Method and device for testing corrosion resistance of coating

Abstract

The invention discloses a coating corrosion resistance testing method and device, and relates to the technical field of coating corrosion resistance testing, the coating corrosion resistance testing device comprises a supporting plate and a square steel pipe, the supporting plate is fixedly connected with a supporting frame, the supporting frame is fixedly connected with a connecting seat, and the coating corrosion resistance testing device further comprises a uniform spraying mechanism arranged on the connecting seat, the spraying device is used for uniformly spraying an anti-corrosion coating onto the square steel pipe; the feeding mechanism is arranged on the uniform spraying mechanism and is used for feeding the square steel pipe into a detection area; the paint baking mechanism is arranged below the connecting base and used for accelerating drying of the anti-corrosion coating on the square steel pipe. The whole testing process is highly automatic, manual intervention is reduced from spraying, drying to mixture testing, workers do not need to hold workpieces by hands for spraying, the operation difficulty and the labor cost are reduced, and meanwhile the testing reliability and stability are improved through the automatic process.

Description

Technical Field

[0001] The invention belongs to the technical field of coating anti-corrosion performance testing, and specifically relates to a coating anti-corrosion performance testing method and device. Background Art

[0002] In modern industry, metal pipes are widely used due to their good electrical conductivity, thermal conductivity and mechanical strength. However, metals are prone to corrosion in harsh environments such as humidity, acid and alkali, which not only shortens the service life of metal pipes, but also may cause safety hazards such as leakage. Therefore, it is particularly important to protect metal pipes by spraying anti-corrosion coatings. Before the coating is produced, in order to ensure that it can play a good anti-corrosion performance in different acid and alkalinity environments, relevant performance tests are an essential link.

[0003] The publication number is CN221506638U, which discloses a corrosion-resistant material performance testing device, including a test box, a feed assembly and a detection assembly, wherein the feed assembly is arranged on the test box, and the detection assembly is arranged in the test box; the feed assembly includes a lead screw, a lead screw pair 1, a hydraulic cylinder and a fixing part, the side wall of the test box is provided with an opening, the two ends of the lead screw are rotatably arranged on the inner side wall of the test box, the lead screw pair 1 is threadedly connected with the lead screw and slidably arranged on the inner top wall of the test box, the fixed end of the hydraulic cylinder is arranged on the lead screw pair 1, and the fixing part is arranged on the hydraulic cylinder. The invention belongs to the technical field of testing devices, and specifically refers to a corrosion-resistant material performance testing device.

[0004] However, the above patent has many limitations in the implementation process. For example, the testing process often requires a lot of manual intervention, which is not only complicated to operate and has high labor costs, but also difficult to ensure the reliability and stability of the test. In addition, the spraying method often cannot achieve comprehensive and uniform spraying of the outer surface of the workpiece, resulting in uneven coating distribution, affecting the accuracy of the test. More importantly, before placing the test piece into the test area, it is necessary to manually spray the workpiece with anti-corrosion coating, which is not convenient for holding the workpiece, and it takes a lot of time to dry the workpiece after spraying, which prolongs the test cycle and reduces work efficiency. Summary of the invention

[0005] In order to solve the problems raised by the above background technology, the present invention proposes a coating anti-corrosion performance testing method and device.

[0006] The purpose of the present invention can be achieved by the following technical solutions: A method for testing the anti-corrosion performance of a coating comprises the following steps: S1. The inner wall of the square steel pipe is clamped and fixed by a clamping mechanism, and then the square steel pipe is driven through the uniform spraying mechanism area by a feeding mechanism, and the anti-corrosion coating is uniformly sprayed on the surface of the square steel pipe by the uniform spraying mechanism; S2, using the feeding mechanism to continue to drive the square steel pipe to move downward and reach the area of ​​the paint baking mechanism, and then baking the anti-corrosion coating on the surface of the square steel pipe through the paint baking mechanism; S3. Pump the acidic solution or alkaline solution in the feeding barrel into the mixing barrel through the delivery pump to adjust the pH value inside the mixing barrel. Then, drive the square steel pipe through the area of ​​the paint baking mechanism into the mixing barrel through the feeding mechanism to test the anti-corrosion performance of the coating under a specific pH value environment.

[0007] As a further preferred embodiment of the present technical solution: a coating anti-corrosion performance testing device comprises a support plate and a square steel pipe, the support plate is fixedly connected to a support frame, the support frame is fixedly connected to a connecting seat, and further comprises: A uniform spraying mechanism, arranged on the connecting seat, is used to uniformly spray the anti-corrosion coating onto the square steel pipe; A feeding mechanism, arranged on the uniform spraying mechanism, is used to feed the square steel pipe into the inspection area; The paint baking mechanism is arranged below the connection seat and is used to accelerate the drying of the anti-corrosion coating on the square steel pipe; The material receiving mechanism is arranged below the paint baking mechanism and is used to receive the anti-corrosion coating dripping during the spraying process of the uniform spraying mechanism; The detection mechanism is arranged below the material receiving mechanism and is used to detect the anti-corrosion performance of the square steel pipe in environments with different acidity and alkalinity.

[0008] As a further preferred embodiment of the present technical solution: the uniform spraying mechanism comprises a driving gear rotatably connected to a connecting seat, the driving gear meshing with a driven gear ring, the driven gear ring meshing with a plurality of driven gears distributed in an array, each of the driven gears is fixedly connected to a No. 1 rotating shaft, the upper end of the No. 1 rotating shaft is fixedly connected to an incomplete gear, an annular frame is arranged on the outer side of the incomplete gear, the inner side wall of the annular frame is arranged with internal teeth meshing with the incomplete gear, one end of the annular frame is fixedly connected to a limiting rod, the other end of the annular frame is fixedly connected to a No. 2 connecting block, the No. 2 connecting block is rotatably connected with two groups of symmetrically distributed No. 1 connecting rods, and each of the No. 1 connecting rods is rotatably connected to a spray head at one end away from the No. 2 connecting block; It also includes a driving assembly, which is arranged on the connecting seat and is used to drive the driving gear to rotate.

[0009] As a further preferred embodiment of the present technical solution: the feeding mechanism includes a screw rod fixedly connected to the upper end of the driving gear, a movable frame is threadedly connected to the screw rod, and a No. 1 fixed rod is fixedly connected to the lower end of the movable frame.

[0010] As a further preferred embodiment of the present technical solution: the paint baking mechanism includes a No. 2 fixing rod fixedly connected to the support frame, the No. 2 fixing rod is fixedly connected to a fixing shell, the fixing shell is provided with No. 2 fixing seats distributed in a circular array, each of the No. 2 fixing seats is installed with an electric fan assembly, and an electric heating assembly is installed on the inner side of the fixing shell.

[0011] As a further preferred embodiment of the present technical solution: the detection mechanism includes two adding barrels for placing acidic solution and alkaline solution respectively and a mixing barrel for placing acid-base mixed solution, a delivery pump for pumping the solution inside the adding barrel into the mixing barrel is arranged between the adding barrel and the mixing barrel, a pH meter for measuring the pH value inside the mixing barrel is arranged on the mixing barrel, and a liquid discharge port is also arranged on the mixing barrel.

[0012] As a further preferred embodiment of the present technical solution: the material receiving mechanism includes a No. 2 rotating shaft rotatably connected to the mixing barrel, a No. 3 connecting block is fixedly connected to the No. 2 rotating shaft, a No. 3 connecting block is fixedly connected to the No. 3 connecting block, the No. 3 connecting block is fixedly connected to the material receiving plate, the upper end of the No. 2 rotating shaft is also fixedly connected to a No. 3 bevel gear, the No. 3 bevel gear is meshingly connected to a No. 4 bevel gear, and the No. 4 bevel gear is rotatably connected to the No. 3 connecting block, the No. 4 bevel gear is fixedly connected to a connecting shaft, and the end of the connecting shaft away from the No. 4 bevel gear is fixedly connected to a circular gear.

[0013] As a further preferred embodiment of the present technical solution: a rack for driving the circular gear to rotate is fixedly connected to the movable frame.

[0014] As a further preferred embodiment of the present technical solution: a clamping mechanism is installed at the lower end of the feeding mechanism; The clamping mechanism includes a No. 1 fixing seat fixedly connected to the lower end of a No. 1 fixing rod, the No. 1 fixing seat is rotatably connected to a driving shaft, the driving shaft is provided with a rotating wheel, the driving shaft is also fixedly connected to a No. 1 gear, the No. 1 gear is meshed with a No. 2 bevel gear, a screw is fixedly connected inside the No. 2 bevel gear, and the screw is rotatably connected to the No. 1 fixing seat, the lower end of the screw is threadedly connected to a threaded sleeve, the lower end of the threaded sleeve is provided with an articulated seat, two symmetrically distributed No. 2 connecting rods are hinged on the articulated seat, the lower end of each of the No. 2 connecting rods is rotatably connected to a No. 3 connecting rod, the No. 3 connecting rod is fixedly connected to a clamping block, and the No. 3 connecting rod is slidably connected to the No. 1 fixing seat.

[0015] As a further preferred embodiment of the present technical solution: the driven gear ring and the No. 1 rotating shaft are both rotatably connected to the connecting seat, and a No. 1 connecting block arranged in an array is fixedly connected to the outer wall of the connecting seat, and each of the No. 1 connecting blocks is provided with a sliding groove that is slidably connected to the corresponding upper limit rod, and a square seat is also fixedly connected to the support frame, and the nozzle is rotatably connected to the square seat.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. In the present invention, the entire test process is highly automated, from spraying, drying to mixed body testing, reducing manual intervention, and eliminating the need for workers to hold the workpiece for spraying, thereby reducing operational difficulty and labor costs. At the same time, this automated process also improves the reliability and stability of the test.

[0017] 2. In the present invention, the square steel pipes at the same height are evenly sprayed by the uniform spraying mechanism, and the square steel pipes at different heights are sprayed by moving downward, and the four sides of the square steel pipes can be sprayed comprehensively and evenly, which significantly improves the spraying efficiency, ensures the uniform distribution of the coating on the surface of the steel pipe, and improves the accuracy of the test.

[0018] 3. In the present invention, the setting of the receiving tray effectively catches the anti-corrosion paint dropped during the spraying process, preventing it from falling into the mixing barrel and causing the mixing barrel to be difficult to clean. Moreover, before the square steel pipe enters the mixing barrel, it can automatically rotate to a position where it will not block the square steel pipe.

[0019] 4. In the present invention, the electric fan assembly and the electric heating assembly work together to accelerate the drying process of the anti-corrosion coating on the outer surface of the square steel pipe, thereby shortening the test cycle and improving work efficiency.

[0020] 5. In the present invention, the pH value inside the mixture can be easily adjusted through the feeding barrel and the delivery pump to meet different testing requirements. At the same time, the real-time monitoring of the pH meter ensures the accuracy and controllability of the test environment, providing a strong guarantee for the accurate evaluation of the anti-corrosion performance of the coating. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 It is a schematic diagram of the local three-dimensional structure of the present invention Figure 1 ; Figure 3 It is a schematic diagram of the local three-dimensional structure of the present invention Figure 2 ; Figure 4 for Figure 3 The enlarged schematic diagram at A in the middle; Figure 5 It is a schematic diagram of the local three-dimensional structure of the present invention Figure 3 ; Figure 6 It is a partial structural cross-sectional view of the present invention; Figure 7 It is a schematic diagram of the local three-dimensional structure of the present invention Figure 4 ; Figure 8 for Figure 7 Enlarged schematic diagram at point C in the middle.

[0022] Legend: 1. Support plate; 2. Support frame; 3. Connecting seat; 4. Uniform spraying mechanism; 41. Driving gear; 42. Driven gear ring; 43. Connecting block No. 1; 44. Slide; 45. Limit rod; 46. Driven gear; 47. Rotating shaft No. 1; 48. Incomplete gear; 49. Ring frame; 410. Internal teeth; 411. Connecting block No. 2; 412. Connecting rod No. 1; 413. Spray head; 414. Square seat; 5. Feeding mechanism; 51. Screw; 52. Moving frame; 53. Fixed rod No. 1; 6. Clamping mechanism; 61. Fixed seat No. 1; 62. Driving shaft; 63. Rotating wheel; 64. Gear No. 1; 65. Bevel gear No. 2; 66 , screw; 67, threaded sleeve; 68, hinged seat; 69, No. 2 connecting rod; 610, No. 3 connecting rod; 611, clamping block; 7, material receiving mechanism; 71, No. 3 connecting block; 72, material receiving plate; 73, No. 2 rotating shaft; 74, No. 3 bevel gear; 75, No. 4 bevel gear; 76, connecting shaft; 77, circular gear; 8, rack; 9, paint baking mechanism; 91, No. 2 fixing rod; 92, fixing shell; 93, No. 2 fixing seat; 94, electric fan assembly; 95, electric heating assembly; 10, detection mechanism; 101, feeding barrel; 102, conveying pump; 103, mixing barrel; 104, liquid discharge port; 105, PH meter; 11, square steel pipe. DETAILED DESCRIPTION

[0023] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] Embodiment 1: See also Figure 1-Figure 8 The present application provides a method for testing the anti-corrosion performance of a coating, comprising the following steps: S1. The inner wall of the square steel pipe 11 is clamped and fixed by the clamping mechanism 6, and then the square steel pipe 11 is driven by the feeding mechanism 5 to pass through the area of ​​the uniform spraying mechanism 4, and the anti-corrosion coating is uniformly sprayed on the surface of the square steel pipe 11 by the uniform spraying mechanism 4; S2, using the feeding mechanism 5 to continue to drive the square steel tube 11 to move downward and reach the area of ​​the paint baking mechanism 9, and then the anti-corrosion coating on the surface of the square steel tube 11 is baked by the paint baking mechanism 9; S3, pumping the acidic solution or alkaline solution in the adding barrel 101 into the mixing barrel 103 through the delivery pump 102, adjusting the pH value in the mixing barrel 103, and then driving the square steel pipe 11 through the area of ​​the paint baking mechanism 9 into the mixing barrel 103 through the feeding mechanism 5, and testing the anti-corrosion performance of the coating under a specific pH value environment; A coating anti-corrosion performance testing device comprises a support plate 1 and a square steel pipe 11, wherein a support frame 2 is fixedly connected to the support plate 1, a connecting seat 3 is fixedly connected to the support frame 2, and a uniform spraying mechanism 4 is arranged on the connecting seat 3, which is used to uniformly spray the anti-corrosion coating onto the square steel pipe 11; a feeding mechanism 5 is arranged on the uniform spraying mechanism 4, which is used to feed the square steel pipe 11 into a detection area; a baking paint mechanism 9 is arranged below the connecting seat 3, which is used to accelerate the drying of the anti-corrosion coating on the square steel pipe 11; a receiving mechanism 7 is arranged below the baking paint mechanism 9, which is used to receive the anti-corrosion coating dripped during the spraying process of the uniform spraying mechanism 4; a detection mechanism 10 is arranged below the receiving mechanism 7, which is used to detect the anti-corrosion performance of the square steel pipe 11 in different acidity and alkalinity environments; the entire testing process is highly automated, from spraying, drying to mixed body testing, which reduces manual intervention, does not require staff to hold workpieces for spraying, reduces operation difficulty and labor costs, and at the same time, this automated process also improves the reliability and stability of the test.

[0025] Embodiment 2: On the basis of the first embodiment, the uniform spraying mechanism 4 includes a driving gear 41 rotatably connected to the connecting seat 3, the driving gear 41 is meshed with a driven gear ring 42, the driven gear ring 42 is meshed with a plurality of driven gears 46 distributed in an array, each driven gear 46 is fixedly connected to a No. 1 rotating shaft 47, the upper end of the No. 1 rotating shaft 47 is fixedly connected to an incomplete gear 48, an annular frame 49 is provided on the outer side of the incomplete gear 48, and an inner tooth 410 meshing with the incomplete gear 48 is provided on the inner side wall of the annular frame 49, one end of the annular frame 49 is fixedly connected to a limiting rod 45, and the other end of the annular frame 49 is fixedly connected to a No. 2 connecting block 411 , two groups of symmetrically distributed No. 1 connecting rods 412 are rotatably connected to the No. 2 connecting block 411, and one end of each No. 1 connecting rod 412 away from the No. 2 connecting block 411 is rotatably connected to a nozzle 413; it also includes a driving assembly, which is arranged on the connecting seat 3 and is used to drive the active gear 41 to rotate, and the driven gear ring 42 and the No. 1 rotating shaft 47 are both rotatably connected to the connecting seat 3, and the outer wall of the connecting seat 3 is fixedly connected with No. 1 connecting blocks 43 arranged in an array, and each No. 1 connecting block 43 is provided with a slide groove 44 that is slidably connected to the corresponding upper limit rod 45, and a square seat 414 is also fixedly connected to the support frame 2, and the nozzle 413 is rotatably connected to the square seat 414.

[0026] Specifically, the driving assembly drives the rotation of the active gear 41, the active gear 41 drives the driven gear ring 42 to rotate, the driven gear ring 42 drives at least four driven gears 46 arranged in a ring array to rotate, and because the square steel pipe 11 used in this test is square, four driven gears 46 are preferably used, each driven gear 46 drives the No. 1 rotating shaft 47 thereon to rotate, the No. 1 rotating shaft 47 drives the incomplete gear 48 to rotate, the incomplete gear 48 first meshes with the inner teeth 410 of one of the inner side walls on the annular frame 49, pushing the annular frame 49 to move, and the limiting rod 45 slides inside the slide groove 44 on the No. 1 connecting block 43 for limiting, the annular frame 49 drives the No. 2 connecting block 411 to move, the No. 2 connecting block 411 drives the No. 1 connecting rod 412 to rotate, the No. 1 connecting rod 412 drives the nozzle 413 to rotate around the square seat 414, and the two adjacent nozzles 413 rotate in opposite directions. As the incomplete gear 48 rotates, the incomplete gear 48 and the other side of the annular frame 49 are engaged. The inner teeth 410 on the wall are meshed, and the inner teeth 410 drives the second connecting block 411 to move in the opposite direction, and then the direction of rotation of the No. 1 connecting rod 412 is also opposite, and the No. 1 connecting rod 412 drives the nozzle 413 on it to move in the opposite direction, and the anti-corrosion coating paint is sprayed onto the surface of the square steel pipe 11 through the external sprayer connected to the multiple nozzles 413 through the pipeline, and the square steel pipe 11 clamped by the clamping mechanism 6 is driven to move slowly downward through the cooperation of the feeding mechanism 5, and the square steel pipe 11 is The outer surfaces at different heights are sprayed, so that the four sides of the square steel pipe 11 are fully and evenly sprayed, which is more efficient. There is no need for the staff to hold the square steel pipe 11 for spraying, and the spraying efficiency is not high. The square steel pipe 11 can be sprayed in the process of being placed in the acid and alkali solution to reduce the operation steps. As the feeding mechanism 5 drives the square steel pipe 11 out of the area of ​​the feeding mechanism 5, the external sprayer is turned off at this time, so that the nozzle 413 no longer sprays the anti-corrosion coating.

[0027] In this embodiment, the feeding mechanism 5 includes a screw rod 51 fixedly connected to the upper end of the driving gear 41 , a moving frame 52 is threadedly connected to the screw rod 51 , and a No. 1 fixed rod 53 is fixedly connected to the lower end of the moving frame 52 .

[0028] Specifically, when the driving assembly drives the active gear 41 to rotate, the active gear 41 will drive the screw rod 51 to rotate. The rotation of the screw rod 51 can make the movable frame 52 move linearly downward along the screw rod 51. The movable frame 52 drives the square steel pipe 11 clamped by the clamping mechanism 6 to move toward the area of ​​the uniform spraying mechanism 4 through the No. 1 fixed rod 53.

[0029] Embodiment three: On the basis of embodiment one, the paint baking mechanism 9 includes a No. 2 fixed rod 91 fixedly connected to the support frame 2, a fixed shell 92 is fixedly connected to the No. 2 fixed rod 91, and a No. 2 fixed seat 93 distributed in a circular array is provided on the fixed shell 92. An electric fan assembly 94 is installed on each No. 2 fixed seat 93, and an electric heating assembly 95 is installed on the inner side of the fixed shell 92.

[0030] Specifically, when the feeding mechanism 5 drives the square steel pipe 11 into the area of ​​the paint baking mechanism 9, the electric fan assembly 94 and the electric heating assembly 95 are started. The electric fan assembly 94 and the electric heating assembly 95 are existing technologies. The electric heating assembly 95 is heated by powering on, and then the hot air is blown to the outer surface of the square steel pipe 11 through the electric fan assembly 94, thereby accelerating the adhesion of the anti-corrosion coating to the outer surface of the square steel pipe 11. At this point, the drying of the anti-corrosion coating can be accelerated, the time period for testing the anti-corrosion performance of the coating can be reduced, and the work efficiency is high.

[0031] Embodiment 4: On the basis of the first embodiment, the material receiving mechanism 7 includes a No. 2 rotating shaft 73 rotatably connected to the mixing barrel 103, a No. 3 connecting block 71 is fixedly connected to the No. 2 rotating shaft 73, a No. 3 connecting block 71 is fixedly connected to a material receiving plate 72, the upper end of the No. 2 rotating shaft 73 is also fixedly connected to a No. 3 bevel gear 74, the No. 3 bevel gear 74 is meshingly connected to a No. 4 bevel gear 75, and the No. 4 bevel gear 75 is rotatably connected to the No. 3 connecting block 71, a connecting shaft 76 is fixedly connected to the No. 4 bevel gear 75, and a circular gear 77 is fixedly connected to the end of the connecting shaft 76 away from the No. 4 bevel gear 75, and a rack 8 for driving the circular gear 77 to rotate is fixedly connected to the movable frame 52. The setting of the material receiving plate 72 can make the anti-corrosion paint dropped during the spraying process of the square steel pipe 11 by the uniform spraying mechanism 4 to be caught to prevent it from dripping into the mixing barrel 103, and to the mixing barrel 103. The subsequent cleaning is inconvenient, and when the square steel pipe 11 drives out of the area of ​​the paint baking mechanism 9, the rack 8 just fits with the circular gear 77 and pushes the connecting shaft 76 to rotate, and the connecting shaft 76 drives the fourth bevel gear 75 to rotate, and the fourth bevel gear 75 drives the third bevel gear 74 to rotate, and the third bevel gear 74 drives the second rotating shaft 73 to rotate around the mixing barrel 103, and the second rotating shaft 73 drives the receiving plate 72 to rotate, and can rotate from the top of the mixing barrel 103 to a position where it does not block the square steel pipe 11 before the square steel pipe 11 enters the mixing barrel 103. At this point, it is achieved that during the spraying process of the square steel pipe 11 by the uniform spraying mechanism 4, the dripping anti-corrosion paint can be caught to prevent it from falling into the inside of the mixing barrel 103, and when the square steel pipe 11 moves toward the inside of the mixing barrel 103, it can automatically rotate to a position where it does not block the square steel pipe 11.

[0032] Embodiment five: On the basis of the first embodiment, the detection mechanism 10 includes two adding barrels 101 for placing an acidic solution and an alkaline solution respectively, and a mixing barrel 103 for placing an acid-base mixed solution. A delivery pump 102 is arranged between the adding barrel 101 and the mixing barrel 103 for pumping the solution inside the adding barrel 101 into the mixing barrel 103. A pH meter 105 for measuring the pH value inside the mixing barrel 103 is arranged on the mixing barrel 103, and a liquid discharge port 104 is also arranged on the mixing barrel 103.

[0033] Specifically, before the square steel pipe 11 enters the mixing barrel 103, a certain ratio is installed in the adding barrels 101 on both sides of the mixing barrel 103 and pumped into the mixing barrel 103 through the delivery pump 102 to adjust the specific pH value, and the pH meter 105 is used to measure and display it. The pH meter 105 is an existing product and is only used for it. Under a specific pH value environment, the corrosion resistance of the coating is tested. After a specific time, the square steel pipe 11 is taken out, and the corrosion of the outer surface of the square steel pipe 11 is observed. After the test is completed, the measured acid and alkali solution can be discharged from the discharge port 104 through the discharge port 104.

[0034] Embodiment six: On the basis of embodiment 1, a clamping mechanism 6 is installed at the lower end of the feeding mechanism 5; the clamping mechanism 6 includes a No. 1 fixed seat 61 fixedly connected to the lower end of the No. 1 fixed rod 53, a driving shaft 62 is rotatably connected to the No. 1 fixed seat 61, a rotating wheel 63 is arranged on the driving shaft 62, a No. 1 gear 64 is also fixedly connected to the driving shaft 62, the No. 1 gear 64 is meshed with a No. 2 bevel gear 65, a screw 66 is fixedly connected inside the No. 2 bevel gear 65, and the screw 66 is rotatably connected to the No. 1 fixed seat 61, a threaded sleeve 67 is threadedly connected to the lower end of the screw 66, a hinged seat 68 is arranged at the lower end of the threaded sleeve 67, two symmetrically distributed No. 2 connecting rods 69 are hinged on the hinged seat 68, and the lower end of each No. 2 connecting rod 69 is rotatably connected to a No. 3 connecting rod 610, a clamping block 611 is fixedly connected to the No. 3 connecting rod 610, and the No. 3 connecting rod 610 is slidably connected to the No. 1 fixed seat 61.

[0035] Specifically, a section of square steel pipe 11 for testing is put on the outside of two clamping blocks 611, and the square steel pipe 11 is completely above the area of ​​uniform spraying mechanism 4 at this time, and the driving shaft 62 is rotated by rotating the rotating wheel 63, and the rotation of the driving shaft 62 drives the No. 1 gear 64 to rotate, and the No. 1 gear 64 drives the No. 2 bevel gear 65 to rotate, and the rotation of the No. 2 bevel gear 65 drives the screw 66 to rotate around the No. 1 fixed seat 61, and the rotation of the No. 1 fixed seat 61 causes the threaded sleeve 67 to move downward, and the threaded sleeve 67 pushes the two No. 2 connecting rods 69 to rotate around the hinged seat 68 through the hinged seat 68, so that the No. 3 connecting rod 610 pushes the clamping block 611 along the No. 1 fixed seat 61 to clamp and fix the inner wall of the square steel pipe 11, thereby ensuring the stability of the feeding mechanism 5 in the process of sending the square steel pipe 11 into the detection area.

[0036] The above embodiments are only used to illustrate the technical method of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical method of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical method of the present invention.

Claims

1. A coating anti-corrosion performance testing method, characterized in that: The following steps are involved: S1. The inner wall of the square steel pipe (11) is clamped and fixed by the clamping mechanism (6), and the square steel pipe (11) is driven by the feeding mechanism (5) to pass through the area of ​​the uniform spraying mechanism (4), and the anti-corrosion coating is uniformly sprayed on the surface of the square steel pipe (11) by the uniform spraying mechanism (4); S2, using the feeding mechanism (5) to continue to drive the square steel tube (11) to move downward and reach the area of ​​the paint baking mechanism (9), and then baking the anti-corrosion coating on the surface of the square steel tube (11) through the paint baking mechanism (9); S3. The acidic solution or alkaline solution in the feeding barrel (101) is pumped into the mixing barrel (103) by means of a delivery pump (102), and the pH value in the mixing barrel (103) is adjusted. The square steel pipe (11) is then driven by the feeding mechanism (5) to pass through the area of ​​the paint baking mechanism (9) and enter the mixing barrel (103), and the anti-corrosion performance of the coating under a specific pH value environment is tested.

2. A coating anti-corrosion performance testing device, comprising a support plate (1) and a square steel pipe (11), characterized in that: The support plate (1) is fixedly connected to a support frame (2), the support frame (2) is fixedly connected to a connection seat (3), and further comprises: A uniform spraying mechanism (4) is arranged on the connecting seat (3) and is used to uniformly spray the anti-corrosion coating onto the square steel pipe (11); A feeding mechanism (5) is arranged on the uniform spraying mechanism (4) and is used to feed the square steel pipe (11) into the detection area; A paint baking mechanism (9) is arranged below the connection seat (3) and is used to accelerate the drying of the anti-corrosion coating on the square steel pipe (11); A material receiving mechanism (7) is arranged below the paint baking mechanism (9) and is used to receive the anti-corrosion coating dripping during the spraying process of the uniform spraying mechanism (4); The detection mechanism (10) is arranged below the material receiving mechanism (7) and is used to detect the anti-corrosion performance of the square steel pipe (11) in environments with different acidity and alkalinity.

3. A coating anti-corrosion performance testing device according to claim 2, characterized in that: The uniform spraying mechanism (4) comprises a driving gear (41) rotatably connected to the connecting seat (3), the driving gear (41) being meshed with a driven gear ring (42), the driven gear ring (42) being meshed with a plurality of driven gears (46) distributed in an array, each of the driven gears (46) being fixedly connected to a first rotating shaft (47), an upper end of the first rotating shaft (47) being fixedly connected to an incomplete gear (48), and an annular frame (49) being arranged on the outer side of the incomplete gear (48). , an inner side wall of the annular frame (49) is provided with internal teeth (410) meshing with the incomplete gear (48), one end of the annular frame (49) is fixedly connected to a limit rod (45), the other end of the annular frame (49) is fixedly connected to a No. 2 connecting block (411), the No. 2 connecting block (411) is rotatably connected to two groups of symmetrically distributed No. 1 connecting rods (412), and one end of each No. 1 connecting rod (412) away from the No. 2 connecting block (411) is rotatably connected to a nozzle (413); It also includes a driving assembly, which is arranged on the connecting seat (3) and is used to drive the driving gear (41) to rotate.

4. A coating anti-corrosion performance testing device according to claim 3, characterized in that: The feeding mechanism (5) comprises a screw rod (51) fixedly connected to the upper end of the driving gear (41), a moving frame (52) being threadedly connected to the screw rod (51), and a first fixing rod (53) being fixedly connected to the lower end of the moving frame (52).

5. A coating anti-corrosion performance testing device according to claim 4, characterized in that: The paint baking mechanism (9) comprises a No. 2 fixing rod (91) fixedly connected to the support frame (2); a fixing shell (92) is fixedly connected to the No. 2 fixing rod (91); the fixing shell (92) is provided with No. 2 fixing seats (93) distributed in a ring array; each of the No. 2 fixing seats (93) is mounted with an electric fan assembly (94); and an electric heating assembly (95) is mounted on the inner side of the fixing shell (92).

6. A coating anti-corrosion performance testing device according to claim 3, characterized in that: The detection mechanism (10) comprises two material adding barrels (101) for respectively placing an acid solution and an alkaline solution, and a mixing barrel (103) for holding an acid-base mixed solution. A delivery pump (102) for pumping the solution in the material adding barrel (101) into the mixing barrel (103) is provided between the material adding barrel (101) and the mixing barrel (103). A pH meter (105) for measuring the pH value in the mixing barrel (103) is provided on the mixing barrel (103), and a liquid discharge port (104) is also provided on the mixing barrel (103).

7. A coating anti-corrosion performance testing device according to claim 4, characterized in that: The material receiving mechanism (7) comprises a No. 2 rotating shaft (73) rotatably connected to the mixing barrel (103), a No. 3 connecting block (71) being fixedly connected to the No. 2 rotating shaft (73), a No. 3 connecting block (71) being fixedly connected to the No. 3 connecting block (71), a material receiving plate (72) being fixedly connected to the No. 3 bevel gear (74) being fixedly connected to the upper end of the No. 2 rotating shaft (73), a No. 4 bevel gear (75) being meshingly connected to the No. 3 bevel gear (74), and the No. 4 bevel gear (75) being rotatably connected to the No. 3 connecting block (71), a connecting shaft (76) being fixedly connected to the No. 4 bevel gear (75), and a circular gear (77) being fixedly connected to one end of the connecting shaft (76) away from the No. 4 bevel gear (75).

8. A coating anti-corrosion performance testing device according to claim 7, characterized in that: A rack (8) is fixedly connected to the movable frame (52) and is used to drive the circular gear (77) to rotate.

9. A coating anti-corrosion performance testing device according to claim 4, characterized in that: A clamping mechanism (6) is installed at the lower end of the feeding mechanism (5); The clamping mechanism (6) comprises a No. 1 fixing seat (61) fixedly connected to the lower end of a No. 1 fixing rod (53); a driving shaft (62) is rotatably connected to the No. 1 fixing seat (61); a rotating wheel (63) is arranged on the driving shaft (62); a No. 1 gear (64) is also fixedly connected to the driving shaft (62); a No. 1 gear (64) is meshed with a No. 2 bevel gear (65); a screw (66) is fixedly connected inside the No. 2 bevel gear (65); and the screw (66) is connected to the No. 1 fixing seat (61). ) is rotatably connected, the lower end of the screw rod (66) is threadedly connected to a threaded sleeve (67), the lower end of the threaded sleeve (67) is provided with an articulated seat (68), two symmetrically distributed No. 2 connecting rods (69) are hinged on the articulated seat (68), the lower end of each No. 2 connecting rod (69) is rotatably connected to a No. 3 connecting rod (610), the No. 3 connecting rod (610) is fixedly connected to a clamping block (611), and the No. 3 connecting rod (610) is slidably connected to the No. 1 fixed seat (61).

10. A coating anti-corrosion performance testing device according to claim 3, characterized in that: The driven gear ring (42) and the No. 1 rotating shaft (47) are both rotatably connected to the connecting seat (3); the outer wall of the connecting seat (3) is fixedly connected to the No. 1 connecting blocks (43) arranged in an array; each of the No. 1 connecting blocks (43) is provided with a sliding groove (44) slidably connected to the corresponding upper limit rod (45); the support frame (2) is also fixedly connected to the square seat (414); and the nozzle (413) is rotatably connected to the square seat (414).

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