate (1), a casing-pipe (19) fitting in with the valve rod (11) is arranged on the water gate (1), the valve rod (11) is arranged below a gravity water-filling valve (20), a detachable heel block (21) is arranged between the gravity water-filling valve (20) and the top of the water gate (1), the top of the detachable heel block (21) is over the top of the valve rod (11), and a heel block groove (101) fitting in with the detachable heel block (21) is arranged on the top of the water gate (1).

7. The automatic air-inflation and leaking-stoppage device of a water gate according to claim 1, wherein a plurality of airbag-shaping baffles (22) are arranged inside the front end of said airbag (2), connected to the inside of the airbag (2), and rotationally installed on a baffle handle (23).

8. The automatic air-inflation and leaking-stoppage device of a water gate according to claim 1, wherein an airbag protrusion (201) is arranged on both sides of the front end of said airbag (2), and the airbag protrusion (201) is communicated with said airbag (2).

9. The automatic air-inflation and leaking-stoppage device of a water gate according to claim 1, wherein an outlet valve (24) and a leak-detecting inlet valve (25) are arranged on said airbag (2).

10. An operation method of an automatic air-inflation and leaking-stoppage device of a water gate comprising the following steps:SI. hanging an airbag (2) on a hook (5) by means of a sling (4), then normally starting the water gate (1);S2. when water leaking occurs at the bottom of the water gate (1), enabling the valve cover of a gravity water-filling valve (20) to fall, then pressing downwards a valve rod (11), next actuating a airbag-inflating valve mechanism, which inflates the airbag (2) through an inflation pipe (6), next enabling the air bag (2) under the action of the high pressure of a gas-storing tank (7) to dilate to riven the sling (4) and quickly expand, then quickly fill the leaking gap, driven by the high-speed leaking water flow in the leaking hole at the bottom of the water gate (1), finally stopping inflating automatically after the pressure in the air-storing tank (7) and the air bag (2) has balanced;S3, in the case that the jamming matter causes water leaking of the water gate (1), filling an airbag protrusion (201) with air to expand, meanwhile inflating the airbag (2), then enabling the airbag protrusion (201) to plug the leaking holes at both ends under the suction force arising from the leaking water of the leaking holes at both ends, next stopping inflating automatically after the pressure in the air-storing tank (7) and the air bag (2) has balanced; andS4. lifting the water gate (1) after operation to enable the airbag (2) to rise with the water gate (1), thus resetting the gravity water-filling valve (20), then enabling a lower cone valve (10) to reset upwards under the action of a return spring (15), next closing the inflation pipe (6) and deflating the airbag (2) through an outlet valve (24), finally reusing the airbag (2) by hanging the sling (4) on the hook (5) after the airbag (2) has shrunk.PCT / CN2022 / 125148A. CLASSIFICATION OF SUBJECT MATTERE02B 7 / 54(2006.01)1According to International Patent Classification (IPC) or to both national classification and IPCB. FIELDS SEARCHEDMinimum documentation searched (classification system followed by classification symbols) E02BDocumentation searched other than minimum documentation to the extent that such documents are included in the fields searchedElectronic data base consulted during the international search (name of data base and, where practicable, search terms used)CNABS, CNTXT, DWPI, WPABS, ENTXTC, CNKI, ISI Web of Science: WiSH, WIW, 1inflation pipe, wimbleDOCUMENTS CONSIDERED TO BE RELEVANTCategory* Citation of document, with indication, where appropriate, of the relevant passages Relevant to claim No. PX CN 114855719 A (CHINA THREE GORGES CORPORATION et al.) 05 August 2022 (2022-08-05) description, paragraphs 18-40, and figures 1-8 1-10 X CN 208235461 U (ZHAO WENJUN) 14 December 2018 (2018-12-14) description, paragraphs 33-37, and figures 1-4 1,4, 7-9 Y CN 208235461 U (ZHAO WENJUN) 14 December 2018 (2018-12-14) description, paragraphs 33-37, and figures 1-4 2-3, 5-6, 10 Y CN 204383734 U (MILITARY TRANSPORTATION RESEARCH INSTITUTE OF PLAGENERAL LOGISTICS DEPARTMENT) 10 June 2015 (2015-06-10) description, paragraphs 23-37, and figures 1-5 2-3, 5-6, 10 X CN 213358533 U (JIANGSU FIVE-RINGS WATER SYSTEM ENGINEERING CO., LTD.) 04 June 2021 (2021-06-04) description, paragraphs 14-17, and figures 1-2 1, 4, 7-9 Y CN 213358533 U (JIANGSU FIVE-RINGS WATER SYSTEM ENGINEERING CO., LTD.) 04 June 2021 (2021-06-04) description, paragraphs 14-17, and figures 1-2 2-3, 5-6, 10| | Further documents are listed in the continuation of Box C. | J | See patent family annex.* Special categories of cited documents:“A” document defining the general state of the art which is not considered“O”“P”to be of particular relevanceearlier application or patent but published on or after the international filing datedocument which may throw doubts on priority claim(s) or which is cited to establish the publication date of another citation or other special reason (as specified)document referring to an oral disclosure, use, exhibition or other meansdocument published prior to the international filing date but later than the priority date claimed“T” later document published after the international filing date or priority date and not in conflict with the application but cited to understand the principle or theory underlying the invention“X” document of particular relevance; the claimed invention cannot be considered novel or cannot be considered to involve an inventive step when the document is taken alone‘Y’document of particular- relevance; the claimed invention cannot be considered to involve an inventive step when the document is combined with one or more other such documents, such combination being obvious to a person skilled in the aitdocument member of the same patent familyDate of the actual completion of the international searchDate of mailing of the international search report01 December 202221 December 2022Name and mailing address of the ISA / CNChina National Intellectual Property Administration (ISA / CN)No. 6, Xitucheng Road, Jimenqiao, Haidian District, Beijing 100088, ChinaFacsimile No. (86-10)62019451Authorized officerTelephone No.PCT / CN2022 / 125148C. DOCUMENTS CONSIDERED TO BE RELEVANT Category* Citation of document, with indication, where appropriate, of the relevant passages Relevant to claim No. X CN 212103933 U (CHINA WATER RESOURCES PEARL RIVER PLANNING SURVEYING &DESIGNING CO., LTD.) 08 December 2020 (2020-12-08) description, paragraphs 23-32, and figures 1-2 1, 4, 7-9 Y CN 212103933 U (CHINA WATER RESOURCES PEARL RIVER PLANNING SURVEYING &DESIGNING CO., LTD.) 08 December 2020 (2020-12-08) description, paragraphs 23-32, and figures 1-2 2-3, 5-6, 10 A CN 206396728 U (LUOYUN HYDRAULIC PROJECT MANAGEMENT DIVISION OF JIANGSU PROVINCE) 11 August 2017 (2017-08-11) entire document 1-10 A US 2019063026 Al (OBERMEYER H. K.) 28 February 2019 (2019-02-28) entire document 1-10International application No.PCT / CN2022 / 125148Patent document cited in search report Publication date (day / month / year) Patent family member)s) Publication date (day / month / year) CN 114855719 A 05 August 2022 None CN 208235461 U 14 December 2018 None CN 204383734 U 10 June 2015 None CN 213358533 U 04 June 2021 None CN 212103933 U 08 December 2020 None CN 206396728 U 11 August 2017 None US 2019063026 Al 28 February 2019 US 2020299915 Al 24 September 2020 WO 2017147349 Al 31 August 2017 CN 109312550 A 05 February 2019

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