Prestressed steel strand performance detection equipment

Abstract

The invention relates to the technical field of detection equipment, and particularly discloses prestressed steel strand performance detection equipment which comprises a machine body and an adjustable test bed installed at the top of the machine body through an inclination angle adjusting unit, and the top of the adjustable test bed is further provided with a continuous impact unit, a guide unit and two multistage clamping units which are in bilateral symmetry. The multi-stage clamping and fixing unit comprises a first-stage bending and clamping and fixing assembly, a bending control assembly and a second-stage circumferential clamping and fixing assembly. According to the invention, tensile strength detection and fatigue strength performance detection can be carried out when the steel strand is in a horizontal state, and tensile strength detection and fatigue strength performance detection can also be carried out when the steel strand is in an inclined state; according to the device, the first-stage bending and clamping assembly and the second-stage circumferential clamping assembly are matched with each other to carry out multi-stage clamping and fixing on the steel strand, so that multi-point and multi-direction clamping is realized, it is ensured that the steel strand is subjected to multi-direction uniform clamping force, and the steel strand is prevented from sliding in the tensile strength detection process.

Description

Technical Field

[0001] The invention relates to the technical field of detection equipment, and more specifically, to a prestressed steel strand performance detection device. Background Art

[0002] High-strength prestressed steel strand is an important material widely used in bridges, buildings, railways and other fields. It has the advantages of high tensile strength, good relaxation performance, stable linearity, uniform internal structure, etc. When preparing high-strength prestressed steel strand, the quality will be improved in the following ways: 1. Select SWRS92Si-TP wire rod as raw material to improve the tensile strength and toughness of steel; 2. Reduce the drawing speed during the wire drawing process to reduce deformation impact and improve cooling effect; 3. Use a larger proportion of online tension to ensure the linearity and relaxation performance of the finished high-strength prestressed steel strand. In order to ensure the production quality of high-strength prestressed steel strand, tensile strength and fatigue strength performance tests are required during the production process of high-strength prestressed steel strand.

[0003] At present, the tensile strength and fatigue strength test of steel strands is carried out by first taking two steel strands and installing them on the fixtures of the tensile testing machine and the fatigue testing machine respectively, and then applying tension and cyclic load to the two steel strands respectively until the steel strands break to complete the tensile strength and fatigue strength performance test. However, this testing method still has certain defects: 1. Currently, whether it is tensile strength testing or fatigue strength performance testing, the steel strands are mainly tested in a vertical or horizontal state. However, in actual engineering applications (such as bridges, cranes, etc.), the steel strands are in an inclined state, and the steel strands in the inclined state will be subjected to multi-directional forces including axial tension, radial force and tangential force. In addition, the stress distribution of the steel strands in the inclined state is different from that in the vertical or horizontal state. Therefore, in the absence of tests in the inclined state, it is impossible to evaluate the impact of multi-directional forces on the performance of the steel strands.

[0004] 2. Currently, before the tensile strength test of the steel strand, the steel strand is first placed in the clamp groove of the clamp so that the center line of the steel strand coincides with the center line of the clamp and then the steel strand is clamped. However, since the direction of the pulling force during the test is the same as the axial direction of the steel strand, as the pulling force gradually increases, the degree of wear on the contact surface between the clamp and the steel strand will increase, which will lead to the risk of slippage between the steel strand and the clamp, resulting in inaccurate or interrupted performance testing. Summary of the invention

[0005] The invention provides a prestressed steel strand performance detection device, which solves the technical problem of lack of testing on the inclination state of the steel strand in the prior art.

[0006] The present invention provides a prestressed steel strand performance detection device, which includes a machine body and an adjustable test bench installed on the top of the machine body through an inclination angle adjustment unit. A hydraulic cylinder is fixedly installed on the top of the adjustable test bench, and a rotation unit is arranged at the output end of the hydraulic cylinder. A continuous impact unit, a guiding unit, and two multi-stage clamping units that are symmetrical left and right are also arranged on the top of the adjustable test bench. The multi-stage clamping unit includes a first-stage bending clamping assembly, a bending control assembly, a second-stage circumferential clamping assembly, a拨动 control assembly, and a driving assembly two for driving the bending control assembly and the拨动 control assembly. The continuous impact unit includes an impact assembly, and the inclination angle adjustment unit includes an adjustment assembly and a driving assembly one for driving the adjustment assembly.

[0007] The driving assembly one includes two mounting boxes fixedly installed on the top of the machine body and symmetrical front and back. The adjustable test bench is located between the two mounting boxes. The adjustment assembly includes an adjustment sleeve slidably connected in the mounting box and a hinged plate fixedly installed on the top of the adjustment sleeve and hinged to the adjustable test bench. A mounting seat is fixedly installed on the top of the machine body on the right side of the adjustable test bench, and two hinged rods that are symmetrical front and back are hinged on the mounting seat. The hinged rods are hinged to the adjustable test bench.

[0008] Furthermore, the driving assembly one further includes a screw rod rotatably installed between the left and right inner walls of the mounting box. The adjustment sleeve is threadedly connected to the outside of the screw rod. The left end of the front mounting box is fixedly installed with an adjustment motor. The output shaft of the adjustment motor slidably penetrates through the front mounting box and is fixedly connected to the screw rod. The right end of the screw rod slidably penetrates through the mounting box and is fixedly sleeved with a pulley. A belt is传动连接 between the two pulleys.

[0009] Furthermore, the first-stage bending clamping assembly includes two L-shaped plates that are symmetrical front and back and a rotating shaft rotatably installed between the two L-shaped plates. A folding line wheel and a U-shaped frame are fixedly installed on the outside of the rotating shaft. The folding line wheel is located inside the U-shaped frame and is coaxial with the rotating shaft. A small cylinder one is fixedly installed on the top of the U-shaped frame, and a pressing block that cooperates with the folding line wheel is fixedly installed at the output end of the small cylinder one.

[0010] Furthermore, the bending control assembly includes two ear plates that are symmetrical front and back and located on the side of the rotating shaft close to the center of the adjustable test bench, and a rack fixedly installed on the side of the ear plate close to the rotating shaft. Both ends of the rotating shaft penetrate through the L-shaped plate and are fixedly sleeved with gears that mesh with the rack.

[0011] Furthermore, the second-stage circumferential clamping assembly includes a slide rail fixedly installed between the two L-shaped plates and located on the side of the L-shaped plate far from the rotating shaft, and the slide rail is located on the side of the ear plate far from the corresponding rotating shaft. Two clamping blocks that are symmetrical front and back and used for clamping the steel strand are slidably connected in the slide rail.

[0012] Furthermore, the toggle control component includes a control wheel with a control groove on the outside, two pairs of mounting plates fixedly installed on the side of the slide rail away from the clamping block and symmetrical front and back, a mounting shaft fixedly installed between the same pair of mounting plates, a toggle block rotatably installed on the outside of the mounting shaft, two toggle grooves symmetrical front and back are opened on the side of the slide rail away from the clamping block, the toggle block is L-shaped, and the two ends of the toggle block extend into the control groove and the corresponding toggle groove respectively, the slide rail is opened on the side away from the clamping block. A receiving groove located between the two toggle grooves and above the control wheel is opened, and the second driving component includes a second small cylinder fixedly installed in the receiving groove, and a movable plate is fixedly installed on the output end of the second small cylinder, and the movable plate and the ear plate are both fixedly installed on the outside of the control wheel, and threading holes for the steel strand to pass through are opened in the middle of the slide rail and at the center of the control wheel, and the two threading holes are concentric, and the movable plate is located on the side of the toggle block close to the corresponding rotating shaft.

[0013] Furthermore, the continuous impact unit also includes a reciprocating component, a driving component three for driving the impact component and a gantry fixedly installed on the top of the adjustable test bench, the impact component includes a fixed plate fixedly installed between the front and rear inner walls of the gantry and a return spring fixedly installed at the bottom of the fixed plate, a circular ring is fixedly installed at the bottom end of the return spring, a sliding rod is fixedly installed inside the circular ring, the top end of the sliding rod slides through the fixed plate, and the bottom end of the sliding rod is fixedly installed with an impact wheel.

[0014] Furthermore, the drive component three includes a mounting sleeve and a drive motor fixedly mounted in the mounting sleeve, an eccentric sleeve is rotatably mounted on the outer side of the output shaft of the drive motor, a connecting rod hinged to the top of the sliding rod is rotatably mounted on the front side of the eccentric sleeve, a round rod is fixedly mounted on the front side of the eccentric sleeve, a hinge point between the connecting rod and the eccentric sleeve is located on the side of the round rod away from the output shaft of the drive motor, and a moving sleeve rod is provided on the front fixed sleeve of the output shaft of the drive motor for moving the round rod, and the moving sleeve rod is located between the eccentric sleeve and the connecting rod.

[0015] Furthermore, the reciprocating assembly includes fixed frames fixedly installed on the left and right sides of the gantry and a reciprocating screw rod rotatably installed between the two fixed frames. The outer side of the reciprocating screw rod is threadedly connected with a reciprocating sleeve, and the mounting sleeve is fixedly installed at the bottom of the reciprocating sleeve.

[0016] Furthermore, the torsion unit includes a fixed sleeve fixedly installed on the output end of the hydraulic cylinder and a rotating frame rotatably installed on the right side of the fixed sleeve, the rotating frame is fixedly connected to the slide rail on the left, and the slide rail on the right is fixedly installed on the top of the adjustable test bench. A control motor is fixedly installed in the fixed sleeve, and the output shaft of the control motor is fixedly connected to the rotating frame. The guide unit includes two guide rails fixedly installed on the top of the adjustable test bench and symmetrically front and back, and a slider slidably connected to the top of the guide rails, and a support plate fixedly installed on the top of the slider is fixedly connected to the fixed sleeve.

[0017] The beneficial effects of the present invention are: 1. The present invention can perform tensile strength test and fatigue strength performance test on the steel strand in a horizontal state, and can also perform tensile strength test and fatigue strength performance test on the steel strand in an inclined state, so as to simulate the situation that the steel strand is in an inclined state in actual engineering applications (such as bridges, cranes and other scenes), evaluate the influence of multi-directional forces on the performance of the steel strand, effectively increase the diversity of detection through multi-mode detection under multiple states, better fit the actual use of the steel strand, and realize the improvement of the accuracy of the detection result, thereby making the detection result more authentic and representative.

[0018] 2. The present invention performs multi-stage clamping and fixing of the steel strands by cooperating with the primary bending clamping assembly and the secondary circumferential clamping assembly, thereby achieving multi-point and multi-directional clamping, ensuring that the steel strands are subjected to uniform clamping forces in multiple directions, and greatly increasing the friction between the steel strands and the clamping blocks and the folding wheels, thereby preventing the steel strands from sliding during the tensile strength test, ensuring that the test operation is carried out smoothly and efficiently, and improving the accuracy of the test results.

[0019] 3. The present invention bends the steel strands through a primary bending and clamping assembly so that the bent steel strands can be constrained by radial and tangential forces. This multi-directional force distribution forms a geometric locking effect, which not only increases the friction between the steel strands and the folding wheel, but also can more effectively prevent the steel strands from sliding, significantly improving the stability of the steel strands in the tensile strength test, thereby greatly improving the accuracy of the test results.

[0020] 4. The present invention can truly simulate the dynamic load and impact load that the steel strand may encounter in actual applications through continuous impact testing, and at the same time cooperate with tensile strength testing, thereby further making the test results more authentic and representative. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a three-dimensional structural schematic diagram of the present invention.

[0022] Figure 2 It is a three-dimensional structural schematic diagram of the installation box, screw rod, pulley, belt and adjustment motor part of the present invention.

[0023] Figure 3 It is a partial three-dimensional structural schematic diagram of the hydraulic cylinder, adjustable test bench, support plate and gantry frame of the present invention.

[0024] Figure 4 It is a partial three-dimensional structural schematic diagram of the guide rail, slide frame, fixing sleeve, primary bending clamping assembly and bending control assembly of the present invention.

[0025] Figure 5 It is a schematic diagram of the three-dimensional structure of the control motor, rotating frame, gear, rack and slide rail of the present invention.

[0026] Figure 6 It is a three-dimensional structural schematic diagram of the clamping block, small cylinder 1, pressing block, folding line wheel and small cylinder 2 of the present invention.

[0027] Figure 7 It is a three-dimensional structural schematic diagram of the mounting shaft,拨动 block, control wheel,拨动 groove and clamping block of the present invention.

[0028] Figure 8 It is a three-dimensional structural schematic diagram of the continuous impact unit of the present invention.

[0029] Fig. 9 It is a three-dimensional structural schematic diagram of the reciprocating lead screw, reciprocating sleeve, mounting sleeve and drive motor of the present invention.

[0030] In the figure: 1. Machine body; 2. Inclination adjustment unit; 201. Adjustment component; 202. Drive component 1; 2011. Adjustment sleeve; 2012. Hinge plate; 2013. Mounting seat; 2014. Hinge rod; 2021. Mounting box; 2022. Screw rod; 2023. Pulley; 2024. Belt; 2025. Adjustment motor; 3. Adjustable test bench; 4. Hydraulic cylinder; 5. Multi-stage clamping unit; 6. Continuous impact unit; 7. Rotary knob unit; 8. Guiding unit; 9. Steel strand; 501. First-level bending clamping component; 502. Bending control component; 503. Second-level circumferential clamping component; 504.拨动 control component; 505. Drive component 2; 5011. L-shaped plate; 5012. Rotating shaft; 5013. Folding line wheel; 5014. C-shaped frame; 5015. Small cylinder 1; 5016. Pressing block; 5021. Ear plate; 5022. Rack; 5023. Gear; 5031. Slide rail; 5032. Clamping block; 5041. Mounting plate; 5042. Mounting shaft; 5043.拨动 block; 5044. Control wheel; 5045.拨动 groove; 5051. Small cylinder 2; 5052. Moving plate; 601. Impact component; 602. Drive component 3; 603. Reciprocating component; 604. Gantry; 6011. Fixed plate; 6012. Return spring; 6013. Ring; 6014. Impact wheel; 6015. Slide bar; 6021. Mounting sleeve; 6022. Drive motor; 6023. Eccentric sleeve plate; 6024. Connecting rod; 6025. Round rod; 6026.拨动 sleeve rod; 6031. Fixed frame; 6032. Reciprocating lead screw; 6033. Reciprocating sleeve; 701. Fixed sleeve; 702. Control motor; 703. Rotating frame; 801. Guide rail; 802. Slide block; 803. Support plate. Detailed implementation method

[0031] Reference will now be made to exemplary embodiments to discuss the subject matter described herein. It should be understood that the discussion of these embodiments is provided to enable those skilled in the art to better understand and thus implement the subject matter described herein. Changes may be made to the functions and arrangements of the elements discussed without departing from the scope of protection of the content of this specification. Each example may omit, substitute, or add various processes or components as needed. Additionally, features described relative to some examples may be combined in other examples.

[0032] Refer to Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 8 , a prestressed steel strand performance detection device, comprising a machine body 1 and an adjustable test bench 3 installed on the top of the machine body 1 through an inclination angle adjustment unit 2. A hydraulic cylinder 4 is fixedly installed on the top of the adjustable test bench 3. A twisting unit 7 is arranged at the output end of the hydraulic cylinder 4. A continuous impact unit 6, a guiding unit 8 and two multi-stage clamping units 5 that are symmetric left and right are also arranged on the top of the adjustable test bench 3. The multi-stage clamping unit 5 includes a first-stage bending clamping assembly 501, a bending control assembly 502, a second-stage circumferential clamping assembly 503, a拨动 control assembly 504 and a driving assembly two 505 for driving the bending control assembly 502 and the拨动 control assembly 504. The continuous impact unit 6 includes an impact assembly 601. The inclination angle adjustment unit 2 includes an adjustment assembly 201 and a driving assembly one 202 for driving the adjustment assembly 201.

[0033] Refer to Figure 4 、 Figure 5 、 Figure 6 and Figure 7 , the first-stage bending clamping assembly 501 includes two L-shaped plates 5011 that are symmetric front and back and a rotating shaft 5012 rotatably installed between the two L-shaped plates 5011. A folding line wheel 5013 and a U-shaped frame 5014 are fixedly installed on the outside of the rotating shaft 5012. The folding line wheel 5013 is located inside the U-shaped frame 5014, and the folding line wheel 5013 is coaxial with the rotating shaft 5012. A small cylinder one 5015 is fixedly installed on the top of the U-shaped frame 5014. A pressing block 5016 that cooperates with the folding line wheel 5013 is fixedly installed at the output end of the small cylinder one 5015.

[0034] Refer to Figure 4 、 Figure 5 、 Figure 6 and Figure 7 , the bending control assembly 502 includes two ear plates 5021 that are symmetric front and back and are located on the side of the rotating shaft 5012 close to the center of the adjustable test bench 3, and a rack 5022 fixedly installed on the side of the ear plate 5021 close to the rotating shaft 5012. Both ends of the rotating shaft 5012 penetrate through the L-shaped plate 5011 and are fixedly sleeved with gears 5023 that mesh with the rack 5022. It should be noted that there may be some inaccuracies in the translation of "拨动 control assembly" as the specific meaning of "拨动" is not very clear. You may need to further clarify this term for a more accurate translation.

[0035] See also Figure 4 , Figure 5 , Figure 6 and Figure 7 The secondary circumferential clamping assembly 503 includes a slide rail 5031 fixedly installed between two L-shaped plates 5011 and located on the side of the L-shaped plate 5011 away from the rotating shaft 5012, and the slide rail 5031 is located on the side of the ear plate 5021 away from the corresponding rotating shaft 5012, and two clamping blocks 5032 that are symmetrical front and back and used to clamp the steel strand 9 are slidably connected in the slide rail 5031.

[0036] See also Figure 4 , Figure 5 , Figure 6 and Figure 7 The toggle control assembly 504 includes a control wheel 5044 with a control groove on the outside, two pairs of mounting plates 5041 fixedly mounted on the side of the slide rail 5031 away from the clamping block 5032 and symmetrical front and back, a mounting shaft 5042 fixedly mounted between the same pair of mounting plates 5041, a toggle block 5043 rotatably mounted on the outside of the mounting shaft 5042, two toggle grooves 5045 symmetrical front and back are opened on the side of the slide rail 5031 away from the clamping block 5032, the toggle block 5043 is L-shaped, and the two ends of the toggle block 5043 extend into the control groove and the corresponding toggle groove 5045 respectively, and a receiving groove located between the two toggle grooves 5045 and above the control wheel 5044 is opened on the side of the slide rail 5031 away from the clamping block 5032.

[0037] See also Figure 4 , Figure 5 , Figure 6 and Figure 7 The driving component 505 includes a small cylinder 5051 fixedly installed in the accommodating groove, and a movable plate 5052 is fixedly installed at the output end of the small cylinder 5051. The movable plate 5052 and the ear plate 5021 are both fixedly installed on the outside of the control wheel 5044. The middle of the slide rail 5031 and the center of the control wheel 5044 are provided with threading holes for the steel strand 9 to pass through, and the two threading holes are concentric. The movable plate 5052 is located on the side of the toggle block 5043 close to the corresponding rotating shaft 5012.

[0038] See also Figure 1 , Figure 2 , Figure 4 , Figure 5 , Figure 6 and Figure 7The torsion unit 7 includes a fixed sleeve 701 fixedly mounted on the output end of the hydraulic cylinder 4 and a rotating frame 703 rotatably mounted on the right side of the fixed sleeve 701, the rotating frame 703 is fixedly connected to the slide rail 5031 on the left, and the slide rail 5031 on the right is fixedly mounted on the top of the adjustable test bench 3. A control motor 702 is fixedly mounted in the fixed sleeve 701, and the output shaft of the control motor 702 is fixedly connected to the rotating frame 703. The guide unit 8 includes two guide rails 801 fixedly mounted on the top of the adjustable test bench 3 and symmetrically front and back, and a slider 802 slidably connected to the top of the guide rails 801, a support plate 803 fixedly mounted on the top of the slider 802 is fixedly connected to the fixed sleeve 701, and a tension sensor (not shown in the figure) is arranged between the output end of the hydraulic cylinder 4 and the fixed sleeve 701.

[0039] When in use, in the initial state, the yoke 5014 and the small cylinder 1 5015 are located below the folding wheel 5013. First, one end of the steel strand 9 to be tested is passed through the slide rail 5031 and the control wheel 5044 in sequence from between the two clamping blocks 5032 on the left, and is wound from between the folding wheel 5013 and the pressing block 5016 to the outside of the folding wheel 5013. Then, the small cylinder 1 5015 is started, and the output end of the small cylinder 1 5015 pushes the pressing block 5016 to press the steel strand 9 onto the folding wheel 5013. Then, the small cylinder 2 5051 is started, and the small cylinder The output end of the second 5051 pushes the movable plate 5052 to move toward the side close to the folding wheel 5013, thereby driving the control wheel 5044 to move synchronously, and then squeezes the toggle block 5043 through the control groove, so that the toggle block 5043 rotates around the installation shaft 5042, and the ends of the two toggle blocks 5043 located in the toggle groove 5045 are close to each other, so that the two toggle blocks 5043 push the two clamping blocks 5032 to move toward each other, and the steel strand 9 is clamped and fixed at the first level. At the same time, in the process of the control wheel 5044 moving toward the side close to the folding wheel 5013, The two ear plates 5021 are driven to move synchronously, and the rack 5022 drives the gear 5023 to drive the rotating shaft 5012 to rotate, thereby driving the shaped frame 5014 to rotate upward, so that the pressing block 5016 rotates synchronously and drives the folding wheel 5013 and the steel strand 9 pressed by the pressing block 5016 on the folding wheel 5013 to rotate upward synchronously, thereby bending the steel strand 9, performing the second level of clamping, bending and fixing the steel strand 9, and then the other end of the steel strand 9 passes through the slide rail 5031 and the control wheel 5044 in sequence from the two clamping blocks 5032 on the right side and is released from the folding wheel 50 13 and the pressing block 5016 are wound around to the outside of the folding wheel 5013, and then the above-mentioned multi-stage clamping and fixing operation is repeated to complete the multi-stage clamping and fixing of the other end of the steel strand 9. The contact area between the steel strand 9 and the folding wheel 5013 can be increased through the second-stage clamping and bending fixation, thereby increasing the friction force. At the same time, the bent steel strand 9 can be constrained by radial and tangential forces. The multi-directional force distribution can more effectively prevent the steel strand 9 from sliding during the stretching process, and the bent steel strand 9 forms a geometric locking effect, so that the position of the steel strand 9 is more fixed.

[0040] Since the steel strand 9 may produce slight bending, twisting or irregular deformation during the production, transportation and storage processes, in order to improve the accuracy of subsequent detection, after the steel strand 9 is clamped and fixed at multiple levels, the control motor 702 is started, and the output shaft of the control motor 702 rotates to drive the rotating frame 703 to rotate slightly, thereby driving the slide rail 5031 on the left to rotate slightly, and then driving the steel strand 9 that has been clamped and fixed at multiple levels to rotate slightly. The initial stress generated by the steel strand 9 during the production, transportation and storage processes can be released through the small twisting, so that the steel strand 9 is in a more uniform state before testing.

[0041] After the stress release is completed, the hydraulic cylinder 4 is started, and the output end of the hydraulic cylinder 4 contracts, driving the fixed sleeve 701 to move to the left, and at the same time driving the support plate 803 and the slider 802 to slide to the left along the guide rail 801, thereby driving the rotating frame 703 to move to the left, and then driving the slide rail 5031 on the left to move to the left, so that the multi-stage clamped and twisted steel strand 9 is pulled to the left. With the continuous contraction of the output end of the hydraulic cylinder 4, the tension received by the steel strand 9 gradually increases. When the steel strand 9 breaks, the tension value of the tension sensor at this time is recorded, which is the maximum tensile strength of the steel strand 9.

[0042] See also Figure 1 , Figure 3 , Figure 8 and Fig. 9 The continuous impact unit 6 also includes a reciprocating component 603, a driving component three 602 for driving the impact component 601 and a gantry 604 fixedly installed on the top of the adjustable test bench 3, the impact component 601 includes a fixed plate 6011 fixedly installed between the front and rear inner walls of the gantry 604 and a return spring 6012 fixedly installed at the bottom of the fixed plate 6011, a ring 6013 is fixedly installed at the bottom end of the return spring 6012, a slide rod 6015 is fixedly installed in the ring 6013, the top end of the slide rod 6015 slides through the fixed plate 6011, an impact wheel 6014 is fixedly installed at the bottom end of the slide rod 6015, and a pressure sensor (not shown in the figure) is arranged on the impact wheel 6014.

[0043] See also Figure 1 , Figure 3 , Figure 8 and Fig. 9 The drive component three 602 includes a mounting sleeve 6021 and a drive motor 6022 fixedly mounted in the mounting sleeve 6021, an eccentric sleeve 6023 is rotatably mounted on the outer side of the output shaft of the drive motor 6022, a connecting rod 6024 hinged to the top of the slide bar 6015 is rotatably mounted on the front side of the eccentric sleeve 6023, a round rod 6025 is fixedly mounted on the front side of the eccentric sleeve 6023, a hinge point between the connecting rod 6024 and the eccentric sleeve 6023 is located on the side of the round rod 6025 away from the output shaft of the drive motor 6022, a toggle sleeve rod 6026 for toggling the round rod 6025 is fixedly mounted on the front end of the output shaft of the drive motor 6022, and the toggle sleeve rod 6026 is located between the eccentric sleeve 6023 and the connecting rod 6024.

[0044] See also Figure 1 , Figure 3 , Figure 4 , Figure 5 , Figure 8 and Fig. 9The reciprocating assembly 603 includes a fixed frame 6031 fixedly installed on the left and right sides of the gantry 604 and a reciprocating screw rod 6032 rotatably installed between the two fixed frames 6031. The outer side of the reciprocating screw rod 6032 is threadedly connected with a reciprocating sleeve 6033, and the mounting sleeve 6021 is fixedly installed at the bottom of the reciprocating sleeve 6033.

[0045] When in use, after the maximum tensile strength test of the steel strand 9 is completed, take another steel strand 9 from the same batch and perform multi-stage clamping and stress release operations on the steel strand 9 in the same manner. After the stress release is completed, control the output end of the hydraulic cylinder 4 to drive the fixing sleeve 701 to move leftward, so that the multi-stage clamped and twisted steel strand 9 is pulled to the left and straightened, and then stop the hydraulic cylinder 4, and then start the drive motor 6022. The output shaft of the drive motor 6022 rotates to drive the toggle sleeve rod 6026 to rotate and toggle the round rod 6025 upward, driving the eccentric sleeve plate 6023 to rotate accordingly, and then driving the top end of the connecting rod 6024 to rotate upward, thereby pulling the sliding rod 6015 to drive the impact wheel 6014 to move upward and compress the reset spring 6012. ( Fig. 9 The figure shows a state diagram when the return spring 6012 is gradually compressed, rather than an initial state diagram). When the toggle sleeve 6026 toggles the round rod 6025 until the round rod 6025 begins to rotate downward, the upward compression force on the return spring 6012 disappears, and the return spring 6012 is reset under the action of the rebound force and gravity. The toggle sleeve 6026 is separated from the round rod 6025, and the impact wheel 6014 moves downward rapidly to impact the steel strand 9. When the toggle sleeve 6026 continues to rotate and toggles the round rod 6025 upward again, the above compression of the return spring 6012 and the return spring 6012 are repeated. The positioning spring 6012 is reset and drives the impact wheel 6014 to impact the steel strand 9. As the output shaft of the drive motor 6022 continues to rotate, the impact wheel 6014 is driven to continuously impact the steel strand 9 until the steel strand 9 breaks. At the same time, as the impact wheel 6014 continues to impact, the number of impacts when the steel strand 9 breaks is recorded. At the same time, the pressure sensor detects the impact force generated during the impact to evaluate the fatigue strength performance of the steel strand 9. Continuous impacts can truly simulate the dynamic loads and impact loads that the steel strand 9 may encounter in actual applications.

[0046] See also Figure 1 , Figure 2 and Figure 3The driving component 202 includes two mounting boxes 2021 fixedly mounted on the top of the body 1 and symmetrically arranged front and back, and the adjustable test bench 3 is located between the two mounting boxes 2021. The adjusting component 201 includes an adjusting sleeve 2011 slidably connected in the mounting box 2021 and a hinged plate 2012 fixedly mounted on the top of the adjusting sleeve 2011 and hinged to the adjustable test bench 3. A mounting seat 2013 located on the right side of the adjustable test bench 3 is fixedly mounted on the top of the body 1, and two hinged rods 2014 symmetrically arranged front and back are hinged on the mounting seat 2013, and the hinged rods 2014 are hinged to the adjustable test bench 3.

[0047] See also Figure 1 , Figure 2 and Figure 3 The driving component 202 also includes a screw 2022 rotatably installed between the left and right inner walls of the installation box 2021, the adjusting sleeve 2011 is threadedly connected to the outside of the screw 2022, and the left end of the front installation box 2021 is fixedly installed with an adjusting motor 2025. The output shaft of the adjusting motor 2025 slides through the front installation box 2021 and is fixedly connected to the screw 2022. The right end of the screw 2022 slides through the installation box 2021 and is fixedly sleeved with a pulley 2023, and a belt 2024 is connected between the two pulleys 2023.

[0048] During specific use, after the steel strand 9 has been tested for tensile strength and fatigue strength performance in a horizontal state, a new steel strand 9 is taken for multi-stage clamping and stress release operations, and then the adjusting motor 2025 is started. The output shaft of the adjusting motor 2025 rotates to drive the front screw 2022 to rotate, thereby driving the front pulley 2023 to rotate. The front pulley 2023 rotates to drive the rear pulley 2023 to rotate through the belt 2024, so that the two screws 2022 rotate synchronously, and then drive the adjusting sleeve 2011 threadedly connected to the screw 2022 to slide to the right, so that the hinge plate 2012 moves to the right and drives the adjustable test bench 3 to squeeze the hinged joint of the hinged rod 2014 and the adjustable test bench 3. Due to the height of the hinged joint of the adjustable test bench 3 and the hinged plate 2012 It should be lower than the height of the hinged joint between the hinged rod 2014 and the adjustable test bench 3. Therefore, as the adjustable test bench 3 moves to the right, the hinged rod 2014 and the adjustable test bench 3 will rotate, lift up the adjustable test bench 3, and then drive the adjustable test bench 3 to tilt, and then drive the steel strand 9 to tilt, and then stop adjusting the motor 2025, and test the tensile strength and fatigue strength performance of the steel strand 9 in the tilted state. By testing the tensile strength and fatigue strength performance in the tilted state, the maximum bearing capacity of the steel strand 9 at different tilt angles can be evaluated, which helps to understand the tensile strength performance of the steel strand 9 under different working conditions that may be encountered in actual engineering applications (such as bridges, cranes, etc., where the steel strand 9 may be in a tilted state), and thus make the test results more representative. It should be noted that when the hinged plate 2012 just starts to move to the right, the right end of the adjustable test bench 3 can also be lifted manually to make the adjustable test bench 3 tilt smoothly.

[0049] Finally, it should be noted that: Obviously, the above embodiments are only examples for clearly explaining the present invention, and are not intended to limit the implementation methods. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from this are still within the scope of protection of the present invention.

Claims

1. A prestressed steel strand performance testing device, characterized in that: include: A machine body (1) and an adjustable test bench (3) mounted on the top of the machine body (1) via an inclination adjustment unit (2); a hydraulic cylinder (4) is fixedly mounted on the top of the adjustable test bench (3); a torsion unit (7) is arranged at the output end of the hydraulic cylinder (4); a continuous impact unit (6), a guide unit (8) and two left-right symmetrical multi-stage clamping units (5) are also arranged on the top of the adjustable test bench (3); the multi-stage clamping units (5) include a primary bending clamping component (501), a bending control component (502), a secondary circumferential clamping component (503), a toggle control component (504) and a second driving component (505) for driving the bending control component (502) and the toggle control component (504); the continuous impact unit (6) includes an impact component (601); and the inclination adjustment unit (2) includes an adjustment component (201) and a first driving component (202) for driving the adjustment component (201); The driving component 1 (202) comprises two mounting boxes (2021) fixedly mounted on the top of the machine body (1) and symmetrically arranged front and back, the adjustable test bench (3) is located between the two mounting boxes (2021), the adjusting component (201) comprises an adjusting sleeve (211) slidably connected in the mounting box (2021) and a hinged plate (212) fixedly mounted on the top of the adjusting sleeve (2011) and hingedly connected to the adjustable test bench (3), a mounting seat (2013) located on the right side of the adjustable test bench (3) is fixedly mounted on the top of the machine body (1), two hinged rods (2014) symmetrically arranged front and back are hingedly connected to the mounting seat (2013), and the hinged rods (2014) are hingedly connected to the adjustable test bench (3); After the tensile strength and fatigue strength tests of the steel strand (9) are carried out when the adjustable test bench (3) is in a horizontal state, the drive component 1 (202) drives the adjustment sleeve (2011) to slide to the right so that the adjustable test bench (3) drives the steel strand (9) to tilt, and then the tensile strength and fatigue strength tests of the steel strand (9) are carried out in the tilted state.

2. A prestressed steel strand performance testing device according to claim 1, characterized in that: The driving component 1 (202) further comprises a screw rod (2022) rotatably mounted between the left and right inner walls of the installation box (2021); the adjusting sleeve (2011) is threadedly connected to the outside of the screw rod (2022); an adjusting motor (2025) is fixedly mounted on the left side of the front installation box (2021); the output shaft of the adjusting motor (2025) slides through the front installation box (2021) and is fixedly connected to the screw rod (2022); the right end of the screw rod (2022) slides through the installation box (2021) and is fixedly sleeved with a pulley (223); a belt (224) is transmission-connected between the two pulleys (2023).

3. The prestressed steel strand performance testing device according to claim 1 is characterized in that: The first-level bending and clamping assembly (501) includes two L-shaped plates (5011) that are symmetric front and back, and a rotating shaft (5012) rotatably installed between the two L-shaped plates (5011). A folding line wheel (5013) and a C-shaped frame (5014) are fixedly installed on the outer side of the rotating shaft (5012). The folding line wheel (5013) is located inside the C-shaped frame (5014), and the folding line wheel (5013) is coaxial with the rotating shaft (5012). A first small cylinder (5015) is fixedly installed at the top of the C-shaped frame (5014), and a pressing block (5016) that cooperates with the folding line wheel (5013) is fixedly installed at the output end of the first small cylinder (5015).

4. A prestressed steel strand performance testing device according to claim 3, characterized in that: The bending control assembly (502) includes two ear plates (5021) that are symmetric front and back and are located on the side of the rotating shaft (5012) close to the center of the adjustable test bench (3), and a rack (5022) fixedly installed on the side of the ear plate (5021) close to the rotating shaft (5012). Both ends of the rotating shaft (5012) penetrate through the L-shaped plate (5011) and are fixedly sleeved with gears (5023) that mesh with the rack (5022).

5. The prestressed steel strand performance testing device according to claim 4, characterized in that: The second-level circumferential clamping assembly (503) includes a slide rail (5031) fixedly installed between the two L-shaped plates (5011) and on the side of the L-shaped plate (5011) away from the rotating shaft (5012), and the slide rail (5031) is located on the side of the ear plate (5021) away from the corresponding rotating shaft (5012). Two clamping blocks (5032) that are symmetric front and back and are used for clamping the steel strand (9) are slidably connected in the slide rail (5031).

6. The prestressed steel strand performance testing device according to claim 5, characterized in that: The拨动控制组件(504)包括外侧开设有控制槽的控制轮(5044)、固定安装在滑轨(5031)远离夹持块(5032)一侧并前后对称的两对安装板(5041),同一对安装板(5041)之间固定安装有安装轴(5042),安装轴(5042)外侧转动安装有拨动块(5043),滑轨(5031)远离夹持块(5032)一侧开设有前后对称的两个拨动槽(5045),拨动块(5043)呈L形状,且拨动块(5043)两端分别延伸至控制槽和对应的拨动槽(5045)内,所述滑轨(5031)远离夹持块(5032)一侧开设有位于两个拨动槽(5045)之间且位于控制轮(5044)上方的容纳槽,驱动组件二(505)包括固定安装在容纳槽内的小型气缸二(5051),小型气缸二(5051)的输出端固定安装有移动板(5052),移动板(5052)和耳板(5021)均固定安装在控制轮(5044)的外侧,滑轨(5031)中部和控制轮(5044)圆心处均开设有供钢绞线(9)穿过的穿线孔,且两个穿线孔同心,移动板(5052)位于拨动块(5043)靠近对应转动轴(5012)的一侧。 It should be noted that there is an unclear part in the original text of . I have translated it as accurately as possible based on the context, but it may need to be adjusted according to the specific meaning. The part "拨动控制组件(504)" in the original text seems to be a misspelling or an unclear expression. It should be something like "The拨动控制组件(504)" which is not a proper name. You can check and correct it for a more accurate translation.

7. The prestressed steel strand performance testing device according to claim 1, characterized in that: The continuous impact unit (6) further comprises a reciprocating component (603), a driving component three (602) for driving the impact component (601), and a gantry (604) fixedly mounted on the top of the adjustable test bench (3); the impact component (601) comprises a fixing plate (6011) fixedly mounted between the front and rear inner walls of the gantry (604) and a return spring (6012) fixedly mounted on the bottom of the fixing plate (6011); a circular ring (6013) is fixedly mounted on the bottom end of the return spring (6012); a sliding rod (6015) is fixedly mounted inside the circular ring (6013); the top end of the sliding rod (6015) slides through the fixing plate (6011); and an impact wheel (6014) is fixedly mounted on the bottom end of the sliding rod (6015).

8. The prestressed steel strand performance testing device according to claim 7, characterized in that: The driving component three (602) comprises a mounting sleeve (6021) and a driving motor (6022) fixedly mounted in the mounting sleeve (6021); an eccentric sleeve (6023) is rotatably mounted on the outer side of the output shaft of the driving motor (6022); a connecting rod (6024) hinged to the top of the sliding rod (6015) is rotatably mounted on the front side of the eccentric sleeve (6023); a round rod (6025) is fixedly mounted on the front side of the eccentric sleeve (6023); a hinge point between the connecting rod (6024) and the eccentric sleeve (6023) is located on a side of the round rod (6025 away from the output shaft of the driving motor (6022); a toggle sleeve rod (6026) for toggling the round rod (6025) is provided on the fixed sleeve at the front end of the output shaft of the driving motor (6022); and the toggle sleeve rod (6026) is located between the eccentric sleeve (6023) and the connecting rod (6024).

9. The prestressed steel strand performance testing device according to claim 8, characterized in that: The reciprocating assembly (603) comprises a fixing frame (6031) fixedly mounted on the left and right sides of the gantry (604) and a reciprocating screw rod (6032) rotatably mounted between the two fixing frames (6031); a reciprocating sleeve (6033) is threadedly connected to the outer side of the reciprocating screw rod (6032); and a mounting sleeve (6021) is fixedly mounted on the bottom of the reciprocating sleeve (6033).

10. The prestressed steel strand performance testing device according to claim 5, characterized in that: The twisting unit (7) comprises a fixed sleeve (701) fixedly mounted on the output end of the hydraulic cylinder (4) and a rotating frame (703) rotatably mounted on the right side of the fixed sleeve (701); the rotating frame (703) is fixedly connected to the left slide rail (5031); the right slide rail (5031) is fixedly mounted on the top of the adjustable test bench (3); a control motor (702) is fixedly mounted in the fixed sleeve (701); the output shaft of the control motor (702) is fixedly connected to the rotating frame (703); the guide unit (8) comprises two guide rails (801) fixedly mounted on the top of the adjustable test bench (3) and symmetrically arranged front and back, and a slider (802) slidably connected to the top of the guide rails (801); a support plate (803) fixedly mounted on the top of the slider (802) and fixedly connected to the fixed sleeve (701).

Images