A device and method for synchronously immersing a cyclic immersion test sample into water

Abstract

The application discloses a kind of periodic infiltration test sample synchronous water entry device and method, including rack box body, the rack box body is detachably installed water storage tank in, test sample bearing assembly is provided on the rack box body, the test sample bearing assembly includes synchronous support plate and the guide slide rail connected with the synchronous support plate, the synchronous support plate can be moved up / down along the guide slide rail along longitudinal direction, multiple test sample installation stations are evenly distributed in matrix on the synchronous support plate along the transverse direction of the synchronous support plate, each test sample installation station is installed fixed component, each test sample installation station one-to-one fixed component, further include drive assembly, the drive assembly includes servo motor and reduction box connected with guide slide rail, the control of rotation speed and stroke is realized.

Description

Technical Field

[0001] This invention belongs to the field of material corrosion testing technology, specifically relating to a device and method for synchronously immersing samples in water during periodic immersion tests. Background Technology

[0002] In fields such as material corrosion testing, cyclic immersion testing is a core method for simulating material performance changes under alternating wet and dry environments. Traditional cyclic immersion devices often employ single suspension or fixation of samples, which can lead to issues such as attitude shifts, asynchronous immersion, and poor immersion uniformity during water entry. This results in large data dispersion, failing to accurately reflect the actual service condition of the material. Especially in parallel testing scenarios with multiple samples, differences in immersion timing and immersion degree between individual samples severely impact the reliability and comparability of test results.

[0003] In view of the above factors, a device and method for synchronously immersing test specimens in water during periodic immersion tests are provided, which effectively ensures the consistency of parallel tests, reduces the dispersion of test data, and enables more accurate and efficient material corrosion testing to obtain reliable material corrosion performance data. Summary of the Invention

[0004] The purpose of this invention is to provide a device and method for synchronously immersing samples in water during periodic immersion tests, so as to solve the problems mentioned in the background art.

[0005] The objective of this invention is achieved through the following technical solution: a device for synchronous water immersion of periodic immersion test specimens, comprising a frame housing, a water storage tank being detachably installed inside the frame housing, a specimen carrying assembly being provided on the frame housing, the specimen carrying assembly comprising a synchronous support plate and a guide rail connected to the synchronous support plate, the synchronous support plate being able to move longitudinally up / down along the guide rail;

[0006] The synchronous tray is provided with multiple sample installation stations evenly distributed in a matrix along the transverse direction of the synchronous tray. Each sample installation station is equipped with a fixing component, and each sample installation station corresponds to a fixing component.

[0007] It also includes a drive assembly, which includes a servo motor and a gearbox connected to the guide rail to control the speed and stroke.

[0008] Furthermore, the guide rail adopts a dual-axis linear guide rail, and the guide rail includes two sets of symmetrically arranged lead screw groups. Each set of lead screw groups is provided with a movable nut. The movable nut is convex in shape and is provided with a threaded channel to cooperate with the lead screw group.

[0009] The movable nut is detachably connected to a timing plate near its inner end face.

[0010] Furthermore, the movable nut and the synchronous support plate are detachably connected by bolts, and the sample mounting station frame is detachably connected to the synchronous support plate.

[0011] The synchronous support plate has a concave cross-section and a through bottom. A sample installation station frame is bolted to the synchronous support plate. The sample installation station frame includes convex positioning blocks arranged symmetrically on both sides. The positioning blocks are bolted to the synchronous support plate. A transverse support plate is fixed between the two symmetrical positioning blocks. The transverse support plate has a sample installation station hole.

[0012] Furthermore, the fixing assembly installed at each of the sample installation stations includes a positioning frame and a transverse guide rail disposed on the positioning frame. A first clamp and a second clamp are movably connected on the transverse guide rail. The first clamp and the second clamp are symmetrically arranged. The first clamp and the second clamp are fixedly disposed on a connecting frame. The connecting frame is located at the rear end of the positioning frame and is connected to the lead screw via a lead screw nut.

[0013] The lead screw is configured in two opposing sections, with a connecting wheel in the middle. The connecting wheel is connected to the output end of the output motor via a transmission belt.

[0014] The two ends of the lead screw are rotatably connected to bearing seats at both ends, and the bearing seats are connected to the positioning frame by bolts.

[0015] Furthermore, the connecting frame connected to the first clamp and the second clamp includes an L-shaped bracket, on which the first clamp and the second clamp are fixedly connected. The first clamp and the second clamp have trapezoidal grooves or V-shaped groove structures on their opposite surfaces, and the whole is a hollow structure. Several through holes are opened on the first clamp and the second clamp.

[0016] The bracket extends downwards at least 200mm beyond the bottom end face of the positioning frame;

[0017] The lower ends of the first and second clamps are fixedly provided with limiting edges for contact and limiting engagement with the test specimen.

[0018] Furthermore, the frame housing and the water storage tank are detachably connected by bolts. A liquid level sensor is installed in the water storage tank. The liquid level sensor is connected to a PLC controller via a connecting wire. The PLC controller is electrically connected to a water pump. One end of the water pump is connected to the liquid supply end, and the other end is connected to the water storage tank.

[0019] Furthermore, a temperature sensor is also installed in the water storage tank. The temperature sensor is electrically connected to a temperature controller, which is electrically connected to a relay connected to the electric heating tube. When the water temperature in the water storage tank is lower than the set temperature, the temperature controller outputs a signal to the relay coil, which is energized and activates to control the heating tube to heat. When the water temperature in the water storage tank reaches the set temperature, the temperature controller stops outputting the signal, the relay coil is de-energized, and the heating tube is de-energized and stops heating.

[0020] Furthermore, the water storage tank is also equipped with an overflow trough and a drain valve. The overflow trough is located at the top of the water storage tank, and the drain valve is installed at the bottom of the water storage tank.

[0021] Furthermore, a hot air pipe box is fixedly installed inside the frame housing, and several hot air pipes are connected to the hot air pipe box, with each hot air pipe having a wide-mouth structure at its end.

[0022] The end of each of the hot air ducts is positioned relative to the initial position of the fixing assembly;

[0023] The bottom of the rack housing is equipped with casters, and an exhaust vent is opened on the side end face of the rack housing opposite to the hot air duct box.

[0024] The application method of the synchronous water immersion device for periodic immersion test samples includes the following steps:

[0025] Parameter settings: The immersion cycle, water depth, lifting speed and test liquid temperature parameters can be preset through the touch screen of the PLC controller;

[0026] Sample installation: The sample to be tested is installed on the fixing component of the synchronous support plate and fixed with the help of anti-slip rubber pads to ensure that the sample is vertical.

[0027] Liquid preparation: Inject the test liquid into the water tank, adjust the initial liquid level through the drain valve, activate the temperature sensor and adjust the liquid temperature to the preset range;

[0028] Water level calibration: The liquid level sensor monitors the water level in the storage tank in real time. When the water level is lower than the set value, the automatic water replenishment is started to replenish the water in the storage tank. When the water level is higher than the set value, the water is drained through the overflow tank to maintain a constant water level.

[0029] Synchronous water entry: The drive component is started and electrically connected to the PLC controller. The PLC controller controls the drive component to synchronously drive the synchronous tray to descend at a uniform speed along the guide rail, so that the bottom of all samples can contact the water surface at the same time.

[0030] Cyclic cycle: After the sample has been immersed for the set time, the synchronous tray rises at a constant speed to complete the drainage. The above water immersion-immersion-drainage process is repeated until the test is over. The immersion cycle can be adjusted from 10s to 24h, the water immersion depth can be adjusted from 0 to 200mm, and the test liquid temperature can be adjusted from 5 to 60℃. After the test, the test liquid can be quickly drained through the drain valve for easy equipment cleaning.

[0031] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0032] This invention uses a PLC controller and a touch screen to achieve precise presetting and real-time monitoring of immersion cycle, water depth, lifting speed, and temperature. It can automatically maintain a constant water level, greatly improve the control accuracy of test parameters, and ensure the reliability of test results. The water storage tank is equipped with an overflow tank and a drain valve, which can quickly replace the test liquid and is easy to clean after the test.

[0033] This invention uses a drive component to move the sample-bearing component up and down in a reciprocating motion, combined with a uniformly positioned sample clamping design, to enable multiple samples to simultaneously contact the water surface and complete the cyclical process of immersion and drainage. It can be widely applied in parallel testing scenarios involving multiple samples, such as material corrosion testing and durability assessment, improving the reliability and comparability of test data. Attached Figure Description

[0034] Figure 1 This is a three-dimensional schematic diagram of the frame housing of the present invention;

[0035] Figure 2 This is a schematic diagram of the interior of the frame housing of the present invention;

[0036] Figure 3 This is the present invention. Figure 2 A plan view;

[0037] Figure 4 This is a schematic diagram of the connection between the position sensor and the PLC controller of the present invention;

[0038] Figure 5 This is a schematic diagram showing the connection between the temperature sensor and the temperature controller of the present invention;

[0039] Figure 6 This is a schematic diagram of the hot air duct box of the present invention in planar installation;

[0040] Figure 7 This is a schematic diagram showing the connection between the synchronous support plate and the sample mounting station frame of the present invention;

[0041] Figure 8 This is a schematic diagram of the connection between the synchronous support plate and the movable nut of the present invention;

[0042] Figure 9 This is a three-dimensional schematic diagram of the fixing component of the present invention;

[0043] Figure 10 This is the present invention. Figure 9 Rear view diagram;

[0044] Figure 11 This is an enlarged schematic diagram of the first and second clamps of the present invention;

[0045] Figure 12 This is a schematic diagram of the first and second clamps of the present invention having slots;

[0046] Figure 13 This is a schematic diagram of the connection between the hot air duct box and the hot air pipe of the present invention;

[0047] Figure 14 This is a side view schematic diagram of the connection between the hot air duct box and the hot air pipe of the present invention;

[0048] Figure 15 This is a schematic diagram showing the hot air duct and the fixed component relative to each other in this invention. Detailed Implementation

[0049] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0050] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0051] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0052] like Figure 1-15As shown, a synchronous water immersion device for periodic immersion test samples includes a frame housing 1, with a hinged double door connected to the frame housing 1. A water storage tank 2 is detachably installed inside the frame housing 1. A sample carrying assembly 3 is provided on the frame housing 1. The sample carrying assembly 3 includes a synchronous support plate 4 and a guide rail 5 connected to the synchronous support plate 4. The synchronous support plate 4 can move longitudinally up / down along the guide rail 5.

[0053] Multiple sample installation stations 6 are evenly distributed in a matrix along the transverse direction of the synchronous tray 4. Each sample installation station 6 is equipped with a fixing component 7, and each sample installation station 6 corresponds to a fixing component 7.

[0054] It also includes a drive component 8, which includes a servo motor and a reduction gearbox 9 connected to the guide rail 5 to realize the control of speed and stroke.

[0055] To facilitate the smooth lifting and lowering of the synchronous support plate by using a ball screw in conjunction with a biaxial linear guide rail during use, ensuring that all samples enter and drain water synchronously, effectively guaranteeing the consistency of parallel tests and reducing the dispersion of test data, the guide rail 5 adopts a biaxial linear guide rail. The guide rail 5 includes two sets of symmetrically arranged screw groups 10. Each set of screw groups 10 is provided with a movable nut 11. The movable nut 11 is convex in shape and is provided with a threaded channel 12 to cooperate with the screw group 10.

[0056] The movable nut 11 is detachably connected to the synchronous support plate 4 near the inner end face of the movable nut 11.

[0057] To ensure the stability of the fixed component 8 during use, the movable nut 11 and the synchronous support plate 4 are detachably connected by bolts, and the sample installation station frame 13 is detachably connected to the synchronous support plate 4.

[0058] The synchronous support plate 4 has a concave cross-section and its bottom is open. The sample mounting station frame 13 is bolted to the synchronous support plate 4. The sample mounting station frame 13 includes convex positioning blocks 14 symmetrically arranged on both sides. The positioning blocks 14 are bolted to the synchronous support plate 4. A transverse support plate 15 is fixed between the two symmetrical positioning blocks 4. The transverse support plate 15 has a sample mounting station hole 16 fixed on it.

[0059] To facilitate the fixing of the sample by the fixing components during use, each sample mounting station 16 is equipped with a fixing component 8 including a positioning frame 17 and a transverse guide rail 18 disposed on the positioning frame 17. A first clamp 19 and a second clamp 20 are movably connected to the transverse guide rail 18. The first clamp 19 and the second clamp 20 are symmetrically arranged. The first clamp 19 and the second clamp 20 are fixedly disposed on a connecting frame. The connecting frame is located at the rear end of the positioning frame 17 and is connected to the lead screw 22 by a lead screw nut 21.

[0060] The lead screw 22 is configured in two opposite directions, and a connecting wheel 23 is provided in the middle of the lead screw 22. The connecting wheel 23 is connected to the output end of the output motor through a transmission belt.

[0061] The two ends of the lead screw 22 are rotatably connected to the bearing seats 24 at both ends, and the bearing seats 24 are connected to the positioning frame 17 by bolts. The positioning frame 17 has a limit groove on its upper end face, and the limit groove cooperates with the limit block at the bottom of the bracket (the limit block is not shown in the contact position diagram between the positioning frame and the bracket).

[0062] A positioning rod is fixedly connected to the positioning frame of the fixing component 8. The upper end of the positioning rod has a threaded section, and the threaded section of the positioning rod is fixed in the sample installation position hole 16 fixedly opened on the transverse support plate 15 by a nut.

[0063] The first clamp 19 and the second clamp 20 are respectively set on two sets of symmetrical supports. Under the action of the output motor, the transmission belt connecting the output motor and the connecting wheel 23 rotates, thereby driving the lead screw 22 to rotate. Since the lead screw 22 is set with opposite ends, it controls the opening and closing of the first clamp 19 and the second clamp 20. The output motor on each positioning frame is connected to a PLC controller, and the rotation of each output motor is independently controlled by the PLC controller. In the use state, the first clamp 19 and the second clamp 20 are immersed in the test liquid, while the area where the positioning frame 17 is located is not immersed in the test liquid.

[0064] The PLC controller features a touchscreen interface. It allows users to preset the immersion cycle, water depth, and lifting speed. The touchscreen interface enables visualized parameter settings and status monitoring.

[0065] To facilitate clamping and fixing of the sample during use, the connecting frame connected to the first clamp 19 and the second clamp 20 includes an L-shaped bracket 25. The first clamp 19 and the second clamp 20 are fixedly connected to the bracket 25. The first clamp 19 and the second clamp 20 have trapezoidal grooves or V-shaped groove structures on their opposite surfaces, and the whole structure is hollow. Several through holes are opened on the first clamp 19 and the second clamp 20. The through holes can better improve the wetting effect of the sample.

[0066] Among them, the bracket 25 is connected to the lead screw nut 21 at the rear end of the positioning frame 17 via a connecting rod (the connecting rod and the bracket 25 are bolted together) that is parallel to the positioning frame 17, and the lead screw nut 21 cooperates with the lead screw 22.

[0067] The bracket 25 extends downward beyond the bottom end face of the positioning frame 17 by at least 200 mm;

[0068] The first clamp 19 and the second clamp 20 are provided with anti-slip rubber pads on their opposing surfaces. The anti-slip rubber pads can prevent damage to the sample surface and meet the testing requirements of various types of materials. The anti-slip rubber pads have through holes that are coaxial with several through holes opened on the first clamp 19 and the second clamp 20.

[0069] The lower ends of the first clamp 19 and the second clamp 20 are fixedly provided with limiting edges 26 for contact and limiting engagement with the test specimen.

[0070] The first clamp 19 and the second clamp 20 described above can not only clamp cylindrical samples, but also plate-shaped samples. When clamping and fixing plate-shaped samples, mounting grooves are provided on the end faces of the first clamp 19 and the second clamp 20. The mounting grooves are through, and mounting grooves with different spacing sizes are provided on the mounting grooves. The mounting grooves are located on the opposite surfaces of the first clamp 19 and the second clamp 20.

[0071] In order to monitor the liquid level in the water storage tank 2 during use, and to control the water pump 29 to replenish the liquid lost through evaporation in a timely manner through the PLC controller 28, the frame housing 1 and the water storage tank 2 are detachably connected by bolts. A liquid level sensor 27 is installed in the water storage tank 2. The liquid level sensor 27 is connected to the PLC controller 28 through a connecting wire. The PLC controller 28 is electrically connected to the water pump 29. One end of the water pump 29 is connected to the liquid supply end 30, and the other end is connected to the water storage tank 2.

[0072] To heat the test liquid by energizing the heating element during operation, a temperature sensor 31 is installed inside the water storage tank 2. The temperature sensor 31 is electrically connected to a temperature controller 32, which in turn is electrically connected to a relay connected to the heating element. When the water temperature in the storage tank 2 is lower than the set temperature, the temperature controller 32 outputs a signal to the relay coil, energizing it and controlling the heating element to begin heating. When the water temperature in the storage tank 2 reaches the set temperature, the temperature controller 32 stops outputting a signal, the relay coil de-energizes, and the heating element stops heating. This connection between the relay and the heating element is a feature not present in existing technology for water storage tanks. The temperature sensor, located inside the water storage tank, monitors the test liquid temperature in real time, and the temperature controller can be set within a temperature range and automatically adjust accordingly.

[0073] In use, by setting an overflow trough 33 and a drain valve 34, when injecting test liquid into the water storage tank, the initial liquid level is adjusted by the drain valve. The water storage tank 2 is also provided with an overflow trough 33 and a drain valve 34. The overflow trough 33 is located at the upper part of the water storage tank 2, and the drain valve 34 is installed at the bottom of the water storage tank 2.

[0074] The overflow trough 33 is provided above. During use, the water level in the storage tank is monitored in real time by a liquid level sensor. When the water level is lower than the set value, water replenishment is automatically started. When the water level is higher than the set value, water is drained through the overflow trough to maintain a constant water level. The overflow trough extends to the outside of the storage tank 2 through a connecting pipe and passes through the frame box 1 to connect with the liquid supply end that holds the test liquid.

[0075] In use, the impregnated sample is dried by setting up a hot air pipe 36. A hot air tube box 35 is fixedly installed inside the frame housing 1. Several hot air pipes 36 are connected to the hot air tube box 35. The end of each hot air pipe 36 has a wide-mouth structure.

[0076] Heating lamps can also be installed on the top wall of the frame housing 1 for drying heating.

[0077] Each of the hot air ducts 36 has its end facing the initial position of the fixing component 8; wherein each of the hot air ducts 36 can be snapped onto a limiting plate with grooves arranged in a matrix, the two ends of the limiting plate being fixed to the frame housing 1, and the hot air ducts 36 adopt a straight pipe structure or a flexible gooseneck pipe structure.

[0078] The bottom of the frame housing 1 is equipped with casters, and an exhaust port 37 is opened on the side end face of the frame housing 1 opposite to the hot air pipe box 35.

[0079] In the above setup, a fan can be used to accelerate the evaporation of moisture on the sample by relying on air flow. In use, the air flow is accelerated by a fan in the hot air box 35, and the fan is rotated by a PLC controller.

[0080] A method for applying a device for synchronously immersing samples in water during a periodic immersion test includes the following steps:

[0081] Parameter settings: The immersion cycle, water depth, lifting speed and test liquid temperature parameters can be preset through the touch screen of the PLC controller;

[0082] Sample installation: The sample to be tested is installed on the fixing component of the synchronous support plate and fixed with the help of anti-slip rubber pads to ensure that the sample is vertical.

[0083] Liquid preparation: Inject the test liquid into the water tank, adjust the initial liquid level through the drain valve, activate the temperature sensor and adjust the liquid temperature to the preset range;

[0084] Water level calibration: The liquid level sensor monitors the water level in the storage tank in real time. When the water level is lower than the set value, the automatic water replenishment is started to replenish the water in the storage tank. When the water level is higher than the set value, the water is drained through the overflow tank to maintain a constant water level.

[0085] Synchronous water entry: The drive component is started and electrically connected to the PLC controller. The PLC controller controls the drive component to synchronously drive the synchronous tray to descend at a uniform speed along the guide rail, so that the bottom of all samples can contact the water surface at the same time.

[0086] Cyclic cycle: After the sample is kept in the set immersion time, the synchronous tray rises at a constant speed to complete the drainage. The above water immersion-drainage process is repeated until the test ends. The immersion cycle can be adjusted from 10s to 24h, the water immersion depth can be adjusted from 0 to 200mm, and the test liquid temperature can be adjusted from 5 to 60℃. After the test, the test liquid can be quickly drained through the drain valve for easy equipment cleaning. The drain valve is connected to the PLC controller.

[0087] Using the above method, the target water level was set to 100 mm, the immersion depth to 80 mm, and the immersion cycle to 30 s (20 s immersion, 10 s drying). A total of 1000 test cycles were conducted. A synchronous support plate smoothly and synchronously immersed and exited the water. A level sensor monitored the water level in real time, automatically replenishing the liquid lost through evaporation. Water level fluctuations were consistently controlled within ±1.5 mm. After the test, the corrosion degree of the five samples was uniform, and the test data dispersion was ≤3%, significantly better than the test results of traditional equipment (dispersion ≥8%), demonstrating the good synchronization and stability of this mechanism.

[0088] Polymer and ceramic samples were selected using the above method and fixed to the synchronous tray using the same set of adjustable clamps. The target water level was set to 150 mm, the water immersion depth to 120 mm, the immersion cycle to 60 s (immersion for 40 s and drying for 20 s), and the total test cycle was 500 times.

[0089] During the test, the samples were securely installed, the synchronous support plate rose and fell smoothly without tilting, and samples of different sizes were accurately and synchronously immersed in water, with the water level remaining constant throughout. After the test, the surface wetting performance test data of the two types of samples were stable, proving that the adaptability of this device meets the testing requirements of multiple sample sizes.

[0090] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0091] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A device for synchronously immersing samples in water during a periodic immersion test, characterized in that: The device includes a frame housing (1), in which a water storage tank (2) is detachably installed. A sample carrying assembly (3) is provided on the frame housing (1). The sample carrying assembly (3) includes a synchronous support plate (4) and a guide rail (5) connected to the synchronous support plate (4). The synchronous support plate (4) can move along the guide rail (5) in the longitudinal direction / up and down. Multiple sample installation stations (6) are evenly distributed in a matrix along the transverse direction of the synchronous tray (4). Each sample installation station (6) is equipped with a fixing component (7), and each sample installation station (6) corresponds to a fixing component (7). It also includes a drive assembly (8), which includes a servo motor and a gearbox (9) connected to the guide rail (5) to realize the control of speed and stroke.

2. The device for synchronously immersing test specimens in water according to claim 1, characterized in that: The guide rail (5) adopts a dual-axis linear guide rail. The guide rail (5) includes two sets of symmetrically arranged lead screw groups (10). Each set of lead screw groups (10) is provided with a movable nut (11). The movable nut (11) is convex in shape and is provided with a threaded channel (12) to cooperate with the lead screw group (10). The movable nut (11) is detachably connected to the synchronous support plate (4) on the inner end face of the movable nut (11).

3. The device for synchronously immersing test specimens in water according to claim 2, characterized in that: The movable nut (11) and the synchronous support plate (4) are detachably connected by bolts, and the sample installation station frame (13) is detachably connected to the synchronous support plate (4). The cross-section of the synchronous tray (4) is U-shaped, and the bottom of the synchronous tray (4) is through. The sample installation station frame (13) is connected to the synchronous tray (4) by bolts. The sample installation station frame (13) includes symmetrically arranged convex positioning blocks (14) on both sides. The positioning blocks (14) are connected to the synchronous tray (4) by bolts. A transverse support plate (15) is fixed between the two symmetrical positioning blocks (4). The transverse support plate (15) has a sample installation station hole (16) fixed on it.

4. The device for synchronously immersing test specimens in water according to claim 3, characterized in that: The fixing component (8) installed on each of the sample installation stations (16) includes a positioning frame (17) and a transverse guide rail (18) set on the positioning frame (17). A first clamp (19) and a second clamp (20) are movably connected on the transverse guide rail (18). The first clamp (19) and the second clamp (20) are symmetrically arranged. The first clamp (19) and the second clamp (20) are fixedly set on a connecting frame. The connecting frame is located at the rear end of the positioning frame (17) and is connected to the lead screw (22) through a lead screw nut (21). The lead screw (22) is configured in two opposite directions, and a connecting wheel (23) is provided in the middle of the lead screw (22). The connecting wheel (23) is connected to the output end of the output motor through a transmission belt. The two ends of the lead screw (22) are rotatably connected to the bearing seats (24) at both ends, and the bearing seats (24) are connected to the positioning frame (17) by bolts.

5. The device for synchronously immersing test specimens in water according to claim 4, characterized in that: The connecting frame connected to the first clamp (19) and the second clamp (20) includes an L-shaped bracket (25), on which the first clamp (19) and the second clamp (20) are fixedly connected. The first clamp (19) and the second clamp (20) have trapezoidal grooves or V-shaped groove structures on their opposite surfaces, and the whole is a hollow structure. Several through holes are opened on the first clamp (19) and the second clamp (20). The bracket (25) extends downward beyond the bottom end face of the positioning frame (17) by at least 200 mm; The lower ends of the first fixture (19) and the second fixture (20) are fixedly provided with limiting edges (26) for contact limiting fit with the test specimen.

6. The device for synchronously immersing test specimens in water according to claim 5, characterized in that: The frame housing (1) and the water storage tank (2) are detachably connected by bolts. A liquid level sensor (27) is installed in the water storage tank (2). The liquid level sensor (27) is connected to the PLC controller (28) through a connecting line. The PLC controller (28) is electrically connected to the water pump (29). One end of the water pump (29) is connected to the liquid supply end (30), and the other end is connected to the water storage tank (2).

7. The device for synchronous water immersion of periodic immersion test specimens according to claim 6, characterized in that: A temperature sensor (31) is also installed in the water storage tank (2). The temperature sensor (31) is electrically connected to a temperature controller (32). The temperature controller (32) is electrically connected to a relay connected to the electric heating tube. When the water temperature in the water storage tank (2) is lower than the set temperature, the temperature controller (32) outputs a signal to the relay coil to energize and activate the heating tube to heat it. When the water temperature in the water storage tank (2) reaches the set temperature, the temperature controller (32) stops outputting the signal, the relay coil is de-energized and disconnects, and the heating tube is de-energized and stops.

8. The device for synchronously immersing test specimens in water according to claim 7, characterized in that: The water storage tank (2) is also provided with an overflow tank (33) and a drain valve (34). The overflow tank (33) is located at the top of the water storage tank (2), and the drain valve (34) is installed at the bottom of the water storage tank (2).

9. The device for synchronously immersing test specimens in water according to claim 8, characterized in that: A hot air pipe box (35) is fixedly installed inside the frame housing (1). Several hot air pipes (36) are connected to the hot air pipe box (35), and the end of each hot air pipe (36) is a wide-mouth structure. The end of each of the hot air ducts (36) is positioned relative to the initial position of the fixing assembly (8); The bottom of the rack housing (1) is provided with casters, and an exhaust port (37) is opened on the side end face of the rack housing (1) opposite to the hot air pipe box (35).

10. The application method of the synchronous water immersion device for periodic immersion test specimens according to claim 9, characterized in that: Includes the following steps: Parameter settings: The immersion cycle, water depth, lifting speed and test liquid temperature parameters can be preset through the touch screen of the PLC controller; Sample installation: The sample to be tested is installed on the fixing component of the synchronous support plate and fixed with the help of anti-slip rubber pads to ensure that the sample is vertical. Liquid preparation: Inject the test liquid into the water tank, adjust the initial liquid level through the drain valve, activate the temperature sensor and adjust the liquid temperature to the preset range; Water level calibration: The liquid level sensor monitors the water level in the storage tank in real time. When the water level is lower than the set value, the automatic water replenishment is started to replenish the water in the storage tank. When the water level is higher than the set value, the water is drained through the overflow tank to maintain a constant water level. Synchronous water entry: The drive component is started and electrically connected to the PLC controller. The PLC controller controls the drive component to synchronously drive the synchronous tray to descend at a uniform speed along the guide rail, so that the bottom of all samples can contact the water surface at the same time. Cyclic cycle: After the sample has been immersed for the set time, the synchronous tray rises at a constant speed to complete the drainage. The above water immersion-immersion-drainage process is repeated until the test is over. The immersion cycle can be adjusted from 10s to 24h, the water immersion depth can be adjusted from 0 to 200mm, and the test liquid temperature can be adjusted from 5 to 60℃. After the test, the test liquid can be quickly drained through the drain valve for easy equipment cleaning.

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