Steel wire tensile detection device

Abstract

The invention relates to the technical field of steel wire tensile detection devices, in particular to a steel wire tensile detection device which comprises a base, a sliding rail is fixedly mounted at the upper end of the base, a stabilizing cylinder is arranged on the right side of the sliding rail and rotatably connected with the base, a movable plate is slidably mounted at the upper end of the sliding rail, and a winding drum is rotatably mounted at the upper end of the movable plate. Through holes are formed in the left end and the right end of the winding drum, a driving cylinder penetrates through the left through hole, a stabilizer bar penetrates through the right through hole, the driving cylinder and the stabilizer bar are fixedly connected with the base, a sleeve is rotationally installed at the end, close to the driving cylinder, of the stabilizer bar and fixedly connected with the winding drum, and a broken line protection device is arranged at the end, close to the stabilizer bar, of the driving cylinder. By eliminating the pressure in the hydraulic cylinder, the pressure in the hydraulic cylinder is released instantly, the plug block moves in the opposite direction, the inertia force of the movable plate is counteracted, and by reducing inertia impact, the stability and safety of experiment operation can be ensured, and unnecessary risks are 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 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 as to move the baffle to protect the wire stretching position during tensile testing.

[0005] Therefore, based on the above search and combined with the existing technology, when the steel wire is tensile tested, at the moment of steel wire breaking, the existence of inertial impact of the fixed base may cause inconsistency 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 test 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] The sled is provided with a sled that is fixedly provided with a guide rail at the top end of the base, and a stabilizing rod is provided on the right side of the base, and the stabilizing rod is rotatably connected to the base, and a movable plate is slidably installed on the upper end of the slide rail, and a winding drum is rotatably installed on the upper end of the movable plate, and a guide ring is fixedly installed on the upper end of the movable plate, and the guide ring is located on the right side of the winding drum, and a steel wire to be detected is fixedly wound on the outer surface of the winding drum, and the other end of the steel wire passes through the guide ring and is fixedly wound on the outer surface of the winding drum. Through holes are provided at both ends of the winding drum, a driving drum is penetrated in the left through hole, a stabilizing rod is penetrated in the right through hole, and the driving drum and the stabilizing rod are both fixedly connected to the base, and a sleeve is rotatably installed on one end of the stabilizing rod close to the driving drum, and the sleeve is fixedly connected to the winding drum, and a wire breaking protection device is provided on one end of the driving drum close to the stabilizing rod to prevent the movable plate from continuing to move due to inertia, and a screw rod is penetrated on the inner side of the stabilizing rod.

[0008] As a further solution of the present invention, a hydraulic pump is fixedly installed at the bottom end of the base, and a hydraulic cylinder is fixedly installed at 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 is fixedly connected to the input end of the hydraulic cylinder 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 to the end of the lead screw away from the stabilizing rod, and a paddle is fixedly installed to the end of the limiting ring away from the lead screw.

[0010] As a further solution of the present invention, the wire break protection device includes an arc piece, 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 piece, 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 pieces.

[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 move 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 at 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, 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 one 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, a guide tube is fixedly connected to the outer surface of the output pipe, the output end of the guide tube 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 a hydraulic pump, and the output end of the drive cylinder is fixedly connected to the control end of the air valve via a drive tube.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. When the present invention is used, 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, and the inertial force of the movable plate is offset. By reducing the inertial impact, the smoothness and safety of the experimental operation can be ensured, and unnecessary risks can be reduced; 2. When the present invention is used, the position of the steel wire can be controlled in time by automatically hooking up the broken part through the wire hook, avoiding unnecessary collision or threat to the surrounding environment, thereby improving the overall safety of the experiment; 3. When the present invention is in use, the steel wire is wound outside the drum and multiple sets of coils are wound to avoid local breakage caused by excessive tension. 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

[0017] Figure 1It is a structural schematic diagram of a device for detecting the tensile strength of a steel wire 14; Figure 2 It is a schematic diagram of the structure inside the reel; Figure 3 It is a schematic diagram of the structure inside the sleeve; Figure 4 It is a schematic diagram of the structure inside the driving cylinder; Figure 5 It is a schematic diagram of the structure at the arc piece; Figure 6 It is a schematic diagram of the structure inside the force-bearing cylinder; Figure 7 It is a schematic diagram of the structure inside the compression cylinder; Figure 8 It is a schematic diagram of the structure inside the extension tube; Fig. 9 It is a structural diagram of the connection relationship between the hydraulic pump and the hydraulic cylinder; Fig.10 Schematic diagram of the internal structure of the volute; Fig.11 Schematic diagram of the internal structure of the hydraulic cylinder.

[0018] In the figure: 1. Base; 2. Slide rail; 3. Cable management plate; 4. Guide ring; 5. Movable plate; 6. Reel; 11. Stabilizing cylinder; 12. Baffle; 13. Wire hook; 14. Steel wire; 101. Driving tube; 102. Rack; 103. Driving 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. Block; 201. Driving cylinder; 202. Stabilizing rod; 203. Screw rod ; 204, torsion spring; 205, sleeve; 206, paddle; 207, movable rod; 208, limit 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, ventilation pipe; 310, ventilation groove; 311, air vent. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] Example 1: Please refer to Figure 1, 9 11. A steel wire tensile testing device comprises a base 1, a slide rail 2 is fixedly mounted on the upper end of the base 1, a stabilizing cylinder 11 is arranged on the right side of the slide rail 2, and the stabilizing cylinder 11 is rotatably connected to the base 1. Specifically, a baffle 12 is rotatably mounted on the outer surface of the stabilizing cylinder 11, and a hole is provided on the side of the baffle 12 close to the slide rail 2. A movable plate 5 is slidably mounted on the upper end of the slide rail 2, a reel 6 is rotatably mounted on the upper end of the movable plate 5, a guide ring 4 is fixedly mounted on the upper end of the movable plate 5, and the guide ring 4 is located on the right side of the reel 6. A steel wire 14 to be tested is fixedly wound on the outer surface of the stabilizing cylinder 11, and the other side of the steel wire 14 is 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 on 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 easy to separate from the reel 6, and continues to move in the direction away from the stabilizing cylinder 11 until the steel wire 14 is torn off. The strength of the steel wire 14 is calculated by calculating the force generated when the movable plate 5 moves. A hydraulic pump 105 is fixedly installed at the bottom end of the base 1 by bolts, and a hydraulic cylinder 106 is fixedly installed at the bottom end of the base 1 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. A push rod 107 is passed through the inner end of the hydraulic cylinder 106, and a plug 113 is fixedly installed at the right end of the push rod 107. A sealing rubber ring is fixedly installed on the outer surface of the plug 113 to increase the air tightness between the plug and the inner wall of the hydraulic cylinder 106 (such as Fig.11 As shown in FIG. 1 ), 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. The formula It is calculated that is the tensile strength of the steel wire 14, F is the pressure (N) applied by the hydraulic pump 105, and A is the cross-sectional area (mm²) of the steel wire 14. It is worth noting that the above calculations are all completed by the computer controlling the hydraulic pump 105; See also Figure 2 , 34, through holes are provided at both ends of the drum 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 installed at one end of the stabilizing rod 202 close to the driving cylinder 201, the sleeve 205 is located inside the drum 6, and the sleeve 205 is fixedly connected to the drum 6, and 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 to move away from the stabilizing cylinder 11 When the steel wire 14 breaks, the resistance disappears. To prevent the push rod 107 from moving suddenly, a wire breaking 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, so that the screw rod 203 is prevented 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 stabilizing rod 202 is connected to the reel 6 via a torsion spring 204, which 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 lead screw 203 to move left or right in the sleeve 205. A plurality of limiting ring pieces 208 are fixed to one end of the lead screw 203 away from the stabilizing rod 202, and a paddle 206 is fixed to one end of the limiting ring piece 208 away from the lead screw 203.

[0021] Example 2: Please refer to Figure 4 , 5 6. A tensile strength detection device for a steel wire 14, which is different from Example 1 in that the wire breaking protection device comprises an arc piece 301, which is rotatably mounted on the right end of a driving cylinder 201, and the arc piece 301 is connected to the driving cylinder 201 by a retaining spring, and a plurality of rectangular holes are provided at the upper end of the arc piece 301, and a force-bearing cylinder 302 is penetrated in each of the rectangular holes, and the force-bearing cylinder 302 is connected to the arc piece 301 by an abutment spring, so that the force-bearing cylinder 302 always maintains a downward force, and the bottom end of the force-bearing cylinder 302 is located between two adjacent limiting ring pieces 208, and specifically, the limiting ring piece 208 is in the shape of an arc, and the bottom end of the force-bearing cylinder 302 is also in the shape of an arc; The arc piece 301 is rotatably mounted with a shift block 210 at one end close to the driving cylinder 201. The shift block 210 and the arc piece 301 are connected by a spring sheet, and a limit block is fixedly mounted at 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 block 206 corresponds to the shift block 210. When the shift block 206 moves toward the left, it pushes the shift block 210 to rotate toward the left. When the shift block 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. like Figure 5 , 6 As shown in , 7 and 8, a strip hole is provided at the right end of the force-bearing cylinder 302, an arc block 303 is rotatably installed at the inner end of the force-bearing cylinder 302, and the right end of the arc block 303 is located at the lower side of the arc piece 301 after passing through the strip hole, and a compression cylinder 304 is fixedly installed at the inner upper end of the force-bearing cylinder 302, and a piston 305 is penetrated at the inner end of the compression cylinder 304, and a sealing rubber ring is fixedly installed on the outer surface of the piston 305 for improving air tightness, and the bottom end of the piston 305 is rotatably connected to the arc block 303, and the connection of the piston 305 is located on the left side of the connection between the arc block 303 and the force-bearing cylinder 302; 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, a vent hole 311 is provided on the outer surface of the vent tube 309, and when the passive column 307 moves toward the vent tube 309, the vent groove 310 corresponds to the vent hole 311; More specifically, one end of the passive column 307 away from the vent pipe 309 is arc-shaped. When the piston 305 moves upward, the arc-shaped portion of the passive column 307 is squeezed and the passive column 307 moves toward the vent pipe 309. 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 to the left, the plug 209 is pushed to move by the limiting ring. At the same time, due to the action of the air groove, no pressure is generated inside the driving cylinder 201 at this time. When the movable rod 207 moves 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. 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 driving gear 103 is rotatably mounted on the upper end of the volute 104, and the driving gear 103 is meshed with the rack 102; 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, and 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, and 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, otherwise it is closed under normal air pressure. The output end of the air valve 111 is fixedly connected to the input end of the volute 104. A return pipe 110 is connected, and the output end of the return pipe 110 is fixedly connected to the hydraulic pump 105. The output end of the driving cylinder 201 is fixedly connected to the control end of the air valve 111 through the driving 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 driving gear 103 to rotate. The rack 102, in meshing with the driving gear 103, realizes the movement of the wire management plate 3 to the right and picks up the broken steel wire 14.

[0022] The working principle of the present invention is: 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 compresses the torsion spring 204. At this time, the sleeve 205 rotates and drives the screw rod 203 to move to the left, and the movement of the screw rod 203 drives the limit ring piece 208 to move. Then, when the limit 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; 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 acting on the force cylinder 302 to move 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 hole 311 is connected to the ventilation groove 310, and the external air is balanced with the air pressure inside the compression cylinder 304. Then, at this time, the bottom end of the force cylinder 302 falls between the next two adjacent limiting ring pieces 208. With the mutual fit between the multiple force cylinders 302 and the limiting ring pieces 208, the steel wire 14 is fixed, and a soft connection is realized at the same time, so as to avoid the steel wire 14 being broken at an unpredictable position due to a hard connection during the pulling process; When the steel wire 14 breaks, the reel 6 loses its force, driving the reel 6 and the sleeve 205 to reverse, so that the movable rod 207 moves to the right, and 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 an open state through the driving pipe 101, so that the high-pressure environment inside the hydraulic cylinder 106 is released instantly, and the plug 113 no longer continues to move 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, and offsets the inertia force of the movable plate 5, and then comes into the volute 104 through the guide pipe 108, driving the impeller 112 to rotate, and then the impeller 112 rotates to drive the driving gear 103 to rotate, and the rack 102 meshes with the driving gear 103 to realize the movement of the wire management plate 3 to the right and pick up the broken steel wire 14.

[0023] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed in the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A steel wire tensile testing device, comprising a base (1), characterized in that: A slide rail (2) is fixedly mounted on the upper end of the base (1), a stabilizing cylinder (11) is arranged on the right side of the slide rail (2), the stabilizing cylinder (11) is rotatably connected to the base (1), a movable plate (5) is slidably mounted on the upper end of the slide rail (2), a reel (6) is rotatably mounted on the upper end of the movable plate (5), a guide ring (4) is fixedly mounted on the upper end of the movable plate (5), the guide ring (4) is located on the right side of the reel (6), a steel wire (14) to be detected is fixedly wound on the outer surface of the stabilizing cylinder (11), 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 inserted into the left through hole, a stabilizing rod (202) is inserted into 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 winding cylinder (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 inserted into the inner side of the stabilizing rod (202); The stabilizing rod (202) and the reel (6) are connected via a torsion spring (204), wherein the torsion spring (204) is located inside the reel (6). When the reel (6) moves, it rotates under the pulling force of the steel wire (14), thereby compressing the torsion spring (204). A plurality of limiting ring pieces (208) are fixed to one end of the lead screw (203) away from the stabilizing rod (202), and a paddle (206) is fixedly mounted to one end of the limiting ring piece (208) away from the lead screw (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 penetrated in 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 is 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); 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 at 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); 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).

2. A steel wire tensile testing device according to claim 1, characterized in that: 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 ventilation tube (309) is passed through the left end of the extension tube (306), a return spring (308) is sleeved on the outer surface of the ventilation tube (309), the right end of the return spring (308) is in contact with the passive column (307), and the ventilation tube (309) is passed through the interior of the passive column (307).

3. A steel wire tensile testing device according to claim 2, characterized in that: The inner end of the passive column (307) is provided with a ventilation groove (310), the outer surface of the ventilation pipe (309) is provided with a ventilation hole (311), and when the passive column (307) moves toward the ventilation pipe (309), the ventilation groove (310) corresponds to the ventilation hole (311).

4. 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).

5. 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); the impeller (112) is fixedly connected to the driving gear (103).

6. A steel wire tensile testing device according to claim 4, 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), 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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