A stress testing device and method for FRP tendon

Abstract

The application discloses a FRP tendon stress testing device, which comprises a rack, a support table and an adjusting box arranged on the two sides of the vertical part of the rack, a carrier mechanism rotatably installed on the vertical part of the rack, and a testing mechanism arranged on the horizontal part of the rack; the support table matched with the carrier mechanism is a square base structure, the top of the support table is provided with a first groove and a second groove, the first groove is used for accommodating a linkage mechanism during stress testing, an adjusting mechanism is arranged in the adjusting box, and the adjusting mechanism comprises a gas pipe penetrating through the bottom of the adjusting box and being rotationally connected with the adjusting box, an exhaust hole arranged on one side of the gas pipe, an air inlet end of the gas pipe connected with the output end of a gas pump, and an input end of the gas pump connected with a heat exchange device; the FRP tendon stress testing device can simulate the stress change of FRP tendon sections under the condition of seawater immersion, so that the testing is more accurate and more real.

Description

Technical Field

[0001] This invention relates to the field of FRP (fiberglass reinforced plastic) reinforcement technology, and more specifically to an FRP reinforcement stress testing device and testing method. Background Technology

[0002] Chinese patent CN210154930U discloses an FRP (fiberglass reinforced plastic) bar compression testing device, comprising a steel cap, an external fixing plug, an FRP bar to be tested, strain gauges, and a loading end. Both ends of the FRP bar to be tested are inserted into the steel cap through the external fixing plug, and the space between the steel cap and the FRP bar is filled with adhesive. The steel caps at both ends of the FRP bar to be tested are respectively installed in grooves on the loading end. The strain gauges are adhered to the FRP bar to be tested using adhesive. In the existing technology, FRP bars have properties such as light weight, high tensile strength and strong corrosion resistance. They are often used in marine environments. However, the current testing equipment for FRP bars cannot effectively simulate the application environment of FRP bars, so as to accurately test the stress changes of FRP bars under environmental influences. Summary of the Invention

[0003] The purpose of this invention is to solve the problems mentioned above in the background art, and to propose an FRP reinforcement stress testing device and testing method.

[0004] The objective of this invention can be achieved through the following technical solutions: An FRP reinforcement stress testing device, comprising: The frame has a T-shaped structure. Support platforms and adjustment boxes are set on both sides of the vertical part of the frame. A carrier mechanism is rotatably mounted on the vertical part of the frame, and a testing mechanism is set on the horizontal part of the frame. The carrier mechanism includes a substrate, a linkage mechanism, and a limiting mechanism; The substrate is rotatably mounted on the vertical part of the frame; a linkage mechanism is provided on the bottom surface of the substrate, and the linkage mechanism is connected to the limiting mechanism. The participating organizations include: The center plate has four movable plates arranged in a circular array. The end of the movable plate away from the center plate is connected to the sliding plate. An elastic telescopic rod is set between the two sliding plates on both horizontal sides. The limiting mechanism includes: A rotating shaft is mounted on a slide plate. A gear is fitted at the bottom of the rotating shaft. A rack that matches the gear is provided on the base plate. The top of the rotating shaft is located above the top surface of the base plate, and a limit plate is vertically connected to the top of the rotating shaft. The support platform adapted to the carrier mechanism is a square base structure. The top of the support platform is provided with a first groove and a second groove. The first groove is used to accommodate the linkage mechanism during stress testing.

[0005] As a further aspect of the present invention: the testing mechanism includes a pressure plate that moves up and down and acts on the FRP rib slice.

[0006] As a further aspect of the present invention, the connection between the elastic telescopic rod and the skateboard is as follows: two elastic telescopic rods are arranged side by side, and the two ends of the elastic telescopic rods are respectively sleeved on the connecting shaft. The connecting shaft is installed on the trapezoidal plate, and the trapezoidal plate is installed on the bottom surface of the skateboard.

[0007] As a further aspect of the present invention: a groove for sliding plate movement is provided on the substrate, and a fixing plate is provided on the top surface of the sliding plate. The fixing plate is located on the top surface of the substrate and is slidably connected to the groove.

[0008] As a further aspect of the present invention: the first groove is a cross-shaped groove structure.

[0009] As a further aspect of the present invention: a second groove is provided on the top of the support platform. Two second grooves are symmetrically arranged and located within the first groove. The second groove is a square groove and is adapted to the trapezoidal plate.

[0010] As a further aspect of the present invention: the regulating box is a box structure with an open top surface, and the top surface dimension of the regulating box is adapted to the dimension of the base.

[0011] As a further aspect of the present invention: an adjustment mechanism is provided inside the adjustment box, the adjustment mechanism comprising: The air pipe runs through the bottom of the regulating box and is rotatably connected to the regulating box. An exhaust port is provided on one side of the air pipe. The air inlet end of the air pipe is connected to the output end of the air pump, and the input end of the air pump is connected to the heat exchange equipment.

[0012] A test method for an FRP (fiberglass reinforced plastic) reinforcement stress testing device includes the following steps: Step 1: Place the FRP rib slice to be tested onto the substrate. The substrate rotates under the action of the rotary motor and is placed on the top surface of the adjustment box. At this time, the trapezoidal plate will disengage from the limit control of the second tank. Under the elastic restoring force of the elastic telescopic rod, the limit mechanism resets, the rotating shaft returns to the initial position, and the limit plate faces the direction close to the center of the substrate. Start the rotating part to drive the air pipe to rotate, so that the temperature-regulated air is discharged from the exhaust hole on the air pipe under the action of the air pump and acts on the FRP rib slice, so that the FRP rib slice moves up and down along the rotating shaft for immersion. Step 2: After soaking, the substrate is rotated by a rotary motor and placed on a support platform. During the process of placing the substrate horizontally on the support platform, the trapezoidal plate will enter the second tank and drive the trapezoidal plates to move away from each other, so that the elastic telescopic rod is in an elastic extension state. The movement of the trapezoidal plate is connected by the central plate and the movable plate, which will drive the four slide plates to move away from the central plate. During the movement of the four slide plates, the gear and rack will mesh and drive the rotating shaft to rotate, so that the limiting plate on the rotating shaft is oriented away from the center of the substrate. At the same time, the FRP rib slice with test is dropped from the top of the fixed plate back between the four fixed plates. Step 3: Control the cylinder to work, and drive the pressure plate to move downward through the lifting plate and guide rod, and apply pressure to the FRP rib slice located on the carrier mechanism to complete the stress test of the FRP rib slice.

[0013] The beneficial effects of this invention are: The carrier mechanism of this invention is compatible not only with the support platform but also with the adjustment box. The L-shaped rod structure formed by the rotating shaft and the fixed plate in this limiting mechanism not only limits the vertical movement of the FRP rib slices during immersion but also limits the FRP rib slices during substrate rotation. Furthermore, during testing, the fixed plate can automatically rotate to ensure that the pressure plate acts on the FRP rib slices to complete the test, thereby greatly improving the convenience of testing FRP rib slices. The regulating chamber of this invention, with its single-row exhaust pipe, can not only intermittently act on the FRP rebar slices to be tested, causing the FRP rebar slices to move up and down along the rotation axis and improving the uniformity of immersion, but also regulate the temperature of the seawater in the regulating chamber by controlling the gas temperature, thereby simulating the effect of seawater on the stress of FRP rebar slices under different temperature conditions. As a result, this regulating chamber will improve the accuracy and diversity of stress testing of FRP rebar slices. In summary, the FRP reinforcement stress testing device of the present invention simulates the stress change of FRP reinforcement slices under seawater immersion conditions by adjusting the box, making the test more accurate and realistic. Attached Figure Description

[0014] The invention will now be further described with reference to the accompanying drawings.

[0015] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the carrier mechanism of the present invention; Figure 3 This is a schematic diagram of the linkage mechanism of the present invention; Figure 4 This is a schematic diagram of the support platform of the present invention; Figure 5 This is the present invention. Figure 1 A magnified view of a portion of point A; Figure 6 This is a schematic diagram of the regulating box of the present invention.

[0016] In the diagram: 1. Frame; 2. Testing mechanism; 3. Support platform; 4. Carrier mechanism; 5. Adjustment box; 6. FRP rib slice; 21. Cylinder; 22. Lifting plate; 23. Guide rod; 24. Pressure plate; 31. First tank; 32. Second tank; 41. Base plate; 42. Linkage mechanism; 421. Elastic telescopic rod; 422. Center plate; 423. Movable plate; 424. Slide plate; 425. Trapezoidal plate; 426. Connecting shaft; 43. Limiting mechanism; 431. Gear; 432. Rack; 433. Rotating shaft; 434. Fixed plate; 435. Limiting plate; 436. Slide groove; 51. Rotating component; 52. Air pipe; 53. Exhaust port; 54. Air pump; 55. Heat exchange equipment. Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Example 1

[0018] Please see Figure 1-6 As shown, the present invention is an FRP reinforcement stress testing device, including a frame 1, a testing mechanism 2, a support platform 3, a carrier mechanism 4, an adjustment box 5, and an FRP reinforcement slice 6; The frame 1 has a T-shaped structure. Support platforms 3 and adjustment boxes 5 are respectively set on both sides of the vertical part of the frame 1. A carrier mechanism 4 is rotatably installed on the vertical part of the frame 1, and a testing mechanism 2 is set on the horizontal part of the frame 1. Among them, the support platform 3 serves to support the carrier mechanism 4 when the testing mechanism 2 applies pressure to it, thus preventing damage and deformation at the connection between the carrier mechanism 4 and the frame 1; the carrier mechanism 4 serves to support the FRP bar slice 6 during stress testing; the regulating box 5 can be filled with seawater at different temperatures to simulate the stress change of the FRP bar after being immersed in seawater for different times at different temperatures, so that the FRP bar stress testing device can change different conditions to achieve different test results, and has strong applicability. The T-shaped frame 1 design enables a separate layout between the support platform 3, the adjustment box 5, and the testing mechanism 2. The carrier mechanism 4 can rotate along the frame 1, allowing the stress test to be completed immediately after the FRP reinforcement slice 6 is immersed in seawater. This effectively improves the testing process. The separate layout also simplifies the testing procedure, prevents interference between tests, and enhances the convenience of testing. Specifically, the testing mechanism 2 includes a cylinder 21, a lifting plate 22, a guide rod 23, and a pressure plate 24. The cylinder 21 is set on the top surface of the frame 1, and the output end of the cylinder 21 is connected to the lifting plate 22. The lifting plate 22 is provided with guide rods 23 around its perimeter. The guide rods 23 slide through the top surface of the frame 1, and the bottom end of the guide rods 23 is connected to the pressure plate 24. During operation, the control cylinder 21 operates, which drives the pressure plate 24 to move downward through the lifting plate 22 and the guide rod 23, and applies pressure to the FRP rib slice 6 located on the carrier mechanism 4 to complete the stress test of the FRP rib slice 6; a displacement sensor is set on one side of the vertical part of the frame 1 to measure the deformation of the FRP rib slice 6 during the stress test. The carrier mechanism 4 includes a substrate 41, a linkage mechanism 42, and a limiting mechanism 43; The substrate 41 is rotatably mounted on the vertical part of the frame 1, and the substrate 41 is connected to the output end of the rotary motor, which is mounted on the frame 1. A pressure sensor is provided at the center of the substrate 41, and a linkage mechanism 42 is provided on the bottom surface of the substrate 41. The linkage mechanism 42 is connected to the limiting mechanism 43. Preferably, the linkage mechanism 42 includes an elastic telescopic rod 421, a center plate 422, a movable plate 423, a sliding plate 424, a trapezoidal plate 425, and a connecting shaft 426. The center plate 422 is rotatably mounted at the center of the bottom surface of the base plate 41. The center plate 422 is arranged in a circular array with four movable plates 423. The end of the movable plate 423 away from the center plate 422 is connected to the sliding plate 424. The elastic telescopic rod 421 is arranged between two sliding plates 424 on both horizontal sides. The connection method between the elastic telescopic rod 421 and the slide plate 424 is as follows: two elastic telescopic rods 421 are arranged side by side, and the two ends of the elastic telescopic rods 421 are respectively sleeved on the connecting shaft 426. The connecting shaft 426 is installed on the trapezoidal plate 425, and the trapezoidal plate 425 is installed on the bottom surface of the slide plate 424. The limiting mechanism 43 includes a gear 431, a rack 432, a rotating shaft 433, a fixed plate 434, a limiting plate 435, and a slide 436. The rotating shaft 433 is rotatably mounted on the four slide plates 424. The gear 431 is sleeved at the bottom end of the rotating shaft 433. The rack 432 that is adapted to the gear 431 is provided on the base plate 41. The top end of the rotating shaft 433 is located above the top surface of the base plate 41, and the limiting plate 435 is vertically connected to the top end of the rotating shaft 433. A slide groove 436 for moving a slide plate 424 is provided on the substrate 41. A fixing plate 434 is provided on the top surface of the slide plate 424. The fixing plate 434 is located on the top surface of the substrate 41 and is slidably connected to the slide groove 436. A support platform 3 adapted to the carrier mechanism 4 is a square base structure. A first groove 31 and a second groove 32 are provided on the top of the support platform 3. The first groove 31 is a cross-shaped groove structure. The first groove 31 is used to accommodate the linkage mechanism 42 during stress testing. Two second grooves 32 are symmetrically arranged and located inside the first groove 31. The second groove 32 is a square groove and is adapted to the trapezoidal plate 425. During operation, when the substrate 41 rotates under the action of the rotary motor and is placed on the support platform 3, during the process of placing the substrate 41 horizontally on the support platform 3, the trapezoidal plate 425 will enter the second groove 32 and drive the trapezoidal plate 425 to move away from each other, so that the elastic telescopic rod 421 is in an elastic extension state. The movement of the trapezoidal plate 425 is connected through the central plate 422 and the movable plate 423, which will drive the four slide plates 424 to move away from the central plate 422. During the movement of the four slide plates 424, the gear 431 will mesh with the rack 432, driving the rotating shaft 433 to rotate, so that the limiting plate 435 on the rotating shaft 433 faces away from the center of the substrate 41. At the same time, the FRP rib slice 6 to be tested falls back from the top of the fixed plate 434 to the four fixed plates 434, and the FRP rib slice 6 to be tested is limited and fixed. The regulating box 5 is a box structure with an open top surface, and the top surface dimension of the regulating box 5 is adapted to the dimension of the base 41. The regulating box 5 is equipped with an regulating mechanism, which includes a rotating part 51, an air pipe 52, an exhaust port 53, an air pump 54, and a heat exchange device 55. The air pipe 52 passes through the bottom of the regulating box 5 and is rotatably connected to the regulating box 5. An exhaust port 53 is provided on one side of the air pipe 52. The air inlet end of the air pipe 52 is connected to the output end of the air pump 54, and the input end of the air pump 54 is connected to the heat exchange device 55. The heat exchange device 55 regulates the temperature of the air. The air tube 52 is connected to the output end of the rotating component 51. The rotating component 51 includes a drive motor. The output end of the drive motor is connected to the drive gear. The drive gear meshes with the driven gear. The driven gear is sleeved on the air tube 52. During operation, the substrate 41 rotates under the action of the rotary motor and is placed on the top surface of the adjustment box 5. At this time, the trapezoidal plate 425 will disengage from the limiting control of the second groove 32. Under the elastic restoring force of the elastic telescopic rod 421, the limiting mechanism 43 resets, the rotating shaft 433 returns to the initial position, and the limiting plate 435 faces the direction close to the center of the substrate 41. The rotating component 51 is started to work, driving the air pipe 52 to rotate, so that the temperature-regulated air is discharged from the exhaust hole 53 on the air pipe 52 under the action of the air pump 54 and acts on the FRP rib slice 6. The regulating chamber 5 of this invention, with its air pipe 52 having a single row of exhaust holes 53, can not only intermittently act on the FRP rib slice 6 to be tested, causing the FRP rib slice 6 to move up and down along the rotation axis 433 and improve the uniformity of immersion of the FRP rib slice 6, but also regulate the temperature of the seawater in the regulating chamber 5 by controlling the gas temperature, thereby simulating the effect of seawater on the stress of the FRP rib slice 6 under different temperature conditions. As a result, the regulating chamber 5 will improve the accuracy and diversity of stress testing of the FRP rib slice 6. In summary, the FRP rib stress testing device of the present invention simulates the stress change of the FRP rib slice 6 under seawater immersion conditions through the adjustment box 5, making the test more accurate and realistic. Furthermore, the carrier mechanism 4 is adapted not only to the support platform 3 but also to the adjustment box 5. The L-shaped rod structure formed by the rotating shaft 433 and the fixed plate 434 in the limiting mechanism 43 not only limits the up-and-down movement of the FRP rib slice 6 during immersion but also limits the FRP rib slice 6 during the rotation of the substrate 41. During the test, the fixed plate 434 can automatically rotate to ensure that the pressure plate 24 acts on the FRP rib slice 6 to complete the test, thereby greatly improving the convenience of testing the FRP rib slice 6. Example 2

[0019] Based on the above embodiment 1, the present invention provides a testing method for an FRP reinforcement stress testing device, comprising the following steps: Step 1: Place the FRP rib slice 6 to be tested onto the substrate 41. The substrate 41 rotates under the action of the rotary motor and is placed on the top surface of the adjustment box 5. At this time, the trapezoidal plate 425 will disengage from the limiting control of the second tank 32. Under the elastic restoring force of the elastic telescopic rod 421, the limiting mechanism 43 resets, the rotating shaft 433 returns to the initial position, and the limiting plate 435 faces the direction close to the center of the substrate 41. Start the rotating component 51 to drive the air pipe 52 to rotate, so that the temperature-adjusted air is discharged from the exhaust hole 53 on the air pipe 52 under the action of the air pump 54 and acts on the FRP rib slice 6, so that the FRP rib slice 6 moves up and down along the rotating shaft 433 for soaking. Step 2: After soaking, the substrate 41 is rotated by the rotary motor and placed on the support platform 3. During the process of placing the substrate 41 horizontally on the support platform 3, the trapezoidal plate 425 will enter the second tank 32 and drive the trapezoidal plate 425 to move away from each other, so that the elastic telescopic rod 421 is in an elastic extension state. The movement of the trapezoidal plate 425 is connected through the central plate 422 and the movable plate 423, which will drive the four slide plates 424 to move away from the central plate 422. During the movement of the four slide plates 424, the gear 431 will mesh with the rack 432, which will drive the rotating shaft 433 to rotate, so that the limiting plate 435 on the rotating shaft 433 will face away from the center of the substrate 41. At the same time, the FRP rib slice 6 with test is dropped from the top of the fixed plate 434 to between the four fixed plates 434. Step 3: Control cylinder 21 to work, and drive pressure plate 24 to move downward through lifting plate 22 and guide rod 23, and act on FRP rib slice 6 located on carrier mechanism 4 to complete the pressure work for stress testing of FRP rib slice 6, and complete the FRP rib stress test.

[0020] The working principle of this invention is as follows: the support platform 3, when the testing mechanism 2 applies pressure to the carrier mechanism 4, supports the carrier mechanism 4 and prevents damage or deformation at the connection between the carrier mechanism 4 and the frame 1; the carrier mechanism 4 supports the FRP bar slice 6 during stress testing; the regulating box 5 can be filled with seawater at different temperatures to simulate the stress change of the FRP bar after being immersed in seawater for different times at different temperatures, so that the FRP bar stress testing device can change different conditions to achieve different test results and has strong applicability.

[0021] The foregoing has provided a detailed description of one embodiment of the present invention, but this description is merely a preferred embodiment and should not be construed as limiting the scope of the invention. All equivalent variations and modifications made within the scope of the claims of this invention should still fall within the patent coverage of this invention.

Claims

1. A stress testing device for FRP (fiberglass reinforced plastic) reinforcement bars, characterized in that, include: The frame (1) is a T-shaped structure. Support platform (3) and adjustment box (5) are respectively provided on both sides of the vertical part of the frame (1). Carrier mechanism (4) is rotatably installed on the vertical part of the frame (1). Carrier mechanism (4) rotates along the frame (1). Test mechanism (2) is provided on the horizontal part of the frame (1). The regulating box (5) is a box structure with an open top surface, and the top surface size of the regulating box (5) is adapted to the size of the base plate (41); The regulating box (5) is equipped with an regulating mechanism, which includes: Air pipe (52) passes through the bottom of regulating box (5) and is rotatably connected to regulating box (5). An exhaust hole (53) is provided on one side of the air pipe (52). The air inlet end of the air pipe (52) is connected to the output end of the air pump (54). The input end of the air pump (54) is connected to the heat exchange equipment (55). The carrier mechanism (4) includes a base plate (41), a linkage mechanism (42), and a limiting mechanism (43); the base plate (41) is rotatably mounted on the vertical part of the frame (1), and the base plate (41) is connected to the output end of the rotary motor, which is mounted on the frame (1); the bottom surface of the base plate (41) is provided with a linkage mechanism (42), which is connected to the limiting mechanism (43); The linkage mechanism (42) includes: A central plate (422) is arranged in a circular array with four movable plates (423). The end of the movable plate (423) away from the central plate (422) is connected to the sliding plate (424). An elastic telescopic rod (421) is provided between the two sliding plates (424) on both horizontal sides. The connection method between the elastic telescopic rod (421) and the slide (424) is as follows: two elastic telescopic rods (421) are arranged side by side, and the two ends of the elastic telescopic rods (421) are respectively sleeved on the connecting shaft (426). The connecting shaft (426) is installed on the trapezoidal plate (425), and the trapezoidal plate (425) is installed on the bottom surface of the slide (424). The limiting mechanism (43) includes: A rotating shaft (433) is mounted on a slide plate (424). A gear (431) is fitted at the bottom end of the rotating shaft (433). A rack (432) that matches the gear (431) is provided on the base plate (41). The top end of the rotating shaft (433) is located above the top surface of the base plate (41), and a limiting plate (435) is vertically connected to the top end of the rotating shaft (433). The support platform (3) adapted to the carrier mechanism (4) is a square base structure. The top of the support platform (3) is provided with a first groove (31) and a second groove (32). The first groove (31) is used to accommodate the linkage mechanism (42) during stress testing. A slide groove (436) for moving a slide plate (424) is provided on the substrate (41). A fixing plate (434) is provided on the top surface of the slide plate (424). The fixing plate (434) is located on the top surface of the substrate (41) and is slidably connected to the slide groove (436). There are two symmetrically arranged second grooves (32) and they are located inside the first groove (31). The second groove (32) is a square groove and is adapted to the trapezoidal plate (425).

2. The FRP reinforcement stress testing device according to claim 1, characterized in that, The testing mechanism (2) includes a pressure plate (24) that moves up and down and acts on the FRP bar slice (6).

3. The FRP reinforcement stress testing device according to claim 1, characterized in that, The first groove (31) has a cross-shaped groove structure.

4. A testing method for an FRP tendon stress testing device as described in any one of claims 1-3, wherein the testing mechanism further comprises a cylinder (21), a lifting plate (22), a guide rod (23), and a pressure plate (24), wherein the cylinder (21) is disposed on the top surface of the frame (1), and the output end of the cylinder (21) is connected to the lifting plate (22), and the lifting plate (22) is provided with guide rods (23) around its perimeter, the guide rods (23) slidingly penetrating the top surface of the frame (1), and the bottom end of the guide rods (23) being connected to the pressure plate (24), characterized in that, Includes the following steps: Step 1: Place the FRP rib slice (6) to be tested onto the substrate (41). The substrate (41) rotates under the action of the rotary motor and is placed on the top surface of the adjustment box (5). At this time, the trapezoidal plate (425) will be released from the limit control of the second tank (32). Under the action of the elastic restoring force of the elastic telescopic rod (421), the limit mechanism (43) is reset, the rotating shaft (433) returns to the initial position, and the limit plate (435) faces the direction close to the center of the substrate (41). Start the rotating part (51) to work, drive the air pipe (52) to rotate, so that the temperature-adjusted air is discharged from the exhaust hole (53) on the air pipe (52) under the action of the air pump (54) and acts on the FRP rib slice (6), so that the FRP rib slice (6) moves up and down along the rotating shaft (433) for soaking. Step 2: After soaking, the substrate (41) is rotated by the rotary motor and placed on the support platform (3). During the process of placing the substrate (41) horizontally on the support platform (3), the trapezoidal plate (425) will enter the second tank (32) and drive the trapezoidal plates (425) to move away from each other, so that the elastic telescopic rod (421) is in an elastic extension state. The movement of the trapezoidal plate (425) is connected by the central plate (422) and the movable plate (423), which will drive All four slide plates (424) move away from the center plate (422); during the movement of the four slide plates (424), the gear (431) will mesh with the rack (432), causing the rotating shaft (433) to rotate, so that the limiting plate (435) on the rotating shaft (433) moves away from the center of the substrate (41); at the same time, the FRP rib slice (6) to be tested falls back from the top of the fixed plate (434) between the four fixed plates (434); Step 3: Control the cylinder (21) to work, drive the pressure plate (24) to move downward through the lifting plate (22) and guide rod (23), and act on the FRP rib slice (6) located on the carrier mechanism (4) to complete the stress test of the FRP rib slice (6) and complete the FRP rib stress test.

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