Environmental simulation equipment based on internal corrosion test

Abstract

The invention relates to the technical field of corrosion tests, in particular to environment simulation equipment based on an internal corrosion test, which comprises a test box, a collection box and a water bath box, the test box is fixedly mounted at the top of the water bath box through four supporting blocks, and the four supporting blocks are respectively positioned at four corners between the test box and the water bath box; the medium box enables the spraying assembly to accurately spray a test medium in the box to the surface of a test sample borne by the bearing assembly through the water inlet pipe and the spraying assembly, a corrosion test simulation environment is constructed, the flow sensor collects medium flow signals in real time, and the control module adjusts the rotating speed of the water pump and the opening degree of the electromagnetic valve according to signal feedback. Precise detection and dynamic adjustment of the spraying flow are achieved, the consistency of spraying working conditions of multiple groups of test samples is guaranteed, meanwhile, the water bath box conducts temperature pretreatment on media in the medium box in a water bath heating mode, the water bath box and a thermometer complete cooperative regulation and control of the temperature, precise control of the test temperature is achieved, and the corrosion simulation requirements of different service environments are met.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of corrosion test, in particular to an environment simulation device based on internal corrosion test. BACKGROUND

[0002] Internal corrosion refers to the corrosion phenomenon of the internal components such as the inner wall of the material or pipeline, the inner cavity of the container, and the internal passage of the metal structure, caused by chemical, electrochemical or physical action with environmental media such as liquid, gas, and direct leaching liquid, which widely exists in key fields such as petroleum chemical industry, energy, aerospace, and marine engineering.

[0003] In actual application, the existing internal corrosion test environment simulation device generally adopts a medium direct heating method for temperature control, which is easy to cause local temperature field unevenness, resulting in insufficient temperature control precision and difficulty in accurately reproducing temperature working conditions of different service scenarios. In addition, most of the devices only support single corrosion test modes of spraying or immersion. Even if some devices can realize dual-mode switching, they still need to rely on cumbersome pipeline disassembly or structural reconstruction operations, and cannot realize quick and accurate switching of spraying and immersion working conditions through simple component convenient operation, ultimately leading to the difficulty of the device in meeting the adaptation needs of diversified corrosion test scenarios. SUMMARY

[0004] The purpose of the present application is to provide an environment simulation device based on internal corrosion test to solve the problems raised in the background.

[0005] To achieve the above purpose, the present application provides the following technical scheme: an environment simulation device based on internal corrosion test, comprising a test box, a collection box and a water bath box, the test box is fixedly installed on the top of the water bath box through four supporting blocks, the four supporting blocks are respectively located at the four corners between the test box and the water bath box, the collection box is fixedly installed on the same side of the test box and the water bath box, two sealing doors are hinged to the outside of the test box, a medium box is placed in the inside of the water bath box through a support, an inner container is fixedly connected in the inside of the test box, a flow guide seat is fixedly connected in the inside of the inner container, two bearing assemblies and two spraying assemblies are arranged in the inside of the inner container, and the medium box is communicated with the two spraying assemblies through two water inlet pipes.

[0006] Preferably, a water pump and an electromagnetic valve are threadedly installed on the water inlet pipe, a thermometer is arranged in the inside of the inner container, the water pump is located directly below the electromagnetic valve, a connecting seat is fixedly connected in the inside of the flow guide seat, the top of the water inlet pipe penetrates through the bottom of the test box and the inner container and is threadedly connected with the connecting seat, the bottom of the water inlet pipe penetrates through the top of the water bath box and the medium box and extends into the inside of the medium box, and a flow sensor is arranged in the inside of the electromagnetic valve.

[0007] Preferably, the test box and the inner wall of the bottom of the liner are provided with a flow guide groove, the top of the water bath box is fixedly connected with a drain pipe, the top of the drain pipe penetrates the water bath box and is connected with the flow guide groove in the test box, and a ball valve is threadedly installed on the drain pipe.

[0008] Preferably, the top of the water bath box is fixedly connected with a water inlet, the bottom of the water bath box is fixedly connected with a drain outlet, the number of the supports is two, the two supports are symmetrically and fixedly connected to the inner wall of the bottom of the water bath box, and the medium box is placed on the top of the two supports.

[0009] Preferably, each of the bearing assemblies comprises two supports that are symmetrically and fixedly connected to the top of the flow guide seat, two placing racks are slidably connected between the two supports, each of the placing racks is downwardly inclined at an end away from the spraying assembly, one or two fixing blocks are fixedly connected to one side of each of the placing racks close to the supports, and the fixing blocks are slidably connected to the supports through sliding blocks.

[0010] Preferably, each of the supports is provided with a sliding groove on one side close to the fixing block, the sliding blocks are fixedly connected to one side of the fixing blocks close to the supports, the sliding blocks are slidably connected in the sliding grooves, and the fixing blocks and the sliding blocks are internally threadedly installed with bolts.

[0011] Preferably, the spraying assembly comprises a water supply pipe that is rotatably connected to the top of the connecting seat, the bottom of the water supply pipe is fixedly connected with a limiting sealing ring, and the bottom of the water supply pipe is rotatably connected to the top of the connecting seat through the limiting sealing ring.

[0012] Preferably, the inside of the water supply pipe is slidably connected with a fixed pipe and a movable sleeve, the outside of the water supply pipe is provided with a through groove, the fixed pipe and the movable sleeve are fixedly connected and penetrate the through groove, the outside of the water supply pipe is slidably connected with a sealing sleeve, one end of the sealing sleeve close to the fixed pipe is rotatably connected with a knob through an annular guide rail, the fixed pipe is threadedly connected with the knob, a spring is fixedly connected between the inside wall of one end of the movable sleeve close to the fixed pipe and the sealing sleeve, the inside of the fixed pipe is slidably connected with a movable pipe, the inside of the movable pipe is threadedly connected with a mounting pipe, and a spray head is threadedly installed on one end of the mounting pipe away from the water supply pipe.

[0013] Preferably, the other end of the mounting pipe is fixedly connected with a fastening ring, one end of the movable pipe close to the water supply pipe is fixedly connected with a sealing ring, and the sealing ring is sleeved on the outside of the mounting pipe.

[0014] Compared with the prior art, the present application has the following advantages: 1. The media tank is fluidly connected to the spray assembly via a water inlet pipe, allowing the spray assembly to precisely spray the test medium inside the tank onto the surface of the test sample supported by the carrier assembly, thus creating a corrosion test simulation environment. A flow sensor collects the medium flow signal in real time, and the control module adjusts the water pump speed and solenoid valve opening based on the signal feedback to achieve accurate detection and dynamic adjustment of the spray flow, ensuring the consistency of spray conditions for multiple test samples. At the same time, the water bath pre-treats the medium inside the tank through water bath heating, and works in synergy with the thermometer built into the inner tank to achieve precise control of the test temperature, meeting the corrosion simulation needs of different service environments.

[0015] 2. One end of the drain pipe is connected to the guide channel at the bottom of the inner tank, and the other end extends into the medium tank. This allows the sprayed test medium to be collected through the guide channel and then precisely returned to the medium tank through the drain pipe, achieving medium recycling. The ball valve on the drain pipe can control the opening and closing of the return channel. When the ball valve is opened, the return path is kept unobstructed, adapting to the spray test conditions. When the ball valve is closed, the medium return channel is cut off, making the inner tank a sealed test chamber. The test medium can be retained in the chamber to immerse the test sample on the bearing component, achieving the immersion test conditions. The precise switching between the spray and immersion corrosion test environments can be achieved by opening and closing the ball valve.

[0016] 3. When turning the knob, the fine-pitch thread of the knob drives the fixed tube to move the movable sleeve axially along the water supply pipe. The movable sleeve fits tightly against the inner wall of the water supply pipe to form a limit, achieving reliable positioning of the fixed tube and the nozzle after vertical adjustment. When turning the installation tube, it drives the fastening ring to move axially, causing the fastening ring to squeeze the sealing ring sleeved on the outside of the installation tube. The deformation of the sealing ring achieves a sealed fit between the installation tube and the fixed tube, completing the positioning and sealing of the nozzle after horizontal adjustment. This ensures that multiple nozzles can be accurately adjusted to the preset spray position, guaranteeing the uniformity of spray coverage and the consistency of test conditions for multiple samples. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the internal structure of the test chamber and water bath of the present invention; Figure 3 This is a schematic diagram of the internal structure of the test chamber of the present invention; Figure 4 This is a schematic diagram of the flow guide seat structure of the present invention; Figure 5 This is a schematic diagram of the top structure of the medium tank of the present invention; Figure 6 This is a schematic diagram of the load-bearing component structure of the present invention; Figure 7 This is a schematic diagram of the internal structure of the water delivery pipe of the present invention; Figure 8 This is a schematic diagram of the connection between the fixed tube and the movable sleeve of the present invention; Figure 9 This is a schematic diagram of the internal structure of the fixing tube of the present invention; Figure 10 For the present invention Figure 9 Schematic diagram of the structure at point A in the middle; Figure 11 This is a schematic diagram of the fixing block structure of the present invention.

[0018] In the diagram: 1. Test chamber; 2. Collection box; 3. Water bath; 31. Inlet; 32. Drain; 33. Bracket; 4. Sealing door; 5. Support block; 6. Medium tank; 7. Inner liner; 8. Flow guide seat; 9. Bearing assembly; 91. Support; 92. Placement rack; 93. Fixing block; 94. Slider; 95. Bolt; 10. Spray assembly; 101. Water supply pipe; 102. Sealing sleeve; 103. Fixing pipe; 104. Movable sleeve; 105. Through groove; 106. Spring; 107. Knob; 108. Movable tube; 109. Nozzle; 110. Mounting tube; 111. Fastening ring; 112. Sealing ring; 11. Thermometer; 12. Drain pipe; 13. Ball valve; 14. Inlet pipe; 15. Water pump; 16. Solenoid valve; 17. Flow guide groove; 18. Connecting seat. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Please see Figures 1 to 11 The present invention provides a technical solution: an environmental simulation device based on internal corrosion test, including a test chamber 1, a collection box 2 and a water bath 3. The test chamber 1 is fixedly installed on the top of the water bath 3 by four support blocks 5. The four support blocks 5 are located at the four corners between the test chamber 1 and the water bath 3. The support blocks 5 are made of stainless steel and are fastened to the bottom of the test chamber 1 and the top of the water bath 3 by bolts, so as to achieve stable fixation of the test chamber 1 on the top of the water bath 3 and avoid vibration during the test affecting the test accuracy. The sampling box 2 is fixed to the same side of the test chamber 1 and the water bath 3 by welding. The sampling box 2 integrates a PLC control module, which can be an S7-200SMART model, to realize the coordinated control of various actuators of the equipment. There are two sealing doors 4 on the outside of the test chamber 1 by hinges. Fluororubber sealing strips are set at the connection between the sealing doors 4 and the test chamber 1. After closing the sealing doors 4, the front end of the test chamber 1 can be sealed, effectively isolating the external environment from interfering with the corrosion process of the internal test samples.

[0021] Inside the water bath 3, the medium tank 6 is placed by two symmetrical supports 33 welded to the bottom inner wall. The supports 33 are made of carbon steel and the surface is galvanized for rust prevention. The top of the two supports 33 is machined with anti-slip grooves. The medium tank 6 is placed in the top grooves of the two supports 33 to ensure that the medium tank 6 is stably placed in the water bath 3 and to prevent the medium tank 6 from shifting during the water bath. The medium tank 6 is made of transparent and corrosion-resistant acrylic material and is used to store liquid media for testing, such as salt water, acid and alkali solutions. By injecting water or coolant into the water bath 3, the temperature of the test media in the medium tank 6 can be precisely controlled. The top of the water bath 3 is fixedly connected to a water inlet 31, which is connected to a liquid inlet pipe. A shut-off valve is installed on the liquid inlet pipe for accurately adding coolant or water into the water bath 3. The bottom of the water bath 3 is fixedly connected to a drain outlet 32, which is connected to a liquid outlet pipe. A shut-off valve is also installed on the liquid outlet pipe for conveniently draining the coolant or water from the water bath 3, facilitating the replacement of the temperature control medium and the cleaning and maintenance of the water bath 3.

[0022] The interior of the test chamber 1 is fixedly connected to the inner liner 7 by welding. The inner liner 7 is made of 316L stainless steel, which has excellent corrosion resistance and can adapt to a variety of test media environments. The inner liner 7 is welded with a flow guide seat 8, which has a conical groove to facilitate the convergence of the medium in the flow guide groove 17. The inner liner 7 is equipped with two bearing components 9 and two spraying components 10. The bearing components 9 are used to place the test sample, and the spraying components 10 are used to apply the test medium evenly to the surface of the test sample to realize the internal corrosion test. The thermometer 11 is also fixedly installed inside the inner liner 7 by a bracket. The thermometer 11 uses a PT100 temperature sensor with a detection accuracy of ±0.1℃. Its signal output terminal is electrically connected to the PLC control module in the acquisition box 2 through a wire. It can detect the temperature inside the inner liner 7 in real time and feed it back to the control module to ensure that the test temperature is stable within the set range.

[0023] The medium tank 6 is connected to two spray components 10 through two water inlet pipes 14 respectively. Its top passes through the bottom of the test chamber 1 and the inner tank 7 and is threadedly connected to the connecting seat 18 inside the guide seat 8. A nitrile rubber sealing gasket is provided at the connection to prevent medium leakage. The bottom of the water inlet pipe 14 passes through the top of the water bath 3 and the medium tank 6 and extends to the bottom of the inside of the medium tank 6 to ensure that the medium in the medium tank 6 can be fully extracted and transported. A water pump 15 and a solenoid valve 16 are threaded onto the inlet pipe 14. The water pump 15 is located directly below the solenoid valve 16. The water pump 15 is a miniature stainless steel centrifugal pump, model DB-12V, and its power input terminal is electrically connected to the PLC control module via a wire. The control module controls the start, stop, and speed adjustment to drive the flow of the medium in the inlet pipe 14. The solenoid valve 16 is an electromagnetic shut-off valve, model 2W-160-15, and its control terminal and the signal output terminal of the internally integrated flow sensor are both electrically connected to the PLC control module in the acquisition box 2. The solenoid valve 16 is used to control the opening and closing of the inlet pipe 14. The flow sensor can detect the flow rate of the medium in the inlet pipe 14 in real time and feed it back to the control module. The control module adjusts the speed of the water pump 15 to ensure the consistency of the flow rate in the test environment of multiple test samples.

[0024] The spray assembly 10 is rotatably connected to the top of the connecting seat 18, and a limit sealing ring made of fluororubber is fixedly connected to its bottom. The sealing ring is rotatably connected to the top of the connecting seat 18. The spray angle can be adjusted by manually rotating the entire spray assembly 10 to avoid affecting the height adjustment of the bearing assembly 9. The spray assembly (10) includes a water delivery pipe (101) rotatably connected to the top of the connecting seat (18), and a limit sealing ring is fixedly connected to the bottom of the water delivery pipe (101). The bottom of the water delivery pipe (101) is rotatably connected to the top of the connecting seat (18) through the sealing ring. The water supply pipe 101 is made of stainless steel and has a fixed pipe 103 and a movable sleeve 104 slidingly connected inside. The movable sleeve 104 is made of polytetrafluoroethylene, which has corrosion resistance and low friction characteristics. A through groove 105 is provided on the outer side of the water supply pipe 101 along its length. The width of the through groove 105 is adapted to the diameter of the fixed pipe 103. The fixed pipe 103 and the movable sleeve 104 are fixedly connected by welding and pass through the through groove 105. The movable sleeve 104 has an arc-shaped ring structure with a central angle of less than 180°. It is non-closed and its span is larger than the width of the through groove so as to completely cover the through groove 105 to form a seal. A sealing sleeve 102 is slidably connected to the outside of the water supply pipe 101. The fixed pipe 103 passes through the sealing sleeve 102. The inner wall of the sealing sleeve 102 is integrally formed with a protrusion. The protrusion is slidably connected to the through groove 105, which can guide the movement of the fixed pipe 103, ensure the stability of the up and down movement of the fixed pipe 103, and reduce the movement stress at its connection with the movable sleeve 104. The sealing sleeve 102 is rotatably connected to a knob 107 at one end near the fixed tube 103 via a ball bearing ring guide. The ball bearing guide can reduce the rotational resistance of the knob 107. The fixed tube 103 and the knob 107 are connected by a thread. Rotating the knob 107 can drive the fixed tube 103 and the movable sleeve 104 to move laterally synchronously through the thread. Under the contact and limitation between the movable sleeve 104 and the inner wall of the water supply pipe 101, it is ensured that the fixed tube 103 only moves laterally along its axis and does not rotate. A spring 106 is fixedly connected between the movable sleeve 104 and the inner wall of the sealing sleeve 102 near the fixed tube 103. The spring 106 is of the tension type, which improves the stability of the threaded fit between the knob 107 and the fixed tube 103. A movable tube 108 is slidably connected inside the fixed tube 103. The movable tube 108 is fixed to the fixed tube 103 by bolts. The movable tube 108 is threadedly connected to the installation tube 110. A nozzle 109 is threadedly installed at the end of the installation tube 110 away from the water supply pipe 101. The nozzle 109 can be replaced according to the actual situation to achieve uniform spraying of the test sample. The other end of the installation pipe 110 is fixedly connected to a fastening ring 111 by screws. The end of the movable pipe 108 near the water supply pipe 101 is fixedly connected to a sealing ring 112, which is made of fluororubber. The sealing ring 112 is sleeved on the outside of the installation pipe 110. Rotating the installation pipe 110 can drive the fastening ring 111 to squeeze the sealing ring 112, causing the sealing ring 112 to deform between the installation pipe 110 and the fixed pipe 103, thereby achieving a seal at the connection between the two and ensuring no leakage during the flow of the medium.

[0025] The support component 9 includes two supports 91 symmetrically welded to the top of the flow guide seat 8. The supports 91 are made of stainless steel and are used to provide stable support for both ends of the placement frame 92. Two placement racks 92 are slidably connected between the two supports 91. The placement racks 92 are made of stainless steel and are used to place test samples. The end of the placement rack 92 away from the spray assembly 10 is tilted downward to facilitate the flow of the medium during the spraying process and prevent the medium from accumulating on the placement rack 92. Each placement rack 92 has two fixed blocks 93 welded and fixedly connected to the side of the support 91. The fixed blocks 93 are slidably connected to the support 91 through sliders 94. A sliding groove is provided on the side of the support 91 near the fixed blocks 93. The sliders 94 are welded and fixed to the side of the fixed blocks 93 near the support 91, and the sliders 94 are slidably connected in the sliding groove to achieve stable height adjustment of the placement rack 92. The fixing block 93 and the slider 94 are both threaded together and bolt 95 is installed. When the placement bracket 92 is adjusted to the appropriate height, as... Figure 11 As shown, the operator inserts a tool into the fixing block 93, aligns it with the internal hexagonal hole on the bolt 95, and tightens the bolt 95 so that the end of the bolt 95 presses tightly against the inner wall of the groove of the support 91, thereby fixing the position of the placement frame 92 after the height adjustment.

[0026] The bottom inner wall of the test chamber 1 and the inner liner 7 are integrally provided with a flow guide groove 17, which has a V-shaped structure to facilitate the convergence and flow of the medium. The top of the water bath 3 is fixedly connected to a drain pipe 12. The top of the drain pipe 12 passes through the water bath 3 and is connected to the guide channel 17 inside the test chamber 1. A sealing gasket is provided at the connection. The medium in the inner liner 7 can be guided into the drain pipe 12 through the guide channel 17 and then flow back into the medium tank 6 through the drain pipe 12, so as to realize the recycling of the test medium and reduce the test cost. A ball valve 13, model Q11F-16P, is threaded onto the drain pipe 12. By opening and closing the ball valve 13, the internal space of the inner tank 7 can be sealed and connected, thereby switching between two test environment simulation modes: immersion and spraying. When the ball valve 13 is opened, the medium can circulate, which is the spraying test mode. When the ball valve 13 is closed, the inner tank 7 forms a sealed space to store the medium, which is the immersion test mode.

[0027] In actual use, the spray test mode process is as follows: First, open the sealing door 4. According to the size of the test sample and the test requirements, loosen the bolt 95. Adjust the height of the placement frame 92 by sliding the slider 94 in the groove of the support 91. After the adjustment is completed, tighten the bolt 95 to fix the placement frame 92. Place the test sample evenly on the placement rack 92, manually rotate the spray assembly 10 to a suitable spray angle, rotate the knob 107 to adjust the height of the nozzle 109, slide the movable tube 108 and rotate the mounting tube 110 to adjust the horizontal position of the nozzle 109, and after adjustment, rotate the mounting tube 110 again to make the fastening ring 111 squeeze the sealing ring 112 to achieve a seal. Close the sealing door 4, add a temperature control medium of appropriate temperature into the water bath 3 through the water inlet 31, start the PLC control module in the acquisition box 2, and start the water pump 15 by the control module to open the solenoid valve 16 and the ball valve 13. Driven by the water pump 15, the test medium in the medium tank 6 is transported through the water inlet pipe 14 to the water delivery pipe 101 of the spray assembly 10, and finally sprayed from the nozzle 109 onto the surface of the test sample through the fixed pipe 103, the movable pipe 108 and the installation pipe 110. After spraying, the medium falls to the bottom of the inner tank 7 under the action of gravity, is guided by the V-shaped guide channel 17 into the drain pipe 12, and flows back into the medium tank 6 through the drain pipe 12, realizing the recycling of the medium. During the test, thermometer 11 monitors the temperature inside the inner tank 7 in real time, and flow sensor monitors the flow rate of the medium inside the inlet pipe 14 in real time. Both signals are fed back to the PLC control module. The control module automatically adjusts the speed of water pump 15 and the opening of solenoid valve 16 according to preset parameters to ensure that the test temperature and flow rate are stable within the set range.

[0028] Immersion test mode procedure: Following the preliminary steps of the spray test mode, complete the placement of the test sample and the adjustment of the spray component 10, close the sealing door 4 and add a temperature-controlled medium of appropriate temperature into the water bath 3; Start the PLC control module, which will then start the water pump 15 and solenoid valve 16, and close the ball valve 13. The test medium in the medium tank 6 is injected into the inner tank 7 through the water inlet pipe 14 and the spray assembly 10 until the test sample is submerged by the medium. The water pump 15 and the solenoid valve 16 are then shut off by the PLC control module. During the test, the water bath 3 continuously controls the temperature of the medium in the medium tank 6, thereby maintaining the temperature stability of the immersion medium in the inner tank 7. The thermometer 11 feeds back the temperature signal to the control module in real time to ensure that the immersion environment temperature meets the test requirements. After the immersion test is completed, the ball valve 13 is opened, and the medium in the inner tank 7 can flow back to the medium tank 6 through the drain pipe 12 for recycling.

[0029] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An environmental simulation device based on internal corrosion testing, characterized in that, The test chamber (1), the collection box (2), and the water bath (3) are included. The test chamber (1) is fixedly installed on the top of the water bath (3) by four support blocks (5). The four support blocks (5) are located at the four corners between the test chamber (1) and the water bath (3). The collection box (2) is fixedly installed on the same side of the test chamber (1) and the water bath (3). Two sealing doors (4) are hinged to the outside of the test chamber (1). The media tank (6) is placed inside the water bath (3) by a bracket (33). The inner liner (7) is fixedly connected inside the test chamber (1). The guide seat (8) is fixedly connected inside the inner liner (7). The inner liner (7) is provided with two bearing components (9) and two spray components (10). The media tank (6) is connected to the two spray components (10) by two water inlet pipes (14).

2. The environmental simulation equipment based on internal corrosion testing according to claim 1, characterized in that: A water pump (15) and a solenoid valve (16) are threaded onto the water inlet pipe (14). A thermometer (11) is installed inside the inner tank (7). The water pump (15) is located directly below the solenoid valve (16). A connecting seat (18) is fixedly connected inside the flow guide seat (8). The top of the water inlet pipe (14) passes through the bottom of the test chamber (1) and the inner tank (7) and is threadedly connected to the connecting seat (18). The bottom of the water inlet pipe (14) passes through the top of the water bath (3) and the medium tank (6) and extends into the interior of the medium tank (6). A flow sensor is installed inside the solenoid valve (16).

3. The environmental simulation equipment based on internal corrosion testing according to claim 1, characterized in that: The test chamber (1) and the inner liner (7) have a flow channel (17) on their bottom inner walls. The top of the water bath (3) is fixedly connected to a drain pipe (12). The top of the drain pipe (12) passes through the water bath (3) and is connected to the flow channel (17) inside the test chamber (1). A ball valve (13) is threaded onto the drain pipe (12).

4. The environmental simulation equipment based on internal corrosion testing according to claim 1, characterized in that: The top of the water bath (3) is fixedly connected to a water inlet (31), and the bottom of the water bath (3) is fixedly connected to a drain outlet (32). There are two brackets (33), which are symmetrically fixedly connected to the bottom inner wall of the water bath (3). The medium tank (6) is placed on top of the two brackets (33).

5. The environmental simulation equipment based on internal corrosion testing according to claim 1, characterized in that: Each of the bearing components (9) includes two supports (91) symmetrically fixedly connected to the top of the flow guide seat (8). Two placement racks (92) are slidably connected between the two supports (91). The end of each placement rack (92) away from the spray assembly (10) is inclined downward. Each placement rack (92) has two fixing blocks (93) fixedly connected to the side of the support (91) near the support. The fixing blocks (93) are slidably connected to the support (91) by a slider (94).

6. The environmental simulation equipment based on internal corrosion testing according to claim 5, characterized in that: The support (91) has a groove on the side near the fixed block (93). The slider (94) is fixedly connected to the side of the fixed block (93) near the support (91). The slider (94) is slidably connected in the groove. The fixed block (93) and the slider (94) are threaded with bolts (95).

7. The environmental simulation equipment based on internal corrosion testing according to claim 1, characterized in that: The spray assembly (10) includes a water delivery pipe (101) rotatably connected to the top of the connecting seat (18), and a limit sealing ring is fixedly connected to the bottom of the water delivery pipe (101). The bottom of the water delivery pipe (101) is rotatably connected to the top of the connecting seat (18) through the sealing ring.

8. The environmental simulation equipment based on internal corrosion testing according to claim 7, characterized in that: The water delivery pipe (101) is internally slidably connected to a fixed pipe (103) and a movable sleeve (104). A through groove (105) is provided on the outside of the water delivery pipe (101). The fixed pipe (103) is fixedly connected to the movable sleeve (104) and passes through the through groove (105). A sealing sleeve (102) is slidably connected to the outside of the water delivery pipe (101). A knob (107) is rotatably connected to one end of the sealing sleeve (102) near the fixed pipe (103) via a ring guide rail. The fixed tube (103) is threadedly connected to the knob (107). A spring (106) is fixedly connected between the movable sleeve (104) and the sealing sleeve (102) near the inner wall of the fixed tube (103). The movable tube (108) is slidably connected inside the fixed tube (103). The installation tube (110) is threadedly connected inside the movable tube (108). A nozzle (109) is threadedly installed at the end of the installation tube (110) away from the water supply pipe (101).

9. An environmental simulation device based on internal corrosion testing according to claim 8, characterized in that: The other end of the installation pipe (110) is fixedly connected to a fastening ring (111), and the end of the movable pipe (108) near the water supply pipe (101) is fixedly connected to a sealing ring (112), which is sleeved on the outside of the installation pipe (110).

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