A device for detecting the permanent deformation of the rubber sealing belt of a bridge expansion device

Abstract

The present application relates to a device for detecting the permanent deformation of the rubber sealing belt of a bridge expansion device, and belongs to the technical field of detecting the constant permanent deformation of rubber. The device includes a storage box, a rubber sample transfer mechanism, a rubber sample holding assembly, a compression control assembly, and a post-compression rubber sample transfer and measurement assembly. Several rubber samples are stored inside the storage box, and the rubber sample transfer mechanism is used to transfer the rubber samples in the storage box to the rubber sample holding assembly. The rubber sample holding assembly is responsible for applying and maintaining a specific amount of compression to the rubber sample. The compression control assembly is used to adjust the distance between the extrusion plate and the fixed plate. The post-compression rubber sample transfer and measurement assembly is arranged below the rubber sample holding assembly. The present application realizes automatic and continuous detection of multiple rubber samples, and can perform detection work uninterruptedly, thereby reducing the labor intensity of the detection personnel and improving the detection efficiency.

Description

Technical Field

[0001] The present application belongs to the technical field of rubber constant compression permanent deformation detection, and specifically relates to a device for detecting the compression permanent deformation of a rubber sealing belt of a bridge expansion device. Background Art

[0002] Bridge expansion devices are an integral part of bridge structures, primarily designed to address bridge expansion and contraction issues caused by factors such as temperature fluctuations, loads, and material aging. These factors can cause variations in bridge length. If left unaddressed, these can lead to serious consequences such as cracking and deformation of the bridge deck, compromising both traffic safety and the lifespan of the bridge. Therefore, bridge expansion devices must not only possess excellent adaptability and durability but also effectively mitigate stress concentrations in various environmental conditions.

[0003] The rubber sealing strip is a critical component in bridge expansion joints. Its primary function is to prevent moisture, debris, and other foreign matter from entering the expansion joint, thereby protecting the internal mechanical components from erosion and wear. Furthermore, the rubber sealing strip acts as a buffer, reducing vibration and noise generated by passing vehicles and enhancing driving comfort. The quality of the rubber sealing strip is directly related to the performance and lifespan of the entire expansion joint. Failure of the rubber sealing strip can lead to the loss of waterproof and dustproof properties of the expansion joint, leading to further maintenance issues.

[0004] Over long-term use, rubber sealing strips undergo repeated compression and rebound, which gradually and irreversibly deforms them. This deformation, known as "constant compression set," weakens the sealing performance of the rubber strip and reduces its ability to block water and foreign matter. Therefore, regularly testing the constant compression set of rubber sealing strips is crucial for assessing their operating condition and remaining lifespan. Accurately understanding this parameter helps to promptly identify potential faults, enabling proactive repair or replacement measures and avoiding safety hazards and financial losses caused by seal failure.

[0005] Currently, the main methods for measuring the permanent deformation of rubber sealing belts under constant compression include static compression testing and dynamic compression testing. Static compression testing typically involves placing a specimen under a specific pressure for a period of time in a laboratory setting, then measuring the height difference after recovery to calculate the deformation. Dynamic compression testing, on the other hand, simulates actual operating conditions by applying periodic pressure to the specimen to observe its changes over time. While both methods can provide certain reference data, they are generally complex and time-consuming. Furthermore, the entire process relies on manual labor and lacks support for automated and intelligent control.

[0006] Current methods for testing the constant compression permanent deformation of rubber sealing strips have significant limitations: First, since each step requires manual participation, a significant amount of time is required from sample preparation to final result reading, resulting in low overall testing efficiency; second, human errors are easily introduced during manual operation, affecting the accuracy of test results; finally, the lack of effective information management system support prevents real-time data collection and analysis, making it difficult to meet the rapid response requirements of modern industrial production. To address the above issues, it is particularly urgent to develop a new type of testing equipment that integrates automatic loading, intelligent monitoring, and data analysis functions. This will not only significantly improve work efficiency and shorten the testing cycle, but also ensure the consistency and reliability of each test, promoting the development of bridge expansion joints in a safer and more reliable direction. Summary of the Invention

[0007] The technical problem to be solved by this application is: to overcome the shortcomings of the existing technology and provide a device for detecting the permanent deformation of the rubber sealing belt of a bridge expansion device. This application realizes automatic and continuous detection of multiple rubber samples, and can perform detection work uninterruptedly, thereby reducing the labor intensity of the detection personnel and improving the detection efficiency.

[0008] The technical solution adopted by this application to solve the problems existing in the prior art is:

[0009] A device for detecting the permanent deformation of a rubber sealing belt of a bridge expansion device comprises a storage box, a rubber sample transport mechanism, a rubber sample holding assembly, a compression control assembly, and a compressed rubber sample transport and measurement assembly.

[0010] The storage box with an open top is used to stack and store a number of rubber samples. A supporting plate is slidingly provided inside the storage box, and the supporting plate drives the rubber samples to move upward.

[0011] The rubber sample transport mechanism is used to transport the rubber sample moved upward to the outside of the storage box to the rubber sample holding assembly. The rubber sample transport mechanism includes a first grating for detecting the thickness of the rubber sample in an initial state.

[0012] The rubber sample holding assembly includes a plurality of rubber sample compression devices distributed in a ring array around the rotating sleeve. The rubber sample compression device includes a fixed plate and an extrusion plate slidably connected to the fixed plate. The fixed plate is fixedly connected to the rotating sleeve through a connecting rod. The self-locking motor drives the rotating sleeve to rotate. Through the rotation of the rotating sleeve, the rubber sample compression device is sequentially connected to the rubber sample transfer mechanism.

[0013] The compression control assembly is used to adjust the distance between the extrusion plate and the fixed plate.

[0014] The compressed rubber sample transfer and measurement assembly is arranged below the rubber sample holding assembly. The compressed rubber sample slides into the compressed rubber sample transfer and measurement assembly. The thickness of the compressed rubber sample is detected by the second grating in the compressed rubber sample transfer and measurement assembly. The thickness of the compressed rubber sample is compared with the thickness of the rubber sample in its initial state to obtain the value of the constant compression permanent deformation of the rubber sample.

[0015] Preferably, the side wall of the storage box is provided with a vertically arranged slide, and the end face of the support plate is convexly provided with a slider, which is slidably arranged inside the slide, and the slider that passes through the outside of the storage box is threadedly connected to a first screw, and the end of the vertically arranged first screw is connected to a first motor, and the first motor is fixedly connected to the storage box.

[0016] Preferably, the rubber sample transfer mechanism includes a horizontal platform and a turning platform, the end of the turning platform is rotatably connected to the horizontal platform, a linear module is mounted above the horizontal platform, and the sliding part of the linear module is connected to a first push plate. The first push plate pushes the rubber sample moved to the top of the outside of the storage box via the horizontal platform to the turning platform.

[0017] Preferably, a threaded plate is provided on the side of the extrusion plate away from the fixed plate, the threaded plate is fixedly connected to the fixed plate, a second screw is threadedly connected to the threaded plate, the second screw is rotatably connected to the extrusion plate, and a first polygonal rod is fixed to the end of the second screw.

[0018] Preferably, the compression control assembly is respectively arranged on the upper and lower sides of the rubber sample transfer mechanism, and the compression control assembly includes a second motor and a third telescopic device. The output shaft of the second motor is connected to the second polygonal rod, and a sleeve is slidably provided on the second polygonal rod. The third telescopic device controls the sliding of the sleeve. The sleeves of the two compression control assemblies are arranged opposite to the first polygonal rod of the rubber sample compression device rotated to the upper and lower ends.

[0019] Preferably, the sleeve is arranged horizontally, the first polygonal rod of the rubber sample compression device rotated to the upper and lower ends is arranged horizontally, and the fixing plate and the extrusion plate are arranged vertically.

[0020] Preferably, the compressed rubber sample transport and measurement assembly includes a blanking box with an open upper end, the upper end opening of the blanking box is located directly below the rubber sample compression device arranged vertically below, an opening is provided on the bottom side wall of the blanking box, the size of the opening is greater than or equal to the size of the compressed rubber sample, a suction cup is provided at the opening, and the end of the suction cup facing away from the blanking box is connected to the fourth telescopic device through a horizontal rod, and the second grating is horizontally arranged on both sides of the path where the suction cup drives the rubber sample to move backward.

[0021] Preferably, the suction cup is an air suction cup, the suction cup and the fourth telescopic device are connected via an air suction pipe, and the air suction pipe is connected to an air pump via an external air pipe.

[0022] Preferably, the storage box, the rubber sample transport mechanism, the rubber sample holding assembly, the compression amount control assembly and the compressed rubber sample transport measurement assembly are arranged inside the housing.

[0023] Preferably, a discharge port is provided below the shell, and the discharge port is arranged directly below the compressed rubber sample transfer and measurement assembly. The discharge port is connected to a drawer below, and the drawer is slidably connected to the shell through a slide rail.

[0024] Compared with the prior art, this application has the following beneficial effects:

[0025] (1) It is only necessary to manually place multiple rubber samples into the storage box, and subsequent testing work will be carried out automatically without manual intervention. Testing can be carried out 24 hours a day, thereby reducing labor intensity and improving testing efficiency.

[0026] (2) Through the rotating rubber sample compression device, multiple rubber samples can be compressed and maintained at the same time, which improves the detection efficiency.

[0027] (3) A rubber sample database is automatically established in the system through laser-printed QR codes. The database contains rich and detailed information, which is convenient for digital office and subsequent inquiries. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The present application is further described below with reference to the accompanying drawings and examples.

[0029] Figure 1 This is the first structural diagram of a device for detecting the permanent deformation of a rubber sealing belt of a bridge expansion device according to the present application.

[0030] Figure 2 This is the second structural diagram of a device for detecting the permanent compression deformation of a rubber sealing belt of a bridge expansion device in this application.

[0031] Figure 3 This is a partial cross-sectional view of the housing of a device for detecting the permanent compression deformation of a rubber sealing belt of a bridge expansion device according to the present application.

[0032] Figure 4 This is the internal structure diagram of a device for detecting the permanent deformation of the rubber sealing belt of a bridge expansion device in this application.

[0033] Figure 5 for Figure 4 Front view of

[0034] Figure 6 for Figure 4 The rear view,

[0035] Figure 7This is the structural diagram of the rubber sample transfer mechanism when the shift plates are parallel.

[0036] Figure 8 This is the structural diagram of the rubber sample transfer mechanism after the shift plate is rotated.

[0037] Figure 9 for Figure 8 Bottom view of

[0038] Figure 10 This is a partial cross-sectional view of the rubber sample storage box.

[0039] Figure 11 The diagram of the rubber sample compression holding assembly structure is shown below.

[0040] Figure 12 This is the structure diagram of the rubber sample compression device.

[0041] Figure 13 This is the structural diagram of the unloading device.

[0042] Figure 14 This is the structural diagram of the compression control assembly.

[0043] Figure 15 for Figure 14 A partial cross-sectional view of

[0044] Figure 16 This is the structural diagram of the transport and measurement assembly of the compressed rubber sample.

[0045] Figure 17 for Figure 16 A partial cross-sectional view of .

[0046] In the figure: 1-storage box, 101-slide, 2-support plate, 201-slider, 3-first motor, 4-first screw, 5-rubber sample, 6-first push plate, 7-linear module, 8-horizontal platform, 9-first grating, 10-turning table, 1001-rear baffle, 1002-guide plate, 11-first telescopic device, 1101-roller, 12-laser print head, 13-injection pipe, 14-fixed plate, 1401-threaded plate, 1402-slot, 15-extrusion plate, 16-second screw, 17-first polygonal rod, 18-rotating sleeve, 1801-connecting rod, 1802-ring gear, 19-fixed shaft, 20-gear, 2001-input shaft, 21-second push plate, 22-second telescopic device, 23-second motor, 24-second polygonal rod, 25-sleeve, 2501-clamping ring, 26-shift lever, 27-third telescopic device, 28-unloading box, 29-QR code reader, 30-suction cup, 3001-exhaust pipe, 31-external air pipe, 32-fourth telescopic device, 33-second grating, 34-control panel, 35-housing, 3501-discharge port, 36-slide rail, 37-drawer, 38-loading port sealing door. DETAILED DESCRIPTION

[0047] In conjunction with the accompanying drawings, a device for detecting the permanent compression deformation of a rubber sealing belt of a bridge expansion device of the present application is further described in detail, but this does not limit the present application.

[0048] Depend on Figures 1 to 17 As shown, a device for detecting the permanent deformation of the rubber sealing belt of a bridge expansion device includes a storage box 1, a rubber sample transfer mechanism, a rubber sample holding assembly, a compression control assembly, and a compressed rubber sample transfer and measurement assembly.

[0049] The storage box 1 with an open top is used to stack and store a number of rubber samples 5 that need to be monitored for constant compression permanent deformation. A support plate 2 is slidingly provided inside the storage box 1, and the support plate 2 drives the rubber samples 5 to move upward.

[0050] The rubber samples 5 to be tested are of uniform size and are arranged in a row inside the storage box 1. Figure 10 As shown, the side wall of the storage box 1 is provided with at least two vertically arranged slides 101, and the end surface of the support plate 2 is convexly provided with a slider 201, and the slider 201 is slidably arranged inside the slide 101. One of the sliders 201 that passes through the outside of the storage box 1 is threadedly connected to a first screw rod 4, and the end of the vertically arranged first screw rod 4 is connected to a first motor 3, and the first motor 3 is fixedly connected to the storage box 1. A support plate is provided at the upper and lower ends of the outer wall of the storage box 1, and the upper and lower ends of the first screw rod 4 are rotatably connected to the two support plates respectively. The first motor 3 cooperates with the first screw rod 4 to drive the support plate 2 up and down. This arrangement can save space and maximize the depth of the storage box 1 for storing more rubber samples 5.

[0051] The rubber sample transfer mechanism is used to transfer the rubber sample 5 moved to the outside of the storage box 1 to the rubber sample holding assembly. The rubber sample transfer mechanism includes a first grating 9 for detecting the thickness of the rubber sample 5 in its initial state. Figures 7 to 9As shown, the rubber sample transfer mechanism includes a horizontal platform 8 and a turning platform 10. The end of the turning platform 10 facing the rubber sample holding assembly is rotatably connected to the horizontal platform 8. A linear module 7 is mounted above the horizontal platform 8. A U-shaped first push plate 6 is connected to the sliding portion of the linear module 7. The first push plate 6 pushes the rubber sample 5, which has been moved to the upper portion of the storage box 1, onto the turning platform 10 via the horizontal platform 8. When the turning platform 10 is horizontal, its top surface is flush with the top surface of the horizontal platform 8. A crossbeam fixedly connected to the horizontal platform 8 is provided at the bottom of the turning platform 10 to support the horizontally arranged turning platform 10. To control the rotation of the turning platform 10, in this embodiment, a rotating roller 1101 is provided at the bottom of the turning platform 10. The lower portion of the bracket of the roller 1101 is connected to the telescopic rod of a first telescopic device 11. The first telescopic device 11 controls the up and down movement of the roller 1101, thereby driving the rotation of the turning platform 10.

[0052] The transmitting and receiving parts of the first grating 9 are respectively arranged on both sides of the horizontal platform 8. During the movement, the bottom surface of the rubber sample 5 abuts against the plane of the horizontal platform 8. The first push plate 6 is located at the rear end of the rubber sample 5 in the moving direction. To avoid affecting the thickness detection results, the height of the first push plate 6 is less than the thickness of the rubber sample 5. The rear end of the rubber sample 5 is stuck in the U-shaped first push plate 6.

[0053] When the turning platform 10 is horizontal, the rubber sample 5 is pushed from the horizontal platform 8 into the turning platform 10. The first push plate 6 then moves backward and out of the turning platform 10. To position the rubber sample 5, a rear baffle 1001 is vertically installed at the end of the turning platform 10 facing away from the horizontal platform 8. The rubber sample 5 is positioned when it abuts against the rear baffle 1001. The first telescopic device 11 controls the rotation and tilting of the turning platform 10, allowing the rubber sample 5 to slide from the turning platform 10 into the rubber sample holding assembly, entering the lowering process. To guide and prevent the rubber sample 5 from shifting during sliding, an inclined guide plate 1002 is installed on the turning platform 10. To facilitate the sliding of the rubber sample 5, several air injection pipes 13 are fixedly connected parallel to the turning platform 10 at the end facing away from the rubber sample holding assembly. The air injection pipes 13 are connected to the high-pressure air supply system through a main air inlet pipe. The high-pressure air supply system includes a compressed air pump, an air tank, and an electronically controlled exhaust valve.

[0054] Depend on Figure 11 As shown, the rubber sample holding assembly includes a plurality of rubber sample compression devices distributed in a ring array around a rotating sleeve 18. The rubber sample compression device includes a fixed plate 14 and an extrusion plate 15 slidably connected to the fixed plate 14. The fixed plate 14 is fixedly connected to the rotating sleeve 18 via a connecting rod 1801. The self-locking motor drives the rotating sleeve 18 to rotate. Through the rotation of the rotating sleeve 18, the rubber sample compression devices are sequentially connected to the rubber sample transfer mechanism.

[0055] Depend on Figure 12 As shown, a threaded plate 1401 is provided on the side of the extrusion plate 15 facing away from the fixed plate 14. The threaded plate 1401 is fixedly connected to the fixed plate 14. A second screw 16 is threadedly connected to the threaded plate 1401, which is rotatably connected to the extrusion plate 15. A first polygonal rod 17 is fixed to the end of the second screw 16. The rubber sample compression device corresponding to the rotated turning table 10 is arranged at an angle. The fixed plate 14 included therein is tilted at an angle consistent with the tilt angle of the turning table 10, and the two are aligned. The openings of the fixed plate 14 and the extrusion plate 15 face the turning table 10. The rubber sample 5 that slides off the turning table 10 slides onto the fixed plate 14. The fixed plate 14 is an L-shaped plate that can block the rubber sample 5 and prevent it from sliding. The rubber sample compression device loaded with the rubber sample 5 continues to rotate. During the rotation, the openings of the fixed plate 14 and the extrusion plate 15 are gradually arranged upward. When the openings of the fixed plate 14 and the extrusion plate 15 are arranged vertically upward, the compression control assembly is used to adjust the distance between the extrusion plate 15 and the fixed plate 14. The two plates compress the rubber sample 5 according to the set compression ratio and maintain it for 24 hours.

[0056] Depend on Figure 14 as well as Figure 15 As shown, the compression control assemblies are located on the upper and lower sides of the rubber sample transport mechanism. They include a second motor 23 and a third telescopic device 27. The output shaft of the second motor 23 is connected to a second polygonal rod 24. A sleeve 25 is slidably mounted on the second polygonal rod 24. The sleeve 25 is equipped with a retaining ring 2501, which is engaged with a lever 26. The telescopic rod of the third telescopic device 27 is connected to the lever 26, which controls the sliding movement of the sleeve 25. The sleeves 25 of the two compression control assemblies are positioned opposite the first polygonal rod 17 of the rubber sample compression mechanism, which rotates to the upper and lower ends. The internal shape and dimensions of the sleeve 25 match those of the first polygonal rod 17. When the sleeve 25 is attached to the first polygonal rod 17, it can drive the first polygonal rod 17 to rotate.

[0057] For ease of installation, the sleeve 25 is arranged horizontally, the first polygonal rod 17 of the rubber sample compression device rotated to the upper and lower ends is arranged horizontally, and the fixing plate 14 and the extrusion plate 15 are arranged vertically.

[0058] The compressed rubber sample transfer and measurement assembly is disposed below the rubber sample holding assembly. The compressed rubber sample 5 slides into the compressed rubber sample transfer and measurement assembly. The second grating 33 in the compressed rubber sample transfer and measurement assembly detects the thickness of the compressed rubber sample 5. The thickness of the compressed rubber sample 5 is compared with the thickness of the rubber sample 5 in its initial state to obtain a value of the constant compression permanent deformation of the rubber sample 5.

[0059] Depend on Figure 16 as well as Figure 17 As shown, the compressed rubber sample transport and measurement assembly includes a blanking box 28 with an open upper end. The open upper end of the blanking box 28 is located directly below the rubber sample compression device arranged vertically below. An opening is provided on the bottom side wall of the blanking box 28. The opening size is greater than or equal to the size of the compressed rubber sample 5. A suction cup 30 is provided at the opening. The end of the suction cup 30 facing away from the blanking box 28 is connected to a fourth telescopic device 32 via a horizontal rod. Second gratings 33 are horizontally arranged on both sides of the path where the suction cup 30 drives the rubber sample 5 to move backward.

[0060] The suction cup 30 is an air suction cup, and the suction cup 30 is connected to the fourth telescopic device 32 via an air suction pipe 3001 , and the air suction pipe 3001 is connected to an air suction pump via an external air pipe 31 .

[0061] After the rubber sample 5 has been squeezed for a certain amount of time in the compression device, the device rotates to directly above the discharge box 28. The third telescopic device 27 controls the sleeve 25 to slide onto the first polygonal rod 17. The second motor 23, through the second polygon 24, the sleeve 25, and the first polygonal rod 17, rotates the second screw 16, widening the gap between the compression plate 15 and the fixed plate 14. This releases the pressure on the rubber sample 5, freeing it to fall into the discharge box 28. Once the rubber sample 5 has fallen to the bottom of the discharge box 28, it abuts against the suction cup 30, where it is supported and held. After resting for 30 minutes to one hour, the rubber sample 5 recovers. The fourth telescopic device 32, using the suction cup 30, then moves the rubber sample 5 outward, between the emitting and receiving portions of the second grating 33. The second grating 33 measures the thickness of the compressed rubber sample 5.

[0062] The upper end of the discharge box 28 is open in a V-shaped opening, which is convenient for the rubber sample 5 to drop. After a long period of extrusion, the rubber sample 5 is easily adhered to the fixing plate 14 or the extrusion plate 15 and will not fall off naturally. For this reason, a discharge device is provided above the rubber sample compression device. Figure 13 As shown, the unloading device includes a second push plate 21 and a second telescopic device 22 connected above the second push plate 21. A through slot 1402 is provided on the vertical surface of the L-shaped fixing plate 14, corresponding to the second push plate 21. When the compression plate 15 is opened to a certain distance, the second push plate 21 passes through the slot 1402 and enters the rubber sample compression device, pushing the rubber sample 5 downward.

[0063] Since the unloading device is arranged inside the rubber sample holding assembly, in order to fix it, the rotating sleeve 18 is sleeved on the fixed shaft 19, and the second telescopic device 22 is fixedly connected to the fixed shaft 19 through a bracket, and the fixed shaft 19 always remains fixed.

[0064] A gear ring 1802 is fixed on the circular axis surface of the rotating sleeve 18, and the gear ring 1802 is meshed with the gear 20, and the gear 20 is connected to the output shaft of the self-locking motor through the input shaft 2001.

[0065] Depend on Figures 1 to 3 As shown, the storage box 1, rubber sample transfer mechanism, rubber sample holding assembly, compression control assembly, and compressed rubber sample transfer and measurement assembly are disposed within the housing 35. Both ends of the fixed shaft 19 are fixedly connected to the interior of the housing 35, and the storage box 1, rubber sample transfer mechanism, compression control assembly, and compressed rubber sample transfer and measurement assembly are fixedly connected to the inner wall of the housing 35 via brackets.

[0066] The input shaft 2001 is passed through the outside of the housing 35 and connected to the self-locking motor. The end of the air extraction pipe 3001 is passed through the outside of the housing 35 and connected to the air extraction pump.

[0067] A discharge port 3501 is provided below the housing 35, positioned directly below the compressed rubber sample transfer and measurement assembly. The lower portion of discharge port 3501 is connected to a drawer 37, which is slidably connected to the housing 35 via a slide rail 36. The rubber sample 5, after thickness measurement by the second grating 33, falls through discharge port 3501 into drawer 37.

[0068] A control panel 34 is provided on the housing 35. The control panel 34 adopts existing technology and is electrically connected to the electrically controlled first motor 3, linear module 7, first grating 9, first telescopic device 11, second telescopic device 22, second motor 23, third telescopic device 27, fourth telescopic device 32 and second grating 33. The connection relationship between them also adopts existing technology.

[0069] A loading port is provided at a position of the housing 35 corresponding to the storage box 1 for replenishing the rubber sample 5 into the storage box 1 , and a loading port sealing door 38 is detachably connected to the loading port.

[0070] To mark each rubber sample 5, a laser printer head 12 is located above the turning table 10. A QR code generator connected to the laser printer head 12 is located outside the housing 35. After the rubber sample 5 is moved onto the turning table 10, the QR code generator generates a QR code, which is then printed onto the rubber sample 5 via the laser printer head 12. Because the QR code occupies a small area, the thermal effects of laser printing on the properties of the rubber sample 5 are negligible.

[0071] The blanking box 28 is made of a transparent material and is provided with a QR code reader 29 on the outside of the blanking box 28. The QR code on the rubber sample 5 dropped to the bottom of the blanking box 28 is arranged opposite to the QR code reader 29. The QR code reader 29 can read the information of the QR code above and associate the relevant data to ensure the accuracy and traceability of the constant compression permanent set test data.

[0072] The fault tolerance mechanism of the QR code can ensure to a certain extent that even if the QR code is damaged, contaminated or deformed to a certain extent, it can still be correctly read. Therefore, the QR code on the compressed rubber sample 5 can be read.

[0073] Based on the above embodiment, the method for detecting the constant compression permanent deformation of the rubber sealing belt of the bridge expansion device is as follows:

[0074] The first push plate 6 moves to the rear end of the storage box 1. The support plate 2 lifts the rubber samples 5 inside the storage box 1, allowing one of the rubber samples 5 to move outside the storage box 1. The linear module 7 drives the first push plate 6 forward, and the rubber sample 5 moves across the horizontal platform 8 to the turning table 10. As it passes through the first grating 9, the first grating 9 detects the thickness of the rubber sample 5 and records the data in the system. The laser printer head 12 prints a QR code on the rubber sample 5 on the turning table 10. This QR code represents the serial number of the rubber sample 5 in the system, and the thickness data detected by the first grating 9 is correlated with this QR code.

[0075] After the rubber sample compression device, which needs to be loaded with the rubber sample 5, moves to the designated position, the turning table 10 rotates, causing the rubber sample 5 to slide onto the fixed plate 14. The rubber sample compression device continues to rotate. When it is aligned with the compression control assembly at the upper end, the sleeve 25 and the second motor 23 are activated, rotating the second screw 16. The extrusion plate 15 squeezes the rubber sample 5 to the set compression amount, which is 15%-25% of the original thickness. This time data is uploaded to the database corresponding to the corresponding QR code in the system, and the time value for unlocking the compression is automatically generated in the database based on the set compression duration.

[0076] When the unlocking time is reached, the rubber sample compression device rotates to directly above the compressed rubber sample transfer and measurement assembly. The compression control assembly below controls the movement of the extrusion plate 15, widening the gap between it and the fixed plate 14, and the rubber sample 5 falls into the discharge box 28. The QR code reader 29 reads the QR code on the rubber sample 5 and uploads it to the system for comparison with the QR code in the database.

[0077] After the rubber sample 5 has been left to stand for a period of time, it is transferred to the second grating 33 , which measures its thickness and uploads the thickness data and measurement time to the system.

[0078] Through recording and calculation, the data contained in the database of the same QR code in the system includes the initial thickness of the rubber sample 5, the time when the rubber sample 5 began to be compressed, the compression amount, the compression release time, the total compression time, the thickness measured after compression and static state, the measurement time, the static state time after compression, and the constant compression permanent deformation of the rubber sample 5.

[0079] Depend on Figures 1 to 17 As shown, a device for detecting the permanent deformation of the rubber sealing belt of a bridge expansion device includes a storage box 1, a rubber sample transfer mechanism, a rubber sample holding assembly, a compression control assembly, and a compressed rubber sample transfer and measurement assembly.

[0080] The above describes the implementation methods of the present application in detail in conjunction with the accompanying drawings, but the present application is not limited to the above implementation methods. Various changes can be made within the scope of knowledge possessed by ordinary technicians in the relevant technical field without departing from the purpose of the present application.

Claims

1. A device for detecting the permanent deformation of the rubber sealing belt of a bridge expansion device, characterized by: It comprises a storage box (1), a rubber sample transport mechanism, a rubber sample holding assembly, a compression control assembly, and a compressed rubber sample transport measurement assembly; The storage box (1) is open at the top and is used to stack and store a plurality of rubber samples (5). A support plate (2) is provided inside the storage box (1) for sliding, and the support plate (2) drives the rubber samples (5) to move upward. The rubber sample transfer mechanism is used to transfer the rubber sample (5) moved upward to the outside of the storage box (1) to the rubber sample holding assembly, and the rubber sample transfer mechanism includes a first grating (9) for detecting the thickness of the rubber sample (5) in an initial state; The rubber sample holding assembly includes a plurality of rubber sample compression devices distributed in a ring array around a rotating sleeve (18), and the rubber sample compression device includes a fixed plate (14) and an extrusion plate (15) slidably connected to the fixed plate (14). The fixed plate (14) is fixedly connected to the rotating sleeve (18) via a connecting rod (1801). The self-locking motor drives the rotating sleeve (18) to rotate. Through the rotation of the rotating sleeve (18), the rubber sample compression device is sequentially connected to the rubber sample transfer mechanism. The compression control assembly is used to adjust the distance between the extrusion plate (15) and the fixed plate (14); A threaded plate (1401) is provided on one side of the extrusion plate (15) facing away from the fixed plate (14), the threaded plate (1401) is fixedly connected to the fixed plate (14), a second screw rod (16) is threadedly connected to the threaded plate (1401), the second screw rod (16) is rotatably connected to the extrusion plate (15), and a first polygonal rod (17) is fixed to the end of the second screw rod (16); The compression control assembly is respectively arranged on the upper and lower sides of the rubber sample transport mechanism, and the compression control assembly includes a second motor (23) and a third telescopic device (27). The output shaft of the second motor (23) is connected to the second polygonal rod (24). A sleeve (25) is slidably provided on the second polygonal rod (24). The third telescopic device (27) controls the sliding of the sleeve (25). The sleeves (25) of the two compression control assemblies are arranged relative to the first polygonal rod (17) of the rubber sample compression device that rotates to the upper and lower ends. The compressed rubber sample transport and measurement assembly is arranged below the rubber sample holding assembly, and the compressed rubber sample (5) slides into the compressed rubber sample transport and measurement assembly. The thickness of the compressed rubber sample (5) is detected by the second grating (33) in the compressed rubber sample transport and measurement assembly. The thickness of the compressed rubber sample (5) is compared with the thickness of the rubber sample (5) in the initial state to obtain the value of the constant compression permanent deformation of the rubber sample (5); The rubber sample transfer mechanism includes a horizontal platform (8) and a turning platform (10), wherein the end of the turning platform (10) is rotatably connected to the horizontal platform (8), a linear module (7) is mounted above the horizontal platform (8), and a sliding portion of the linear module (7) is connected to a first push plate (6), and the first push plate (6) pushes the rubber sample (5) moved to the upper portion of the outside of the storage box (1) via the horizontal platform (8) to the turning platform (10); A rotating roller (1101) is provided at the bottom of the turning platform (10), and the bottom of the bracket of the roller (1101) is connected to the telescopic rod of the first telescopic device (11). The first telescopic device (11) controls the roller (1101) to move up and down, thereby driving the turning platform (10) to rotate; A plurality of air injection pipes (13) are provided at one end of the turning platform (10) away from the rubber sample holding assembly. The air injection pipes (13) are fixedly connected to the turning platform (10) in parallel. The air injection pipes (13) have their spray holes directed toward the rubber sample (5). The air injection pipes (13) are connected to the high-pressure air supply system through a main air inlet pipe. A laser printing head (12) is provided above the turning table (10), and a two-dimensional code generator connected to the laser printing head (12) is provided outside the turning table. After the rubber sample (5) moves to the turning table (10), the two-dimensional code generator generates a two-dimensional code, and prints the two-dimensional code onto the rubber sample (5) through the laser printing head (12); The compressed rubber sample transport and measurement assembly includes a blanking box (28) with an open top, the blanking box (28) is made of a transparent material, and a two-dimensional code reader (29) is provided on the outside of the blanking box (28). The two-dimensional code on the rubber sample (5) dropped to the bottom of the blanking box (28) is arranged relative to the two-dimensional code reader (29). The two-dimensional code reader (29) reads the information of the two-dimensional code above and associates the relevant data to ensure the accuracy and traceability of the constant compression permanent deformation test data; A discharge device is provided above the rubber sample compression device, the discharge device comprising a second push plate (21) and a second telescopic device (22) connected above the second push plate (21); a through slot (1402) is provided on the vertical surface of the L-shaped fixed plate (14); the slot (1402) is arranged corresponding to the second push plate (21); when the extrusion plate (15) opens a certain gap, the second push plate (21) passes through the slot (1402) into the interior of the rubber sample compression device, pushing the rubber sample (5) to fall; The upper end of the material box (28) is open and located directly below the rubber sample compression device arranged vertically below. An opening is provided on the bottom side wall of the material box (28). The size of the opening is greater than or equal to the size of the rubber sample (5) after compression. A suction cup (30) is provided at the opening. The end of the suction cup (30) facing away from the material box (28) is connected to a fourth telescopic device (32) through a horizontal rod. The second grating (33) is horizontally arranged on both sides of the path along which the suction cup (30) drives the rubber sample (5) to move backward.

2. The device for detecting the permanent compression deformation of the rubber sealing strip of a bridge expansion device according to claim 1, characterized in that: The side wall of the storage box (1) is provided with a vertically arranged slideway (101), and the end surface of the support plate (2) is convexly provided with a slider (201), the slider (201) is slidably arranged inside the slideway (101), and the slider (201) that passes through the outside of the storage box (1) is threadedly connected to a first screw rod (4), and the end of the vertically arranged first screw rod (4) is connected to a first motor (3), and the first motor (3) is fixedly connected to the storage box (1).

3. The device for detecting the permanent compression deformation of the rubber sealing strip of a bridge expansion device according to claim 1, characterized in that: The sleeve (25) is arranged horizontally, the first polygonal rod (17) of the rubber sample compression device rotated to the upper and lower ends is arranged horizontally, and the fixing plate (14) and the extrusion plate (15) are arranged vertically.

4. The device for detecting the permanent compression deformation of the rubber sealing strip of a bridge expansion device according to claim 3, characterized in that: The suction cup (30) is an air suction cup, and the suction cup (30) is connected to the fourth telescopic device (32) via an air suction pipe (3001), and the air suction pipe (3001) is connected to an air suction pump via an external air pipe (31).

5. A device for detecting the permanent compression deformation of a rubber sealing strip of a bridge expansion device according to any one of claims 1 to 4, characterized in that: The storage box (1), the rubber sample transfer mechanism, the rubber sample holding assembly, the compression amount control assembly, and the compressed rubber sample transfer measurement assembly are arranged inside the housing (35).

6. The device for detecting the permanent compression deformation of the rubber sealing strip of a bridge expansion device according to claim 5, characterized in that: A discharge port (3501) is provided below the housing (35), and the discharge port (3501) is arranged directly below the compressed rubber sample transfer and measurement assembly. The discharge port (3501) is connected to the drawer (37) below, and the drawer (37) is slidably connected to the housing (35) via a slide rail (36).

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