An airtightness acoustic-optical detection device

Abstract

This invention discloses an airtightness acoustic-optical detection device, comprising a device housing, auxiliary mechanisms, separation mechanisms, filtering mechanisms, a control panel, and an alarm light. The control panel sets a pressure holding time T. When the pressure in the pipeline system reaches the required level, the solenoid valve closes, and the time T1 is recorded. An electronic barometer inside the pressure chamber continuously senses pressure changes in the pipeline system. When the pressure in the pipeline system falls below the required level, the time T2 is immediately recorded, and the actual pressure holding time (T2-T1) is calculated. The actual pressure holding time (T2-T1) is compared with the pressure holding time T, and the alarm light indicates whether the test is successful or unsuccessful. When time T has elapsed since T1, i.e., the actual pressure holding time is greater than the pressure holding time T, the alarm light illuminates green to indicate success. This device, through its control panel, can automatically stop the pressure testing after the pipeline system is pressurized, and can automatically determine whether the pressure holding time is successful and provide timely prompts, thus improving testing efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of detection devices, and particularly to an airtightness acoustic-optic detection device. Background Art

[0002] The subway air braking system is a core component to ensure the safe and reliable operation of subway trains. It realizes the smooth deceleration and timely stopping of trains by precisely controlling the flow of compressed air, meeting the requirements of frequent starts and stops and high-density operation of subways. Therefore, in order to ensure the reliable and stable operation of the air braking, it is necessary to control and detect the airtightness of the entire braking pipeline system during the production and assembly of subway vehicles to ensure the perfect sealing of the braking system. According to the technical requirements of the subway vehicle production and assembly in the industry, the underframe pipeline needs to undergo an airtightness test after assembly to detect the airtight performance between the pipeline, pipe joints, and braking equipment. The existing test method is to externally connect an airtight test trolley after the pipeline system is assembled, inflate the pipeline system to a stable pressure of (9.0 ± 0.20) bar, then cut off the air source, start timing, and calculate whether the pressure drop exceeds 0.10 bar based on the initial pressure value and the pressure value after 30 minutes; if it does not exceed, it is qualified. If it exceeds, it is unqualified, then use a leak detector to find the leak in the pipeline and repair it, and then re-conduct the pressure holding test until it is qualified.

[0003] During the pressure holding test, the worker needs to keep watching the pressure gauge during the inflation process of the airtight trolley until the pressure rises to (9.0 ± 0.20) bar and then manually cut off the air source. The pressure holding test period is 30 minutes. Generally, after inflation, the worker will perform other processes, and then check the reading of the pressure gauge after 30 minutes. If it is unqualified, leak detection and repair are required. However, in the actual operation process, we will find that in some cases, the air pressure leakage may exceed the allowable range within a dozen minutes or a few minutes after inflation. In this case, if we still wait until 30 minutes later to check the pressure gauge reading, it will cause a large amount of waiting time. The existing airtight detection trolley has a poor degree of intelligence, and the inflation and detection process will take a lot of time for employees, which is not conducive to assembly line operation and is not conducive to improving the detection efficiency. Summary of the Invention

[0004] The purpose of the present invention is to provide an airtightness acoustic-optic detection device to solve the technical problems in the prior art that the existing airtight detection trolley has a poor degree of intelligence, the inflation and detection process takes a lot of time for employees, is not conducive to assembly line operation, and is not conducive to improving the detection efficiency.

[0005] The technical problems to be solved by the present invention can be achieved through the following technical solutions:

[0006] An airtightness acoustic-optic detection device includes:

[0007] The auxiliary mechanism has a purification chamber inside the outer shell. The upper end of the purification chamber has an opening through the outer shell. An oil collecting ring is provided at the lower end of the outer shell. A supporting circular plate is rotatably mounted on the bottom surface of the outer shell. A drive motor is provided on the outer shell to drive the supporting circular plate to rotate. Diverter pipe 1 and diverter pipe 2 are embedded and fixedly connected through the side walls of the outer shell and the oil collecting ring. One end of diverter pipe 1 and diverter pipe 2 are both located at the side end of the supporting circular plate. The other end of diverter pipe 1 and diverter pipe 2 are both located on the outside of the outer shell and connected to connecting pipe 2.

[0008] The separation mechanism includes an upper fixed ring and a lower fixed ring, which are arranged in parallel. Separation blades are evenly distributed and fixedly connected in a ring between the upper and lower fixed rings. The separation mechanism is set on a supporting circular plate, and one end of each of the two diversion pipes is located below the lower fixed ring.

[0009] The filtration mechanism includes a cover plate located at the opening of the outer shell of the mechanism housing. A filter chamber is fixedly connected to the lower end face of the cover plate. A filter cavity is provided inside the filter chamber. A drying layer and an activated carbon layer are respectively provided inside the filter cavity. A negative pressure pump is embedded through and fixedly connected to the cover plate. The air inlet of the negative pressure pump is located inside the filter cavity. A connecting pipe is connected to the air outlet of the negative pressure pump. An air outlet pipe is provided at the other end of the connecting pipe. A pressure chamber is provided between the connecting pipe and the air outlet pipe. A pressure chamber is provided inside the pressure chamber. An electronic barometer is fixedly connected to the inner wall of the pressure chamber.

[0010] The device housing has an auxiliary mechanism located inside it. An air compressor is fixedly connected inside the housing. The air compressor outlet is connected to a connecting pipe. A connecting pipe is installed on the air compressor inlet. One end of the connecting pipe is connected to the air compressor inlet, and the other end of the connecting pipe passes through the housing and is located on the outside of the housing. A solenoid valve is fixedly installed on the connecting pipe.

[0011] As a further embodiment of the present invention: symmetrically distributed and fixedly connected to the opening edge of the outer shell are mating ends one; symmetrically distributed and fixedly connected to the lower end face of the mechanism cover are mating ends two corresponding to mating ends one; threaded holes are provided on mating ends one; a connecting through hole one is provided through mating ends two; a connecting bolt one is threadedly connected between mating ends one and mating ends two; the connecting bolt one is threadedly connected through the connecting through hole one on mating ends two and the threaded hole on mating ends one.

[0012] As a further embodiment of the present invention: a drive motor is embedded and fixedly connected to the bottom surface of the outer shell of the mechanism. A drive shaft is fixedly connected to the drive end of the drive motor. The drive shaft is coaxially fixedly connected to the bottom surface of the supporting circular plate. A fixing post is fixedly connected to the middle of the upper surface of the supporting circular plate. A threaded connection hole is opened on the upper surface of the fixing post. Sleeve posts are evenly distributed in a ring on the side end of the fixing post. The sleeve posts are fixedly connected to the supporting circular plate.

[0013] As a further embodiment of the present invention: a sleeve ring is coaxially sleeved in both the upper and lower fixing rings, and a connecting plate is fixedly connected between the sleeve ring and the inner end face of the upper and lower fixing rings. The sleeve ring end face is evenly distributed in a ring and has sleeve holes that penetrate through it. The sleeve posts are respectively sleeved in the sleeve holes, the fixing posts are sleeved in the sleeve rings, the lower fixing ring is set on the supporting circular plate, and the upper end face of the sleeve ring in the upper fixing ring is flush with the upper end face of the fixing post.

[0014] As a further embodiment of the present invention: a limiting fixing plate is provided on the end face of the sleeve ring inside the upper fixing ring and the fixing post. A connecting through hole two is provided through the limiting fixing plate. A connecting threaded bolt two is provided between the limiting fixing plate and the fixing post. The connecting threaded bolt two passes through the connecting through hole two on the limiting fixing plate and is threadedly connected to the threaded connecting hole on the fixing post.

[0015] As a further embodiment of the present invention: two drying layers and one activated carbon layer are respectively provided in the filter chamber. The two drying layers are respectively provided on the upper and lower sides of the activated carbon layer. The lower end of the pressure chamber is connected to the mechanism connecting pipe, and the upper end of the pressure chamber is connected to the air outlet pipe. A barometer is fixedly installed on the mechanism connecting pipe. An air inlet is opened on the bottom surface of the filter chamber and is connected to the inside of the mechanism shell.

[0016] As a further aspect of the present invention: a control panel and an alarm light are fixedly connected to the outer casing of the device, and the solenoid valve, the alarm light and the electronic barometer are electrically connected to the control panel.

[0017] As a further aspect of the present invention, a number of oil collecting racks are evenly distributed and fixedly connected on the inner end face of the oil collecting ring.

[0018] The beneficial effects of this invention are:

[0019] 1. This invention allows for the manual setting of the pressure holding time T via a control panel. When the pressure in the pipeline system reaches the required level, the control panel closes the solenoid valve on the connecting pipe and records the time T1. Simultaneously, the electronic barometer inside the pressure chamber continuously monitors pressure changes in the pipeline system. When the pressure in the pipeline system falls below the required level, the time T2 is immediately recorded, and the actual pressure holding time (T2-T1) is calculated. The actual pressure holding time (T2-T1) is compared with the qualified pressure holding time T. If (T2-T1) is less than T, an alarm is triggered. If the light turns red and an alarm sounds immediately, and (T2-T1) is greater than or equal to T, the alarm light turns green to indicate that the test is passed. When time T has elapsed since T1, i.e., the actual pressure holding time is greater than the qualified pressure holding time T, and the air pressure in the pipeline system is still at a normal level, the green light will directly indicate that the test is passed. This device can automatically stop the pressure holding after the pipeline system is pressured by setting a control panel. At the same time, it can automatically judge whether the pressure holding time is qualified and give corresponding prompts in a timely manner, which improves the automation level of the device, helps to improve the testing efficiency, and is convenient for staff to use.

[0020] 2. In use, the connecting pipe of the air compressor is connected to the workshop air tank, and the pipeline system is connected to the outlet pipe. Compressed air is delivered to the outer shell of the mechanism through the air compressor and connecting pipe two. The compressed air is then diverted into the outer shell of the mechanism through the first and second diversion pipes connected to the second connecting pipe. The diversion by the first and second diversion pipes makes the distribution of compressed air in the outer shell of the mechanism more uniform, making it easier for the compressed air to enter the separation mechanism for separation and purification. At the same time, it helps to improve the purification effect of the separation mechanism on the compressed air. The negative pressure pump is then started. Simultaneously, the negative pressure air is drawn upwards, and the drive motor is started to drive the separation mechanism to rotate. The separation blades of the separation mechanism can throw the oil and gas and other large-particle impurities in the compressed air to the periphery inside the mechanism housing. Several oil collecting racks are evenly distributed and fixedly connected in a ring on the inner end face of the oil collecting ring. The oil collecting racks on the oil collecting ring help to increase the adhesion area of ​​oil and gas, making it easier to collect oil and gas. When grease is attached to the oil collecting racks on the oil collecting ring, it helps to adhere and stick large-particle impurities, preventing the compressed air from disturbing back and forth in the mechanism housing and affecting the impurity removal effect. Attached Figure Description

[0021] The invention will now be further described with reference to the accompanying drawings.

[0022] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0023] Figure 2 This is a three-dimensional structural schematic diagram of the present invention;

[0024] Figure 3 This is a schematic diagram of the internal structure of the present invention;

[0025] Figure 4 This is a schematic diagram of the three-dimensional structure of the auxiliary mechanism of the present invention. Figure 1 ;

[0026] Figure 5 This is a schematic diagram of the three-dimensional structure of the auxiliary mechanism of the present invention. Figure 2 ;

[0027] Figure 6 This is a schematic diagram of the connection relationship between the auxiliary mechanism and the filtration mechanism of the present invention;

[0028] Figure 7 This is a schematic diagram of the connection relationship between the auxiliary mechanism and the separation mechanism of the present invention;

[0029] Figure 8 This is a three-dimensional structural diagram of the separation mechanism of the present invention;

[0030] Figure 9 This is a three-dimensional structural diagram of the separation mechanism of the present invention;

[0031] Figure 10 This is the present invention. Figure 2 Enlarged structural diagram at point A in the middle;

[0032] Figure 11 This is the present invention. Figure 4 Enlarged structural diagram at point B.

[0033] In the diagram: 1. Device housing; 2. Auxiliary mechanism; 21. Mechanism housing; 22. Connecting end one; 23. Diverter pipe one; 24. Diverter pipe two; 25. Connecting pipe one; 26. Connecting pipe two; 27. Mounting bracket; 28. Drive motor; 29. ​​Oil collecting ring; 210. Supporting circular plate; 211. Sleeve post; 212. Fixing post; 213. Threaded connection hole; 3. Separation mechanism; 31. Sleeve ring; 32. Sleeve hole; 33. Connecting plate 34. Upper fixing ring; 35. Lower fixing ring; 36. Separating blade; 4. Filter mechanism; 41. Mechanism cover plate; 42. Connecting end two; 43. Negative pressure pump; 44. Filter chamber; 45. Air inlet; 46. Filter cavity; 47. Drying layer; 48. Activated carbon layer; 49. Connecting pipe; 410. Barometer; 411. Pressure chamber; 412. Air outlet pipe; 5. Air compressor; 6. Casters; 7. Control panel; 8. Alarm light. Detailed Implementation

[0034] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0035] like Figures 1-10 As shown, an airtightness acoustic-optical detection device includes:

[0036] Auxiliary mechanism 2 has a purification chamber inside the outer shell 21. The upper end of the purification chamber has an opening through the outer shell 21. An oil collecting ring 29 is provided at the lower end of the outer shell 21. A supporting circular plate 210 is rotatably mounted on the bottom surface of the outer shell 21. A drive motor 28 is provided on the outer shell 21 to drive the supporting circular plate 210 to rotate. A diversion pipe 1 23 and a diversion pipe 24 are embedded and fixedly connected through the side walls of the outer shell 21 and the oil collecting ring 29. One end of the diversion pipe 1 23 and the diversion pipe 24 are both located at the side end of the supporting circular plate 210. The other end of the diversion pipe 1 23 and the diversion pipe 24 are both located on the outside of the outer shell 21 and connected to the connecting pipe 26.

[0037] The separation mechanism 3 includes an upper fixed ring 34 and a lower fixed ring 35. The upper fixed ring 34 and the lower fixed ring 35 are arranged in parallel. Separation blades 36 are evenly distributed and fixedly connected in a ring between the upper fixed ring 34 and the lower fixed ring 35. The separation mechanism 3 is set on the supporting circular plate 210. One end of the first diversion pipe 23 and the second diversion pipe 24 are both located below the lower fixed ring 35.

[0038] The filter mechanism 4 includes a mechanism cover plate 41, which is located at the opening of the outer shell 21. A filter chamber 44 is fixedly connected to the lower end face of the mechanism cover plate 41. A filter chamber 46 is opened in the filter chamber 44. A drying layer 47 and an activated carbon layer 48 are respectively arranged in the filter chamber 46. A negative pressure pump 43 is embedded and fixedly connected through the mechanism cover plate 41. The air inlet of the negative pressure pump 43 is located in the filter chamber 46. A mechanism connecting pipe 49 is connected to the air outlet of the negative pressure pump 43. An air outlet pipe 412 is provided at the other end of the mechanism connecting pipe 49. A pressure chamber 411 is provided between the mechanism connecting pipe 49 and the air outlet pipe 412.

[0039] The lower half of the auxiliary mechanism 2 is located inside the outer casing 1. An air compressor 5 is fixedly connected inside the outer casing 1. The air outlet of the air compressor 5 is connected to the connecting pipe 26. A connecting pipe is provided on the air inlet of the air compressor 5. One end of the connecting pipe is connected to the air inlet of the air compressor 5, and the other end of the connecting pipe passes through the outer casing 1 and is located on the outside of the outer casing 1. A solenoid valve is fixedly installed on the connecting pipe 49 of the mechanism.

[0040] The outer shell opening has symmetrically distributed and fixedly connected mating ends 22. The mechanism cover plate 41 has symmetrically distributed and fixedly connected mating ends 42 corresponding to mating ends 22. The mating ends 22 have threaded holes, and the mating ends 42 have through holes 1. A connecting bolt 1 is threaded between the mating ends 22 and the mating ends 42. The connecting bolt 1 passes through the through holes 1 on the mating ends 22 and is threadedly connected to the threaded holes on the mating ends 22.

[0041] The drive motor 28 is embedded and fixedly connected to the bottom surface of the housing 21 of the mechanism. A drive shaft is fixedly connected to the drive end of the drive motor 28. The drive shaft is coaxially fixedly connected to the bottom surface of the supporting circular plate 210. A fixing post 212 is fixedly connected to the middle of the upper end surface of the supporting circular plate 210. A threaded connection hole 213 is opened on the upper end surface of the fixing post 212. Sleeve posts 211 are evenly distributed in a ring on the side end of the fixing post 212. The sleeve posts 211 are fixedly connected to the supporting circular plate 210. There are four sleeve posts 211.

[0042] Both the upper fixing ring 34 and the lower fixing ring 35 are coaxially fitted with connecting rings 31. A connecting plate 33 is fixedly connected between the connecting ring 31 and the inner end face of the upper fixing ring 34 and the lower fixing ring 35. The end face of the connecting ring 31 is evenly distributed in a ring and has four connecting holes 32. Connecting posts 211 are fitted into the connecting holes 32 respectively, and fixing posts 212 are fitted into the connecting ring 31. The lower fixing ring 35 is set on the supporting circular plate 210. The upper end face of the connecting ring 31 in the upper fixing ring 34 is flush with the upper end face of the fixing post 212.

[0043] A limiting fixing plate is provided on the end face of the sleeve ring 31 and the fixing post 212 inside the upper fixing ring 34. A connecting through hole 2 is provided on the limiting fixing plate. A connecting threaded bolt 2 is provided between the limiting fixing plate and the fixing post 212. The connecting threaded bolt 2 passes through the connecting through hole 2 on the limiting fixing plate and is threadedly connected to the threaded connecting hole 213 on the fixing post 212. The limiting fixing plate facilitates the disassembly and assembly of the separation mechanism 3 and is beneficial to the maintenance and cleaning of the separation mechanism 3.

[0044] The filter chamber 46 is provided with two drying layers 47 and one activated carbon layer 48. The two drying layers 47 are respectively located on the upper and lower sides of the activated carbon layer 48. The lower end of the pressure chamber 411 is connected to the mechanism connecting pipe 49, and the upper end of the pressure chamber 411 is connected to the air outlet pipe 412. The pressure chamber 411 is provided with a pressure chamber. An electronic barometer is fixedly connected to the inner wall of the pressure chamber. A barometer 410 is fixedly installed on the mechanism connecting pipe 49. The bottom surface of the filter chamber 44 is provided with an air inlet 45, which is connected to the inside of the mechanism shell 21.

[0045] A control panel 7 and an alarm light 8 are fixedly connected to the outer casing 1 of the device. The solenoid valve, the alarm light 8 and the electronic barometer are electrically connected to the control panel 7.

[0046] In some specific implementation schemes, a number of oil collecting racks are evenly distributed and fixedly connected on the inner end face of the oil collecting ring 29.

[0047] In some specific implementations, casters 6 are symmetrically distributed and fixedly connected to the bottom surface of the device housing 1 near the four corners.

[0048] Two diversion pipes 24 are provided, and the two diversion pipes 24 are respectively located on both sides of the supporting circular plate 210. Each of the two diversion pipes 24 and the connecting pipe 26 is connected by a connecting pipe 25. The two diversion pipes 24 are connected to the connecting pipe 26 through the connecting pipe 25.

[0049] In some specific implementations, a mounting bracket 27 is fixedly connected to the bottom surface of the housing 21, and the mounting bracket 27 is fixedly connected to the bottom surface of the housing 1.

[0050] To facilitate understanding of the embodiments of this solution by those skilled in the art, the working principle of this solution will now be briefly explained in conjunction with specific application scenarios:

[0051] In use, connect the connecting pipe of the air compressor 5 to the workshop air tank, and then connect the pipeline system to the outlet pipe 412. Compressed air is delivered to the housing 21 of the mechanism through the air compressor 5 and the connecting pipe 26. The compressed air is then diverted into the housing 21 of the mechanism by the diversion pipes 23 and 24, which are connected to the connecting pipe 26. The diversion by the diversion pipes 23 and 24 makes the distribution of compressed air in the housing 21 of the mechanism more uniform, making it easier for the compressed air to enter the separation mechanism 3 for separation and purification. At the same time, it helps to improve the purification effect of the separation mechanism 3 on the compressed air. Start the negative pressure pump. The machine 43 draws negative pressure air upwards and simultaneously starts the drive motor 28 to drive the separation mechanism 3 to rotate. The separation blades 36 of the separation mechanism 3 can throw the oil and gas and other large-particle impurities in the compressed air to the periphery inside the mechanism housing 21. Several oil collecting racks are evenly distributed and fixedly connected in a ring on the inner end face of the oil collecting ring 29. By setting oil collecting racks on the oil collecting ring 29, it is beneficial to increase the adhesion area of ​​oil and gas, which is convenient for collecting oil and gas. When grease is attached to the oil collecting racks on the oil collecting ring 29, it is beneficial for the adhesion and sticking of large-particle impurities, preventing the compressed air from disturbing back and forth in the mechanism housing 21 and affecting the impurity removal effect.

[0052] First, the pressure holding time T is manually set via control panel 7. When the pressure in the pipeline system reaches the required level, control panel 7 closes the solenoid valve on the connecting pipe 49 and records the time T1. The electronic barometer in pressure chamber 411 can constantly sense the pressure changes in the pipeline system. When the pressure in the pipeline system is lower than the required level, the time T2 is immediately recorded, and the actual pressure holding time (T2-T1) is calculated. The actual pressure holding time (T2-T1) is compared with the pressure holding time T. If (T2-T1) is less than T, the alarm light 8 lights up red and an alarm is triggered immediately. If (T2-T1) is greater than or equal to T, the alarm light 8 lights up green, indicating that the pressure holding time has passed. This device can automatically stop the pressure holding after the pipeline system is pressured by setting control panel 7. At the same time, it can automatically judge whether the pressure holding time is qualified and give corresponding prompts in a timely manner, which improves the automation level of the device, helps to improve the testing efficiency, and is convenient for operators to use.

[0053] The foregoing has described several embodiments of the present invention in detail, but these embodiments are not limited thereto and should not be considered as limiting the scope of the invention. All equivalent variations and improvements made within the scope of the claims of this invention should still fall within the patent coverage of this invention.

Claims

1. An airtightness acoustic-optical detection device, characterized in that, include: The auxiliary mechanism (2) has a purification chamber inside the outer shell (21). The upper end of the purification chamber passes through the outer shell (21) and has an opening. An oil collecting ring (29) is provided at the lower end of the outer shell (21). A supporting circular plate (210) is rotatably provided on the bottom surface of the outer shell (21). A drive motor (28) for driving the supporting circular plate (210) to rotate is provided on the outer shell (21). A diversion pipe one (23) and a diversion pipe two (24) are embedded and fixedly connected through the side walls of the outer shell (21) and the oil collecting ring (29). One end of the diversion pipe one (23) and the diversion pipe two (24) are both located at the side end of the supporting circular plate (210). The other end of the diversion pipe one (23) and the diversion pipe two (24) are both located on the outside of the outer shell (21) and connected to the connecting pipe two (26). The separation mechanism (3) includes an upper fixed ring (34) and a lower fixed ring (35). The upper fixed ring (34) and the lower fixed ring (35) are arranged in parallel. Separation blades (36) are evenly distributed and fixedly connected in a ring between the upper fixed ring (34) and the lower fixed ring (35). The separation mechanism (3) is set on the supporting circular plate (210). One end of the first diversion pipe (23) and the second diversion pipe (24) are both set below the lower fixed ring (35). The filtration mechanism (4) includes a mechanism cover plate (41), which is located at the opening of the outer shell (21) of the mechanism housing. A filter chamber (44) is fixedly connected to the lower end face of the mechanism cover plate (41). A filter chamber (46) is provided inside the filter chamber (44). A drying layer (47) and an activated carbon layer (48) are respectively provided in the filter chamber (46). A negative pressure pump is embedded and fixedly connected to the mechanism cover plate (41). 43) The air inlet of the negative pressure pump (43) is located in the filter chamber (46). The air outlet of the negative pressure pump (43) is connected to the mechanism connecting pipe (49). The other end of the mechanism connecting pipe (49) is provided with an air outlet pipe (412). A pressure chamber (411) is provided between the mechanism connecting pipe (49) and the air outlet pipe (412). A pressure chamber is opened in the pressure chamber (411). An electronic barometer is fixedly connected to the inner wall of the pressure chamber. The lower half of the auxiliary mechanism (2) is located inside the outer shell (1) of the device. An air compressor (5) is fixedly connected inside the outer shell (1). The air outlet of the air compressor (5) is connected to the connecting pipe (26). A connecting pipe is provided on the air inlet of the air compressor (5). One end of the connecting pipe is connected to the air inlet of the air compressor (5). The other end of the connecting pipe passes through the outer shell (1) and is located on the outside of the outer shell (1). A solenoid valve is fixedly installed on the connecting pipe (49) of the mechanism.

2. The airtightness acoustic-optical detection device according to claim 1, characterized in that, The opening edge of the outer shell is symmetrically distributed and fixedly connected with a first docking end (22). The lower end face of the mechanism cover plate (41) is symmetrically distributed and fixedly connected with a second docking end (42) corresponding to the first docking end (22). The first docking end (22) has a threaded hole, and the second docking end (42) has a through connecting hole. The first docking end (22) and the second docking end (42) are threadedly connected with a connecting bolt. The connecting bolt passes through the through connecting hole on the second docking end (42) and is threadedly connected to the threaded hole on the first docking end (22).

3. The airtightness acoustic-optical detection device according to claim 1, characterized in that, The drive motor (28) is embedded and fixedly connected to the bottom surface of the outer shell (21) of the mechanism. The drive shaft is fixedly connected to the drive end of the drive motor (28). The drive shaft is coaxially fixedly connected to the bottom surface of the supporting circular plate (210). A fixing post (212) is fixedly connected to the middle of the upper end surface of the supporting circular plate (210). A threaded connection hole (213) is opened on the upper end surface of the fixing post (212). Sleeve posts (211) are evenly distributed in a ring on the side end of the fixing post (212). The sleeve posts (211) are fixedly connected to the supporting circular plate (210).

4. The airtightness acoustic-optical detection device according to claim 3, characterized in that, A connecting ring (31) is coaxially fitted inside the upper fixing ring (34) and the lower fixing ring (35). A connecting plate (33) is fixedly connected between the connecting ring (31) and the inner end face of the upper fixing ring (34) and the lower fixing ring (35). A connecting hole (32) is evenly distributed and penetrated on the end face of the connecting ring (31). A connecting post (211) is fitted inside the connecting hole (32). A fixing post (212) is fitted inside the connecting ring (31). The lower fixing ring (35) is set on the supporting circular plate (210). The upper end face of the connecting ring (31) inside the upper fixing ring (34) is flush with the upper end face of the fixing post (212).

5. The airtightness acoustic-optical detection device according to claim 4, characterized in that, A limiting fixing plate is provided on the end face of the sleeve ring (31) inside the upper fixing ring (34) and the fixing post (212). A connecting through hole 2 is provided on the limiting fixing plate. A connecting threaded bolt 2 is provided between the limiting fixing plate and the fixing post (212). The connecting threaded bolt 2 passes through the connecting through hole 2 on the limiting fixing plate and is threadedly connected to the threaded connecting hole (213) on the fixing post (212).

6. The airtightness acoustic-optical detection device according to claim 1, characterized in that, The filter chamber (46) is provided with two drying layers (47) and one activated carbon layer (48). The two drying layers (47) are respectively located on the upper and lower sides of the activated carbon layer (48). The lower end of the pressure chamber (411) is connected to the mechanism connecting pipe (49), and the upper end of the pressure chamber (411) is connected to the air outlet pipe (412). The pressure chamber (411) is provided with a pressure chamber. An electronic barometer is fixedly connected to the inner wall of the pressure chamber. A barometer (410) is fixedly installed on the mechanism connecting pipe (49). The bottom surface of the filter chamber (44) is provided with an air inlet (45), which is connected to the inside of the mechanism shell (21).

7. The airtightness acoustic-optical detection device according to claim 6, characterized in that, A control panel (7) and an alarm light (8) are fixedly connected to the outer casing (1) of the device. The solenoid valve, the alarm light (8) and the electronic barometer are electrically connected to the control panel (7).

8. The airtightness acoustic-optical detection device according to claim 1, characterized in that, Several oil collecting racks are evenly distributed and fixedly connected on the inner end face of the oil collecting ring (29).

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