Device and method for detecting air tightness of polyurethane foam joint mixture storage tank

Abstract

The invention relates to the technical field of air tightness detection of chemical agent storage tank bodies, and discloses an air tightness detection device and method for a polyurethane foam caulking agent storage tank body, the air tightness detection device comprises a placing assembly, the placing assembly comprises a fixing frame, a rotating disc is arranged above the fixing frame, and the rotating disc is arranged above the fixing frame. A lifting sliding rail is arranged on one side of the fixing frame, a clamping assembly and a pneumatic plugging assembly are arranged on one side of the lifting sliding rail, an adjusting assembly is arranged below the pneumatic plugging assembly, a containing frame is arranged on the surface of the rotary disc, and an elastic detection assembly is arranged on one side of the containing frame. Through cooperative work of the rotating disc, the lifting sliding rail, the clamping assembly, the pneumatic plugging assembly and the adjusting assembly, accurate clamping, positioning and detection of the storage tank are achieved, the stability and reliability of the detection process are ensured, manual operation is reduced, the automatic detection process is achieved, and the detection efficiency is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of airtightness detection of chemical agent storage tanks, and specifically relates to an airtightness detection device and method for a storage tank of polyurethane foam sealant. Background Art

[0002] Polyurethane sealant is a product of the cross - combination of aerosol technology and polyurethane foam technology. It is a special polyurethane product that fills components such as polyurethane prepolymer, foaming agent, and catalyst in a pressure - resistant aerosol can. It has excellent properties such as bonding, waterproofing, heat expansion and contraction resistance, heat insulation, sound insulation, and even flame retardancy (for flame - retardant types only). It can be used for sealing and plugging, filling gaps, fixing and bonding, and thermal insulation and sound insulation. It is especially suitable for sealing and plugging and waterproofing between plastic - steel or aluminum alloy doors and windows and walls. Since polyurethane foam sealant has certain storage risks and is explosive, finished polyurethane foam sealant is usually stored, transported, and retailed in metal storage tanks. However, since storage tanks are generally produced by molds, if the material distribution is uneven during the production process, some positions of the storage tank will be weak or have pores. If the airtightness is not detected, it will cause leakage of polyurethane foam sealant during use, thus leading to safety problems.

[0003] Chinese Patent with application number 2021220908274 discloses an airtightness detection device for a storage tank of polyurethane foam sealant, including a support plate. A bearing plate is arranged at the middle position on the front side of the support plate. A water - containing tank is arranged below the bearing plate. An inflation device is arranged above the bearing plate on the front side of the support plate. The inflation device includes a movable plate and an inflation cone. The inflation cone includes a cone shell, a gas needle, an inflation pipe, a sealing capsule, and a ventilation pipe. This device realizes the efficient airtightness detection of polyurethane foam sealant storage tanks through an automatically connected inflation detection device and a lifting water tank, in cooperation with a production line or manual operation. However, this detection method is prone to errors, resulting in inaccurate detection results.

[0004] Based on the above - mentioned scheme, when detecting the airtightness of a storage tank of polyurethane foam sealant, generally, air is introduced into the interior of the storage tank, and the storage tank is immersed in water. Whether the storage tank generates bubbles is observed to judge its airtightness. However, this method has inaccurate detection results and cannot quickly judge and record which position of the storage tank has air leakage. Since the storage tank will be deformed by external forces during production, transportation, and storage, that is, the deformation of the tank body of the storage tank and the arched structure on the storage tank will affect the airtightness detection results of the storage tank. Summary of the Invention

[0005] In view of the above problems, the present invention provides an airtightness detection device and method for a storage tank of polyurethane foam sealant to solve the problems raised in the above background art.

[0006] To achieve the above object, the present invention provides the following technical solution: An airtightness detection device for a storage tank of polyurethane foam sealant, including a placement component, the placement component includes a fixed frame, a turntable is arranged above the fixed frame, a lifting slide rail is arranged on one side of the fixed frame, a clamping component and a pneumatic plugging component are arranged on one side of the lifting slide rail, an adjusting component is arranged below the pneumatic plugging component, a placement rack is arranged on the surface of the turntable, and an elastic detection component is arranged on one side of the placement rack; The pneumatic plugging component includes a pump body, the pump body is arranged on one side of the lifting slide rail, an exhaust pipe is arranged on one side of the pump body, an air inlet pipe is arranged at the center position of the surface of the pump body, and a flow sensor is assembled on the air inlet pipe; The elastic detection component includes a detection table, the detection table is arranged on the surface of the turntable, a detection cylinder is arranged on the surface of the detection table, a distance sensor is arranged on the surface of the detection cylinder, an elastic sleeve is arranged inside the detection cylinder, a support frame is arranged at one end of the elastic sleeve away from the detection table, and an air extraction pipe is arranged on one side of the support frame.

[0007] Preferably, both ends of the support frame are provided with mounting plates, the mounting plates are fixedly arranged above the detection cylinder, a gas channel is opened inside the support frame, and the gas channel is communicated with the air extraction pipe.

[0008] Preferably, the clamping component includes a clamping frame, the clamping frame is arranged on one side of the lifting slide rail, a plurality of cylinders are arranged on the surface of the clamping frame, a clamping seat is arranged at one end of the cylinder away from the clamping frame, a spring is arranged at one end of the clamping seat away from the cylinder, a clamping plate is arranged at one end of the spring away from the clamping seat, a clamping plate is arranged below the clamping plate, and a clamping groove adapted to the clamping plate is opened at one end of the support frame away from the elastic sleeve.

[0009] Preferably, both ends of the clamping seat are provided with limit columns, the limit columns are fixedly connected to the clamping plate at one end away from the clamping seat, and limit holes are opened at the positions where the clamping seat is connected to the limit columns.

[0010] Preferably, one end of the air inlet pipe away from the pump body is provided with a ventilation hose, one end of the ventilation hose away from the air inlet pipe is provided with a connecting pipe, one end of the connecting pipe away from the ventilation hose is provided with a snap ring, and a clamping groove adapted to the snap ring is opened on the surface of the air extraction pipe; Below the exhaust pipe is provided with a charging pipe, on the surface of the charging pipe is provided a positioning plate, below the positioning plate is provided an electric push rod, and the end of the electric push rod away from the positioning plate is fixedly connected to a clamping bracket. The connecting pipe is fixedly arranged on the positioning plate and penetrates and extends below the clamping bracket.

[0011] Preferably, a sleeve is arranged inside the charging pipe. A chute is opened at the position where the charging pipe is connected to the sleeve. One end of the sleeve away from the charging pipe is provided with a clamping seat, and a plurality of clamping columns are arranged on the surface of the clamping seat. One end of the exhaust pipe away from the pump body is provided with a clamping joint, and a clamping groove adapted to the clamping column is opened at the end of the clamping joint away from the exhaust pipe.

[0012] Preferably, a sealing cover is arranged on the surface of the charging pipe. The sealing cover is arranged below the positioning plate. An annular groove is opened inside the sealing cover, and a sealing ring is arranged inside the annular groove.

[0013] Preferably, the turntable is movably arranged above the fixed frame. A limiting ring is arranged at one end of the placing frame away from the turntable. A driving motor is arranged above the lifting slide rail. One end of the output shaft of the driving motor is provided with a ball screw, and a nut seat is arranged on the surface of the ball screw. The nut seat away from the lifting slide rail is fixedly connected to the clamping bracket. One side of the pump body is provided with a bracket, and one end of the bracket away from the pump body is fixedly connected to the nut seat.

[0014] Preferably, the adjusting assembly includes a connecting frame. The connecting frame is arranged below the sealing cover. A rotating motor is arranged at the central position of the surface of the connecting frame. One end of the output shaft of the rotating motor is provided with a rotating cylinder. Hydraulic rods are arranged on both sides of the rotating cylinder. One end of the hydraulic rod away from the rotating cylinder is provided with an arc-shaped seat, and a detection ball is arranged inside the arc-shaped seat.

[0015] The present invention also provides a method for detecting the air tightness of a storage tank for polyurethane foam sealant. The specific detection method steps are as follows: S1: First, under the combined action of the placing component and the clamping component, the storage tank in the placing frame is clamped and lifted. Then, control the turntable to rotate so that the elastic detection component is located below the clamping component. Then, move the storage tank into the elastic sleeve. S2: Then, under the action of the pneumatic plugging component, the air between the storage tank and the elastic sleeve is pumped out, so that the elastic sleeve fits the surface of the storage tank. If it does not fit, it indicates that the tank mouth of the storage tank is deformed. Then, correct the tank mouth of the storage tank through the adjusting component. S3: Finally, seal the tank opening of the storage tank through the pneumatic plugging assembly, then inflate the interior of the storage tank under the action of the pneumatic plugging assembly, and finally detect and calculate the deformation amount of the elastic sleeve through the distance sensor on the detection cylinder, and judge the airtightness of the storage tank according to the deformation amount of the elastic sleeve.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. By setting up the cooperation of the detection cylinder, distance sensor, elastic sleeve and support frame, etc., the present invention realizes the purpose of detecting the airtightness of the storage tank. By monitoring the deformation amount of the elastic sleeve in real time through the distance sensor, the airtightness of the storage tank can be accurately judged, and according to the deformation amounts at different positions of the elastic sleeve, it can quickly judge and record which position of the storage tank has air leakage, improving the accuracy of the detection result.

[0017] 2. The present invention extracts the air between the elastic sleeve and the storage tank through the extraction pipe, and detects the gas flow passing through the position of the air pipe through the flow sensor, and judges whether the elastic sleeve fits tightly with the tank body of the storage tank according to the detection value of the flow sensor, thereby effectively improving the accuracy of the airtightness detection result of the storage tank.

[0018] 3. During the suction operation, the present invention can also judge whether the arched structure on the storage tank is deformed according to the detection value of the flow sensor. If the arched structure on the storage tank is deformed, the arc can be corrected through the adjustment assembly, ensuring accurate airtightness detection even when the storage tank is deformed. Description of the Drawings

[0019] Figure 1 It is a schematic diagram of the first perspective of the overall structure of the present invention; Figure 2 It is a schematic diagram of the second perspective of the overall structure of the present invention; Figure 3 It is a schematic diagram of the assembly structure of the placement component and the elastic detection component of the present invention; Figure 4 In the present invention Figure 3 Enlarged view of part A; Figure 5 It is a schematic diagram of the assembly structure of the clamping plate and the support frame of the present invention; Figure 6 It is a schematic diagram of the assembly structure of the clamping component and the pneumatic plugging component of the present invention; Figure 7 In the present invention Figure 6 Enlarged view of part B; Figure 8 In the present invention Figure 6 Enlarged view of part C; Figure 9 Schematic diagram of the assembly structure of the clamping component, pneumatic plugging component and adjusting component of the present invention; Figure 10 Schematic diagram of the adjusting component structure of the present invention.

[0020] In the figure: 1. Placing component; 101. Fixed frame; 102. Turntable; 103. Placing rack; 104. Limiting ring; 105. Lifting slide rail; 106. Ball screw; 107. Driving motor; 108. Nut seat; 2. Clamping component; 201. Clamping frame; 202. Cylinder; 203. Clamping seat; 204. Spring; 205. Clamping plate; 206. Limiting column; 207. Card plate; 3. Pneumatic plugging component; 301. Pump body; 302. Exhaust pipe; 3021. Card joint; 303. Intake pipe; 304. Ventilation hose; 305. Connecting pipe; 306. Sleeve; 3061. Card seat; 3062. Card column; 307. Inflating pipe; 308. Sealing cover; 309. Sealing ring; 310. Bracket; 311. Positioning plate; 312. Electric push rod; 4. Elastic detection component; 401. Detection table; 402. Detection cylinder; 403. Distance sensor; 404. Elastic sleeve; 405. Support frame; 406. Mounting plate; 407. Exhaust pipe; 5. Adjusting component; 501. Connecting frame; 502. Rotating motor; 503. Rotating cylinder; 504. Hydraulic rod; 505. Arc seat; 506. Detection ball. Specific embodiments

[0021] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0022] As Figures 1 to 10 shown, a hermeticity detection device for a polyurethane foam sealant storage tank of the present invention includes a placing component 1. The placing component 1 includes a fixed frame 101. A turntable 102 is arranged above the fixed frame 101. A lifting slide rail 105 is arranged on one side of the fixed frame 101. A clamping component 2 and a pneumatic plugging component 3 are arranged on one side of the lifting slide rail 105. An adjusting component 5 is arranged below the pneumatic plugging component 3. A placing rack 103 is arranged on the surface of the turntable 102. An elastic detection component 4 is arranged on one side of the placing rack 103.

[0023] As Figure 3As shown in the figure, the turntable 102 is movably arranged above the fixed frame 101. A limiting ring 104 is arranged at one end of the placing rack 103 away from the turntable 102. A driving motor 107 is arranged above the lifting slide rail 105. One end of the output shaft of the driving motor 107 is provided with a ball screw 106, and a nut seat 108 is arranged on the surface of the ball screw 106.

[0024] It should be noted that driving the turntable 102 to rotate a preset angle by a stepping motor is a prior art and will not be elaborated here.

[0025] As Figure 3 , Figure 4 shown in the figure, the elastic detection assembly 4 includes a detection table 401 arranged on the surface of the turntable 102. A detection cylinder 402 is arranged on the surface of the detection table 401. A distance sensor 403 is arranged on the surface of the detection cylinder 402. An elastic sleeve 404 is arranged inside the detection cylinder 402. One end of the elastic sleeve 404 away from the detection table 401 is provided with a support frame 405. Installation plates 406 are arranged at both ends of the support frame 405, and the installation plates 406 are fixedly arranged above the detection cylinder 402.

[0026] As Figures 5 to 7 shown in the figure, the clamping assembly 2 includes a clamping frame 201 arranged on one side of the lifting slide rail 105. A plurality of cylinders 202 are arranged on the surface of the clamping frame 201. One end of the cylinder 202 away from the clamping frame 201 is provided with a clamping seat 203. One end of the clamping seat 203 away from the cylinder 202 is provided with a spring 204. One end of the spring 204 away from the clamping seat 203 is provided with a clamping plate 205. One end of the nut seat 108 away from the lifting slide rail 105 is fixedly connected to the clamping frame 201. A clamping plate 207 is arranged below the clamping plate 205, and a groove adapted to the clamping plate 207 is formed at one end of the support frame 405 away from the elastic sleeve 404.

[0027] Limit posts 206 are arranged at both ends of the clamping seat 203. One end of the limit post 206 away from the clamping seat 203 is fixedly connected to the clamping plate 205, and a limit hole is formed at the position where the clamping seat 203 is connected to the limit post 206.

[0028] The pneumatic plugging assembly 3 includes a pump body 301. The pump body 301 is arranged on one side of the lifting slide rail 105. A bracket 310 is arranged on one side of the pump body 301. One end of the bracket 310 away from the pump body 301 is fixedly connected to the nut seat 108. An exhaust pipe 302 is arranged on one side of the pump body 301. An inflation pipe 307 is arranged below the exhaust pipe 302. A positioning plate 311 is arranged on the surface of the inflation pipe 307. An electric push rod 312 is arranged below the positioning plate 311. One end of the electric push rod 312 away from the positioning plate 311 is fixedly connected to the clamping frame 201. A sealing cover 308 is arranged on the surface of the inflation pipe 307. The sealing cover 308 is arranged below the positioning plate 311.

[0029] A gas inlet pipe 303 is arranged at the central position of the surface of the pump body 301. One end of the gas inlet pipe 303 away from the pump body 301 is provided with a ventilation hose 304. One end of the ventilation hose 304 away from the gas inlet pipe 303 is provided with a connecting pipe 305. The connecting pipe 305 is fixedly arranged on the positioning plate 311. The connecting pipe 305 penetrates and extends below the clamping frame 201.

[0030] As Figure 8 shown, a sleeve 306 is arranged inside the inflation pipe 307. A chute is opened at the position where the inflation pipe 307 is connected to the sleeve 306. One end of the sleeve 306 away from the inflation pipe 307 is provided with a clamping seat 3061. A plurality of clamping columns 3062 are arranged on the surface of the clamping seat 3061. One end of the exhaust pipe 302 away from the pump body 301 is provided with a clamping joint 3021. A clamping groove adapted to the clamping columns 3062 is opened at one end of the clamping joint 3021 away from the exhaust pipe 302.

[0031] During use, through the cooperation of the clamping columns 3062 and the clamping grooves on the clamping joint 3021, it is convenient to connect and fix between the clamping seat 3061 and the clamping joint 3021, so as to connect the exhaust pipe 302 and the inflation pipe 307, and prepare for subsequent inflation into the storage tank body.

[0032] As Figure 10 shown, an annular groove is opened inside the sealing cover 308. A sealing ring 309 is arranged inside the annular groove. Through the cooperation of the sealing cover 308 and the sealing ring 309, the tank opening of the storage tank body is sealed during the airtightness test, and gas leakage is avoided from affecting the efficiency of the airtightness test.

[0033] As Figure 9 、 Figure 10As shown in the figure, the adjusting assembly 5 includes a connecting frame 501. The connecting frame 501 is arranged below the sealing cover 308. A rotating motor 502 is arranged at the center position of the surface of the connecting frame 501. One end of the output shaft of the rotating motor 502 is provided with a rotating cylinder 503. Hydraulic rods 504 are arranged on both sides of the rotating cylinder 503. One end of the hydraulic rod 504 away from the rotating cylinder 503 is provided with an arc-shaped seat 505. A detection ball 506 is arranged inside the arc-shaped seat 505.

[0034] When detecting the air tightness of the polyurethane foam sealant storage tank, the traditional detection method generally involves ventilating the inside of the storage tank and immersing the storage tank in water. By observing whether bubbles are generated in the storage tank to judge its air tightness. However, this method has inaccurate detection results and cannot quickly judge and record which position of the storage tank has air leakage. To solve this problem, the specific operation is as follows: Move the storage tank to be detected to the inside of the placement rack 103 on the surface of the turntable 102, and then control the turntable 102 to rotate 180 degrees to transport the storage tank in the placement rack 103 below the clamping assembly 2. The turntable 102 stops rotating. Since one end of the storage tank near the tank mouth is arched and the diameter of the tank mouth is smaller than the diameter of the tank body, in order to facilitate the clamping assembly 2 to clamp the arched structure on the storage tank, first start the drive motor 107. The drive motor 107 drives the ball screw 106 to rotate together, so that the nut seat 108 moves along the lifting slide rail 105 and towards the direction close to the turntable 102, that is, the clamping frame 201 moves together with the nut seat 108. During this process, the clamping assembly 2, the pneumatic plugging assembly 3 and the adjusting assembly 5 move downward in the vertical direction together with the nut seat 108, so that the adjusting assembly 5 enters the inside of the storage tank and the adjusting assembly 5 is located at the arched structure on the storage tank. Then the controller controls the hydraulic rod 504 to extend. The hydraulic rod 504 pushes the arc seat 505 and the detection ball 506 to move towards the direction close to the arched inner wall of the tank body together, so that the detection ball 506 contacts the arched inner wall of the tank body. Since the diameter of the tank mouth is smaller than the diameter of the tank body, the detection ball 506 plays a role of positioning and supporting the arched inner wall of the tank body, so that the subsequent clamping assembly 2 does not displace when clamping the storage tank. Then the controller controls the electric push rod 312 to extend. The electric push rod 312 drives the positioning plate 311, the air charging pipe 307 and the sealing cover 308 to move away from the clamping frame 201 together, and the connecting frame 501 moves together with the sealing cover 308, that is, the adjusting assembly 5 as a whole moves together with the positioning plate 311. And because the detection ball 506 plays a role of positioning and supporting the arched inner wall of the tank body, the storage tank moves away from the clamping frame 201 together with the positioning plate 311, so that the arched structure on the storage tank extends out of the placement rack 103 and is in the clamping position. Then the controller controls the cylinder 202 to extend. The cylinder 202 pushes the clamping seat 203, the spring 204, the clamping plate 205 and the clamping plate 207 to move towards the direction close to the arched structure on the storage tank together, so that the clamping plate 205 fits with the arched structure on the storage tank. At this time, the spring 204 is in a compressed state. During this process, the length of the limit post 206 entering the limit hole on the clamping seat 203 increases, and the plurality of clamping plates 205 cooperate with each other to surround and elastically clamp the arched structure on the storage tank, so as to achieve the purpose of clamping the arched structure on the storage tank.

[0035] Then, start the drive motor 107. The drive motor 107 drives the ball screw 106 to rotate together, so that the nut seat 108 moves along the lifting slide rail 105 and in the direction away from the turntable 102. That is, the clamping frame 201 moves together with the nut seat 108. During this process, the clamping assembly 2, the pneumatic plugging assembly 3, and the adjusting assembly 5 move upward in the vertical direction together with the nut seat 108. That is, the storage tank moves upward in the vertical direction, so that the storage tank moves to the preparation position to be detected.

[0036] During the process of the storage tank moving to the preparation position to be detected, the limit ring 104 on the placement rack 103 scrapes and cleans the impurities adhering to the outer surface of the storage tank, avoiding the influence of the impurities on the outer surface of the storage tank on the subsequent airtightness test results. At the same time, in order to improve the cleaning effect and prevent the impurities from adhering to the outer surface of the storage tank again, specifically, turn on the switch of the pump body 301. Under the action of the pump body 301, the outside air sequentially enters the inside of the pump body 301 through the connecting pipe 305, the ventilation hose 304, and the air inlet pipe 303, and then the air inside the pump body 301 is discharged from the exhaust pipe 302, so as to blow the storage tank to improve the cleaning effect.

[0037] When the storage tank is in the preparation position to be detected, the controller controls the turntable 102 to rotate 180 degrees, so that the elastic detection assembly 4 is located below the storage tank. Then, move the storage tank into the elastic sleeve 404. Specifically, start the drive motor 107. The drive motor 107 drives the ball screw 106 to rotate together, so that the nut seat 108 moves along the lifting slide rail 105 together in the direction close to the turntable 102. That is, the clamping frame 201 moves together with the nut seat 108. During this process, the clamping assembly 2, the pneumatic plugging assembly 3, and the adjusting assembly 5 move downward in the vertical direction together with the nut seat 108. That is, the clamping assembly 2 drives the storage tank to move together in the direction close to the support frame 405, so that the storage tank passes through the support frame 405 and enters the elastic sleeve 404. At this time, the clamping plate 207 on the clamping plate 205 is adapted to the groove on the support frame 405.

[0038] It should be noted that during the above process, since there are multiple cylinders 202, and the multiple cylinders 202 are arranged in a ring on the clamping frame 201, and the cylinders 202 correspond to the clamping plates 205 one by one. Since the clamping plate 205 is arc-shaped, the clamping plate 205 is adapted to the arched structure on the storage tank. That is, the multiple clamping plates 205 cooperate with each other to surround the arched structure on the storage tank, and the clamping plate 207 on the clamping plate 205 is tightly engaged with the groove on the support frame 405. That is, the storage tank is surrounded by the elastic sleeve 404, the support frame 405, the multiple clamping plates 205, and the multiple clamping plates 207 to form a closed space, which is convenient for the accuracy of the subsequent test results.

[0039] Then, the pneumatic plugging component 3 is used to seal the mouth of the storage tank, and the inside of the storage tank is inflated. Finally, the airtightness of the storage tank is judged according to the detection result obtained by the elastic detection component 4. Specifically: First, the controller controls the hydraulic rod 504 to contract. The hydraulic rod 504 drives the arc seat 505 and the detection ball 506 to move together in the direction close to the rotating cylinder 503, so that the detection ball 506 moves away from the arched inner wall of the tank and returns to its initial state, without interfering with the subsequent movement of the adjusting component 5. Then, the controller controls the electric push rod 312 to extend. The electric push rod 312 drives the positioning plate 311 and the air charging pipe 307 to move together in the direction away from the clamping frame 201, so that the air charging pipe 307 drives the sleeve 306 to move together in the direction close to the exhaust pipe 302. During this process, the clamping seat 3061 on the sleeve 306 contacts and presses against the clamping head 3021 on the exhaust pipe 302, so that the clamping column 3062 on the clamping seat 3061 is clamped in the clamping groove on the clamping head 3021, realizing the connection and fixation between the clamping seat 3061 and the clamping head 3021, thus connecting the exhaust pipe 302 and the air charging pipe 307, preparing for subsequent inflation into the storage tank. Then, the controller controls the electric push rod 312 to contract. The electric push rod 312 drives the positioning plate 311 and the air charging pipe 307 to move together in the direction close to the clamping frame 201, so that the air charging pipe 307 drives the sealing cover 308 and the sealing ring 309 to move together and makes the sealing cover 308 located at the mouth of the storage tank. The cooperation of the sealing cover 308 and the sealing ring 309 realizes the purpose of sealing. During this process, the sleeve 306 will extend out of the air charging pipe 307, thereby increasing the length of the air charging pipe 307. At this time, the connection between the clamping seat 3061 and the clamping head 3021 will not be disconnected. It should be noted that during the above process, since the electric push rod 312 drives the positioning plate 311, the air charging pipe 307 and the sealing cover 308 to move together, and the connecting frame 501 moves together with the sealing cover 308, that is, the adjusting component 5 will move together with the positioning plate 311 without causing movement interference, so no more details will be described here.

[0040] Then turn on the switch of the pump body 301. Under the action of the pump body 301, the outside air enters the inside of the pump body 301 successively through the connecting pipe 305, the ventilation hose 304 and the intake pipe 303. Then the air inside the pump body 301 passes through the exhaust pipe 302, the sleeve 306 and the charging pipe 307 successively. Finally, the air inside the charging pipe 307 enters the inside of the storage tank. During this process, the deformation of the elastic sleeve 404 at this position is detected and calculated by the distance sensor 403 on the detection cylinder 402. That is, before inflation, the distance between this position and the elastic sleeve 404 is detected by the distance sensor 403, and the detection result of the distance sensor 403 at this time is represented by a preset value. During the inflation process, the distance between this position and the elastic sleeve 404 is detected in real time by the distance sensor 403, and the detection result of the distance sensor 403 at this time is represented by a detection value. Then, by calculating the difference between the detection value of the distance sensor 403 and the initial value, the deformation of the elastic sleeve 404 at this position can be obtained. The specific situation is as follows: If the difference between the detection value of the distance sensor 403 and the initial value is zero, it indicates that there is no leakage at this position of the storage tank, and the elastic sleeve 404 at this position has not deformed.

[0041] If the difference between the detection value of the distance sensor 403 and the initial value is not zero, it indicates that there is a leakage at this position of the gas storage tank, that is, the gas inside the storage tank sprays out from this position, and under the action of the gas, the elastic sleeve 404 bulges and deforms at this position.

[0042] It should be noted that multiple distance sensors 403 are provided, and the multiple distance sensors 403 are arranged in a ring on the surface of the detection cylinder 402. The deformation of different positions of the elastic sleeve 404 is detected by the distance sensors 403 at different positions, so as to judge the leakage situation of different positions of the storage tank. If the differences between the detection values of the multiple distance sensors 403 and the initial value are all zero, it indicates that the airtightness of the storage tank is good. If there is a difference between the detection value of a certain distance sensor 403 and the initial value that is not zero, it indicates that the airtightness of the storage tank is poor.

[0043] In the above process, it is found that during the production, transportation and storage of the storage tank body, deformation may occur due to external forces. That is, the deformation of the tank body of the storage tank body and the arched structure on the storage tank body will affect the test results. When the tank body of the storage tank body is deformed, it is easy to cause the tank body of the storage tank body to fit loosely with the elastic sleeve 404, resulting in an error in the detection value of the distance sensor 403. When the arched structure on the storage tank body is deformed, the clamping plate 205 on the clamping assembly 2 will fit loosely with the arched structure on the storage tank body. And at this time, if the tank body of the storage tank body leaks, part of the leaked gas will flow in the gap between the tank body of the storage tank body and the elastic sleeve 404 and be discharged from the place where the clamping plate 205 fits loosely with the arched structure on the storage tank body. The deformation amount of the elastic sleeve 404 at the leakage position will not change significantly, and the leakage condition at this position cannot be detected in time.

[0044] To solve the above problems, the airtightness detection device further includes: As Figures 4 to 6 shown, an air extraction pipe 407 is provided on one side of the support frame 405. A gas passage is opened inside the support frame 405, and the gas passage is communicated with the air extraction pipe 407. A snap ring is provided at the end of the connecting pipe 305 away from the ventilation hose 304. A card slot adapted to the snap ring is provided on the surface of the air extraction pipe 407. A flow sensor is assembled on the air inlet pipe 303.

[0045] During use, after passing the storage tank body through the support frame 405 and into the interior of the elastic sleeve 404, there may be protrusions or depressions due to the deformation of the tank body of the storage tank. To ensure that the elastic sleeve 404 fits closely with the tank body of the storage tank, specifically, first, the controller controls the hydraulic rod 504 to contract. The hydraulic rod 504 drives the arc seat 505 and the detection ball 506 to move together in the direction close to the rotating cylinder 503, so that the detection ball 506 moves away from the inner arched wall of the tank body and returns to its initial state. Then, the controller controls the electric push rod 312 to contract. The electric push rod 312 drives the positioning plate 311 and the connecting pipe 305 to move together in the direction close to the clamping frame 201. During this process, the connecting pipe 305 passes through the clamping frame 201 and contacts and presses the air extraction pipe 407, so that the snap ring on the connecting pipe 305 is clamped in the card slot on the surface of the air extraction pipe 407, realizing the connection and fixation between the connecting pipe 305 and the air extraction pipe 407. And at this time, the exhaust pipe 302 is communicated with the inflation pipe 307. Then, the air between the elastic sleeve 404 and the storage tank is extracted through the air extraction pipe 407. The specific suction operation is as follows: turn on the switch of the pump body 301. Under the action of the pump body 301, the air between the elastic sleeve 404 and the storage tank first enters the air extraction pipe 407 through the gas channel inside the support frame 405, then sequentially passes through the connecting pipe 305, the ventilation hose 304 and the air inlet pipe 303 and enters the interior of the pump body 301. Finally, the gas inside the pump body 301 is discharged from the exhaust pipe 302. Under the action of the air extraction pipe 407, the elastic sleeve 404 fits closely with the tank body of the storage tank. Since a flow sensor is installed on the air inlet pipe 303, the flow rate of the gas passing through the position of the air inlet pipe 303 can be detected in real time by the flow sensor. After the preset air extraction time, the detection value of the flow sensor is used to judge whether the elastic sleeve 404 fits closely with the tank body of the storage tank. Specifically: If the detection value of the flow sensor is zero at this time, it indicates that the elastic sleeve 404 fits closely with the tank body of the storage tank at this time. It can be concluded that the arched structure on the storage tank has not deformed, and the multiple clamping plates 205 fit closely with the arched structure on the storage tank. The clamping plates 207 on the clamping plates 205 are tightly engaged with the grooves on the support frame 405, that is, the storage tank is surrounded by the elastic sleeve 404, the support frame 405, the multiple clamping plates 205 and the multiple clamping plates 207 to form a closed space.

[0046] After the suction operation is completed, the controller controls the electric push rod 312 to extend. The electric push rod 312 drives the positioning plate 311 and the connecting pipe 305 to move away from the clamping frame 201 together. During this process, the snap ring on the connecting pipe 305 disengages from the slot on the surface of the suction pipe 407, and the connecting pipe 305 is disconnected from the suction pipe 407. It should be noted that since a one-way valve is provided inside the suction pipe 407, when the connecting pipe 305 is disconnected from the suction pipe 407, the outside air cannot enter the inside of the elastic sleeve 404 and the storage tank through the suction pipe 407 and the gas passage. Then the controller controls the electric push rod 312 to extend, so that the exhaust pipe 302 is communicated with the charging pipe 307. Subsequently, the pneumatic sealing assembly 3 seals the tank opening of the storage tank and inflates the inside of the storage tank, which will not be elaborated here. Finally, the airtightness of the storage tank is judged by calculating the difference between the detected value of the distance sensor 403 and the initial value. It should be noted that at this time, the initial value represents the detection result of the distance between this position and the elastic sleeve 404 detected by the distance sensor 403 after the suction operation. For specific details, refer to the previous text and will not be elaborated here.

[0047] If the detected value of the flow sensor is greater than zero at this time, it indicates that the elastic sleeve 404 and the tank body of the storage tank are not closely attached at this time. From this, it can be concluded that the arched structure on the storage tank is deformed. Since the clamping plate 205 at a certain position is not closely attached to the arched structure on the storage tank, that is, the compression degree of the spring 204 at this position is greater than the compression degree of the spring 204 at the fitting state position, and the length of the limit post 206 entering the limit hole on the clamping seat 203 at this position is greater than the length of the limit post 206 entering the limit hole on the clamping seat 203 at the fitting state position. As a result, the clamping plate 207 on the clamping plate 205 is misaligned with the groove on the support frame 405, that is, during the suction operation, the outside air will continuously enter between the elastic sleeve 404 and the storage tank from the gap between the clamping plate 205 and the arched structure on the storage tank and from the gap between the clamping plate 207 and the groove on the support frame 405, thus causing the air between the elastic sleeve 404 and the storage tank to be not sucked clean, and resulting in a continuous gas flow passing through the position of the intake pipe 303.

[0048] At this time, the arched structure on the deformed storage tank body needs to be corrected through the adjustment assembly 5. Specifically, first, after the suction operation is completed, the controller controls the electric push rod 312 to extend, so that the connecting pipe 305 is disconnected from the air extraction pipe 407. This will not be elaborated here. Then the controller controls the electric push rod 312 to continue to extend. The electric push rod 312 drives the positioning plate 311 and the gas charging pipe 307 to move away from the clamping bracket 201 together, so that the gas charging pipe 307 drives the sealing cover 308 and the connecting bracket 501 to move together, that is, the adjustment assembly 5 as a whole moves along with the gas charging pipe 307, so that the detection ball 506 on the adjustment assembly 5 is located at the tank opening position of the storage tank body. Then the controller controls the hydraulic rod 504 to extend. The hydraulic rod 504 pushes the arc-shaped seat 505 and the detection ball 506 to move together in the direction close to the arched inner wall of the tank body, so that the detection ball 506 contacts the arched inner wall of the tank body. At this time, the rotation motor 502 is started. The rotation motor 502 drives the rotating cylinder 503, the hydraulic rod 504, the arc-shaped seat 505 and the detection ball 506 to rotate together, so that the detection ball 506 squeezes and corrects the arched inner wall, thereby correcting the radian of the arched structure on the storage tank body at this position.

[0049] The height of the adjustment assembly 5 in the vertical direction is controlled by the electric push rod 312, that is, the height of the detection ball 506 in the vertical direction. The displacement of the detection ball 506 in the horizontal direction is controlled by the hydraulic rod 504. That is, according to the radian of the arched structure on the storage tank body, the contraction amount of the electric push rod 312 and the extension amount of the hydraulic rod 504 are adjusted respectively, so that the detection ball 506 fits the radian of the arched structure, so that the detection ball 506 squeezes and corrects the arched inner wall during the rotation process.

[0050] The present invention also provides a method for detecting the airtightness of a polyurethane foam sealant storage tank body. The specific detection method steps are as follows: S1: First, under the combined action of the placement assembly 1 and the clamping assembly 2, the storage tank body in the placement frame 103 is clamped and lifted. Then the controller controls the turntable 102 to rotate so that the elastic detection assembly 4 is located below the clamping assembly 2. Then the storage tank body is moved into the elastic sleeve 404. S2: Then, under the action of the pneumatic plugging assembly 3, the air between the storage tank body and the elastic sleeve 404 is pumped out, so that the elastic sleeve 404 fits the surface of the storage tank body. If it does not fit, it indicates that the tank opening of the storage tank body is deformed. Then the tank opening of the storage tank body is corrected through the adjustment assembly 5. S3: Finally, the tank opening of the storage tank body is sealed by the pneumatic plugging assembly 3. Then, under the action of the pneumatic plugging assembly 3, the inside of the storage tank body is inflated. Finally, the distance sensor 403 on the detection cylinder 402 is used to detect and calculate the deformation amount of the elastic sleeve 404, and the airtightness of the storage tank body is judged according to the deformation amount of the elastic sleeve 404.

[0051] It should be noted that, in this document, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variant thereof are intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements not only includes those elements but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device.

[0052] Although embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An airtightness detection device for a polyurethane foam sealant storage tank body, comprising a placement assembly (1), the placement assembly (1) includes a fixed frame (101), a turntable (102) is arranged above the fixed frame (101), and a lifting slide rail (105) is arranged on one side of the fixed frame (101), characterized in that: On one side of the lifting slide rail (105), a clamping assembly (2) and a pneumatic plugging assembly (3) are provided. Below the pneumatic plugging assembly (3), an adjusting assembly (5) is provided. On the surface of the turntable (102), a placement rack (103) is provided. On one side of the placement rack (103), an elastic detection assembly (4) is provided; The pneumatic plugging assembly (3) includes a pump body (301). The pump body (301) is arranged on one side of the lifting slide rail (105). On one side of the pump body (301), an exhaust pipe (302) is provided. At the central position on the surface of the pump body (301), an air inlet pipe (303) is provided. A flow sensor is assembled on the air inlet pipe (303); The elastic detection assembly (4) includes a detection table (401). The detection table (401) is arranged on the surface of the turntable (102). On the surface of the detection table (401), a detection cylinder (402) is provided. On the surface of the detection cylinder (402), a distance sensor (403) is provided. Inside the detection cylinder (402), an elastic sleeve (404) is provided. At one end of the elastic sleeve (404) away from the detection table (401), a support frame (405) is provided. On one side of the support frame (405), an air extraction pipe (407) is provided.

2. The airtightness detection device for the polyurethane foam sealant storage tank according to claim 1, characterized in that: At both ends of the support frame (405), mounting plates (406) are provided. The mounting plates (406) are fixedly arranged above the detection cylinder (402). Inside the support frame (405), a gas channel is opened, and the gas channel is communicated with the air extraction pipe (407).

3. The airtightness detection device for the polyurethane foam sealant storage tank according to claim 1, characterized in that: The clamping assembly (2) includes a clamping frame (201). The clamping frame (201) is arranged on one side of the lifting slide rail (105). On the surface of the clamping frame (201), a plurality of cylinders (202) are provided. At one end of the cylinder (202) away from the clamping frame (201), a clamping seat (203) is provided. At one end of the clamping seat (203) away from the cylinder (202), a spring (204) is provided. At one end of the spring (204) away from the clamping seat (203), a clamping plate (205) is provided. Below the clamping plate (205), a clamping plate (207) is provided. At one end of the support frame (405) away from the elastic sleeve (404), a groove adapted to the clamping plate (207) is opened.

4. The airtightness detection device for the polyurethane foam sealant storage tank according to claim 3, wherein: At both ends of the clamping seat (203), limit posts (206) are provided. At one end of the limit post (206) away from the clamping seat (203), it is fixedly connected to the clamping plate (205). At the position where the clamping seat (203) is connected to the limit post (206), a limit hole is opened.

5. The airtightness detection device for the polyurethane foam sealant storage tank according to claim 1, characterized in that: At one end of the air inlet pipe (303) away from the pump body (301), a ventilation hose (304) is provided. At one end of the ventilation hose (304) away from the air inlet pipe (303), a connecting pipe (305) is provided. At one end of the connecting pipe (305) away from the ventilation hose (304), a snap ring is provided. On the surface of the air extraction pipe (407), a card slot adapted to the snap ring is opened; Below the exhaust pipe (302), an inflation pipe (307) is provided. A positioning plate (311) is arranged on the surface of the inflation pipe (307). Below the positioning plate (311), an electric push rod (312) is provided. One end of the electric push rod (312) far from the positioning plate (311) is fixedly connected to a clamping frame (201). The connecting pipe (305) is fixedly arranged on the positioning plate (311), and the connecting pipe (305) penetrates and extends below the clamping frame (201).

6. The airtightness detection device for the polyurethane foam sealant storage tank according to claim 5, wherein: A sleeve (306) is arranged inside the inflation pipe (307). A chute is formed at the position where the inflation pipe (307) is connected to the sleeve (306). One end of the sleeve (306) far from the inflation pipe (307) is provided with a clamping seat (3061), and a plurality of clamping columns (3062) are arranged on the surface of the clamping seat (3061); One end of the exhaust pipe (302) far from the pump body (301) is provided with a clamping joint (3021), and a clamping groove adapted to the clamping columns (3062) is formed at one end of the clamping joint (3021) far from the exhaust pipe (302).

7. The airtightness detection device for the polyurethane foam sealant storage tank according to claim 5, characterized in that: A sealing cover (308) is arranged on the surface of the inflation pipe (307). The sealing cover (308) is arranged below the positioning plate (311). An annular groove is formed inside the sealing cover (308), and a sealing ring (309) is arranged inside the annular groove.

8. The airtightness detection device for the polyurethane foam sealant storage tank according to claim 1, wherein: The turntable (102) is movably arranged above the fixed frame (101). A limiting ring (104) is arranged at one end of the placing frame (103) far from the turntable (102). A driving motor (107) is arranged above the lifting slide rail (105). One end of the output shaft of the driving motor (107) is provided with a ball screw (106), and a nut seat (108) is arranged on the surface of the ball screw (106); One end of the nut seat (108) far from the lifting slide rail (105) is fixedly connected to the clamping frame (201). A bracket (310) is arranged on one side of the pump body (301), and one end of the bracket (310) far from the pump body (301) is fixedly connected to the nut seat (108).

9. The airtightness detection device for the storage tank of polyurethane foam sealant according to claim 1, wherein: The adjusting assembly (5) includes a connecting frame (501). The connecting frame (501) is arranged below the sealing cover (308). A rotating motor (502) is arranged at the central position of the surface of the connecting frame (501). One end of the output shaft of the rotating motor (502) is provided with a rotating cylinder (503). Hydraulic rods (504) are arranged on both sides of the rotating cylinder (503). One end of the hydraulic rod (504) far from the rotating cylinder (503) is provided with an arc-shaped seat (505), and a detection ball (506) is arranged inside the arc-shaped seat (505).

10. A method for detecting the airtightness of a storage tank for polyurethane foam sealant, which is realized by using the airtightness detection device for a storage tank for polyurethane foam sealant as described in claim 1, characterized in that: The specific detection method steps are as follows: S1: First, under the combined action of the placing assembly (1) and the clamping assembly (2), the storage tank in the placing frame (103) is clamped and lifted. Then, the turntable (102) is controlled to rotate so that the elastic detection assembly (4) is located below the clamping assembly (2). Then, the storage tank is moved into the elastic sleeve (404). S2: Then, under the action of the pneumatic plugging assembly (3), the air between the storage tank body and the elastic sleeve (404) is pumped out to make the elastic sleeve (404) fit the surface of the storage tank body. If they do not fit, it indicates that the tank mouth of the storage tank body is deformed, and then the tank mouth of the storage tank body is corrected by the adjusting assembly (5); S3: Finally, the tank mouth of the storage tank body is sealed by the pneumatic plugging assembly (3), and then the inside of the storage tank body is inflated under the action of the pneumatic plugging assembly (3). Finally, the deformation amount of the elastic sleeve (404) is detected and calculated by the distance sensor (403) on the detection cylinder (402), and the air tightness of the storage tank body is judged according to the deformation amount of the elastic sleeve (404).

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