Stainless steel pipe seawater corrosion detection device

Abstract

The seawater corrosion detection device for the stainless steel pipe comprises a test pool, the test pool comprises a pool body, one side of the upper part of the pool body is fixedly connected with a synchronous clamping assembly, the synchronous clamping assembly is used for clamping a detected workpiece, and the inner wall of one end of the pool body is provided with a sea wave simulation assembly; the sea wave simulation assembly comprises a turning plate mechanism and a sea wave driving mechanism, the turning plate mechanism comprises at least one turning plate, a rotating shaft of the turning plate is hinged between mounting plates on the two sides of the turning plate, and each mounting plate is fixedly connected with the inner wall of one end of the pool body; the sea wave driving mechanism is connected with the overturning plate and can provide driving force for rotation of the overturning plate relative to a rotating shaft of the overturning plate. Compared with the prior art, the device has the technical effects that the device is provided with the turning plate mechanism, the movement of sea waves can be simulated, vivid detection working conditions can be given, and the test accuracy can be improved.

Description

Technical Field

[0001] The invention belongs to the technical field of stainless steel pipe detection, and particularly relates to a seawater corrosion detection device for stainless steel pipes. Background Art

[0002] Stainless steel pipe is a hollow, long, round steel bar widely used in industrial pipelines and mechanical components in the petroleum, chemical, medical, food, light industry, and instrumentation industries. Furthermore, its light weight, while maintaining the same bending and torsional strength, makes it widely used in the manufacture of mechanical parts and engineering structures. It is also commonly used in furniture and kitchenware. Due to its high corrosion resistance, stainless steel pipe is often used in marine projects, such as those transporting seawater. Seawater contains a large amount of salt, and the chloride ions contained in saltwater are one of the most corrosive substances in seawater. Furthermore, the action of waves exposes seawater to a large area of ​​air, dissolving oxygen from the air into the seawater. This dissolved oxygen significantly affects the corrosion rate of metals in seawater. Temperature also affects the solubility and diffusivity of dissolved oxygen. The diffusivity of oxygen in seawater increases with increasing seawater temperature. Corrosion rates also increase due to the increase in the limiting current density of the cathode redox reaction.

[0003] In order to ensure that stainless steel pipes have high corrosion resistance when in contact with seawater and extend their service life, it is necessary to conduct seawater corrosion testing on the produced stainless steel pipes. The existing testing usually uses seawater directly or test water with the same composition as seawater, and then immerses the stainless steel pipes in it for a period of time, and then takes out the stainless steel pipes to observe the corrosion conditions. Technical problem: The real seawater is in motion, and this static test will result in a decrease in test accuracy. Summary of the Invention

[0004] The technical problem to be solved by the present invention is: how to design a seawater corrosion detection device for stainless steel pipes that can simulate the movement of seawater, provide real working conditions, and improve test accuracy.

[0005] The technical solution of the present invention is specifically as follows: A seawater corrosion detection device for stainless steel pipes includes a test tank, which includes a tank body. A synchronous clamping assembly is fixedly connected to one side of the upper part of the tank body. The synchronous clamping assembly is used to clamp the workpiece to be inspected. A wave simulation assembly is provided on the inner wall of one end of the tank body; the wave simulation assembly includes a flip mechanism and a wave drive mechanism. The flip mechanism includes at least one flip plate. The rotating shaft of the flip plate is hinged between the mounting plates on both sides thereof. Each mounting plate is fixedly connected to the inner wall of one end of the tank body. The wave drive mechanism is connected to the flip plate and can provide driving force for the "rotation of the flip plate relative to its rotating shaft".

[0006] There are at least three flip plates in the upper and lower directions, each flip plate is hinged to its own mounting plate, and the two adjacent flip plates are connected by a linkage rod, so that the two adjacent flip plates, the linkage rod and the pool body form a four-bar linkage.

[0007] All the mounting plates are arranged in parallel, so that two upper and lower adjacent turning plates, the linkage rod and the pool body form a parallelogram four-bar linkage mechanism.

[0008] The wave drive mechanism is a wave drive motor, which is fixed on the test pool. Its output shaft is fixedly connected to the turntable. The eccentric shaft is fixed on the turntable. The eccentric shaft is hinged to one end of the drive connecting rod. The other end of the drive connecting rod is hinged to the vertical plate, and the vertical plate is fixed on the flip plate.

[0009] The synchronous clamping assembly includes a U-shaped mounting frame and multiple pairs of clamping parts. The U-shaped mounting frame is fixedly connected to the upper surface of the pool body. A clamping drive mechanism is provided on the U-shaped mounting frame. The clamping drive mechanism fixes the driving screw. A limiting rod is fixed between the inner walls on both sides of the U-shaped mounting frame; each pair of clamping parts includes a fixed clamping rod and a movable clamping rod. The clamping side surfaces of the ends of the fixed clamping rod and the movable clamping rod are provided with mutually matching clamping heads. One end of the fixed clamping rod is fixedly connected to the limiting rod, a through hole is provided on the fixed clamping rod, and the driving screw passes through the through hole, one end of the movable clamping rod is slidably connected to the limiting rod, and a threaded hole is provided on the movable clamping rod, and the threaded hole is threadedly matched with the driving screw.

[0010] The clamping drive mechanism is a clamping drive motor, which is fixed on one side surface of the U-shaped mounting frame, and one end of its output shaft is fixedly connected to the drive screw; one side surface of each clamp is set in an arc shape.

[0011] A heating rod is fixed on one side of the upper surface of the pool body, and the heating part of the heating rod extends into the interior of the pool body. A partition is provided between the inner walls of the pool body, and the partition divides the interior of the pool body into a test chamber and a heating chamber. The heating part of the heating rod is located in the heating chamber. The test chamber is provided with several groups of vertically distributed heating pipes. Each group of heating pipes is located between two adjacent clamping mechanisms, and one end of each heating pipe is connected to the heating chamber.

[0012] A water flow pipe is arranged in the heating pipe, a plurality of support frames are arranged on the outer wall of the water flow pipe, and a water pump is arranged at the end of the water flow pipe.

[0013] Compared with the prior art, the technical effect of the present invention is that the present invention is provided with a flap mechanism, which can simulate the movement of waves, provide realistic detection conditions, and improve test accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic three-dimensional diagram of the overall structure of the present invention.

[0015] Figure 2It is a schematic three-dimensional diagram of the overall cross-sectional structure of the present invention.

[0016] Figure 3 It is a schematic three-dimensional diagram of the overall structure of the synchronous clamping assembly.

[0017] Figure 4 It is a schematic three-dimensional diagram of the overall structure of the wave simulation component.

[0018] Figure 5 It is a schematic three-dimensional diagram of the overall structure of the test pool.

[0019] Figure 6 It is a cross-sectional diagram of the heating pipe. DETAILED DESCRIPTION

[0020] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments thereof.

[0021] like Figure 1-2 A stainless steel pipe seawater corrosion detection device includes a test pool 1, which includes a pool body 101. A synchronous clamping component 2 is fixedly connected to one side of the upper part of the pool body 101. The synchronous clamping component 2 is used to clamp the workpiece to be tested (stainless steel pipe). A wave simulation component 3 is provided on the inner wall of one end of the pool body 101.

[0022] like Figure 4 The wave simulation component 3 includes a flip plate mechanism and a wave driving mechanism. The flip plate mechanism includes at least one flip plate 302. The rotating shaft of the flip plate 302 is hinged between the mounting plates 301 on both sides thereof. Each mounting plate 301 is fixedly connected to the inner wall of one end of the pool body 101. The wave driving mechanism is connected to the flip plate 302 and can provide driving force for the "rotation of the flip plate 302 relative to its rotating shaft".

[0023] like Figure 4 The wave drive mechanism is a wave drive motor 308, which is fixed on the test pool 1, and its output shaft is fixedly connected to the turntable 307. The eccentric shaft 306 is fixed on the turntable 307. The eccentric shaft 306 is hinged to one end of the driving connecting rod 305, and the other end of the driving connecting rod 305 is hinged to the vertical plate 304, and the vertical plate 304 is fixed on the flip plate 302.

[0024] In order to better simulate ocean waves and make the water in the test pool 1 generate waves as a whole, further improvements are made as follows: like Figure 4 There are at least three flip plates 302 in the upper and lower directions, and each flip plate 302 is hinged to its own mounting plate 301. As mentioned above, the two adjacent flip plates 302 are connected by a linkage rod 303, so that the two adjacent flip plates 302, the linkage rod 303 and the pool body 101 form a four-bar linkage mechanism.

[0025] like Figure 4All the mounting plates 301 are arranged in parallel, so that the two upper and lower adjacent flip plates 302, the linkage rod 303, and the pool body 101 form a parallelogram four-bar linkage mechanism.

[0026] Each flip plate 302 is rotatably mounted between the mounting plates 301 on both sides, and all the flip plates 302 are connected by a linkage rod 303. Therefore, driven by the wave drive mechanism, all the flip plates 302 will swing up and down synchronously, thereby stirring the water inside the pool body 101, simulating the corrosion caused by the impact of seawater flow on the stainless steel pipe. At the same time, the water inside the pool body 101 will increase its contact area with the air after being stirred, which can relatively increase the oxygen content of the test water to simulate the corrosion of the stainless steel pipe by oxygen in seawater, improve the authenticity of the test, and relatively ensure the accuracy of the test.

[0027] The wave-driven motor 308 drives the turntable 307 to rotate, thereby driving the eccentric shaft 306 to perform circular motion. The eccentric shaft 306 and the flip plate 302 at the top are connected by a driving connecting rod 305. Therefore, when the eccentric shaft 306 performs circular motion, it will drive all the flip plates 302 to swing up and down synchronously, thereby stirring the test water inside the pool body 101, simulating the real seawater flow conditions and increasing the contact area between the test water and the air to accelerate the dissolution of oxygen in the water and increase the oxygen content of the test water.

[0028] See also Figure 3 The synchronous clamping assembly 2 includes a U-shaped mounting frame 201 and multiple pairs of clamping parts. The U-shaped mounting frame 201 is fixedly connected to the upper surface of the pool body 101. A clamping drive mechanism is provided on the U-shaped mounting frame 201. The clamping drive mechanism fixes the drive screw 203. A limiting rod 202 is fixed between the inner walls on both sides of the U-shaped mounting frame 201.

[0029] Each pair of clamping parts includes a fixed clamping rod 204 and a movable clamping rod 205. The clamping sides of the ends of the fixed clamping rod 204 and the movable clamping rod 205 are provided with mutually matching clamping heads 206. One end of the fixed clamping rod 204 is fixedly connected to the limiting rod 202. A through hole is provided on the fixed clamping rod 204, and the driving screw 203 passes through the through hole. One end of the movable clamping rod 205 is slidingly connected to the limiting rod 202. A threaded hole is provided on the movable clamping rod 205, and the threaded hole is threadedly matched with the driving screw 203.

[0030] The clamping drive mechanism is a clamping drive motor 207 . The clamping drive motor 207 is fixed on a side surface of the U-shaped mounting frame 201 , and one end of the output shaft is fixedly connected to the drive screw 203 .

[0031] The limiting rod 202 is used to install several groups of clamping mechanisms, and the driving screw 203 is connected to the clamping drive motor 207 to drive each group of clamping mechanisms to open, so that stainless steel pipes of different diameters can be clamped, reducing limitations in use, and under the drive of the clamping drive mechanism, all clamping mechanisms can be opened and closed synchronously to increase the number of stainless steel pipes in a test, thereby increasing the test samples to improve the detection accuracy.

[0032] One end of the fixed clamping rod 204 is fixedly connected to the limit rod 202, so the position of the fixed clamping rod 204 remains unchanged. One end of the movable clamping rod 205 is slidably connected to the limit rod 202, and is threadedly connected to the driving screw 203 through a threaded hole. Therefore, when the driving screw 203 rotates, the driving screw 203 can be independently displaced relative to the fixed clamping rod 204 according to the different rotation directions, thereby increasing or decreasing the distance between it and the fixed clamping rod 204, and thus adjusting the distance between the corresponding two opposite clamps 206 to adapt to stainless steel pipes of more diameters.

[0033] Furthermore, one side surface of each clamp 206 is arc-shaped.

[0034] The arc-shaped setting can better fit the outer wall of the stainless steel pipe, increase the contact area between the clamp 206 and the stainless steel pipe, thereby increasing the friction force, thereby obtaining a better clamping effect and ensuring stability during the test.

[0035] See also Figure 2 and Figure 5 A heating rod 4 is fixed on one side of the upper surface of the pool body 101, and the heating part of the heating rod 4 extends into the interior of the pool body 101. A partition 102 is provided between the inner walls of the pool body 101, and the partition 102 divides the interior of the pool body 101 into a test chamber 108 and a heating chamber 109. The heating part of the heating rod 4 is located in the heating chamber 109. The test chamber 108 is provided with several groups of vertically distributed heating pipes 103. Each group of heating pipes 103 is located between two adjacent clamping mechanisms, and one end of each heating pipe 103 is connected to the heating chamber 109.

[0036] The interior of the pool body 101 is divided into a test chamber 108 and a heating chamber 109 by a partition 102. During the test, test water with a simulated seawater composition is added to the test chamber 108, and fresh water is added to the heating chamber 109. The heating rod 4 heats the fresh water in the heating chamber 109, and the fresh water flows into all the heating pipes 103. The heat is evenly transferred to the test chamber 108 through the heating pipes 103, so that the test water can be evenly heated, thereby simulating the corrosion effect of different seawater temperatures on stainless steel pipes and increasing the test scenarios.

[0037] like Figure 6In order to accelerate the heat conduction efficiency of the heating pipe, a water flow pipe 1031 is provided in the heating pipe 103. A plurality of support frames 1033 are provided on the outer wall of the water flow pipe 1031. A water pump 1032 is provided at the end of the water flow pipe 1031. When heat conduction needs to be accelerated, the water pump 1032 can be turned on, and the hot water in the heating chamber 109 enters the water flow pipe 1031 along the arrow 1034 and then flows into the heating pipe 103. The temperature of the heating pipe 103 becomes higher, which can accelerate the increase in the water temperature of the test chamber 108.

[0038] Working principle: During the test, test water with simulated seawater composition is added to the test chamber 108, and fresh water is added to the heating chamber 109. The heating rod 4 will heat the fresh water in the heating chamber 109, and the fresh water will flow to all the heating pipes 103. The heat will be evenly transferred to the test chamber 108 through the heating pipes 103, so that the test water can be evenly heated, thereby simulating the corrosion effect of different seawater temperatures on the stainless steel pipe. The wave drive motor 308 drives all the flip plates 302 to swing, thereby stirring the test water. In addition to simulating the corrosion effect of seawater flow on the stainless steel pipe, it can also increase the contact area between the test water and the air, so that the oxygen in the air is dissolved in the test water to simulate the oxidation corrosion of the stainless steel pipe by seawater. After the simulation conditions are adjusted, several stainless steel pipes of the same batch and specification are immersed in the test water and clamped and fixed using the synchronous clamping assembly 2. The number of test samples is increased, and the corrosion degree of all samples can be observed after the test is completed, thereby improving the accuracy of the stainless steel pipe corrosion test.

[0039] It should be noted that: The specific models and specifications of the clamping drive motor 207, the wave drive motor 308 and the heating rod 4 need to be selected and determined according to the actual specifications of the device. The specific selection calculation method adopts the existing technology in this field, so it will not be described in detail.

[0040] The power supply and principles of the clamping drive motor 207, the wave drive motor 308 and the heating rod 4 are clear to those skilled in the art and will not be described in detail here.

[0041] For other contents, please refer to the prior art.

[0042] The above description is only the preferred embodiment of the present invention. It should be pointed out that those skilled in the art can make several changes and improvements without departing from the overall concept of the present invention, and these should also be regarded as the scope of protection of the present invention.

Claims

1. A stainless steel pipe seawater corrosion detection device comprises a test tank (1), the test tank (1) comprises a tank body (101), a synchronous clamping assembly (2) is fixedly connected to one side of the upper portion of the tank body (101), and the synchronous clamping assembly (2) is used to clamp a workpiece to be detected, and is characterized in that: A wave simulation component (3) is provided on the inner wall of one end of the pool body (101); the wave simulation component (3) comprises a flap mechanism and a wave driving mechanism, the flap mechanism comprising at least one flip plate (302), the rotation axis of the flip plate (302) being hinged between the mounting plates (301) on both sides thereof, each mounting plate (301) being fixedly connected to the inner wall of one end of the pool body (101), and the wave driving mechanism being connected to the flip plate (302) and capable of providing driving force for "rotation of the flip plate (302) relative to its rotation axis".

2. The device for detecting seawater corrosion of stainless steel pipes according to claim 1, wherein: At least three flip plates (302) are provided in the upper and lower directions, each flip plate (302) is hinged to its own mounting plate (301), and two upper and lower adjacent flip plates (302) are connected via a linkage rod (303), so that the two upper and lower adjacent flip plates (302), the linkage rod (303), and the pool body (101) form a four-bar linkage mechanism.

3. The device for detecting seawater corrosion of stainless steel pipes according to claim 2, wherein: All the mounting plates (301) are arranged in parallel, so that the two upper and lower adjacent flip plates (302), the linkage rod (303), and the pool body (101) form a parallelogram four-bar linkage mechanism.

4. The device for detecting seawater corrosion of stainless steel pipes according to claim 3, wherein: The wave drive mechanism is a wave drive motor (308), which is fixed on the test pool (1), and its output shaft is fixedly connected to the turntable (307). The turntable (307) is fixed with an eccentric shaft (306), and the eccentric shaft (306) is hinged to one end of the driving connecting rod (305). The other end of the driving connecting rod (305) is hinged to the vertical plate (304), and the vertical plate (304) is fixed on the flip plate (302).

5. The device for detecting seawater corrosion of stainless steel pipes according to claim 4, characterized in that: The synchronous clamping assembly (2) includes a U-shaped mounting frame (201) and a plurality of pairs of clamping members. The U-shaped mounting frame (201) is fixedly connected to the upper surface of the pool body (101). A clamping drive mechanism is provided on the U-shaped mounting frame (201). The clamping drive mechanism fixes a drive screw (203). A limit rod (202) is fixed between the inner walls on both sides of the U-shaped mounting frame (201). Each pair of clamping members includes a fixed clamping rod (204) and a movable clamping rod (205), and the clamping side surfaces of the ends of the fixed clamping rod (204) and the movable clamping rod (205) are provided with mutually matching clamping heads (206), one end of the fixed clamping rod (204) is fixedly connected to the limit rod (202), the fixed clamping rod (204) is provided with a through hole, and the driving screw (203) passes through the through hole, one end of the movable clamping rod (205) is slidably connected to the limit rod (202), and the movable clamping rod (205) is provided with a threaded hole, and the threaded hole is threadedly matched with the driving screw (203).

6. The device for detecting seawater corrosion of stainless steel pipes according to claim 5, wherein: The clamping drive mechanism is a clamping drive motor (207), which is fixed to a side surface of the U-shaped mounting frame (201), and one end of the output shaft of the clamping drive motor (207) is fixedly connected to the drive screw (203); One side surface of each clamp (206) is arranged in an arc shape.

7. The device for detecting seawater corrosion of stainless steel pipes according to claim 6, wherein: A heating rod (4) is fixed on one side of the upper surface of the cell body (101), and the heating portion of the heating rod (4) extends into the interior of the cell body (101). A partition (102) is provided between the inner walls of the cell body (101), and the partition (102) divides the interior of the cell body (101) into a test chamber (108) and a heating chamber (109). The heating portion of the heating rod (4) is located in the heating chamber (109), and the test chamber (108) is provided with a plurality of groups of vertically distributed heating pipes (103), each group of heating pipes (103) is located between two adjacent groups of clamping mechanisms, and one end of each heating pipe (103) is connected to the heating chamber (109).

8. The device for detecting seawater corrosion of stainless steel pipes according to claim 7, wherein: A water flow pipe (1031) is provided in the heating pipe (103), a plurality of support frames (1033) are provided on the outer wall of the water flow pipe (1031), and a water pump (1032) is provided at the end of the water flow pipe (1031).

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