Sample mechanism for marine corrosion primary process detection

Abstract

The invention relates to the field of laser detection, in particular to a sample mechanism for marine corrosion primary process detection, which comprises a sample box, a sample loading device for placing a sample plate is arranged in the sample box, and one side of the sample box is provided with an excitation interface and a detection interface. The upper portion of the communication port is connected with a three-way connector, the other two connectors of the three-way connector are used for air exhaust and water dripping respectively, the connector for air exhaust is connected with a vacuumizing pump, and the connector for water dripping is matched with a plugging cover. And the water dripping joint is connected with a water dripping pipe matched with a sample plate on the sample loading device. The communicating port is matched with the three-way joint, so that the vacuumizing operation can be completed through the communicating port, and meanwhile, the dripping operation can also be completed, so that the sample plate simulates a sample environment in which seawater is immersed, and a more accurate detection effect can be obtained.

Description

Technical Field

[0001] The present invention relates to the field of laser detection, and particularly to a sample mechanism for detecting the initial process of marine corrosion. Background Art

[0002] The initial process of marine corrosion is accompanied by physical and chemical reactions such as the formation and breakage of chemical bonds, structural phase changes, electron vibration rotation and transport, and multi-degree-of-freedom interactions. These processes all occur within the time scale of femtoseconds and the spatial scale of angstroms, and it is necessary to use ultra-high spatio-temporal resolution technology to conduct multi-dimensional detection and research on them.

[0003] Ultra-high spatio-temporal resolution technology: femtosecond pump-probe technology - using a femtosecond pulsed laser beam as the pump laser to excite the material, and another pulsed laser beam as the probe light to enter the imaging or receiving device after passing through the area irradiated by the pump laser on the target material; among them, the time when the probe light passes through the target material is later than the time when the pump light reaches the target material, and the detection of ultrafast phenomena can be achieved.

[0004] In the entire detection of the initial process of marine corrosion, an essential part is the sample mechanism, that is, the mechanism used to hold the sample and maintain a vacuum environment. However, the existing sample mechanisms only place the sample plate and cannot simulate the marine environment to make the sample plate contact the seawater environment, so the detection results will still be affected. Summary of the Invention

[0005] The purpose of the present invention is to provide a sample mechanism for detecting the initial process of marine corrosion. Through the cooperation of the communication port and the three-way joint, the vacuum pumping operation can be completed through the communication port, and at the same time, the water dripping operation can also be completed, so that the sample plate can simulate the sample environment of seawater immersion, and thus a more accurate detection effect can be obtained.

[0006] To achieve the above purpose, the technical solution adopted by the present invention is: a sample mechanism for detecting the initial process of marine corrosion, including a sample box, a sample loading device for placing a sample plate is arranged in the sample box, an excitation interface and a detection interface are arranged on one side of the sample box, and it is characterized in that a communication port is opened on the upper part of the sample box, a three-way joint is connected to the upper part of the communication port, the other two interfaces of the three-way joint are respectively used for air extraction and water dripping, the interface for air extraction is connected to a vacuum pump, the interface for water dripping is equipped with a plugging cover, a water dripping joint matching with the communication port is arranged on the inner upper plate of the sample box, and a water dripping pipe connecting with the sample plate on the sample loading device is connected to the water dripping joint.

[0007] Preferably, the water dripping pipe includes a water dripping hose connected to the water dripping joint, the lower end of the water dripping hose is connected with a water dripping head, and the water dripping head is a metal heavy pipe, and a pull rope is connected to the water dripping head, and the upper end of the pull rope is connected to the retracting and releasing structure in the sample box.

[0008] Preferably, the retracting and extending structure includes a retracting and extending motor installed on the upper part of the sample box. The retracting and extending motor is connected to a retracting and extending cylinder, and one end of the pulling rope is fixed on the retracting and extending cylinder.

[0009] Preferably, the retracting and extending motor is installed on a retracting and extending mounting frame. The retracting and extending mounting frame is installed on the inner wall of the sample box by bolts. The rotating shaft of the retracting and extending motor is connected to the retracting and extending cylinder through a retracting and extending clamping bolt.

[0010] Preferably, the sample loading device includes a sample mounting seat arranged in the sample box. A sample loading adjusting structure is arranged on the sample mounting seat. The sample plate is installed on the sample loading adjusting structure, and different parts of the sample plate are coordinated with the detection laser and the excitation laser through the sample loading adjusting structure. A waterproof cover is installed on the sample mounting seat, and the waterproof cover is located below the sample plate and surrounds the sample loading adjusting structure.

[0011] Preferably, the sample loading adjusting structure includes a lateral adjusting structure arranged on the sample loading mounting seat and a sample loading adjusting seat installed on the lateral adjusting structure. A sample loading rotating motor is arranged on the sample loading adjusting seat. The sample loading rotating motor is connected to a sample loading rotating seat, and the sample plate is fixed on the sample loading rotating seat.

[0012] Preferably, the lateral adjusting structure includes a sample loading adjusting motor arranged on the sample loading mounting seat. The sample loading adjusting motor drives a sample loading adjusting lead screw. The sample loading adjusting lead screw is sleeved and matched with a sample loading adjusting movable block. The sample loading adjusting movable block is matched with a sample loading adjusting slide rail arranged on the sample loading mounting seat. The sample loading adjusting seat is arranged on the sample loading adjusting movable block.

[0013] Preferably, a sample support is installed below the sample plate by bolts. The sample support is in an inverted conical shape, and the lower part of the sample support is a flat plate and is located on the sample loading rotating seat. A sample loading screw is arranged at the center of the sample loading rotating seat, and the sample loading screw passes through the lower flat plate of the sample support and locks the sample support on the sample loading rotating seat through a sample loading locking nut.

[0014] Preferably, an annular sample loading limiting groove is formed at the lower part of the sample loading rotating seat. A sample loading limiting rod is arranged on the sample loading adjusting seat, and the upper part of the sample loading limiting rod is inserted into the sample loading limiting groove. The inserted part into the sample loading limiting groove is arc-shaped and is tangentially matched with the sample loading limiting groove.

[0015] The technical effect of the present invention is: Through the communication port cooperating with the three-way joint, the vacuum pumping operation can be completed through the communication port, and at the same time, the water dripping operation can also be completed, so that the sample plate simulates the sample environment of seawater immersion, and thus a more accurate detection effect can be obtained.

[0016] The design of the structure of the drip water pipe in combination with the retracting and extending structure can reduce the distance between the drip outlet and the sample plate, enabling all the simulated seawater to drip onto the sample plate. After the dripping is completed, the dripping end of the drip water pipe can be retracted without interfering with the laser detection.

[0017] The design of the retracting and extending structure is convenient for the overall installation and disassembly, and also facilitates the disassembly and installation of the retracting and extending cylinder.

[0018] The sample loading device adopts horizontal adjustment in combination with rotational adjustment, which can enable multiple positions of the sample plate to cooperate with the detection laser and the excitation laser to achieve detection at multiple points, and ensure that each point can be detected. The required horizontal adjustment range is only the length of the radius of the sample plate (circular) or half of the diagonal (square), so that the waterproof cover can be better set. Through the size design of the sample plate, it is ensured that no matter how it is adjusted, the waterproof cover is always below the sample plate, preventing the simulated seawater from entering the sample loading adjustment structure and avoiding corrosion. Moreover, the rotational structure not only plays an adjustment role, but also can cooperate with the dripping structure to make the dripping liquid perform a centrifugal motion, so as to better make the liquid contact with all positions of the sample plate. At the same time, the centrifugal liquid has an outward acceleration when flowing out of the sample plate, which can better prevent the liquid from entering the waterproof cover. The design of the sample bracket can facilitate the connection between the sample plate and the sample loading adjustment structure.

[0019] Through the design of the sample loading limit rod for the sample loading rotating seat, it can ensure the smooth rotation and accurate trajectory of the sample loading rotating seat. Coupled with the horizontal adjustment structure of the motor screw rod, it can ensure the accuracy of the horizontal adjustment. Description of the Drawings

[0020] Figure 1 It is a schematic structural diagram of a sample mechanism for detecting the initial process of marine corrosion.

[0021] Figure 2 It is a schematic structural diagram of the dripping device.

[0022] Figure 3 It is a schematic diagram of the retracting and extending structure.

[0023] Figure 4 It is Figure 3 The sectional view taken along B-B in

[0024] Figure 5 It is a schematic structural diagram of the sample loading device.

[0025] Figure 6 It is a schematic diagram of the sample loading adjustment structure.

[0026] The text labels shown in the figure are as follows: 1. Sample box; 2. Sample loading device; 3. Sample plate; 4. Excitation interface; 5. Detection interface; 6. Detection port; 7. Water dripping device; 11. Three-way joint; 12. Vacuum pump; 13. Sealing cover; 14. Water dripping joint; 15. Water dripping hose; 16. Water dripping head; 17. Pulling rope; 18. Retracting and releasing structure; 19. Retracting and releasing mounting frame; 20. Retracting and releasing motor; 21. Retracting and releasing cylinder; 22. Retracting and releasing clamping bolt; 31. Sample support; 32. Sample loading mounting seat; 33. Waterproof cover; 34. Sample loading adjustment motor; 35. Sample loading adjustment screw rod; 36. Sample loading adjustment slide rail; 37. Sample loading adjustment movable block; 38. Sample loading adjustment seat; 39. Sample loading rotation motor; 40. Sample loading rotation seat; 41. Sample loading limit rod; 42. Sample loading screw; 43. Sample loading locking nut. Detailed implementation mode

[0027] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be described in detail below with reference to the accompanying drawings. The description of this part is only exemplary and explanatory, and should not have any restrictive effect on the protection scope of the present invention. Embodiment 1

[0028] As Figure 1-2 shown, a sample mechanism for detecting the initial process of marine corrosion includes a sample box 1. Inside the sample box 1, there is a sample loading device 2 and a water dripping device 7 for placing a sample plate 3. On one side of the sample box 1, there are an excitation interface 4 and a detection interface 5. The water dripping device 7 includes a communication port opened on the upper part of the sample box 1. The upper part of the communication port is connected with a three-way joint 11. The other two interfaces of the three-way joint 11 are respectively used for air extraction and water dripping. The air extraction interface is connected with a vacuum pump 12, and the water dripping interface is matched with a sealing cover 13. A water dripping joint 14 matched with the communication port is arranged on the inner upper plate of the sample box 1. The water dripping joint 14 is connected with a water dripping hose 15. The lower end of the water dripping hose 15 is connected with a water dripping head 16. And the water dripping head 16 is a metal heavy pipe, and the water dripping head 16 is connected with a pulling rope 17. The upper end of the pulling rope 17 is connected with a retracting and releasing structure 18 inside the sample box 1.

[0029] First, connect the mechanism of the present application to the laser detection device. Specifically, the excitation interface 4 and the detection interface 5 are respectively connected to the laser transmission tube and the detection laser transmission tube. The detection port 6 of the sample box 1 is connected to the spherical grating and the CCD detector. Then, open the sample box 1, and then place the sample plate 3 on the sample loading device 2. After that, close the sample box 1. Then, open the plugging cover 13 and drip seawater (or a water solution with seawater corrosion properties) from the water dripping interface of the three-way joint 11. Since the water dripping head 16 is a metal heavy tube, when there is no acting force on the pull rope 17, the water dripping hose 15 is in a vertical state, and seawater will fall onto the sample plate 3 from top to bottom, making the sample plate 3 in a state of seawater corrosion. Then, wind up the pull rope 17 through the winding and unwinding structure 18 to raise the water dripping head 16. In this way, the water dripping hose 15 is in an arc state. Then, close the plugging cover 13 again. Then, start the vacuum pump 12 to pump air into the sample box 1 from the three-way joint 11 to create a vacuum environment in the sample space. After that, the excitation laser and the detection laser can be started. First, use a femtosecond pulsed laser beam as the pump laser to excite the material. The excitation laser will irradiate the surface film layer of the sample plate. Another pulsed laser beam is used as the detection light. After passing through the area where the pump laser irradiates the target material, it enters the spherical grating and the CCD detector. Pulling the water dripping hose into an arc can avoid interfering with the laser detection. Embodiment 2

[0030] As Figure 3-4 shown, compared with Embodiment 1, in this embodiment, the winding and unwinding structure is specifically defined. The winding and unwinding structure 18 includes a winding and unwinding motor 20 installed on the upper part of the sample box 1. The winding and unwinding motor 20 is connected with a winding and unwinding cylinder 21. One end of the pull rope 17 is fixed on the winding and unwinding cylinder 21. The winding and unwinding motor 20 is installed on the winding and unwinding mounting frame 19. The winding and unwinding mounting frame 19 is installed on the inner wall of the sample box 1 by bolts. The rotating shaft of the winding and unwinding motor 20 is connected to the winding and unwinding cylinder 21 through a winding and unwinding clamping bolt 22.

[0031] In this embodiment, the winding and unwinding structure is integrally installed on the side upper wall of the sample box 1 through the winding and unwinding mounting frame 19. Then, the pull rope 17 is fixed to the winding and unwinding cylinder 21. Then, drive the winding and unwinding cylinder 21 to rotate through the winding and unwinding motor 20. In this way, the winding and unwinding of the pull rope 17 can be realized. Similarly, for the winding and unwinding structure of the present application, the winding and unwinding cylinder 21 and the output shaft of the winding and unwinding motor 20 can be disassembled by removing the winding and unwinding clamping bolt 22. Embodiment 3

[0032] As Figure 5-6As shown, this embodiment specifically describes the structure of the sample loading device 2. The sample loading device 2 includes a sample mounting base 32 disposed in the sample box 1. A sample loading adjustment structure is provided on the sample mounting base 32. The sample plate 3 is mounted on the sample loading adjustment structure, and different parts on the sample plate 3 are coordinated with the detection laser and the excitation laser through the sample loading adjustment structure. A waterproof cover 33 is mounted on the sample mounting base 32, and the waterproof cover 33 is located below the sample plate 3 and surrounds the sample loading adjustment structure. The sample loading adjustment structure includes a sample loading adjustment motor 34. The sample loading adjustment motor 34 drives a sample loading adjustment screw rod 35. The sample loading adjustment screw rod 35 is sleeved and fitted with a sample loading adjustment movable block 37. The sample loading adjustment movable block 37 is coordinated with a sample loading adjustment slide rail 36 provided on the sample mounting base 32. A sample loading adjustment seat 38 is provided on the sample loading adjustment movable block 37. A sample loading rotation motor 39 is provided on the sample loading adjustment seat 38. The sample loading rotation motor 39 is connected to a sample loading rotation seat 40. The sample plate 3 is fixed on the sample loading rotation seat 40. A sample support 31 is mounted below the sample plate 3 by bolts. The sample support 31 is in an inverted conical shape, and the lower part of the sample support 31 is a flat plate and is located on the sample loading rotation seat 40. A sample loading screw rod 42 is provided at the center of the sample loading rotation seat 40. The sample loading screw rod 42 passes through the lower flat plate of the sample support 31, and the sample support 31 is locked on the sample loading rotation seat 40 by a sample loading lock nut 43. An annular sample loading limit groove is formed at the lower part of the sample loading rotation seat. A sample loading limit rod 41 is provided on the sample loading adjustment seat 38. The upper part of the sample loading limit rod 41 is inserted into the sample loading limit groove, and the inserted part into the sample loading limit groove is arc-shaped and is tangentially coordinated with the sample loading limit groove.

[0033] In this embodiment, compared with Embodiment 1, the difference lies in the specific use of the sample loading device. When the sample plate 3 is placed into the sample loading device, first, the sample bracket 31 is installed on the lower part of the sample plate through bolts. Then, the sample bracket 31 is penetrated by the loading screw 42, and the sample bracket 31 is supported by the sample loading rotating base 40. After that, the sample bracket 31 is locked on the sample loading rotating base 40 through the sample loading locking nut 43. After the installation of the sample plate 3 is completed, a dripping operation will be carried out. When dripping, the sample loading rotating motor 39 drives the sample loading rotating base 40 to rotate, so as to drive the sample plate 3 to rotate. The liquid dripping on the sample plate 3 will perform a centrifugal motion, so that all parts of the sample plate 3 can come into contact with the liquid. At the same time, the escaped liquid is thrown out under the centrifugal force, so it is more unlikely to enter the waterproof cover; after the laser detection of one point is completed, it is necessary to change to another point for laser detection. Therefore, it is necessary to adjust the position of the sample plate 3. Specifically, the sample loading adjustment motor 34 drives the sample loading adjustment screw rod 35 to move, so as to drive the sample loading rotating motor 39 to move horizontally. Combined with the rotation of the sample loading rotating motor 39 driving the sample loading rotating base 40, all positions on the sample plate can be adjusted to the position matching the laser for laser detection. Generally, more than 3 and less than 30 points are detected on one sample plate; in specific use, both the sample loading adjustment motor 34 and the sample loading rotating motor 39 adopt stepping motors.

[0034] When the sample loading rotating base 40 rotates, the sample loading limiting groove opened under it is limited by the sample loading limiting rod 41 to ensure that its rotation trajectory is accurate and the rotation is stable without tilting.

[0035] It should be noted that in this article, the term "including", "comprising" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or further includes elements inherent to this process, method, article or device.

[0036] In this article, specific examples are used to elaborate on the principle and implementation mode of the present invention. The description of the above examples is only used to help understand the method and its core idea of the present invention. The above is only the preferred implementation mode of the present invention. It should be pointed out that due to the limited nature of written expression and objectively existing infinite specific structures, for those of ordinary skill in the art in this technical field, without departing from the principle of the present invention, several improvements, retouches or changes can be made, or the above technical features can be combined in an appropriate manner; these improvements, retouches, changes or combinations, or directly applying the concept and technical solution of the invention to other occasions without improvement, should all be regarded as the protection scope of the present invention.

Claims

1. A sample mechanism for detecting the initial process of marine corrosion, comprising a sample box, a sample loading device for placing a sample plate is arranged in the sample box, an excitation interface and a detection interface are arranged on one side of the sample box, and it is characterized in that, The upper part of the sample box is provided with a communication port. The upper part of the communication port is connected with a three-way joint. The other two interfaces of the three-way joint are respectively used for air extraction and water dripping. The air extraction interface is connected with a vacuum pump for air extraction, and the water dripping interface is fitted with a plugging cover. On the inner upper plate of the sample box, there is a water dripping joint that cooperates with the communication port. The water dripping joint is connected with a water dripping pipe that cooperates with the sample plate on the sample loading device.

2. The sample mechanism for detecting the initial process of marine corrosion according to claim 1, characterized in that The water dripping pipe includes a water dripping hose connected with the water dripping joint. The lower end of the water dripping hose is connected with a water dripping head, and the water dripping head is a heavy metal pipe. The water dripping head is connected with a pull rope, and the upper end of the pull rope is connected with the retracting and releasing structure inside the sample box.

3. The sample mechanism for detecting the initial process of marine corrosion according to claim 2, characterized in that, The retracting and releasing structure includes a retracting and releasing motor installed on the upper part of the sample box. The retracting and releasing motor is connected with a retracting and releasing cylinder, and one end of the pull rope is fixed on the retracting and releasing cylinder.

4. A sample mechanism for detecting the initial process of marine corrosion according to claim 3, characterized in that, The retracting and releasing motor is installed on a retracting and releasing mounting frame. The retracting and releasing mounting frame is installed on the inner wall of the sample box by bolts. The rotating shaft of the retracting and releasing motor is connected with the retracting and releasing cylinder through a retracting and releasing clamping bolt.

5. The sample mechanism for detecting the primary process of marine corrosion according to claim 3, characterized in that, The sample loading device includes a sample mounting seat arranged inside the sample box. The sample mounting seat is provided with a sample loading adjusting structure. The sample plate is installed on the sample loading adjusting structure, and through the sample loading adjusting structure, different parts on the sample plate are made to cooperate with the detection laser and the excitation laser. A waterproof cover is installed on the sample mounting seat, and the waterproof cover is located below the sample plate and surrounds the sample loading adjusting structure.

6. The sample mechanism for detecting the initial process of marine corrosion according to claim 5, characterized in that, The sample loading adjusting structure includes a horizontal adjusting structure arranged on the sample mounting seat and a sample loading adjusting seat installed on the horizontal adjusting structure. The sample loading adjusting seat is provided with a sample loading rotating motor. The sample loading rotating motor is connected with a sample loading rotating seat, and the sample plate is fixed on the sample loading rotating seat.

7. The sample mechanism for detecting the primary process of marine corrosion according to claim 6, characterized in that, The horizontal adjusting structure includes a sample loading adjusting motor arranged on the sample mounting seat. The sample loading adjusting motor drives a sample loading adjusting lead screw. The sample loading adjusting lead screw is sleeved and fitted with a sample loading adjusting movable block. The sample loading adjusting movable block cooperates with a sample loading adjusting slide rail arranged on the sample mounting seat. The sample loading adjusting seat is arranged on the sample loading adjusting movable block.

8. The sample mechanism for detecting the initial process of marine corrosion according to claim 7, characterized in that, A sample support is installed below the sample plate by bolts. The sample support is in an inverted conical shape, and the lower part of the sample support is a flat plate and is located on the sample loading rotating seat. A sample loading screw is arranged at the center of the sample loading rotating seat, and the sample loading screw passes through the lower flat plate of the sample support and locks the sample support on the sample loading rotating seat through a sample loading locking nut.

9. The sample mechanism for detecting the primary process of marine corrosion according to claim 8, characterized in that, An annular sample loading limiting groove is opened at the lower part of the sample loading rotating seat. A sample loading limiting rod is arranged on the sample loading adjusting seat, and the upper part of the sample loading limiting rod is inserted into the sample loading limiting groove. The part inserted into the sample loading limiting groove is arc-shaped and is in tangential cooperation with the sample loading limiting groove.

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