Steel wire tensile testing device

Abstract

The present invention relates to the technical field of steel wire tensile testing devices, specifically a steel wire tensile testing device, comprising a base, a slide rail is fixedly installed on the upper end of the base, a stabilizing cylinder is provided on the right side of the slide rail, the stabilizing cylinder is rotatably connected to the base, a movable plate is slidably installed on the upper end of the slide rail, a reel is rotatably installed on the upper end of the movable plate, through holes are provided on both left and right ends of the reel, a driving cylinder is passed through the left through hole, a stabilizing rod is passed through the right through hole, and the driving cylinder and the stabilizing rod are both fixedly connected to the base, a sleeve is rotatably installed on one end of the stabilizing rod close to the driving cylinder, the sleeve is fixedly connected to the reel, and a wire breaking protection device is provided on one end of the driving cylinder close to the stabilizing rod, which releases the pressure inside the hydraulic cylinder instantly by eliminating the pressure inside the hydraulic cylinder, and the block moves in the opposite direction and offsets the inertia force of the movable plate. By reducing the inertial impact, the smoothness and safety of the experimental operation can be ensured, and unnecessary risks can be reduced.

Description

[0001] This application is a divisional application of the application filed on October 18, 2024, with application number 202411460492.2 and invention name “A device for detecting the tensile strength of a steel wire”. Technical Field

[0002] The invention relates to the technical field of steel wire tensile testing devices, in particular to a steel wire tensile testing device. Background Art

[0003] In modern industrial production, steel wire is widely used in construction, machinery, transportation, aerospace and other fields. Its tensile strength is an important indicator to measure the quality and performance of steel wire. The tensile strength of steel wire directly affects its service life and safety in various applications. Therefore, testing the tensile strength of steel wire is a key step to ensure product quality.

[0004] After searching, it was found that the prior art announcement number is CN 220019201 U, which discloses a device for detecting the tensile strength of a lifting wire rope for elevated construction, including a base, a first fixed plate and a second fixed plate fixedly connected to the top of the base, a first motor connected to the side of the second fixed plate, the first motor is rotatably connected to a screw rod, the outer edge of the screw rod is threadedly connected to a first limit plate, and the side of the first limit plate is fixedly connected to the side of the baffle. This scheme uses a lifting wire rope to detect the tensile strength of a lifting wire rope, and the second fixed plate and the first motor are used in conjunction with the screw rod to drive the first limit plate to rotate, and the baffle is limited by the second limit plate and the first limit rod, so that the baffle is moved during the tensile test to protect the wire stretching position.

[0005] Therefore, based on the above search and combined with existing technologies, when conducting tensile tests on steel wires, at the moment of steel wire breaking, the existence of inertial impact of the fixed base may cause inconsistencies in the instantaneous force and deformation in each experiment, thereby affecting the repeatability and consistency of the experiment, and at the same time causing greater pressure and stress on the transmission mechanism, hydraulic system, sensor and base of the tensile machine. For this reason, we propose a steel wire tensile testing device. Summary of the Invention

[0006] The object of the present invention is to provide a steel wire tensile testing device to solve the problems raised in the above background technology.

[0007] Base comprises support, castor, and frame upper is provided with guide rail, and support and conveyer frames movable end contact site are provided with recoil spring, and castor is arranged on the pin of base bottom four, to carry mobile handler location.

[0008] As a further solution of the present invention, a hydraulic pump is fixedly installed on the bottom end of the base, and a hydraulic cylinder is fixedly installed on the bottom end of the base. The hydraulic cylinder is located on the left side of the hydraulic pump, and the output end of the hydraulic pump and the input end of the hydraulic cylinder are fixedly connected through an output pipe. A push rod is passed through the inner end of the hydraulic cylinder, and the end of the push rod away from the hydraulic cylinder is fixedly connected to the movable plate.

[0009] As a further solution of the present invention, the stabilizing rod and the reel are connected by a torsion spring, and the torsion spring is located inside the reel. When the reel moves, it rotates under the action of the pulling force of the steel wire, compressing the torsion spring. A plurality of limiting rings are fixed on the end of the screw rod away from the stabilizing rod, and a paddle is fixed on the end of the limiting ring away from the screw rod.

[0010] As a further solution of the present invention, the wire break protection device includes an arc plate, which is rotatably installed on the right end of the driving cylinder. A plurality of rectangular holes are opened on the upper end of the arc plate, and force-bearing cylinders are passed through the rectangular holes. The bottom end of the force-bearing cylinder is located between two adjacent limiting ring plates.

[0011] As a further solution of the present invention, a shift block is rotatably installed on one end of the arc piece close to the driving cylinder, and a limit block is fixedly installed on one end of the arc piece close to the shift block. The limit block is located on the right side of the shift block. The shift piece corresponds to the shift block, so that the shift piece can better stir the shift block.

[0012] As a further solution of the present invention, a strip hole is opened at the right end of the force-bearing cylinder, and an arc block is rotatably installed at the inner end of the force-bearing cylinder. The right end of the arc block passes through the strip hole and is located on the lower side of the arc piece. A compression cylinder is fixedly installed at the inner upper end of the force-bearing cylinder, and a piston is passed through the inner end of the compression cylinder, and the bottom end of the piston is rotatably connected to the arc block.

[0013] As a further solution of the present invention, an extension tube is fixedly connected to the outer surface of the compression cylinder, a passive column is passed through the inner end of the extension tube, a ventilation tube is passed through the left end of the extension tube, a return spring is sleeved on the outer surface of the ventilation tube, the right end of the return spring abuts against the passive column, and the ventilation tube is passed through the interior of the passive column. Specifically, a ventilation groove is provided at the inner end of the passive column, and an air hole is provided on the outer surface of the ventilation tube, and when the passive column moves toward the direction of the ventilation tube, the ventilation groove and the air hole correspond to each other, thereby achieving the balance of the air pressure inside the compression cylinder.

[0014] As a further solution of the present invention, a movable rod is fixedly installed on the end of the paddle away from the limiting ring, and a plug is sleeved on the outer surface of the movable rod, a wire management plate is slidably installed on the upper end of the slide rail, a wire hook is fixedly installed on the upper end of the wire management plate, and the wire hook is sleeved on the outer surface of the steel wire, a rack is fixedly installed on the front end of the wire management plate, a volute is fixedly installed on the bottom end of the base, a driving gear is rotatably installed on the upper end of the volute, the driving gear is meshed with the rack, an impeller is rotatably installed on the inner end of the volute, and the impeller is fixedly connected to the driving gear.

[0015] As a further solution of the present invention, the outer surface of the output pipe is fixedly connected to a guide pipe, the output end of the guide pipe is fixedly connected to the input end of the volute, and the output end of the volute is fixedly connected to an air valve, the output end of the air valve is fixedly connected to a return pipe, the output end of the return pipe is fixedly connected to the hydraulic pump, and the output end of the drive cylinder is fixedly connected to the control end of the air valve via a drive pipe.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. When the present invention is in use, the pressure inside the hydraulic cylinder is eliminated, so that the pressure inside the hydraulic cylinder is released instantly, and the plug moves in the opposite direction, thereby offsetting the inertial force of the movable plate. By reducing the inertial impact, the experimental operation can be ensured to be smooth and safe, and unnecessary risks can be reduced;

[0018] 2. When the present invention is in use, the wire hook automatically hooks up the broken part, which can timely control the position of the wire, avoid unnecessary collision or threat to the surrounding environment, thereby improving the overall safety of the experiment;

[0019] 3. When the present invention is in use, the steel wire is wound outside the reel and multiple sets of coils are wound to avoid local excessive tension and breakage. After increasing the friction force, part of the tension is dispersed by the friction force, reducing the stress concentration at the connection, helping to avoid premature breakage at the connection, thereby better reflecting the actual tensile strength of the steel wire. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 Schematic diagram of the structure of a device for detecting the tensile strength of a steel wire 14;

[0021] Figure 2 Schematic diagram of the structure inside the reel;

[0022] Figure 3 Schematic diagram of the structure inside the sleeve;

[0023] Figure 4 Schematic diagram of the structure inside the driving cylinder;

[0024] Figure 5 It is a structural diagram of the arc piece;

[0025] Figure 6 It is a schematic diagram of the structure inside the load-bearing cylinder;

[0026] Figure 7 Schematic diagram of the structure inside the compression cylinder;

[0027] Figure 8 Schematic diagram of the structure inside the extension tube;

[0028] Figure 9 This is a structural diagram of the connection between the hydraulic pump and the hydraulic cylinder;

[0029] Figure 10 Schematic diagram of the internal structure of the volute;

[0030] Figure 11 Schematic diagram of the internal structure of the hydraulic cylinder.

[0031] In the figure: 1. Base; 2. Slide rail; 3. Cable management plate; 4. Guide ring; 5. Movable plate; 6. Reel;

[0032] 11. Stabilizing cylinder; 12. Baffle; 13. Wire hook; 14. Steel wire; 101. Drive tube; 102. Rack; 103. Drive gear; 104. Volute; 105. Hydraulic pump; 106. Hydraulic cylinder; 107. Push rod; 108. Guide tube; 109. Output pipe; 110. Return pipe; 111. Air valve; 112. Impeller; 113. Plug; 201. Drive cylinder; 202. Stabilizing rod; 203. Screw ; 204, torsion spring; 205, sleeve; 206, paddle; 207, movable rod; 208, limiting ring; 209, plug; 210, paddle block; 211, sealing cap; 301, arc piece; 302, force cylinder; 303, arc block; 304, compression cylinder; 305, piston; 306, extension tube; 307, passive column; 308, return spring; 309, vent pipe; 310, vent groove; 311, vent hole. DETAILED DESCRIPTION

[0033] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0034] Example 1: Please refer to Figure 1 、 9 11. A steel wire tensile testing device, comprising a base 1, a slide rail 2 being fixedly mounted on the upper end of the base 1, a stabilizing cylinder 11 being provided on the right side of the slide rail 2, the stabilizing cylinder 11 being rotatably connected to the base 1, specifically, a baffle 12 being rotatably mounted on the outer surface of the stabilizing cylinder 11, a hole being provided on the side of the baffle 12 close to the slide rail 2, a movable plate 5 being slidably mounted on the upper end of the slide rail 2, a reel 6 being rotatably mounted on the upper end of the movable plate 5, a guide ring 4 being fixedly mounted on the upper end of the movable plate 5, the guide ring 4 being located on the right side of the reel 6, a steel wire 14 to be tested being fixedly wound on the outer surface of the stabilizing cylinder 11, and the other side of the steel wire 14 One end passes through the hole on the outer surface of the baffle 12 and the guide ring 4 and is fixedly wound on the outer surface of the reel 6. The movable plate 5 moves in the direction away from the stabilizing cylinder 11, so that the steel wire 14 is taut. Specifically, the number of turns of the steel wire 14 wound around the stabilizing cylinder 11 and the outer surface of the reel 6 is a plurality of turns. The friction force is increased by the number of turns to ensure the stability of the steel wire 14 during the tensile test, so that the steel wire 14 is not easily separated from the reel 6 and continues to move in the direction away from the stabilizing cylinder 11 until the steel wire 14 is torn. The strength of the steel wire 14 is calculated by calculating the force generated when the movable plate 5 moves.

[0035] The bottom end of the base 1 is fixedly mounted with a hydraulic pump 105 by bolts, and the bottom end of the base 1 is fixedly mounted with a hydraulic cylinder 106 by bolts. The hydraulic cylinder 106 is located on the left side of the hydraulic pump 105, and the output end of the hydraulic pump 105 is fixedly connected to the input end of the hydraulic cylinder 106 by an output pipe 109. The inner end of the hydraulic cylinder 106 is penetrated by a push rod 107, and the right end of the push rod 107 is fixedly mounted with a plug 113. The outer surface of the plug 113 is fixedly mounted with a sealing rubber ring for increasing the airtightness between the plug and the inner wall of the hydraulic cylinder 106 (such as Figure 11 As shown), the end of the push rod 107 away from the hydraulic cylinder 106 is fixedly connected to the movable plate 5. The hydraulic pump 105 is an existing mature technology, so the output pressure is known. Then the relationship between the strength of the steel wire 14 and the pressure output by the hydraulic pump 105 can be used to obtain the ultimate tensile strength of the steel wire 14. Calculated, is the tensile strength of the steel wire 14 , F is the pressure applied by the hydraulic pump 105 (N), and A is the cross-sectional area of the steel wire 14 (mm²). It is worth noting that the above calculations are all completed by the computer controlling the hydraulic pump 105 ;

[0036] See also Figure 2 、 3 4. Through holes are provided at both ends of the drum 6. A driving cylinder 201 is passed through the left through hole, and a stabilizing rod 202 is passed through the right through hole. The driving cylinder 201 and the stabilizing rod 202 are both fixedly connected to the base 1. A sleeve 205 is rotatably installed at one end of the stabilizing rod 202 close to the driving cylinder 201. The sleeve 205 is located inside the drum 6. The sleeve 205 is fixedly connected to the drum 6. The output end of the hydraulic pump 105 delivers hydraulic oil to the hydraulic cylinder 106 through the output pipe 109, thereby realizing the push rod 107 to push the movable plate 5 toward the direction away from the stabilizing cylinder 11. When the steel wire 14 breaks, the resistance disappears. In order to prevent the push rod 107 from moving suddenly, a wire break protection device is provided at one end of the driving cylinder 201 close to the stabilizing rod 202 to prevent the movable plate 5 from continuing to move due to inertia, and a screw rod 203 is passed through the inner side of the stabilizing rod 202. Specifically, a rectangular groove is provided on the outer surface of the screw rod 203, and a rectangular block is fixedly installed on the inner end of the stabilizing rod 202. The rectangular block is located in the rectangular groove, thereby preventing the screw rod 203 from rotating when moving left and right in the stabilizing rod 202. The sleeve 205 is threadedly sleeved on the outer surface of the screw rod 203;

[0037] The stabilizing rod 202 is connected to the reel 6 by a torsion spring 204. The torsion spring 204 is located inside the reel 6 and on the right side of the sleeve 205. When the reel 6 moves, it rotates under the pulling force of the steel wire 14, compressing the torsion spring 204. When the reel 6 rotates, it drives the sleeve 205 to rotate and drives the screw rod 203 to move left or right in the sleeve 205. A plurality of limiting ring pieces 208 are fixed to the end of the screw rod 203 away from the stabilizing rod 202, and a paddle 206 is fixed to the end of the limiting ring piece 208 away from the screw rod 203.

[0038] Example 2: Please refer to Figure 4 、 5 6. A device for detecting the tensile strength of a steel wire 14. The difference from Example 1 is that the wire break protection device includes an arc piece 301, which is rotatably mounted on the right end of the driving cylinder 201. The arc piece 301 and the driving cylinder 201 are connected by a retaining spring. A plurality of rectangular holes are provided on the upper end of the arc piece 301. A force-bearing cylinder 302 is passed through each of the rectangular holes. The force-bearing cylinder 302 and the arc piece 301 are connected by an abutting spring so that the force-bearing cylinder 302 always maintains a downward force. The bottom end of the force-bearing cylinder 302 is located between two adjacent limiting ring pieces 208. Specifically, the limiting ring piece 208 is arc-shaped, and the bottom end of the force-bearing cylinder 302 is also arc-shaped.

[0039] The arc piece 301 is rotatably mounted on one end of the driving cylinder 201 with a shift block 210. The shift block 210 and the arc piece 301 are connected by a spring piece, and a limit block is fixedly mounted on one end of the arc piece 301 close to the shift block 210. The limit block is located on the right side of the shift block 210. The shift piece 206 corresponds to the shift block 210. When the shift piece 206 moves toward the left, it pushes the shift block 210 to rotate toward the left. When the shift piece 206 moves toward the right, it pushes the shift block 210 to rotate. At the same time, under the action of the limit block, the arc piece 301 is driven to rotate. When the arc piece 301 rotates, it drives the force cylinder 302 away from the limit ring 208. At this time, the elastic force of the torsion spring 204 is released, driving the reel 6 and the sleeve 205 to reverse, and driving the screw rod 203 to move toward the right.

[0040] like Figure 5 、 6 As shown in Figures 7 and 8, a strip hole is provided at the right end of the force-bearing cylinder 302, and an arc block 303 is rotatably installed at the inner end of the force-bearing cylinder 302. The right end of the arc block 303 passes through the strip hole and is located at the lower side of the arc piece 301. A compression cylinder 304 is fixedly installed at the inner upper end of the force-bearing cylinder 302, and a piston 305 is passed through the inner end of the compression cylinder 304. A sealing rubber ring is fixedly installed on the outer surface of the piston 305 to improve air tightness, and the bottom end of the piston 305 is rotatably connected to the arc block 303. The connection point of the piston 305 is located on the left side of the connection point of the arc block 303 and the force-bearing cylinder 302.

[0041] An extension tube 306 is fixedly connected to the outer surface of the compression cylinder 304. A passive column 307 is passed through the inner end of the extension tube 306. A vent tube 309 is passed through the left end of the extension tube 306. The vent tube 309 is sealed at one end close to the passive column 307. A return spring 308 is sleeved on the outer surface of the vent tube 309. The right end of the return spring 308 abuts against the passive column 307, and the vent tube 309 is passed through the interior of the passive column 307. Specifically, a vent groove 310 is provided at the inner end of the passive column 307, and a vent hole 311 is provided on the outer surface of the vent tube 309. When the passive column 307 moves toward the vent tube 309, the vent groove 310 corresponds to the vent hole 311.

[0042] More specifically, one end of the passive column 307 away from the vent pipe 309 is arc-shaped. When the piston 305 moves upward, it squeezes the arc of the passive column 307 and causes the passive column 307 to move toward the vent pipe 309.

[0043] like Figure 4As shown, a movable rod 207 is fixedly installed at one end of the paddle 206 away from the limiting ring 208, and a plug 209 is sleeved on the outer surface of the movable rod 207. Specifically, an air groove is opened on the outer surface of the movable rod 207, and a limiting ring is fixedly installed on the outer surface of the movable rod 207, and a sealing cap 211 is fixedly installed on the left end of the movable rod 207. The sealing cap 211 is located on the left side of the plug 209. When the movable rod 207 moves toward the left, the plug 209 is pushed to move by the action of the limiting ring. At the same time, due to the action of the air groove, no pressure is generated inside the driving cylinder 201. When the movable rod 207 moves toward the right, the right end of the sealing cap 211 abuts against the left side of the plug 209 and covers the air groove. At this time, when the plug 209 moves, negative pressure is generated in the driving cylinder 201.

[0044] See also Figure 1 、 9 , 10, 11, a wire management plate 3 is slidably mounted on the upper end of the slide rail 2, a wire hook 13 is fixedly mounted on the upper end of the wire management plate 3, the wire hook 13 is sleeved on the outer surface of the steel wire 14, a rack 102 is fixedly mounted on the front end of the wire management plate 3, a volute 104 is fixedly mounted on the bottom end of the base 1, a drive gear 103 is rotatably mounted on the upper end of the volute 104, and the drive gear 103 is meshed with the rack 102;

[0045] The inner end of the volute 104 is rotatably mounted with an impeller 112, which is fixedly connected to the driving gear 103. The outer surface of the output pipe 109 is fixedly connected to the guide pipe 108 through a tee. The output end of the guide pipe 108 is fixedly connected to the input end of the volute 104, and the output end of the volute 104 is fixedly connected to the air valve 111. The air valve 111 is provided with a valve core and a spring. The valve core inside the air valve 111 is moved by suction to adjust it to an open state. On the contrary, the normal air pressure is closed. The output end of the air valve 111 is fixedly connected to the air valve 111. It is connected to a return pipe 110, the output end of the return pipe 110 is fixedly connected to the hydraulic pump 105, and the output end of the drive cylinder 201 is fixedly connected to the control end of the air valve 111 through the drive pipe 101. When the pressure in the hydraulic cylinder 106 is released, the hydraulic oil inside it flows into the volute 104 through the guide pipe 108 and drives the impeller 112 to rotate. Then the impeller 112 rotates to drive the drive gear 103 to rotate. The rack 102, in engagement with the drive gear 103, realizes the movement of the wire management plate 3 to the right and picks up the broken steel wire 14.

[0046] The working principle of the present invention is:

[0047] When in use, any end of the steel wire 14 to be tested is fixed on the outer surface of the stabilizing cylinder 11 and wound several times, and then the other end passes through the hole on the outer surface of the baffle 12, and then passes through the wire hook 13 and the guide ring 4 respectively, and is fixed and wound on the outer surface of the reel 6. Then the hydraulic pump 105 is started, and the hydraulic oil enters the interior of the hydraulic cylinder 106 through the output pipe 109, squeezing the plug 113 to push the push rod 107 to move, and the push rod 107 pushes the movable plate 5 to move. At this time, the reel 6 is pulled by the steel wire 14 and starts to rotate, and the torsion spring 204 is compressed. At this time, the sleeve 205 rotates and drives the screw rod 203 to move to the left. The movement of the screw rod 203 drives the limiting ring piece 208 to move. Then, when the limiting ring piece 208 moves, the circular arcs are squeezed against each other, and then under the mutual squeezing of the slopes between the circular arcs, the force-bearing cylinder 302 moves upward;

[0048] At the same time, when the force cylinder 302 moves upward, the arc block 303 exposed outside the force cylinder 302 contacts the bottom end of the arc piece 301. When the force of the force cylinder 302 moving upward is large enough, the arc block 303 starts to rotate under the extrusion force of the arc position of the arc block 303 contacting the bottom end of the arc piece 301. The rotation of the arc block 303 drives the piston 305 to move upward. At this time, the air inside the compression cylinder 304 will be compressed, which means that a large force is required to drive the force cylinder 302 to move upward until the piston 305 and the arc position on the right side of the passive column 307 are in contact. When the piston 305 squeezes the arc of the passive column 307, it pushes the passive column 307 to move to the left, so that the return spring 308 is compressed, and the air vent 311 is connected to the vent groove 310, and the outside air is balanced with the air pressure inside the compression cylinder 304. Then, at this time, the bottom end of the force-bearing cylinder 302 falls between the next two adjacent limiting ring pieces 208. As the multiple force-bearing cylinders 302 and the limiting ring pieces 208 fit together, the steel wire 14 is fixed and a soft connection is realized at the same time, avoiding the hard connection during the pulling process that causes the steel wire 14 to break at an unpredictable position;

[0049] When the steel wire 14 breaks, the reel 6 loses its force, driving the reel 6 and the sleeve 205 to reverse, causing the movable rod 207 to move to the right. The right end of the sealing cap 211 abuts against the left side of the plug 209 and covers the air groove. At this time, when the plug 209 moves, negative pressure is generated in the driving cylinder 201, and the air valve 111 is adjusted to the open state through the driving pipe 101. Then the high-pressure environment inside the hydraulic cylinder 106 is instantly released. At this time, the plug 113 no longer moves to the left. At the same time, due to the instantaneous release of the internal pressure of the hydraulic cylinder 106, the plug 113 moves to the right, and drives the movable plate 5 to move. The inertia force of the movable plate 5 is offset and the plug 113 enters the volute 104 through the guide pipe 108, driving the impeller 112 to rotate. Subsequently, the rotation of the impeller 112 drives the drive gear 103 to rotate. The rack 102 meshes with the drive gear 103 to realize the movement of the wire management plate 3 to the right and pick up the broken steel wire 14.

[0050] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A steel wire tensile testing device, comprising a base (1), characterized in that: The upper end of the base (1) is fixedly mounted with a slide rail (2), the right side of the slide rail (2) is provided with a stabilizing cylinder (11), the stabilizing cylinder (11) is rotatably connected to the base (1), the upper end of the slide rail (2) is slidably mounted with a movable plate (5), the upper end of the movable plate (5) is rotatably mounted with a reel (6), the upper end of the movable plate (5) is fixedly mounted with a guide ring (4), the guide ring (4) is located on the right side of the reel (6), the outer surface of the stabilizing cylinder (11) is fixedly wound with a steel wire (14) to be detected, the other end of the steel wire (14) passes through the guide ring (4) and is fixedly wound on the outer surface of the reel (6), the reel Through holes are provided at both left and right ends of the cylinder (6), a driving cylinder (201) is passed through the left through hole, a stabilizing rod (202) is passed through the right through hole, and the driving cylinder (201) and the stabilizing rod (202) are both fixedly connected to the base (1), a sleeve (205) is rotatably mounted on one end of the stabilizing rod (202) close to the driving cylinder (201), the sleeve (205) is fixedly connected to the reel (6), a wire breaking protection device is provided on one end of the driving cylinder (201) close to the stabilizing rod (202) to prevent the movable plate (5) from continuing to move due to inertia, and a screw rod (203) is passed through the inner side of the stabilizing rod (202); The stabilizing rod (202) and the reel (6) are connected via a torsion spring (204), the torsion spring (204) being located inside the reel (6). When the reel (6) moves, it rotates under the pulling force of the steel wire (14), compressing the torsion spring (204). A plurality of limiting rings (208) are fixed to one end of the screw rod (203) away from the stabilizing rod (202), and a paddle (206) is fixed to one end of the limiting rings (208) away from the screw rod (203); A rectangular groove is formed on the outer surface of the screw rod (203), and a rectangular block is fixedly mounted on the inner end of the stabilizing rod (202). The rectangular block is located in the rectangular groove, thereby preventing the screw rod (203) from rotating when moving left and right in the stabilizing rod 202. The sleeve (205) is threadedly sleeved on the outer surface of the screw rod (203); The wire breaking protection device comprises an arc piece (301), the arc piece (301) is rotatably mounted on the right end of the driving cylinder (201), a plurality of rectangular holes are opened at the upper end of the arc piece (301), a force-bearing cylinder (302) is passed through each of the rectangular holes, and the bottom end of the force-bearing cylinder (302) is located between two adjacent limiting ring pieces (208); A shift block (210) is rotatably mounted on one end of the arc piece (301) close to the driving cylinder (201), and a limit block is fixedly mounted on one end of the arc piece (301) close to the shift block (210), the limit block being located on the right side of the shift block (210), and the shift piece (206) corresponds to the shift block (210); A strip hole is provided at the right end of the force-bearing cylinder (302), and an arc block (303) is rotatably mounted on the inner end of the force-bearing cylinder (302). The right end of the arc block (303) passes through the strip hole and is located on the lower side of the arc piece (301). A compression cylinder (304) is fixedly mounted on the inner upper end of the force-bearing cylinder (302), and a piston (305) is passed through the inner end of the compression cylinder (304), and the bottom end of the piston (305) is rotatably connected to the arc block (303). The outer surface of the compression cylinder (304) is fixedly connected to an extension tube (306), the inner end of the extension tube (306) is penetrated by a passive column (307), the left end of the extension tube (306) is penetrated by a vent tube (309), the outer surface of the vent tube (309) is sleeved with a return spring (308), the right end of the return spring (308) is in contact with the passive column (307), and the vent tube (309) is penetrated inside the passive column (307); The inner end of the passive column (307) is provided with a ventilation groove (310), and the outer surface of the ventilation tube (309) is provided with a ventilation hole (311), and when the passive column (307) moves toward the ventilation tube (309), the ventilation groove (310) corresponds to the ventilation hole (311).

2. A steel wire tensile testing device according to claim 1, characterized in that: A hydraulic pump (105) is fixedly mounted on the bottom end of the base (1), and a hydraulic cylinder (106) is fixedly mounted on the bottom end of the base (1). The hydraulic cylinder (106) is located on the left side of the hydraulic pump (105), and the output end of the hydraulic pump (105) is fixedly connected to the input end of the hydraulic cylinder (106) via an output pipe (109). A push rod (107) is passed through the inner end of the hydraulic cylinder (106), and the end of the push rod (107) away from the hydraulic cylinder (106) is fixedly connected to the movable plate (5).

3. A steel wire tensile testing device according to claim 1, characterized in that: A movable rod (207) is fixedly mounted on one end of the paddle (206) away from the limiting ring (208), and a plug (209) is sleeved on the outer surface of the movable rod (207); a wire management plate (3) is slidably mounted on the upper end of the slide rail (2); a wire hook (13) is fixedly mounted on the upper end of the wire management plate (3); the wire hook (13) is sleeved on the outer surface of the steel wire (14); a rack (102) is fixedly mounted on the front end of the wire management plate (3); a volute (104) is fixedly mounted on the bottom end of the base (1); a driving gear (103) is rotatably mounted on the upper end of the volute (104); the driving gear (103) is meshed with the rack (102); an impeller (112) is rotatably mounted on the inner end of the volute (104); and the impeller (112) is fixedly connected to the driving gear (103).

4. A steel wire tensile testing device according to claim 2, characterized in that: The outer surface of the output pipe (109) is fixedly connected to a guide pipe (108), the output end of the guide pipe (108) is fixedly connected to the input end of the volute (104), and the output end of the volute (104) is fixedly connected to an air valve (111), the output end of the air valve (111) is fixedly connected to a return pipe (110), the output end of the return pipe (110) is fixedly connected to a hydraulic pump (105), and the output end of the drive cylinder (201) is fixedly connected to the control end of the air valve (111) via the drive pipe (101).

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