PE storage tank simulation detection equipment

Abstract

The present application relates to the field of tank detection, especially to a PE tank simulation detection equipment. It comprises a fixing frame, an electric guide rail installed on the fixing frame, and a moving frame fixed on the sliding block of the electric guide rail. The present application realizes: by inflating the air bag, a closed space with a volume much smaller than the tank volume is formed between the first fixed ring and the second fixed ring, that is, the detection cavity, then the worker only needs to inject corrosive liquid into the detection cavity, and drive the moving frame, the first fixed ring, the second fixed ring, the air bag and the corrosive liquid in the detection cavity as a whole along the tank body axis by the electric guide rail, to realize the sequential coverage of different areas of the tank body inner wall, without completely filling the corrosive liquid in the whole tank body, so that the corrosive liquid can fully and completely contact with the tank body, greatly reducing the sealing and corrosion resistance detection time cost, and improving the detection efficiency.

Description

Technical Field

[0001] This invention relates to the field of storage tank testing, and more particularly to a PE storage tank simulation testing device. Background Technology

[0002] PE storage tanks are storage containers made of polyethylene. They are characterized by strong corrosion resistance, good sealing, light weight, and easy cleaning. They are widely used in chemical, environmental protection, pharmaceutical, food, and agricultural industries, and are mostly used to store corrosive liquids. Therefore, during the production process of PE storage tanks, it is necessary to test their sealing and corrosion resistance.

[0003] Currently, the mainstream technical solution for testing the sealing and corrosion resistance of PE storage tanks in the industry is still the traditional liquid filling test method. This method involves completely filling the PE storage tank to be tested with a specific liquid and observing whether there is leakage, wetness on the tank surface, and pressurizing the liquid inside the tank to check for corrosion or cracking. However, in practical applications, especially for large-volume PE storage tanks, the traditional liquid filling test method requires a long time for filling and draining the liquid. The entire testing process is extremely time-consuming, resulting in low testing efficiency and high consumption of corrosive liquids. Furthermore, if the tank ruptures during the testing process, the corrosive liquid will leak, which, if not handled properly, can easily cause environmental pollution or personnel safety accidents. Summary of the Invention

[0004] To overcome the shortcomings of existing technologies that use liquid filling detection methods to inspect tanks, such as high time cost, low detection efficiency, high consumption, and the potential for environmental pollution or personnel safety accidents if corrosive liquids leak, this invention provides a PE storage tank simulation detection device.

[0005] Technical Solution: A PE storage tank simulation testing device includes a fixed frame; an electric guide rail is mounted on the fixed frame; a movable frame is fixedly connected to the slider of the electric guide rail; it also includes a first electric push rod and a fixed shaft connected to the movable frame; a connector is fixedly connected to the lower side of the fixed shaft; a first fixed ring and a second fixed ring are fixedly connected to the connector; the first fixed ring is located above the second fixed ring; a testing chamber is formed between the first fixed ring and the second fixed ring; an exhaust hole is opened on the upper side of the first fixed ring, and a solenoid valve is installed in the exhaust hole; an air bladder is fixedly connected to the outer ring surface of both the first and second fixed rings, and the air bladder is annular; a sealing ring is slidably connected to the first fixed ring; two first electric push rods are fixedly connected to the first fixed ring; each first electric push rod is fixedly connected to the sealing ring; several air inlet pipes are connected to the movable frame; two branch pipes are connected to each air inlet pipe; each branch pipe communicates with a corresponding air bladder; a pressurizing component for conveying liquid into the testing chamber is connected to the movable frame; a collection component for collecting leaked liquid is connected to the movable frame.

[0006] To further explain, the pressurization assembly includes several first nozzles connected to the connector; a connecting pipe is provided inside the fixed shaft; a second nozzle is fixedly connected to the lower side of the connector; each first nozzle and second nozzle is connected to the connecting pipe, and each first nozzle and second nozzle is provided with an electric valve.

[0007] Further explanation: The collection assembly includes mounting brackets fixed to a movable frame; each mounting bracket is fixedly equipped with a second electric push rod; each second electric push rod is jointly fixedly equipped with a collection ring; a first collection chamber is formed on the side of the collection ring near the tank body; a first detection tube is fixedly equipped on the collection ring; the first detection tube communicates with the first collection chamber; a base plate is placed directly below the fixed shaft; a second collection chamber is formed on the base plate; a second detection tube is fixedly equipped on the front side of the base plate; the second detection tube communicates with the second collection chamber; and flow sensors are fixedly equipped on both the first and second detection tubes.

[0008] To further explain, it also includes a rubber block connected to the sealing ring.

[0009] To further clarify, the airbag is made of nitrile rubber.

[0010] To further explain, a rubber pad is provided on the contact surface between the collection ring and the tank.

[0011] To further explain, it also includes a press-fit cap; the press-fit cap is fixedly attached to the underside of both mounting brackets.

[0012] Further explanation: It also includes a sleeve and a drive assembly connected to the first fixed ring for rotating the sleeve; several sleeves are connected to the drive assembly; each sleeve is slidably connected to a sliding rod, and each sliding rod is fixedly connected to the sleeve with a spring; each sleeve is fixedly connected to a displacement sensor; the displacement sensor is in contact with the sliding rod.

[0013] To further explain, the drive assembly includes a rotating ring connected to the first fixed ring; a driven gear is fixedly connected to the upper side of the rotating ring; a motor is fixedly connected to the upper side of the first fixed ring; a driving gear is fixedly connected to the output end of the motor; the driving gear meshes with the driven gear; a plurality of third electric push rods are fixedly connected to the rotating ring; the telescopic end of each third electric push rod is fixedly connected to the corresponding sleeve.

[0014] To further explain, it also includes a rotating sleeve connected to the sliding rod; each rotating sleeve is connected to several spiral blades; and each sliding rod is fixedly connected to a scraper on the side facing the inner wall of the tank.

[0015] The beneficial effects of this invention are as follows: by inflating the airbag, a sealed space with a volume much smaller than that of the tank is formed between the first and second fixing rings, namely the detection chamber. Then, the worker only needs to inject corrosive liquid into the detection chamber and drive the moving frame, the first fixing ring, the second fixing ring, the airbag, and the corrosive liquid in the detection chamber to move along the axial direction of the tank via the electric guide rail. This achieves sequential coverage of different areas of the inner wall of the tank. It is not necessary to completely fill the entire tank with corrosive liquid, so that the corrosive liquid can fully and without omission come into full contact with the tank. This greatly reduces the time cost of sealing and corrosion resistance testing and improves testing efficiency. When testing the sealing and corrosion resistance of the tank, the leaked corrosive liquid is recovered and reused by the collection component during the testing process, while avoiding improper handling of the leaked corrosive liquid, which could cause environmental pollution or personnel safety accidents. During the tank inspection process, the drive assembly rotates the sleeve and sliding rod circumferentially along the inner wall of the tank, causing the sliding rod to slide into contact with the inner wall. The displacement sensor detects the axial displacement change of the sliding rod in real time, which can accurately determine the wall thickness difference at different locations on the inner wall of the tank, achieving comprehensive and efficient detection of the uniformity of the tank wall thickness. Furthermore, the rotation of the sliding rod drives the scraper to rotate, causing the scraper to make frictional contact with the inner wall of the tank, which helps the detection liquid to penetrate into the defect more quickly. At the same time, the small pressure fluctuations generated by the agitation can accelerate the leakage reaction at the defect, making it easier to detect minor leaks earlier and improving the sensitivity of the sealing test. The sliding rod drives the rotating sleeve to rotate synchronously, so that the spiral blades on the outside of the rotating sleeve make dynamic contact with the corrosive liquid in the detection chamber. This generates an active stirring effect on the corrosive liquid in the detection chamber, allowing the fresh corrosive liquid to continuously and evenly contact the inner wall of the tank for full contact. This significantly enhances the corrosion reaction intensity between the corrosive liquid and the tank material, thereby shortening the reaction cycle required for corrosion resistance testing and improving the efficiency and accuracy of corrosion resistance testing. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the PE storage tank simulation testing equipment of the present invention; Figure 2 This is a cross-sectional view of the tank body of the present invention; Figure 3 This is a three-dimensional structural diagram of the fixed shaft, first fixed ring, second fixed ring, airbag, and collection assembly of the present invention. Figure 4 This is a three-dimensional structural diagram of the first fixing ring, second fixing ring, connector, first nozzle, second nozzle, and drive assembly of the present invention. Figure 5 This is a three-dimensional structural diagram of the tank body, bottom plate, and second detection tube assembly of the present invention. Figure 6 This is a schematic diagram of the three-dimensional structure of the third electric push rod, sleeve, sliding rod, displacement sensor, rotating sleeve and helical blade combination of the present invention.

[0017] In the attached diagram: 1-Fixed frame, 2-Electric guide rail, 3-Moving frame, 4-First electric push rod, 5-Tank body, 101-Fixed shaft, 10101-Connecting pipe, 102-First fixing ring, 10201-Detection chamber, 10202-Exhaust port, 103-Second fixing ring, 104-Sealing ring, 105-Airbag, 106-Inlet pipe, 10601-Branch pipe, 107-Connector, 108-First nozzle, 109-Second nozzle, 202-Rubber block, 203-Press cap, 204- Mounting bracket, 205-Second electric push rod, 206-Collection ring, 20601-First collection chamber, 207-First detection tube, 208-Base plate, 20801-Second collection chamber, 209-Second detection tube, 301-Rotating ring, 302-Driving gear, 303-Motor, 304-Third electric push rod, 305-Sleeve, 306-Sliding rod, 30601-Scraper, 307-Displacement sensor, 308-Rotating sleeve, 309-Helical blade, 310-Driven gear, 311-Spring. Detailed Implementation

[0018] The invention will now be described more fully below with reference to the accompanying drawings, in which presently preferred embodiments of the invention are illustrated. However, the invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided for thoroughness and completeness and to fully convey the scope of the invention to those skilled in the art.

[0019] Example 1: A PE storage tank simulation testing device, such as Figures 1-5 As shown, it includes a fixed frame 1, an electric guide rail 2, and a movable frame 3; the electric guide rail 2 is mounted on the fixed frame 1; the movable frame 3 is fixedly connected to the slider of the electric guide rail 2, and a vision sensor is mounted on the movable frame 3. It also includes a first electric push rod 4, a fixed shaft 101, a first fixed ring 102, a second fixed ring 103, a sealing ring 104, an airbag 105, an air inlet pipe 106, a connector 107, a pressurization assembly, and a collection assembly; the fixed shaft 101 is fixedly connected to the movable frame 3; the connector 107 is fixedly connected to the lower side of the fixed shaft 101; the first fixed ring 102 and the second fixed ring 103 are fixedly connected to the connector 107; the first fixed ring 102 is located above the second fixed ring 103; a detection cavity 10201 is formed between the first fixed ring 102 and the second fixed ring 103; an exhaust hole 1020 is opened on the upper side of the first fixed ring 102. 2. An electromagnetic valve is installed inside the exhaust port 10202; an airbag 105 is fixedly connected to the outer ring surface of both the first fixing ring 102 and the second fixing ring 103, and the airbag 105 is annular; a sealing ring 104 is slidably connected to the first fixing ring 102; two first electric push rods 4 are fixedly connected to the first fixing ring 102; each first electric push rod 4 is fixedly connected to the sealing ring 104; two air inlet pipes 106 are connected to the movable frame 3; two branch pipes 10601 are connected to each air inlet pipe 106; each branch pipe 10601 communicates with the corresponding airbag 105; a pressurization component is connected to the movable frame 3; a collection component is connected to the movable frame 3.

[0020] In this embodiment, the worker first connects the pressurizing assembly to the external water pump and the air inlet pipe 106 to the external air pump. Then, the tank 5 is hoisted to directly below the fixed shaft 101. In the initial state, the first electric push rod 4 pushes the sealing ring 104 downward. At this time, the lower surface of the sealing ring 104 contacts the upper surface of the second fixed ring 103. At this time, the detection chamber 10201 is divided into an inner ring located inside the sealing ring 104 and an outer ring located outside the sealing ring 104. The external water pump then pumps water into the pressurizing assembly. A corrosive liquid is injected, and then the corrosive liquid is injected into the inner ring of the detection chamber 10201 in advance. During this process, the solenoid valve in the exhaust port 10202 is opened, and the gas in the detection chamber 10201 will be discharged through the exhaust port 10202. When the tank 5 is hoisted to the position directly below the fixed shaft 101, the electric guide rail 2 is controlled to drive the moving frame 3 and the fixed shaft 101 to move downward synchronously, and then the fixed shaft 101, the first fixed ring 102, the second fixed ring 103 and the connector 107 are inserted into the inner cavity of the tank 5. When the visual sensor on the moving frame 3 detects that the airbag 105 on the outer ring of the first fixing ring 102 has entered the tank 5, the electric guide rail 2 stops driving the moving frame 3 to move downward. Then, an external air pump inflates the air inlet pipe 106, causing the airbag 105 to expand and make tight contact with the inner wall of the tank 5. At this time, the detection chamber 10201 is a closed space with a volume much smaller than that of the tank 5. Then, the first electric push rod 4 is controlled to move the sealing ring 104 upward, thereby releasing the separation between the inner and outer rings of the detection chamber 10201. Then, the corrosive liquid in the inner ring of the detection chamber 10201 will flow to the outer ring and come into contact with the inner wall of the tank 5. At the same time, the external water pump fills the detection chamber 10201 with corrosive liquid. Since the volume of the detection chamber 10201 is much smaller than that of the tank 5, and corrosive liquid has been pre-filled into the detection chamber 10201, the corrosive liquid can quickly fill the entire detection chamber 10201 in a short time and make full contact with the inner wall area of ​​the tank 5 corresponding to the detection chamber 10201. At the same time, the output pressure of the external water pump can be adjusted to pressurize the inside of the detection chamber 10201. During this process, the solenoid valve in the vent 10202 is closed to prevent the corrosive liquid from leaking from the vent 10202. In this way, the pressure is used to enhance the contact effect between the corrosive liquid and the inner wall of the tank 5, and at the same time, it simulates the water pressure when the tank 5 is full of water, so as to accurately complete the sealing and corrosion resistance test of this area. After the area is inspected, the electric guide rail 2 continues to drive the moving frame 3, fixed shaft 101, first fixed ring 102, second fixed ring 103, and connector 107 downwards, thereby driving the airbag 105 and the corrosive liquid in the detection chamber 10201 to move downwards along the inner wall of the tank 5. During this process, the corrosive liquid in the detection chamber 10201 remains in close contact with the inner wall of the tank 5, and as the detection chamber 10201 moves, different areas on the outer surface of the tank 5 are inspected sequentially. As the fixed shaft 101 moves downward, when the lower surface of the connector 107 contacts the bottom of the tank 5, the electric guide rail 2 drives the moving frame 3 to move upward by 3 cm; to prevent the connector 107 from sticking to the bottom of the tank 5, at this time an 8 cm high cavity will be formed between the second fixed ring 103 and the bottom of the tank 5. Then, the pressure assembly fills the cavity between the second fixed ring 103 and the bottom of the tank 5 with corrosive liquid to test the sealing and corrosion resistance of the bottom of the tank 5, thereby achieving full coverage testing of the inner wall of the tank 5. During the sealing and corrosion resistance testing process, a collection component is used to collect leaked corrosive liquid. When the collection component detects leaked corrosive liquid, it indicates that tank 5 is unqualified. This method ensures that the corrosive liquid fully and completely contacts tank 5, guaranteeing that the testing range covers the entire interior of tank 5 and avoiding blind spots caused by incomplete contact. It eliminates the need to completely fill tank 5 with corrosive liquid, significantly reducing time costs and improving testing efficiency. Simultaneously, the collection component prevents leaks of corrosive liquid, thus avoiding environmental pollution or personnel safety accidents. After the test is completed, the first electric push rod 4 is controlled to move the sealing ring 104 downwards. The system automatically resets the inner and outer rings of the detection chamber 10201, and uses an external air pump to draw air from the inlet pipe 106, causing the airbag 105 to contract and reset. The airbag 105 then no longer contacts the inner wall of the tank 5, and the outer ring of the detection chamber 10201 directly connects to the cavity between the second fixing ring 103 and the tank 5. An external water pump is then controlled to draw air from the cavity between the second fixing ring 103 and the bottom of the tank 5, removing the corrosive liquid from the cavity and simultaneously removing the corrosive liquid from the outer ring of the detection chamber 10201. Finally, the electric guide rail 2 is controlled to move the moving frame 3, the fixed shaft 101, the first fixing ring 102, the second fixing ring 103, and the connector 107 upwards and reset.

[0021] In some optional implementations of this embodiment, such as Figures 1-5 As shown, the pressurization assembly includes a first nozzle 108 and a second nozzle 109; four first nozzles 108 are fixedly connected to the connector 107; a connecting pipe 10101 is provided inside the fixed shaft 101; a second nozzle 109 is fixedly connected to the lower side of the connector 107; each first nozzle 108 and second nozzle 109 is connected to the connecting pipe 10101, and each first nozzle 108 and second nozzle 109 is provided with an electric valve.

[0022] In this embodiment, the worker first connects the connecting pipe 10101 to the external water pump. Initially, the electric valves in the first nozzle 108 and the second nozzle 109 are both closed. When it is necessary to inject corrosive liquid into the detection chamber 10201, the electric valve in the first nozzle 108 is opened, and then the external water pump inputs corrosive liquid into the connecting pipe 10101. The corrosive liquid then flows into the detection chamber 10201 through the first nozzle 108. When it is necessary to inject corrosive liquid into the cavity between the second fixing ring 103 and the bottom of the tank 5... When corrosive liquid is introduced, the electric valve in the first nozzle 108 is closed and the electric valve in the second nozzle 109 is opened. Then, the corrosive liquid is introduced into the connecting pipe 10101 through an external water pump. The corrosive liquid then flows into the cavity between the second fixing ring 103 and the bottom of the tank 5 through the second nozzle 109. After the test is completed, the connecting pipe 10101 is pumped by the external water pump, which causes the second nozzle 109 to generate suction force, thereby removing the corrosive liquid from the cavity between the second fixing ring 103 and the bottom of the tank 5.

[0023] In some optional implementations of this embodiment, such as Figures 1-3 As shown, the collection assembly includes a mounting bracket 204, a second electric push rod 205, a collection ring 206, a first detection tube 207, a base plate 208, and a second detection tube 209. Two mounting brackets 204 are fixedly attached to the movable frame 3. A second electric push rod 205 is bolted to each mounting bracket 204. Each second electric push rod 205 is bolted to a collection ring 206. A first collection chamber 20601 is opened on the side of the collection ring 206 near the tank body 5. A first detection tube 207 is fixedly attached to the collection ring 206. The first detection tube 207 communicates with the first collection chamber 20601. A base plate 208 is placed directly below the fixed shaft 101. A second collection chamber 20801 is opened on the base plate 208. A second detection tube 209 is fixedly attached to the front side of the base plate 208. The second detection tube 209 communicates with the second collection chamber 20801. Flow sensors are fixedly attached to both the first detection tube 207 and the second detection tube 209.

[0024] In this embodiment, before testing, the first detection tube 207 and the second detection tube 209 are connected to an external pump. When the tank 5 is hoisted to directly below the fixed shaft 101, the tank 5 needs to be placed on the base plate 208. When the moving frame 3 moves downward and inserts the fixed shaft 101 into the inner cavity of the tank 5, the moving frame 3 will also drive the mounting frame 204, the second electric push rod 205, and the collecting ring 206 to move downward, thereby fitting the collecting ring 206 onto the outer wall of the tank 5. At this time, the inner ring surface of the collecting ring 206 is in full contact with the outer wall of the tank 5, and the first collecting cavity 20601 is in a sealed state. When the first fixed ring 102 and the second fixed ring 103 move up and down, the second electric push rod 205 will also drive the collecting ring 206 to move up and down, thereby performing testing on the outer surface of the tank 5. During the testing process, the first collection chamber 20601 and the detection chamber 10201 are at the same horizontal level. Therefore, when a leak occurs during the testing process, the corrosive liquid leaking from the detection chamber 10201 will flow into the first collection chamber 20601. Then, the corrosive liquid is pumped through the first detection pipe 207 to the external collection tank by an external pump. When testing the lower surface of the tank 5, the corrosive liquid leaking from the lower surface of the tank 5 will flow into the second collection chamber 20801. Then, the corrosive liquid is pumped through the second detection pipe 209 to the external collection tank by an external pump. In this way, the leaked corrosive liquid can be recycled during the testing process, while avoiding improper handling of the leaked corrosive liquid, which could cause environmental pollution or personnel safety accidents.

[0025] In a further preferred embodiment of the present invention, such as Figure 4 and Figure 5 As shown, it also includes a rubber block 202; a rubber block 202 is fixedly attached to the lower side of each sealing ring 104.

[0026] In this embodiment, the rubber block 202 improves the sealing effect of the contact surface between the sealing ring 104 and the first fixing ring 102, and the contact surface between the sealing ring 104 and the second fixing ring 103, thereby preventing the leakage of corrosive liquid in the detection chamber 10201.

[0027] In a further preferred embodiment of the present invention, the airbag 105 is made of nitrile rubber.

[0028] In this embodiment, the airbag 105 is made of nitrile rubber, which has good elasticity, excellent sealing performance, wear resistance, strong corrosion resistance, and long service life.

[0029] In a further preferred embodiment of the present invention, a rubber pad is provided on the contact surface between the collecting ring 206 and the tank body 5.

[0030] In this embodiment, the rubber pad provided on the contact surface between the collecting ring 206 and the tank 5 improves the sealing effect of the first collecting chamber 20601, preventing liquid flowing out of the tank 5 from leaking through the gap between the collecting ring 206 and the tank 5, thus affecting the detection effect.

[0031] In a further preferred embodiment of the present invention, such as Figure 1 and Figure 2 As shown, it also includes a press cover 203; the press cover 203 is fixedly attached to the lower side of the two mounting brackets 204.

[0032] In this embodiment, when the moving frame 3 moves downward to insert the fixed shaft 101 into the inner cavity of the tank 5, the moving frame 3 will drive the mounting frame 204 to move downward, thereby driving the pressing cover 203 to move downward and covering the upper side of the tank 5 with the pressing cover 203. This will press and fix the tank 5 during the detection process, preventing the airbag 105 and the collecting ring 206 from moving the tank 5 when they move up and down, thus affecting the detection of the tank 5.

[0033] Example 2: Based on Example 1, as follows Figures 4-6 As shown, it also includes a sleeve 305, a drive assembly, a sliding rod 306, a displacement sensor 307, and a spring 311; the drive assembly is connected to the first fixed ring 102; two sleeves 305 are connected to the drive assembly; a sliding rod 306 is slidably connected to each sleeve 305, and a spring 311 is fixed between each sliding rod 306 and the sleeve 305; a displacement sensor 307 is fixedly connected to each sleeve 305; the displacement sensor 307 is in contact with the sliding rod 306.

[0034] In this embodiment, existing PE storage tanks commonly employ blow molding, which is prone to uneven wall thickness distribution due to factors such as raw material flowability, molding pressure, and mold precision. Existing technologies typically do not specifically address this issue. However, uneven wall thickness leads to stress concentration in thinner areas under load. During internal medium pressure, external loads, or temperature cycling, these weaker areas are highly susceptible to plastic deformation, triggering crack initiation and propagation, ultimately resulting in leaks or even explosions. Therefore, during the sealing and corrosion resistance testing of the tank body 5, the first step is to use a drive unit... The drive sleeve 305 moves toward the inner wall of the tank 5 until the end of the sliding rod 306 is in close contact with the inner wall of the tank 5. At this time, the spring 311 is initially compressed by the inner wall of the tank 5. The drive assembly drives the sleeve 305 to rotate circumferentially around its fixed axis 101 inside the tank 5, which in turn drives the sliding rod 306 to rotate circumferentially along the inner wall of the tank 5, so that the sliding rod 306 makes sliding contact with the inner wall of the tank 5. When the sliding rod 306 moves to a thicker area of ​​the inner wall of the tank 5, the reaction force exerted by the inner wall of the tank 5 on the sliding rod 306 increases, causing the spring 311 to be further compressed and contracted, and the sliding rod 306 slides into the sleeve 305. When the sliding rod 306 moves to a thinner area of ​​the inner wall of the tank 5, the reaction force of the inner wall of the tank 5 on the sliding rod 306 decreases, the spring 311 elastically resets and extends, pushing the sliding rod 306 to move outward of the sleeve 305. Based on the above principle, by detecting the axial displacement change of the sliding rod 306 in real time through the displacement sensor 307, the wall thickness difference at different positions of the inner wall of the tank 5 can be accurately determined, realizing a comprehensive and efficient detection of the uniformity of the wall thickness of the tank 5.

[0035] In some optional implementations of this embodiment, such as Figure 4 and Figure 6 As shown, the drive assembly includes a rotating ring 301, a driving gear 302, a motor 303, a third electric push rod 304, and a driven gear 310; the rotating ring 301 is rotatably connected to the first fixed ring 102; the driven gear 310 is fixedly connected to the upper side of the rotating ring 301; the motor 303 is fixedly connected to the upper side of the first fixed ring 102; the driving gear 302 is fixedly connected to the output end of the motor 303; the driving gear 302 meshes with the driven gear 310; two third electric push rods 304 are fixedly connected to the rotating ring 301; the telescopic end of each third electric push rod 304 is fixedly connected to the corresponding sleeve 305.

[0036] In this embodiment: during the inspection of the tank 5, the sleeve 305 is first pushed towards the inner wall of the tank 5 by the third electric push rod 304 until the end of the sliding rod 306 is in close contact with the inner wall of the tank 5. At this time, the spring 311 is initially compressed by the squeezing action of the inner wall of the tank 5. Then, the motor 303 drives the drive gear 302 to rotate, which in turn drives the driven gear 310 and the rotating ring 301 to rotate, which in turn drives the sleeve 305 and the sliding rod 306 to rotate circumferentially along the inner wall of the tank 5.

[0037] In a further preferred embodiment of the present invention, such as Figure 4 and Figure 5 As shown, it also includes a rotating sleeve 308 and a spiral blade 309; a rotating sleeve 308 is slidably connected to each sliding rod 306; four spiral blades 309 are connected to each rotating sleeve 308; a scraper 30601 is fixedly connected to the side of each sliding rod 306 facing the inner wall of the tank 5.

[0038] In this embodiment, as the driving assembly drives the sleeve 305 and sliding rod 306 to rotate circumferentially along the inner wall of the tank 5, the rotating sleeve 308 rotates synchronously with the sliding rod 306. At this time, the spiral blades 309 on the outer side of the rotating sleeve 308 come into contact with the corrosive liquid in the detection chamber 10201. Under the reaction force of the corrosive liquid, the spiral blades 309 drive the rotating sleeve 308 to rotate autonomously around the axis of the sliding rod 306. The rotating spiral blades 309 will actively stir the corrosive liquid in the detection chamber 10201, effectively breaking the static adhesion state of the liquid in the detection area of ​​the inner wall of the tank 5, destroying the liquid film boundary layer, promoting the overall flow and local renewal of the corrosive liquid in the detection chamber 10201, and allowing fresh corrosive liquid to flow freely. The corrosive liquid can continuously and uniformly contact the inner wall of the tank 5, significantly enhancing the corrosion reaction intensity between the corrosive liquid and the material of the tank 5. This shortens the reaction cycle required for corrosion performance testing and improves the efficiency and accuracy of corrosion testing. Furthermore, when the drive assembly rotates the sleeve 305 and the sliding rod 306 circumferentially along the inner wall of the tank 5, the scraper 30601 will make frictional contact with the inner wall of the tank 5. If there are micro-cracks, pinholes, or other sealing defects on the inner wall of the tank 5, the scraping action of the scraper 30601 can help the test liquid penetrate into the defect more quickly. At the same time, the small pressure fluctuations generated by the agitation can accelerate the leakage reaction at the defect, making it easier to detect minor leaks earlier and improving the sensitivity of sealing performance testing.

[0039] Although the invention has been described with reference to exemplary embodiments, it should be understood that the invention is not limited to the disclosed exemplary embodiments. The scope of the following claims should be given the broadest interpretation so as to cover all variations and equivalent structures and functions.

Claims

1. A PE storage tank simulation testing device, characterized in that: The device includes a fixed frame (1); an electric guide rail (2) is mounted on the fixed frame (1); a movable frame (3) is fixedly connected to the slider of the electric guide rail (2); it also includes a first electric push rod (4) and a fixed shaft (101) connected to the movable frame (3); a connector (107) is fixedly connected to the lower side of the fixed shaft (101); a first fixed ring (102) and a second fixed ring (103) are fixedly connected to the connector (107); the first fixed ring (102) is located above the second fixed ring (103); a detection cavity (10201) is formed between the first fixed ring (102) and the second fixed ring (103); an exhaust hole (10202) is opened on the upper side of the first fixed ring (102), and a solenoid valve is installed in the exhaust hole (10202); the first fixed ring (102) and the outer ring of the second fixed ring (103) are both fixed with airbags (105), and the airbags (105) are annular; a sealing ring (104) is slidably connected to the first fixed ring (102); two first electric push rods (4) are fixedly connected to the first fixed ring (102); each first electric push rod (4) is fixedly connected to the sealing ring (104); several air inlet pipes (106) are connected to the moving frame (3); two branch pipes (10601) are connected to each air inlet pipe (106); each branch pipe (10601) is connected to the corresponding airbag (105); a pressurizing component for conveying liquid into the detection chamber (10201) is connected to the moving frame (3); a collection component for collecting leaked liquid is connected to the moving frame (3).

2. The PE storage tank simulation testing equipment according to claim 1, characterized in that: The pressurization assembly includes several first nozzles (108) connected to the connector (107); a connecting pipe (10101) is provided inside the fixed shaft (101); a second nozzle (109) is fixedly connected to the lower side of the connector (107); each first nozzle (108) and second nozzle (109) is connected to the connecting pipe (10101), and each first nozzle (108) and second nozzle (109) is provided with an electric valve.

3. The PE storage tank simulation testing equipment according to claim 1, characterized in that: The collection assembly includes a mounting bracket (204) fixed to a movable frame (3); a second electric push rod (205) is fixed to each mounting bracket (204); a collection ring (206) is fixed to each second electric push rod (205); a first collection chamber (20601) is opened on the side of the collection ring (206) near the tank (5); a first detection tube (207) is fixed to the collection ring (206); the first detection tube (207) is connected to the first collection chamber (20601); a base plate (208) is placed directly below the fixed shaft (101); a second collection chamber (20801) is opened on the base plate (208); a second detection tube (209) is fixed to the front side of the base plate (208); the second detection tube (209) is connected to the second collection chamber (20801); a flow sensor is fixed to both the first detection tube (207) and the second detection tube (209).

4. The PE storage tank simulation testing equipment according to claim 1, characterized in that: It also includes a rubber block (202) connected to the sealing ring (104).

5. A PE storage tank simulation testing device according to claim 1, characterized in that: The airbag (105) is made of nitrile rubber.

6. A PE storage tank simulation testing device according to claim 3, characterized in that: A rubber pad is provided on the contact surface between the collecting ring (206) and the tank (5).

7. A PE storage tank simulation testing device according to claim 3, characterized in that: It also includes a press cover (203); the press cover (203) is fixedly attached to the lower side of the two mounting brackets (204).

8. A PE storage tank simulation testing device according to claim 1, characterized in that: It also includes a sleeve (305) and a drive assembly connected to the first fixed ring (102) for rotating the sleeve (305); a plurality of sleeves (305) are connected to the drive assembly; a sliding rod (306) is slidably connected to each sleeve (305), and a spring (311) is fixed between each sliding rod (306) and the sleeve (305); a displacement sensor (307) is fixed to each sleeve (305); the displacement sensor (307) is in contact with the sliding rod (306).

9. A PE storage tank simulation testing device according to claim 8, characterized in that: The drive assembly includes a rotating ring (301) connected to a first fixed ring (102); a driven gear (310) is fixedly connected to the upper side of the rotating ring (301); a motor (303) is fixedly connected to the upper side of the first fixed ring (102); a driving gear (302) is fixedly connected to the output end of the motor (303); the driving gear (302) meshes with the driven gear (310); a plurality of third electric push rods (304) are fixedly connected to the rotating ring (301); the telescopic end of each third electric push rod (304) is fixedly connected to the corresponding sleeve (305).

10. A PE storage tank simulation testing device according to claim 8, characterized in that: It also includes a rotating sleeve (308) connected to the sliding rod (306); each rotating sleeve (308) is connected to several spiral blades (309); each sliding rod (306) is fixed with a scraper (30601) on the side facing the inner wall of the tank (5).

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