Steel wire rope fatigue testing machine

Abstract

The utility model discloses a fatigue testing machine for a steel wire rope. The fatigue testing machine comprises a bracket, a push-pull assembly, a guide assembly and a tensioning assembly, a first supporting column and a second supporting column which are perpendicular to the horizontal plane are sequentially arranged on the support, the push-pull assembly comprises a fixing frame arranged on the side wall of the support and a connecting base movably connected with the fixing frame, and the connecting base is used for fixing the two ends of a steel wire rope and connected with the output end of an air cylinder. The guiding assembly comprises a first guiding wheel, a second guiding wheel and a third guiding wheel, the tensioning assembly is arranged below the third guiding wheel, and the steel wire rope starts from one end of the connecting base, sequentially winds around the first guiding wheel and the second guiding wheel in an S shape, winds around the third guiding wheel and then penetrates through the tensioning assembly to return to the other end of the connecting base. The relative positions of the two guide wheels can be flexibly adjusted by arranging the first guide wheel and the second guide wheel which are detachable, so that the bending degree of the steel wire rope wound around the two guide wheels is changed, and the length of the access path of the steel wire rope can be adjusted.

Description

Technical Field

[0001] The utility model belongs to the technical field related to wire rope detection, and particularly relates to a wire rope fatigue testing machine. Background Art

[0002] A wire rope is a helical wire bundle formed by twisting wires that meet the requirements of mechanical properties and geometric dimensions according to certain rules. A wire rope consists of wires, a rope core, and lubricating grease. First, multiple layers of wires are twisted into strands, and then, with the rope core as the center, a certain number of strands are twisted into a helical rope. In material handling machinery, it is used for lifting, traction, tensioning, and load bearing. The wire rope has high strength, light self-weight, stable operation, and is not likely to break suddenly as a whole, and is reliable in work. Wire ropes are widely used in engineering. Once a sudden break occurs, it will lead to catastrophic equipment accidents and personal accidents. To ensure the safety of wire rope use, national standards require that a bending fatigue test be carried out on it. In existing fatigue test instruments, it is necessary to fix both ends of the wire rope separately through fixed clamps. The fixing stability and disassembly convenience of the wire rope are of great significance for improving the accuracy and efficiency of fatigue testing. In addition, usually, the guide wheels in the instrument are in a fixed state, and the bending condition of the wire rope cannot be adjusted, and its test flexibility is not high. In view of this, a wire rope fatigue testing machine is proposed to improve the stability and flexibility of wire rope fatigue testing. Summary of the Invention

[0003] Aiming at the above existing problems, the utility model proposes a wire rope fatigue testing machine, which is provided with a first guide wheel and a second guide wheel with flexible adjustable positions, can adjust the bending degree of the wire rope, and at the same time, the fixing method of both ends of the wire rope is simple and easy to operate, and the wire rope is not easy to fall off during testing, improving the stability of testing.

[0004] To achieve the above object, the utility model adopts the following technical scheme: A wire rope fatigue testing machine includes a bracket, a push-pull assembly, a guiding assembly, and a tensioning assembly. A first support column and a second support column perpendicular to the horizontal plane are successively arranged on the bracket. The push-pull assembly includes a fixed frame arranged on the side wall of the bracket and a connecting seat movably connected to the fixed frame. The connecting seat is used for fixing both ends of the wire rope, and the connecting seat is connected to the output end of a cylinder. The guiding assembly includes a first guide wheel, a second guide wheel, and a third guide wheel. The first guide wheel and the second guide wheel are respectively detachably connected to the first support column and the second support column. The third guide wheel is fixed on the bracket and is used to change the moving direction of the wire rope. The tensioning assembly is arranged below the third guide wheel. The wire rope starts from one end of the connecting seat, bypasses the first guide wheel and the second guide wheel in an S shape, and after bypassing the third guide wheel, passes through the tensioning assembly and returns to the other end of the connecting seat.

[0005] Preferably, the tensioning assembly includes a vertically arranged sliding rod and a lifting seat slidably connected to the sliding rod. A fourth guide wheel is installed on the lifting seat, and the fourth guide wheel is used to change the moving direction of the steel wire rope. The side of the fourth guide wheel away from the connecting seat and the side of the third guide wheel away from the connecting seat are located on the same vertical line. Accommodating cavities are provided on both sides of the lifting seat for placing counterweights.

[0006] Preferably, a fifth guide wheel is further fixed on the bracket. The fifth guide wheel is located above the fourth guide wheel, and the side of the fifth guide wheel away from the connecting seat and the side of the fourth guide wheel close to the connecting seat are located on the same vertical line.

[0007] Preferably, a plurality of concave surfaces are provided on both the first support column and the second support column. The first guide wheel and the second guide wheel are both connected to the concave surfaces through a connecting member. The connecting member includes a base block, a first arc-shaped member, and a second arc-shaped member. The base block is connected to the first guide wheel or the second guide wheel. One ends of the first arc-shaped member and the second arc-shaped member are fixedly connected to the base block, and the other ends of the first arc-shaped member and the second arc-shaped member are fixed by bolts.

[0008] Preferably, the connecting seat includes an H-shaped base and mounting heads provided at both ends of the base up and down. The mounting head is away from the fixing frame and the mounting head is divided into an upper main body and a lower main body. The lower main body is fixedly connected to the base, and the upper main body is connected to the lower main body by bolts. Two rows of symmetric cylinders are provided in the lower main body. The steel wire rope enters from one end of the mounting head and bypasses the cylinders in a Z shape and then extends out from the other end of the mounting head.

[0009] Preferably, the cross-section of the lower main body is concave-shaped, and the cross-section shape of the upper main body matches the cross-section shape of the lower main body. The connection line of each row of cylinders is perpendicular to the lowest height cross-section of the lower main body and the height of the cylinders is higher than the lowest cross-section of the lower main body.

[0010] Preferably, anti-slip patterns are provided on the side walls of the cylinders.

[0011] Preferably, the first guide wheel and the second guide wheel have the same diameter and the diameters of the first guide wheel and the second guide wheel are smaller than the diameter of the third guide wheel.

[0012] The beneficial effects of the present utility model are as follows: The present utility model provides a wire rope fatigue testing machine. By setting detachable first and second guide wheels and cooperating with the first and second support columns, the relative positions of the first and second guide wheels can be flexibly adjusted, thereby changing the bending degree of the wire rope passing around the first and second guide wheels in sequence. At the same time, the path length of the wire rope in the testing machine can also be adjusted. By setting a tensioning component, a load can be provided to the wire rope, and a pushing and pulling component controls the reciprocating movement of the wire rope. The device has a simple structure, and the test is convenient and accurate. Further, the pushing and pulling component is provided with an installation head, which can conveniently fix both ends of the wire rope. A cylinder is provided inside the installation head, which can further increase the firmness of the wire rope fixed in the installation head and provide the stability of the test. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic structural diagram of a wire rope fatigue testing machine of the present utility model.

[0014] Figure 2 It is a schematic structural diagram of a connecting member of the present utility model.

[0015] Figure 3 It is a schematic structural diagram of a first support column of the present utility model.

[0016] Figure 4 It is a schematic structural diagram of an installation head of the present utility model.

[0017] Figure 5 It is a top view structural diagram of a lower main body of the present utility model.

[0018] In the figure: 1 - support, 2 - fixing frame, 3 - base, 4 - lower main body, 401 - cylinder, 5 - upper main body, 6 - first support column, 7 - second support column, 8 - first guide wheel, 9 - second guide wheel, 10 - third guide wheel, 11 - lifting seat, 12 - fourth guide wheel, 13 - accommodation cavity, 14 - sliding rod, 15 - fifth guide wheel, 16 - cylinder, 17 - base block, 18 - first arc-shaped member, 19 - second arc-shaped member, 20 - concave surface. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] In order to enable those skilled in the art to better understand the solution of the present utility model, the present utility model will be further described in detail below with reference to the accompanying drawings. The described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts shall fall within the protection scope of the present utility model.

[0020] Embodiment

[0021] As Figures 1-5As shown in the figure, this embodiment provides a wire rope fatigue testing machine, which includes a bracket 1, a push-pull assembly, a guiding assembly, and a tensioning assembly. On the bracket 1, a first pillar 6 and a second pillar 7 perpendicular to the horizontal plane are successively provided. The push-pull assembly includes a fixed frame 2 provided on the side wall of the bracket 1 and a connecting seat movably connected to the fixed frame 2. The connecting seat is used to fix both ends of the wire rope, and the connecting seat is connected to the output end of a cylinder 16. The connecting seat and the fixed frame 2 can be connected by a slider. The output end of the cylinder 16 is a piston rod. When the cylinder 16 is started, the piston rod drives the connecting seat to move up and down repeatedly. The guiding assembly includes a first guiding wheel 8, a second guiding wheel 9, and a third guiding wheel 10. The first guiding wheel 8 and the second guiding wheel 9 are respectively detachably connected to the first pillar 6 and the second pillar 7. The third guiding wheel 10 is fixed on the bracket 1 to change the moving direction of the wire rope. The tensioning assembly is arranged below the third guiding wheel 10. The wire rope starts from one end of the connecting seat, bypasses the first guiding wheel 8 and the second guiding wheel 9 in an S shape in turn, passes through the tensioning assembly after bypassing the third guiding wheel 10, and returns to the other end of the connecting seat. Refer to Figure 1 , the running direction of the wire rope is: first bypass from above the first guiding wheel 8, then bypass from below the second guiding wheel 9, and then bypass from above the third guiding wheel 10 and reach the tensioning assembly downward.

[0022] The tensioning assembly includes a vertically arranged slide rod 14 and a lifting seat 11 slidably connected to the slide rod 14. A fourth guiding wheel 12 is installed on the lifting seat 11. The fourth guiding wheel 12 is used to change the moving direction of the wire rope. The side of the fourth guiding wheel 12 away from the connecting seat and the side of the third guiding wheel 10 away from the connecting seat are located on the same vertical line; both sides of the lifting seat 11 are provided with receiving cavities 13 for placing counterweights.

[0023] A fifth guiding wheel 15 is also fixed on the bracket 1. The fifth guiding wheel 15 is located above the fourth guiding wheel 12. The side of the fifth guiding wheel 15 away from the connecting seat and the side of the fourth guiding wheel 12 close to the connecting seat are located on the same vertical line.

[0024] A number of concave surfaces 20 are provided on both the first support column 6 and the second support column 7. The first guide wheel 8 and the second guide wheel 9 are both connected to the concave surface 20 through a connecting member. The connecting member includes a base block 17, a first arc-shaped member 18, and a second arc-shaped member 19. The base block 17 is connected to the first guide wheel 8 or the second guide wheel 9. One end of the first arc-shaped member 18 and the second arc-shaped member 19 is fixedly connected to the base block 17, and the other end of the first arc-shaped member 18 and the second arc-shaped member 19 is fixed by bolts. After the first arc-shaped member 18 and the second arc-shaped member 19 are fixed by bolts, the formed inner ring exactly fits the concave surface 20 part on the first support column 6 or the second support column 7, that is, the inner ring exactly engages with the concave surface 20, so as to achieve the purpose of fixing the first guide wheel 8 or the second guide wheel 9 on the first support column 6 / second support column 7.

[0025] The connecting seat includes an H-shaped base 3 and mounting heads provided at both ends of the base 3 up and down. Refer to Figure 2 , the mounting head is far from the fixing frame 2 and the mounting head is divided into an upper main body 5 and a lower main body 4. The lower main body 4 is fixedly connected to the base 3. The upper main body 5 is connected to the lower main body 4 by bolts. Two rows of symmetric cylinders 401 are provided in the lower main body 4. The steel wire rope enters from one end of the mounting head and bypasses the cylinders 401 in a Z shape and then extends out from the other end of the mounting head.

[0026] Refer to Figure 4 , the cross section of the lower main body 4 is concave-shaped, the cross section shape of the upper main body 5 matches the cross section shape of the lower main body 4, the connection line of each row of cylinders 401 is perpendicular to the lowest height cross section of the lower main body 4 and the height of the cylinders 401 is higher than the lowest cross section of the lower main body 4. The specific fixing method of the steel wire rope on the mounting head is: first place the steel wire rope in the lower main body 4, bypass the cylinders 401 in a Z shape and then extend one end part of it out of the lower main body 4, and then use bolts to fix the upper main body 5 and the lower main body 4, then one end of the steel wire rope can be fixed on the mounting head.

[0027] Anti-slip lines are provided on the side wall of the cylinder 401. Setting the anti-slip lines can increase the friction between the side wall of the cylinder 401 and the steel wire rope, which can hinder the displacement of the steel wire rope during the test and improve the fixing firmness of the steel wire rope.

[0028] The diameters of the first guide wheel 8 and the second guide wheel 9 are the same and the diameters of the first guide wheel 8 and the second guide wheel 9 are smaller than the diameter of the third guide wheel 10.

[0029] During the test of the wire rope fatigue testing machine, first adjust the relative positions of the first guide pulley 8 and the second guide pulley 9 according to requirements. Fix one end of the wire rope through the mounting head near the first guide pulley 8. Then, wind the wire rope around the first guide pulley 8 and the second guide pulley 9 in an S shape in sequence, and then around the third guide pulley 10 and the fourth guide pulley 12 on the lifting seat 11. The two ends of the wire rope are parallel at the fourth guide pulley 12. Finally, the wire rope winds around the fifth guide pulley 15 and then returns to the other mounting head and is fixed on the mounting head, realizing the installation of the wire rope on the testing machine. Place an appropriate number of counterweight blocks in the accommodating cavities 13 on both sides of the lifting seat 11 to adjust the tension of the wire rope. Start the cylinder 16. The cylinder 16 drives the connecting seat to reciprocate up and down along the fixed frame 2, and start the reciprocating motion test of the wire rope until the wire rope undergoes fatigue fracture. Turn off the power supply of the cylinder 16, remove the wire rope from the mounting head, record the data, and complete the test.

[0030] The utility model provides a wire rope fatigue testing machine, which can quickly and firmly fix both ends of the wire rope on the push-pull assembly, cooperate with the guiding assembly and the tensioning assembly to realize the reciprocating motion of the wire rope, and set the first guide pulley and the second guide pulley with variable relative positions, which can flexibly change the bending degree of the wire rope, realize the bending fatigue test of the wire rope under different wrap angles, and effectively improve the test effect of the testing machine.

[0031] The preferred embodiments of the utility model disclosed above are only used to help explain the utility model, and do not limit the utility model to the specific embodiments described. Obviously, according to the content of this specification, other modifications and changes can be made. The embodiments selected and specifically described in this specification are for better explaining the principle and practical application of the utility model, so that those skilled in the art can well understand and utilize the utility model. It is not a limitation of the utility model. Any scheme obtained by simply deforming the utility model belongs to the protection scope of the utility model.

Claims

1. A wire rope fatigue testing machine, comprising a bracket, a push-pull assembly, a guiding assembly and a tensioning assembly, characterized in that: A first support column and a second support column perpendicular to the horizontal plane are successively arranged on the support. The push-pull assembly includes a fixed frame arranged on the side wall of the support and a connecting seat movably connected to the fixed frame. The connecting seat is used to fix both ends of a steel wire rope, and the connecting seat is connected to the output end of a cylinder; the guiding assembly includes a first guiding wheel, a second guiding wheel, and a third guiding wheel. The first guiding wheel and the second guiding wheel are respectively detachably connected to the first support column and the second support column. The third guiding wheel is fixed on the support to change the moving direction of the steel wire rope; the tensioning assembly is arranged below the third guiding wheel. The steel wire rope starts from one end of the connecting seat and successively bypasses the first guiding wheel and the second guiding wheel in an S shape, passes through the tensioning assembly after bypassing the third guiding wheel, and returns to the other end of the connecting seat.

2. The wire rope fatigue testing machine according to claim 1, characterized in that: The tensioning assembly includes a vertically arranged sliding rod and a lifting seat slidably connected to the sliding rod. A fourth guiding wheel is installed on the lifting seat, and the fourth guiding wheel is used to change the moving direction of the steel wire rope. The side of the fourth guiding wheel away from the connecting seat and the side of the third guiding wheel away from the connecting seat are located on the same vertical line; accommodating cavities are arranged on both sides of the lifting seat for placing counterweights.

3. The wire rope fatigue testing machine according to claim 2, characterized in that: A fifth guiding wheel is also fixed on the support. The fifth guiding wheel is located above the fourth guiding wheel. The side of the fifth guiding wheel away from the connecting seat and the side of the fourth guiding wheel close to the connecting seat are located on the same vertical line.

4. The wire rope fatigue testing machine according to claim 1, characterized in that: A plurality of concave surfaces are arranged on both the first support column and the second support column. The first guiding wheel and the second guiding wheel are both connected to the concave surfaces through a connecting member. The connecting member includes a base block, a first arc-shaped member, and a second arc-shaped member. The base block is connected to the first guiding wheel or the second guiding wheel. One end of the first arc-shaped member and the second arc-shaped member is fixedly connected to the base block, and the other end of the first arc-shaped member and the second arc-shaped member is fixed by bolts.

5. The wire rope fatigue testing machine according to claim 1, wherein: The connecting seat includes an H-shaped base and mounting heads arranged at both ends of the base up and down. The mounting heads are far away from the fixed frame and the mounting heads are divided into an upper main body and a lower main body. The lower main body is fixedly connected to the base, and the upper main body is connected to the lower main body by bolts. Two rows of symmetric cylinders are arranged in the lower main body. The steel wire rope enters from one end of the mounting head and bypasses the cylinders in a Z shape and then extends out from the other end of the mounting head.

6. The wire rope fatigue testing machine according to claim 5, characterized in that: The cross-section of the lower main body is concave-shaped, and the cross-section shape of the upper main body matches the cross-section shape of the lower main body. The connection line of each row of cylinders is perpendicular to the lowest height cross-section of the lower main body and the height of the cylinders is higher than the lowest cross-section of the lower main body.

7. The wire rope fatigue testing machine according to claim 6, characterized in that: Anti-slip patterns are arranged on the side walls of the cylinders.

8. The wire rope fatigue testing machine according to claim 7, characterized in that: The diameters of the first guiding wheel and the second guiding wheel are the same and the diameters of the first guiding wheel and the second guiding wheel are smaller than the diameter of the third guiding wheel.

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