A basalt fiber composite reinforcement tensile strength testing device and method

Abstract

The present invention relates to the technical field of composite rib strength testing, and specifically proposes a basalt fiber composite rib tensile strength testing device and method, including: two fixing seats, two insertion boxes, a clamping mechanism and a pressing and moving testing mechanism. The present invention realizes integrated clamping and fixing of the two ends of the composite rib by cooperating with the clamping drive group in the two clamping groups in the clamping mechanism, thereby improving the stability and convenience of fixing the two ends of the composite rib, and then the pressing and moving testing mechanism presses the composite rib from a position close to one end of the composite rib and moves to the middle of the composite rib, gradually increasing the pressing force during the movement, thereby realizing the tensile strength test of the composite rib under the bending condition, simulating the tensile strength test of the composite rib under the non-uniform and non-single position pressing and bending load force in the actual use process, thereby improving the accuracy, reliability and representativeness of the tensile strength test of the composite rib.

Description

Technical Field

[0001] The invention relates to the technical field of composite reinforcement strength testing, and specifically proposes a basalt fiber composite reinforcement tensile strength testing device and method. Background Art

[0002] Basalt fiber composite rebar is a new type of building material, which is composed of basalt fiber and resin or other matrix materials. It has the advantages of high strength, good corrosion resistance, good heat resistance and good anti-aging performance. It is widely used in civil construction, marine engineering, environmental protection engineering, aerospace and automobile industry.

[0003] Tensile strength tests must be carried out when manufacturing basalt fiber composite rebars. The tensile strength test can verify whether the actual performance of the material is consistent with expectations, which is crucial to ensuring the reliability and stability of the material in practical applications.

[0004] The traditional tensile strength test of composite bars is to directly fix the two ends of the composite bars and then pull the composite bars to both sides to test the tensile strength of the composite bars. However, in actual use, composite bars are stretched in a bending deformation state in many cases, and the compressive bending load force applied to the composite bars during actual use is not uniform. Therefore, the traditional testing method may not reflect the tensile strength performance of the composite bars during use in most occasions. Summary of the invention

[0005] In view of the above problems, the embodiments of the present application provide a basalt fiber composite tendon tensile strength testing device and method to solve the technical problems in the related art.

[0006] In order to achieve the above-mentioned purpose, the embodiment of the present application provides the following technical solutions: a basalt fiber composite tendon tensile strength testing device, comprising: two fixed seats, one of which is fixedly mounted with a plug-in box, and the other fixed seat is slidably connected with the same plug-in box through a distance adjustment component, the plug-in box is a rectangular box structure with a circular cavity as the inner cavity, and the plug-in box is provided with plug holes connected to its inner wall on both sides arranged along its width direction, and a clamping mechanism for clamping the two ends of the composite tendon is commonly installed on the two plug-in boxes.

[0007] A herringbone frame is installed on the top of the two fixed seats, one end of the herringbone frame is slidably connected to the insertion box slidably connected to the fixed seat, a horizontal seat is installed between the two inclined surfaces on the inner side of the herringbone frame, and the lower end surface of the horizontal seat is connected to a pressing and moving testing mechanism that slides along its length direction.

[0008] The clamping mechanism includes two symmetrically arranged clamping groups, which are respectively installed in two insertion boxes. A clamping drive group for driving the two clamping groups is installed on the top of the horizontal seat, and a cylindrical blocking rod is installed in a socket on one insertion box away from the other insertion box.

[0009] The clamping group includes a plurality of arc-shaped clamping plates connected in the circular cavity of the insertion box, radially sliding along the circular cavity and uniformly arranged circumferentially, the plurality of arc-shaped clamping plates forming a tapered structure with a small-diameter end facing the middle of the herringbone frame, a reset assembly is installed between the arc-shaped clamping plates and the insertion box, a clamping ring sleeved on the plurality of arc-shaped clamping plates is installed in the circular cavity of the insertion box, the inner ring surface of the clamping ring presents a tapered structure with a small-diameter end facing the middle of the herringbone frame, and a supplementary clamping assembly is installed on the inner wall of the large-diameter end of the arc-shaped clamping plate.

[0010] In one possible implementation, the clamping drive group includes through grooves that are opened on both sides of the insertion box along its length direction and connected to the inner cavity. The outer ring surface of the clamping ring is slidably connected to the inner cavity of the insertion box through a sliding block. The outer ring surface of the clamping ring is also equipped with two Z-shaped pull rods that are symmetrically arranged and pass through the corresponding through grooves respectively. Inclined plates are installed on both sides of the middle part of the herringbone frame along its width direction. The lower end of the inclined plate is rotatably connected to a bidirectional screw. The two ends of the bidirectional screw are respectively connected to the two Z-shaped pull rods located on the same side of the herringbone frame through threaded cooperation. A rotating drive assembly that drives the two bidirectional screws to rotate is installed on the horizontal seat.

[0011] In one possible implementation, the rotary drive assembly includes a bidirectional cylinder installed on the top of a horizontal seat through a machine base, both telescopic ends of the bidirectional cylinder are installed with inverted L-shaped frames, a rack is installed at the bottom of the vertical section of the inverted L-shaped frame, and a gear that meshes with the rack is fixedly connected to the bidirectional screw.

[0012] In one possible implementation, the reset assembly includes an ear seat installed on the inner wall of the insertion box, and a T-shaped rod connected to the outer wall of the large-diameter end of the arc-shaped clamp is slidably connected to the ear seat. After the T-shaped rod slides through the ear seat, it is connected to the inner wall of the insertion box through a reset spring 1. A spring groove is provided on the side wall of the socket where the small-diameter end of the arc-shaped clamp is located. The spring groove passes through the outer wall of the insertion box, and an L-shaped guide bar slidably connected to the spring groove is installed on the outer wall of the small-diameter end of the arc-shaped clamp, and a reset spring 2 is installed between the L-shaped guide bar and the spring groove.

[0013] In one possible implementation, the supplementary clamping assembly includes two inclined ribs connected to the inner wall of the large-diameter end of the arc-shaped clamp and arranged symmetrically, and the end surfaces of the two inclined ribs away from the arc-shaped clamp are jointly installed with a supplementary arc clamp, and rubber pads are installed on the inner arc surfaces of the supplementary arc clamp and the arc-shaped clamp to increase the friction between the supplementary arc clamp, the arc-shaped clamp and the composite ribs.

[0014] In one possible implementation, an arc guide plate is installed on the arc clamp in the insertion box on which the cylindrical baffle rod is installed, and an arc guide plate is also installed on the supplementary arc clamp connected to the arc clamp in another insertion box. The multiple arc guide plates respectively pass through the corresponding sockets and are all bent in a direction away from the center of the socket.

[0015] In a possible implementation, a fixing bar located above the horizontal seat is installed between the two inclined plates.

[0016] The pressing movement testing mechanism includes a pressing roller for pressing the composite rib and a pressing driving group for driving the pressing roller. The pressing driving group drives the pressing roller to slide along the horizontal seat from a position close to one of the fixed seats to the middle of the horizontal seat and gradually increases the pressing force of the pressing roller on the composite rib during the movement.

[0017] In one possible implementation, the pressure driving group includes a T-shaped slide groove opened at the bottom of the horizontal seat, a horizontal section is slidably connected to the slide groove and a T-shaped seat is horizontally perpendicular to the horizontal seat, a hydraulic cylinder is installed at the bottom of the T-shaped seat, a connecting seat is installed at the telescopic end of the hydraulic cylinder, and the pressure roller is rotatably connected to the connecting seat.

[0018] In one possible implementation, the distance adjustment component includes a sliding groove opened on a fixed seat, a one-way screw is rotatably connected in the sliding groove, the one-way screw is connected to the corresponding insertion box by threaded cooperation, and the outer wall of the slidingly connected insertion box is installed with a limit plate that interferes with the end of the herringbone frame.

[0019] The present invention also provides a method for testing the tensile strength of basalt fiber composite bars, comprising the following steps: S1, insertion: inserting the composite bar from the insertion hole between two insertion boxes, with the two ends of the composite bar respectively located in the two insertion boxes, and one end of the composite bar is tightly pressed against a cylindrical stop rod, and the cylindrical stop rod limits the end of the composite bar.

[0020] S2. End clamping: The clamping drive group drives the two clamping rings to move, and the clamping rings move from the small-diameter end of the conical structure composed of multiple arc-shaped clamping plates to the large-diameter end. During the movement, the clamping rings push the multiple arc-shaped clamping plates arranged circumferentially to contract until the small-diameter ends of the multiple arc-shaped clamping plates arranged circumferentially clamp the composite reinforcement. When the arc-shaped clamping plates and the clamping rings clamp the composite reinforcement, they also exert a certain pulling force on the composite reinforcement, so that the composite reinforcement is in a straightened state. When the arc-shaped clamping plates clamp the composite reinforcement, they also drive the supplementary clamping components to clamp the composite reinforcement, thereby realizing double clamping of the ends of the composite reinforcement.

[0021] S3. Compression test: The hydraulic cylinder drives the pressure roller to contact the composite rib through the connecting seat. The T-shaped seat is connected to an external driving source (such as an electric slider) to drive the T-shaped seat to move along the slide groove. The T-shaped seat drives the pressure roller to move along the composite rib from a position close to one of the insertion boxes to the middle of the composite rib. During the movement, the hydraulic cylinder continuously increases the pressure applied to the pressure roller, and the pressure roller continuously increases its resistance to the composite rib until the composite rib bends or breaks, simulating the pressure on the composite rib during use, and testing the tensile strength of the composite rib when it changes from a horizontal state to a bent state.

[0022] S4. Remove after test completion: The tensile strength of the composite reinforcement can be calculated and evaluated by the pressure value of the composite reinforcement displayed by the pressure sensor arranged on the hydraulic cylinder. After the test, the clamping mechanism no longer clamps the composite reinforcement, and then rotates the one-way screw. The one-way screw drives the corresponding insertion box to move through the threaded engagement, thereby increasing the distance between the two insertion boxes, and then removes the composite reinforcement after the test.

[0023] The above one or more technical solutions in the embodiments of the present invention have at least one of the following beneficial effects: 1. The present invention realizes integrated clamping and fixing of the two ends of the composite rib by cooperating with the clamping drive group in the two clamping groups in the clamping mechanism, thereby improving the stability and convenience of fixing the two ends of the composite rib, and then the composite rib is pressed from a position close to one end of the composite rib by the pressing and moving test mechanism and moves toward the middle of the composite rib, and the pressing force is gradually increased during the movement to realize the tensile strength test of the composite rib under the bending condition, simulating the tensile strength test of the composite rib under the non-uniform and non-single position pressing and bending load force to which the composite rib is subjected during actual use, thereby improving the accuracy, reliability and representativeness of the tensile strength test of the composite rib.

[0024] 2. The retaining ring in the present invention pushes the multiple arc-shaped clamping plates arranged circumferentially to contract and clamp the composite ribs during the movement. The arc-shaped clamping plates cooperate with the retaining ring to clamp and fix the composite ribs, and also exert a certain pulling force on the composite ribs, so that the composite ribs are in a straightened state, so that the composite ribs can be tested for tensile strength by the subsequent pressing and moving testing mechanism, thereby further improving the accuracy of the tensile strength test.

[0025] 3. The supplementary clamping assembly in the present invention cooperates with the arc-shaped clamping plate so that each end of the composite reinforcement is clamped and fixed at two locations, thereby improving the fixing strength of the composite reinforcement, preventing the composite reinforcement from moving during testing, and thereby improving the accuracy of the composite reinforcement tensile strength test. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0027] Figure 1 It is a schematic diagram of the three-dimensional structure from a first viewing angle of the tensile strength testing device of the present invention.

[0028] Figure 2 It is a schematic diagram of the three-dimensional structure of the tensile strength testing device of the present invention from a second viewing angle.

[0029] Figure 3 It is a three-dimensional structural schematic diagram of the clamping group of the present invention.

[0030] Figure 4 The present invention Figure 1 A top sectional view of .

[0031] Figure 5 The present invention Figure 4 A local enlarged schematic diagram of point A.

[0032] Figure 6 It is a structural schematic diagram of the pressure driving group of the present invention.

[0033] Figure numerals: 1, fixed seat; 2, insertion box; 3, distance adjustment assembly; 30, sliding groove; 31, one-way screw; 32, limit plate; 4, plug hole; 5, clamping mechanism; 50, clamping group; 501, arc clamping plate; 502, clamping ring; 51, clamping drive group; 510, through groove; 511, Z-shaped pull rod; 512, inclined plate; 513, bidirectional screw; 530, bidirectional cylinder; 531, inverted L-shaped frame; 532, rack; 533, gear; 52, cylindrical stop rod; 540, ear seat; 541, T-shaped rod; 542, reset spring 1; 543, spring groove; 544, L-shaped guide bar; 545, reset spring 2; 550, inclined rib; 551, supplementary arc clamp; 560, arc guide plate; 570, fixing bar; 6, herringbone frame; 7, horizontal seat; 8, pressing mobile test mechanism; 80, pressing roller; 81, pressing drive group; 810, slide groove; 811, T-shaped seat; 812, hydraulic cylinder; 813, connecting seat; 9, composite rib. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] In order to enable those skilled in the art to better understand the scheme of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0036] See also Figure 1 , Figure 2 and Figure 4 A basalt fiber composite tendon tensile strength testing device comprises: two fixed seats 1, one of which is fixedly mounted with an insertion box 2, and the other fixed seat 1 is slidably connected with the same insertion box 2 through a distance adjustment component 3, the insertion box 2 is a rectangular box structure with a circular cavity inside, and both sides of the insertion box 2 arranged along the width direction are provided with insertion holes 4 connected with the inner wall thereof, and the two insertion boxes 2 are jointly mounted with a clamping mechanism 5 for clamping the two ends of the composite tendon 9.

[0037] See also Figure 1 A herringbone frame 6 is installed on the top of the two fixed seats 1, one end of the herringbone frame 6 is slidably connected to the insertion box 2 slidably connected to the fixed seat 1, and a horizontal seat 7 is installed between the two inclined surfaces on the inner side of the herringbone frame 6. The lower end surface of the horizontal seat 7 is connected to a pressing and moving testing mechanism 8 that slides along its length direction.

[0038] See also Figure 1 , Figure 2 , Figure 4 and Figure 5 The clamping mechanism 5 includes two symmetrically arranged clamping groups 50, which are respectively installed in two insertion boxes 2. A clamping driving group 51 for driving the two clamping groups 50 is installed on the top of the horizontal seat 7, and a cylindrical blocking rod 52 is installed in the insertion hole 4 on one insertion box 2 away from the other insertion box 2.

[0039] The composite rib 9 is inserted between the two insertion boxes 2 from the insertion hole 4. The two ends of the composite rib 9 are respectively located in the two insertion boxes 2, and one end of the composite rib 9 is pressed against the cylindrical blocking rod 52. The cylindrical blocking rod 52 positions the end of the composite rib 9 so that the two clamping groups 50 can clamp the two ends of the composite rib 9 with high strength and stability.

[0040] See also Figure 1 , Figure 3 , Figure 4 and Figure 5The clamping group 50 includes a plurality of arc-shaped clamping plates 501 connected in the circular cavity of the insertion box 2, radially sliding along the circular cavity and uniformly arranged circumferentially, the plurality of arc-shaped clamping plates 501 forming a tapered structure with the small-diameter end facing the middle of the herringbone frame 6, a reset component is installed between the arc-shaped clamping plates 501 and the insertion box 2, a retaining ring 502 sleeved on the plurality of arc-shaped clamping plates 501 is installed in the circular cavity of the insertion box 2, the inner ring surface of the retaining ring 502 presents a tapered structure with the small-diameter end facing the middle of the herringbone frame 6, and a supplementary clamping component is installed on the inner wall of the large-diameter end of the arc-shaped clamping plate 501.

[0041] In the initial state, the plurality of arc-shaped clamping plates 501 arranged circumferentially are in an unfolded state, so as to facilitate the insertion of the composite rib 9 into the insertion box 2. Then, the clamping drive group 51 drives the two clamping rings 502 to move. The inner ring surface of the clamping ring 502 is installed with a ball (not shown in the figure). The ball is used to reduce the friction between the clamping ring 502 and the outer arc surface of the arc-shaped clamping plate 501 during the movement. The clamping ring 502 moves from the small-diameter end composed of the plurality of arc-shaped clamping plates 501 to the large-diameter end. During the movement, the clamping ring 502 pushes the plurality of arc-shaped clamping plates 501 arranged circumferentially to shrink until The small-diameter ends of the multiple arc-shaped clamps 501 arranged circumferentially clamp and fix the composite rib 9. When the arc-shaped clamps 501 cooperate with the retaining rings 502 to clamp and fix the composite rib 9, there is also a certain pulling force on the composite rib 9 from the middle of the herringbone frame 6 to the insertion box 2, so that the composite rib 9 is in a straightened state, so as to facilitate the subsequent pressing and moving test mechanism 8 to test the tensile strength of the composite rib 9. When clamping the composite rib 9, the arc-shaped clamps 501 also drive the supplementary clamping components to clamp the composite rib 9, thereby improving the strength of the clamping group 50 to clamp and fix the composite rib 9.

[0042] See also Figure 1 , Figure 2 , Figure 4 and Figure 5 The clamping drive group 51 includes through grooves 510 that are opened on both sides of the insertion box 2 along its length direction and connected to the inner cavity. The outer ring surface of the clamping ring 502 is slidably connected to the inner cavity of the insertion box 2 through a sliding block. The outer ring surface of the clamping ring 502 is also equipped with two Z-shaped pull rods 511 that are symmetrically arranged and pass through the corresponding through grooves 510 respectively. The middle part of the herringbone frame 6 is equipped with inclined plates 512 on both sides along its width direction. The lower end of the inclined plate 512 is rotatably connected with a bidirectional screw 513. The two ends of the bidirectional screw 513 are respectively connected to the two Z-shaped pull rods 511 located on the same side of the herringbone frame 6 by threaded cooperation. A rotating drive component that drives the two bidirectional screws 513 to rotate is installed on the horizontal seat 7.

[0043] See also Figure 1 and Figure 2The rotary drive assembly includes a bidirectional cylinder 530 installed on the top of the horizontal seat 7 through a machine base, and both telescopic ends of the bidirectional cylinder 530 are installed with an inverted L-shaped frame 531, and a rack 532 is installed at the bottom of the vertical section of the inverted L-shaped frame 531. A gear 533 that meshes with the rack 532 is fixedly connected to the bidirectional screw 513.

[0044] Start the bidirectional cylinder 530, which drives the rack 532 to move via the inverted L-shaped frame 531. The rack 532 drives the bidirectional screw 513 to rotate through the meshing transmission between it and the gear 533 during the movement. The bidirectional screw 513 drives the Z-shaped pull rod 511 to move through threaded cooperation during the rotation. The two Z-shaped pull rods 511 on the same retaining ring 502 synchronously drive the retaining ring 502 to move in the opposite direction, thereby improving the stability of the movement of the retaining ring 502.

[0045] See also Figure 5 The reset assembly includes an ear seat 540 installed on the inner wall of the insertion box 2, and a T-shaped rod 541 connected to the outer wall of the large-diameter end of the arc-shaped clamping plate 501 is slidably connected to the ear seat 540. After the T-shaped rod 541 slides through the ear seat 540, it is connected to the inner wall of the insertion box 2 through a reset spring 1 542. A spring groove 543 is provided on the side wall of the insertion hole 4 where the small-diameter end of the arc-shaped clamping plate 501 is located. The spring groove 543 penetrates the outer wall of the insertion box 2, and an L-shaped guide bar 544 slidably connected to the spring groove 543 is installed on the outer wall of the small-diameter end of the arc-shaped clamping plate 501, and a reset spring 2 545 is installed between the L-shaped guide bar 544 and the spring groove 543.

[0046] In the initial state, the return spring 1 542 and the return spring 2 545 are both in a contracted state, so that the plurality of arc-shaped clamping plates 501 arranged circumferentially are in an expanded state, so as to facilitate the insertion of the composite rib 9 .

[0047] See also Figure 3 and Figure 5 The supplementary clamping assembly includes two inclined ribs 550 connected to the inner wall of the large-diameter end of the arc-shaped clamping plate 501 and arranged symmetrically. The end surfaces of the two inclined ribs 550 away from the arc-shaped clamping plate 501 are jointly installed with a supplementary arc clamping plate 551. The supplementary arc clamping plate 551 cooperates with the arc-shaped clamping plate 501, so that each end of the composite rib 9 is clamped and fixed at two places, thereby improving the fixing strength of the composite rib 9. Rubber pads are installed on the inner arc surfaces of the supplementary arc clamping plate 551 and the arc-shaped clamping plate 501, thereby improving the friction between the supplementary arc clamping plate 551 and the arc-shaped clamping plate 501 and the composite rib 9, thereby improving the clamping firmness.

[0048] See also Figure 3 and Figure 5An arc guide plate 560 is installed on the arc clamping plate 501 in the insertion box 2 on which the cylindrical blocking rod 52 is installed, and an arc guide plate 560 is also installed on the supplementary arc clamping plate 551 connected to the arc clamping plate 501 in another insertion box 2. Multiple arc guide plates 560 respectively penetrate the corresponding insertion holes 4 and are all bent in the direction away from the center of the insertion hole 4. The composite rib 9 is inserted into the insertion box 2 from the large diameter of the trumpet-shaped area formed by the arc guide plates 560. The arc guide plates 560 guide and limit the composite rib 9 to facilitate the insertion of the composite rib 9 into the insertion hole 4.

[0049] See also Figure 1 A fixing bar 570 located above the horizontal seat 7 is installed between the two inclined plates 512. The fixing bar 570 is provided to enhance the structural strength between the two inclined plates 512 and between the inclined plates 512 and the herringbone frame 6, thereby improving the stability of the inclined plates 512 and the bidirectional screw 513.

[0050] See also Figure 1 and Figure 6 The pressing moving test mechanism 8 includes a pressing roller 80 for pressing the composite rib 9 and a pressing driving group 81 for driving the pressing roller 80. The pressing driving group 81 drives the pressing roller 80 to slide along the horizontal seat 7 from a position close to one of the fixed seats 1 to the middle of the horizontal seat 7 and gradually increases the pressing force of the pressing roller 80 on the composite rib 9 during the movement.

[0051] See also Figure 1 , Figure 2 and Figure 6 The pressure driving group 81 includes a T-shaped slide groove 810 opened at the bottom of the horizontal seat 7, and a T-shaped seat 811 with a horizontal section that is horizontally perpendicular to the horizontal seat 7 is slidably connected to the slide groove 810. A hydraulic cylinder 812 is installed at the bottom of the T-shaped seat 811, and a connecting seat 813 is installed at the telescopic end of the hydraulic cylinder 812. The pressure roller 80 is rotatably connected to the connecting seat 813, and the middle part of the pressure roller 80 is concave arc-shaped.

[0052] After the composite rib 9 is fixed, the hydraulic cylinder 812 drives the pressing roller 80 to contact the composite rib 9 through the connecting seat 813. The middle part of the pressing roller 80 with an inwardly concave arc shape is stuck on the composite rib 9, so that the pressing roller 80 can accurately and stably press the composite rib 9. The T-shaped seat 811 is connected to an external driving source (such as an electric slider) to drive the T-shaped seat 811 to move along the slide groove 810. The T-shaped seat 811 drives the pressing roller 80 to move along the composite rib 9 from a position close to one of the insertion boxes 2 to the middle of the composite rib 9. During the movement, the hydraulic cylinder 812 continuously increases the pressure applied to the pressing roller 80, and the pressing roller 80 continuously increases its resistance to the composite rib 9 until the composite rib 9 bends or breaks, simulating the resistance pressure received by the composite rib 9 during use and testing the tensile strength of the composite rib 9 when it changes from a horizontal state to a bent state.

[0053] See also Figure 1 and Figure 2 The distance adjustment component 3 includes a sliding groove 30 provided on the fixed seat 1, and a one-way screw 31 is rotatably connected in the sliding groove 30. The one-way screw 31 is connected to the corresponding insertion box 2 by threaded matching. The outer wall of the slidingly connected insertion box 2 is installed with a limit plate 32 that contacts the end of the herringbone frame 6. In the initial state, the insertion box 2 and the sliding groove 30 are pressed against the side wall of another insertion box 2, thereby improving the stability of the insertion box 2 during the test of the composite rib 9; when the composite rib 9 bends and cracks during the test, the clamping mechanism 5 no longer clamps the composite rib 9, and then rotates the one-way screw 31, and the one-way screw 31 drives the corresponding insertion box 2 to move by threaded matching, thereby increasing the distance between the two insertion boxes 2, so as to facilitate the removal of the bent and cracked composite rib 9.

[0054] The present invention also provides a method for testing the tensile strength of basalt fiber composite bars, comprising the following steps: S1, insertion: inserting the composite bar 9 from the insertion hole 4 between the two insertion boxes 2, with the two ends of the composite bar 9 respectively located in the two insertion boxes 2, and one end of the composite bar 9 is tightly pressed against the cylindrical stop rod 52, and the cylindrical stop rod 52 limits the end of the composite bar 9.

[0055] S2. End clamping: The clamping drive group 51 drives the two clamping rings 502 to move, and the clamping rings 502 move from the small-diameter end of the conical structure composed of multiple arc-shaped clamping plates 501 to the large-diameter end. During the movement, the clamping rings 502 push the multiple arc-shaped clamping plates 501 arranged circumferentially to shrink until the small-diameter ends of the multiple arc-shaped clamping plates 501 arranged circumferentially clamp the composite rib 9. When the arc-shaped clamping plates 501 cooperate with the clamping rings 502 to clamp and fix the composite rib 9, a certain pulling force is also exerted on the composite rib 9, so that the composite rib 9 is in a straightened state. When the arc-shaped clamping plates 501 clamp the composite rib 9, they also drive the supplementary clamping components to clamp the composite rib 9, thereby realizing double clamping of the ends of the composite rib 9.

[0056] S3. Compression test: The hydraulic cylinder 812 drives the pressing roller 80 to contact the composite rib 9 through the connecting seat 813. The T-shaped seat 811 is connected to an external driving source (such as an electric slider) to drive the T-shaped seat 811 to move along the slide groove 810. The T-shaped seat 811 drives the pressing roller 80 to move along the composite rib 9 from a position close to one of the insertion boxes 2 to the middle of the composite rib 9. During the movement, the hydraulic cylinder 812 continuously increases the pressure applied to the pressing roller 80, and the pressing roller 80 continuously increases its resistance to the composite rib 9 until the composite rib 9 bends or breaks, simulating the pressure on the composite rib 9 during use, and testing the tensile strength of the composite rib 9 when it changes from a horizontal state to a bent state.

[0057] S4. Remove after test is completed: The tensile strength of the composite rib 9 can be calculated and evaluated by the pressure value of the composite rib 9 displayed by the pressure sensor arranged on the hydraulic cylinder 812. After the test is completed, the clamping mechanism 5 no longer clamps the composite rib 9, and then rotates the one-way screw 31. The one-way screw 31 drives the corresponding insertion box 2 to move through threaded engagement, thereby increasing the distance between the two insertion boxes 2, and then removes the composite rib 9 after the test.

[0058] In the description of the present invention, it is necessary to understand that the terms "length", "width", "up", "down", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0059] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "connect", "install", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0060] The embodiments of this specific implementation method are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, all equivalent changes made according to the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A basalt fiber composite reinforcement tensile strength testing device, characterized in that: include: Two fixed seats (1), one of which is fixedly mounted with an insertion box (2), and the other fixed seat (1) is slidably connected with a similar insertion box (2) via a distance adjustment component (3), the insertion box (2) being a rectangular box structure with a circular cavity inside, both sides of the insertion box (2) arranged along its width direction are provided with insertion holes (4) communicating with its inner wall, and the two insertion boxes (2) are jointly mounted with a clamping mechanism (5) for clamping two ends of a composite rib (9); A herringbone frame (6) is installed on the top of the two fixed seats (1), one end of the herringbone frame (6) is slidably connected to a plug-in box (2) slidably connected to the fixed seat (1), a horizontal seat (7) is installed between two inclined surfaces on the inner side of the herringbone frame (6), and a pressing and moving testing mechanism (8) that slides along its length direction is connected to the lower end surface of the horizontal seat (7); The clamping mechanism (5) comprises two symmetrically arranged clamping groups (50), the two clamping groups (50) being respectively installed in two insertion boxes (2), a clamping driving group (51) for driving the two clamping groups (50) being installed on the top of the horizontal seat (7), and a cylindrical blocking rod (52) being installed in a plug hole (4) on one of the insertion boxes (2) away from the other insertion box (2); The clamping group (50) comprises a plurality of arc-shaped clamping plates (501) connected in the circular cavity of the insertion box (2), radially sliding along the circular cavity and uniformly arranged in the circumferential direction, the plurality of arc-shaped clamping plates (501) forming a tapered structure with the small-diameter end facing the middle of the herringbone frame (6), a reset component is installed between the arc-shaped clamping plates (501) and the insertion box (2), a clamping ring (502) sleeved on the plurality of arc-shaped clamping plates (501) is installed in the circular cavity of the insertion box (2), the inner ring surface of the clamping ring (502) presents a tapered structure with the small-diameter end facing the middle of the herringbone frame (6), and a supplementary clamping component is installed on the inner wall of the large-diameter end of the arc-shaped clamping plate (501); The pressing and moving testing mechanism (8) comprises a pressing roller (80) for pressing the composite rib (9) and a pressing driving group (81) for driving the pressing roller (80); the pressing driving group (81) drives the pressing roller (80) to slide along the horizontal seat (7) from a position close to one of the fixed seats (1) to the middle of the horizontal seat (7) and gradually increases the pressing force of the pressing roller (80) on the composite rib (9) during the movement.

2. According to claim 1, a basalt fiber composite reinforcement tensile strength testing device is characterized by: The clamping drive group (51) comprises through grooves (510) which are arranged on both sides of the insertion box (2) along its length direction and are connected to the inner cavity. The outer ring surface of the clamping ring (502) is slidably connected to the inner cavity of the insertion box (2) through a sliding block. The outer ring surface of the clamping ring (502) is also equipped with two Z-shaped pull rods (511) which are symmetrically arranged and respectively pass through the corresponding through grooves (510). The middle part of the herringbone frame (6) is equipped with inclined plates (512) on both sides arranged along its width direction. The lower end of the inclined plate (512) is rotatably connected to a bidirectional screw rod (513). The two ends of the bidirectional screw rod (513) are respectively connected to the two Z-shaped pull rods (511) located on the same side of the herringbone frame (6) by threaded engagement. A rotating drive component for driving the two bidirectional screw rods (513) to rotate is installed on the horizontal seat (7).

3. The basalt fiber composite reinforcement tensile strength testing device according to claim 1, characterized in that: The reset assembly comprises an ear seat (540) mounted on the inner wall of the insertion box (2); a T-shaped rod (541) connected to the outer wall of the large-diameter end of the arc-shaped clamping plate (501) is slidably connected to the ear seat (540); the T-shaped rod (541) slides through the ear seat (540) and is connected to the inner wall of the insertion box (2) via a reset spring 1 (542); a spring groove (543) is provided on the side wall of the insertion hole (4) where the small-diameter end of the arc-shaped clamping plate (501) is located; the spring groove (543) penetrates the outer wall of the insertion box (2); an L-shaped guide bar (544) slidably connected to the spring groove (543) is mounted on the outer wall of the small-diameter end of the arc-shaped clamping plate (501); a reset spring 2 (545) is mounted between the L-shaped guide bar (544) and the spring groove (543).

4. The basalt fiber composite reinforcement tensile strength testing device according to claim 1, characterized in that: The pressure driving group (81) comprises a slide groove (810) with a T-shaped structure opened at the bottom of the horizontal seat (7); a T-shaped seat (811) with a horizontal section and a horizontal vertical relationship with the horizontal seat (7) is slidably connected to the slide groove (810); a hydraulic cylinder (812) is installed at the bottom of the T-shaped seat (811); a connecting seat (813) is installed at the telescopic end of the hydraulic cylinder (812); and the pressure roller (80) is rotatably connected to the connecting seat (813).

5. The basalt fiber composite reinforcement tensile strength testing device according to claim 2, characterized in that: The rotary drive assembly comprises a bidirectional cylinder (530) mounted on the top of a horizontal seat (7) via a machine base, both telescopic ends of the bidirectional cylinder (530) are mounted with an inverted L-shaped frame (531), a rack (532) is mounted at the bottom of the vertical section of the inverted L-shaped frame (531), and a gear (533) meshing with the rack (532) is fixedly connected to the bidirectional screw rod (513).

6. The basalt fiber composite reinforcement tensile strength testing device according to claim 1, characterized in that: The distance adjustment component (3) comprises a sliding groove (30) provided on the fixed seat (1), a one-way screw (31) being rotatably connected in the sliding groove (30), the one-way screw (31) being connected to a corresponding insertion box (2) by means of threaded engagement, and a limiting plate (32) abutting against an end of a herringbone frame (6) being installed on an outer wall of the slidingly connected insertion box (2).

7. The basalt fiber composite reinforcement tensile strength testing device according to claim 1, characterized in that: The supplementary clamping assembly comprises two inclined ribs (550) connected to the inner wall of the large-diameter end of the arc-shaped clamping plate (501) and arranged symmetrically, and the end surfaces of the two inclined ribs (550) away from the arc-shaped clamping plate (501) are jointly installed with a supplementary arc clamping plate (551).

8. The basalt fiber composite reinforcement tensile strength testing device according to claim 7, characterized in that: An arc-shaped guide plate (560) is installed on the arc-shaped clamping plate (501) in the insertion box (2) on which the cylindrical blocking rod (52) is installed, and an arc-shaped guide plate (560) is also installed on the supplementary arc-shaped clamping plate (551) connected to the arc-shaped clamping plate (501) in another insertion box (2). The plurality of arc-shaped guide plates (560) respectively penetrate the corresponding insertion holes (4) and are all bent in a direction away from the center of the insertion hole (4).

9. The basalt fiber composite reinforcement tensile strength testing device according to claim 2, characterized in that: A fixing bar (570) located above the horizontal seat (7) is installed between the two inclined plates (512).

10. A method for testing the tensile strength of basalt fiber composite bars, using the basalt fiber composite bar tensile strength testing device as claimed in claim 1, characterized in that: The following steps are involved: S1, inserting: inserting the composite rib (9) from the insertion hole (4) between the two insertion boxes (2), with the two ends of the composite rib (9) respectively located in the two insertion boxes (2), and one end of the composite rib (9) tightly abutting against the cylindrical stop rod (52); S2, end clamping: the clamping drive group (51) drives the two clamping rings (502) to move, and the clamping rings (502) move from the small-diameter end of the conical structure composed of a plurality of arc-shaped clamping plates (501) to the large-diameter end until the small-diameter end of the plurality of arc-shaped clamping plates (501) arranged circumferentially clamps and fixes the composite rib (9), and the arc-shaped clamping plates (501) also drive the supplementary clamping components to clamp the composite rib (9) when clamping the composite rib (9); S3, pressure test: the pressure driving group (81) drives the pressure roller (80) to move along the composite rib (9) from a position close to one of the insertion boxes (2) to the middle of the composite rib (9), and during the movement, the pressure driving group (81) continuously increases the pressure applied to the composite rib (9) until the composite rib (9) bends or breaks, simulating the pressure applied to the composite rib (9) during use, and testing the tensile strength of the composite rib (9) when it changes from a horizontal state to a bent state; S4, removal after test completion: the tensile strength of the composite rib (9) is calculated and determined by the pressing force applied by the pressing roller (80) driven by the pressing driving group (81) to the composite rib (9), and after the test is completed, the clamping mechanism (5) no longer clamps the composite rib (9), the distance adjustment component (3) drives the corresponding insertion box (2) to move, the distance between the two insertion boxes (2) increases, and then the composite rib (9) after the test is removed.

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