Underwater earthquake detection device and method of use thereof

Abstract

The present invention belongs to the technical field of earthquake detection, specifically an underwater earthquake detection device and a method for using the same, comprising a gas collecting hood, which is installed on the water surface and is used to collect escaping gas, and the gas collecting hood is externally connected to a digital observation device through a pipeline; and further comprising an overflow degassing component, which is installed on the gas collecting hood and is used to improve degassing efficiency; the present invention promotes a relatively fixed escape position of slightly soluble gas by performing bubbling degassing inside a separation tube, and guides the bubbles by using the separation tube, so that the airflow eventually converges in the gas collecting hood, and simultaneously promotes the circulation of well water inside the separation tube during the gas collection process, not only allowing the floating bubbles to enter the separation tube under the entrainment of the water flow, but also promoting the further escape of slightly soluble gas in the well water by bubbling, thereby effectively enhancing the detection effect of radon elements in the well water, and providing effective data support for earthquake detection.

Description

Technical Field

[0001] The present invention belongs to the technical field of earthquake detection, in particular to an underwater earthquake detection device and a method for using the same. Background Art

[0002] Earthquake is a natural phenomenon on the surface of the earth. Due to its great destructive power, in order to reduce the destructive power caused by earthquakes, it is necessary to predict earthquakes. In earthquake detection technology, earthquake precursors are one of the important bases for predicting earthquakes.

[0003] In the collection and judgment of relevant earthquake precursors, degassing and collecting groundwater to determine the changes in gas composition in groundwater is one of the methods of earthquake detection. When degassing and collecting groundwater, degassing and gas collection devices are usually set up in deep wells, hot springs and other areas connected to the underground, and different types of degassing and gas collection devices are selected according to the fluidity and temperature of the water. When collecting gas in a still water well, a funnel-shaped structure is usually used and built into the still water well to collect the gas emitted by itself in the still water well. However, since the still water level often changes, the gas collection device fixed in the well cannot keep up with the liquid level rise and fall in time, which leads to changes in the volume of the gas collection chamber, resulting in a large negative impact on the gas collection effect.

[0004] Related technology discloses a floating gas collection and degassing device for earthquake monitoring, with application number CN2019208624196. This solution floats the device on the water surface, which is not affected by liquid level changes, and has no requirements for head height and water flow rate. There is no problem of water channels being blocked due to poor water quality or impurities. It can be used in well pipes, springs, pools, water tanks, puddles and other places. It has a wide range of applications and good gas collection and degassing effects. However, in actual application, it was found that due to the floating characteristics of the device, the device cannot seal the liquid surface, and some bubbles are not covered by the device during the floating process, which leads to some escaping gases not being collected, thereby reducing the detection concentration and increasing the difficulty of the detection process.

[0005] In view of this, the present invention proposes an underwater earthquake detection device and a method of using the same to solve the above technical problems. Summary of the Invention

[0006] In order to make up for the deficiencies of the prior art and solve the above-mentioned technical problems, the present invention proposes an underwater earthquake detection device and a method for using the same.

[0007] The technical solution adopted by the present invention to solve the technical problem is as follows: an underwater earthquake detection device according to the present invention comprises a gas collecting hood, which is installed on the water surface and is used to collect escaping gas. The gas collecting hood is connected to an external digital observation device through a pipeline;

[0008] It also includes an overflow degassing component, which is installed on the gas collecting hood and is used to improve degassing efficiency;

[0009] The overflow degassing assembly includes a floating ring, a separator tube, a bubbler and an extension tube;

[0010] The floating ring is fixedly installed on the gas collecting cover, and the floating ring is used to enhance the suspension stability of the gas collecting cover in the well water;

[0011] The separator tube is fixedly mounted on the floating ring and extends into the inner cavity of the gas collecting hood. The top of the separator tube is higher than the liquid surface. An overflow trough is formed between the separator tube and the floating ring. The bottom of the separator tube is designed in an inverted funnel shape.

[0012] The bubbler is installed on the gas collecting hood and is used to extract air and pump it into the extension tube. The extension tube extends into the separation tube. The extension tube is evenly opened at the bottom of the separation tube.

[0013] Preferably, it further comprises a forced circulation component, wherein the forced circulation component is installed on the separation pipe and is used to enhance the flow effect of the well water;

[0014] The forced circulation assembly includes a roller, a through hole and a gravity plug;

[0015] A symmetrically designed rotating groove is provided at the top of the separation tube, and a roller is rotatably installed in the rotating groove. The roller is a disc-shaped structure, and the roller has water storage cavities evenly distributed along the circumference.

[0016] The drum is provided with through holes in the circumferential direction, the through holes correspond to the water storage chambers one by one, the through holes are located on one side of the water storage chamber, and gravity plugs are installed in the through holes.

[0017] Preferably, the forced circulation component further includes an air guide hood;

[0018] An air guide cover is fixedly installed on the top of the separation tube. The air guide cover is conical in design and has an opening at the top. The rotating groove passes through the air guide cover.

[0019] The rollers are provided with evenly distributed air grooves, and the gap between the two rollers is vertically aligned with the opening of the air guide cover.

[0020] Preferably, the drum is rotatably mounted with evenly distributed sealing rollers, and the drum is connected to the inner wall of the air guide cover in a rolling and sealing manner via the sealing rollers;

[0021] A sealing strip is fixedly installed at the position where the air guide cover is penetrated by the rotating groove, and the sealing strip is used to seal the gap between the drum and the air guide cover.

[0022] Preferably, a symmetrically designed guide plate is fixedly installed in the separation tube, and the two guide plates are designed in an eight-shaped shape. The guide plates are used to guide the bubbles to flow into the gap between the rollers.

[0023] Preferably, an elastic membrane is fixedly installed in the water storage chamber, a counterweight is fixedly installed in the middle of the elastic membrane, and the counterweight cooperates with the elastic membrane to adjust the pressure of the water storage chamber.

[0024] Preferably, the water storage chamber is designed to be axisymmetric on the drum, and the two symmetrical water storage chambers are close to each other at one end and are connected by a ventilation pipe.

[0025] Preferably, the gravity plug is designed in an I-shape, and the gravity plug extends into the water storage chamber. An air outlet slot is provided on the gravity plug, and a rubber sleeve is fixedly installed in the water storage chamber. The rubber sleeve is provided on the gravity plug, and the rubber sleeve blocks the air outlet slot. When the gravity plug is located at the top of the drum, the rubber sleeve and the air outlet slot are misaligned.

[0026] Preferably, the gravity plug and the counterweight are elastically connected via an elastic rope.

[0027] A method for using an underwater earthquake detection device, comprising the following steps:

[0028] S1. Assembly: After assembling the seismic detection device outside the well, hoist it into the well to be monitored, and then connect the gas collection hood to the digital observation device using a pipe;

[0029] S2. Bubbling: The staff controls the bubbler through a pre-set program. The bubbler continuously pumps dense bubbles into the separation tube. As the bubbles float upward, the slightly soluble radon gas in the water is released.

[0030] S3, overflow: bubbles rise and converge into airflow, which drives the forced circulation component to start, causing the water in the separation tube to flow into the overflow tank, prompting the water to form a circulation flow in the separation tube;

[0031] S4. Detection: The airflow gathers in the gas collecting hood and flows into the digital observation device along the pipe on the gas collecting hood, and then the radon gas content is monitored for a long time, providing data support for earthquake early warning.

[0032] The beneficial effects of the present invention are as follows:

[0033] 1. The underwater earthquake detection device and the method of using the same described in the present invention, by setting an overflow degassing component, during the degassing and gas collection process, bubbling degassing is performed inside the separation tube, so that the escape position of the slightly soluble gas is relatively fixed, and the separation tube is used to guide the bubbles, so that the airflow is finally gathered in the gas collection hood. At the same time, during the gas collection process, the principle of gas floating and liquid settling is used to promote the circulation of well water inside the separation tube. During the circulation process, not only the floating bubbles enter the separation tube under the influence of the water flow, but also the bubbling is used to promote the further escape of the slightly soluble gas in the well water, thereby effectively enhancing the detection effect of radon element in the well water, and providing effective data support for earthquake detection.

[0034] 2. The underwater seismic detection device and the method of using the device described in the present invention, by providing an elastic membrane and a counterweight block, utilize the change in the volume of the water storage end of the water storage chamber during the rotation of the drum, so that the well water is subjected to negative pressure and positive pressure in turn, thereby enhancing the escape effect of slightly soluble gases in the well water, and coordinating with bubbling degassing, separation tube drainage and collection of airflow by the gas collecting hood, ultimately enhancing the detection effect of radon gas in the well water. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The present invention will be further described below with reference to the accompanying drawings.

[0036] Figure 1 is a perspective view of the present invention;

[0037] Figure 2 It is a partial structural stereogram of the present invention;

[0038] Figure 3 This is a three-dimensional diagram of the assembly of the separator tube and the air guide cover;

[0039] Figure 4 It is a three-dimensional picture of the drum;

[0040] Figure 5 is a cross-sectional view of the drum;

[0041] Figure 6 yes Figure 5 A partial enlarged view of point A in the middle;

[0042] Figure 7 It is an overall cross-sectional view of the present invention;

[0043] Figure 8 is a flow chart of the method of the present invention;

[0044] In the figure: 1. Gas collecting hood; 11. Floating ring; 12. Separator tube; 13. Bubble generator; 14. Extension tube; 2. Overflow trough; 21. Drum; 22. Water storage chamber; 23. Through hole; 24. Gravity plug; 25. Gas guide hood; 26. Rotating trough; 27. Gas trough; 3. Sealing roller; 31. Sealing strip; 32. Drain plate; 4. Elastic membrane; 41. Counterweight; 42. Vent tube; 43. Air outlet slot; 5. Rubber sleeve; 51. Elastic rope. DETAILED DESCRIPTION

[0045] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0046] like Figures 1 to 7 As shown, the underwater earthquake detection device of the present invention includes a gas collecting hood 1, which is installed on the water surface and is used to collect escaping gas. The gas collecting hood 1 is connected to an external digital observation device through a pipeline;

[0047] It also includes an overflow degassing component, which is installed on the gas collecting cover 1 and is used to improve the degassing efficiency;

[0048] The overflow degassing assembly includes a floating ring 11, a separator tube 12, a bubbler 13 and an extension tube 14;

[0049] The floating ring 11 is fixedly mounted on the gas collecting hood 1 and is used to enhance the suspension stability of the gas collecting hood 1 in the well water;

[0050] The separator tube 12 is fixedly mounted on the floating ring 11 and extends into the inner cavity of the gas collecting hood 1. The top of the separator tube 12 is higher than the liquid level. An overflow trough 2 is formed between the separator tube 12 and the floating ring 11. The bottom of the separator tube 12 is designed in an inverted funnel shape.

[0051] The bubbler 13 is installed on the gas collecting hood 1 . The bubbler 13 is used to extract air and pump it into the extension tube 14 . The extension tube 14 extends into the separation tube 12 . The extension tube 14 is evenly opened at the bottom of the separation tube 12 .

[0052] When detecting radon gas escaping from a stilling well, radon gas escapes through the liquid level of the stilling well. Therefore, a conventional funnel-shaped gas collecting device needs to seal the liquid level of the stilling well, which makes it too difficult to raise and lower the gas collecting device, and it cannot rise and fall synchronously with the water level. When the gas collecting device is suspended on the liquid level, the gas collecting device cannot seal the liquid level, so some radon gas escapes into the air, further reducing the collection efficiency of the already low radon gas content. The present invention, by providing an overflow degassing component, can enhance the collection effect of radon gas as much as possible while ensuring that the gas collecting device rises and falls synchronously with the liquid level, thereby enhancing the detection effect of radon gas escaping from the stilling well.

[0053] Specifically, the gas collecting hood 1 for collecting gas in the present invention is fixedly installed on the floating ring 11. The diameter of the floating ring 11 is smaller than the diameter of the still water well. The floating ring 11 is made of low-density material and can be stably suspended in the well water. The floating ring 11 is hollow and can be manually injected with light gas into the floating ring 11 to adjust the position of the floating ring 11 on the liquid surface. At the same time, the device can rise and fall synchronously with the liquid surface. The separator tube 12 fixedly installed on the floating ring 11 is also made of light material. The whole is a cylindrical pipe-type structure. The separator tube 12 extends toward the bottom of the well, and the top of the separator tube 12 is higher than the liquid surface. When the normal gas collection operation is in progress, the staff controls the bubbler 13 to start through a pre-set program, and the bubbler 13 extracts the outside The air is collected and pumped into the extension pipe 14, and the extension pipe 14 extends into the separation pipe 12. The extension pipe 14 is located at the bottom of the separation pipe 12 with uniform openings. Therefore, when the air is ejected through the extension pipe 14, it floats upward in the form of continuous small bubbles. After the bubbles come into contact with the water, the slightly soluble gas in the water is caused to escape, and finally the gas floats into the gas collecting hood 1. Because the bubbles continuously emerge, the water surface in the separation pipe 12 is in a boiling state. Under the impact of the continuous bubbles in the extension pipe 14, the water in the separation pipe 12 has a tendency to move upward. In this state, part of the water flows into the overflow tank 2 to maintain the liquid level in the well water, thereby causing the well water to circulate inside and outside the separation pipe 12, thereby enhancing the collection effect of the escaping gas.

[0054] The present invention sets an overflow degassing component. During the degassing and gas collection process, bubbling degassing is performed inside the separation tube 12, so that the escape position of the slightly soluble gas is relatively fixed, and the separation tube 12 is used to guide the bubbles, so that the airflow finally converges in the gas collection hood 1. At the same time, during the gas collection process, the principle of gas floating and liquid settling is used to promote the circulation of well water inside the separation tube 12. During the circulation process, not only the floating bubbles enter the separation tube 12 under the influence of the water flow, but also the bubbling is used to promote the further escape of the slightly soluble gas in the well water, thereby effectively enhancing the detection effect of radon element in the well water, and providing effective data support for earthquake detection.

[0055] As a preferred embodiment of the present invention, it further comprises a forced circulation component, which is installed on the separation pipe 12 and is used to enhance the flow effect of the well water;

[0056] The forced circulation assembly includes a drum 21, a through hole 23 and a gravity plug 24;

[0057] A symmetrically designed rotating groove 26 is provided at the top of the separation tube 12. A roller 21 is rotatably mounted in the rotating groove 26. The roller 21 is a disc-shaped structure having water storage chambers 22 evenly distributed along the circumference of the roller 21.

[0058] The drum 21 is provided with through holes 23 in the circumferential direction. The through holes 23 correspond to the water storage chambers 22 one by one. The through holes 23 are located on one side of the water storage chamber 22 . A gravity plug 24 is installed in the through hole 23 .

[0059] The forced circulation assembly further includes an air guide cover 25;

[0060] An air guide cover 25 is fixedly mounted on the top of the separation tube 12. The air guide cover 25 is conical in design and has an open top. The rotating groove 26 passes through the air guide cover 25.

[0061] The rollers 21 are provided with evenly distributed air grooves 27 , and the gap between the two rollers 21 is vertically aligned with the opening of the air guide cover 25 .

[0062] The drum 21 is rotatably mounted with evenly distributed sealing rollers 3, and the drum 21 is connected to the inner wall of the air guide cover 25 through the sealing rollers 3 in a rolling and sealing manner;

[0063] A sealing strip 31 is fixedly installed at the position where the air guide cover 25 is penetrated by the rotating groove 26 . The sealing strip 31 is used to block the gap between the drum 21 and the air guide cover 25 .

[0064] A symmetrically designed guide plate 32 is fixedly installed in the separation tube 12 . The two guide plates 32 are designed in an eight-shaped shape. The guide plates 32 are used to guide the bubbles to flow into the gap between the drum 21 .

[0065] In order to further enhance the effect of well water circulation in and outside the separation tube 12, a forced circulation component is provided in the present invention. The bubbler 13 and the extension tube 14 work together to form continuous and dense small bubbles at the bottom of the separation tube 12. The small bubbles continue to float up under the action of buoyancy. As the small bubbles converge into large bubbles, the large bubbles form airflow after leaving the water body. The airflow and bubbles are guided by the guide plate 32 and flow into the opening of the air guide cover 25 through the gap between the two rollers 21, and the opening of the air guide cover 25 flows into the air collecting cover 1. In this process, since the surface of the roller 21 is provided with evenly distributed air grooves 27, during the directional flow of the airflow, based on the driving force of the roller 21, the roller 21 is caused to rotate periodically in the rotating groove 26. When the through hole 23 provided on the roller 21 is below the liquid level, the corresponding gravity plug 24 is located below the center of the roller 21. Under the action of gravity, the gravity plug 24 moves The through hole 23 is moved to open, and water flows into the water storage chamber 22 under the action of pressure. As the drum 21 continues to rotate, since the through hole 23 is located on one side of the drum 21, as the drum 21 continues to rotate, the through hole 23 is initially located at the upper end of the water storage chamber 22. After turning half a circle, the through hole 23 is located at the lower end of the water storage chamber 22. At this time, the water flows out of the water storage chamber 22 and is finally guided by the drum 21 and the sealing strip 31 to flow into the overflow trough 2. As the drum 21 continues to rotate under the impetus of the airflow, the water inside the separation tube 12 is continuously transported to the overflow trough 2, and then in the process of downward sedimentation, it enters the separation tube 12 from the bottom of the separation tube 12, thereby forming a circulation trend of the water flow inside and outside the separation tube 12, thereby forcing the circulation movement of the water flow to proceed, prompting the escaping gas to be collected and gathered, thereby enhancing the detection effect of radon elements in well water.

[0066] As a preferred embodiment of the present invention, an elastic membrane 4 is fixedly installed in the water storage chamber 22 , a counterweight 41 is fixedly installed in the middle of the elastic membrane 4 , and the counterweight 41 cooperates with the elastic membrane 4 to adjust the pressure of the water storage chamber 22 .

[0067] The water storage chamber 22 is designed to be axisymmetric on the drum 21 , and the two symmetrical water storage chambers 22 are close to each other at one end and are connected by a ventilation pipe 42 .

[0068] The gravity plug 24 is designed in an I-shape and extends into the water storage chamber 22. An air outlet groove 43 is provided on the gravity plug 24. A rubber sleeve 5 is fixedly installed in the water storage chamber 22. The rubber sleeve 5 is sleeved on the gravity plug 24 and blocks the air outlet groove 43. When the gravity plug 24 is located at the top of the drum 21, the rubber sleeve 5 and the air outlet groove 43 are misaligned.

[0069] The gravity plug 24 and the counterweight 41 are elastically connected via an elastic rope 51 .

[0070] In order to further enhance the escape effect of slightly soluble radon gas, an elastic membrane 4 is provided in the water storage chamber 22 in the present invention, and a counterweight 41 is fixedly installed on the elastic membrane 4. When the water storage chamber 22 is located at the bottom end of the drum 21, the gravity plug 24 in the corresponding through hole 23 moves downward, and the well water flows into the water storage chamber 22 through the through hole 23. Under the action of gravity, the counterweight 41 in the water storage chamber 22 presses the elastic membrane 4, and the elastic membrane deforms downward, causing the volume of the end of the water storage chamber 22 for accommodating water to be smaller. As the drum 21 continues to rotate, when the water storage chamber 22 moves to When the roller 21 is above the center, the gravity plug 24 blocks the through hole 23, and the counterweight 41 pulls the elastic membrane 4 toward the center of the roller 21, thereby increasing the volume of the water storage end of the water storage chamber 22. As the volume increases, the pressure at the water storage end of the water storage chamber 22 decreases. Under the action of negative pressure, the solubility of gas in the well water decreases, thereby enhancing the gas escape effect. Moreover, due to the downward movement of the gravity plug 24, when the gravity plug 24 corresponding to the water storage chamber 22 moves to the top of the roller 21, the air outlet groove 43 on the gravity plug 24 is misaligned with the rubber sleeve 5, thereby allowing outside air to enter the water storage chamber. 22, as the drum 21 continues to rotate, the gravity plug 24 moves downward from the top of the drum 21. Under the combined action of gravity and air pressure, the gravity plug 24 opens the through hole 23 in advance, prompting the air and water in the water storage chamber 22 to be discharged under the action of gravity. It should be noted that in the present invention, the gravity plug 24 is located at one end outside the drum 21 and is made of elastic material. When the gravity plug 24 corresponding to the water storage chamber 22 is located above the center of the drum 21, the gravity plug 24 blocks the through hole 23. As the height of the gravity plug 24 continues to increase, the end of the gravity plug 24 is compressed, thereby causing the water to be discharged. The gravity plug 24 continues to move into the water storage chamber 22 until it reaches the top of the drum 21. The gravity plug 24 is elastically connected to the counterweight block 41 through an elastic rope 51. The gravity of the counterweight block 41 is used to provide sufficient force for the movement and compression of the gravity plug 24. The water storage chambers 22 are symmetrically arranged and connected by a vent pipe 42. The water-free ends of the water storage chambers 22 at the top and bottom ends of the drum 21 are connected, so that the changes in the volumes of the water-free ends of the two water storage chambers 22 complement each other, thereby reducing the influence of air pressure on the volume changes of the water storage ends of the water storage chambers 22.

[0071] The present invention provides an elastic membrane 4 and a counterweight 41. During the rotation of the drum 21, the volume change of the water storage end of the water storage chamber 22 is utilized to make the well water successively subjected to negative pressure and positive pressure, thereby enhancing the escape effect of slightly soluble gases in the well water. Combined with bubbling degassing, drainage by the separation tube 12 and collection of airflow by the gas collecting hood 1, the detection effect of radon gas in the well water is ultimately enhanced.

[0072] like Figure 8 As shown, a method for using an underwater earthquake detection device includes the following steps:

[0073] S1. Assembly: After assembling the seismic detection device outside the well, hoist it into the well to be monitored, and then connect the gas collection cover 1 to the digital observation device using a pipeline;

[0074] S2, bubbling: The staff controls the bubbler 13 to start according to a pre-set program. The bubbler 13 continuously pumps dense bubbles into the separation tube 12. As the bubbles float upward, the slightly soluble radon gas in the water is released.

[0075] S3, overflow: bubbles rise and converge into airflow, which drives the forced circulation component to start, causing the water in the separation tube 12 to flow into the overflow tank 2, prompting the water to form a circulation flow in the separation tube 12;

[0076] S4. Detection: The airflow converges in the gas collecting hood 1 and flows into the digital observation device along the pipe on the gas collecting hood 1, thereby monitoring the radon gas content for a long time, providing data support for earthquake early warning.

[0077] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the foregoing embodiments. The foregoing embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. An underwater earthquake detection device, comprising a gas collecting hood (1), wherein the gas collecting hood (1) is installed on the water surface, the gas collecting hood (1) is used to collect escaping gas, and the gas collecting hood (1) is externally connected to a digital observation device through a pipeline; Its characteristics are: It also includes an overflow degassing component, which is installed on the gas collecting cover (1) and is used to improve the degassing efficiency; The overflow degassing assembly comprises a floating ring (11), a separation tube (12), a bubbler (13) and an extension tube (14); The floating ring (11) is fixedly mounted on the gas collecting hood (1), and the floating ring (11) is used to enhance the suspension stability of the gas collecting hood (1) in the well water; The separation tube (12) is fixedly mounted on the floating ring (11), the separation tube (12) extends into the inner cavity of the gas collecting hood (1), the top of the separation tube (12) is higher than the liquid surface, an overflow trough (2) is formed between the separation tube (12) and the floating ring (11), and the bottom of the separation tube (12) is designed in an inverted funnel shape; The bubbler (13) is mounted on the gas collecting hood (1), and is used to extract air and pump it into the extension tube (14). The extension tube (14) extends into the separation tube (12), and the extension tube (14) is evenly opened at the bottom of the separation tube (12); It also includes a forced circulation component, which is installed on the separation pipe (12) and is used to enhance the flow effect of well water; The forced circulation assembly includes a roller (21), a through hole (23) and a gravity plug (24); A symmetrically designed rotating groove (26) is provided at the top of the separation tube (12), a roller (21) is rotatably mounted in the rotating groove (26), the roller (21) being a disc-shaped structure, and the roller (21) is provided with evenly distributed water storage cavities (22) along the circumferential direction; The drum (21) is provided with through holes (23) in the circumferential direction. The through holes (23) correspond to the water storage chambers (22) one by one. The through holes (23) are located on one side of the water storage chamber (22). A gravity plug (24) is installed in the through hole (23). The forced circulation assembly further includes an air guide hood (25); An air guide cover (25) is fixedly mounted on the top of the separation tube (12); the air guide cover (25) is conical in design, the top of the air guide cover (25) is open, and the rotating groove (26) passes through the air guide cover (25); The roller (21) is provided with evenly distributed air grooves (27), and the gap between the two rollers (21) is vertically aligned with the opening of the air guide cover (25).

2. The underwater earthquake detection device according to claim 1, characterized in that: The roller (21) is rotatably mounted with evenly distributed sealing rollers (3), and the roller (21) is connected to the inner wall of the air guide cover (25) in a rolling and sealing manner via the sealing rollers (3); A sealing strip (31) is fixedly installed at the position where the air guide cover (25) is penetrated by the rotating groove (26), and the sealing strip (31) is used to block the gap between the roller (21) and the air guide cover (25).

3. The underwater earthquake detection device according to claim 2, characterized in that: A symmetrically designed guide plate (32) is fixedly installed in the separation tube (12), and the two guide plates (32) are designed in an eight-shaped shape. The guide plates (32) are used to guide bubbles to flow into the gap of the roller (21).

4. The underwater earthquake detection device according to claim 1, characterized in that: An elastic membrane (4) is fixedly installed in the water storage chamber (22), a counterweight (41) is fixedly installed in the middle of the elastic membrane (4), and the counterweight (41) cooperates with the elastic membrane (4) to adjust the pressure of the water storage chamber (22).

5. The underwater earthquake detection device according to claim 4, characterized in that: The water storage chamber (22) is designed to be axisymmetric on the drum (21), and the two symmetrical water storage chambers (22) are close to each other at one end and are connected by a ventilation pipe (42).

6. The underwater earthquake detection device according to claim 5, characterized in that: The gravity plug (24) is designed in an I-shape, and the gravity plug (24) extends into the water storage chamber (22). An air outlet slot (43) is provided on the gravity plug (24). A rubber sleeve (5) is fixedly installed in the water storage chamber (22), and the rubber sleeve (5) is sleeved on the gravity plug (24). The rubber sleeve (5) blocks the air outlet slot (43). When the gravity plug (24) is located at the top of the drum (21), the rubber sleeve (5) and the air outlet slot (43) are misaligned.

7. The underwater earthquake detection device according to claim 6, characterized in that: The gravity plug (24) and the counterweight (41) are elastically connected via an elastic rope (51).

8. A method for using an underwater earthquake detection device, characterized in that: The method of use adopts the underwater seismic detection device according to claim 7, and the method of use comprises the following steps: S1. Assembly: After assembling the seismic detection device outside the well, hoist it into the well to be monitored, and then connect the gas collecting hood (1) to the digital observation device using a pipeline; S2, bubbling: The staff controls the bubbler (13) to start through a pre-set program, and the bubbler (13) continuously pumps dense bubbles into the separation tube (12). During the process of the bubbles floating up, the slightly soluble radon gas in the water is released; S3, overflow: bubbles rise and converge into airflow, which drives the forced circulation component to start, causing the water in the separation tube (12) to flow into the overflow tank (2), prompting the water to form a circulating flow in the separation tube (12); S4. Detection: The airflow converges in the gas collecting hood (1) and flows into the digital observation device along the pipe on the gas collecting hood (1), thereby monitoring the radon gas content for a long time, providing data support for earthquake early warning.

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