An airtightness detection device for an energy storage chassis

Abstract

The present invention relates to the field of airtightness detection, and discloses an airtightness detection device for an energy storage chassis, which includes a detection frame body. A detection tank is installed on the detection frame body. Above the detection tank, there is a tank cover assembly. The tank cover assembly includes a horizontal support and a linear module for driving the horizontal support to move vertically. At the bottom of the horizontal support, there is a sealing cover. An air injection hole is provided through the end face of the sealing cover. At the upper hole of the air injection hole, there is an air delivery pipe. At the bottom of the sealing cover, there is a lower support seat. A number of pressure gauges are arranged in an array on the detection tank and the sealing cover. Outside the detection tank, there is a sealing ring near the tank opening. On the upper end face of the sealing ring, there is a ring groove. The vertical cross-section of the ring groove is circular. At the bottom of the sealing cover, there is a limiting ring. A ring hole is provided on the end face of the limiting ring. An airbag is arranged in the ring hole. The bottom of the airbag extends out of the ring hole. On the sealing cover, there is an air charging pipe communicated with the ring hole. The ends of the air delivery pipe and the air charging pipe are both communicated with an air compressor.

Description

Technical Field

[0001] The present invention relates to the technical field of airtightness detection, and specifically to the field of airtightness detection of energy storage cabinets. Background Art

[0002] Airtightness detection refers to the detection of the sealing performance of an object. There are mainly the pressure drop method and the water immersion method. The water immersion method uses water as the detection medium. The object is placed in water, and the sealing performance of the object is judged by whether water enters the object. This detection method easily makes the object wet, and subsequent drying is required, which is not only troublesome but also likely to damage the object. The pressure drop method uses a gas medium as the detection medium, such as air. By injecting a preset amount of air into the object and monitoring the internal air pressure of the object, the sealing performance of the object can be obtained based on the pressure change. It is not easy to damage the object, and the detection result can be clearly and intuitively obtained through technical means such as a pressure gauge. Therefore, the pressure drop method is used more widely.

[0003] After retrieval, a Chinese invention patent with publication number CN115219120A was found, which discloses a device for detecting the airtightness of an energy storage cabinet, which solves the problem that the thin wall of the cabinet is prone to deformation. However, it still has some deficiencies. For example, during airtightness detection, it seals the hole structure of the cabinet through a sealing ring and then injects a gas medium into the cabinet. This detection method can only detect the airtightness of the part of the cabinet except the hole structure. However, the cabinet is an integral whole, and the sealing performance between the components at the hole structure of the cabinet and the cabinet has not been detected, and the detection is not comprehensive enough. For example, this detection method cannot perform self-checking. If there are damages or aging problems that are not easily observable by the naked eye in components such as the sealing ring of the detection device, then the obtained detection result is inaccurate and needs to be improved.

[0004] Based on the above, the present invention proposes an airtightness detection device for an energy storage cabinet. Summary of the Invention

[0005] To solve the problems mentioned in the above background, the present invention provides an airtightness detection device for an energy storage cabinet.

[0006] To achieve the above technical objectives, the technical solutions adopted by the present invention are as follows.

[0007] An airtightness detection device for an energy storage chassis, comprising a detection frame body, on which a detection tank is installed. Above the detection tank, there is a tank cover assembly. The tank cover assembly includes a horizontal support and a linear module for driving the horizontal support to move in the vertical direction. At the bottom of the horizontal support, there is a sealing cover coaxial with the detection tank. An air injection hole is provided through the end face of the sealing cover. At the upper hole opening of the air injection hole, there is an air supply pipe. At the bottom of the sealing cover, there is a lower support seat. A number of pressure gauges are arranged in an array on the detection tank and the sealing cover to monitor the air pressure fluctuations at various parts of the detection tank after the tank opening is sealed, so as to improve the accuracy of the detection results;

[0008] An outer part of the detection tank is provided with a sealing ring near the tank opening. On the upper end face of the sealing ring, there is a ring groove. The vertical cross-section of the ring groove is circular. At the bottom of the sealing cover, a limiting ring is coaxially arranged. An annular hole is coaxially opened on the end face of the limiting ring. An airbag is arranged in the annular hole. The bottom of the airbag extends out of the annular hole. On the sealing cover, there is an air charging pipe communicated with the annular hole. The ends of the air supply pipe and the air charging pipe are both communicated with an air compressor to fill air into the detection tank and the airbag.

[0009] As a further improvement and optimization of the present invention, the annular hole is composed of an upper annular section and a lower annular section. The inner and outer diameters of the upper annular section are both larger than those of the lower annular section. The upper opening of the airbag is fixedly arranged in the upper annular section, and the bottom of the airbag passes through the lower annular section.

[0010] As a further improvement and optimization of the present invention, a framework is arranged in the airbag. The framework is connected with the upper annular section of the annular hole; initially, the airbag is deflated, and the framework is used to support the airbag internally, so that the airbag can be inserted smoothly into the ring groove of the sealing ring subsequently.

[0011] As a further improvement and optimization of the present invention, chamfers are provided on the outer side edge of the detection tank opening and on the inner side edge of the lower end face of the limiting ring. When the sealing cover moves downward, the inclined planes formed by the two chamfers can be attached to each other, which can further improve the sealing performance of the detection tank opening.

[0012] As a further improvement and optimization of the present invention, an air release hole is provided at the bottom of the ring groove; during the inflation process of the airbag, without the air release hole, it is easy for the outer surface of the airbag to first contact a part of the upper wall of the ring groove. The air in the area below the contact part cannot be discharged during the subsequent inflation of the airbag, which will affect the contact between the airbag and the wall of the ring groove, and ultimately affect the sealing performance at the airbag.

[0013] As a further improvement and optimization of the present invention, a connection bracket is provided on the sealing cover. A chassis is rotatably mounted on the connection bracket, and the rotating shaft formed at the rotatable mounting location is arranged vertically. The rotating shaft is driven to rotate by a deflection motor provided on the connection bracket. A vertically arranged inner core shaft is mounted at the bottom of the chassis. The inner core shaft is driven to rotate by a drive motor provided on the chassis. The interior of the inner core shaft is hollow, and a connection pipe is provided at the upper opening through a rotary joint. The end of the connection pipe is connected to a negative pressure pump;

[0014] A cleaning ball in the shape of a sphere with a number of inlet and outlet holes arrayed on its outer surface is also mounted on the chassis. The lower opening of the inner core shaft is located inside the cleaning ball. A connecting shaft extends from the upper opening of the cleaning ball, and the connecting shaft is coaxially connected to the inner core shaft. The cleaning ball is made of an elastic material;

[0015] A rotating fan is mounted on the chassis above the cleaning ball. The rotating fan is coaxially connected to the inner core shaft.

[0016] The deflection motor can drive the chassis to rotate, and the linear module can drive the cleaning assembly to move downward. The two cooperate to insert the cleaning ball made of elastic material into the annular groove. The outer surface of the cleaning ball fits against the groove wall of the annular groove. The rotating fan 406 contacts the upper end surface of the sealing ring. Then, the rotating motor drives the detection tank to rotate, and the drive motor drives the inner core shaft to rotate. The inner core shaft drives the cleaning ball and the rotating fan to rotate together. The air inside the cleaning ball is sucked by the negative pressure source. In this way, the upper end surface of the sealing ring is cleaned by the rotating fan, the groove wall and the bottom of the annular groove are wiped by the cleaning ball. At the same time, the dirt wiped off is sucked into the inner core shaft by negative pressure and finally discharged through the connection pipe to achieve the cleaning purpose.

[0017] As a further improvement and optimization of the present invention, a connection seat is provided on the detection frame body. A flushing tank arranged vertically is provided on the connection seat. A waste liquid pipe is provided at the bottom of the flushing tank. An inner partition extends downward from the pipe orifice of the flushing tank. The inner partition is in the shape of a frustum of a cone with a diameter decreasing from bottom to top. A number of downwardly inclined spray holes are evenly spaced on the inner partition. The bottom of the inner partition is connected to the tank wall of the flushing tank. The area above the inner partition in the flushing tank is named the spraying area. A flushing hole communicating with the spraying area is provided on the connection seat. A water pipe is connected to the orifice of the flushing hole, and a water pump is provided at the end of the water pipe.

[0018] After the cleaning assembly completes the cleaning of the sealing ring, the cleaning ball can be pulled into the flushing tank through the cooperation of the linear module and the deflection motor. Then, the water pump drives the flushing medium to rush towards the cleaning ball through the spray holes, and at the same time, the drive motor drives the cleaning ball to rotate. In this way, the cleaning of the cleaning ball is realized, avoiding dirt adhering to the cleaning ball and affecting the next cleaning effect of the cleaning ball.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0020] In this solution, the mouth of the detection tank is sealed by a sealing cover. By injecting a preset amount of air into the detection tank, it is judged whether the airtightness of the detection tank is qualified or whether the airtightness of the energy storage chassis located in the detection tank is qualified according to the fluctuation of the pressure gauge within a preset time, so as to realize the airtightness detection of the energy storage chassis. This detection method will not only cause damage to the energy storage chassis, but also the detection result is more accurate. On this basis:

[0021] 1. The sealing mechanism arranged between the sealing cover and the detection tank adopts a double-sealing method: the inclined surface of the limit ring fits and seals with the inclined surface of the detection tank + the airbag fits and seals with the wall of the ring groove. The sealing effect is better, and the fitting area between the airbag and the wall of the ring groove is larger, so the sealing effect is also better. Further, an air vent hole is opened at the bottom of the ring groove. During the inflation process of the airbag, without the air vent hole, it is easy for the outer surface of the airbag to first fit with the upper part of the wall of the ring groove, and the air in the area below the fitting part cannot be discharged during the subsequent inflation of the airbag, which will affect the contact between the airbag and the wall of the ring groove and ultimately affect the airtightness at the airbag, that is, the setting of the air vent hole can increase the sealing performance between the airbag and the ring groove;

[0022] 2. Through the cooperation of the cleaning component and the flushing component, the cleaning of the ring groove can be realized, preventing the seal from being affected by the dirt in the ring groove. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic structure of the present invention Figure 1 ;

[0024] Figure 2 is a schematic structure of the present invention Figure 2 ;

[0025] Figure 3 is a schematic structure of the present invention Figure 3 ;

[0026] Figure 4 is a schematic diagram of the detection tank and the sealing ring;

[0027] Figure 5 is a schematic diagram of the tank cover assembly;

[0028] Figure 6 is a partial cross-sectional view of the airbag and the sealing cover;

[0029] Figure 7 is a partial cross-sectional view when the airbag seals the sealing ring;

[0030] Figure 8 is a schematic diagram of the cleaning component;

[0031] Figure 9 is a cross-sectional view of the flushing component.

[0032] The reference numerals in the drawings are as follows:

[0033] 100, detection frame; 101, linear module; 200, detection tank; 201, sealing ring; 300, tank cover assembly; 301, horizontal support; 302, sealing cover; 303, lower support seat; 304, air supply pipe; 305, limiting ring; 306, airbag; 307, skeleton; 308, inflation pipe; 400, cleaning assembly; 401, connecting bracket; 402, chassis; 403, deflection motor; 404, driving motor; 405, inner core shaft; 406, rotating fan; 407, cleaning ball; 408, connecting pipe; 500, flushing assembly; 501, connecting seat; 502, flushing tank; 503, inner partition; 504, waste liquid pipe; 505, flushing hole. Detailed implementation manners

[0034] To further elaborate on the technical means and effects adopted by the present invention to achieve the intended invention purpose, the following, in conjunction with the drawings and preferred embodiments, details the specific implementation manners, structures, features and their effects of the present invention as follows.

[0035] In the drawings of this solution, a refers to the chassis whose airtightness is to be detected.

[0036] Embodiment 1

[0037] Referring to Figures 1 - 9 , an airtightness detection device for an energy storage chassis, including a detection frame 100. A vertically arranged detection tank 200 is installed on the detection frame 100. A tank cover assembly 300 is arranged above the detection tank 200, wherein:

[0038] A number of pressure gauges are evenly arranged in an array on the detection tank 200 and the tank cover assembly 300, and are used to monitor the air pressure fluctuations of each part of the detection tank 200 after the tank opening is sealed, so as to improve the accuracy of the detection results;

[0039] A sealing mechanism is arranged between the tank cover assembly 300 and the detection tank 200 for sealing connection between the two.

[0040] Referring to Figure 4 and Figure 5 , the tank cover assembly 300 includes a horizontal support 301 and a linear module 101 for driving the horizontal support 301 to move in the vertical direction. A sealing cover 302 coaxial with the detection tank 200 is arranged at the bottom of the horizontal support 301. An air injection hole is penetrated through the end face of the sealing cover 302. An air supply pipe 304 is arranged at the upper hole of the air injection hole. The end of the air supply pipe 304 is communicated with a gas medium, such as communicated with an air compressor, an air pump, etc., and a gas medium is injected into the detection tank 200 whose tank opening is sealed by the sealing cover 302 through the air supply pipe 304.

[0041] A lower support base 303 is provided at the bottom of the sealing cover 302, and the lower support base 303 is used to support the energy storage chassis.

[0042] Referring to Figure 4 and Figure 7 , the sealing mechanism includes a sealing ring 201 coaxially arranged outside the detection tank 200 and close to the tank opening. A ring groove is provided on the upper end surface of the sealing ring 201, and the vertical section of the ring groove is circular.

[0043] Referring to Figure 6 and Figure 7 , the sealing mechanism further includes a limit ring 305 coaxially arranged at the bottom of the sealing cover 302. A ring hole is coaxially opened on the end surface of the limit ring 305. The ring hole is composed of an upper ring section and a lower ring section. The inner and outer diameters of the upper ring section are both larger than those of the lower ring section.

[0044] An airbag 306 is arranged in the ring hole. Specifically, the upper opening of the airbag 306 is fixedly arranged in the upper ring section, and the bottom of the airbag 306 passes through the lower ring section. A sealing hole is opened on the sealing cover 302, and an inflation tube 308 extends at the upper orifice of the sealing hole. The end of the inflation tube 308 is also connected to a gas medium, such as being connected to an air compressor, an air pump, etc. The sealing hole is communicated with the ring hole. By injecting a gas medium into the ring hole, the airbag 306 can be inflated.

[0045] Preferably, a skeleton 307 is arranged in the airbag 306, and the skeleton 307 is connected to the upper ring section of the ring hole. The significance is that initially, the airbag 306 is deflated, and the skeleton 307 provides internal support for the airbag 306, so that the airbag 306 can be smoothly inserted into the ring groove of the sealing ring 201 subsequently.

[0046] Preferably, referring to Figure 7 , the edge of the outside of the tank opening of the detection tank 200 is chamfered, and the edge of the inner side of the lower end surface of the limit ring 305 is also chamfered. When the sealing cover 302 moves downward, the inclined surfaces formed by the two chamfers can be attached. The significance is to further improve the sealing performance.

[0047] Working principle of Embodiment 1:

[0048] Process of closing or opening the tank opening of the detection tank 200:

[0049] The linear module 101 drives the horizontal support 301 to move downward, so that the airbag 306 is inserted into the ring groove, and the inclined surface on the limit ring 305 is attached to the inclined surface on the detection tank 200. Then, the gas medium enters the airbag 306 through the inflation tube 308, causing the airbag 306 to expand, and the outer surface of the airbag 306 is closely attached to the groove wall of the ring groove, as Figure 7As shown, at this time, there are two seals between the detection tank 200 and the sealing cover 302: the inclined surface fitting part and the airbag 306. The double-sealing effect is better, and the fitting area between the airbag 306 and the wall of the annular groove is larger, so the sealing effect is also better. In a preferred embodiment, refer to Figure 7 , an air vent hole is provided at the bottom of the annular groove. The significance is that during the expansion process of the airbag 306, without the air vent hole, it is easy for the outer surface of the airbag 306 to first fit with the upper part of the wall of the annular groove, and the air in the area below the fitting part cannot be discharged during the subsequent expansion of the airbag 306, which will affect the contact between the airbag 306 and the wall of the annular groove, and ultimately affect the airtightness at the airbag 306.

[0050] Air tightness detection process of the energy storage chassis:

[0051] First, the tank cover assembly 300 seals the tank opening of the detection tank 200, and then injects a preset amount of gas medium into the detection tank 200 through the air supply pipe 304. Wait for a preset time, observe the fluctuation of the pressure gauge, and determine whether the detection environment is qualified. Only when it is qualified can the air tightness detection of the energy storage chassis be carried out;

[0052] Open the tank opening, place the energy storage chassis on the lower supporting seat 303, and then seal the tank opening again. At this time, the energy storage chassis is located inside the detection tank 200, and then inject a preset amount of gas medium into the detection tank 200. Wait for a preset time. If the air tightness of the chassis is unqualified, then the gas medium in the detection tank 200 will enter the chassis under the drive of the pressure difference, resulting in the fluctuation of the pressure gauge. If the air tightness of the chassis is qualified, then the gas medium in the detection tank 200 will not enter the chassis, and the fluctuation of the pressure gauge is within the preset range, thus realizing the air tightness detection of the chassis.

[0053] Embodiment Two

[0054] In Embodiment One, the annular groove is exposed. After being placed for a long time, dirt is likely to exist in the annular groove. Therefore, it is necessary to clean the annular groove regularly. Based on this, Embodiment Two is proposed.

[0055] Refer to Figures 1 - 3 , the device further includes a cleaning component 400 and a flushing component 500. The former is used to clean the annular groove, and the latter is used to flush the former.

[0056] Refer to Figure 8, the cleaning assembly 400 includes a connecting bracket 401 connected to the sealing cover 302. A chassis 402 is rotatably mounted on the connecting bracket 401, and the rotating shaft formed at the rotatable mounting position is arranged vertically and is driven to rotate by a deflection motor 403 provided on the connecting bracket 401. A vertical inner core shaft 405 is mounted at the bottom of the chassis 402, and the inner core shaft 405 is driven to rotate by a driving motor 404 provided on the chassis 402. The inside of the inner core shaft 405 is hollow, and a connecting pipe 408 is provided at the upper opening through a rotary joint. The end of the connecting pipe 408 is provided with a negative pressure source, such as a negative pressure pump, a blower, etc., which can suck air from the connecting pipe 408.

[0057] A cleaning ball 407 in the shape of a sphere with a plurality of inlet and outlet holes arrayed on its outer surface is also mounted on the chassis 402. The lower opening of the inner core shaft 405 is located inside the cleaning ball 407. A connecting shaft extends from the upper opening of the cleaning ball 407, and the connecting shaft is coaxially connected to the inner core shaft 405. The cleaning ball 407 is made of an elastic material, such as elastic plastic. Further, the cleaning ball 407 is composed of a plurality of elastic strips arrayed in the circumferential direction, and the gap between two adjacent elastic sheets is the inlet and outlet hole.

[0058] A rotating fan 406 located above the cleaning ball 407 is also mounted on the chassis 402, and the rotating fan 406 is coaxially connected to the inner core shaft 405.

[0059] The working process of the cleaning assembly 400 is as follows:

[0060] The deflection motor 403 can drive the chassis 402 to rotate, and the linear module 101 can drive the cleaning assembly 400 to move downward. The two cooperate to insert the cleaning ball 407 made of elastic material into the annular groove. The outer surface of the cleaning ball 407 fits against the groove wall of the annular groove, and the rotating fan 406 contacts the upper end surface of the sealing ring 201.

[0061] Then, the detection tank 200 is rotated by a rotating motor provided on the detection frame 100, the inner core shaft 405 is driven to rotate by the driving motor 404, the inner core shaft 405 drives the cleaning ball 407 and the rotating fan 406 to rotate together, and the air inside the cleaning ball 407 is sucked by the negative pressure source. In this way, the upper end surface of the sealing ring 201 is cleaned by the rotating fan 406, the groove wall and the groove bottom of the annular groove are wiped by the cleaning ball 407. At the same time, the wiped dirt is sucked into the inner core shaft 405 by negative pressure and finally discharged through the connecting pipe 408, which is similar to the existing vacuum cleaner technology and will not be elaborated.

[0062] After the cleaning is completed, the linear module 101 drives the cleaning component 400 to move upward and leave the annular groove. Then, the deflection motor 403 drives the chassis 402 to rotate, so that the cleaning component 400 is away from the sealing cover 302 and does not interfere with the subsequent airtightness detection.

[0063] Referring to Figure 9 , the flushing component 500 includes a connecting seat 501 connected to the detection frame 100. A vertically arranged flushing tank 502 is provided on the connecting seat 501. A waste liquid pipe 504 is provided at the bottom of the flushing tank 502. An inner partition 503 extends downward from the nozzle of the flushing tank 502. The inner partition 503 is in the shape of a frustum of a cone with a diameter decreasing from bottom to top. A number of downwardly inclined spray holes are evenly spaced on the inner partition 503. The bottom of the inner partition 503 is connected to the tank wall of the flushing tank 502. The area of the flushing tank 502 above the inner partition 503 is named the spraying area. A flushing hole 505 communicating with the spraying area is provided on the connecting seat 501. The flushing hole 505 and the water pump are connected through a water pipe (the water pump and the water pipe are not shown in the figure). After the cleaning component 400 completes the cleaning of the sealing ring 201, the cleaning ball 407 can be pulled into the flushing tank 502 through the cooperation of the linear module 101 and the deflection motor 403. Then, the water pump drives the flushing medium (such as water) to rush towards the cleaning ball 407 through the spray holes. At the same time, the driving motor 404 drives the cleaning ball 407 to rotate, so as to realize the flushing of the cleaning ball 407 and avoid dirt adhering to the cleaning ball 407 and affecting the next cleaning effect of the cleaning ball 407.

[0064] The above is only a preferred embodiment of the present invention and does not impose any form of limitation on the present invention. Although the present invention has been disclosed above with the preferred embodiment, it is not intended to limit the present invention. Any person skilled in the art can make some changes or modifications to the above-disclosed technical content to obtain equivalent embodiments with equivalent changes, but as long as the technical content of the present invention is not departed from, any brief modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. An airtightness detection device for an energy storage chassis, comprising a detection frame body (100), characterized in that, A detection frame body (100) is equipped with a detection tank (200). Above the detection tank (200), there is a tank cover assembly (300). The tank cover assembly (300) includes a horizontal support (301) and a linear module (101) used to drive the horizontal support (301) to move in the vertical direction. At the bottom of the horizontal support (301), there is a sealing cover (302) coaxial with the detection tank (200). An air injection hole is penetrated through the end face of the sealing cover (302). An air delivery pipe (304) is arranged at the upper hole opening of the air injection hole. At the bottom of the sealing cover (302), there is a lower support seat (303). A number of pressure gauges are arranged in an array on the detection tank (200) and the sealing cover (302). Outside the detection tank (200), there is a sealing ring (201) near the tank opening. On the upper end face of the sealing ring (201), there is a ring groove. The vertical cross-section of the ring groove is circular. At the bottom of the sealing cover (302), a limiting ring (305) is coaxially arranged. An annular hole is coaxially opened on the end face of the limiting ring (305). An airbag (306) is arranged in the annular hole. The bottom of the airbag (306) extends out of the annular hole. On the sealing cover (302), there is an air filling pipe (308) communicated with the annular hole. The ends of the air delivery pipe (304) and the air filling pipe (308) are both connected to an air compressor. The edge of the outside of the tank opening of the detection tank (200) is chamfered, and the edge of the inner side of the lower end face of the limiting ring (305) is chamfered. When the sealing cover (302) moves downwards, the inclined planes formed by the two chamfers can be attached to each other. On the sealing cover (302), there is a connecting bracket (401). A bottom bracket (402) is rotatably installed on the connecting bracket (401), and the rotating shaft formed at the rotating installation position is arranged vertically. The rotating shaft is driven to rotate by a deflection motor (403) arranged on the connecting bracket (401). At the bottom of the bottom bracket (402), a vertically arranged inner core shaft (405) is installed. The inner core shaft (405) is driven to rotate by a driving motor (404) arranged on the bottom bracket (402). The inside of the inner core shaft (405) is hollow, and a connecting pipe (408) is arranged at the upper opening through a rotary joint. The end of the connecting pipe (408) is connected to a negative pressure pump. On the bottom bracket (402), there is also a cleaning ball (407) in a spherical shape, and a number of inlet and outlet holes are arranged on the outer surface in an array. The lower opening of the inner core shaft (405) is located inside the cleaning ball (407). A connecting shaft extends from the upper opening of the cleaning ball (407), and the connecting shaft is coaxially connected to the inner core shaft (405). The cleaning ball (407) is made of an elastic material.

2. The airtightness detection device for an energy storage chassis according to claim 1, characterized in that, The annular hole is composed of an upper ring section and a lower ring section. The inner and outer diameters of the upper ring section are both larger than those of the lower ring section. The upper opening of the airbag (306) is fixedly arranged inside the upper ring section, and the bottom of the airbag (306) passes through the lower ring section.

3. The airtightness detection device for an energy storage chassis according to claim 1, characterized in that, A framework (307) is arranged inside the airbag (306), and the framework (307) is connected to the upper ring section of the annular hole.

4. The airtightness detection device for an energy storage chassis according to claim 1, characterized in that, An air release hole is opened at the bottom of the ring groove.

5. The airtightness detection device for an energy storage chassis according to claim 1, wherein, On the bottom bracket (402), there is a rotating fan (406) located above the cleaning ball (407), and the rotating fan (406) is coaxially connected to the inner core shaft (405).

6. The airtightness detection device for an energy storage chassis according to claim 1, characterized in that, A connection base (501) is provided on the detection frame body (100). A vertically arranged flushing tank (502) is provided on the connection base (501). A waste liquid pipe (504) is provided at the bottom of the flushing tank (502). An inner partition plate (503) extends downward from the pipe orifice of the flushing tank (502). The inner partition plate (503) is in the shape of a frustum of a cone with a diameter decreasing from bottom to top. A number of downward-inclined spray holes are evenly spaced on the inner partition plate (503). The bottom of the inner partition plate (503) is connected to the tank wall of the flushing tank (502). The area of the flushing tank (502) above the inner partition plate (503) is named the spraying area. A flushing hole (505) communicating with the spraying area is provided on the connection base (501). A water pipe is connected to the orifice of the flushing hole (505), and a water pump is provided at the end of the water pipe.

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