A water level monitoring device with an alarm function

Abstract

The present invention discloses a water level monitoring device with an alarm function, which relates to the technical field of water level monitoring devices. When in use, when the water level rises, the first airbag float and the second airbag float drive the lifting slide rod and the mounting plate to move upward based on buoyancy; at this time, the deformation airbag is compressed, and the exhaust speed of the deformation airbag is restricted by the adjustable air outlet structure. When the water level rises rapidly, the gas cannot be discharged in time, and the deformation speed of the deformation airbag is less than the rising speed of the water level. At this time, there is a difference in the upward movement speed of the mounting plate and the lifting slide rod. The detection part and the convex block cooperate to detect this difference; it is convenient to judge the rising situation of the water level; since a plurality of vertically distributed mounting airbags are installed on the connecting rod, the more mounting airbags are submerged as the water level rises, and the corresponding buoyancy also increases accordingly. If the convex block can still move upward in the detection channel, it indicates that the water level rises rapidly. When the set convex block reaches the set detection part, the alarm mechanism performs an alarm process.

Description

Technical Field

[0001] The present invention relates to the technical field of water level monitoring devices, and in particular to a water level monitoring device with an alarm function. Background Art

[0002] Most of the existing water level monitoring devices can only detect the basic water level and lack effective analysis and processing capabilities for the change speed of the water level. Or it is necessary to rely on a complex detection system to achieve analysis and early warning; in practical applications, the change speed of the water level is one of the important indicators for evaluating the safety status of water areas. For example, during floods, a rapid rise in the water level may indicate a greater risk. Therefore, a device for monitoring the change speed of the water level is needed to take corresponding measures in a timely manner.

[0003] After retrieval, the application solution with the Chinese patent application number CN202223226396.0 discloses a water level monitoring device, including a water level monitoring device body. A bottom plate is provided at the bottom of the water level monitoring device body. Fixed slots are opened at the four corners of the top end of the bottom plate. Fixed components are provided inside the four fixed slots. An anti-blocking component is provided between the fixed components and the water level monitoring device body. The water level monitoring device in the above literature has the following deficiencies: it cannot well determine or collect the change speed information of the water level and still needs to be improved. Summary of the Invention

[0004] The purpose of the present invention is to solve the deficiencies existing in the prior art and propose a water level monitoring device with an alarm function.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A water level monitoring device with an alarm function includes: a monitoring mechanism, an analysis mechanism, and an alarm mechanism. The monitoring mechanism is used to monitor the water level situation. The analysis mechanism analyzes based on the signal fed back by the monitoring mechanism. The alarm mechanism implements an alarm plan according to the analysis result;

[0007] The monitoring mechanism includes:

[0008] A mounting frame, on which a central rod is installed, and a top plate is installed at the top of the central rod;

[0009] A mounting plate, which is slidably connected to the outer wall of the central rod up and down;

[0010] A float mounting disk, a connecting rod is fixed to the bottom of the mounting plate, and the float mounting disk is installed on the outer wall of the bottom of the connecting rod; a mounting buckle is installed at the bottom of the float mounting disk, and a second airbag float is detachably installed on the mounting buckle;

[0011] Lifting slide rod, the lifting slide rod is slidably connected to the inner wall of the top plate up and down. A limiting block is arranged on the lifting slide rod, and the limiting block is located above the top plate; a first airbag float is installed at the bottom of the lifting slide rod, and a convex block is arranged on the lifting slide rod;

[0012] Detection channel, the detection channel is installed on one side of the mounting plate. Detection components are arranged vertically and linearly in the detection channel, and the movement path of the convex block is adapted to each detection component;

[0013] Mounting rod, the mounting rod is installed on the mounting plate, and the mounting rod is slidably connected to the inner wall of the top plate;

[0014] Deformation airbag, the top and bottom of the deformation airbag are respectively installed between the top plate and the mounting plate through mounting parts; An annular wrinkle conducive to deformation is arranged on the deformation airbag. An air inlet pipe is arranged on one side of the top of the deformation airbag, a one-way intake valve is arranged on the air inlet pipe, and an adjustable air outlet structure is arranged on one side of the top of the deformation airbag.

[0015] As a preferred embodiment of the present invention: An installation airbag is detachably installed on the connecting rod. A plurality of limiting pieces are arranged on the connecting rod, and the distance between adjacent limiting pieces is adapted to the size of the installation airbag. The installation airbag is a C-shaped structure.

[0016] As a preferred embodiment of the present invention: An arc-shaped frame is installed on the top of the mounting plate and the bottom of the top plate; The deformation airbag is in a C-shaped structure. Second arc-shaped chucks are arranged at the upper and lower ends of the deformation airbag. First arc-shaped chucks are arranged on the arc-shaped frame. The second arc-shaped chucks and the first arc-shaped chucks of the deformation airbag are connected by clamping parts.

[0017] As a preferred embodiment of the present invention: The clamping part includes:

[0018] Arc-shaped elastic clamping plates, the arc-shaped elastic clamping plates are arranged in pairs. A second side bracket is arranged on one side of one arc-shaped elastic clamping plate, and a first side bracket is arranged on one side of the other arc-shaped elastic clamping plate;

[0019] Connecting column, the connecting column is installed on the first side bracket and is adjustably arranged in the second side bracket;

[0020] Arc-shaped clamping blocks, the arc-shaped clamping blocks are evenly installed on the inner side of the arc-shaped elastic clamping plates in a circumferential distribution. The arc-shaped clamping blocks are adapted to the second arc-shaped chucks and the first arc-shaped chucks.

[0021] As a preferred embodiment of the present invention: The connecting column slides up and down on the inner wall of the second side bracket, and a first fixing knob for fixing the connecting column is connected by thread on one inner wall of the second side bracket.

[0022] As a preferred embodiment of the present invention: A scale line is arranged on one side of the connecting column.

[0023] As a preferred embodiment of the present invention: The adjustable air outlet structure includes:

[0024] A sliding tube, which is slidably mounted on the first side bracket on the basis of being rotatable;

[0025] A connecting tube, which is arranged on one side of the deformable airbag. One end of the connecting tube is connected with a screw cylinder, and the sliding tube is threadedly connected to the inner wall of the screw cylinder;

[0026] An air vent column, which is fixed at one end of the sliding tube. A plurality of linearly distributed air holes are opened on the air vent column. One end of the air vent column is sealed. The size of the air vent column is adapted to the connecting tube. Based on the screwing of the sliding tube, one end of the air vent column extends into the deformable airbag, so that the deformable airbag is communicated with the outside through the corresponding air holes via the sliding tube.

[0027] As a preferred embodiment of the present invention: A sealing ring is fixed on the inner wall of the connecting tube, and the air vent column is hermetically and movably arranged inside the sealing ring.

[0028] As a preferred embodiment of the present invention: A dial is installed on the side surface of the sliding tube.

[0029] As a preferred embodiment of the present invention: Uniformly distributed pin holes are opened on the central rod. A fixing pin is slidably connected to the inner wall of the mounting frame. One end of the fixing pin is connected to the mounting frame through a spring. A pull ring is fixed at one end of the fixing pin, and the fixing pin is adapted to the pin holes.

[0030] The beneficial effects of the present invention are as follows:

[0031] 1. When the present invention is in use, when the water level rises, the first airbag float and the second airbag float drive the lifting sliding rod and the mounting plate to move upward based on buoyancy; at this time, the deformable airbag is compressed, and the exhaust speed of the deformable airbag is limited by the adjustable air outlet structure. When the water level rises slowly, the deformation speed of the deformable airbag meets the rising speed of the mounting plate, and the lifting sliding rod and the detection channel rise synchronously; when the water level rises rapidly, since the gas cannot be discharged in time, the deformation speed of the deformable airbag is less than the rising speed of the water level. At this time, there is a difference in the upward movement speed of the mounting plate and the lifting sliding rod, and the detection piece and the convex block cooperate to detect this difference; so as to facilitate the judgment of the rising situation of the water level.

[0032] 2. Since a plurality of vertically distributed mounting airbags are installed on the connecting rod in the present invention, when the water level rises, the more the submerged mounting airbags are, the greater the corresponding buoyancy is. If the convex block can still move upward in the detection channel, it indicates that the water level rises rapidly. When the set convex block reaches the set detection piece, the alarm mechanism performs an alarm process.

[0033] 3. Since the mounting airbag is detachable in the present invention, and the air outlet speed of the deformable airbag can be adjusted based on the adjustable air outlet structure, the detection flexibility is large, which is convenient for adapting to various schemes.

[0034] 4. By providing the arc-shaped elastic clamping plate and the arc-shaped clamping block, the present invention can, based on the deformation cooperation of the arc-shaped elastic clamping plate, snap the arc-shaped clamping block into the inner sides of the second arc-shaped clamping groove and the first arc-shaped clamping groove, thereby achieving the fixation of the structure.

[0035] 5. By providing structures such as the first fixing knob, the present invention facilitates the adjustment of the position of the connecting column on the second side bracket and fixes it through the first fixing knob, thereby achieving the adjustment of the initial distance between the two arc-shaped elastic clamping plates.

[0036] 6. By providing structures such as the adjustable air outlet structure, the present invention can, according to actual needs, screw the sliding tube to adjust the number of air holes located in the deformation airbag, thereby achieving the adjustment of the exhaust speed and enhancing the practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 is a schematic structural diagram of a water level monitoring device with an alarm function proposed by the present invention;

[0038] Figure 2 is a schematic structural diagram of the mounting bracket of a water level monitoring device with an alarm function proposed by the present invention;

[0039] Figure 3 is a schematic structural diagram of the second airbag float and the mounting bag of a water level monitoring device with an alarm function proposed by the present invention;

[0040] Figure 4 is a schematic structural diagram of the deformation airbag of a water level monitoring device with an alarm function mounted on the arc-shaped elastic clamping plate;

[0041] Figure 5 is a schematic structural diagram of the separation of the deformation airbag and the arc-shaped clamping block of a water level monitoring device with an alarm function;

[0042] Figure 6 is a schematic cross-sectional view of the separation of the ventilation column and the connecting pipe of a water level monitoring device with an alarm function proposed by the present invention;

[0043] Figure 7 of the present invention Figure 1 is an enlarged view of part A.

[0044] In the figure: 1 center rod, 2 mounting frame, 3 mounting bag, 4 mounting plate, 5 arc frame, 6 deformation air bag, 7 mounting rod, 8 top plate, 9 limit block, 10 lifting slide bar, 11 detection member, 12 protrusion, 13 detection channel, 14 connecting rod, 15 first air bag float, 16 fixing pin, 17 pin hole, 18 spring, 19 pull ring, 20 limit piece, 21 mounting buckle, 22 second air bag float, 23 float mounting plate, 24 connecting column, 25 air intake pipe, 26 one-way air intake valve, 27 first fixing knob, 28 second side bracket, 29 first arc-shaped card slot, 30 screw barrel, 31 connecting pipe, 32 slide pipe, 33 air hole, 34 scale line, 35 arc-shaped card block, 36 second arc-shaped card slot, 37 sealing ring, 38 ventilation column, 39 paddle, 40 first side bracket, 41 arc-shaped elastic card plate. DETAILED DESCRIPTION

[0045] The technical solution of the present invention is further described in detail below in conjunction with specific implementation methods.

[0046] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0047] Embodiment 1: A water level monitoring device with an alarm function, such as Figures 1-7 As shown, it includes: a monitoring mechanism, an analysis mechanism and an alarm mechanism, wherein the monitoring mechanism is used to monitor the water level, the analysis mechanism performs analysis based on the signal fed back by the monitoring mechanism, and the alarm mechanism implements an alarm plan according to the analysis result;

[0048] The monitoring agencies include:

[0049] A mounting frame 2, on which a center rod 1 is mounted, and a top plate 8 is mounted on the top of the center rod 1;

[0050] A mounting plate 4, the mounting plate 4 is slidably connected to the outer wall of the center rod 1 up and down;

[0051] The float mounting plate 23 is fixed with a connecting rod 14 at the bottom of the mounting plate 4, and the float mounting plate 23 is mounted on the outer wall of the bottom of the connecting rod 14; a mounting buckle 21 is mounted at the bottom of the float mounting plate 23, and a second airbag float 22 is detachably mounted on the mounting buckle 21;

[0052] A lifting slide bar 10 is connected to the inner wall of the top plate 8 by sliding up and down. A limit block 9 is arranged on the lifting slide bar 10. The limit block 9 is located above the top plate 8. A first air bag float 15 is installed at the bottom of the lifting slide bar 10. A convex block 12 is arranged on the lifting slide bar 10.

[0053] Detection channel 13 is installed on one side of the mounting plate 4. Inside the detection channel 13, there are detection components 11 distributed linearly in the vertical direction. The movement path of the convex block 12 is adapted to each detection component 11.

[0054] Mounting rod 7 is installed on the mounting plate 4, and the mounting rod 7 is slidably connected to the inner wall of the top plate 8.

[0055] Deformable airbag 6 is installed between the top plate 8 and the mounting plate 4 through mounting components at the top and bottom respectively. The deformable airbag 6 is provided with annular wrinkles conducive to deformation. One side of the top of the deformable airbag 6 is provided with an air inlet pipe 25, and a one-way air inlet valve 26 is arranged on the air inlet pipe 25. One side of the top of the deformable airbag 6 is provided with an adjustable air outlet structure.

[0056] Mounting bladder 3 is detachably installed on the connecting rod 14. A plurality of limiting pieces 20 are arranged on the connecting rod 14, and the distance between adjacent limiting pieces 20 is adapted to the size of the mounting bladder 3. The mounting bladder 3 is of a C-shaped structure.

[0057] Among them, the detection component 11 can adopt a contact switch. By contacting the convex block 12, the detection component 11 at the corresponding height is triggered, and the water level information is fed back in the form of an electrical signal. It can also adopt a photoelectric induction switch to sense the convex block 12 through photoelectric induction switches at different positions to collect the water level information, or other sensors, etc.

[0058] During use, when the water level rises, the first airbag float 15 and the second airbag float 22 drive the lifting slide rod 10 and the mounting plate 4 to move upward based on buoyancy. At this time, the deformable airbag 6 is compressed, and the exhaust speed of the deformable airbag 6 is limited by the adjustable air outlet structure. When the water level rises slowly, the deformation speed of the deformable airbag 6 meets the rising speed of the mounting plate 4, and the lifting slide rod 10 and the detection channel 13 rise synchronously. When the water level rises rapidly, since the gas cannot be discharged in time, the deformation speed of the deformable airbag 6 is less than the rising speed of the water level. At this time, there is a difference in the upward movement speed of the mounting plate 4 and the lifting slide rod 10. The detection component 11 and the convex block 12 cooperate to detect this difference, so as to facilitate judging the situation of the rising water level.

[0059] In addition, since a plurality of vertically distributed mounting bladders 3 are installed on the connecting rod 14, when the water level rises, the more the submerged mounting bladders 3, the greater the corresponding buoyancy. If the convex block 12 can still move upward in the detection channel 13, it indicates that the water level rises rapidly. When the set convex block 12 reaches the set detection component 11, the alarm mechanism gives an alarm.

[0060] Since the mounting bladder 3 is detachable and the air outlet speed of the deformable airbag 6 can be adjusted based on the adjustable air outlet structure, the detection flexibility is large, which is convenient for adapting to various schemes.

[0061] For facilitating the disassembly and assembly of the deformable airbag 6; as Figure 4 、 Figure 5 、 Figure 6 shown, an arc-shaped frame 5 is installed at the top of the mounting plate 4 and the bottom of the top plate 8; the deformable airbag 6 has a C-shaped structure, second arc-shaped card slots 36 are arranged at the upper and lower ends of the deformable airbag 6, first arc-shaped card slots 29 are formed on the arc-shaped frame 5, and the second arc-shaped card slots 36 and the first arc-shaped card slots 29 of the deformable airbag 6 are connected by a clamping member in a clamping manner.

[0062] For improving the reliability of clamping; as Figure 5 shown, the clamping member includes:

[0063] Arc-shaped elastic clamping plates 41, the arc-shaped elastic clamping plates 41 are arranged in pairs, a second side bracket 28 is arranged on one side of one arc-shaped elastic clamping plate 41, and a first side bracket 40 is arranged on one side of the other arc-shaped elastic clamping plate 41;

[0064] Connecting column 24, the connecting column 24 is installed on the first side bracket 40, and the connecting column 24 is adjustably arranged in the second side bracket 28;

[0065] Arc-shaped clamping blocks 35, the arc-shaped clamping blocks 35 are evenly installed on the inner side of the arc-shaped elastic clamping plates 41 in a circumferential distribution, and the arc-shaped clamping blocks 35 are adapted to the second arc-shaped card slots 36 and the first arc-shaped card slots 29;

[0066] By arranging the arc-shaped elastic clamping plates 41 and the arc-shaped clamping blocks 35, the arc-shaped clamping blocks 35 can be clamped into the inner sides of the second arc-shaped card slots 36 and the first arc-shaped card slots 29 based on the deformation cooperation of the arc-shaped elastic clamping plates 41 to realize the fixation of the structure.

[0067] For facilitating the adjustment of the initial distance between the two arc-shaped elastic clamping plates 41; as Figure 5 、 Figure 6 shown, the connecting column 24 slides up and down on the inner wall of the second side bracket 28, and a first fixing knob 27 for fixing the connecting column 24 is connected to one inner wall of the second side bracket 28 by a thread;

[0068] By arranging structures such as the first fixing knob 27, it is convenient to adjust the position of the connecting column 24 on the second side bracket 28 and fix it by the first fixing knob 27 to realize the adjustment of the initial distance between the two arc-shaped elastic clamping plates 41.

[0069] For improving the practicability; as Figure 6 shown, a scale line 34 is arranged on one side of the connecting column 24.

[0070] For facilitating the adjustment of the exhaust speed; as Figure 5 、 Figure 6 shown, the adjustable air outlet structure includes:

[0071] The sliding tube 32 is slidably mounted on the first side bracket 40 on the basis of being rotatable;

[0072] The connecting tube 31 is arranged on one side of the deformable airbag 6. One end of the connecting tube 31 is connected with a screw cylinder 30, and the sliding tube 32 is threadedly connected to the inner wall of the screw cylinder 30;

[0073] The ventilation column 38 is fixed to one end of the sliding tube 32. A plurality of linearly distributed air holes 33 are formed in the ventilation column 38. One end of the ventilation column 38 is sealed. The size of the ventilation column 38 is adapted to the connecting tube 31. Based on the screwing of the sliding tube 32, one end of the ventilation column 38 extends into the deformable airbag 6, so that the deformable airbag 6 is communicated with the outside through the corresponding air holes 33 through the sliding tube 32.

[0074] To improve reliability; as Figure 6 shown, a sealing ring 37 is fixed to the inner wall of the connecting tube 31, and the ventilation column 38 is hermetically movable inside the sealing ring 37.

[0075] To facilitate operation; as Figure 6 shown, a dial 39 is installed on the side surface of the sliding tube 32;

[0076] By providing structures such as an adjustable air outlet structure, the sliding tube 32 can be screwed according to actual needs to adjust the number of the air holes 33 located inside the deformable airbag 6, so as to realize the adjustment of the exhaust speed and improve the practicability.

[0077] To facilitate the adjustment of the position of the center rod 1; as Figure 2 shown, uniformly distributed pin holes 17 are formed in the center rod 1. A fixing pin 16 is slidably connected to the inner wall of the mounting frame 2. One end of the fixing pin 16 is connected to the mounting frame 2 through a spring 18. A pull ring 19 is fixed to one end of the fixing pin 16, and the fixing pin 16 is adapted to the pin holes 17;

[0078] By providing structures such as the fixing pin 16 and the pin holes 17, the fixing pin 16 can be installed in the pin holes 17 of different center rods 1, so as to adjust the position of the center rod 1 and improve the practicability.

[0079] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its inventive concept, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A water level monitoring device with an alarm function, characterized in that: include: A monitoring mechanism, an analysis mechanism and an alarm mechanism, wherein the monitoring mechanism is used to monitor the water level, the analysis mechanism performs analysis based on the signal fed back by the monitoring mechanism, and the alarm mechanism implements an alarm plan according to the analysis result; The monitoring agencies include: A mounting frame (2), a center rod (1) being mounted on the mounting frame (2), and a top plate (8) being mounted on the top of the center rod (1); A mounting plate (4), the mounting plate (4) being slidably connected to the outer wall of the center rod (1) in an up-and-down manner; A float mounting plate (23), a connecting rod (14) is fixed to the bottom of the mounting plate (4), and the float mounting plate (23) is mounted on the outer wall of the bottom of the connecting rod (14); a mounting buckle (21) is mounted on the bottom of the float mounting plate (23), and a second airbag float (22) is detachably mounted on the mounting buckle (21); A lifting slide bar (10), the lifting slide bar (10) is slidably connected to the inner wall of the top plate (8) up and down, a limit block (9) is provided on the lifting slide bar (10), and the limit block (9) is located above the top plate (8); a first air bag float (15) is installed at the bottom of the lifting slide bar (10), and a protrusion (12) is provided on the lifting slide bar (10); A detection channel (13), the detection channel (13) being mounted on one side of the mounting plate (4), the detection channel (13) being provided with detection elements (11) distributed vertically and linearly, and the movement path of the protrusion (12) being adapted to each detection element (11); A mounting rod (7), the mounting rod (7) being mounted on the mounting plate (4), the mounting rod (7) being slidably connected to the inner wall of the top plate (8); A deformable airbag (6), wherein the top and bottom of the deformable airbag (6) are respectively mounted between a top plate (8) and a mounting plate (4) via mounting parts; an annular fold that facilitates deformation is provided on the deformable airbag (6); an air inlet pipe (25) is provided on one side of the top of the deformable airbag (6); a one-way air inlet valve (26) is provided on the air inlet pipe (25); and an adjustable air outlet structure is provided on one side of the top of the deformable airbag (6).

2. A water level monitoring device with an alarm function according to claim 1, characterized in that: The connecting rod (14) is detachably mounted with a mounting capsule (3), a plurality of limiting plates (20) are provided on the connecting rod (14), the spacing between adjacent limiting plates (20) is adapted to the size of the mounting capsule (3), and the mounting capsule (3) is a C-shaped structure.

3. A water level monitoring device with alarm function according to claim 2, characterized in that: An arc frame (5) is installed on the top of the mounting plate (4) and the bottom of the top plate (8); the deformable airbag (6) is in a C-shaped structure, and second arc-shaped slots (36) are provided at the upper and lower ends of the deformable airbag (6); a first arc-shaped slot (29) is provided on the arc frame (5); and the second arc-shaped slot (36) and the first arc-shaped slot (29) of the deformable airbag (6) are connected by a clamping member.

4. A water level monitoring device with alarm function according to claim 3, characterized in that: The card connector comprises: Arc-shaped elastic clamping plates (41), the arc-shaped elastic clamping plates (41) being arranged in pairs, one side of one arc-shaped elastic clamping plate (41) being provided with a second side bracket (28), and one side of the other arc-shaped elastic clamping plate (41) being provided with a first side bracket (40); A connecting column (24), the connecting column (24) being mounted on the first side bracket (40), and the connecting column (24) being adjustably disposed in the second side bracket (28); The arc-shaped clamping blocks (35) are evenly installed on the inner side of the arc-shaped elastic clamping plate (41) in a circumferentially distributed manner, and the arc-shaped clamping blocks (35) are matched with the second arc-shaped clamping groove (36) and the first arc-shaped clamping groove (29).

5. A water level monitoring device with alarm function according to claim 4, characterized in that: The connecting column (24) slides up and down on the inner wall of the second side bracket (28), and a first fixing knob (27) for fixing the connecting column (24) is threadedly connected to the inner wall of one side of the second side bracket (28).

6. A water level monitoring device with alarm function according to claim 5, characterized in that: A scale mark (34) is provided on one side of the connecting column (24).

7. A water level monitoring device with alarm function according to claim 4, characterized in that: The adjustable air outlet structure comprises: A sliding tube (32), the sliding tube (32) being slidably mounted on the first side bracket (40) on a rotatable basis; A connecting tube (31), the connecting tube (31) being arranged on one side of the deformable airbag (6), one end of the connecting tube (31) being connected to a screw barrel (30), and the sliding tube (32) being connected to the inner wall of the screw barrel (30) via a thread; A ventilation column (38) is fixed to one end of the sliding tube (32). A plurality of linearly distributed air holes (33) are provided on the ventilation column (38). One end of the ventilation column (38) is sealed. The size of the ventilation column (38) is adapted to the connecting tube (31). Based on the screwing of the sliding tube (32), one end of the ventilation column (38) penetrates into the deformable air bag (6), so that the deformable air bag (6) is connected to the outside through the corresponding air holes (33) and the sliding tube (32).

8. A water level monitoring device with alarm function according to claim 7, characterized in that: A sealing ring (37) is fixed to the inner wall of the connecting pipe (31), and the venting column (38) is sealingly movable inside the sealing ring (37).

9. A water level monitoring device with alarm function according to claim 8, characterized in that: A paddle (39) is mounted on the side of the slide tube (32).

10. A water level monitoring device with alarm function according to claim 9, characterized in that: The central rod (1) is provided with evenly distributed pin holes (17), the inner wall of the mounting frame (2) is slidably connected with a fixing pin (16), one end of the fixing pin (16) and the mounting frame (2) are connected via a spring (18), a pull ring (19) is fixed to one end of the fixing pin (16), and the fixing pin (16) is adapted to the pin hole (17).

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