A device and method for testing the corrosion resistance properties of materials used in air preheaters

Abstract

This invention relates to the field of corrosion resistance testing technology, and discloses a device and method for testing the corrosion resistance performance of materials used in air preheaters. The device includes a testing chamber, a chamber cover, and control equipment. The testing chamber has an inner cavity containing a sprayer and a mounting assembly within the inner cavity. The mounting assembly includes multiple sets of mounting brackets within the inner cavity and movable plates opposite to the mounting brackets. Each movable plate has an assembly groove with multiple sets of abutment clamps. The abutment clamps are detachably mounted to the assembly groove by bolts. A telescopic component connects the mounting brackets and the movable plates. This invention, by incorporating a swinging component, drives the connecting block to swing, achieving reciprocating swing of the mounting brackets. This further reflects the effects of dynamic vibrations in actual use of raw materials, such as accelerated penetration of corrosive media and changes in the adhesion state of corrosion products.

Description

Technical Field

[0001] This invention relates to the field of corrosion resistance testing technology, and in particular to a device and method for testing the corrosion resistance properties of materials used in air preheaters. Background Technology

[0002] Air preheaters are key components in boiler equipment for recovering heat from flue gas. The heat exchange fins in air preheaters are in direct contact with the flue gas, and the working environment is often accompanied by high temperature, acidic flue gas, and water vapor condensate. Therefore, the materials used must have excellent corrosion resistance. To evaluate the corrosion resistance of such materials, acidic salt spray test chambers are commonly used equipment. By preparing a specific hydrochloric acid solution, the solution is atomized into salt spray in a sealed test chamber, while maintaining a constant temperature inside the chamber, so that the salt spray continuously acts on the surface of the material to be tested. By observing the degree of corrosion of the material within a set time, its corrosion resistance is quantified.

[0003] A salt spray testing device disclosed in CN110595992A includes a test chamber and a control chamber. The control chamber is equipped with a processor. The test chamber has an elliptical inner cavity with a mounting plate welded to it. The mounting plate is connected to a stepless speed-regulating fan, a water tank, and an ultrasonic atomizer. A rectifier is located on the other side of the mounting plate. A salt spray collector and a first temperature sensor are located on the inner wall of the elliptical inner cavity. A drainage trough is located at the bottom of the elliptical inner cavity and is connected to a drainage pipe. A maintenance cover is bolted to the back of the test chamber. A control chamber cover is hinged to the control chamber. A salt solution storage tank is located inside the control chamber. A liquid filling cover is hinged to the upper surface of the control chamber. A water pump is connected to the salt solution storage tank, and the water pump is connected to the water tank via a pipe. Although the above technical solution is convenient to control and can form uniform and fine salt spray, meeting the experimental conditions.

[0004] In existing technologies, current testing methods typically involve mounting the material to be tested on a fixed bracket inside a test chamber as required, followed by salt spray testing. However, in reality, during air preheater operation, high-temperature flue gas continuously impacts the surface of the heat exchanger material. The material, affected by boiler vibration and flue gas impact, experiences high-frequency dynamic vibration. This dynamic vibration may accelerate the penetration of corrosive media and alter the adhesion state of corrosion products on the material surface. The fixed bracket keeps the material stationary, failing to simulate the impact of dynamic vibration on the corrosion process. Furthermore, the heat exchanger plates in air preheaters typically employ a staggered arrangement structure, meaning the material surface is subjected not only to vertical flue gas impact but also to oblique airflow and the scouring of fly ash particles carried within. Vertical and oblique corrosion may exacerbate localized corrosion of the material. The fixed installation method usually only allows the material surface to come into contact with salt spray in one direction, failing to simulate multi-directional corrosion, thus causing discrepancies between the tested corrosion resistance performance and the actual situation. Summary of the Invention

[0005] The purpose of this invention is to provide a corrosion-resistant material performance testing device and method for air preheaters, in order to solve the problem mentioned in the background art that the existing testing devices cannot simulate the dynamic vibration and multi-directional corrosion of materials, resulting in a deviation between the detected corrosion resistance performance and the actual situation.

[0006] This invention provides a device and method for testing the corrosion resistance of materials used in air preheaters, employing the following technical solution:

[0007] A corrosion-resistant material performance testing device for an air preheater includes a testing chamber, a chamber cover, and a control device. The testing chamber has an inner cavity, a sprayer is installed inside the inner cavity, and an installation assembly is also provided in the inner cavity.

[0008] The mounting assembly includes multiple sets of mounting brackets disposed in the inner cavity and a movable plate disposed opposite to the mounting brackets. Each set of movable plates is provided with an assembly slot, and multiple sets of abutment clips are provided on the assembly slot. The abutment clips are detachably mounted on the assembly slot by bolts. A telescopic component is provided between the mounting brackets and the movable plate. The telescopic component allows the movable plate to fix the material to be tested on the mounting bracket.

[0009] The mounting frame is symmetrically provided with swing components. The swing components include extension columns fixed at both ends of the mounting frame, connecting blocks fixed at the ends of the extension columns, two sets of sliding rods fixed on the connecting blocks, and sliding blocks fixed to the sliding rods. Two sets of frame sides are fixed in the inner cavity. The two sets of frame sides are symmetrically distributed along the length direction of the mounting frame. Each set of frame sides is provided with a serpentine guide rail with the same number as the mounting frame. The sliding rods are slidably connected in the corresponding serpentine guide rail.

[0010] Furthermore, the swing assembly also includes a connecting rod rotatably sleeved on each set of extension columns. A connecting rope is fixed to one end of the connecting rod away from the extension column. A take-up shaft, matching the number of mounting brackets, is rotatably provided inside the cavity. The other end of the connecting rope is fixed to the corresponding take-up shaft and wound around the outer surface of the take-up shaft in a winding manner.

[0011] Furthermore, one end of each set of take-up shafts extends outside the detection box, and a drive assembly is provided outside the detection box. The drive assembly includes a motor, a half gear fixed to the output end of the motor, a pinion meshing with the half gear, a sprocket fixed to the end of each set of take-up shafts, and a chain meshing between the sprockets. The pinion is fixed to one end of one set of take-up shafts.

[0012] The mounting bracket is symmetrically equipped with a spring-back mechanism, which is used to assist the mounting bracket in resetting.

[0013] Furthermore, the rebound mechanism includes a sleeve rod, a cavity opened in the sleeve rod, a movable rod inserted into the cavity, a stop block fixed to one end of the movable rod, and a second spring provided on the surface of the movable rod. The other end of the movable rod is hinged to a first connecting seat, which is fixed on the mounting bracket. The end of the sleeve rod away from the movable rod is hinged to a second connecting seat, and a bracket is fixed on the second connecting seat. The bracket is fixedly installed on the inner wall of the inner cavity.

[0014] Furthermore, one end of one of the winding shafts is provided with a torsion spring, the two ends of which are fixed to the pinion and the detection box, respectively.

[0015] Furthermore, the serpentine guide rail includes a serpentine section and a vertical section that is connected to both ends of the serpentine section. When the slide rod is slidably connected in the vertical section, the mounting frame is in a vertical state. When the slide rod is slidably connected in the serpentine section, the mounting frame is in a swinging state.

[0016] Furthermore, the telescopic component includes a connecting block symmetrically fixed on the movable plate, a first insert rod that movably passes through the connecting block, and a first spring disposed on the first insert rod, with one end of the first insert rod fixed to the mounting bracket.

[0017] Furthermore, the telescopic component also includes a second insert rod that movably penetrates the connecting block. One end of the second insert rod is fixed to the mounting bracket. The surface of the second insert rod is threaded, and a threaded sleeve is threaded onto the surface of the second insert rod. The inner side of the threaded sleeve contacts the connecting block.

[0018] Furthermore, the drive assembly also includes a maintenance cover that is detachably mounted on the testing box, wherein the motor is installed inside the maintenance cover.

[0019] Furthermore, a method for testing the corrosion resistance properties of materials used in air preheaters, employing equipment for testing the corrosion resistance properties of materials used in air preheaters, includes the following steps:

[0020] Step 1: Open the box cover, place the material to be tested between the mounting frame and the moving plate, and use the telescopic components to make the moving plate cooperate with the mounting frame to clamp and fix the material.

[0021] Step 2: Close the lid and start the test chamber through the control device to make the sprayer in the inner cavity start working, spraying salt spray into the inner cavity to simulate an acidic corrosion environment;

[0022] Step 3: Start the motor. Under the action of the half gear, pinion, sprocket and chain, multiple sets of winding shafts rotate synchronously to wind up and unwind the connecting rope.

[0023] Step 4: Pull the extension column with the connecting rope to make the slide bar slide inside the serpentine guide rail, and the mounting frame will cause the material to be tested to swing along the trajectory of the serpentine guide rail;

[0024] Step 5: During the testing process, the testing time and temperature are set by controlling the equipment, and the corrosion of the material is observed during this period;

[0025] Step Six: After the test is completed, turn off the motor and sprayer, open the box cover, remove the tested material, observe and record its degree of corrosion, and complete the corrosion resistance test.

[0026] The beneficial effects of this invention are:

[0027] By incorporating a swinging component, two sets of sliding rods on each connecting block are slidably connected within the same serpentine guide rail. As the sliding rods slide, the displacement difference caused by their different positions on the serpentine guide rail drives the connecting blocks to swing, thus enabling the mounting frame to swing back and forth. This further simulates the dynamic vibrations in actual use of raw materials, which can lead to accelerated penetration of corrosive media and changes in the adhesion state of corrosion products. Simultaneously, the reciprocating swing of the mounting frame can also simulate the dynamic scenario of the material surface being scoured by multi-directional airflow and fly ash particles, making the adhesion and penetration of salt spray on the material surface more closely resemble the actual corrosion state, thereby making the detected corrosion resistance performance closer to the actual working conditions.

[0028] By setting up a drive assembly and a rebound mechanism, the motor in the drive assembly drives the half gear and the small gear to mesh, and together with the sprocket and chain, realizes the synchronous rotation of multiple sets of winding shafts, so that the tension of the connecting rope on the extension column is evenly transmitted. When the tension disappears, the second spring of the rebound mechanism releases the elastic force, causing the movable rod to pull the mounting frame back to its original position. At the same time, the hinge between the movable rod and the first connecting seat, and the hinge between the sleeve rod and the second connecting seat, can flexibly adapt to the angle changes when the mounting frame swings. Attached Figure Description

[0029] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0030] Figure 2 This is a schematic diagram of the box lid structure in the open state according to the present invention;

[0031] Figure 3 This is a three-dimensional structural diagram of the detection box, inner cavity, mounting assembly, swing assembly, and rebound mechanism of the present invention.

[0032] Figure 4 This is a three-dimensional structural diagram of the mounting assembly, swing assembly, and springback mechanism of the present invention.

[0033] Figure 5 This is a three-dimensional structural diagram of the mounting component and the swing component of the present invention;

[0034] Figure 6 This is an exploded three-dimensional structural diagram of the movable plate, the abutment clip, and the bolts of the present invention.

[0035] Figure 7This is a partial three-dimensional structural diagram of the mounting frame, movable plate, swing assembly and rebound mechanism of the present invention;

[0036] Figure 8 This is a partial three-dimensional structural diagram of the mounting frame and swing assembly of the present invention;

[0037] Figure 9 This is a side view cross-sectional diagram of the extension column, connecting block, slide rod, sliding block, frame, serpentine guide rail, and connecting rod of the present invention;

[0038] Figure 10 This is a schematic diagram of the three-dimensional structure of the mounting frame and movable plate of the present invention in a swinging state.

[0039] Figure 11 This is a three-dimensional structural diagram of the detection box and drive assembly of the present invention;

[0040] Figure 12 This is a three-dimensional structural diagram of the connecting rope, winding shaft, and drive assembly of the present invention.

[0041] Figure 13 This is an exploded three-dimensional structural diagram of the springback mechanism of the present invention.

[0042] In the picture:

[0043] 1. Testing box; 2. Box cover; 3. Control equipment; 4. Inner cavity; 5. Sprayer; 6. Mounting assembly; 61. Mounting bracket; 62. Moving plate; 63. Assembly slot; 64. Abutment clamp; 65. Bolt; 66. Telescopic component; 661. Connecting block; 662. First insert rod; 663. First spring; 664. Second insert rod; 665. Screw sleeve; 7. Swing assembly; 71. Extension column; 72. Connecting block; 73. Slide rod; 74. Sliding block; 75. Frame; 76. Serpentine guide rail; 761. Serpentine section; 762. Vertical section; 77. Connecting rod; 78. Connecting rope; 79. Rewinding shaft; 8. Drive assembly; 81. Motor; 82. Half gear; 83. Pinion; 84. Torsion spring; 85. Sprocket; 86. Chain; 87. Maintenance cover; 9. Rebound mechanism; 91. Sleeve rod; 92. Cavity; 93. Movable rod; 94. Stop block; 95. Second spring; 96. First connecting seat; 97. Second connecting seat; 98. Bracket. Detailed Implementation

[0044] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0045] Reference Figure 1 - Figure 2The present invention provides a corrosion resistance material performance testing device for air preheaters, including a testing box 1, a box cover 2, and a control device 3. The box cover 2 is rotatably mounted on the top of the testing box 1, the control device 3 is located on the outside of the testing box 1, and an inner cavity 4 is opened inside the testing box 1, and a sprayer 5 is installed in the inner cavity 4.

[0046] Reference Figure 2 - Figure 6 It also includes the mounting assembly 6 located in the inner cavity 4;

[0047] Specifically, the mounting assembly 6 includes multiple sets of mounting brackets 61 disposed within the inner cavity 4 and movable plates 62 disposed opposite to the mounting brackets 61. Each movable plate 62 has an assembly slot 63, and the assembly slot 63 is provided with multiple sets of abutment clips 64. The abutment clips 64 are detachably mounted on the assembly slot 63 by bolts 65. The abutment clips 64 can be detachably mounted at different positions in the assembly slot 63 by bolts 65 to accommodate materials of different sizes. A telescopic component 66 is provided between the mounting brackets 61 and the movable plates 62. The telescopic component 66 drives the movable plates 62 closer to the mounting brackets 61, fixing the material to be tested between the mounting brackets 61 and the movable plates 62.

[0048] Specifically, the telescopic component 66 includes a connecting block 661 symmetrically fixed on the movable plate 62, a first insert rod 662 movably penetrating the connecting block 661, and a first spring 663 disposed on the first insert rod 662. One end of the first insert rod 662 is fixed to the mounting frame 61. When the material to be tested is placed between the mounting frame 61 and the movable plate 62, the first spring 663 pushes the connecting block 661 to move the movable plate 62 toward the mounting frame 61 until the movable plate 62 is in close contact with the material, thereby clamping and fixing the material. The telescopic component 66 also includes a second insert rod 664 movably penetrating the connecting block 661. One end of the insertion rod 664 is fixed to the mounting bracket 61. The surface of the second insertion rod 664 is threaded, and a threaded sleeve 665 is threaded onto the surface of the second insertion rod 664. The inner side of the threaded sleeve 665 contacts the connecting block 661. After the moving plate 62 initially clamps the material to be tested by the elastic force of the first spring 663, the threaded sleeve 665 is rotated. Since the surface of the second insertion rod 664 is threaded and fixed to the mounting bracket 61, the threaded sleeve 665 will move along the thread of the second insertion rod 664 toward the connecting block 661. The inner side of the threaded sleeve 665 is in close contact with the connecting block 661 and applies pressure, thereby further improving the clamping force on the material.

[0049] Reference Figure 7 - Figure 9The mounting frame 61 is symmetrically provided with a swing assembly 7. The swing assembly 7 includes an extension column 71 fixed at both ends of the mounting frame 61, a connecting block 72 fixed at the end of the extension column 71, two sets of sliding rods 73 fixed on the connecting block 72, and a sliding block 74 fixed to the sliding rods 73. Two sets of frame 75 are fixed in the inner cavity 4. The two sets of frame 75 are symmetrically distributed along the length of the mounting frame 61. Each set of frame 75 is provided with a number of serpentine guide rails 76 that are the same as the number of mounting frames 61. The two sets of sliding rods 73 are connected in a serpentine manner. The connecting blocks 72 are arranged at fixed intervals. The two sets of sliding rods 73 on each set of connecting blocks 72 are slidably connected to the same serpentine guide rail 76. When the sliding rods 73 slide in the corresponding serpentine guide rail 76, the two sets of sliding rods 73 will be in different positions on the serpentine guide rail 76. The curved part of the serpentine guide rail 76 will cause the sliding rod 73 that reaches the position first to move in a biased direction, and the sliding rod 73 that arrives later will follow the trajectory of the serpentine guide rail 76 to move accordingly. The displacement difference between the two sets of sliding rods 73 will cause the connecting blocks 72 to swing.

[0050] Specifically, refer to Figure 10 The serpentine guide rail 76 includes a serpentine section 761 and a vertical section 762 that is connected to both ends of the serpentine section 761. The serpentine section 761 and the vertical section 762 are integrally formed. When the slide rod 73 is slidably connected in the vertical section 762, the mounting frame 61 is in a vertical state. When the slide rod 73 is slidably connected in the serpentine section 761, the mounting frame 61 is in a swinging state due to the continuous curved wave structure of the serpentine section 761. This can simulate the dynamic vibration and multi-directional corrosion of the heat exchange plate material caused by boiler vibration and flue gas impact during the operation of the air preheater. When the slide rod 73 is in the vertical section 762, the vertical state maintained by the mounting frame 61 can facilitate the positioning and installation of the material to be tested.

[0051] Reference Figure 7 - Figure 10 The swing assembly 7 also includes a connecting rod 77 rotatably sleeved on each set of extension columns 71. A connecting rope 78 is fixed to one end of the connecting rod 77 away from the extension column 71. A take-up shaft 79, the same number as the mounting bracket 61, is rotatably provided in the inner cavity 4. The other end of the connecting rope 78 is fixed on the corresponding take-up shaft 79 and is wound around the outer surface of the take-up shaft 79 in a winding manner. When the take-up shaft 79 rotates, it can wind or release the connecting rope 78. Since the connecting rod 77 is rotatably sleeved on the extension column 71, the connecting rod 77 can flexibly adjust its angle when the extension column 71 moves along the serpentine guide rail 76 with the slide rod 73, so as to avoid the connecting rope 78 being stuck due to force.

[0052] It should be noted that both ends of each set of take-up shafts 79 are rotatably connected to the inner cavity 4 through bearings, and one end of each set of take-up shafts 79 extends to the outside of the detection box 1. A drive assembly 8 is provided outside the detection box 1.

[0053] Specifically, refer to Figure 11 - Figure 12 The drive assembly 8 includes a motor 81, a half gear 82 fixed to the output end of the motor 81, a pinion 83 meshing with the half gear 82, a sprocket 85 fixed to the end of each set of take-up shafts 79, and a chain 86 meshing between the sprockets 85. The pinion 83 is fixed to one end of one set of take-up shafts 79. When the motor 81 starts, it drives the half gear 82 to rotate. The periodic meshing of the half gear 82 and the pinion 83 drives the take-up shafts 79 connected to it to rotate. Under the action of the sprockets 85 and the chain 86, multiple sets of take-up shafts 79 rotate synchronously, realizing the synchronous winding and unwinding of multiple sets of connecting ropes 78.

[0054] One end of one of the winding shafts 79 is also provided with a torsion spring 84. The two ends of the torsion spring 84 are fixed to the pinion 83 and the detection box 1, respectively. When the winding shaft 79 rotates, the torsion spring 84 twists and stores elastic potential energy. When the half gear 82 separates from the pinion 83, the torsion spring 84 releases the stored elastic potential energy, causing the pinion 83 to rotate in the opposite direction, thereby causing the winding shaft 79 to rotate in the opposite direction and releasing the connecting rope 78 wound on the winding shaft 79.

[0055] The drive assembly 8 also includes a maintenance cover 87 that is detachably mounted on the test box 1, wherein the motor 81 is mounted inside the maintenance cover 87.

[0056] Furthermore, the mounting bracket 61 is symmetrically provided with a spring-back mechanism 9, which is used to assist the mounting bracket 61 in resetting.

[0057] Specifically, refer to Figure 13 The rebound mechanism 9 includes a sleeve rod 91, a cavity 92 formed within the sleeve rod 91, a movable rod 93 inserted into the cavity 92, a stop block 94 fixed to one end of the movable rod 93, and a second spring 95 disposed on the surface of the movable rod 93. Both the stop block 94 and the second spring 95 are located within the cavity 92. The two ends of the second spring 95 are respectively fixed to the stop block 94 and the cavity 92. The stop block 94 prevents the movable rod 93 from detaching from the cavity 92. A first connecting seat 96 is hinged to the other end of the movable rod 93 and fixed to the mounting bracket 61. A second connecting seat 97 is hinged to the end of the sleeve rod 91 away from the movable rod 93, and a support is fixed to the second connecting seat 97. The bracket 98 is fixedly installed on the inner wall of the inner cavity 4. When the mounting frame 61 slides and swings along the serpentine guide rail 76 under the tension of the connecting rope 78, the movable rod 93 is stretched outwards into the cavity 92, and the second spring 95 is compressed. When the half gear 82 separates from the small gear 83 and the tension of the winding shaft 79 on the connecting rope 78 disappears, the second spring 95 releases its elastic potential energy, thereby pulling the movable rod 93 to retract into the cavity 92. Through the first connecting seat 96, the mounting frame 61 moves in the opposite direction to achieve reset. At the same time, the hinge between the movable rod 93 and the first connecting seat 96, and the hinge between the sleeve rod 91 and the second connecting seat 97, can flexibly adapt to the angle changes when the mounting frame 61 swings.

[0058] The rebound mechanism 9 works in conjunction with the drive assembly 8 to form the reciprocating motion of the mounting frame 61. When the tension of the connecting rope 78 disappears, the elastic force of the second spring 95 drives the mounting frame 61 to reset, providing reverse power for the continuous reciprocating swing of the mounting frame 61, thereby improving the continuity and stability of the simulated vibration. The symmetrically arranged rebound mechanism 9 can make the forces on both sides of the mounting frame 61 balanced, preventing it from shifting or getting stuck during the reset process.

[0059] The present invention provides a working principle for a corrosion-resistant material performance testing device for air preheaters: During testing, the top cover 2 of the testing box 1 is first opened. According to the material size, the position and number of the abutment clamps 64 on the assembly slot 63 are adjusted by bolts 65. The material to be tested is placed between the mounting frame 61 and the moving plate 62. Then, the moving plate 62 is pulled to compress the first spring 663 on the first insert rod 662. After being released, the first spring 663 pushes the moving plate 62 to initially clamp the material. Then, the screw sleeve 665 on the second insert rod 664 is rotated to make it come into close contact with the connecting block 661, further enhancing the clamping force and completing the material fixation.

[0060] After closing the cover 2, the detection chamber 1 is started via the control device 3. The sprayer 5 in the inner cavity 4 begins to spray salt spray to simulate an acidic corrosion environment. At the same time, the motor 81 is started, which drives the half gear 82 to rotate. The half gear 82 and the small gear 83 mesh periodically, driving the connected take-up shaft 79 to rotate. With the cooperation of the sprocket 85 and the chain 86, multiple sets of take-up shafts 79 rotate synchronously and wind the connecting rope 78. The connecting rope 78 pulls the extension column 71 through the connecting rod 77, causing the two sets of sliding rods 73 on the connecting block 72 to slide along the serpentine guide rail 76 on the frame 75. At this time, the torsion spring 84 at one end of the take-up shaft 79... Driven by the sliding rod 73, the mounting frame 61 moves from the vertical section 762 into the serpentine section 761 and begins to swing. At the same time, the mounting frame 61 pulls the movable rod 93 of the rebound mechanism 9, causing the second spring 95 inside the sleeve rod 91 to compress and store energy. When the half gear 82 separates from the small gear 83, the torsion spring 84 releases its potential energy, causing the winding shaft 79 to rotate in the opposite direction and releasing the connecting rope 78. At the same time, the second spring 95 pushes the movable rod 93 to reset, causing the mounting frame 61 to slide in the opposite direction, making the sliding rod 73 reciprocate along the serpentine section 761, simulating the dynamic vibration and multi-directional erosion of the air preheater heat exchanger plates caused by boiler vibration and flue gas impact.

[0061] This invention provides a method for testing the corrosion resistance properties of materials used in air preheaters, employing equipment for testing the corrosion resistance properties of materials used in air preheaters, and comprising the following steps:

[0062] Step 1: Open the box cover 2, place the material to be tested between the mounting frame 61 and the moving plate 62, and use the telescopic component 66 to make the moving plate 62 cooperate with the mounting frame 61 to clamp and fix the material.

[0063] Step 2: Close the cover 2, start the test chamber 1 through the control device 3, so that the sprayer 5 in the inner cavity 4 starts to work and sprays salt spray into the inner cavity 4 to simulate an acidic corrosion environment;

[0064] Step 3: Start the motor 81. Under the action of the half gear 82, pinion 83, sprocket 85 and chain 86, the multiple sets of winding shafts 79 rotate synchronously to wind up and unwind the connecting rope 78.

[0065] Step 4: Pull the extension column 71 with the connecting rope 78 to make the slide bar 73 slide in the serpentine guide rail 76, and the mounting frame 61 drives the material to be tested to swing along the trajectory of the serpentine guide rail 76.

[0066] Step 5: During the testing process, the testing time and temperature are set using control device 3, and the corrosion of the material is observed during this period;

[0067] Step 6: After the test is completed, turn off motor 81 and sprayer 5, open the box cover 2, remove the tested material, observe and record its degree of corrosion, and complete the corrosion resistance test.

[0068] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A corrosion-resistant material performance testing device for air preheaters, comprising a testing chamber, a chamber cover, and control equipment, wherein the testing chamber has an inner cavity, and a sprayer is installed inside the inner cavity, characterized in that... It also includes mounting components located within the cavity; The mounting assembly includes multiple sets of mounting brackets disposed in the inner cavity and a movable plate disposed opposite to the mounting brackets. Each set of movable plates is provided with an assembly slot, and multiple sets of abutment clips are provided on the assembly slot. The abutment clips are detachably mounted on the assembly slot by bolts. A telescopic component is provided between the mounting brackets and the movable plate. The telescopic component allows the movable plate to fix the material to be tested on the mounting bracket. The mounting frame is symmetrically provided with swing components. The swing components include extension columns fixed at both ends of the mounting frame, connecting blocks fixed at the ends of the extension columns, two sets of sliding rods fixed on the connecting blocks, and sliding blocks fixed to the sliding rods. Two sets of frame sides are fixed in the inner cavity. The two sets of frame sides are symmetrically distributed along the length direction of the mounting frame. Each set of frame sides is provided with a serpentine guide rail with the same number as the mounting frame. The sliding rods are slidably connected in the corresponding serpentine guide rail. The swing assembly also includes a connecting rod rotatably sleeved on each set of extension columns. A connecting rope is fixed to one end of the connecting rod away from the extension column. A take-up shaft with the same number as the mounting bracket is rotatably provided in the inner cavity. The other end of the connecting rope is fixed on the corresponding take-up shaft and wound around the outer surface of the take-up shaft in a winding manner. One end of each set of take-up shafts extends outside the detection box. A drive assembly is provided outside the detection box. The drive assembly includes a motor, a half gear fixed to the output end of the motor, a pinion meshing with the half gear, a sprocket fixed to the end of each set of take-up shafts, and a chain meshing between the sprockets. The pinion is fixed to one end of one set of take-up shafts. The mounting bracket is symmetrically provided with a spring-loaded mechanism, which is used to assist the mounting bracket in resetting. The spring-loaded mechanism includes a sleeve rod, a cavity opened in the sleeve rod, a movable rod inserted into the cavity, a stop block fixed to one end of the movable rod, and a second spring provided on the surface of the movable rod. The other end of the movable rod is hinged to a first connecting seat, which is fixed to the mounting bracket. The end of the sleeve rod away from the movable rod is hinged to a second connecting seat, and a bracket is fixed on the second connecting seat. The bracket is fixedly installed on the inner wall of the inner cavity.

2. The corrosion resistance material performance testing equipment for air preheaters according to claim 1, characterized in that, One end of one of the winding shafts is also provided with a torsion spring, and the two ends of the torsion spring are respectively fixed to the pinion and the detection box.

3. The corrosion resistance material performance testing equipment for air preheaters according to claim 1, characterized in that, The serpentine guide rail includes a serpentine section and a vertical section that runs through and connects to both ends of the serpentine section. When the slide rod is slidably connected within the vertical section, the mounting frame is in a vertical state. When the slide rod is slidably connected within the serpentine section, the mounting frame is in a swinging state.

4. The corrosion resistance material performance testing equipment for air preheaters according to claim 1, characterized in that, The telescopic component includes a connecting block symmetrically fixed on the movable plate, a first insert rod that movably passes through the connecting block, and a first spring disposed on the first insert rod, with one end of the first insert rod fixed to the mounting bracket.

5. The corrosion resistance material performance testing equipment for air preheaters according to claim 4, characterized in that, The telescopic component also includes a second insert rod that can be moved through the connecting block. One end of the second insert rod is fixed to the mounting bracket. The surface of the second insert rod is threaded, and a threaded sleeve is threaded onto the surface of the second insert rod. The inner side of the threaded sleeve contacts the connecting block.

6. The corrosion resistance material performance testing equipment for air preheaters according to claim 1, characterized in that, The drive assembly also includes a detachable maintenance cover mounted on the testing box, wherein the motor is installed inside the maintenance cover.

7. A method for testing the corrosion resistance properties of materials used in air preheaters, employing the corrosion resistance material testing equipment for air preheaters described in claim 1, characterized in that... Includes the following steps: Step 1: Open the box cover, place the material to be tested between the mounting frame and the moving plate, and use the telescopic components to make the moving plate cooperate with the mounting frame to clamp and fix the material. Step 2: Close the lid and start the test chamber through the control device to make the sprayer in the inner cavity start working, spraying salt spray into the inner cavity to simulate an acidic corrosion environment; Step 3: Start the motor. Under the action of the half gear, pinion, sprocket and chain, multiple sets of winding shafts rotate synchronously to wind up and unwind the connecting rope. Step 4: Pull the extension column with the connecting rope to make the slide bar slide inside the serpentine guide rail, and the mounting frame will cause the material to be tested to swing along the trajectory of the serpentine guide rail; Step 5: During the testing process, the testing time and temperature are set by controlling the equipment, and the corrosion of the material is observed during this period; Step Six: After the test is completed, turn off the motor and sprayer, open the box cover, remove the tested material, observe and record its degree of corrosion, and complete the corrosion resistance test.

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