Deep-sea methane gas identification device and method

Abstract

The application discloses a deep-sea methane gas recognition device and method, relates to the technical field of deep-sea methane gas recognition, and comprises a detection box, both sides of the detection box are fixedly connected with mounting plates. The deep-sea methane gas recognition device and method have the advantages that when methane gas in the deep sea is recognized, a forward-reverse motor is started, the forward-reverse motor drives a collecting nozzle to deflect up and down, so that the seawater collection range is improved; the seawater collected in a single extraction process is introduced into a mixing cylinder, the seawater is quickly mixed through extrusion cooperation between a conical stirring rod and a conical follower rod, most of the seawater is discharged through a drain hole, and a small amount of seawater is introduced into a laser detector, so that in a single methane gas recognition operation, seawater in a larger range is collected, the methane gas recognition efficiency is improved, and in a short period, seawater in a large range is collected and mixed, so that the effect of inaccuracy of a recognition result caused by rapid diffusion of methane gas is avoided.

Description

Technical Field

[0001] This invention relates to the field of deep-sea methane gas identification technology, and in particular to a deep-sea methane gas identification device and method. Background Technology

[0002] Currently, reports of seafloor gas leaks have been found in many sea areas worldwide. These leaked gases may originate from long-standing oil and gas systems in the underlying strata, or from hydrocarbons (mainly CH4, etc.) released from the decomposition of seafloor natural gas hydrates. Measuring the flux and chemical composition of these leaked gases is of great significance for detecting marine oil and gas resources, exploring natural gas hydrates, understanding the greenhouse effect, and monitoring the marine hydrocarbon generation environment.

[0003] Existing deep-sea methane gas detection devices use pumps to draw water from the deep sea into a detection tank, where a laser detector analyzes the presence of methane gas. However, the vastness of the deep sea and the low detection capacity of these devices mean they cannot cover a large area quickly enough. This results in methane gas spreading faster than it can be detected, reducing the device's practical value. Summary of the Invention

[0004] This invention discloses a deep-sea methane gas identification device, aiming to solve the problem that existing deep-sea methane gas identification devices all use a pump to introduce deep-sea water into a detection tank, and then use a laser detector to detect the seawater to analyze whether methane gas is present. However, the deep sea is too large, and the single detection capacity of such identification devices is too low. This will cause the identification device to be unable to complete the detection of a large area in a short period of time, resulting in the methane gas diffusion rate being greater than the detection rate.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A deep-sea methane gas identification device includes a detection box. Mounting plates are fixedly connected to both sides of the detection box. A range collection and mixing assembly is provided on the outer side of the detection box and the mounting plates. The range collection and mixing assembly includes a mixing cylinder and a range plate. The mixing cylinder is fixedly connected to the outer side of the detection box, and the range plate is fixedly connected to the outer side of the two mounting plates. A partition cover is fixedly connected inside the mixing cylinder. Two follower shafts are connected to the top inner wall of the mixing cylinder within the partition cover via bearings. A base plate is fixedly connected to the bottom of the mixing cylinder. Conical follower rods are fixedly connected to the outer side of each of the two follower shafts. A motor housing is fixedly connected to the bottom of the base plate between the two conical follower rods. A drive motor is fixedly connected to the inner wall of the motor housing. The output shaft of the drive motor is fixedly connected to a drive shaft via a coupling. A conical stirring rod is fixedly connected to the outside of the base plate, which is located between two conical follower rods. Drainage holes are evenly spaced at the top of the base plate. Connection holes are evenly spaced on the outside of the mixing cylinder near the conical follower rods, and an inlet pipe is fixedly connected inside each connection hole. A collection nozzle is provided at the other end of each inlet pipe. Adjustment grooves are evenly spaced on the outside of the range plate, and a deflection rod is slidably connected inside each adjustment groove. The collection nozzle is fixedly connected to the outer side of the deflection rod located above. A forward and reverse motor is fixedly connected to the outside of one of the mounting plates, and the output shaft of the forward and reverse motor is fixedly connected to a rotating shaft through a coupling. The other end of the rotating shaft is connected to the outside of another mounting plate through a bearing. A follower frame is fixedly connected to the outside of the rotating shaft, and each deflection rod is fixedly connected to the outside of the follower frame.

[0007] By incorporating a range-collecting and mixing component, when identifying methane gas in the deep sea, an extraction pump is activated. The pump collects seawater through various collection nozzles. During the collection process, a forward and reverse motor is activated, causing the collection nozzles to deflect up and down, thereby increasing the seawater collection range. The seawater collected in a single extraction is introduced into a mixing cylinder, where a drive motor is activated. This drive motor rotates a conical stirring rod, and the seawater is quickly mixed through the squeezing action between the conical stirring rod and the conical follower rod. Most of the seawater is discharged through the drain hole, while a small amount is introduced into the laser detector. This allows for the collection of seawater over a larger area in a single methane gas identification operation, thereby improving the efficiency of methane gas identification. At the same time, the large-scale seawater collection and mixing in a short period of time avoids the inaccuracy of identification results caused by the rapid diffusion of methane gas.

[0008] In a preferred embodiment, a laser detector is fixedly connected inside the detection box, and an external pipe is fixedly connected to the discharge port of the laser detector. The other end of the external pipe is located outside the detection box. A suction pump is fixedly connected to the bottom inner wall of the detection box near the inlet port of the laser detector. The suction end of the suction pump is connected to the inside of the partition cover through a pipe, and the delivery end of the suction pump is connected to the inlet port of the laser detector through a pipe.

[0009] In a preferred embodiment, a vibration conversion assembly is provided on the outside of the motor housing, and the vibration conversion assembly includes a shaft block and an annular guide rail. The shaft block is connected to the bottom of the motor housing via bearings. Two hangers are fixedly connected to the outside of the motor housing, and the annular guide rail is fixedly connected to the outside of the two hangers. Annular metal strip one and annular metal strip two are fixedly connected inside the annular guide rail. Multiple elastic connecting ropes are distributed in annularly at the bottom of the shaft block. The other end of each elastic connecting rope is provided with a metal ball, which is slidably connected inside the annular guide rail. The metal ball is located between annular metal strip one and annular metal strip two.

[0010] By incorporating a vibration conversion component, the drive motor generates significant vibrations during deep-sea methane identification operations. These vibrations are transmitted to the annular guide rail via the boom. Simultaneously, the flowing seawater in the deep sea causes a metal ball on the elastic connecting rope to rotate within the annular guide rail. The rotating metal ball collides with two annular metal strips, thereby transmitting sound waves to the outside world. This dissipates marine life, preventing damage to the identification device caused by the movement of marine organisms.

[0011] In a preferred embodiment, the testing box is provided with counterweight adjustment components on both sides, and the counterweight adjustment components include two placement frames. Mounting brackets are fixedly connected to the outer sides of both placement frames, and the two mounting brackets are fixedly connected to both sides of the testing box. A central upright is fixedly connected to the bottom inner wall of the placement frame, and an upper circular plate is fixedly connected to the top of the central upright. A socket bracket is distributed in a ring at the bottom of the upper circular plate, and a counterweight block is slidably connected to the outer side of each socket bracket. A suspension airbag is provided on the inner side of the placement frame, and an exhaust hole is opened on the outer side of the suspension airbag. An exhaust pipe is fixedly connected inside the exhaust hole, and a one-way valve is connected to the outer side of the exhaust pipe via a flange. The one-way valve points from the inside of the suspension airbag to the outside of the suspension airbag. A gas storage tank is fixedly connected to the top of the testing box, and air pumps are fixedly connected to the top of both ends of the gas storage tank. The air pump's inlet end is connected to the inside of the gas storage tank via a pipe, and the air pump's outlet end is fixedly connected to a guide pipe. The other end of the guide pipe is fixedly connected to the inside of the suspension airbag.

[0012] Equipped with a counterweight adjustment component, the weight of the counterweight is adjusted according to the depth of the device when it is placed in the deep sea. During adjustment, when the buoyancy it experiences is low, the air pump is activated, which introduces gas from the air tank into the suspension airbag. This suspension airbag partially offsets the weight of the counterweight, ensuring that the identification device can float in the sea. When the buoyancy it experiences is high, the one-way valve is opened to expel the gas from the suspension airbag, so that the weight of the counterweight is fully used to counteract the buoyancy of the water, ensuring that the device can be used in seawater at different depths.

[0013] A method for identifying deep-sea methane gas, using a deep-sea methane gas identification device as described above, the identification method comprising the following steps:

[0014] Step 1: When identifying methane gas in the deep sea, start the extraction pump. The extraction pump collects seawater through various collection nozzles. During the collection process, start the forward and reverse motors. The forward and reverse motors drive the collection nozzles to deflect up and down, thereby increasing the seawater collection range.

[0015] Step 2: The seawater collected during a single extraction is introduced into the mixing drum. The drive motor is started, and the drive motor drives the conical stirring rod to rotate. Through the squeezing and cooperation between the conical stirring rod and the conical follower rod, the seawater is quickly mixed. Most of the seawater is discharged through the drain hole, and a small amount of seawater is introduced into the laser detector.

[0016] Step 3: After the laser detector tests a small amount of seawater, it is exported through the external pipe, and the test results are then fed back to the back-end control terminal.

[0017] As can be seen from the above, the deep-sea methane gas identification device provided by the present invention has the following technical effects: when identifying methane gas in the deep sea, the extraction pump is started, and the extraction pump collects seawater through various collection nozzles. During the collection process, a forward and reverse motor is started, which drives the collection nozzles to deflect up and down, thereby increasing the seawater collection range. The seawater collected in a single extraction process is introduced into a mixing cylinder, and the drive motor is started, which drives the conical stirring rod to rotate. Through the squeezing and cooperation between the conical stirring rod and the conical follower rod, the seawater is quickly mixed. Most of the seawater is discharged through the drain hole, and a small amount of seawater is introduced into the laser detector. Thus, in a single methane gas identification operation, a larger area of ​​seawater is collected, thereby improving the methane gas identification efficiency. At the same time, the technical effect of collecting and mixing a large area of ​​seawater in a short period of time avoids the inaccuracy of the identification results caused by the rapid diffusion of methane gas. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of a deep-sea methane gas identification device proposed in this invention.

[0019] Figure 2 This is a front view of the overall structure of a deep-sea methane gas identification device proposed in this invention.

[0020] Figure 3 This is a schematic diagram of the range collection and mixing component of a deep-sea methane gas identification device proposed in this invention.

[0021] Figure 4 This is a schematic diagram of the internal structure of the mixing cylinder of a deep-sea methane gas identification device proposed in this invention.

[0022] Figure 5 This is a schematic diagram of the vibration conversion component of a deep-sea methane gas identification device proposed in this invention.

[0023] Figure 6 This is a cross-sectional view of the annular guide rail structure of a deep-sea methane gas identification device proposed in this invention.

[0024] Figure 7 This is a schematic diagram of the counterweight adjustment component of a deep-sea methane gas identification device proposed in this invention.

[0025] In the diagram: 1. Detection box; 2. Counterweight adjustment assembly; 201. Placement frame; 202. Upper circular plate; 203. Air tank; 204. Air pump; 205. Mounting bracket; 206. Suspension airbag; 207. Central upright; 208. Air guide pipe; 209. Connecting bracket; 210. Exhaust pipe; 211. One-way valve; 212. Counterweight block; 3. Mounting plate; 4. Range collection and mixing assembly; 401. Range plate; 402. Mixing cylinder; 403. Forward and reverse motor; 404. Deflection rod; 405. Inlet pipe; 406. Collection nozzle; 407. 408. Adjusting trough; 409. Rotating shaft; 410. Follower frame; 411. Drive motor; 412. Motor housing; 413. Drain hole; 414. Conical follower rod; 415. Conical stirring rod; 416. Drive shaft; 417. Base plate; 418. Follower shaft; 419. Separator cover; 5. Vibration conversion assembly; 501. Annular guide rail; 502. Hanging rod; 503. Metal ball; 504. Elastic connecting rope; 505. Shaft block; 506. Annular metal strip one; 507. Annular metal strip two; 6. Extraction pump; 7. External pipe; 8. Laser detector. Detailed Implementation

[0026] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0027] The deep-sea methane gas identification device disclosed in this invention is mainly applied to existing deep-sea methane gas identification devices. In use, these devices use a pump to introduce water from the deep sea into a detection tank, and then use a laser detector to detect the seawater to analyze whether methane gas is present. However, the deep sea is too large, and the single detection capacity of such devices is too low. This will cause the device to be unable to complete the detection of a large area in a short period of time, resulting in a scenario where the methane gas diffusion rate is greater than the detection rate.

[0028] Reference Figures 1-7A deep-sea methane gas identification device includes a detection box 1. Mounting plates 3 are fixedly connected to both sides of the detection box 1. A range collection and mixing assembly 4 is provided on the outer side of the detection box 1 and the mounting plates 3. The range collection and mixing assembly 4 includes a mixing cylinder 402 and a range plate 401. The mixing cylinder 402 is fixedly connected to the outer side of the detection box 1, and the range plate 401 is fixedly connected to the outer side of the two mounting plates 3. A partition cover 418 is fixedly connected inside the mixing cylinder 402. Two follower shafts 417 are connected to the top inner wall of the mixing cylinder 402 within the partition cover 418 via bearings. A bottom plate 416 is fixedly connected to the bottom of the mixing cylinder 402. Conical follower rods 413 are fixedly connected to the outer side of each of the two follower shafts 417. A motor housing 411 is fixedly connected to the bottom of the bottom plate 416 between the two conical follower rods 413. A drive motor 410 is fixedly connected to the inner wall of the motor housing 411. A drive shaft 415 is fixedly connected to the output shaft of the drive motor 410 via a coupling. A conical stirring rod 414 is fixedly connected between two conical follower rods 413. Drainage holes 412 are evenly spaced at the top of the bottom plate 416. Connection holes are evenly spaced on the outer side of the mixing cylinder 402 near the conical follower rods 413, and an inlet pipe 405 is fixedly connected inside each connection hole. A collection nozzle 406 is provided at the other end of each inlet pipe 405. Adjustment grooves 407 are evenly spaced on the outer side of the range plate 401, and each adjustment groove 407 has a sliding groove inside. A deflection rod 404 is dynamically connected, and a collection nozzle 406 is fixedly connected to the outer side of the deflection rod 404 located above. A forward and reverse motor 403 is fixedly connected to the outer side of one of the mounting plates 3, and the output shaft of the forward and reverse motor 403 is fixedly connected to a rotating shaft 408 through a coupling. The other end of the rotating shaft 408 is connected to the outer side of another mounting plate 3 through a bearing. A follower frame 409 is fixedly connected to the outer side of the rotating shaft 408, and each deflection rod 404 is fixedly connected to the outer side of the follower frame 409.

[0029] In a specific application scenario, when identifying methane gas in the deep sea, the extraction pump 6 is activated. The extraction pump 6 collects seawater through various collection nozzles 406. During the collection process, the forward and reverse motor 403 is activated, which drives the collection nozzles 406 to deflect up and down, thereby increasing the seawater collection range. The seawater collected in a single extraction is introduced into the mixing cylinder 402. The drive motor 410 is activated, which drives the conical stirring rod 414 to rotate. Through the squeezing and cooperation between the conical stirring rod 414 and the conical follower rod 413, the seawater is quickly mixed. Most of the seawater is discharged through the drain hole 412, and a small amount of seawater is introduced into the laser detector 8. Thus, in a single methane gas identification operation, a larger area of ​​seawater is collected, thereby improving the methane gas identification efficiency. At the same time, large-scale seawater collection and mixing in a short period of time avoids the inaccuracy of the identification results caused by the rapid diffusion of methane gas.

[0030] Reference Figure 1 , Figure 2 and Figure 3 In a preferred embodiment, a laser detector 8 is fixedly connected inside the detection box 1, and an external pipe 7 is fixedly connected to the discharge port of the laser detector 8. The other end of the external pipe 7 is located outside the detection box 1. A suction pump 6 is fixedly connected to the bottom inner wall of the detection box 1 near the inlet port of the laser detector 8. The suction end of the suction pump 6 is connected to the inside of the partition cover 418 through a pipe, and the delivery end of the suction pump 6 is connected to the inlet port of the laser detector 8 through a pipe.

[0031] Reference Figure 1 , Figure 2 and Figure 5 , Figure 6 In a preferred embodiment, a vibration conversion component 5 is provided on the outer side of the motor housing 411, and the vibration conversion component 5 includes a shaft block 505 and an annular guide rail 501. The shaft block 505 is connected to the bottom of the motor housing 411 by a bearing. Two hanging rods 502 are fixedly connected to the outer side of the motor housing 411. The annular guide rail 501 is fixedly connected to the outer side of the two hanging rods 502. Annular metal strip 1 506 and annular metal strip 2 507 are fixedly connected inside the annular guide rail 501. A plurality of elastic connecting ropes 504 are distributed in annularly at the bottom of the shaft block 505. The other end of each elastic connecting rope 504 is provided with a metal ball 503. The metal ball 503 is slidably connected inside the annular guide rail 501 and is located between annular metal strip 1 506 and annular metal strip 2 507.

[0032] Specifically, during the deep-sea methane identification operation, the drive motor 410 generates significant vibrations during operation. These vibrations are transmitted to the annular guide rail 501 via the boom 502. Simultaneously, the flowing seawater in the deep sea causes the metal ball 503 on the elastic connecting rope 504 to rotate within the annular guide rail 501. The rotating metal ball 503 collides with the first annular metal strip 506 and the second annular metal strip 507, thereby transmitting sound waves to the outside world. This has a dispersing effect on marine life, preventing damage to the identification device caused by the movement of marine organisms.

[0033] Reference Figure 1 , Figure 2 and Figure 7In a preferred embodiment, the detection box 1 is provided with counterweight adjustment components 2 on both sides, and the counterweight adjustment components 2 include two placement frames 201. Mounting brackets 205 are fixedly connected to the outer sides of each of the two placement frames 201. The two mounting brackets 205 are fixedly connected to both sides of the detection box 1. A central upright 207 is fixedly connected to the bottom inner wall of the placement frame 201, and an upper circular plate 202 is fixedly connected to the top of the central upright 207. A ring of connecting brackets 209 is distributed around the bottom of the upper circular plate 202. A counterweight block 212 is slidably connected to the outer side of each connecting bracket 209. A suspension airbag 206 is provided on the inner side of the placement frame 201. An exhaust port is opened on the outside of the suspension airbag 206. An exhaust pipe 210 is fixedly connected inside the exhaust port. A one-way valve 211 is connected to the outside of the exhaust pipe 210 through a flange. The one-way valve 211 points from the inside of the suspension airbag 206 to the outside of the suspension airbag 206. An air tank 203 is fixedly connected to the top of the test box 1. An air pump 204 is fixedly connected to the top of both ends of the test box 1 at the air tank 203. The air inlet end of the air pump 204 is connected to the inside of the air tank 203 through a pipe. An air delivery end of the air pump 204 is fixedly connected to an air guide pipe 208. The other end of the air guide pipe 208 is fixedly connected to the inside of the suspension airbag 206.

[0034] It should be noted that when the device is placed in the deep sea, the weight of the counterweight 212 is adjusted according to the depth. During adjustment, when the buoyancy it bears is small, the air pump 204 is activated, and the air pump 204 introduces the gas inside the air tank 203 into the suspension airbag 206, thereby offsetting part of the weight of the counterweight 212 through the suspension airbag 206, ensuring that the identification device can float in the sea. When the buoyancy it bears is large, the one-way valve 211 is opened to discharge the gas inside the suspension airbag 206, so that the weight of the counterweight 212 is used entirely to offset the buoyancy of the water, ensuring that the device can be used in seawater at different depths.

[0035] A method for identifying deep-sea methane gas, using a deep-sea methane gas identification device as described above, includes the following steps:

[0036] Step 1: When identifying methane gas in the deep sea, start the extraction pump 6. The extraction pump 6 collects seawater through each collection nozzle 406. During the collection process, start the forward and reverse motor 403. The forward and reverse motor 403 drives the collection nozzle 406 to deflect up and down, thereby increasing the seawater collection range.

[0037] Step 2: The seawater collected during the single extraction process is introduced into the mixing cylinder 402. The drive motor 410 is started, and the drive motor 410 drives the conical stirring rod 414 to rotate. Through the squeezing and cooperation between the conical stirring rod 414 and the conical follower rod 413, the seawater is quickly mixed. Most of the seawater is discharged through the drain hole 412, and a small amount of seawater is introduced into the laser detector 8.

[0038] Step 3: After the laser detector 8 detects a small amount of seawater, it exports it through the external pipe 7 and then feeds the detection results back to the background control terminal.

[0039] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A deep-sea methane gas identification device, comprising a detection box (1), characterized in that, Mounting plates (3) are fixedly connected to both sides of the detection box (1), and a range collection and mixing assembly (4) is provided on the outside of the detection box (1) and the mounting plates (3). The range collection and mixing assembly (4) includes a mixing cylinder (402) and a range plate (401). The mixing cylinder (402) is fixedly connected to the outside of the detection box (1), and the range plate (401) is fixedly connected to the outside of the two mounting plates (3). A partition cover (418) is fixedly connected inside the mixing cylinder (402), and the mixing cylinder (402) is located inside the top of the partition cover (418). The wall is connected to two follower shafts (417) via bearings. A base plate (416) is fixedly connected to the bottom of the mixing drum (402). Conical follower rods (413) are fixedly connected to the outer sides of both follower shafts (417). A motor housing (411) is fixedly connected to the bottom of the base plate (416) between the two conical follower rods (413). A drive motor (410) is fixedly connected to the inner wall of the motor housing (411). The output shaft of the drive motor (410) is fixedly connected to a drive shaft (415) via a coupling. A conical follower rod (415) is fixedly connected to the outer side of the drive shaft (415). A conical stirring rod (414) is located between two conical follower rods (413). Drainage holes (412) are evenly spaced on the top of the bottom plate (416). The mixing cylinder (402) has connecting holes evenly spaced on the outer side near the conical follower rods (413), and each connecting hole is fixedly connected to an inlet pipe (405). The other end of each inlet pipe (405) is provided with a collection nozzle (406). Adjustment grooves (407) are evenly spaced on the outer side of the range plate (401), and each adjustment groove (407) is slidably connected inside. There is a deflection rod (404), and a collection nozzle (406) is fixedly connected to the outer side of the deflection rod (404) located above; a forward and reverse motor (403) is fixedly connected to the outer side of one of the mounting plates (3), and the output shaft of the forward and reverse motor (403) is fixedly connected to a rotating shaft (408) through a coupling. The other end of the rotating shaft (408) is connected to the outer side of another mounting plate (3) through a bearing. A follower frame (409) is fixedly connected to the outer side of the rotating shaft (408), and each deflection rod (404) is fixedly connected to the outer side of the follower frame (409).

2. The deep-sea methane gas identification device according to claim 1, characterized in that, The detection box (1) is fixedly connected to a laser detector (8), and the discharge port of the laser detector (8) is fixedly connected to an external pipe (7). The other end of the external pipe (7) is located on the outside of the detection box (1). The bottom inner wall of the detection box (1) near the inlet port of the laser detector (8) is fixedly connected to a pump (6). The extraction end of the pump (6) is connected to the inside of the partition cover (418) through a pipe, and the delivery end of the pump (6) is connected to the inlet port of the laser detector (8) through a pipe.

3. The deep-sea methane gas identification device according to claim 2, characterized in that, The motor housing (411) is provided with a vibration conversion component (5) on the outside, and the vibration conversion component (5) includes a shaft block (505) and an annular guide rail (501). The shaft block (505) is connected to the bottom of the motor housing (411) by a bearing. Two hangers (502) are fixedly connected to the outside of the motor housing (411), and the annular guide rail (501) is fixedly connected to the outside of the two hangers (502).

4. The deep-sea methane gas identification device according to claim 3, characterized in that, The annular guide rail (501) is internally fixedly connected with annular metal strip one (506) and annular metal strip two (507), and multiple elastic connecting ropes (504) are distributed in annularly at the bottom of the shaft block (505). Each elastic connecting rope (504) has a metal ball (503) at the other end. The metal ball (503) is slidably connected to the inside of the annular guide rail (501) and is located between annular metal strip one (506) and annular metal strip two (507).

5. A deep-sea methane gas identification device according to claim 4, characterized in that, The testing box (1) is provided with a counterweight adjustment assembly (2) on both sides, and the counterweight adjustment assembly (2) includes two placement frames (201). The outer sides of the two placement frames (201) are fixedly connected with mounting brackets (205), and the two mounting brackets (205) are fixedly connected to both sides of the testing box (1).

6. A deep-sea methane gas identification device according to claim 5, characterized in that, The bottom inner wall of the placement frame (201) is fixedly connected to a central upright (207), and the top of the central upright (207) is fixedly connected to an upper circular plate (202). The bottom of the upper circular plate (202) is circumferentially distributed with sockets (209). Each socket (209) is slidably connected to a counterweight (212). The inner side of the placement frame (201) is provided with a suspension airbag (206). The outer side of the suspension airbag (206) has an exhaust hole. The exhaust hole is fixedly connected to an exhaust pipe (210). The outer side of the exhaust pipe (210) is connected to a one-way valve (211) through a flange. The one-way valve (211) points from the inside of the suspension airbag (206) to the outside of the suspension airbag (206).

7. A deep-sea methane gas identification device according to claim 6, characterized in that, The top of the test box (1) is fixedly connected to a gas storage tank (203), and the top of both ends of the test box (1) is fixedly connected to an air pump (204). The air inlet of the air pump (204) is connected to the inside of the gas storage tank (203) through a pipe, and the air delivery end of the air pump (204) is fixedly connected to an air guide pipe (208). The other end of the air guide pipe (208) is fixedly connected to the inside of the suspension airbag (206).

8. A method for identifying deep-sea methane gas, using a deep-sea methane gas identification device as described in claim 7, characterized in that, The identification method includes the following steps: Step 1: When identifying methane gas in the deep sea, start the extraction pump (6). The extraction pump (6) collects seawater through each collection nozzle (406). During the collection process, start the forward and reverse motor (403). The forward and reverse motor (403) drives the collection nozzle (406) to deflect up and down, thereby increasing the seawater collection range. Step 2: The seawater collected during the single extraction process is introduced into the mixing cylinder (402), and the drive motor (410) is started. The drive motor (410) drives the conical stirring rod (414) to rotate. Through the squeezing and cooperation between the conical stirring rod (414) and the conical follower rod (413), the seawater is quickly mixed. Most of the seawater is discharged through the drain hole (412), and a small amount of seawater is introduced into the laser detector (8). Step 3: The laser detector (8) detects a small amount of seawater and then exports it through the external pipe (7), and then feeds the detection results back to the background control terminal.

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