Hydraulic coupling anchor rod corrosion testing device

Abstract

The utility model discloses a hydraulic coupling anchor rod corrosion testing device which comprises a constant temperature and humidity chamber, a water circulation system, an anchor rod stress strain monitoring system, a video monitoring system and a data collecting and monitoring system, and the data collecting and monitoring system comprises a computer data collector located on one side of the constant temperature and humidity chamber. The computer data collector is respectively connected with the video monitoring system, the anchor rod stress strain monitoring system, the water circulation system and the constant temperature and humidity chamber. The hydraulic coupling-corrosion effect of the anchor rod in a roadway can be effectively reproduced in a laboratory, the degradation process of the anchor rod can be conveniently observed and researched, the corrosion change of the anchor rod is more emphasized, the corrosion process is not accelerated by using a special means, corrosion degradation is carried out at a natural speed as much as possible, novel corrosion monitoring means such as humidity, temperature and water flow are added, and the monitoring accuracy is improved. The corrosion means of flowing water capable of being sprayed and soaked is provided, and most of test means needed in the research of the corrosion degradation mechanism of the anchor rod under the hydraulic coupling effect are met.

Description

Technical Field

[0001] The utility model relates to the technical field of anchor rod testing, in particular to a hydraulic coupling anchor rod corrosion testing device. Background Art

[0002] Ensuring roadway stability is one of the most important aspects of safe coal mine production. Roadway stability primarily relies on various forms of support. Currently, mining companies typically use anchor bolts to support the roadway's surrounding rock. Anchor bolts are generally made of metal, with threaded steel bars being the most common. However, some roadways in my country experience water dripping and weeping. This water dripping and weeping, particularly in water-rich and dripping roadways, can easily cause metal anchor bolts to rust, reducing their support strength and ultimately leading to failure of the roadway's surrounding rock within the anchoring range. Therefore, studying the degradation of anchor bolts due to hydraulic coupling is of great significance.

[0003] The groundwater stored around water-rich and dripping tunnels is generally fissure water, but most of the existing research equipment can only consider the corrosion effect of one water storage state, or even water corrosion alone, and cannot fully consider the dynamic water and hydraulic coupling effects.

[0004] Among them, the patent publication number CN115575239A, entitled "A device and method for testing the anchoring performance of a rod under water spraying conditions," specifically discloses that "the invention includes a test system, a water spraying system, and an anchoring force test system. The test system includes a test bench and a test box. The invention realizes the anchoring performance of the rod under water spraying conditions, and the pull-out test of the rod is an in-situ test. Moreover, the degree of influence of different water spraying times on the anchoring performance of the rod to be tested can be tested by changing the water spraying time." However, the invention only simulates the impact of dynamic water spraying, and the fissure water in the formation will contain salt, alkali, and acidic substances. It is inappropriate to use only ordinary laboratory water.

[0005] Among them, the patent publication number CN219915132U, entitled "An accelerated corrosion test device for anchor rods under tensile stress," specifically discloses that "it includes three main parts: a stress loading device, an accelerated corrosion device, and a corrosion detection device. It can monitor the stress relaxation phenomenon of the anchor rod under tensile corrosion in real time, accurately control the tensile stress, and stabilize the concentration of the corrosion solution and record the corrosion data in real time, which is beneficial to the mechanism research of anchor rod durability research." However, the patent focuses on monitoring the corrosion status and does not take into account the corrosion status and changes of the anchor rod. In addition, deep rocks are also affected by high ground temperatures. This full-immersion corrosion method not only cannot flow but also cannot take into account temperature changes. The design is flawed.

[0006] Among them, the patent publication number is CN112763403A, and the patent name is an existing patent document of an anchor loading-corrosion test device and method based on the coupling of load and corrosion. It specifically discloses "including a base, a static load loading device, a dynamic load loading device, a corrosion tank, and a monitoring device, and provides an anchor loading-corrosion test method based on the coupling of load and corrosion, including the steps of making a test piece, installing a test device, applying a static load, injecting liquid into the corrosion tank, applying a dynamic load and monitoring data, so as to achieve the simulation of the complex environment in which the support anchor in the coal mine tunnel bears the anchoring constant load and blasting dynamic load for a long time and suffers from mine water corrosion. Through relevant monitoring, the damage mechanism of the anchor structure is analyzed, and the durability of the anchor is evaluated." However, this patent mainly focuses on the monitoring of different forces and corrosion effects of the anchor body, but the monitoring of the changes in the anchor performance during the corrosion process is not in place, and the impact of high ground temperature is not fully considered. Utility Model Content

[0007] The technical problem to be solved by the utility model is: how to provide a comprehensive multifunctional testing equipment which can simultaneously meet the requirements of hydraulic coupling, dynamic and static water pressure, monitoring of anchor rod corrosion state and strength determination.

[0008] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0009] A hydraulic coupling anchor corrosion testing device, comprising:

[0010] A constant temperature and humidity chamber, wherein a temperature and humidity detector and a metal heating wire are installed inside the constant temperature and humidity chamber, and a plurality of anchor rods are vertically installed inside the constant temperature and humidity chamber;

[0011] The water circulation system includes a water tank installed on one side of the constant temperature and humidity chamber, a heater and a water pressure pump are arranged inside the water tank, and the water pressure pump connects the water tank with the constant temperature and humidity chamber through a water outlet pipe;

[0012] Anchor bolt stress and strain monitoring system, including a fiber optic detector installed on the anchor bolt and anchor bolt dynamometers installed at the upper and lower ends of the anchor bolt;

[0013] The video surveillance system includes miniature waterproof cameras installed at four corners inside the constant temperature and humidity chamber;

[0014] The data collection and monitoring system includes a computer data collector located on one side of the constant temperature and humidity chamber. The computer data collector is respectively connected to the video monitoring system, the anchor stress and strain monitoring system, the water circulation system and the constant temperature and humidity chamber.

[0015] This application can effectively reproduce the hydraulic coupling-corrosion effect on anchor rods in tunnels in the laboratory, and can conveniently observe and study the deterioration process of anchor rods. Unlike existing related experimental equipment, this application pays more attention to the corrosion changes of anchor rods, does not use special means to accelerate the corrosion process, and corrodes and degrades at a natural rate as much as possible. This application also adds new corrosion monitoring methods such as humidity, temperature, and water flow, and proposes a new corrosion method of flowing water that can be sprayed and immersed, which meets most of the experimental methods required for the study of the corrosion degradation mechanism of anchor rods under hydraulic coupling.

[0016] As a further solution of the present invention: the data collection and monitoring system also includes a distributed optical fiber strain sensor located above the constant temperature and humidity chamber, each of the optical fiber detectors is connected to the distributed optical fiber strain sensor, and the distributed optical fiber strain sensor is connected to the computer data collector through the optical fiber detector data acquisition circuit.

[0017] As a further solution of the present invention: a water sprinkler is installed on the inner top wall of the constant temperature and humidity box and on the outside of each anchor rod, and a plurality of water sprinkler nozzles are arranged in a circular array inside the water sprinkler. Each of the water sprinklers is connected to the water pressure pump in the water tank through a water outlet pipe, and a water collecting groove is provided on the inner bottom wall of the constant temperature and humidity box, wherein the water collecting groove is connected to the bottom of the water tank through a water inlet pipe.

[0018] As a further solution of the present invention: the water shower is connected to a computer data collector through a water circulation system control circuit provided at the rear side of the constant temperature and humidity chamber.

[0019] As a further solution of the present invention: a water temperature detector and a water temperature controller are further installed inside the water tank.

[0020] As a further solution of the present invention: reinforcement nuts are installed at the positions where the upper and lower ends of the anchor rod are connected to the constant temperature and humidity chamber, and optical fiber detector fixings are also provided at the upper and lower ends of the anchor rod.

[0021] As a further solution of the present invention: the constant temperature and humidity chamber includes a metal frame, with a top anchor rod hole and a bottom anchor rod hole respectively opened at the upper and lower ends of the metal frame, wherein sealing rubber rings are installed in the top anchor rod hole and the bottom anchor rod hole and at the connection position with the anchor rod.

[0022] As a further solution of the present invention: the miniature waterproof cameras are all connected to the computer data collector through a waterproof camera line channel.

[0023] As a further solution of the present invention: the anchor dynamometer is connected to a computer data collector via an anchor dynamometer data channel.

[0024] As a further solution of the present invention: the metal heating wire is connected to a computer data collector.

[0025] Compared with the prior art, the beneficial effects of the present invention are:

[0026] 1. This application can effectively replicate the hydraulic coupling-corrosion effects on anchor rods in tunnels in the laboratory, making it easy to observe and study the degradation process of anchor rods. Unlike existing related experimental equipment, this application focuses more on the corrosion changes of anchor rods, does not use special means to accelerate the corrosion process, and tries to corrode and degrade at a natural rate. This application also incorporates new corrosion monitoring methods such as humidity, temperature, and water flow, and proposes a new flowing water corrosion method that can be used for both sprinkling and immersion, meeting most of the experimental methods required for studying the corrosion degradation mechanism of anchor rods under hydraulic coupling.

[0027] 2. This application can explore the effect of corrosion on anchor performance degradation under different stress fields by changing the axial tensile stress field of the anchor;

[0028] This application can also explore the effect of corrosion on the performance degradation of anchor rods under the action of temperature by changing the temperature;

[0029] This application can explore the effect of corrosion on anchor performance degradation under the action of water by changing the water spraying amount;

[0030] This application uses an anchor dynamometer to monitor the axial force, which is a more accurate way to restore the tunnel detection method. The use of optical fiber monitoring can more accurately grasp the axial deformation of the anchor.

[0031] 3. The water tank in this application is used to supply water to a constant temperature and humidity chamber. This allows the study of the effect of corrosion on anchor performance degradation under the action of water spray. The water after the experiment can be returned to the water tank through the water collection groove, achieving water recycling. Furthermore, a heater and water temperature controller are installed in the water tank to adjust the temperature of the spray water. This allows the study of the effect of corrosion on anchor performance degradation under the action of water spray at different temperatures, thereby increasing the number of detection variables.

[0032] 4. The present application can solve the deficiencies of the existing test equipment for the research on anchor rod corrosion degradation under hydraulic coupling, and can achieve as much as possible the hydraulic coupling effect on the anchor rod in the tunnel, similar restoration of the water composition of sandstone, similar restoration of dynamic and static water pressure, and restoration of deep well high temperature and high pressure working conditions, and introduce a series of anchor rod strength detection, anchor rod deformation monitoring, and corrosion process monitoring, so as to facilitate further mechanistic research on anchor rod corrosion degradation under hydraulic coupling. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 This is a schematic structural diagram of a hydraulically coupled anchor corrosion testing device according to an embodiment of the present utility model;

[0034] Figure 2 This is a rear view of the hydraulic coupling anchor corrosion testing device according to an embodiment of the present utility model;

[0035] Figure 3 This is a bottom view structural diagram of a hydraulically coupled anchor corrosion testing device according to an embodiment of the utility model;

[0036] Figure 4 This is a top view of a hydraulically coupled anchor corrosion testing device according to an embodiment of the present utility model;

[0037] Figure 5 This is a schematic structural diagram of a metal frame according to an embodiment of the present utility model;

[0038] Description of reference numerals:

[0039] 1. Constant temperature and humidity chamber; 101. Metal frame; 102. Top anchor hole; 103. Sealing rubber ring; 104. Water sprayer; 105. Water spray nozzle; 106. Temperature and humidity detector; 107. Bottom anchor hole; 108. Water collection groove; 110. Support column; 111. Metal heating wire;

[0040] 2. Water circulation system; 201. Water tank; 202. Water outlet pipe; 203. Heater; 204. Water pressure pump; 205. Water temperature detector; 206. Water temperature controller; 207. Water inlet pipe; 208. Water tank support;

[0041] 3. Anchor stress and strain monitoring system; 301. Anchor; 302. Reinforcement nut; 303. Fiber optic detector; 304. Fiber optic detector fixing; 306. Anchor gasket; 307. Anchor dynamometer;

[0042] 4. Video surveillance system; 401. Mini waterproof camera; 402. Waterproof camera line channel 1;

[0043] 5. Data collection and monitoring system; 501. Computer data collector; 502. Distributed fiber optic strain sensor; 503. Fiber optic detector data acquisition circuit; 504. Water circulation system control circuit; 505. Anchor dynamometer data channel; 506. Waterproof camera circuit channel 2. DETAILED DESCRIPTION

[0044] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the embodiments described are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0045] Reference Figure 1 A hydraulically coupled anchor corrosion testing device includes a constant temperature and humidity chamber 1, a water circulation system 2, an anchor stress and strain monitoring system 3, a video monitoring system 4, and a data collection and monitoring system 5, wherein the data collection and monitoring system 5 is respectively connected to the constant temperature and humidity chamber 1, the water circulation system 2, the anchor stress and strain monitoring system 3, and the video monitoring system 4.

[0046] Reference Figure 1 and Figure 5 The constant temperature and humidity chamber 1 includes a metal frame 101. Support columns 110 are fixed on both sides of the bottom of the metal frame 101. The metal frame 101 is a rectangular frame structure as a whole. The front side of the metal frame is a transparent plate made of glass. Double-layer glass is nested in the metal frame 101. The double-layer glass can effectively isolate the external temperature. The joints are filled with rubber, which makes it easy to observe the situation inside the constant temperature and humidity chamber 1. There is a heating wire 111 in the back plate interlayer of the metal frame 101. The heating wire 111 can be connected to the computer data collector 501 in the data collection and monitoring system 5. The heating wire 111 is controlled by the data collection and monitoring system 5, and the insulation function of the constant temperature and humidity chamber can be achieved through the control of the water circulation system.

[0047] A plurality of top anchor holes 102 are equidistantly provided at the top of the metal frame 101, and a plurality of bottom anchor holes 107 are equidistantly provided at the bottom of the constant temperature and humidity chamber 1. The number of the top anchor holes 102 and the bottom anchor holes 107 are the same, and their positions correspond to each other. The top anchor holes 102 and the bottom anchor holes 107 located in the same vertical direction are used to connect to the same anchor rod 301. At the same time, a sealing rubber ring 103 is provided when the top anchor holes 102 and the bottom anchor holes 107 are connected to the anchor rod 301 to ensure the sealing of the chamber.

[0048] Furthermore, a sprinkler 104 is installed on the inner top of the metal frame 101 and outside the top anchor hole 102. A plurality of sprinkler heads 105 are provided inside the sprinkler 104. The sprinkler heads 105 are arranged toward the anchor 301. Therefore, water sprayed by the sprinkler heads 105 can directly act on the anchor 301. The water flows downward along the anchor 301 and flows back into the water tank 201 from the bottom of the metal frame 101.

[0049] Furthermore, a water collecting groove 108 is opened at the inner bottom of the metal frame 101, wherein the water collecting groove 108 is located on the outside of the bottom anchor hole 107, and the water collecting groove 108 can be connected to the water tank 201 through the water inlet pipe 207; a temperature and humidity detector 106 is also installed on the rear side wall of the metal frame 101 to detect the temperature and humidity inside the metal frame 101.

[0050] Reference Figure 1 and Figure 3 The water circulation system 2 includes a water tank 201 arranged on one side of the metal frame 101, wherein a water pressure pump 204 is installed at an upper position inside the water tank 201, and the water pressure pump 204 can be connected to the sprinkler 104 on the metal frame 101 through a water outlet pipe 202 to supply water to the sprinkler 104; a water pump is located at a lower position inside the water tank 201, wherein the water pump can also be connected to the water collecting groove 108 in the metal frame 101 through a water inlet pipe 207 to realize the recovery of water inside the water collecting groove 108.

[0051] It should be noted that the water used in the experiment also needs to undergo some special treatment. In order to restore the hydraulic coupling effect on the anchor rod in the tunnel, it is best to use the fissure water around the tunnel, and then add corresponding rock powder or coal powder to the sandstone water according to the rock layer through which the anchor rod passes, so as to restore the rust environment to which the anchor rod is subjected as much as possible.

[0052] The water tank 201 is further provided with a heater 203 and a water temperature detector 205. The water temperature detector 205 can detect the water temperature in the water tank 201, and the heater 203 can heat the water in the water tank. Water tank supports 208 are provided at the four corners of the bottom of the water tank 201. A water temperature controller 206 is used to control the water temperature in the water tank to be constant.

[0053] It should be noted that the water temperature controller 206 inside the water tank 201 is adjusted and controlled by a computer to ensure that the temperature of the circulating water is constant; the water pump and the water pressure pump 204 work separately, and the upper water pressure pump 204 ensures that the circulating water flow rate is constant and accurate; the temperature inside the water tank and the constant temperature and humidity chamber must be tested.

[0054] Reference Figure 1 、 Figure 2 、 Figure 3 and Figure 4 The anchor stress and strain monitoring system 3 includes an anchor rod 301, a reinforcement nut 302, a fiber optic detector 303, a fiber optic detector fixing part 304, an anchor rod gasket 306 and an anchor rod dynamometer 307, wherein the number of anchor rods 301, top anchor rod holes 102 and bottom anchor rod holes 107 are the same, and the fiber optic detector 303 is installed on the surface of the anchor rod 301, and the top and bottom of the anchor rod 301 are connected to the top plate and bottom plate of the metal frame 101 through the reinforcement nut 302; fiber optic detector fixing parts 304 for fixing the fiber optic detector 303 are provided at the top and bottom of the anchor rod 301, and the top of the fiber optic detector 303 is connected to the data collection and monitoring system 5; wherein the fiber optic detector 303 can monitor axial deformation, and when installing the optical fiber, some fine fiber optic grooves should be engraved on the surface of the anchor rod 301 to facilitate the fixing of the optical fiber.

[0055] Furthermore, the upper and lower parts of the anchor rod 301 are connected with anchor rod dynamometers 307 located outside the metal frame 101; it should be noted that the anchor rod gaskets 306 and anchor rod dynamometers are sealed outside the top anchor rod hole 102 and the bottom anchor rod hole 107 to further ensure the sealing of the box.

[0056] Reference Figure 1 and Figure 5 The video surveillance system 4 is composed of multiple miniature waterproof cameras 401, with a total of eight cameras fixed at the eight corners of the metal frame 101. They can observe all positions in the box in all directions and record the entire process of anchor rod surface corrosion, which is convenient for macroscopic analysis of anchor rod corrosion and deterioration. The adjacent miniature waterproof cameras 401 are connected through a waterproof camera line channel 402.

[0057] Reference Figure 2 The data collection and monitoring system 5 includes a computer data collector 501, a distributed optical fiber strain sensor 502, an optical fiber detector data acquisition circuit 503, a water circulation system control circuit 504, an anchor dynamometer data channel 505, and a waterproof camera circuit channel 2 506; the computer data collector 501 is arranged on one side of the metal frame 101;

[0058] The computer data collector 501 is connected to the distributed optical fiber strain sensor 502 through the optical fiber detector data acquisition line 503. The top of the optical fiber detector 303 is connected to the distributed optical fiber strain sensor 502. Therefore, the data detected by the optical fiber detector 303 can be sent to the computer data collector 501 for storage, collection, analysis and other processing.

[0059] The computer data collector 501 is connected to a plurality of sprinklers 104 provided on the top of the metal frame 101 through a water circulation system control line 504. The opening and closing of the sprinklers 104 are controlled by the computer data collector 501.

[0060] The computer data collector 501 is connected to the waterproof camera line channel 1 402 via the waterproof camera line channel 2 506 , and the opening and closing of each miniature waterproof camera 401 is controlled by the computer data collector 501 ;

[0061] The computer data collector 501 is connected to the anchor dynamometer 307 located at the upper and lower ends of the metal frame 101 through the anchor dynamometer data channel 505. The data detected by the anchor dynamometer 307 can be sent to the computer data collector 501 for storage, collection, analysis and other processing. The anchor dynamometer 307 monitors the stress field and deformation condition of the anchor in real time and sends the monitored data to the computer data collector 501, and then evaluates the degree of deterioration of the anchor based on the monitored data.

[0062] It should be noted that the computer data collector 501 is connected to various systems to collect temperature and humidity data, and is connected to the water circulation system 2 to control the water volume and temperature. It is additionally connected to the distributed optical fiber strain sensor 502 and the anchor dynamometer 307 to monitor the stress field and deformation condition of the anchor in real time, and evaluate the degree of anchor deterioration based on the monitored data.

[0063] The present application provides a method for conducting a hydraulic coupling-anchor rod-corrosion test using the above-mentioned device, comprising the following steps:

[0064] (1) Processing and installation of the test piece

[0065] According to the mining environment in which the anchor rod 301 is located, the corresponding data are prepared - the amount of water in the tunnel, the tunnel temperature, the tunnel humidity and the lithology of the tunnel overburden; then the sandstone water is prepared and the corresponding coal rock powder is added, and it is heated to the corresponding temperature for use; a small number of grooves are carved on the surface of the anchor rod 301 for placing the optical fiber detector 303; after the processing is completed, the anchor rod 301 is passed through the upper and lower top anchor rod holes 102 and the bottom anchor rod holes 107, the overlying metal frame 101 is opened, and the optical fiber detector 303 is fixed. After the fixing is completed, the two ends are temporarily fixed, and the optical fiber detector 303 is passed out from a separate optical fiber port, and then the metal frame 101 is covered. The exposed ends of the upper and lower anchor rods 301 are installed with anchor rod dynamometers 307 and anchor rod gaskets 306, and pre-tightening force is applied through nuts, and water-fuel ash and gravel are added to the water to simulate the actual situation of the actual mine;

[0066] (2) Assembling each system

[0067] Connect the water circulation system through the water inlet, add the pre-mixed water into the water tank 201, heat it to start the water circulation, and check the tightness of the entire system; the anchor dynamometer 307 and the fiber optic detector 303 are connected to the corresponding sensors, and the data is summarized and processed by the computer; the video monitoring system 4 is also connected to the computer data collector 501 for storage and backup;

[0068] (3) Hydraulic coupling-degradation test begins

[0069] According to the required stress field size, adjust the reinforcement nuts 302 and anchor gaskets 306 at both ends, and set the appropriate water spraying amount according to the water volume in the tunnel; during the experiment, it is necessary to manually observe the equipment at regular intervals. Corrosion and deterioration will cause the strength of the anchor 301 to decrease and the axial tensile stress field to decrease. It is necessary to strengthen the axial tensile stress field in time to keep the stress field size unchanged as much as possible during the entire experiment; the corrosion and deterioration of the anchor under the action of hydraulic coupling is a slow process that requires a long time to ensure that the entire experimental process is not interrupted.

[0070] The hydraulically coupled anchor corrosion testing device described in this application creates a comprehensive and precise experimental environment through a carefully designed integrated system. It not only comprehensively simulates the various complex conditions that anchors may encounter in mining environments, including hydraulic coupling, sandstone water composition, dynamic and static water pressure, and deep well high-temperature and high-pressure conditions, but also is equipped with an advanced anchor stress and strain monitoring system, a video surveillance system, and a data collection and monitoring system, enabling multi-angle and in-depth monitoring of anchor corrosion status and performance changes. The device's precise control capabilities ensure the stability of experimental conditions, enabling dynamic water spraying and immersion simulations to adapt to the changing mining environment. Furthermore, the device supports long-term and stable experimental operation, facilitating in-depth observation of anchor durability performance, and ensures the reliability of experimental results through efficient data integration and analysis. Its innovative flowing water corrosion simulation method has opened up new avenues for anchor corrosion degradation research, helping to deepen our understanding of the mechanisms of anchor performance degradation, thereby playing a key role in improving anchor durability and safety.

[0071] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments can still be modified, or some of the technical features thereof can be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A hydraulic coupling anchor corrosion testing device, characterized in that: include: A constant temperature and humidity chamber (1) is provided with a temperature and humidity detector (106) and a metal heating wire (111) installed therein, and a plurality of anchor rods (301) are vertically installed inside the constant temperature and humidity chamber (1); The water circulation system (2) includes a water tank (201) installed on one side of the constant temperature and humidity chamber (1), a heater (203) and a water pressure pump (204) are arranged inside the water tank (201), and the water pressure pump (204) connects the water tank (201) with the constant temperature and humidity chamber (1) through a water outlet pipe (202); An anchor rod stress and strain monitoring system (3) includes an optical fiber detector (303) installed on the anchor rod (301) and anchor rod dynamometers (307) installed at the upper and lower ends of the anchor rod (301); A video surveillance system (4) includes miniature waterproof cameras (401) installed at four corners inside the constant temperature and humidity chamber (1); The data collection and monitoring system (5) includes a computer data collector (501) located on one side of the constant temperature and humidity chamber (1), and the computer data collector (501) is respectively connected to the video monitoring system (4), the anchor stress and strain monitoring system (3), the water circulation system (2) and the constant temperature and humidity chamber (1).

2. The hydraulic coupling anchor corrosion testing device according to claim 1, characterized in that: The data collection and monitoring system (5) further comprises a distributed optical fiber strain sensor (502) located above the constant temperature and humidity chamber (1); each optical fiber detector (303) is connected to the distributed optical fiber strain sensor (502); and the distributed optical fiber strain sensor (502) is connected to the computer data collector (501) via an optical fiber detector data acquisition circuit (503).

3. The hydraulic coupling anchor corrosion testing device according to claim 1, characterized in that: A sprinkler (104) is installed on the inner top wall of the constant temperature and humidity chamber (1) and on the outer side of each anchor rod (301). A plurality of sprinkler nozzles (105) are arranged in a circular array inside the sprinkler (104). Each sprinkler (104) is connected to a pressure water pump (204) in the water tank (201) through a water outlet pipe (202). A water collecting groove (108) is provided on the inner bottom wall of the constant temperature and humidity chamber (1), wherein the water collecting groove (108) is connected to the bottom of the water tank (201) through a water inlet pipe (207).

4. The hydraulic coupling anchor corrosion testing device according to claim 3, characterized in that: The water shower (104) is connected to a computer data collector (501) via a water circulation system control circuit (504) provided at the rear side of the constant temperature and humidity chamber (1).

5. The hydraulic coupling anchor corrosion testing device according to claim 3, characterized in that: A water temperature detector (205) and a water temperature controller (206) are also installed inside the water tank (201).

6. The hydraulic coupling anchor corrosion testing device according to claim 1, characterized in that: Reinforcement nuts (302) are installed at the positions where the upper and lower ends of the anchor rod (301) are connected to the constant temperature and humidity chamber (1), and optical fiber detector fixing parts (304) are also provided at the upper and lower ends of the anchor rod (301).

7. The hydraulic coupling anchor corrosion testing device according to claim 1, characterized in that: The constant temperature and humidity chamber (1) comprises a metal frame (101), wherein a top anchor hole (102) and a bottom anchor hole (107) are respectively provided at the upper and lower ends of the metal frame (101), wherein sealing rubber rings (103) are installed in the top anchor hole (102) and the bottom anchor hole (107) and at the connection position with the anchor rod (301).

8. The hydraulic coupling anchor corrosion testing device according to claim 1, characterized in that: The miniature waterproof cameras (401) are all connected to the computer data collector (501) via waterproof camera line channels.

9. The hydraulic coupling anchor corrosion testing device according to claim 1, characterized in that: The anchor dynamometer (307) is connected to the computer data collector (501) via the anchor dynamometer data channel (505).

10. The hydraulic coupling anchor corrosion testing device according to claim 1, characterized in that: The metal heating wire (111) is connected to a computer data collector (501).

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