An underwater life-saving device for fire rescue

Abstract

The present invention relates to the field of fire fighting and rescue, and particularly to an underwater rescue device for fire fighting and rescue. The existing devices are not highly safe enough, lack stability during underwater rescue, are prone to potential safety hazards, and are not convenient for quickly diving into the water, thus reducing the rescue efficiency. An underwater rescue device for fire fighting and rescue includes an arc-shaped panel, etc.; one end of the arc-shaped panel is fixedly connected to a first soft belt, the other end of the arc-shaped panel is fixedly connected to a second soft belt, a hook surface of a magic tape is fixedly connected to one side surface of the first soft belt, and a fuzzy surface of a magic tape is fixedly connected to one side surface of the second soft belt. Since the arc-shaped panel is located at the abdomen of the wearer and the buoyancy tanks are all distributed at the abdomen position of the wearer, the buoyancy received by the buoyancy tanks will cause the wearer to always maintain a face-up posture during the process of floating to the water surface and after surfacing, thus reducing the risk of asphyxiation of the wearer.

Description

Technical Field

[0001] The present invention relates to the field of fire fighting and rescue, and particularly to an underwater rescue device for fire fighting and rescue. Background Art

[0002] In real life, due to the insufficient awareness of personal safety of people, situations such as people drowning often occur. In such cases, fire fighters need to quickly carry out rescue operations to timely ensure the safety of people's lives and property.

[0003] However, the existing devices are not highly safe enough, lack stability during underwater rescue, are prone to potential safety hazards, and are not convenient for quickly diving into the water, thus reducing the rescue efficiency. Summary of the Invention

[0004] In order to overcome the shortcomings in the background art, the technical problem of the present invention is: to provide an underwater rescue device for fire fighting and rescue that improves safety, enhances stability, reduces the probability of potential safety hazards, and is convenient for quickly diving, thereby improving the rescue efficiency.

[0005] The technical implementation solution of the present invention is: an underwater rescue device for fire fighting and rescue, including an arc-shaped panel. One end of the arc-shaped panel is fixedly connected with a first soft belt, and the other end of the arc-shaped panel is fixedly connected with a second soft belt. A hook surface of a magic tape is fixedly connected to one side surface of the first soft belt, and a loop surface of the magic tape is fixedly connected to one side surface of the second soft belt. A floating mechanism is arranged on one side of the arc-shaped panel, and the floating mechanism is used to assist fire fighters in floating and sinking in the water. A water supply and drainage mechanism is arranged on the floating mechanism, and the water supply and drainage mechanism is used to inject or discharge water into the floating mechanism.

[0006] More preferably, the floating mechanism includes a fixed beam, the fixed beam is fixedly connected to one side of the arc-shaped panel, and a plurality of buoyancy tanks are fixedly connected to the fixed beam. The buoyancy tanks are of a hollow structure, two fan-shaped holes are opened in the upper part of the buoyancy tanks, a plurality of anti-slip strips are fixedly connected to the inner side walls of the first soft belt and the second soft belt close to the arc-shaped panel, and a plurality of soft pads are fixedly connected to the side of the arc-shaped panel away from the fixed beam.

[0007] More preferably, the water supply and drainage mechanism includes a floating disk, a two-way air pump is fixedly connected to the floating disk, a connecting pipe frame is fixedly connected between the upper parts of a plurality of the buoyancy tanks, the inside of the connecting pipe frame is communicated with the inside of a plurality of the buoyancy tanks, a connecting long pipe is connected between the lower part of the two-way air pump and the connecting pipe frame, and a switch button is fixedly connected to the side of the arc-shaped panel close to the fixed beam. The switch button is used to control the working state of the two-way air pump.

[0008] More preferably, an air leakage prevention mechanism is further included. The air leakage prevention mechanism is arranged at the lower parts of several of the buoyancy tanks. The air leakage prevention mechanism is used to prevent the air filled in the buoyancy tanks from escaping. The air leakage prevention mechanism includes several connecting pipes. The several connecting pipes are respectively fixedly connected to the lower parts of the several buoyancy tanks. A downward pull flexible pipe is fixedly connected to the lower part of each of the several connecting pipes. The inside of the downward pull flexible pipe is communicated with the inside of the connecting pipe and the inside of the buoyancy tank. A rotating ring is rotatably connected to the lower part of each downward pull flexible pipe. Swing rods are rotatably connected to both sides of each rotating ring. A lead weight is fixedly connected to the lower end of each swing rod. A ball valve is rotatably connected to each connecting pipe. Gravity rods are rotatably connected to both sides of each ball valve. A blocking net is fixedly connected to the lower end of each downward pull flexible pipe.

[0009] More preferably, a quick diving mechanism is further included. The quick diving mechanism is arranged on the fixed beam. The quick diving mechanism is used to open the buoyancy tanks so that the buoyancy tanks can quickly fill with water and sink. The quick diving mechanism includes several rotating disks. Three of the rotating disks form a group. The several rotating disks are respectively rotatably connected to the upper parts of the several buoyancy tanks. Grooves are formed on the side surfaces of the rotating disks. A torsion spring is connected between the rotating disk and the buoyancy tank. Open-hole plates are fixedly connected to the upper parts of the several rotating disks. Two communication holes are formed in the open-hole plates. Three of the open-hole plates form a group. The open-hole plates are in contact with the upper surfaces of the buoyancy tanks. Two guide columns are fixedly connected to the fixed beam. Three guide grooves are arranged on the guide columns. Two multi-tube guide frames are fixedly connected to one side of the fixed beam. Three through holes are formed in the multi-tube guide frames. Connecting ropes are connected to each group of three rotating disks. A part of each connecting rope is wound in the groove on the side surface of the rotating disk and is connected to the three rotating disks in the same group. The three connecting ropes connected to the three rotating disks in the same group all bypass one of the guide columns, and the three connecting ropes are respectively located in the guide grooves on the guide column. The three connecting ropes connected to the three rotating disks in the same group all pass through one of the multi-tube guide frames, and the three connecting ropes respectively pass through the through holes in the multi-tube guide frame. A pull ring is fixedly connected between the three connecting ropes connected to the three rotating disks in the same group. The pull ring is in contact with one side of the multi-tube guide frame.

[0010] Compared with the prior art, the present invention has the following advantages: 1. The wearer presses the switch button to control the two-way air pump to evacuate each buoyancy tank through the connecting long pipe and the communicating pipe rack for a certain period of time. Then, after the air in the buoyancy tank is evacuated, water enters the inside from the lower part of the buoyancy tank and fills the inside of the buoyancy tank. The buoyancy received by the buoyancy tank decreases, enabling the wearer to dive underwater. When the wearer presses the switch button again underwater, it will control the two-way air pump to inflate each buoyancy tank. Inflating the buoyancy tank will squeeze out the water filled inside the buoyancy tank from the lower part, so that the inside of the buoyancy tank is filled with air again. The buoyancy received by the buoyancy tank filled with air inside will increase, and the buoyancy tank with increased buoyancy will drive the arc panel and then drive the wearer to float to the water surface. Since the arc panel is located at the abdomen of the wearer and the buoyancy tanks are all distributed at the abdominal position of the wearer, the buoyancy received by the buoyancy tanks will keep the wearer in a face-up posture during the process of floating to the water surface and after emerging from the water surface, thus reducing the risk of asphyxiation for the wearer.

[0011] 2. When the wearer moves underwater, the arc panel and the buoyancy tanks will tilt together with the inclination of the wearer's body. Then, the inclination of the buoyancy tank will drive the connecting pipe to tilt together. Due to the influence of gravity, the lead weight will keep the nozzle at the lower part of the downward pull hose facing downward all the time, and the gravity rod will drive the ball valve to rotate. When the wearer's body tilts at a certain angle and the connecting pipe tilts at a certain angle together, the ball valve rotates at a certain angle, causing the ball valve to be in a closed state, and the buoyancy tank and the downward pull hose are no longer connected. Therefore, when the wearer needs to float underwater, they need to keep their body in a vertical state and then press the switch button to float. Then, the ball valve can change the conduction state according to the inclination of the wearer's body, so that the air filled in the buoyancy tank when the wearer floats is not easily escaped due to the excessive inclination amplitude of the wearer's body, thereby causing the buoyancy to decrease. And when the wearer floats to the water surface and lies on the water surface with their abdomen facing up, the downward pull hose will bend downward under the influence of the lead weight, so that the nozzle at the lower part of the downward pull hose is always located in the water, preventing the gas in the buoyancy tank from leaking out. This enables the wearer to continuously float on the water surface, making the device more stable during the underwater rescue of the wearer and not easily having potential safety hazards.

[0012] 3. Initially, the opening piece will block the fan-shaped holes at the upper part of the buoyancy tank. When the wearer puts on the device and enters the water, and places the floating disc and the two-way air pump on the water surface, the wearer can pull the pull ring in the direction away from the abdomen. The pull ring will drive the rotating disc to rotate and move an angle through the connecting rope, and the torsion spring is twisted. Then, the rotation of the rotating disc will drive the opening piece to rotate a certain angle together, so that the communication holes on the opening piece are aligned with the fan-shaped holes at the upper part of the buoyancy tank, enabling the buoyancy tank to communicate with the outside through the fan-shaped holes at the upper part. Then, water can enter the interior through the fan-shaped holes at the upper part of the buoyancy tank, allowing the buoyancy tank to be quickly filled with water. There is no longer a need to control the two-way air pump to pump air to fill the buoyancy tank, thus making it easier for the wearer to achieve rapid sinking and improving the efficiency of fire rescue. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a three-dimensional structural schematic diagram of the present invention.

[0014] Figure 2 It is a three-dimensional structural schematic diagram of the floating mechanism and the water supply and drainage mechanism of the present invention.

[0015] Figure 3 It is a three-dimensional structural schematic diagram of the floating mechanism of the present invention.

[0016] Figure 4 It is a three-dimensional structural schematic diagram of the air leakage prevention mechanism of the present invention.

[0017] Figure 5 It is a partial three-dimensional structural schematic diagram of the air leakage prevention mechanism of the present invention.

[0018] Figure 6 It is a sectional three-dimensional structural schematic diagram of the buoyancy tank and the connecting pipe of the present invention.

[0019] Figure 7 It is a three-dimensional structural schematic diagram of the pull-down hose and the blocking net of the present invention.

[0020] Figure 8 It is a three-dimensional structural schematic diagram of the quick diving mechanism of the present invention.

[0021] Figure 9 It is a separated three-dimensional structural schematic diagram of the buoyancy tank, the rotating disc, the opening piece and the connecting rope of the present invention.

[0022] Figure 10 It is a partial three-dimensional structural schematic diagram of the quick diving mechanism of the present invention.

[0023] Figure 11 For the present invention Figure 10 The enlarged three-dimensional structural schematic diagram at position A.

[0024] The markings of each component in the attached drawings are as follows: 1. Arc panel, 21. First soft belt, 22. Second soft belt, 31. Hook surface of Velcro, 32. Loop surface of Velcro, 41. Fixed beam, 42. Buoyancy tank, 43. Anti-slip strip, 44. Soft pad, 51. Floating disc, 52. Two-way air pump, 53. Connecting pipe rack, 54. Connecting long pipe, 55. Switch button, 61. Connecting pipe, 62. Pull-down hose, 63. Rotating ring, 64. Swing rod, 65. Plumb bob, 66. Ball valve, 67. Gravity rod, 68. Barrier net, 71. Rotating disc, 72. Torsion spring, 73. Perforated plate, 74. Guide post, 75. Multi-pipe guide rack, 76. Connecting rope, 77. Pulling ring. Detailed implementation mode

[0025] The technical solutions in the embodiments of the present invention will be described clearly and completely below. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0026] Embodiment 1

[0027] An underwater rescue device for fire fighting and rescue, as Figures 1 - 11 shown, includes an arc panel 1. One end of the arc panel 1 is fixedly connected with a first soft belt 21, and the other end of the arc panel 1 is fixedly connected with a second soft belt 22. A hook surface 31 of Velcro is fixedly connected to one side surface of the first soft belt 21, and a loop surface 32 of Velcro is fixedly connected to one side surface of the second soft belt 22. A floating-up mechanism is arranged on one side of the arc panel 1, and the floating-up mechanism is used to assist firefighters to float and sink in water. A water supply and drainage mechanism is arranged on the floating-up mechanism, and the water supply and drainage mechanism is used to inject or discharge water into the floating-up mechanism.

[0028] The floating-up mechanism includes a fixed beam 41, and the fixed beam 41 is fixedly connected to one side of the arc panel 1. A number of buoyancy tanks 42 are fixedly connected to the fixed beam 41. The buoyancy tanks 42 are of a hollow structure. Two sector holes are opened in the upper part of the buoyancy tanks 42. A number of anti-slip strips 43 are fixedly connected to the inner side walls of the first soft belt 21 and the second soft belt 22 close to the arc panel 1. A number of soft pads 44 are fixedly connected to the side of the arc panel 1 away from the fixed beam 41.

[0029] The water supply and drainage mechanism includes a floating disk 51, on which a two-way air pump 52 is fixedly connected. A connecting pipe rack 53 is fixedly connected between the upper parts of a number of buoyancy tanks 42. The inside of the connecting pipe rack 53 is communicated with the inside of the number of buoyancy tanks 42. A connecting long pipe 54 is connected between the lower part of the two-way air pump 52 and the connecting pipe rack 53. A switch button 55 is fixedly connected to one side of the arc-shaped panel 1 close to the fixed beam 41. The switch button 55 is used to control the working state of the two-way air pump 52.

[0030] In actual work, the wearer first places the arc-shaped panel 1 on the abdomen, and then makes the soft belt two 22 close to the surface of the soft belt one 21, so that the hook surface 31 of the magic tape is buckled with the fuzzy surface 32 of the magic tape, thereby wearing the device at the waist and abdomen position, and making the direction of the switch button 55 face the front of the wearer. The soft pad 44 on the arc-shaped panel 1 can adapt to the body shapes of different people. The anti-slip strips 43 on the soft belt one 21 and the soft belt two 22 can be close to the back of the wearer, and make the arc-shaped panel 1 not easy to displace. After the wearer wears the arc-shaped panel 1 to the abdominal position, the wearer enters the water again, so that the buoyancy tank 42 and the arc-shaped panel 1 are both below the water surface, and the floating disk 51 and the two-way air pump 52 are placed on the water surface. The two-way air pump 52 and the floating disk 51 will always float on the water surface due to buoyancy. Since the buoyancy tank 42 enters the water with the lower opening facing downwards, the air in the buoyancy tank 42 will be blocked by water. At this time, the buoyancy tank 42 will receive a certain buoyancy in the water. Then the wearer presses the switch button 55 to control the two-way air pump 52 to pump air into each buoyancy tank 42 through the connecting long pipe 54 and the connecting pipe rack 53 for a certain period of time. Then, after the air in the buoyancy tank 42 is pumped out, water enters the inside from the lower part of the buoyancy tank 42 and fills the inside of the buoyancy tank 42. The buoyancy received by the buoyancy tank 42 decreases, so that the wearer can dive in the water. When the wearer presses the switch button 55 again in the water, it will control the two-way air pump 52 to inflate each buoyancy tank 42. Inflating the inside of the buoyancy tank 42 will squeeze out the water filled in the inside of the buoyancy tank 42 from the lower part, so that the inside of the buoyancy tank 42 is filled with air again. The buoyancy received by the buoyancy tank 42 filled with air inside will increase, and the buoyancy tank 42 with increased buoyancy will drive the arc-shaped panel 1 and then drive the wearer to float to the water surface. Since the arc-shaped panel 1 is located on the abdomen of the wearer, and the buoyancy tanks 42 are all distributed at the abdominal position of the wearer, the buoyancy received by the buoyancy tanks 42 will make the wearer always keep the face up during the process of floating to the water surface and after surfacing, thus reducing the risk of suffocation of the wearer.

[0031] Embodiment 2

[0032] On the basis of Embodiment 1, as Figures 4 - 7As shown, it further includes an air leakage prevention mechanism, which is arranged at the lower part of several of the buoyancy tanks 42. The air leakage prevention mechanism is used to prevent the air filled in the buoyancy tanks 42 from escaping. The air leakage prevention mechanism includes several connecting pipes 61, and several of the connecting pipes 61 are respectively fixedly connected to the lower parts of several of the buoyancy tanks 42. The lower parts of several of the connecting pipes 61 are all fixedly connected with a downward hose 62. The inside of the downward hose 62 is communicated with the inside of the connecting pipe 61 and the inside of the buoyancy tank 42. The lower part of each downward hose 62 is rotatably connected with a rotating ring 63. Both sides of each rotating ring 63 are rotatably connected with a swinging rod 64. The lower end of each swinging rod 64 is fixedly connected with a lead weight 65. A ball valve 66 is rotatably connected in each connecting pipe 61. Both sides of each ball valve 66 are rotatably connected with a gravity rod 67. A blocking net 68 is fixedly connected to the lower end of each downward hose 62. The blocking net 68 is used to block waterweeds or sundries in the water from entering the downward hose 62.

[0033] At first, when the connecting pipe 61 is perpendicular to the ground, the ball valve 66 is in a conducting state. When the wearer is underwater, due to gravity, the nozzle of the downward hose 62 faces downward. When the wearer moves in the water, the arc panel 1 and the buoyancy tank 42 will tilt together with the tilt of the wearer's body. Then the tilt of the buoyancy tank 42 will drive the connecting pipe 61 to tilt together. When the connecting pipe 61 tilts, under the influence of gravity, the lead weight 65 will keep the nozzle at the lower part of the downward hose 62 facing downward all the time, and the gravity rod 67 will drive the ball valve 66 to rotate. When the wearer's body tilts by a certain angle and the connecting pipe 61 tilts by a certain angle together, the ball valve 66 rotates by a certain angle, making the ball valve 66 in a closed state, and the buoyancy tank 42 is no longer communicated with the downward hose 62. So when the wearer needs to float up in the water, he / she should keep the body in a vertical state and then press the switch button 55 to float up. Then the ball valve 66 can change the conducting state along with the tilt degree of the wearer's body. In this way, when the wearer floats up, the air filled in the buoyancy tank 42 is not easy to escape due to the excessive tilt amplitude of the wearer's body, thus preventing the buoyancy from decreasing. And when the wearer floats to the water surface and floats on the water surface with the abdomen facing up, under the influence of the lead weight 65, the downward hose 62 will bend downward, making the nozzle at the lower part of the downward hose 62 always located in the water, preventing the gas in the buoyancy tank 42 from leaking out. In this way, the wearer can continuously float on the water surface. The blocking net 68 at the nozzle of the lower part of the downward hose 62 can prevent waterweeds or sundries in the water from being sucked into the buoyancy tank 42, making the device more stable during the underwater rescue of the wearer and not easy to have potential safety hazards.

[0034] Embodiment 3

[0035] On the basis of Embodiment 2, as Figures 8 - 11As shown in the figure, it further includes a quick diving mechanism. The quick diving mechanism is arranged on the fixed beam 41. The quick diving mechanism is used to open the buoyancy tank 42 so that the buoyancy tank 42 can quickly fill with water for sinking. The quick diving mechanism includes a number of rotating disks 71. Three of the rotating disks 71 form a group. The number of rotating disks 71 are respectively rotatably connected to the upper parts of a number of buoyancy tanks 42. Grooves are formed on the sides of the rotating disks 71. A torsion spring 72 is connected between the rotating disk 71 and the buoyancy tank 42. The upper parts of the number of rotating disks 71 are fixedly connected with perforated plates 73. Two communication holes are formed on the perforated plates 73. Three of the perforated plates 73 form a group. The perforated plates 73 are in contact with the upper surfaces of the buoyancy tanks 42. Two guide columns 74 are fixedly connected to the fixed beam 41. Three guide grooves are provided on the guide columns 74. Two multi-tube guide frames 75 are fixedly connected to one side of the fixed beam 41. Three through holes are formed on the multi-tube guide frames 75. A connecting rope 76 is connected to each of the three rotating disks 71 in each group. And a part of the connecting rope 76 is wound in the groove on the side of the rotating disk 71. The three connecting ropes 76 connected to the three rotating disks 71 in the same group all bypass one of the guide columns 74. And the three connecting ropes 76 are respectively located in the guide grooves on the guide column 74. The guide column 74 is used to respectively guide different connecting ropes 76. The three connecting ropes 76 connected to the three rotating disks 71 in the same group all pass through one of the multi-tube guide frames 75. And the three connecting ropes 76 respectively pass through the through holes on the multi-tube guide frames 75. A pull ring 77 is fixedly connected between the three connecting ropes 76 connected to the three rotating disks 71 in the same group. The pull ring 77 is in contact with one side of the multi-tube guide frame 75.

[0036] At first, the perforated plate 73 will block the fan-shaped holes on the upper part of the buoyancy tank 42. When the wearer wears the device and enters the water, and places the floating disk 51 and the two-way air pump 52 on the water surface, the wearer can pull the pull ring 77 in the direction away from the abdomen. The pull ring 77 will drive the rotating disk 71 to rotate and move an angle through the connecting rope 76. The torsion spring 72 is twisted. Then the rotation of the rotating disk 71 will drive the perforated plate 73 to rotate a certain angle together, so that the communication holes on the perforated plate 73 are aligned with the fan-shaped holes on the upper part of the buoyancy tank 42, so that the buoyancy tank 42 is communicated with the outside through the fan-shaped holes on the upper part. Then water can enter the inside through the fan-shaped holes on the upper part of the buoyancy tank 42, so that the buoyancy tank 42 can be quickly filled with water. It is no longer necessary to control the two-way air pump 52 to pump air to fill the buoyancy tank 42, so that it is more convenient for the wearer to quickly sink, improving the efficiency of fire fighting and rescue. When the buoyancy tank 42 is filled with water, the wearer then releases the pull ring 77. The torsion spring 72 drives the rotating disk 71 to rotate and reset, and the rotating disk 71 pulls the connecting rope 76 and the pull ring 77 to reset.

[0037] Although the present disclosure has been shown and described with reference to specific exemplary embodiments thereof, those skilled in the art should understand that various changes in form and detail may be made therein without departing from the spirit and scope of the present disclosure as defined by the appended claims and their equivalents. Accordingly, the scope of the present disclosure should not be limited to the above-described embodiments, but should be determined not only by the appended claims but also by the equivalents of the appended claims.

Claims

1. An underwater life-saving device for fire rescue, characterized in that, It includes an arc-shaped panel (1). One end of the arc-shaped panel (1) is fixedly connected to a first soft belt (21), and the other end of the arc-shaped panel (1) is fixedly connected to a second soft belt (22). A hook surface of Velcro (31) is fixedly connected to one side surface of the first soft belt (21), and a loop surface of Velcro (32) is fixedly connected to one side surface of the second soft belt (22). A floating mechanism is arranged on one side of the arc-shaped panel (1). The floating mechanism is used to assist firefighters in floating and sinking in water. A water supply and drainage mechanism is arranged on the floating mechanism. The water supply and drainage mechanism is used to inject or discharge water into the floating mechanism; the floating mechanism includes a fixed beam (41). The fixed beam (41) is fixedly connected to one side of the arc-shaped panel (1). A number of buoyancy tanks (42) are fixedly connected to the fixed beam (41). The buoyancy tanks (42) are of a hollow structure; it also includes an air leakage prevention mechanism. The air leakage prevention mechanism is arranged at the lower part of a number of the buoyancy tanks (42). The air leakage prevention mechanism is used to prevent the air filled in the buoyancy tanks (42) from escaping. The air leakage prevention mechanism includes a number of connecting pipes (61). The number of connecting pipes (61) are respectively fixedly connected to the lower parts of the number of buoyancy tanks (42). The lower parts of the number of connecting pipes (61) are all fixedly connected to a downward pull hose (62). The inside of the downward pull hose (62) is communicated with the inside of the connecting pipe (61) and the inside of the buoyancy tank (42). A rotating ring (63) is rotatably connected to the lower part of each downward pull hose (62). A swinging rod (64) is rotatably connected to both sides of each rotating ring (63). A lead weight (65) is fixedly connected to the lower end of each swinging rod (64). A ball valve (66) is rotatably connected to each connecting pipe (61). Gravity rods (67) are rotatably connected to both sides of each ball valve (66). A blocking net (68) is fixedly connected to the lower end of each downward pull hose (62); initially, when the connecting pipe (61) is perpendicular to the ground, the ball valve (66) is in a conducting state. When the wearer is underwater, due to gravity, the nozzle of the downward pull hose (62) faces downward. When the wearer moves in the water, the arc-shaped panel (1) and the buoyancy tanks (42) will tilt together with the tilt of the wearer's body. Then the tilt of the buoyancy tanks (42) will drive the connecting pipes (61) to tilt together. When the connecting pipes (61) tilt, under the influence of gravity, the lead weight (65) will keep the nozzle of the lower part of the downward pull hose (62) facing downward all the time, and the gravity rod (67) will drive the ball valve (66) to rotate. When the wearer's body tilts at a certain angle and the connecting pipes (61) tilt at a certain angle together, the ball valve (66) rotates at a certain angle, making the ball valve (66) in a closed state, and the buoyancy tanks (42) are no longer communicated with the downward pull hoses (62).

2. The underwater life-saving device for fire rescue according to claim 1, characterized in that, Two sector holes are opened in the upper part of the buoyancy tank (42). A number of anti-slip strips (43) are fixedly connected to the inner side walls of the first flexible belt (21) and the second flexible belt (22) close to the arc-shaped panel (1). A number of soft pads (44) are fixedly connected to the side of the arc-shaped panel (1) away from the fixed beam (41).

3. The underwater rescue device for fire fighting and rescue according to claim 2, characterized in that, The water supply and drainage mechanism includes a floating disc (51). A two-way air pump (52) is fixedly connected to the floating disc (51). A connecting pipe rack (53) is fixedly connected between the upper parts of a number of the buoyancy tanks (42). The inside of the connecting pipe rack (53) is communicated with the inside of a number of the buoyancy tanks (42). A connecting long pipe (54) is connected between the lower part of the two-way air pump (52) and the connecting pipe rack (53). A switch button (55) is fixedly connected to the side of the arc-shaped panel (1) close to the fixed beam (41). The switch button (55) is used to control the working state of the two-way air pump (52).

4. A underwater life-saving device for fire rescue according to claim 3, characterized in that, It further includes a quick diving mechanism. The quick diving mechanism is arranged on the fixed beam (41). The quick diving mechanism is used to open the buoyancy tank (42) so that the buoyancy tank (42) can quickly fill with water and sink. The quick diving mechanism includes a number of rotating discs (71). Three of the rotating discs (71) form a group. A number of the rotating discs (71) are respectively rotatably connected to the upper parts of a number of the buoyancy tanks (42). Grooves are opened on the side surfaces of the rotating discs (71). A torsion spring (72) is connected between the rotating discs (71) and the buoyancy tanks (42). A number of opening pieces (73) are fixedly connected to the upper parts of the rotating discs (71). Two communicating holes are opened on the opening pieces (73). Three of the opening pieces (73) form a group. The opening pieces (73) are in contact with the upper surfaces of the buoyancy tanks (42). Two guiding columns (74) are fixedly connected to the fixed beam (41). Three guiding grooves are arranged on the guiding columns (74). Two multi-pipe guiding frames (75) are fixedly connected to one side of the fixed beam (41). Three through holes are opened on the multi-pipe guiding frames (75). A connecting rope (76) is connected to each group of three rotating discs (71). And a part of the connecting rope (76) is wound in the grooves on the side surfaces of the rotating discs (71). The three connecting ropes (76) connected to the three rotating discs (71) in the same group all bypass one of the guiding columns (74). And the three connecting ropes (76) are respectively located in the guiding grooves on the guiding columns (74). The three connecting ropes (76) connected to the three rotating discs (71) in the same group all pass through one of the multi-pipe guiding frames (75). And the three connecting ropes (76) respectively pass through the through holes on the multi-pipe guiding frames (75). A pull ring (77) is fixedly connected between the three connecting ropes (76) connected to the three rotating discs (71) in the same group. The pull ring (77) is in contact with one side of the multi-pipe guiding frame (75).

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