A steel cord core strand extraction force detection device

Abstract

The present invention relates to the field of steel cord detection technology, and in particular to a steel cord core strand extraction force detection device, including a tension cylinder filled with a tension spring connected to the lower end, and also including: two thread end fixing mechanisms symmetrically arranged above and below, the thread end fixing mechanism located at the top is connected to one end of the tension spring; the inner side of the tension cylinder is slidably connected with a slide plate, the upper end of the slide plate is fixed with an upper pull rod extending to the outside of the tension cylinder, and a plurality of through holes are provided at the edge of the slide plate. The present invention uses a plurality of unequal length push rods in the thrust mechanism, when the rack moves downward by a triangular tooth stroke, a greater number of locking teeth will engage with the same triangular tooth in turn, so that a greater number of push rods can lock the rack, so that the rack can maintain a one-way locking effect when it moves downward by a smaller stroke, further reducing the rebound distance of the upper pull rod and the slide plate, thereby improving the detection accuracy.

Description

Technical Field

[0001] The invention relates to the technical field of steel cord detection, in particular to a steel cord core strand extraction force detection device. Background Art

[0002] Steel cord is made of high-quality high-carbon steel and is mainly used to enhance the strength of rubber products. Steel cord is made of multiple steel wires twisted together. This structure gives it high strength and good toughness. It is widely used in tire manufacturing and is placed in the tire carcass and belt layer, which can significantly improve the tire's load-bearing capacity.

[0003] The steel cord includes a core wire in the middle and multiple surface wires on the outside. The tightness of the fit between the core wire and the multiple surface wires directly affects the overall strength of the steel cord, thereby affecting the bearing capacity of the tire product. Therefore, during the steel cord processing, the extraction force between the core wire and the surface wire needs to be tested.

[0004] After searching, a Chinese patent with publication number: CN205373938U discloses a steel cord core strand extraction force detection device, including a dynamometer, a balance beam, an upper clamp, a lower clamp and a movable crossbeam, the upper end of the dynamometer is fixedly connected to the balance beam, and the lower end thereof is fixedly connected to the upper clamp; the lower clamp is fixedly connected to the movable crossbeam, and the movable crossbeam is arranged below the upper clamp; the core wire end of the steel cord core strand sample to be tested is clamped in the upper clamp, and the surface wire end of the steel cord core strand sample to be tested is clamped in the lower clamp, and the movable crossbeam can be translated downward under the action of external force.

[0005] Based on the above search and combined with actual testing, it was found that when the device applies tension to the core wire and surface wire of the steel cord, the static friction between the two gradually increases before the two slide. When the static friction reaches the maximum value, the core wire and the surface wire will slide relative to each other. The maximum static friction is the extraction force of the core wire. However, in actual testing, it was found that at the moment when the core wire and the surface wire slide relative to each other, the static friction between the two instantly becomes relative sliding friction, and the sliding friction is less than the maximum static friction. Therefore, in this process, it is not convenient for the testing personnel to accurately observe the maximum static friction value through the scale line. When the core wire and the surface wire slide, the value displayed on the scale line at this time is smaller than the actual value, thereby reducing the detection accuracy. Summary of the invention

[0006] The object of the present invention is to provide a steel cord core strand extraction force detection device to solve the problems raised in the above background technology.

[0007] The technical solution of the present invention is: a steel cord core strand extraction force detection device, including a tension cylinder filled with a tension spring connected to the lower end, and also including: two thread end fixing mechanisms symmetrically arranged up and down, the thread end fixing mechanism located at the upper end is connected to one end of the tension spring; a slide plate is slidably connected to the inner side of the tension cylinder, an upper pull rod extending to the outer side of the tension cylinder is fixed on the upper end of the slide plate, and a plurality of through holes are provided at the edge of the slide plate, a non-return mechanism is provided inside the slide plate, and a one-way locking mechanism is provided on the upper end of the upper pull rod and the outer side of the tension cylinder; the non-return mechanism includes a central cavity and a baffle groove provided inside the slide plate, a rotating cylinder is rotatably connected to the inner side of the central cavity, a baffle movably connected to the inner side of the baffle groove is fixed on the outer side of the rotating cylinder, a plurality of circular holes corresponding to each through hole are provided on the baffle, a steering mechanism is provided between the rotating cylinder and the central cavity, and the lower end of the slide plate is connected to an upper thread end fixing mechanism through a trigger mechanism.

[0008] Preferably, the steering mechanism includes a plurality of guide grooves arranged on the outside of the rotating drum and a sliding sleeve movably arranged up and down at the upper end of the inner side of the central cavity. A sliding pin is rotatably connected to the outer side of the sliding sleeve at a position corresponding to each guide groove. Each sliding pin is movably connected to the inner side of the guide groove at a corresponding position. An electromagnet is installed at the lower end of the inner side of the central cavity, and the upper end of the electromagnet is elastically connected to the lower end of the sliding sleeve through a return spring.

[0009] Preferably, the guide groove includes two vertical slide grooves and a spiral inclined groove opened on the outer side of the drum, and two ends of the spiral inclined groove are smoothly connected to one end of the two vertical slide grooves respectively.

[0010] Preferably, a spline shaft is fixed to the inner upper end of the central cavity and located inside the drum, and the sliding sleeve is slidably mounted on the outer side of the spline shaft.

[0011] Preferably, the trigger mechanism includes a fixed cylinder fixed at the lower end of the slide, a micro switch is installed at the inner upper end of the fixed cylinder, and a connecting plate is movably provided on the inner side of the fixed cylinder, a lower pull rod extending to the outside of the tension cylinder is fixed at the lower end of the connecting plate, the lower end of the lower pull rod is connected to a wire end fixing mechanism located above, and the micro switch is electrically connected to the electromagnet through a control circuit.

[0012] Preferably, the one-way locking mechanism comprises a cross bar fixed to the upper end of the outer side of the upper pull rod and two thrust mechanisms symmetrically arranged on both sides of the upper end of the tension cylinder, and two racks are symmetrically fixed to both ends of the cross bar.

[0013] Preferably, the thrust mechanism includes a fixed shaft fixed to the upper end of the outer side of the tension cylinder, and the outer side of the fixed shaft is rotatably connected to a plurality of push rods of unequal lengths, one side of each push rod is elastically connected to the outer side of the tension cylinder through a push rod spring, and one end of each push rod is provided with locking teeth that can engage with the triangular teeth on the rack, and an equal length difference is maintained between each two adjacent push rods.

[0014] Preferably, the thread end fixing mechanism comprises a fixing block, one end of which is provided with a fixing groove, and one side of the fixing block is threadedly connected with a clamping stud extending to the inner side of the fixing groove.

[0015] Preferably, it also includes a base plate placed on the ground, which is fixedly connected to the bottom of the fixed block located below, a fixed frame is fixed to the outside of the tension cylinder, and two lifting electric cylinders are installed on the upper side of the base plate, and the telescopic ends of the two lifting electric cylinders are fixedly connected to the outside of the fixed frame.

[0016] Preferably, a measuring cylinder is fixed to the inner upper end of the fixed frame, a suspension rod is fixed to the upper end of the upper pull rod, a pointer plate slidably connected to the inner side of the measuring cylinder is fixed to the upper end of the suspension rod, a pointer is provided on the outer side of the pointer plate, an observation groove is provided on one side of the measuring cylinder, and scale lines are provided on the outer side of the measuring cylinder at the position of the observation groove.

[0017] The present invention provides a steel cord core strand extraction force detection device through improvement, which has the following improvements and advantages compared with the prior art:

[0018] First, the present invention uses a trigger mechanism to immediately control the electromagnet of the steering mechanism to generate electromagnetic attraction when the core wire and the surface wire of the steel cord break through the maximum static friction force, that is, the moment when the two produce relative sliding, and drives the baffle to rotate a certain angle through the steering mechanism, and blocks each through hole through the baffle, so that the damping oil at both ends of the tension cylinder cannot flow to each other, so that the slide plate cannot move up and down along the inner side of the tension cylinder, thereby preventing the upper pull rod from moving up and down, thereby preventing the pointer plate and the pointer from moving up and down, so that at the moment when the core wire and the surface wire break through the maximum static friction force, the rebound of the tension spring can be reduced, thereby reducing the reverse movement stroke of the pointer plate, thereby reducing the error between the measured value and the actual value, and improving the detection accuracy.

[0019] Secondly, the present invention uses a one-way locking mechanism. When tension is applied to the steel cord, the upper pull rod and the slide plate will move downward, and the upper pull rod drives the two racks of the one-way locking mechanism to move downward. When the rack moves downward, the locking teeth at one end of the push rod can slide along the surface of multiple triangular teeth on one side of the rack. When the rack moves upward in the opposite direction, the locking teeth can engage with the triangular teeth on one side of the rack, thereby playing a one-way locking role. Therefore, it can further prevent the upper pull rod from moving upward when the core line and the surface line break through the maximum static friction.

[0020] Thirdly, the present invention uses a plurality of push rods of unequal lengths in the thrust mechanism. When the rack moves downward by a triangular tooth stroke, a greater number of locking teeth will engage with the same triangular tooth in turn, thereby having a greater number of push rods to lock the rack. Therefore, the rack can maintain a one-way locking effect when it moves downward by a smaller stroke, further reducing the rebound distance of the upper pull rod and the slide plate, thereby further improving the detection accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 It is a schematic diagram of the forward structure of the present invention;

[0023] Figure 2 For the present invention Figure 1 A schematic diagram of the enlarged structure at A in the middle;

[0024] Figure 3 It is a schematic diagram of the structure inside the tension cylinder of the present invention;

[0025] Figure 4 It is a schematic diagram of a first cross-sectional structure of the slide plate of the present invention;

[0026] Figure 5 is a second cross-sectional structural schematic diagram of the slide plate of the present invention;

[0027] Figure 6 For the present invention Figure 4 Schematic diagram of the enlarged structure at D in the middle;

[0028] Figure 7 For the present invention Figure 5 Schematic diagram of the enlarged structure at E in the middle;

[0029] Figure 8 For the present invention Figure 3A schematic diagram of the enlarged structure at B in the middle;

[0030] Fig. 9 For the present invention Figure 3 Schematic diagram of the enlarged structure at C in the middle;

[0031] Fig.10 It is a schematic diagram of the structure of the rotating drum and the baffle in the present invention.

[0032] Reference numerals:

[0033] 1. Tension cylinder; 2. Tension spring; 3. Upper pull rod; 4. Slide plate; 5. Through hole; 6. Bottom plate; 7. Lifting electric cylinder; 8. Fixed frame; 9. Measuring cylinder; 10. Suspension rod; 11. Pointer plate; 12. Pointer; 13. Observation slot; 14. Scale line; 101. Center cavity; 102. Baffle slot; 103. Rotating cylinder; 104. Baffle; 105. Round hole; 106. Guide slot; 107. Sliding sleeve; 108. Electromagnet; 1 09, return spring; 110, sliding pin; 111, spline shaft; 201, fixed cylinder; 202, micro switch; 203, connecting plate; 204, pull-down rod; 301, fixed block; 302, fixed groove; 303, clamping stud; 401, fixed shaft; 402, push rod; 403, locking teeth; 404, push rod spring; 405, cross bar; 406, rack; 1061, vertical slide groove; 1062, spiral bevel groove. DETAILED DESCRIPTION

[0034] The present invention is described in detail below, and the technical solutions in the embodiments of the present invention are clearly and completely described. 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.

[0035] The present invention provides a steel cord core strand extraction force detection device through improvement. The technical solution of the present invention is:

[0036] like Figures 1 to 10 As shown, the embodiment of the present invention provides a steel cord core strand extraction force detection device, comprising a tension cylinder 1 filled with tension springs 2 connected to the lower end, and further comprising: two thread end fixing mechanisms symmetrically arranged above and below, wherein the thread end fixing mechanism located above is connected to one end of the tension spring 2; a slide plate 4 is slidably connected to the inner side of the tension cylinder 1, an upper pull rod 3 extending to the outer side of the tension cylinder 1 is fixed to the upper end of the slide plate 4, and a plurality of through holes 5 (such as Figure 6As shown in the figure, a check mechanism is arranged inside the slide plate 4, and a one-way locking mechanism is arranged at the upper end of the upper pull rod 3 and the outer side of the tension cylinder 1; the check mechanism includes a central cavity 101 and a baffle groove 102 opened inside the slide plate 4, a rotating cylinder 103 is rotatably connected to the inner side of the central cavity 101, a baffle 104 movably connected to the inner side of the baffle groove 102 is fixed to the outer side of the rotating cylinder 103, a plurality of circular holes 105 corresponding to each through hole 5 are opened on the baffle 104, a steering mechanism is arranged between the rotating cylinder 103 and the central cavity 101, and the lower end of the slide plate 4 is connected to a thread fixing mechanism above through a trigger mechanism.

[0037] Furthermore, the steering mechanism includes a plurality of guide grooves 106 arranged on the outside of the rotating drum 103 and a sliding sleeve 107 movably arranged at the upper end of the inner side of the central cavity 101. The outer side of the sliding sleeve 107 is rotatably connected with a sliding pin 110 at a position corresponding to each guide groove 106. Each sliding pin 110 is movably connected to the inner side of the guide groove 106 at the corresponding position. An electromagnet 108 is installed at the lower end of the inner side of the central cavity 101. The upper end of the electromagnet 108 is elastically connected to the lower end of the sliding sleeve 107 through a return spring 109. The guide groove 106 includes two vertical sliding grooves 1061 and a spiral inclined groove 1062 opened on the outer side of the rotating drum 103. The two ends of the spiral inclined groove 1062 are smoothly connected to one end of the two vertical sliding grooves 1061 respectively.

[0038] The steering mechanism is used to drive the baffle 104 to rotate a certain angle, and each through hole 5 is blocked by the baffle 104, so that the damping oil at both ends of the tension cylinder 1 cannot flow to each other, so that the slide plate 4 cannot move up and down along the inner side of the tension cylinder 1, thereby preventing the upper pull rod 3 from moving up and down. Therefore, at the moment when the core line and the surface line break through the maximum static friction force, the rebound of the tension spring 2 can be reduced, thereby reducing the reverse movement stroke of the slide plate 4 and the upper pull rod 3, thereby reducing the error between the measured value and the actual value.

[0039] Furthermore, a spline shaft 111 is fixed to the inner upper end of the central cavity 101 and located inside the rotating cylinder 103, and the sliding sleeve 107 is slidably sleeved on the outer side of the spline shaft 111;

[0040] Through the active cooperation between the spline shaft 111 and the sleeve 107, the sleeve 107 moves up and down without self-rotation, so that the plurality of sliding pins 110 keep moving up and down, thereby driving the rotating drum 103 and the baffle 104 to accurately rotate a specified angle.

[0041] Further, the trigger mechanism includes a fixed cylinder 201 fixed at the lower end of the slide plate 4, a micro switch 202 is installed at the inner upper end of the fixed cylinder 201, and a connecting plate 203 is movably provided on the inner side of the fixed cylinder 201, a lower pull rod 204 extending to the outer side of the tension cylinder 1 is fixed at the lower end of the connecting plate 203, and the lower end of the lower pull rod 204 is connected to a thread fixing mechanism located above, and the micro switch 202 is electrically connected to the electromagnet 108 through the control circuit;

[0042] Through the trigger mechanism, when the core wire and the surface wire of the steel cord break through the maximum static friction force, that is, the moment when the two produce relative sliding, the electromagnet 108 of the steering mechanism can be immediately controlled to be energized to generate electromagnetic attraction, so that multiple through holes 5 can be quickly blocked to prevent the slide plate 4 and the upper pull rod 3 from moving up and down.

[0043] Furthermore, the one-way locking mechanism includes a cross bar 405 fixed to the upper end of the outer side of the upper pull rod 3 and two thrust mechanisms symmetrically arranged on both sides of the upper end of the tension cylinder 1. Two racks 406 are symmetrically fixed at both ends of the cross bar 405. The thrust mechanism includes a fixed shaft 401 fixed to the upper end of the outer side of the tension cylinder 1. The outer side of the fixed shaft 401 is rotatably connected to a plurality of push rods 402 of unequal length (combined with Figure 2 and Figure 3 ), one side of each push rod 402 is elastically connected to the outer side of the tension cylinder 1 through a push rod spring 404, and one end of each push rod 402 is provided with a locking tooth 403 that can engage with the triangular tooth on the rack 406, and the length difference between each two adjacent push rods 402 is equal;

[0044] When the rack 406 moves downward, the locking teeth 403 at one end of the push rod 402 can slide along the surface of multiple triangular teeth on one side of the rack 406. After each locking tooth 403 slides over the top of the triangular tooth, the push rod spring 404 at the corresponding position pushes the corresponding push rod 402 to rotate toward the side of the rack 406, so that the corresponding locking tooth 403 slides to the root of the triangular tooth. When the rack 406 moves upward in the opposite direction, the locking teeth 403 can engage with the triangular teeth on one side of the rack 406, thereby playing a one-way locking role. Therefore, it can further prevent the upper pull rod 3 from moving upward when the core line and the surface line break through the maximum static friction force, thereby further improving the detection accuracy of the extraction force.

[0045] The multiple push rods 402 in the thrust mechanism are of different lengths, and an equal length difference is maintained between every two adjacent push rods 402. Therefore, when the rack 406 moves downward by a triangular tooth stroke, the multiple locking teeth 403 slide from the top of the triangular tooth to the root in turn. After each locking tooth 403 slides to the root of the triangular tooth, the rack 406 can be unidirectionally locked, so that a larger number of push rods 402 can lock the rack 406. Therefore, the rack 406 can maintain a unidirectional locking effect when it moves downward by a smaller stroke, further reducing the rebound distance of the upper pull rod 3 and the slide plate 4, thereby further improving the detection accuracy.

[0046] Furthermore, the thread end fixing mechanism includes a fixing block 301, and one end of the fixing block 301 is provided with a fixing groove 302 (such as Figure 8 As shown), one side of the fixing block 301 is threadedly connected with a clamping stud 303 extending to the inner side of the fixing groove 302;

[0047] Insert one end of a core wire in the middle of the steel cord into the inner side of the fixing groove 302 of the upper wire end fixing mechanism, and insert one end of multiple surface wires on the outer side of the steel cord into the inner side of the fixing groove 302 of the lower wire end fixing mechanism, and then rotate the two clamping studs 303. The two clamping studs 303 clamp and fix one end of the core wire and the surface wire on the inner side of the two fixing grooves 302 respectively.

[0048] Furthermore, it also includes a bottom plate 6 placed on the ground, the bottom plate 6 is fixedly connected to the bottom of the fixed block 301 located below, a fixed frame 8 is fixed to the outside of the tension cylinder 1, two lifting electric cylinders 7 are installed on the upper side of the bottom plate 6, the telescopic ends of the two lifting electric cylinders 7 are fixedly connected to the outside of the fixed frame 8, a measuring cylinder 9 is fixed to the upper end of the inner side of the fixed frame 8, a suspension rod 10 is fixed to the upper end of the upper pull rod 3, a pointer plate 11 slidably connected to the inner side of the measuring cylinder 9 is fixed to the upper end of the suspension rod 10, a pointer 12 is arranged on the outer side of the pointer plate 11, an observation groove 13 is arranged on one side of the measuring cylinder 9, and a scale line 14 is arranged on the outer side of the measuring cylinder 9 at the position of the observation groove 13;

[0049] The telescopic ends of the two lifting electric cylinders 7 are controlled to extend synchronously, thereby driving the bottom plate 6 and the fixed frame 8 to separate from each other, so that the two thread end fixing mechanisms are separated from each other, and the two thread end fixing mechanisms apply tension to the core wire and the surface wire of the steel cord respectively, and the core wire of the steel cord applies a reverse force to the two thread end fixing mechanisms, so that the tension spring 2 can be stretched, and at the same time, the upper thread end fixing mechanism can pull the lower pull rod 204 of the trigger mechanism, and the lower pull rod 204 applies a downward pulling force to the fixed cylinder 201 through the connecting plate 203, and the fixed cylinder 201 The pulling force is transmitted to the slide plate 4, thereby driving the slide plate 4 to move downward along the inner side of the tension cylinder 1. When the slide plate 4 moves downward, the upper pull rod 3 can drive the suspension rod 10 and the pointer plate 11 to move downward synchronously. The pointer plate 11 drives the pointer 12 on its outer side to move up and down. The pointer 12 can be aligned with the scale lines 14 at different heights to indicate the current reading. Therefore, the pulling force applied by the tension spring 2 to the steel cord can be tested. When the core wire of the steel cord is separated from the surface wire, the extraction force of the core wire of the steel cord can be judged by observing the reading indicated by the pointer 12 at the moment.

[0050] Working principle: When testing the steel cord, one end of a core wire in the middle of the steel cord is inserted into the inner side of the fixing groove 302 of the upper wire end fixing mechanism, and one end of multiple surface wires on the outer side of the steel cord is inserted into the inner side of the fixing groove 302 of the lower wire end fixing mechanism, and then the two clamping studs 303 are rotated, and the two clamping studs 303 clamp and fix one end of the core wire and the surface wire on the inner side of the two fixing grooves 302 respectively;

[0051] Then, the telescopic ends of the two lifting electric cylinders 7 are controlled to extend synchronously, thereby driving the bottom plate 6 and the fixed frame 8 to separate from each other, so that the two thread end fixing mechanisms are separated from each other, and the two thread end fixing mechanisms apply tension to the core wire and the surface wire of the steel cord respectively, and the core wire of the steel cord applies a reverse force to the two thread end fixing mechanisms, so that the tension spring 2 can be stretched, and at the same time, the upper thread end fixing mechanism can pull the lower pull rod 204 of the trigger mechanism, and the lower pull rod 204 applies a downward pulling force to the fixed cylinder 201 through the connecting plate 203, and the fixed cylinder 201 transmits the pulling force to the slide plate 4, thereby driving the slide plate 4 to move downward along the inner side of the tension cylinder 1. The inner side of the tension cylinder 1 is pre-filled with oil damping oil. When the slide plate 4 When the inner side of the tension cylinder 1 moves up and down, the damping oil can flow back and forth at both ends of the inner side of the tension cylinder 1 through the multiple through holes 5. When the slide plate 4 moves down, the damping oil at the lower end of the tension cylinder 1 can be squeezed into the upper end space of the tension cylinder 1 through the through holes 5. When the slide plate 4 moves down, the upper pull rod 3 can drive the suspension rod 10 and the pointer plate 11 to move down synchronously. The pointer plate 11 drives the pointer 12 on its outer side to move up and down. The pointer 12 can be aligned with the scale lines 14 at different heights, so as to indicate the current reading. Therefore, the tension applied by the tension spring 2 to the steel cord can be tested. When the core wire of the steel cord is separated from the surface wire, the size of the extraction force of the core wire of the steel cord can be judged by observing the reading indicated by the pointer 12 at the moment when the core wire of the steel cord is separated from the surface wire.

[0052] When tension is applied to the steel cord, the lower pull rod 204 of the trigger mechanism is subjected to the downward pulling force from the thread end fixing mechanism, and the lower pull rod 204 applies a downward pulling force to the connecting plate 203, so that the connecting plate 203 is not in contact with the micro switch 202. As the telescopic ends of the two lifting electric cylinders 7 continue to extend, the tension spring 2 is further stretched, thereby further increasing the tension on the steel cord. When the core wire and the surface wire of the steel cord break through the maximum static friction force, relative sliding will occur between the core wire and the surface wire. The maximum static friction force is the extraction force of the core wire of the steel cord. Due to the moment when the core wire and the surface wire slide relative to each other, the static friction between the two instantly changes to The sliding friction between the two is formed, and the sliding friction between the two is less than the maximum static friction. Therefore, the moment the two become sliding friction, the reaction force on the tension spring 2 will be instantly reduced, so that the stretched length of the tension spring 2 will be instantly shortened, so that the lower pull rod 204 drives the connecting plate 203 to instantly move a smaller stroke in the direction of the micro switch 202 until the micro switch 202 is triggered. After the micro switch 202 is triggered, the control circuit controls the electromagnet 108 of the steering mechanism to be energized and generate electromagnetic attraction to the sliding sleeve 107. After the sliding sleeve 107 is attracted, it will move in the direction of the electromagnet 108 and compress the return spring 109. 07 At the same time, it drives multiple sliding pins 110 on the outside to move downward, and each sliding pin 110 can be movably matched with the inner side of the guide groove 106 at the corresponding position. The sliding pin 110 slides from a vertical sliding groove 1061 at the upper end to the inner side of the spiral inclined groove 1062, and then slides along the inner side of the spiral inclined groove 1062 to the inner side of a vertical sliding groove 1061 at the lower end. When the sliding pin 110 slides on the inner side of the spiral inclined groove 1062, a certain steering torque can be applied to the rotating drum 103 through the spiral inclined groove 1062, thereby driving the rotating drum 103 to rotate a certain angle, and the rotating drum 103 drives the baffle 104 to rotate a certain angle until each circular hole 10 5 is misaligned with each through hole 5 at the corresponding position, so that each through hole 5 is blocked by the blocking piece 104. At this time, the damping oil on both sides of the slide plate 4 inside the tension cylinder 1 can be cut off, so that the damping oil at both ends of the tension cylinder 1 cannot flow to each other, so that the slide plate 4 cannot move up and down along the inner side of the tension cylinder 1, thereby preventing the upper pull rod 3 from moving up and down, thereby preventing the pointer plate 11 and the pointer 12 from moving up and down. Therefore, at the moment when the core line and the surface line break through the maximum static friction force, the rebound of the tension spring 2 can be reduced, thereby reducing the reverse movement stroke of the pointer plate 11, thereby reducing the error between the measured value and the actual value, and improving the detection accuracy;

[0053] In order to further prevent the upper pull rod 3 and the slide plate 4 from rebounding, when tension is applied to the steel cord, the slide plate 4 and the upper pull rod 3 will move downward when subjected to the reaction force of the steel cord, and the upper pull rod 3 drives the cross bar 405 and two racks 406 of the one-way locking mechanism to move downward, and each rack 406 corresponds to the thrust mechanism on the outer side of the upper pull rod 3. When the rack 406 moves downward, the locking teeth 403 at one end of the push rod 402 can slide along the surface of multiple triangular teeth on one side of the rack 406. When the rack 406 moves upward in the opposite direction, the locking teeth 403 can engage with the triangular teeth on one side of the rack 406, thereby playing a one-way locking role. Therefore, it can further prevent the upper pull rod 3 from moving upward when the core line and the surface line break through the maximum static friction force, thereby further improving the detection accuracy of the extraction force.

[0054] Since the multiple push rods 402 in the thrust mechanism are of different lengths and an equal length difference is maintained between each two adjacent push rods 402, when the rack 406 moves downward by a triangular tooth stroke, a greater number of locking teeth 403 will engage with the same triangular tooth in turn, so that a greater number of push rods 402 will lock the rack 406. Therefore, the rack 406 can maintain a one-way locking effect when it moves downward by a smaller stroke, further reducing the rebound distance of the upper pull rod 3 and the slide plate 4, thereby further improving the detection accuracy.

[0055] The above description enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A steel cord core strand extraction force detection device, comprising a tension cylinder filled with a tension spring connected to the lower end, characterized in that: Also includes: Two thread end fixing mechanisms are symmetrically arranged in an upper and lower manner, wherein the thread end fixing mechanism located in the upper portion is connected to one end of the tension spring; The inner side of the tension cylinder is slidably connected with a slide plate, the upper end of the slide plate is fixed with an upper pull rod extending to the outer side of the tension cylinder, and a plurality of through holes are opened at the edge of the slide plate, a non-return mechanism is arranged inside the slide plate, and a one-way locking mechanism is arranged between the upper end of the upper pull rod and the outer side of the tension cylinder; The non-return mechanism comprises a central cavity and a baffle groove provided inside the slide plate, a rotating drum is rotatably connected to the inner side of the central cavity, a baffle movably connected to the inner side of the baffle groove is fixed to the outer side of the rotating drum, a plurality of circular holes corresponding to each through hole are provided on the baffle, a steering mechanism is provided between the rotating drum and the central cavity, and the lower end of the slide plate is connected to a thread fixing mechanism above through a trigger mechanism; The steering mechanism comprises a plurality of guide grooves arranged on the outer side of the rotating drum and a sliding sleeve movably arranged at the upper end of the inner side of the central cavity, wherein a sliding pin is rotatably connected to the outer side of the sliding sleeve at a position corresponding to each guide groove, and each sliding pin is movably connected to the inner side of the guide groove at a corresponding position, and an electromagnet is installed at the lower end of the inner side of the central cavity, and the upper end of the electromagnet is elastically connected to the lower end of the sliding sleeve through a return spring; The guide groove comprises two vertical slide grooves and a spiral chute opened on the outside of the drum, and the two ends of the spiral chute are smoothly connected to one end of the two vertical slide grooves respectively; The trigger mechanism includes a fixed cylinder fixed at the lower end of the slide plate, a micro switch is installed at the inner upper end of the fixed cylinder, and a connecting plate is movably arranged on the inner side of the fixed cylinder, a lower pull rod extending to the outside of the tension cylinder is fixed at the lower end of the connecting plate, the lower end of the lower pull rod is connected to a wire end fixing mechanism located above, and the micro switch is electrically connected to the electromagnet through a control circuit.

2. The steel cord core strand extraction force detection device according to claim 1, characterized in that: A spline shaft is fixed on the inner upper end of the central cavity and located inside the rotating drum, and the sliding sleeve is slidably sleeved on the outer side of the spline shaft.

3. The steel cord core strand extraction force detection device according to claim 1, characterized in that: The one-way locking mechanism comprises a cross bar fixed to the upper end of the outer side of the upper pull rod and two thrust mechanisms symmetrically arranged on both sides of the upper end of the tension cylinder. Two racks are symmetrically fixed at both ends of the cross bar.

4. The steel cord core strand extraction force detection device according to claim 3, characterized in that: The thrust mechanism includes a fixed shaft fixed to the upper end of the outer side of the tension cylinder, and the outer side of the fixed shaft is rotatably connected to a plurality of push rods of unequal lengths. One side of each push rod is elastically connected to the outer side of the tension cylinder through a push rod spring, and one end of each push rod is provided with locking teeth that engage with the triangular teeth on the rack, and an equal length difference is maintained between each two adjacent push rods.

5. The steel cord core strand extraction force detection device according to claim 1, characterized in that: The thread end fixing mechanism comprises a fixing block, one end of which is provided with a fixing groove, and one side of the fixing block is threadedly connected with a clamping stud extending to the inner side of the fixing groove.

6. The steel cord core strand extraction force detection device according to claim 5, characterized in that: It also includes a base plate placed on the ground, which is fixedly connected to the bottom of the fixed block located below, a fixed frame is fixed to the outside of the tension cylinder, and two lifting electric cylinders are installed on the upper side of the base plate, and the telescopic ends of the two lifting electric cylinders are fixedly connected to the outside of the fixed frame.

7. The steel cord core strand extraction force detection device according to claim 6, characterized in that: A measuring cylinder is fixed to the inner upper end of the fixed frame, a suspension rod is fixed to the upper end of the upper pull rod, a pointer plate slidably connected to the inner side of the measuring cylinder is fixed to the upper end of the suspension rod, a pointer is arranged on the outer side of the pointer plate, an observation groove is arranged on one side of the measuring cylinder, and scale lines are arranged on the outer side of the measuring cylinder at the position of the observation groove.

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