Closed airflow detection device based on internal pressure increase

Abstract

The present invention discloses a closed airflow detection device based on increased internal pressure, which is applied in the technical field of closed airflow detection. The present invention can place a gas tank in a water tank filled with water by arranging a water tank, a cover plate, a sonic wave transmitter, a central controller, a simulation display, a detection structure and a driving wheel. When a leakage point appears in the gas tank, bubbles will appear at the leakage point and move to the water surface. At this time, the sonic wave transmitter transmits the bubble signal to the central controller and simulates the movement path of the bubble, so as to control the driving wheel and the detection structure to mark the leakage point of the gas tank, so that the gas tank can be comprehensively detected and the leakage defect position can be accurately marked, instead of the manual observation method.

Description

Technical Field

[0001] The present invention belongs to the technical field of enclosed airflow detection, and in particular relates to an enclosed airflow detection device based on increased internal pressure. Background Art

[0002] Due to the inherent characteristics of the gas tank, it will face a variety of usage situations when it is used, but it is not limited to the one proposed below. More specifically, since the gas tank is formed by welding multiple steel plates, after the internal pressure increases, the closed space in the gas tank will be broken due to problems such as cold welding at the welding parts, which is easy to cause leakage. Therefore, it is necessary to perform airflow detection on it. The conventional detection method is to fill the gas tank to be tested with gas and immerse it in liquid, and judge whether there is a leak by manually observing whether there are bubbles. However, due to the weight of the gas tank itself, it is not possible to effectively observe all the interfaces to be tested, and it is not easy to detect the defective parts of airflow leakage;

[0003] Combining the above-mentioned problems, it is found that it is difficult to avoid the above-mentioned problems when the existing devices on the market are in use, and even if they can be solved, they need to be connected to external devices, which makes it impossible to achieve the desired effect. Therefore, we propose a closed airflow detection device based on increased internal pressure, which can fully detect leakage of energy storage gas tanks when in use. Summary of the invention

[0004] The purpose of the present invention is to target the existing closed airflow detection device based on increased internal pressure. The present invention has the advantage that by arranging a water tank, a cover plate, an acoustic wave transmitter, a central controller, an analog display, a detection structure and a driving wheel, a gas tank can be placed in a water tank filled with water. When a leak occurs in the gas tank, bubbles will appear at the leak and move to the water surface. At this time, the acoustic wave transmitter transmits the bubble signal to the central controller and simulates the movement path of the bubble, thereby controlling the driving wheel and the detection structure to mark the leak point of the gas tank, so that the gas tank can be comprehensively detected and the leak defect location can be accurately marked, replacing the method of manual observation.

[0005] The above technical objectives of the present invention are achieved through the following technical solutions: a closed airflow detection device based on increased internal pressure, including a water tank, a cover plate, a sound wave transmitter, a central controller and an analog display, the cover plate is slidably connected to the top of the water tank, the sound wave transmitter is arranged at the bottom and both sides of the inner wall of the water tank and the bottom of the cover plate, the analog display and the central controller are both arranged on the front side of the water tank, the inside of the water tank is bolted with a detection structure, the detection structure includes a holding mechanism, the top of the holding mechanism is rotatably connected to a driving wheel, the top of the driving wheel is rotatably in contact with a gas tank, the surface of the holding mechanism is rotatably connected to a positioning mechanism, the positioning mechanism is in rotational contact with the gas tank, the top of the positioning mechanism is bolted with a marking mechanism, and the marking mechanism is used in conjunction with the gas tank.

[0006] By adopting the above technical solution, a gas tank can be placed in a water tank filled with water by setting a water tank, a cover plate, an acoustic wave transmitter, a central controller, an analog display, a detection structure and a driving wheel. When a leak occurs in the gas tank, bubbles will appear at the leak point and move to the water surface. At this time, the acoustic wave transmitter transmits the bubble signal to the central controller and simulates the movement path of the bubble, thereby controlling the driving wheel and the detection structure to mark the leak point of the gas tank, so that the gas tank can be comprehensively inspected and the leak defect location can be accurately marked, replacing the method of manual observation.

[0007] The present invention is further configured as follows: the retaining mechanism includes two support plates, one side of the support plate close to the inner wall of the water tank is bolted to the water tank, both sides between the opposite sides of the two support plates are bolted with support rods, the surface of the support rod is sleeved with two connecting plates, a support box is bolted between the opposite sides of the front and rear connecting plates, the driving wheel is rotatably connected to the top of the inside of the support box, and the positioning mechanism is rotatably connected to the surface of the support rod.

[0008] By adopting the above technical solution, by setting up a retaining mechanism, and by using the support plate, support rod, connecting plate and support box in coordination, it is possible to facilitate the support of the gas tank and the installation of the positioning mechanism and the marking mechanism, thereby achieving the effect of closed airflow detection on the gas tank.

[0009] The present invention is further configured as follows: the positioning mechanism includes a moving component and two limit components, the moving component includes a double-axis cylinder, the double-axis cylinder is bolted to the inside of a support box, both sides of the double-axis cylinder extend to both sides of the support box and are bolted with a synchronization plate, the side of the synchronization plate away from the support box is bolted with a connecting rod, the inside of the connecting rod is rotatably connected to a pull rod, and the pull rod is rotatably connected to the limit component.

[0010] By adopting the above technical solution, by setting up a positioning mechanism, through the coordinated use of the moving assembly and the limit assembly, and through the action of the double-axis cylinder, the synchronous plate can drive the connecting rod and the pulling rod to move, so that the two limit assemblies are opened or closed synchronously, thereby realizing or releasing the positioning effect of the gas storage tank.

[0011] The present invention is further configured as follows: the limit assembly includes two rotating sleeves, the rotating sleeves are rotatably connected to the support rod, a limit rod is welded to the top of the rotating sleeve, the limit rod is in rotational contact with the surface of the gas tank, a pull rod is welded on the side of the rotating sleeve away from the support rod, the pull rod is rotatably connected to the pull rod, and the limit rod is bolted to the marking mechanism.

[0012] By adopting the above technical solution, by setting a limit assembly, the pull rod will be forced to move under the action of the moving assembly, and the rotating sleeve will drive the limit rod to limit the gas tank, which can prevent the gas tank from moving randomly in the water tank and ensure the accuracy of the test results.

[0013] The present invention is further configured as follows: the marking mechanism includes a mounting block, the mounting block is bolted to two limit rods on the right side, the internal rotation of the mounting block is connected to a lifting shaft, the bottom of the lifting shaft is bolted to a fixing rod, two clamping blocks are welded on the front side of the fixing rod, a marking pen is clamped between the opposite sides of the two clamping blocks, and the marking pen is used in conjunction with a gas tank.

[0014] By adopting the above technical solution and setting up a marking mechanism, when marking the leakage point of the gas tank, since the lifting shaft is driven by an external drive device and connected to the central controller, the lifting shaft can be rotated and lowered inside the mounting block. Driven by the fixed rod, the marking pen can make a circular rotation at the position of the leakage point of the gas tank to mark it, which is convenient for the later repair work of the gas tank and enables the staff to accurately understand the leakage location.

[0015] The present invention is further configured as follows: the top of the support box is configured as an arc-shaped groove, the driving wheel is rotatably connected in the arc-shaped groove, and the number of driving wheels is several and evenly distributed on the front and rear sides inside the arc-shaped groove.

[0016] By adopting the above technical solution, the top of the support box is provided with an arc-shaped groove, which can facilitate the fitting of the gas tank. By having a plurality of driving wheels evenly distributed on the front and rear sides of the arc-shaped groove, the gas tank can be evenly rotated and the effect of supporting the gas tank can be achieved.

[0017] The present invention is further configured as follows: the number of the sound wave transmitters is several, and they are installed on the side walls and bottom of the water tank and the bottom of the cover plate with the axis of the gas tank as the direction, and the sound wave transmitters are arranged in multiple groups horizontally, and the sound wave transmitters are electrically connected to the analog display.

[0018] By adopting the above technical solution, a number of sound wave emitters are provided, and they are installed on the side walls, bottom and bottom of the cover plate inside the water tank with the axis of the gas tank as the direction, and the sound wave emitters are arranged in multiple groups horizontally, which can facilitate the detection of the movement path of the bubbles at the leakage point of the gas tank, thereby facilitating the detection of the leakage point of the gas tank.

[0019] The present invention is further configured as follows: the lower end of the fixing rod is inclined, the clamping block is made of elastic material, and the marking pen is an oil-based marker.

[0020] By adopting the above technical solution, the lower end of the fixing rod is inclined, which can facilitate the circular rotation of the marking pen. The clamping block is made of elastic material, which can clamp the marking pen. The marking pen is an oily marker pen, which can prevent the mark from being dissolved by water.

[0021] The present invention is further configured as follows: the number of the connecting rods and the pulling rods are both four, and they are evenly distributed on a side of the synchronization plate away from the dual-axis cylinder.

[0022] By adopting the above technical solution, the number of connecting rods and pulling rods is four, and they are evenly distributed on the side of the synchronization plate away from the dual-axis cylinder, so that the movement stability of the moving limit assembly can be improved.

[0023] The method for using the closed airflow detection device based on internal pressure increase comprises the following steps:

[0024] S1. When a leak occurs at the top of the gas tank welding, the central controller transmits the elastic waves of multiple acoustic wave transmitters to the gas tank in the direction of the axis of the gas tank. When bubbles appear at the leak point of the gas tank, the multiple corresponding acoustic wave transmitters continuously transmit the irregular fracture path signal of the bubbles at the leak point under water pressure to the calculation module, and the calculation module simulates the bubble path at the leak point of the gas tank, thereby simulating the leakage direction of the gas tank, and then the central controller controls the marking mechanism to mark the leak point;

[0025] S2. When leakage occurs at the bottom or side of the gas tank, the analog display controls the driving wheel through the central controller to rotate the gas tank, and the acoustic wave transmitter again emits elastic waves toward the axis of the gas tank for measurement. When the bubbles at the leakage point of the gas tank are measured again to have an irregular fracture path under the water pressure, the calculation module is used to simulate the rupture direction of the gas tank again. When the driving wheel is controlled to move to a position that is easy to mark, the marking mechanism is used to mark.

[0026] In summary, the present invention has the following beneficial effects:

[0027] By setting up a water tank, a cover, an acoustic wave transmitter, a central controller, an analog display, a detection structure and a driving wheel, the gas tank can be placed in a water tank filled with water. When a leak occurs in the gas tank, bubbles will appear at the leak and move to the water surface. At this time, the acoustic wave transmitter transmits the bubble signal to the central controller and simulates the movement path of the bubble, thereby controlling the driving wheel and the detection structure to mark the leak point of the gas tank, so that the gas tank can be fully inspected and the leak defect location can be accurately marked, replacing the method of manual observation. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0029] Figure 2 It is a schematic diagram of the water tank structure of the present invention;

[0030] Figure 3 It is a schematic diagram of the structure of the detection mechanism of the present invention;

[0031] Figure 4 It is a schematic diagram of the detection mechanism and gas storage tank structure of the present invention;

[0032] Figure 5 It is a schematic diagram of the structure of the limit assembly of the present invention;

[0033] Figure 6 It is a schematic diagram of the structure of the mobile assembly of the present invention;

[0034] Figure 7 It is a schematic diagram of the marking mechanism structure of the present invention;

[0035] Figure 8 is a front view of a water tank of the present invention;

[0036] Fig. 9 It is a schematic diagram of the working process of the central controller of the present invention;

[0037] Fig.10 It is a schematic diagram of a detection method of a closed airflow detection device based on increased internal pressure of the present invention.

[0038] : 1. water tank; 2. cover plate; 3. sound wave transmitter; 4. central controller; 5. analog display; 6. detection structure; 601. holding mechanism; 6011. support plate; 6012. support rod; 6013. connecting plate; 6014. support box; 602. positioning mechanism; 6021. moving assembly; 60211. double-axis cylinder; 60212. synchronization plate; 60213. connecting rod; 60214. pulling rod; 6022. limiting assembly; 60221. rotating sleeve; 60222. limiting rod; 60223. pulling rod; 603. marking mechanism; 6031. mounting block; 6032. lifting shaft; 6033. fixing rod; 6034. clamping block; 6035. marking pen; 7. driving wheel; 8. gas tank. DETAILED DESCRIPTION

[0039] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0040] refer to Figure 1-10 The enclosed airflow detection device based on the increase of internal pressure includes a water tank 1, a cover plate 2, a sound wave transmitter 3, a central controller 4 and an analog display 5. The cover plate 2 is slidably connected to the top of the water tank 1, the sound wave transmitter 3 is arranged at the bottom of the inner wall of the water tank 1 and the bottom of the cover plate 2 on both sides, the analog display 5 and the central controller 4 are both arranged on the front side of the water tank 1, and a detection structure 6 is bolted inside the water tank 1. The detection structure 6 includes a holding mechanism 601, the top of the holding mechanism 601 is rotatably connected to a driving wheel 7, the top of the driving wheel 7 is rotatably contacted with a gas tank 8, the surface of the holding mechanism 601 is rotatably connected to a positioning mechanism 602, the positioning mechanism 602 is rotatably contacted with the gas tank 8, and the positioning mechanism 602 is rotatably connected to the gas tank 8. A marking mechanism 603 is bolted to the top of the structure 602. The marking mechanism 603 is used in conjunction with the gas tank 8. By arranging the water tank 1, the cover plate 2, the sound wave transmitter 3, the central controller 4, the simulation display 5, the detection structure 6 and the driving wheel 7, the gas tank 8 can be placed in the water tank 1 filled with water. When a leak occurs in the gas tank 8, bubbles will appear at the leak point and move to the water surface. At this time, the sound wave transmitter 3 transmits the bubble signal to the central controller 4 and simulates the movement path of the bubble, thereby controlling the driving wheel 7 and the detection structure 6 to mark the leak point of the gas tank 8, so that the gas tank 8 can be comprehensively detected and the leak defect location can be accurately marked, replacing the method of manual observation.

[0041] like Figure 4As shown, the holding mechanism 601 includes two support plates 6011, and one side of the support plate 6011 close to the inner wall of the water tank 1 is bolted to the water tank 1, and support rods 6012 are bolted on both sides between the opposite sides of the two support plates 6011, and two connecting plates 6013 are sleeved on the surface of the support rod 6012, and a support box 6014 is bolted between the opposite sides of the two connecting plates 6013 on the front and rear sides, and the driving wheel 7 is rotatably connected to the top inside the support box 6014, and the positioning mechanism 602 is rotatably connected to the surface of the support rod 6012. By setting the holding mechanism 601, through the coordinated use of the support plate 6011, the support rod 6012, the connecting plate 6013 and the support box 6014, it is convenient to support the gas tank 8 and facilitate the installation of the positioning mechanism 602 and the marking mechanism 603, so that the effect of closed airflow detection of the gas tank 8 can be achieved.

[0042] like Figure 6 As shown, the positioning mechanism 602 includes a moving component 6021 and two limit components 6022. The moving component 6021 includes a double-axis cylinder 60211, and the double-axis cylinder 60211 is bolted to the inside of the support box 6014. Both sides of the double-axis cylinder 60211 extend to both sides of the support box 6014 and are bolted with a synchronous plate 60212. The synchronous plate 60212 is bolted to a connecting rod 60213 on one side away from the support box 6014. The internal rotation of the connecting rod 60213 The pull rod 60214 is rotatably connected to the limit assembly 6022. By setting the positioning mechanism 602, through the coordinated use of the moving assembly 6021 and the limit assembly 6022, under the action of the double-axis cylinder 60211, the synchronous plate 60212 can drive the connecting rod 60213 and the pull rod 60214 to move, so that the two limit assemblies 6022 are opened or closed synchronously, thereby realizing or releasing the positioning effect on the gas storage tank 8.

[0043] like Figure 5 As shown, the limit assembly 6022 includes two rotating sleeves 60221, the rotating sleeve 60221 is rotatably connected to the support rod 6012, the top of the rotating sleeve 60221 is welded with a limit rod 60222, the limit rod 60222 is in rotational contact with the surface of the gas tank 8, and a pull rod 60223 is welded on the side of the rotating sleeve 60221 away from the support rod 6012, the pull rod 60223 is rotatably connected to the pulling rod 60214, and the limit rod 60222 is bolted to the marking mechanism 603. By setting the limit assembly 6022, under the action of the moving assembly 6021, the pull rod 60223 will be forced to move, and the rotating sleeve 60221 will drive the limit rod 60222 to limit the gas tank 8, which can prevent the gas tank 8 from moving randomly in the water tank 1, thereby ensuring the accuracy of the detection result.

[0044] like Figure 7As shown, the marking mechanism 603 includes a mounting block 6031, which is bolted to two right-side limit rods 60222, and the mounting block 6031 is internally rotatably connected to a lifting shaft 6032, and a fixing rod 6033 is bolted to the bottom of the lifting shaft 6032. Two clamping blocks 6034 are welded to the front side of the fixing rod 6033, and a marking pen 6035 is clamped between the opposite sides of the two clamping blocks 6034. The marking pen 6035 is used in conjunction with the gas tank 8. By setting the marking mechanism 603, when marking the leakage point of the gas tank 8, since the lifting shaft 6032 is driven by an external drive device and connected to the central controller 4, the lifting shaft 6032 can be rotated and descended inside the mounting block 6031, and driven by the fixing rod 6033, the marking pen 6035 is rotated in a circle at the position of the leakage point of the gas tank 8 to mark it, which is convenient for the later repair work of the gas tank 8, so that the staff can accurately understand the leakage position.

[0045] like Figure 4 As shown, the top of the support box 6014 is provided with an arc-shaped groove, and the driving wheel 7 is rotatably connected in the arc-shaped groove, and the number of the driving wheels 7 is several and evenly distributed on the front and rear sides inside the arc-shaped groove. By providing the top of the support box 6014 with an arc-shaped groove, it is easy to fit the gas tank 8. By providing the number of the driving wheels 7 is several and evenly distributed on the front and rear sides inside the arc-shaped groove, the gas tank 8 can be evenly rotated, and the effect of supporting the gas tank 8 is achieved.

[0046] like Figure 2 and Figure 8 As shown, the number of the sound wave emitters 3 is several, and they are installed on the side walls and bottom of the water tank 1 and the bottom of the cover plate 2 with the axis of the gas tank 8 as the direction, and the sound wave emitters 3 are arranged in multiple groups horizontally, and the sound wave emitters 3 are electrically connected to the analog display 5. By using the number of the sound wave emitters 3 being several, and they are installed on the side walls and bottom of the water tank 1 and the bottom of the cover plate 2 with the axis of the gas tank 8 as the direction, and the sound wave emitters 3 are arranged in multiple groups horizontally, the movement path of the bubbles at the leakage point of the gas tank 8 can be easily detected, so as to facilitate the detection of the leakage point of the gas tank 8.

[0047] like Figure 7 As shown, the lower end of the fixed rod 6033 is inclined, the clamping block 6034 is made of elastic material, and the marking pen 6035 is an oil-based marker. The lower end of the fixed rod 6033 is inclined, which can facilitate the circular rotation of the marking pen 6035. The clamping block 6034 is made of elastic material, which can clamp the marking pen 6035. The marking pen 6035 is an oil-based marker, which can prevent the mark from being dissolved by water.

[0048] like Figure 6As shown, the number of connecting rods 60213 and the number of pulling rods 60214 are both four, and they are evenly distributed on the side of the synchronization plate 60212 away from the dual-axis cylinder 60211. By having the number of connecting rods 60213 and the number of pulling rods 60214 be four and they are evenly distributed on the side of the synchronization plate 60212 away from the dual-axis cylinder 60211, the effect of improving the movement stability of the moving limit assembly 6022 can be achieved.

[0049] The method for using the closed airflow detection device based on internal pressure increase comprises the following steps:

[0050] S1. When a leak occurs at the top of the welding part of the gas tank 8, the central controller 4 transmits the elastic waves of the multiple sound wave transmitters 3 to the gas tank 8 in the direction of the axis of the gas tank 8. When bubbles appear at the leak point of the gas tank 8, the multiple corresponding sound wave transmitters 3 continuously transmit the irregular fracture path signal of the bubbles at the leak point under the water pressure to the calculation module, and the calculation module simulates the bubble path of the leak point of the gas tank 8, thereby simulating the leakage direction of the gas tank 8, and the central controller 4 controls the marking mechanism 603 to mark the leak point;

[0051] S2. When leakage occurs at the bottom or side of the gas tank 8, the simulation display 5 controls the driving wheel 7 through the central controller 4 to rotate the gas tank 8, and the acoustic wave transmitter 3 again emits elastic waves toward the axis of the gas tank 8 for measurement. When it is measured again that the bubbles at the leakage point of the gas tank 8 present an irregular fracture path under the water pressure, the rupture direction of the gas tank 8 is simulated again through the calculation module, and when the driving wheel 7 is controlled to move to a position that is easy to mark, the marking mechanism 603 is used to mark.

[0052] Brief description of the use process: The sound wave transmitter 3 is installed on the side wall and bottom of the water tank 1 and the bottom of the cover plate 2 with the axis of the gas tank 8 as the direction, and the sound wave transmitter 3 is arranged in multiple groups horizontally, and then the gas tank 8 is placed in the water tank 1, and the high-pressure gas is filled into the gas tank 8, and then the positioning mechanism 602 is used to locate the detection position of the gas tank 8, and then the cover plate 2 is closed on the upper part of the water tank 1, and the gas tank 8 is detected. When a leak point appears on the top of the welding part of the gas tank 8, the central controller 4 detects the leak according to multiple The elastic wave of the sound wave transmitter 3 propagates to the air tank 8 in the direction of the axis of the air tank 8. When bubbles appear at the leakage point of the air tank 8, the bubbles will move toward the water surface due to the action of the internal air. When the sound waves emitted by the sound wave transmitter 3 measure the bubbles, the movement vibration of the bubbles can be converted into electrical signals, and the irregular fracture path signals of the bubbles at the leakage point under the water pressure are continuously transmitted to the calculation module by multiple corresponding sound wave transmitters 3. The calculation module simulates the bubble path at the leakage point of the air tank 8. Thus, the leakage direction of the gas tank 8 is simulated and displayed by the simulation display 5. The leakage point of the gas tank 8 is marked by the marking mechanism 603. If there is leakage at the bottom or side of the gas tank 8, the simulation display 5 controls the driving wheel 7 through the central controller 4 to rotate the gas tank 8, and the acoustic wave transmitter 3 again emits elastic waves to the gas tank 8 in an axial manner for measurement. When the water bubble at the leakage point of the gas tank 8 is measured again to be an irregular fracture path in the water pressure, the rupture direction of the gas tank 8 is simulated again by the calculation module. When the leakage point of the gas tank 8 is moved by the driving wheel 7 to a position that is easy to mark, the calculation module controls the marking mechanism 603 to mark it. Subsequently, the gas tank 8 is gradually comprehensively detected for leakage points by repeating the above steps until all the leakage points of the gas tank 8 are detected. After the detection is completed, the gas in the gas tank 8 is released to a safe air pressure range, and the positioning mechanism 602 is released to release the positioning work of the gas tank 8. Finally, the gas tank 8 is taken out of the water tank 1 for the treatment process of the leakage point.

[0053] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed. However, as long as they are within the scope of the claims of the present invention, they are protected by the patent law.

Claims

1. A closed airflow detection device based on internal pressure increase, comprising a water tank (1), a cover plate (2), a sound wave transmitter (3), a central controller (4) and an analog display (5), characterized in that: The cover plate (2) is slidably connected to the top of the water tank (1); the sound wave transmitter (3) is arranged at the bottom of the inner wall of the water tank (1) and at both sides and the bottom of the cover plate (2); the analog display (5) and the central controller (4) are both arranged at the front side of the water tank (1); the inside of the water tank (1) is bolted with a detection structure (6); the detection structure (6) comprises a holding mechanism (601); the top of the inside of the holding mechanism (601) is rotatably connected to a driving wheel (7); the top of the driving wheel (7) is rotatably in contact with a gas tank (8); the surface of the holding mechanism (601) is rotatably connected to a positioning mechanism (602); the positioning mechanism (602 is in rotatable contact with the gas tank (8); the top of the positioning mechanism (602) is bolted with a marking mechanism (603); the marking mechanism (603) is used in conjunction with the gas tank (8); The holding mechanism (601) comprises two support plates (6011), one side of the support plates (6011) close to the inner wall of the water tank (1) is bolted to the water tank (1), both sides between the two support plates (6011) on opposite sides are bolted with support rods (6012), the surface of the support rod (6012) is sleeved with two connecting plates (6013), a support box (6014) is bolted between the opposite sides of the two connecting plates (6013) on the front and rear sides, the driving wheel (7) is rotatably connected to the top of the support box (6014), and the positioning mechanism (602) is rotatably connected to the surface of the support rod (6012); The positioning mechanism (602) includes a moving component (6021) and two limiting components (6022), the moving component (6021) includes a double-axis cylinder (60211), the double-axis cylinder (60211) is bolted to the inside of the support box (6014), both sides of the double-axis cylinder (60211) extend to both sides of the support box (6014) and are bolted to a synchronization plate (60212), the side of the synchronization plate (60212) away from the support box (6014) is bolted to a connecting rod (60213), the inside of the connecting rod (60213) is rotatably connected to a pulling rod (60214), and the pulling rod (60214) is rotatably connected to the limiting component (6022); The limit assembly (6022) comprises two rotating sleeves (60221), the rotating sleeves (60221) are rotatably connected to the support rod (6012), a limit rod (60222) is welded to the top of the rotating sleeve (60221), the limit rod (60222) is in rotational contact with the surface of the gas storage tank (8), a pull rod (60223) is welded on the side of the rotating sleeve (60221) away from the support rod (6012), the pull rod (60223) is rotatably connected to the pulling rod (60214), and the limit rod (60222) is bolted to the marking mechanism (603); The marking mechanism (603) comprises a mounting block (6031), wherein the mounting block (6031) is bolted to two right-side limit rods (60222), wherein the mounting block (6031) is internally rotatably connected to a lifting shaft (6032), wherein a fixing rod (6033) is bolted to the bottom of the lifting shaft (6032), wherein two clamping blocks (6034) are welded to the front side of the fixing rod (6033), wherein a marking pen (6035) is clamped between opposite sides of the two clamping blocks (6034), and wherein the marking pen (6035) is used in conjunction with the gas storage tank (8).

2. The device for detecting airflow in a closed environment based on internal pressure increase according to claim 1, characterized in that: The top of the support box (6014) is provided with an arc-shaped groove, and the driving wheel (7) is rotatably connected in the arc-shaped groove. There are a plurality of driving wheels (7) which are evenly distributed on the front and rear sides of the arc-shaped groove.

3. The device for detecting airflow in a closed environment based on internal pressure increase according to claim 1, characterized in that: The number of the sound wave transmitters (3) is several, and they are installed on the side walls and bottom of the water tank (1) and the bottom of the cover plate (2) with the axis of the gas storage tank (8) as the direction, and the sound wave transmitters (3) are arranged in multiple groups horizontally, and the sound wave transmitters (3) are electrically connected to the analog display (5).

4. The device for detecting airflow in a closed environment based on internal pressure increase according to claim 1, characterized in that: The lower end of the fixing rod (6033) is inclined, the clamping block (6034) is made of elastic material, and the marking pen (6035) is an oil-based marker.

5. The device for detecting airflow in a closed environment based on internal pressure increase according to claim 1, characterized in that: The number of the connecting rods (60213) and the pulling rods (60214) is four each, and they are evenly distributed on the side of the synchronization plate (60212) away from the dual-axis cylinder (60211).

6. A method for using a closed airflow detection device based on internal pressure increase, characterized in that: The following steps are involved: S1. When a leak occurs at the top of the welding part of the gas tank (8), the central controller (4) transmits the elastic waves of the multiple sound wave transmitters (3) in the direction of the axis of the gas tank (8) to the gas tank (8). When bubbles appear at the leak point of the gas tank (8), the multiple corresponding sound wave transmitters (3) continuously transmit the irregular fracture path signal of the bubbles at the leak point under water pressure to the calculation module in the central controller (4). The calculation module simulates the bubble path appearing at the leak point of the gas tank (8), thereby simulating the leakage direction of the gas tank (8). The central controller (4) controls the marking mechanism (603) to mark the leak point. S2. When leakage occurs at the bottom or side of the gas tank (8), the analog display (5) controls the driving wheel (7) through the central controller (4) to rotate the gas tank (8), and the acoustic wave transmitter (3) again emits elastic waves toward the axis of the gas tank (8) for measurement. When the water bubble at the leakage point of the gas tank (8) is measured again to have an irregular fracture path under water pressure, the rupture direction of the gas tank (8) is simulated again through the calculation module. When the driving wheel (7) is controlled to move to a position that is easy to mark, the marking mechanism (603) is used to mark.

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