Open type tension machine for ground beam

Abstract

The application discloses a ground beam open type tension machine and relates to the technical field of tension machines, which comprises a girder, positioning holes are uniformly arranged on the girder, a rear trolley is arranged above the right side of the girder, and a walking mechanism is installed on the rear trolley to realize the adjustment of the left and right positions of the rear trolley. The cooperation of the traction mechanism and the locking mechanism makes the clamping of the workpiece convenient and safe, and the locking can be released by preventing misoperation, specifically, the lifting and limiting of the oval pin and the stretching and contraction of the limiting plate 1008 are controlled through the fourth hydraulic rod, the chain, the second gear and the second guide gear, in the testing state, the pressure of the workpiece on the arc-shaped plate will reversely lock the internal mechanism, even if the hydraulic rod is misoperated, the locking cannot be released, while providing the convenient one-key clamping, an important safety line is constructed, the workpiece is prevented from loosening due to human errors in the testing process, serious safety accidents are prevented, and the safety of detection is ensured.

Description

Technical Field

[0001] This invention relates to the field of tensile testing machine technology, specifically to an open-type tensile testing machine for ground beams. Background Technology

[0002] In the fields of industrial manufacturing and engineering safety, the performance testing of load-bearing components such as wire ropes, lifting slings, and lifting beams is crucial and directly relates to life and property safety. Traditional tensile testing machines generally have the following problems, which limit their testing efficiency, accuracy, and application scope. 1. Traditional equipment usually adopts a closed or elevated structure, and its beams and frames severely encroach on the space of the testing area. This makes it extremely difficult, or even impossible, to test some large and irregularly shaped (irregular) workpieces, which greatly limits the versatility of the equipment. 2. The existing rear trolley movement and positioning often rely on external cranes and other lifting equipment for hoisting, which is not only cumbersome to operate and inaccurate in positioning, but also significantly increases equipment investment and operating costs. 3. The workpiece clamping and trolley fixing often use simple vertical pins or bolts. When subjected to huge tensile forces, especially during fracture tests, this structure is prone to loosening due to impact and vibration, posing a safety hazard. Furthermore, the clamping process is labor-intensive and inefficient. 4. The sensor's mounting structure has significant static friction, which makes force transmission insensitive and prevents the accurate capture of minute force changes, thus affecting the accuracy and reliability of the final test data. Summary of the Invention

[0003] The purpose of this invention is to provide an open-type tensile testing machine for ground beams to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: an open-type tensile testing machine with a ground beam, comprising a main beam with uniformly spaced positioning holes, a rear trolley positioned on the upper right side of the main beam, a traveling mechanism mounted on the rear trolley for adjusting its left and right positions, a square pin positioning mechanism fixed on the rear trolley for locking its position, a pre-tensioning mechanism symmetrically fixed on the rear trolley for pre-tensioning the workpiece to be tested, a right fixed frame fixed on the rear trolley, and a left fixed frame positioned on the upper left side of the main beam, both the right and left fixed frames being equipped with traction mechanisms, which are connected to a locking mechanism for locking and self-locking the workpiece to prevent it from loosening during testing. A testing mechanism for workpiece testing is also mounted on the left fixed frame.

[0005] Preferably, the walking mechanism includes a first hydraulic rod rotatably connected to the rear trolley, with the output end of the first hydraulic rod connected to the central rotating shaft of the folding frame. The upper end of the folding frame is rotatably connected to the rear trolley, and the lower end of the folding frame is connected to a walking wheel via a bearing. The walking wheel is connected to a reducer fixed to the folding frame, and the reducer is connected to a motor. The walking wheel is rolled on a guide rail, which is symmetrically fixed to a beam. The extension of the first hydraulic rod can drive the folding frame to unfold or fold, thereby adjusting the distance between the walking wheel and the rear trolley, and consequently adjusting the height of the rear trolley. This, combined with the motor drive, allows the rear trolley to move left and right, ensuring the normal operation of the device.

[0006] Preferably, the square pin positioning mechanism includes a second hydraulic rod fixed on the rear carriage, and the output end of the second hydraulic rod is connected to a rotatable first gear. The first gear is connected to a first chain, and one end of the first chain is fixed to the rear carriage. The first chain is connected to a first guide gear on the rear carriage and is also connected to a bearing. The other end of the first chain is fixed to the positioning square pin, and the width of the positioning square pin is smaller than the width of the positioning hole. Simultaneously, rollers are symmetrically arranged on the side of the positioning square pin, and the rollers are connected to the rear carriage with bearings. The distance between the two rollers is equal to the width of the positioning hole. The second hydraulic rod drives the first gear to move, which, in conjunction with the action of the first chain and the first guide gear, drives the positioning square pin to move, thereby realizing the insertion and separation of the positioning square pin and the positioning hole. This provides a basic guarantee for locking the rear carriage. Furthermore, by limiting the width of the positioning square pin, the convenience of insertion and separation between the positioning square pin and the positioning hole can be improved, and a basic guarantee can be provided for the pre-tensioning of the subsequent workpiece.

[0007] Preferably, the pre-tensioning mechanism includes a third hydraulic rod fixed on the rear trolley, and a mounting block is fixed to the output end of the third hydraulic rod. Rotatable claws are symmetrically connected to the mounting block, and a torsion spring is fixed between the claws and the mounting block. The claws are engaged with the positioning holes. The third hydraulic rod drives the claws to move and engage with the positioning holes, which can achieve a locking effect. With the continued extension of the third hydraulic rod, it can provide a basic guarantee for the pre-tensioning of the workpiece.

[0008] Preferably, the traction mechanism includes a support frame fixed on the right fixed frame and the left fixed frame, and a fourth hydraulic rod is fixed on the support frame. The output end of the fourth hydraulic rod is connected to a second gear by a bearing. The second gear is connected to a second chain. The second chain is connected to a second guide gear connected to the support frame by a bearing. One end of the second chain is fixed to the support frame, and the other end of the second chain is connected to the locking mechanism. Through the above structure, a basic force can be provided to realize the lifting and lowering of the locking mechanism, thereby providing a basic guarantee for locking and unlocking both ends of the workpiece.

[0009] Preferably, the locking mechanism includes an elliptical pin that is nested with the right fixed frame and the left fixed frame, and convex shafts are symmetrically fixed on the elliptical pin. The convex shafts contact the right fixed frame and the left fixed frame to achieve a limiting function. Through the positioning function of the convex shafts, the position of the elliptical pin can be limited to ensure the normal operation of the device.

[0010] Preferably, a movable plate is slidably connected inside the elliptical pin, and a spring is fixed between the movable plate and the elliptical pin. A vertical rod is fixed on the movable plate, and the vertical rod is fixed to the second chain. A fixing rod is fixed at the lower end of the movable plate, and one end of the fixing rod is rotatably connected to the connecting rod. The other end of the connecting rod is rotatably connected to the limiting plate, and the limiting plate is slidably connected to the elliptical pin. The limiting plate contacts the lower end face of the right fixed frame and the lower end face of the left fixed frame to achieve positioning. Through the elastic action of the spring, a basic force can be provided for the automatic reset of the movable plate. Combined with the transmission action of the connecting rod, a basic guarantee can be provided for the movement of the limiting plate, thereby providing a basic guarantee for the self-locking fixation of the elliptical pin, and thus effectively ensuring the safety of the inspection.

[0011] Preferably, a round shaft is slidably connected in the inclined groove of the limiting plate, and the round shaft is fixed on the movable frame. The movable frame and the elliptical pin are slidably connected. At the same time, an arc plate is fixed on the movable frame, and the arc plate and the elliptical pin are nested together. Through the sliding action between the round shaft and the inclined groove on the limiting plate, a basic force can be provided for the movement of the movable frame and the arc plate, ensuring the normal operation of the device.

[0012] Preferably, the detection mechanism includes a front trolley disposed inside the left fixed frame, with needle rollers installed on both the top and bottom of the front trolley. The needle rollers contact the left fixed frame and roll, thereby effectively reducing the friction between the front trolley and the left fixed frame and ensuring the accuracy of the detection data.

[0013] Preferably, the front trolley is also symmetrically fixed with positioning plates on both sides, and the positioning plates contact the left fixed frame to achieve positioning. The front trolley is also symmetrically fixed with guide plates on both sides, and the guide plates are slidably connected to the left fixed frame. A pressure sensor is fixed between the left guide plate and the left fixed frame, and the right guide plate is fixed to the output end of the fifth hydraulic rod. The fifth hydraulic rod is fixed to the fixed seat, and the fixed seat is fixed to the main beam. When the front trolley moves relative to the left fixed frame, the sliding guidance between the guide plates and the left fixed frame can ensure the stability of the front trolley's movement. The pressure sensor can detect the magnitude of the tensile force on the workpiece, and the positioning effect of the positioning plates contacting the left fixed frame can provide protection in case of workpiece breakage, effectively avoiding damage to the device and ensuring the service life of the device.

[0014] Compared with the prior art, the beneficial effects of the present invention are: 1. This ground beam open tensile testing machine, by adding a walking mechanism, in actual use, controls the unfolding and retraction of the folding frame through the first hydraulic rod to realize the overall lifting of the trolley. After lifting, the walking wheels are driven by motor 4 to move precisely on the guide rail. The operator can remotely control the trolley to accurately position it. The operation is extremely simple and labor-saving, which greatly improves the efficiency of test preparation and reduces the cost and risk caused by the use of large auxiliary equipment. 2. This open-type tensile testing machine for ground beams achieves double-safety fixing of the rear trolley through the coordinated action of the square pin positioning mechanism and the pre-tensioning mechanism. Specifically, the square pin positioning mechanism inserts the positioning square pin into the positioning hole through the second hydraulic rod 501 and chain drive to complete the first fixing. Subsequently, the third hydraulic rod of the pre-tensioning mechanism pushes the claw to engage with the front positioning hole. While tightening the workpiece, it pushes the rear trolley to move, forcing the positioning square pin to become obliquely inserted under the action of the roller, forming a self-locking effect that tightens as it is pulled, thereby greatly enhancing the stability and safety of the rear trolley when subjected to huge tensile forces, effectively resisting impact and vibration, and eliminating the risk of accidental loosening. 3. The ground beam open tensile testing machine adopts a unique low-friction structure for the front trolley sensor section. That is, the front trolley contacts the left fixed frame 8 through the roller needle, which transforms sliding friction into rolling friction, thereby greatly reducing motion resistance. This allows the tensile force borne by the workpiece to be transmitted to the pressure sensor with almost no loss. Even very small force changes can be accurately captured, thus ensuring the authenticity and reliability of the final test data and ensuring high accuracy of force measurement. 4. This open-type tensile testing machine with ground beam features a traction mechanism and a locking mechanism that make workpiece clamping both convenient and safe. It also has a function to prevent accidental unlocking. Specifically, the lifting and lowering of the elliptical pin and the extension and retraction of the limit plate 1008 are controlled by the fourth hydraulic rod, chain, second gear, and second guide gear. In the testing state, the pressure of the workpiece on the arc plate will reverse and lock the internal mechanism. Even if the hydraulic rod is accidentally operated, it cannot unlock. This design provides convenient one-button clamping while constructing an important safety barrier to prevent workpiece loosening due to human error during testing, thus ensuring the safety of the testing. Attached Figure Description

[0015] Figure 1 This is a frontal three-dimensional structural diagram of the device of the present invention; Figure 2 This is a top-view three-dimensional structural diagram of the rear trolley of the present invention; Figure 3 This is a three-dimensional structural diagram of the walking mechanism of the present invention; Figure 4 This is a three-dimensional structural diagram of the square pin positioning mechanism of the present invention; Figure 5 This is a three-dimensional structural diagram of the pre-tensioning mechanism of the present invention; Figure 6 This is a three-dimensional structural diagram of the traction mechanism of the present invention; Figure 7 This is a side view of the three-dimensional structure of the elliptical pin of the present invention; Figure 8 This is a three-dimensional structural diagram of the elliptical pin in frontal cross-section of the present invention; Figure 9 This is a side-view perspective of the three-dimensional structure of the left fixing frame of the present invention; Figure 10 This is a schematic diagram of the three-dimensional structure formed by the left fixing frame and the front trolley of the present invention; Figure 11 This is a schematic diagram of the three-dimensional structure of the front carriage and the needle roller of the present invention.

[0016] In the diagram: 1. Main beam; 2. Positioning hole; 3. Rear trolley; 4. Traveling mechanism; 401. First hydraulic rod; 402. Folding frame; 403. Reducer; 404. Motor; 405. Traveling wheel; 406. Guide rail; 5. Square pin positioning mechanism; 501. Second hydraulic rod; 502. First gear; 503. First chain; 504. First guide gear; 505. Positioning square pin; 506. Roller; 6. Pre-tensioning mechanism; 601. Third hydraulic rod; 602. Mounting block; 603. Claw; 7. Right fixed frame; 8. Left fixed frame; 9. Traction mechanism; 901. Support frame; 902. Fourth hydraulic rod 903. Pressure rod; 904. Second gear; 905. Second chain; 906. Second guide gear; 10. Locking mechanism; 1007. Elliptical pin; 1008. Convex shaft; 1009. Movable plate; 10000. Spring; 10001. Vertical rod; 1001. Fixed rod; 1002. Connecting rod; 1003. Limiting plate; 1004. Round shaft; 1015. Movable frame; 1016. Arc plate; 11. Detection mechanism; 1101. Front trolley; 1102. Needle roller; 1103. Positioning plate; 1104. Guide plate; 1105. Pressure sensor; 1106. Fifth hydraulic rod; 1107. Fixed seat. Detailed Implementation

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

[0018] Please see Figures 1-11 This invention provides a technical solution: an open-type tensile testing machine with a ground beam, including a main beam 1, with positioning holes 2 evenly distributed on the main beam 1, a rear trolley 3 arranged on the upper right side of the main beam 1, a traveling mechanism 4 installed on the rear trolley 3 for adjusting the left and right positions of the rear trolley 3, a square pin positioning mechanism 5 fixed on the rear trolley 3 for locking the position of the rear trolley 3, a pre-tensioning mechanism 6 symmetrically fixed on the rear trolley 3 for pre-tensioning the workpiece to be tested, a right fixed frame 7 fixed on the rear trolley 3, and a left fixed frame 8 arranged on the upper left side of the main beam 1. A traction mechanism 9 is installed on both the right fixed frame 7 and the left fixed frame 8, and the traction mechanism 9 is connected to a locking mechanism 10. The locking mechanism 10 is used to lock and self-lock the workpiece to prevent the workpiece from loosening during the testing process. A testing mechanism 11 for workpiece testing is also installed on the left fixed frame 8.

[0019] The walking mechanism 4 includes a first hydraulic rod 401 rotatably connected to the rear trolley 3, and the output end of the first hydraulic rod 401 is connected to the central rotating shaft of the folding frame 402. The upper end of the folding frame 402 is rotatably connected to the rear trolley 3. Meanwhile, the lower end of the folding frame 402 is connected to a walking wheel 405 by a bearing. The walking wheel 405 is connected to a reducer 403 fixed on the folding frame 402. The reducer 403 is connected to a motor 404. The walking wheel 405 is rolled on a guide rail 406. The guide rail 406 is symmetrically fixed on the main beam 1. When using this open-type tensile testing machine for ground beams, such as Figures 1-5 As shown, the main beam 1 is first nested with the ground so that the upper surface of the main beam 1 is flush with the ground. When installing the test workpiece (such as a wire rope, sling, etc.), the distance between the locking mechanism 10 on the right fixed frame 7 and the locking mechanism 10 on the left fixed frame 8 is adjusted according to the length of the workpiece. At this time, it is only necessary to control the extension of the first hydraulic rod 401, so that the folding frame 402 is unfolded by force. Through the unfolding of the folding frame 402, the distance between the traveling wheel 405 and the rear trolley 3 increases, so that the rear trolley 3 is raised and disengaged from the main beam 1. At this time, the claw 603 separates from the positioning hole 2, which facilitates the locking mechanism on the right fixed frame 7 and the rear trolley 3. After the position adjustment of the 10, the rear trolley 3 is raised and disengaged from the main beam 1. By starting the motor 404 and cooperating with the transmission action of the reducer 403, the traveling wheel 405 can move on the guide rail 406, thereby realizing the position adjustment of the locking mechanism 10 on the right fixed frame 7. This, in turn, realizes the distance adjustment between the locking mechanism 10 on the right fixed frame 7 and the locking mechanism 10 on the left fixed frame 8, ensuring that the distance between the locking mechanism 10 on the right fixed frame 7 and the locking mechanism 10 on the left fixed frame 8 is less than the length of the workpiece, so as to facilitate the subsequent installation and fixation of the workpiece. After the adjustment is completed, the first hydraulic rod 401 is controlled to retract, so that the rear trolley 3 and the chuck 603 are reset. The square pin positioning mechanism 5 includes a second hydraulic rod 501 fixed on the rear carriage 3, and the output end of the second hydraulic rod 501 is connected to a rotatable first gear 502. The first gear 502 is connected to the first chain 503. At the same time, one end of the first chain 503 is fixed to the rear carriage 3. The first chain 503 is connected to the first guide gear 504, which is connected to the rear carriage 3 by a bearing. The other end of the first chain 503 is fixed to the positioning square pin 505. The width of the positioning square pin 505 is smaller than the width of the positioning hole 2. At the same time, rollers 506 are symmetrically arranged on the side of the positioning square pin 505. The rollers 506 are connected to the rear carriage 3 by bearings. The distance between the two rollers 506 is equal to the width of the positioning hole 2. After the position of the rear trolley 3 is adjusted, the positioning pin 505 is aligned with the upper part of the positioning hole 2. At this time, it is only necessary to control the retraction of the second hydraulic rod 501. With the action of the first gear 502, the first guide gear 504 and the first chain 503, the positioning pin 505 will automatically fall under the action of gravity and engage with the positioning hole 2. Since the width of the positioning pin 505 is smaller than the width of the positioning hole 2, it is easier to engage the positioning pin 505 with the positioning hole 2. Through the engagement between the positioning pin 505 and the positioning hole 2, the position of the rear trolley 3 can be locked once. The traction mechanism 9 includes a support frame 901 fixed on the right fixed frame 7 and the left fixed frame 8. A fourth hydraulic rod 902 is fixed on the support frame 901, and a second gear 903 is connected to the output end of the fourth hydraulic rod 902 via a bearing. The second gear 903 is connected to a second chain 904, and the second chain 904 is connected to a second guide gear 905 connected to the support frame 901 via a bearing. One end of the second chain 904 is fixed to the support frame 901, and the other end is connected to the locking mechanism 10. The locking mechanism 10 includes an elliptical pin 1001 nested with the right fixed frame 7 and the left fixed frame 8. A convex shaft 1002 is symmetrically fixed on the elliptical pin 1001, and the convex shaft 1002 contacts the right fixed frame 7 and the left fixed frame 8 to achieve a limiting function. A movable plate 1003 is slidably connected inside the elliptical pin 1001, and the movable plate 1003 is connected to the elliptical pin 1001 via a bearing. A spring 1004 is fixed between the round pins 1001, and a vertical rod 1005 is fixed on the movable plate 1003. The vertical rod 1005 is also fixed to the second chain 904. A fixing rod 1006 is fixed to the lower end of the movable plate 1003, and one end of the fixing rod 1006 is rotatably connected to the connecting rod 1007. The other end of the connecting rod 1007 is rotatably connected to the limiting plate 1008. The limiting plate 1008 is also connected to the elliptical pins 1001. For sliding connection, the limiting plate 1008 contacts the lower end face of the right fixed frame 7 and the lower end face of the left fixed frame 8 to achieve positioning function; a round shaft 1009 is slidably connected in the inclined groove on the limiting plate 1008, and the round shaft 1009 is fixed on the movable frame 1010, and the movable frame 1010 is slidably connected to the elliptical pin 1001. At the same time, an arc plate 1011 is fixed on the movable frame 1010, and the arc plate 1011 and the elliptical pin 1001 are nested together. After the positioning pin 505 is inserted into the positioning hole 2, as follows: Figures 1-8As shown (taking the locking mechanism 10 on the right-side pre-fixed bracket 7 of the workpiece as an example), firstly, the fourth hydraulic rod 902 extends, thereby driving the second gear 903 to move upward. With the combined action of the second gear 903, the second chain 904, and the second guide gear 905, the connection end of the second chain 904 and the vertical rod 1005 can be forced upward. At this time, under the action of the weight of the elliptical pin 1001, the vertical rod 1005 moves upward relative to the elliptical pin 1001, thereby driving the movable plate 1003 to move upward. At this time, the spring 1004 is forced to contract. When the movable plate 1003 moves upward, it simultaneously drives the fixed rod 1006 to move upward. With the transmission action of the connecting rod 1007, the limiting plate 1008 is forced towards the elliptical pin 1005. When the elastic force of the spring 1004 is equal to the weight of the elliptical pin 1001, the limiting plate 1008 fully retracts into the elliptical pin 1001. At this time, the second chain 904 continues to drive the vertical rod 1005 upward, which can simultaneously drive the elliptical pin 1001 upward, thereby separating the elliptical pin 1001 from the lower insertion hole of the right fixed frame 7. Then, the right end connecting sleeve of the workpiece is placed on the right fixed frame 7. By controlling the retraction of the fourth hydraulic rod 902, the vertical rod 1005 and the elliptical pin 1001 can automatically move downward under their own weight. Through the action of the elliptical pin 1001, it can penetrate the right end connecting sleeve of the workpiece, realizing the positioning function of the right end connecting sleeve of the workpiece. At this time, the arc plate 1011 is located on the right side of the workpiece. The end connecting sleeve is located inside the sleeve. During the downward movement of the elliptical pin 1001, when the convex shaft 1002 contacts the right fixed frame 7, the elliptical pin 1001 can be positioned. At this time, the limiting plate 1008 is located below the lower side plate of the right fixed frame 7. At this time, the fourth hydraulic rod 902 continues to retract, causing the vertical rod 1005 to move downward relative to the elliptical pin 1001 under the elastic action of the spring 1004. According to the above principle, during the downward movement of the vertical rod 1005, which drives the fixed rod 1006 to move downward, the transmission action of the connecting rod 1007 causes the limiting plate 1008 to be forced to extend outward from the elliptical pin 1001, thereby realizing the self-locking effect of the elliptical pin 1001. During the movement of the limiting plate 1008, the round shaft 1009 and the limiting plate 1008 are engaged. The sliding action between the inclined grooves on plate 08 allows the movable frame 1010 and the arc plate 1011 to move under force, causing the arc plate 1011 to nest with the elliptical pin 1001. Based on this principle, the left connecting sleeve of the workpiece can be connected to the locking mechanism 10 on the left fixed frame 8, thereby realizing the installation of the workpiece. During subsequent testing, when the workpiece undergoes a tensile test, the workpiece connecting sleeve contacts the arc plate 1011, generating pressure that prevents the arc plate 1011 from moving outward. Even if the worker mistakenly extends the fourth hydraulic rod 902 during the testing process, the position of the arc plate 1011 is locked by the workpiece connecting sleeve, preventing the vertical rod 1005 from moving relative to the elliptical pin 1001.Therefore, the locking effect between the limiting plate 1008 and the right fixed bracket 7 or the left fixed bracket 8 cannot be released, and consequently, the locking effect at both ends of the workpiece cannot be released, effectively ensuring inspection safety; The pre-tensioning mechanism 6 includes a third hydraulic rod 601 fixed on the rear trolley 3, and a mounting block 602 is fixed to the output end of the third hydraulic rod 601. Rotatable claws 603 are symmetrically connected to the mounting block 602. At the same time, a torsion spring is fixed between the claws 603 and the mounting block 602. The claws 603 and the positioning hole 2 are engaged. After the two ends of the workpiece are fixed, as follows Figures 1-8 As shown, because the distance between the locking mechanism 10 on the right fixed frame 7 and the locking mechanism 10 on the left fixed frame 8 is less than the length of the workpiece, the workpiece is in a relatively relaxed state. When the first hydraulic rod 401 retracts and drives the trolley 3 and the chuck 603 to reset, when the chuck 603 is not engaged with the positioning hole 2, the chuck 603 is in contact with the main beam 1. By controlling the extension of the third hydraulic rod 601, the mounting block 602 and the chuck 603 can be moved. At this time, the chuck 603 and the main beam 1 are in a sliding connection. When the chuck 603 slides to engage with the positioning hole 2, the gravity of the chuck 603 and the elasticity of the torsion spring can reset the chuck 603. Figure 6 As shown, by extending the third hydraulic rod 601, the chuck 603 can engage with the edge of the positioning hole 2 to achieve positioning. At this time, the third hydraulic rod 601 continues to extend, and because the chuck 603 engages with the positioning hole 2, the rear trolley 3 is moved under force. Simultaneously, the roller 506 moves backward. When the roller 506 contacts the positioning pin 505, the roller 506 applies a force to the positioning pin 505, causing the positioning pin 505 to tilt under force until the positioning pin 505 contacts both the roller 506 and the edge of the positioning hole 2, thus achieving secondary positioning of the rear trolley 3. Figure 4 As shown, to ensure the stability of the rear trolley 3, the positioning pin 505 is in an inclined state. Through the inclined locking effect of the positioning pin 505, the displacement risk of the positioning pin 505 under load can be effectively reduced, thereby improving the overturning resistance and stability of the overall structure. Furthermore, the movement of the rear trolley 3 can generate a certain pulling force on the slack workpiece, so that the slack workpiece is further tightened, thereby achieving the pre-tightening effect of the workpiece (here, pre-tightening is relative tightening, and it is not necessary to ensure that the workpiece is in a taut state). The detection mechanism 11 includes a front trolley 1101 located inside the left fixed frame 8, with needle rollers 1102 installed on both the top and bottom of the front trolley 1101, and the needle rollers 1102 rolling in contact with the left fixed frame 8; positioning plates 1103 are also symmetrically fixed on the front trolley 1101, and the positioning plates 1103 contact the left fixed frame 8 to achieve positioning; guide plates 1104 are also symmetrically fixed on the front trolley 1101, and the guide plates 1104 are slidably connected to the left fixed frame 8; a pressure sensor 1105 is fixed between the left guide plate 1104 and the left fixed frame 8; at the same time, the right guide plate 1104 is fixed to the output end of the fifth hydraulic rod 1106, the fifth hydraulic rod 1106 is fixed to the fixed seat 1107, and the fixed seat 1107 is fixed on the beam 1; After the rear trolley 3 is completely locked, as Figures 1-11 As shown, during testing, by controlling the extension of the fifth hydraulic rod 1106, the guide plate 1104 and the front carriage 1101 can be moved under force, thereby synchronously moving the left fixed frame 8, the locking mechanism 10 on the left fixed frame 8, and the left end of the workpiece. When the workpiece is taut, the position of the left fixed frame 8 is limited. By continuing to extend the fifth hydraulic rod 1106, the front carriage 1101 can be moved relative to the left fixed frame 8 under force. Combined with the sliding guiding effect between the guide plate 1104 and the left fixed frame 8, the front carriage 1101 can be kept in place. The stability of the movement, combined with the rolling action between the needle roller 1102 and the left fixed frame 8, can effectively reduce the friction between the front carriage 1101 and the left fixed frame 8, thereby ensuring the accuracy of the detection data. Furthermore, the pressure sensor 1105 can detect the tension under the workpiece, thereby realizing the detection function of the workpiece. When the workpiece breaks, the positioning plate 1103 contacts the left fixed frame 8 to achieve the positioning function, which can limit the movement range of the front carriage 1101, avoid damage to the device caused by the instant of workpiece breakage, and ensure the service life of the device.

[0020] It should be noted that, in this document, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0021] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only for the purpose of helping to understand the method and core ideas of the present invention. The above descriptions are only preferred embodiments of the present invention. It should be noted that due to the limitations of textual expression, and the objective existence of infinite specific structures, those skilled in the art can make several improvements, modifications, or changes without departing from the principles of the present invention, and can also combine the above technical features in an appropriate manner. These improvements, modifications, changes, or combinations, or the direct application of the inventive concept and technical solution to other situations without modification, should all be considered within the scope of protection of the present invention.

Claims

1. A ground beam open tension testing machine, comprising a main beam (1), characterized in that: The main beam (1) is provided with evenly spaced positioning holes (2). A rear trolley (3) is provided on the upper right side of the main beam (1). A traveling mechanism (4) is installed on the rear trolley (3) to adjust the left and right positions of the rear trolley (3). A square pin positioning mechanism (5) is also fixed on the rear trolley (3) to lock the position of the rear trolley (3). A pre-tensioning mechanism (6) is also symmetrically fixed on the rear trolley (3) to pre-tension the workpiece to be tested. A right fixed frame (7) is fixed on the rear trolley (3). A left fixed frame (8) is provided on the upper left side of the main beam (1). Traction mechanisms are installed on both the right fixed frame (7) and the left fixed frame (8). The traction mechanism (9) is interconnected with the locking mechanism (10). The locking mechanism (10) is used to lock and self-lock the workpiece to prevent it from loosening during the inspection process. The left fixed frame (8) is also equipped with an inspection mechanism (11) for workpiece inspection. The traction mechanism (9) includes a support frame (901) fixed on the right fixed frame (7) and the left fixed frame (8). A fourth hydraulic rod (902) is fixed on the support frame (901). The output end bearing of the fourth hydraulic rod (902) is connected to a second gear (903). The second gear (903) is interconnected with a second chain (904). The second chain (904) is connected to a second guide on the support frame (901) by a bearing. The gears (905) are interconnected, and one end of the second chain (904) is fixed to the support frame (901), and the other end of the second chain (904) is connected to the locking mechanism (10). The locking mechanism (10) includes an elliptical pin (1001) that is nested with the right fixed frame (7) and the left fixed frame (8). A convex shaft (1002) is symmetrically fixed on the elliptical pin (1001), and the convex shaft (1002) contacts the right fixed frame (7) and the left fixed frame (8) to achieve a limiting function. A movable plate (1003) is slidably connected inside the elliptical pin (1001), and a spring (1004) is fixed between the movable plate (1003) and the elliptical pin (1001). A vertical rod (1005) is fixed on the upper part of the movable plate (1003), and the vertical rod (1005) is fixed to the second chain (904). A fixing rod (1006) is fixed at the lower end of the movable plate (1003), and one end of the fixing rod (1006) is rotatably connected to the connecting rod (1007). The other end of the connecting rod (1007) is rotatably connected to the limiting plate (1008). At the same time, the limiting plate (1008) is slidably connected to the elliptical pin (1001). The limiting plate (1008) contacts the lower end face of the right fixed frame (7) and the lower end face of the left fixed frame (8) to achieve positioning. A round shaft (1009) is slidably connected in the inclined groove on the limiting plate (1008), and the round shaft (1009) is fixed on the movable frame (1010).Furthermore, the movable frame (1010) and the elliptical pin (1001) are slidably connected, and an arc-shaped plate (1011) is fixed on the movable frame (1010), with the arc-shaped plate (1011) and the elliptical pin (1001) being nested together.

2. The open-type tensile testing machine for ground beams according to claim 1, characterized in that: The walking mechanism (4) includes a first hydraulic rod (401) rotatably connected to the rear trolley (3), and the output end of the first hydraulic rod (401) is connected to the central rotating shaft of the folding frame (402). The upper end of the folding frame (402) is rotatably connected to the rear trolley (3), and the lower end of the folding frame (402) is connected to a walking wheel (405) by a bearing. The walking wheel (405) is connected to a reducer (403) fixed on the folding frame (402), and the reducer (403) is connected to a motor (404). The walking wheel (405) is rolled on a guide rail (406), and the guide rail (406) is symmetrically fixed on the beam (1) at the front and rear.

3. The open-type tensile testing machine for ground beams according to claim 1, characterized in that: The square pin positioning mechanism (5) includes a second hydraulic rod (501) fixed on the rear carriage (3), and the output end of the second hydraulic rod (501) is connected to a rotatable first gear (502). The first gear (502) is connected to the first chain (503), and one end of the first chain (503) is fixed to the rear carriage (3). The first chain (503) is connected to the first guide gear (504) on the rear carriage (3) with a bearing. The other end of the first chain (503) is fixed to the positioning square pin (505). The width of the positioning square pin (505) is smaller than the width of the positioning hole (2). The side of the positioning square pin (505) is also symmetrically provided with rollers (506). The rollers (506) are connected to the rear carriage (3) with bearings. The distance between the two rollers (506) is equal to the width of the positioning hole (2).

4. The open-type tensile testing machine for ground beams according to claim 1, characterized in that: The pre-tensioning mechanism (6) includes a third hydraulic rod (601) fixed on the rear trolley (3), and the output end of the third hydraulic rod (601) is fixed with a mounting block (602). The mounting block (602) is symmetrically connected with rotatable claws (603) at the front and rear. At the same time, a torsion spring is fixed between the claws (603) and the mounting block (602). The claws (603) are engaged with the positioning hole (2).

5. The open-type tensile testing machine for ground beams according to claim 1, characterized in that: The detection mechanism (11) includes a front trolley (1101) located inside the left fixed frame (8), and rollers (1102) are installed on both the top and bottom of the front trolley (1101), and the rollers (1102) contact the left fixed frame (8) to roll.

6. The open-type tensile testing machine for ground beams according to claim 5, characterized in that: The front trolley (1101) is also symmetrically fixed with positioning plates (1103) on the left and right sides, and the positioning plates (1103) contact the left fixed frame (8) to achieve positioning. The front trolley (1101) is also symmetrically fixed with guide plates (1104) on the front and back, and the guide plates (1104) are slidably connected to the left fixed frame (8). A pressure sensor (1105) is fixed between the left guide plate (1104) and the left fixed frame (8). At the same time, the right guide plate (1104) is fixed to the output end of the fifth hydraulic rod (1106). The fifth hydraulic rod (1106) is fixed to the fixed seat (1107), and the fixed seat (1107) is fixed on the beam (1).

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