Clamp for mechanical instrument detection

Abstract

A mechanical instrument detection clamp disclosed by the present invention comprises a bottom plate, a stable clamping mechanism, a rapid clamping mechanism and a clamping auxiliary mechanism, the stable clamping mechanism comprises a lateral frame, an electric push rod, a moving frame and a flexible pad, and the rapid clamping mechanism comprises a clamping pipe, a clamping rod, a clamping groove, an elastic sheet, a reset spring, a top sleeve and a pull plate. The clamping auxiliary mechanism comprises a connecting plate, an inner gear, a rotating gear, a lead screw, a threaded plate, a movable sleeve, a movable rod and a stable clamping mechanism, the two sets of lateral frames are symmetrically installed on the bottom plate, a stable supporting structure is provided, the stability of the mechanical instrument in the testing process is ensured, and the clamping rod and the clamping pipe are rapidly connected. The mechanical instrument is installed and detached more quickly, the testing efficiency is improved, and accurate adjustment of the position of a clamping rod can be achieved through cooperation of an inner gear, a rotating gear, a lead screw and a threaded plate.

Description

Technical Field

[0001] This invention relates to the field of fixture technology, and more specifically, to fixtures for testing mechanical instruments. Background Technology

[0002] Easy-to-adjust mechanical instrument testing fixtures are tools specifically designed for the testing and measurement of mechanical instruments, providing a fast, accurate, and repeatable testing environment. These fixtures are commonly used in research and development, production, and maintenance processes to evaluate the performance parameters of mechanical instruments.

[0003] In existing technologies, firstly, some devices may cause instability of mechanical instruments during testing, affecting the accuracy of test results. They also make it difficult to easily adjust the position and angle of mechanical instruments, limiting the flexibility of testing. They may not be able to adapt to mechanical instruments of different shapes and sizes, resulting in insufficient clamping force and affecting the reliability of testing. Secondly, the installation and disassembly process of mechanical instruments in some devices is cumbersome, reducing testing efficiency. It may also cause instability of the clamping rod during testing, affecting the accuracy of test results. Finally, the connection operation of some devices is complicated, increasing the labor intensity of operators. Summary of the Invention

[0004] In view of the problems existing in the prior art, the present invention provides a fixture for testing mechanical instruments to solve the technical problems mentioned in the background art, such as the instability of mechanical instruments during the testing process and the cumbersome installation and disassembly process of mechanical instruments. Technical solution

[0005] To achieve the above objectives, the present invention provides the following technical solution: a fixture for testing mechanical instruments, comprising a base plate, a stable clamping mechanism, a quick-connect mechanism, and a connecting auxiliary mechanism. The stable clamping mechanism includes a lateral frame, an electric push rod, a movable frame, and a flexible pad. Two sets of lateral frames are symmetrically installed on the top end face of the base plate. The electric push rod is installed on the lateral frame, and the flexible pad is installed on the side wall of the movable frame. The two sets of electric push rods are arranged in relative motion. The quick-connect mechanism includes a clamping tube, a clamping rod, a clamping groove, an elastic sheet, a return spring, a top sleeve, and a pull plate. One end of the clamping rod extends into the interior of the clamping tube. The clamping groove is located on the side wall of the clamping rod. Multiple sets of elastic sheets are installed on the inner wall of the clamping tube. The top sleeve is movably fitted onto the outer wall of the clamping tube. The pull plate is horizontally installed at the bottom of the top plate. The return spring is installed between the top of the pull plate and the inner wall of the clamping tube. The return spring moves the pull plate and the top sleeve away from the elastic sheet, and the top sleeve can contact the bottom of the elastic sheet, pushing the elastic sheet out of the clamping groove.

[0006] The present invention is further configured such that the snap-fit ​​auxiliary mechanism includes a connecting plate, an internal gear, a rotating gear, a lead screw, a threaded plate, a movable sleeve, and a movable rod. The connecting plate is fixedly installed at the bottom end of the side wall of the snap-fit ​​tube. The internal gear is directionally rotatably disposed on the top end face of the connecting plate. The rotating gear is installed at one end of the lead screw. The movable sleeve is movably disposed at the top end of the side wall of the snap-fit ​​tube. The movable rod is longitudinally movably disposed on the side wall of the snap-fit ​​tube. Both ends of the movable rod are respectively connected to the movable sleeve and the pull plate. The threaded plate is disposed on the outer wall of the movable sleeve. One end of the lead screw extends through the threaded plate, and the outer wall of the lead screw is threadedly connected to the threaded plate.

[0007] The invention is further configured such that a stabilizing spring is installed at the top of the internal end of the snap-fit ​​tube, and one end of the snap-fit ​​rod extends into the snap-fit ​​tube to compress the stabilizing spring. The stabilizing spring inside the snap-fit ​​tube provides additional support, ensuring the stability of the snap-fit ​​rod during the test.

[0008] The invention is further configured such that a slide rail is symmetrically mounted on the top end face of the base plate, and a slider is mounted on the bottom of the movable frame. The design of the slide rail and the slider allows the movable frame to move smoothly.

[0009] The invention is further configured such that the bottom of the slider is movably mounted on the slide rail for directional movement, and the two sets of moving frames are arranged in relative motion, which facilitates the adjustment of the position of the mechanical instruments.

[0010] The invention is further configured such that a mounting plate is connected to the center of the top end face of the base plate, and the placement box is connected to the mounting plate. The flexible pad is in contact with the side of the placement box. The mounting plate provides installation space for the placement box.

[0011] The invention is further configured such that side plates are installed on both sides of the mounting plate, and a connecting plate is fixedly installed on the top end face of the side plates. The side plates facilitate the installation of the mounting plate and the base plate.

[0012] The invention is further configured such that one end of the snap-fit ​​rod is connected to the top end face of the base plate, and the other end of the snap-fit ​​rod extends through the side plate and further into the interior of the snap-fit ​​tube. The quick connection design of the snap-fit ​​rod and the snap-fit ​​tube makes the installation and disassembly of the placement components faster and improves the testing efficiency.

[0013] The present invention is further configured such that the outer surface of the base plate is provided with an anti-corrosion coating, the anti-corrosion coating comprising the following effective components in parts by weight: 5-20 parts of acrylic resin, 5-20 parts of alkyd resin, 2-8 parts of cerium nitrate, 2-4 parts of preservative, 2-4 parts of propylene glycol, 3-6 parts of aluminum hydroxide, and 2-6 parts of curing agent.

[0014] The present invention is further configured such that the outer surface of the base plate is provided with an anti-corrosion coating, the anti-corrosion coating comprising the following effective components in parts by weight: 10 parts acrylic resin, 15 parts alkyd resin, 5 parts cerium nitrate, 3 parts preservative, 3 parts propylene glycol, 5 parts aluminum hydroxide, and 4 parts curing agent. Beneficial effects

[0015] Compared with the prior art, the present invention provides a fixture for testing mechanical instruments, which has the following advantages: This invention features a stable clamping mechanism with two sets of lateral frames symmetrically mounted on the base plate, providing a stable support structure and ensuring the stability of the mechanical instruments during testing. The installation of electric actuators allows for precise control of the position of the moving frame, facilitating the adjustment of the position and angle of the mechanical instruments. The use of flexible pads can adapt to mechanical instruments of different shapes and sizes, while providing stable clamping force and reducing errors during testing.

[0016] This invention features a quick-connect mechanism. The quick-connect design of the locking rod and the locking tube makes the installation and disassembly of mechanical instruments faster, improving testing efficiency. The design of the elastic plate and return spring ensures the stable fixation of the locking rod within the locking tube, while also facilitating quick release and component replacement.

[0017] This invention features a snap-fit ​​auxiliary mechanism. Through the cooperation of an internal gear, a rotating gear, a lead screw, and a threaded plate, the position of the snap-fit ​​rod can be precisely adjusted to adapt to different testing requirements. The design of the movable sleeve and movable rod makes the adjustment of the snap-fit ​​rod more flexible, allowing operators to adjust the test fixture as needed. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the device in the unused state of the present invention; Figure 2 This is a schematic diagram of the stabilizing clamping mechanism in this invention; Figure 3 This is a schematic diagram of the slide rail and slider in this invention; Figure 4 This is a schematic diagram of the quick-connect mechanism and the connecting auxiliary mechanism in this invention; Figure 5 This is a schematic diagram of the internal structure of the quick-connect mechanism and the connecting auxiliary mechanism in this invention.

[0019] In the diagram: 1. Base plate; 2. Side frame; 3. Electric actuator; 4. Moving frame; 5. Flexible pad; 6. Clip-on tube; 7. Clip-on rod; 8. Clip groove; 9. Elastic sheet; 10. Return spring; 11. Top sleeve; 12. Pull plate; 13. Connecting plate; 14. Internal gear; 15. Rotating gear; 16. Lead screw; 17. Threaded plate; 18. Movable sleeve; 19. Movable rod; 20. Stabilizing spring; 21. Slide rail; 22. Slider; 23. Mounting plate; 24. Side plate. Detailed Implementation

[0020] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0021] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0022] In this invention, unless otherwise stated, the directional terms such as "up" and "down" generally refer to the directions shown in the accompanying drawings, or to the vertical, perpendicular, or gravitational direction; similarly, for ease of understanding and description, "left" and "right" generally refer to the left and right shown in the accompanying drawings; "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not intended to limit this invention.

[0023] Please see Figure 1-5 A fixture for testing mechanical instruments includes a base plate 1, a stabilizing clamping mechanism, a quick-connect clamping mechanism, and a clamping auxiliary mechanism. The stabilizing clamping mechanism includes a lateral frame 2, an electric push rod 3, a moving frame 4, and a flexible pad 5. Two sets of lateral frames 2 are symmetrically mounted on the top end face of the base plate 1. The electric push rod 3 is mounted on the lateral frames 2, and the flexible pad 5 is mounted on the side wall of the moving frame 4. The two sets of electric push rods 3 are arranged in a relative motion configuration. The quick-connect clamping mechanism includes a clamping tube 6, a clamping rod 7, a clamping groove 8, an elastic sheet 9, a return spring 10, a top sleeve 11, and... Pull plate 12, one end of locking rod 7 extends into the inside of locking tube 6, locking groove 8 is set on the side wall of locking rod 7, multiple sets of elastic plates 9 are installed on the inner wall of locking tube 6, top sleeve 11 is movable sleeve 18 is installed on the outer wall of locking tube 6, pull plate 12 is horizontally installed at the bottom of top plate, return spring 10 is installed between the top of pull plate 12 and the inner wall of locking tube 6, return spring 10 moves pull plate 12 and top sleeve 11 away from elastic plates 9, and top sleeve 11 can contact the bottom of elastic plate 9, pushing elastic plate 9 out of locking groove 8.

[0024] In this embodiment, when the stabilizing clamping mechanism needs to be operated, the lateral frame 2 is symmetrically installed on the top end face of the base plate 1, the electric push rod 3 is installed on the lateral frame 2, and the bottom of the movable frame 4 is equipped with a slider 22. The slider 22 is movably set on the slide rail 21, so that the movable frame 4 can move directionally along the slide rail 21. The flexible pad 5 is installed on the side wall of the movable frame 4 for stabilizing and clamping the mechanical instruments. When the electric push rod 3 is working, it pushes or pulls the movable frame 4, thereby adjusting the position of the flexible pad 5 to achieve stable clamping of the mechanical instruments. When the quick-connect mechanism is needed, it enables the rapid installation and removal of the mounting plate 23 and the placement box. One end of the snap-fit ​​rod 7 extends into the interior of the snap-fit ​​tube 6. The snap-fit ​​groove 8 is set on the side wall of the snap-fit ​​rod 7. Multiple sets of elastic plates 9 are installed on the inner wall of the snap-fit ​​tube 6. The top sleeve 11 is fitted with a movable sleeve 18 on the outer wall of the snap-fit ​​tube 6. The pull plate 12 is installed horizontally at the bottom of the top plate. The return spring 10 is installed between the top of the pull plate 12 and the inner wall of the snap-fit ​​tube 6. When the pull plate 12 is subjected to external force, the return spring 10 is compressed, causing the pull plate 12 and the top sleeve 11 to approach the elastic plate 9. When the pull plate 12 is released, the return spring 10 moves the pull plate 12 and the top sleeve 11 away from the elastic plate 9. The top sleeve 11 contacts the bottom of the elastic plate 9, pushing the elastic plate 9 out of the snap-fit ​​groove 8, thereby achieving a quick connection between the snap-fit ​​rod 7 and the snap-fit ​​tube 6.

[0025] The snap-fit ​​auxiliary mechanism includes a connecting plate 13, an internal gear 14, a rotating gear 15, a lead screw 16, a threaded plate 17, a movable sleeve 18, and a movable rod 19. The connecting plate 13 is fixedly installed on the bottom side wall of the snap-fit ​​tube 6. The internal gear 14 is rotatably mounted on the top end face of the connecting plate 13. The rotating gear 15 is mounted on one end of the lead screw 16. The movable sleeve 18 is movably mounted on the top side wall of the snap-fit ​​tube 6. The movable rod 19 is longitudinally movably mounted on the side wall of the snap-fit ​​tube 6. The two ends of the movable rod 19 are respectively connected to the movable sleeve 18 and the pull plate 12. The threaded plate 17 is mounted on the outer wall of the movable sleeve 18. One end of the lead screw 16 extends through the threaded plate 17, and the outer wall of the lead screw 16 is threadedly connected to the threaded plate 17.

[0026] When the clamping auxiliary mechanism is in operation, the connecting plate 13 is fixedly installed at the bottom of the side wall of the clamping tube 6. The internal gear 14 is rotatably set on the top end face of the connecting plate 13. The rotating gear 15 is installed at one end of the lead screw 16. The movable sleeve 18 is installed at the top of the side wall of the clamping tube 6. The movable rod 19 is longitudinally movably set on the side wall of the clamping tube 6. The two ends of the movable rod 19 are respectively connected to the movable sleeve 18 and the pull plate 12. The threaded plate 17 is set on the outer wall of the movable sleeve 18. One end of the lead screw 16 extends through the threaded plate 17, and the outer wall of the lead screw 16 is threadedly connected to the threaded plate 17. When the rotating gear 15 rotates, the lead screw 16 rotates accordingly. Through the cooperation between the threaded plate 17 and the lead screw 16, the movable sleeve 18 moves up and down, thereby driving the movable rod 19 and the pull plate 12 to move, so as to achieve precise adjustment of the clamping rod 7.

[0027] Please see Figure 1-5 As a supplementary embodiment of the clamp for mechanical instrument testing of the quick-clamping mechanism and clamping auxiliary mechanism: a stabilizing spring 20 is installed at the top of the internal end of the clamping tube 6, and one end of the clamping rod 7 extends into the clamping tube 6 to compress the stabilizing spring 20. A slide rail 21 is symmetrically installed on the top end face of the base plate 1. A slider 22 is installed at the bottom of the moving frame 4. The bottom of the slider 22 is movably set on the slide rail 21 to cooperate with directional movement. The two sets of moving frames 4 are set to move relative to each other. A mounting plate 23 is connected to the center of the top end face of the base plate 1, and the placement box is connected to the mounting plate 23. The flexible pad 5 is in contact with the side of the placement box. Side plates 24 are installed on both sides of the mounting plate 23, and the connecting plate 13 is fixedly installed on the top end face of the side plate 24. One end of the clamping rod 7 is connected to the top end face of the base plate 1, and the other end of the clamping rod 7 extends through the side plate 24 and further extends into the interior of the clamping tube 6.

[0028] More specifically, the mechanical instrument is placed in the placement box, which is in contact with the flexible pad 5. The position of the moving frame 4 is adjusted by the electric push rod 3 so that the flexible pad 5 stably clamps the mechanical instrument. The quick-connect mechanism enables the quick connection between the clamping rod 7 and the clamping tube 6 for testing. The clamping auxiliary mechanism enables precise adjustment of the clamping rod 7 to meet different testing requirements. The entire device achieves stable clamping and precise testing of the mechanical instrument through the cooperation of components such as the base plate 1, side plate 24, and connecting plate 13.

[0029] In summary, when the overall equipment is in use or operation: when the stable clamping mechanism is required, the lateral frame 2 is symmetrically installed on the top end face of the base plate 1, the electric push rod 3 is installed on the lateral frame 2, the bottom of the movable frame 4 is equipped with a slider 22, the slider 22 is movably set on the slide rail 21, so that the movable frame 4 can move in a direction along the slide rail 21, and the flexible pad 5 is installed on the side wall of the movable frame 4 for stabilizing and clamping the mechanical instruments. When the electric push rod 3 works, it pushes or pulls the movable frame 4, thereby adjusting the position of the flexible pad 5 to achieve stable clamping of the mechanical instruments.

[0030] When the quick-connect mechanism is needed, it enables the rapid installation and removal of the mounting plate 23 and the placement box. One end of the snap-fit ​​rod 7 extends into the interior of the snap-fit ​​tube 6. The snap-fit ​​groove 8 is set on the side wall of the snap-fit ​​rod 7. Multiple sets of elastic plates 9 are installed on the inner wall of the snap-fit ​​tube 6. The top sleeve 11 is fitted with a movable sleeve 18 on the outer wall of the snap-fit ​​tube 6. The pull plate 12 is installed horizontally at the bottom of the top plate. The return spring 10 is installed between the top of the pull plate 12 and the inner wall of the snap-fit ​​tube 6. When the pull plate 12 is subjected to external force, the return spring 10 is compressed, causing the pull plate 12 and the top sleeve 11 to approach the elastic plate 9. When the pull plate 12 is released, the return spring 10 moves the pull plate 12 and the top sleeve 11 away from the elastic plate 9. The top sleeve 11 contacts the bottom of the elastic plate 9, pushing the elastic plate 9 out of the snap-fit ​​groove 8, thereby achieving a quick connection between the snap-fit ​​rod 7 and the snap-fit ​​tube 6.

[0031] When the clamping auxiliary mechanism is in operation, the connecting plate 13 is fixedly installed at the bottom of the side wall of the clamping tube 6. The internal gear 14 is rotatably set on the top end face of the connecting plate 13. The rotating gear 15 is installed at one end of the lead screw 16. The movable sleeve 18 is installed at the top of the side wall of the clamping tube 6. The movable rod 19 is longitudinally movably set on the side wall of the clamping tube 6. The two ends of the movable rod 19 are respectively connected to the movable sleeve 18 and the pull plate 12. The threaded plate 17 is set on the outer wall of the movable sleeve 18. One end of the lead screw 16 extends through the threaded plate 17, and the outer wall of the lead screw 16 is threadedly connected to the threaded plate 17. When the rotating gear 15 rotates, the lead screw 16 rotates accordingly. Through the cooperation between the threaded plate 17 and the lead screw 16, the movable sleeve 18 moves up and down, thereby driving the movable rod 19 and the pull plate 12 to move, so as to achieve precise adjustment of the clamping rod 7.

[0032] The mechanical instrument is placed in the placement box, which is in contact with the flexible pad 5. The position of the moving frame 4 is adjusted by the electric push rod 3 so that the flexible pad 5 stably clamps the mechanical instrument. The quick-connect mechanism enables the quick connection between the clamping rod 7 and the clamping tube 6 for testing. The clamping auxiliary mechanism enables precise adjustment of the clamping rod 7 to meet different testing requirements. The entire device achieves stable clamping and precise testing of the mechanical instrument through the cooperation of components such as the base plate 1, side plate 24, and connecting plate 13.

[0033] The anti-corrosion coating comprises the following effective components in parts by weight: 5 parts acrylic resin, 5 parts alkyd resin, 2 parts cerium nitrate, 2 parts preservative, 2 parts propylene glycol, 3 parts aluminum hydroxide, and 2 parts curing agent. The above materials are put into relevant equipment for preparation, and after preparation, they are coated onto the outer surface of the base plate 1 by brush.

[0034] Of all the solutions mentioned above, those involving the connection between two components can be selected according to the actual situation, such as welding, bolt and nut connection, bolt or screw connection, or other known connection methods, which will not be elaborated here. For all the fixed connections mentioned above, welding is preferred. Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A fixture for testing mechanical instruments, comprising a base plate (1), a stabilizing clamping mechanism, a quick-clamping mechanism, and a clamping auxiliary mechanism, characterized in that: The stabilizing clamping mechanism includes a lateral frame (2), an electric push rod (3), a movable frame (4), and a flexible pad (5). Two sets of lateral frames (2) are symmetrically installed on the top end face of the base plate (1). The electric push rod (3) is installed on the lateral frame (2), and the flexible pad (5) is installed on the side wall of the movable frame (4). The two sets of electric push rods (3) are arranged in relative motion. The quick-clamping mechanism includes a clamping tube (6), a clamping rod (7), a clamping groove (8), an elastic sheet (9), a return spring (10), a top sleeve (11), and a pull plate (12). One end of the clamping rod (7) extends into the clamping tube (6). Inside 6), the slot (8) is set on the side wall of the snap rod (7), multiple sets of elastic plates (9) are installed on the inner wall of the snap tube (6), the top sleeve (11) is mounted on the outer wall of the snap tube (6), the pull plate (12) is installed horizontally at the bottom of the top plate, and the return spring (10) is installed between the top of the pull plate (12) and the inner wall of the snap tube (6). The return spring (10) moves the pull plate (12) and the top sleeve (11) away from the elastic plate (9), and the top sleeve (11) can contact the bottom of the elastic plate (9) to push the elastic plate (9) out of the slot (8).

2. The fixture for testing mechanical instruments according to claim 1, characterized in that: The locking auxiliary mechanism includes a connecting plate (13), an internal gear (14), a rotating gear (15), a lead screw (16), a threaded plate (17), a movable sleeve (18), and a movable rod (19). The connecting plate (13) is fixedly installed on the bottom side wall of the locking tube (6). The internal gear (14) is directionally rotated and set on the top end face of the connecting plate (13). The rotating gear (15) is installed on one end of the lead screw (16). The movable sleeve (18) is movably fitted on the top end of the side wall of the locking tube (6). The movable rod (19) is longitudinally movably set on the side wall of the locking tube (6). The two ends of the movable rod (19) are respectively connected to the movable sleeve (18) and the pull plate (12). The threaded plate (17) is set on the outer wall of the movable sleeve (18). One end of the lead screw (16) extends through the threaded plate (17), and the outer wall of the lead screw (16) is threadedly connected to the threaded plate (17).

3. The fixture for testing mechanical instruments according to claim 1, characterized in that: A stabilizing spring (20) is installed at the top of the inner end of the clamping tube (6), and one end of the clamping rod (7) extends into the clamping tube (6) to compress the stabilizing spring (20).

4. The fixture for testing mechanical instruments according to claim 1, characterized in that: The top end face of the base plate (1) is symmetrically equipped with a slide rail (21), and the bottom of the movable frame (4) is equipped with a slider (22).

5. The fixture for testing mechanical instruments according to claim 4, characterized in that: The bottom of the slider (22) is movably mounted on the slide rail (21) to facilitate directional movement, and the two sets of moving frames (4) are arranged to move relative to each other.

6. The fixture for testing mechanical instruments according to claim 1, characterized in that: An mounting plate (23) is connected to the center of the top end face of the base plate (1), and the placement box is connected to the mounting plate (23). The flexible pad (5) is in contact with the side of the placement box.

7. The fixture for testing mechanical instruments according to claim 6, characterized in that: Side plates (24) are installed on both sides of the mounting plate (23), and the connecting plate (13) is fixedly installed on the top end face of the side plate (24).

8. The fixture for testing mechanical instruments according to claim 1, characterized in that: One end of the snap-fit ​​rod (7) is connected to the top end face of the base plate (1), and the other end of the snap-fit ​​rod (7) extends through the side plate (24) and further extends into the interior of the snap-fit ​​tube (6).

9. The fixture for testing mechanical instruments according to claim 1, characterized in that: The outer surface of the base plate (1) is provided with an anti-corrosion coating, which includes the following effective components in parts by weight: 5-20 parts of acrylic resin, 5-20 parts of alkyd resin, 2-8 parts of cerium nitrate, 2-4 parts of preservative, 2-4 parts of propylene glycol, 3-6 parts of aluminum hydroxide and 2-6 parts of curing agent.

10. The fixture for testing mechanical instruments according to claim 1, characterized in that: The outer surface of the base plate (1) is provided with an anti-corrosion coating, which includes the following effective components in parts by weight: 10 parts acrylic resin, 15 parts alkyd resin, 5 parts cerium nitrate, 3 parts preservative, 3 parts propylene glycol, 5 parts aluminum hydroxide and 4 parts curing agent.

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