Steel strand twisting on-line detection shutdown device

Abstract

The invention relates to a steel strand twisting on-line detection shutdown device. The device comprises detection mechanisms and a detection ring which are symmetrically arranged; the detection mechanism on each side comprises a mounting bracket, a detection rod and a sensor, the detection rod is rotationally arranged at the upper end of the mounting bracket through a bearing seat, the upper end of the detection rod is sleeved with a swing plate, and a detection ring is inserted between the swing plates on the detection mechanisms on the two sides; the lower end of the detection rod extends downwards to be connected with a detection block. The bearing seat is provided with a stop lever used for limiting the rotation direction of the detection rod. A sensor is arranged on one side of the mounting bracket; a pressure spring is arranged between the sensor and one end of the detection block; the pressure spring drives the other end of the detection block to abut against the stop lever, the broken or skipped steel strand drives the detection block to rotate reversely, the pressure spring is used for pressing the sensor, and the sensor is connected with a control cabinet used for controlling the stranding machine through a wire. The wire jumping and breaking conditions of the steel strand can be effectively detected in real time, the machine is stopped at the first time, the abnormal steel strand is prevented from being conveyed backwards continuously, and therefore the quality of the steel strand is improved.

Description

Technical Field

[0001] This invention relates to the field of strand twisting machine technology, and in particular to an online detection and shutdown device for steel strand twisting. Background Technology

[0002] Twisting machines are used in the production of steel strands. During the production process, due to material factors, process and equipment factors, or other potential causes, wire breakage or skipping inevitably occurs. Wire breakage means that one or more strands in the strand break, and the break is exposed on the surface of the strand. Skipped wire occurs when a strand, although not broken, protrudes from the surface of the strand. Whether it's a broken or skipped wire, the direct manifestation is a protrusion on the surface of the strand, leading to an abnormal diameter of the strand.

[0003] After the steel strands are twisted, they need to be inspected immediately to detect any skipped or broken strands, allowing for timely intervention and ensuring the quality of the steel strands. Existing technology uses specialized equipment for this inspection. One type of equipment uses a beam emitter and receiver to detect broken strands; however, this equipment is only suitable for detecting the breakage of a single steel strand.

[0004] If the beam emitter and receiver are applied to the detection of broken wires in stranded steel wire, the detection accuracy may be low. For example, in a device for online monitoring of broken wires during the production process of steel wire rope disclosed in patent publication number CN214168562U, under normal circumstances, the steel wire rope body blocks the transmission of light signals between the infrared beam emitter and the infrared beam receiver. When a broken wire occurs, the light signal emitted by the infrared beam emitter is transmitted to the infrared beam receiver.

[0005] The above-disclosed patents are applied to the monitoring of broken wires in twisted steel wire ropes. However, it should be noted that in most cases of broken wires in twisted steel wire ropes, only one or a few wires break, while the remaining wires maintain structural integrity. The occurrence of a complete strand breaking is extremely rare. Furthermore, the beam emitted by the beam emitter may still be blocked by the steel strand, making it difficult for the receiver to detect changes in light intensity. Therefore, it is difficult to detect broken wires. The above detection equipment has certain limitations in its application. Summary of the Invention

[0006] To address the problem that some testing equipment struggles to accurately determine whether a steel strand has broken wires, this invention provides an online detection and shutdown device for steel strand twisting. Rotatable detection rods are arranged on both sides of the steel strand, with a detection ring positioned between the rods. The detection ring is fitted onto the steel strand. If a wire breaks or the diameter of the steel strand increases, the detection ring will move, causing the detection rods to deflect. This allows for online, real-time, and effective detection of broken and skipped wires.

[0007] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0008] A steel strand twisting online inspection and shutdown device includes inspection mechanisms symmetrically arranged on both sides of the steel strand running direction and an inspection ring arranged between the two inspection mechanisms and sleeved on the steel strand.

[0009] The detection mechanism on each side includes a mounting bracket, a detection rod, and a sensor. The upper end of the mounting bracket is rotatably connected to the detection rod via a bearing seat, which facilitates the free rotation of the detection rod. The detection rod is vertically arranged, and a swing plate is sleeved on the upper end of the detection rod, which facilitates the rotation of the swing plate together. The swing plates on the two sides of the detection mechanism are arranged opposite to each other and the detection ring is inserted between them. The insertion method facilitates the removal and placement of the detection ring.

[0010] The lower end of the detection rod extends downward and is connected to a detection block. The detection block rotates together with the detection rod. A stop bar is provided on the bearing seat to limit the rotation direction of the detection rod. The sensor is provided on one side of the mounting bracket, and a compression spring is provided between the sensor and one end of the detection block.

[0011] The compression spring drives the detection block to rotate forward, and the other end of the detection block abuts against the stop bar. A broken or skipped strand of the steel strand drives the detection block to rotate in reverse, and the compression spring presses the sensor. The sensor is connected to the control cabinet for controlling the twisting machine through a wire. The control cabinet controls the twisting machine to stop according to the signal output by the sensor.

[0012] Furthermore, the line connecting the two detection mechanisms is perpendicular to the running direction of the steel strand, and there is a horizontal gap between the detection mechanism and the steel strand to avoid affecting the operation of the steel strand. The steel strand is arranged above the two detection mechanisms.

[0013] Furthermore, the mounting bracket is a plate with bent ends. Both the upper and lower ends of the mounting bracket are horizontally arranged. A protective shell is screwed to the bent part of the upper end of the mounting bracket. The protective shell houses the bearing seat, detection block, sensor, and compression spring cover, which improves the neatness of the appearance of the detection mechanism and facilitates the protection of each component.

[0014] Furthermore, the bearing housing is arranged on the lower surface of the upper end of the mounting bracket. The bearing housing has a "U" shaped cross section and an outward flange at the upper end. The outward flange is bolted to the mounting bracket, which facilitates the disassembly and assembly of the bearing housing. A rolling bearing is installed inside the bearing housing, which improves the smoothness of the rotation of the detection rod.

[0015] Furthermore, the detection rod is a stepped rod structure, with the detection rod vertically penetrating the bearing seat. The upper end of the detection rod is prismatic, and the upper end of the detection rod passes through the bearing seat and is connected to the swing plate. The swing plate facilitates the rotation of the detection rod. The swing plate is a long plate, and one end of the swing plate is a swing sleeve with a prismatic inner wall. The swing sleeve is fitted onto the upper end of the detection rod.

[0016] Furthermore, the other end of the swing plate is provided with an insertion hole, and the detection ring is a ring-shaped body with a circular middle and straight ends formed by bending steel wire. The end of the detection ring extends outward in a straight line and is inserted into the insertion hole.

[0017] Furthermore, the distance between the central ring of the detection circle and the steel strand is 2mm to 5mm.

[0018] Furthermore, after the lower end of the detection rod passes through the bearing seat, it is threadedly connected to the detection block and the locking nut in sequence. The detection block has a cross-section in the shape of "𠃊", the two ends of the detection block are perpendicular to each other, and the bent part of the detection block is annular and threadedly connected to the detection rod.

[0019] An anti-loosening washer is fitted on the detection rod between the detection block and the locking nut, and a flat bearing is fitted on the detection rod between the detection block and the bearing seat.

[0020] Furthermore, the two ends of the detection block are a limiting end and a detection end, respectively. The compression spring drives the limiting end to abut against the stop rod. The stop rod is vertically arranged, and the upper end of the stop rod is threadedly connected to the bearing seat.

[0021] The detection end is provided with a locking post, and the compression spring is arranged between the locking post and the sensor to facilitate the installation of the compression spring and prevent it from falling off. The sensor is a force sensor.

[0022] The beneficial effects of the present invention through the above technical solution are:

[0023] This invention features a rational structural design, utilizing two detection mechanisms to connect the detection rings. The detection rings are fitted onto the running steel strands. Under normal operating conditions, the steel strands do not contact the detection rings. Only when a strand breaks or skips a wire, preventing it from passing through the detection rings, will the strand contact them and cause the detection rings to move. This movement triggers the detection mechanisms, which detect the abnormality in the steel strands and promptly stop the machine, facilitating timely handling by personnel.

[0024] The detection rod of this invention is rotatable. The detection ring drives the swing plate to deflect, which in turn causes the detection rod to rotate. Therefore, the external force causing the detection rod to rotate is the abnormally diameter steel strand. Under normal conditions, the compression spring drives the detection rod to rotate forward, and the detection rod is restricted by the stop bar. The swing plates at the upper ends of the two detection rods are opposite each other, which facilitates the installation of the detection ring. Only when the abnormally diameter steel strand causes the detection rod to rotate in reverse, compressing the compression spring and prompting the sensor to detect the signal change, thereby controlling the stranding machine to stop via the control cabinet.

[0025] This invention detects broken or skipped strands in steel strands by compressing a spring due to abnormal diameter, which triggers an increase in pressure signal detected by a sensor. A detection loop is positioned around the circumference of the steel strand, maintaining a uniform gap, allowing for comprehensive detection of abnormal strands. The optimized detection method is more sensitive and reliable, enabling immediate shutdown in case of any issues, ensuring that problematic strands are not further fed into the system. Attached Figure Description

[0026] Figure 1 This is a top view of an online detection and shutdown device for steel strand twisting according to the present invention. In the figure, arrow A points to the direction of steel strand running, and arrow B points to the direction of reversal of the detection rod.

[0027] Figure 2 This is a front view of an online detection and shutdown device for steel strand twisting according to the present invention, in which a protective shell is shown in cross section.

[0028] Figure 3 This is a bottom view of an online detection and shutdown device for steel strand twisting according to the present invention. The protective shell is not shown in the figure. Arrow A in the figure indicates the running direction of the steel strand, and arrow B indicates the reversing direction of the detection rod.

[0029] Figure 4 This is a cross-sectional view of the detection mechanism of an online detection and shutdown device for steel strand twisting according to the present invention.

[0030] Figure 5 This is a schematic diagram showing the disassembled detection mechanism of an online detection and shutdown device for steel strand twisting according to the present invention.

[0031] Figure 6 This is a bottom view of the detection mechanism on the right side of the online detection and shutdown device for steel strand twisting according to the present invention. The compression spring is not shown in the figure.

[0032] The attached diagram is labeled as follows: 1. Detection mechanism, 2. Detection ring, 3. Mounting bracket, 4. Detection rod, 41. Prismatic section, 42. Optical axis section, 43. Threaded section, 5. Sensor, 6. Reinforcing plate, 7. Protective shell, 8. Outer flange, 9. Bearing seat, 10. Rolling bearing, 11. Swing plate, 12. Swing sleeve, 13. Insertion hole, 14. Detection block, 141. Limiting end, 142. Detection end, 15. Planar bearing, 16. Locking nut, 17. Stop bar, 18. Compression spring, 19. Locking post, 20. Fixing bolt, 21. Fixing nut. Detailed Implementation

[0033] The specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings:

[0034] like Figures 1-6 As shown, an online inspection and shutdown device for steel strand twisting includes inspection mechanisms 1 symmetrically arranged on both sides of the steel strand's running direction, and an inspection ring 2 arranged between the two inspection mechanisms 1 and fitted onto the steel strand. The line connecting the two inspection mechanisms 1 is perpendicular to the steel strand's running direction. There is a gap between the inspection mechanisms 1 and the steel strand, which does not affect the normal operation of the steel strand. The steel strand is arranged above the two inspection mechanisms 1.

[0035] When installing the inspection mechanism 1, it can be installed between the stranding machine and the straightener. In this way, after the steel strand exits the stranding machine, the inspection mechanism 1, in conjunction with the inspection ring 2, can promptly detect broken or skipped wires in the steel strand; and by performing the inspection before the straightener, it can prevent abnormal steel strands from entering the straightener.

[0036] Each side of the detection mechanism 1 includes a mounting bracket 3, a detection rod 4, and a sensor 5. The mounting bracket 3 has a cross-section in the shape of "[", and is a plate with bent ends. Both the upper and lower ends of the mounting bracket 3 are horizontally arranged, with the upper end being longer than the lower end. A reinforcing plate 6 is provided at the lower bend of the mounting bracket 3; a protective shell 7 is also screwed to the upper bend of the mounting bracket 3. The protective shell 7 can be used to cover some components, improving the neatness of the appearance of the detection mechanism 1.

[0037] The upper end of the mounting bracket 3 is rotatably connected to the detection rod 4 via the bearing seat 9, allowing the detection rod 4 to rotate horizontally relative to the mounting bracket 3. The bearing seat 9 has a "U"-shaped cross-section and is mounted on the lower surface of the upper end of the mounting bracket 3. Specifically, the upper end of the bearing seat 9 has an outward flange 8, which is bolted to the mounting bracket 3 for easy assembly and disassembly of the bearing seat 9. A rolling bearing 10 is installed inside the bearing seat 9. Due to the constraints imposed by the bearing seat 9 and the upper end of the mounting bracket 3, the rolling bearing 10 is difficult to move axially.

[0038] The detection rod 4 has a stepped rod structure, comprising an integrally formed prism section 41, a smooth shaft section 42, and a threaded section 43. The detection rod 4 is vertically positioned, penetrating the bearing housing 9. The smooth shaft section 42 of the detection rod 4 passes through the rolling bearing 10, and a shoulder of the detection rod 4 abuts against the inner ring of the rolling bearing 10, restricting its downward movement. Thus, the detection rod 4 can rotate freely under the action of the bearing housing 9.

[0039] The upper end of the detection rod 4 is prismatic, and a swing plate 11 is fitted onto the upper end of the detection rod 4. That is, the upper end of the detection rod 4 passes through the bearing seat 9 and is connected to the swing plate 11, which is plugged into and detached from the detection rod 4. Specifically, the swing plate 11 is a long plate, one end of which is a swing sleeve 12 with a prismatic inner wall. The swing sleeve 12 is fitted onto the prismatic section 41 at the upper end of the detection rod 4, and the other end of the swing plate 11 is close to the steel strand.

[0040] The swing plate 11 can be directly removed and placed from the detection rod 4 by a person. When the swing plate 11 is subjected to force and deflects, it will drive the detection rod 4 to rotate horizontally. The external force driving the swing plate 11 is the detection ring 2. The swing plates 11 on both sides of the detection mechanism 1 are arranged opposite each other and the detection ring 2 is inserted between them, which facilitates the removal and placement of the detection ring 2.

[0041] In this embodiment, the detection ring 2 is a loop formed by bending a steel wire, with a circular center and straight ends. The detection ring 2 is fitted onto the steel strand. A steel wire that can be bent arbitrarily and retain its shape after bending is selected; galvanized steel wire can be chosen here. The middle of a steel wire is aligned with the steel strand and bent into a loop, then the wire is fitted onto the steel strand, with both ends remaining straight, thus forming the detection ring 2. The detection ring 2 should maintain a uniform gap with the circumference of the steel strand. Here, the distance between the detection ring 2 and the steel strand is 2mm~5mm, allowing the steel strand to slightly sway within the range of the detection ring 2 without touching it. It will only touch the detection ring 2 if the diameter of the steel strand is abnormal.

[0042] When installing the detection ring 2, an insertion hole 13 is provided at the other end of the swing plate 11. The end of the detection ring 2 extends outward in a straight line and is inserted into the insertion hole 13, allowing the detection ring 2 to be installed between the swing plates 11 of the two detection mechanisms 1, ensuring that the detection ring 2 is fixed between the two swing plates 11. When the diameter of the steel strand increases due to broken or skipped wires, the abnormal diameter steel strand will be directly detected by the detection ring 2: when the steel strand moves in a straight line, the abnormal diameter position touches the detection ring 2, causing the detection ring 2 to also move in a straight line. Once the detection ring 2 moves, it triggers the action of the detection mechanism 1, driving the swing plate 11 to rotate. The swing plate 11 will then drive the detection rod 4 to rotate simultaneously, thereby achieving online and timely detection of abnormal steel strands. Even if the steel strand causes both ends of the detection ring 2 to disengage from the insertion hole 13, the detection rod 4 has already rotated.

[0043] The lower end of the detection rod 4 extends downward and is connected to the detection block 14. That is, the lower end of the detection rod 4 passes through the bearing seat 9 and is threadedly connected to the detection block 14. When the detection rod 4 rotates, the detection block 14 rotates with it. The cross-section of the detection block 14 is "U" shaped, and the two ends of the detection block 14 are perpendicular to each other. The two ends of the detection block 14 are the limiting end 141 and the detection end 142, respectively. The bent part of the detection block 14 is annular and threadedly connected to the detection rod 4, so that the detection block 14 can be installed on the detection rod 4.

[0044] To improve the smoothness of the rotation of the detection rod 4, a flat bearing 15 is fitted onto the detection rod 4 between the detection block 14 and the bearing seat 9. After the detection block 14 is tightened, the flat bearing 15 is clamped by the detection block 14 and the bearing seat 9, which still ensures the free rotation of the detection rod 4.

[0045] To prevent the detection block 14 from loosening, the lower end of the detection rod 4 passes through the bearing seat 9 and is threaded with a locking nut 16. The detection block 14 and the locking nut 16 are arranged sequentially on the threaded section 43. An anti-loosening washer is fitted on the detection rod 4 between the detection block 14 and the locking nut 16 to ensure the stability of the installation of the detection block 14.

[0046] A stop bar 17 is provided on the bearing housing 9 to limit the rotation direction of the detection rod 4. The stop bar 17 is a cylindrical rod, vertically arranged, and its upper end is threaded to the bearing housing 9. The stop bar 17 cooperates with the detection block 14, thereby limiting the rotation direction of the detection rod 4. When the other end of the detection block 14 abuts against the stop bar 17, the detection rod 4 cannot continue to rotate forward. The detection rod 4 can rotate in reverse, but this rotation is also limited by the sensor 5.

[0047] In this embodiment, a sensor 5 is provided on one side of the mounting bracket 3. Here, the sensor 5 is a force sensor 5, specifically the LH-Z10C miniature force sensor produced by Liheng Sensing. A compression spring 18 is provided between the sensor 5 and one end of the detection block 14. That is, a cylindrical retaining post 19 is provided on the detection end 142 of the detection block 14, and the compression spring 18 is arranged between the retaining post 19 and the sensor 5.

[0048] The compression spring 18 applies external force to both the sensor 5 and the detection block 14. Therefore, the compression spring 18 drives the detection block 14 to rotate clockwise, with the other end of the detection block 14 abutting against the stop rod 17. In other words, under the force of the compression spring 18, the limiting end 141 is driven to abut against the stop rod 17. When the detection rod 4 is reversed by external force, the compression spring 18 is compressed and transmits pressure to the sensor 5. Specifically, the broken or skipped strands of the steel strand drive the detection block 14 to rotate counterclockwise, and the compression spring 18 presses against the sensor 5, causing the sensor 5 to sense an increase in pressure signal. The sensor 5 is connected to the control cabinet used to control the twisting machine via wires.

[0049] The principle of this invention is as follows: In the initial state, the compression spring 18 pushes the detection block 14 to rotate forward and abut against the stop rod 17. At this time, the swing plates 11 on both sides of the detection mechanism 1 are arranged opposite each other and in a straight line. The protective shell 7 covers the bearing seat 9, the plane bearing 15, the detection block 14, the stop rod 17, the sensor 5, and the compression spring 18, preventing the various components at the lower end of the detection rod 4 from being exposed.

[0050] When the swing plates 11 of the two detection mechanisms 1 are arranged opposite each other and in a straight line, the steel wire is manually bent to form a detection ring 2 according to the diameter of the steel strand, and the detection ring 2 is placed on the steel strand, with both ends of the detection ring 2 inserted into the swing plates 11 on both sides. As a result, during the process of the steel strand leaving the twisting machine and running into the straightener, the steel strand moves horizontally forward in a straight line. If there is a broken wire or a skipped wire, the surface of the steel strand will bulge and the diameter will increase. The steel strand will still move forward, and then the steel strand will come into contact with the detection ring 2, causing the detection ring 2 to move forward, and the detection ring 2 will wobble.

[0051] The detection mechanism 1 on either side can detect the sway of the detection ring 2. After the detection ring 2 sways, it first drives the swing plate 11 to reverse, and the detection rod 4 and the detection block 14 to reverse simultaneously. The reversed detection block 14 causes the compression spring 18 to compress, increasing the pressure applied by the compression spring 18 to the sensor 5. Since the sensor 5 is connected to the control cabinet of the twisting machine, which is actually a PLC control cabinet, the PLC control cabinet integrates circuit breakers, PLC controllers, DC power supplies, relays, terminals, etc., and can complete equipment automation and process automation control. The circuit breaker serves as the main power switch of the control cabinet, providing short-circuit and overload protection. The circuit breaker is directly connected to the three-phase main power supply line of the workshop and is the main power input for all circuits in the cabinet. The PLC controller is an OMRON CH200 series programmable logic controller. The sensor 5 is connected to this PLC controller, which performs scanning calculations according to the preset twisting process program and issues control commands. The DC power supply provides a clean and reliable working power for the PLC controller, relays, and other low-voltage electronic components. The relay receives signals from the PLC controller and directly controls the start and stop of multiple motors in the stranding machine, thereby controlling the operation of the stranding machine. Therefore, the pressure signal from sensor 5 is transmitted to the control cabinet, which immediately stops the stranding machine according to the settings. Afterward, the steel strand stops running, and manual handling of broken or skipped strands is possible.

[0052] To optimize the product structure and prevent accidental contact with the swing plates 11 during the placement and removal of the detection ring 2 between the two swing plates 11, which could cause the swing plates 11 to rotate and trigger the sensor 5 to detect a change in pressure signal, resulting in a shutdown, a fixing nut 21 with a fixing bolt 20 is provided on the upper end of the mounting bracket 3. The fixing nut 21 is fixedly mounted on the mounting bracket 3, and the fixing bolt 20 is internally threaded onto the fixing nut 21. Tightening the fixing bolt 20 makes it press tightly against the swing sleeve 12, thereby restricting the rotation of the swing sleeve 12.

[0053] During the process of taking and placing the detection ring 2, the fixing bolt 20 can be tightened to temporarily fix the swing sleeve 12. When the detection ring 2 is in normal operation, the fixing bolt 20 can be loosened to no longer restrict the swing sleeve 12, ensuring that the detection rod 4 can rotate freely.

[0054] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Therefore, all equivalent changes or modifications made to the structure, features and principles described in the claims of the present invention should be included within the scope of the present invention.

Claims

1. A steel strand twisting on-line detection shutdown device, characterized in that, The detection mechanism (1) is symmetrically arranged on both sides of the steel strand running direction, and the detection ring (2) is arranged between the two detection mechanisms (1) and sleeved on the steel strand. The detection mechanism (1) on each side comprises a mounting bracket (3), a detection rod (4) and a sensor (5), the upper end of the mounting bracket (3) is rotatably connected with the detection rod (4) through a bearing seat (9), the detection rod (4) is vertically arranged, the upper end of the detection rod (4) is sleeved with a swing plate (11), the swing plates (11) on the two detection mechanisms (1) are oppositely arranged and the detection ring (2) is inserted therebetween. The lower end of the detection rod (4) is connected with a detection block (14) extending downward, the bearing seat (9) is provided with a stop rod (17) for limiting the rotating direction of the detection rod (4); the sensor (5) is arranged on one side of the mounting bracket (3), and a compression spring (18) is arranged between the sensor (5) and one end of the detection block (14). The compression spring (18) drives the detection block (14) to rotate forward, the other end of the detection block (14) abuts against the stop rod (17), the steel strand with broken or missing wires drives the detection block (14) to rotate reversely, and the sensor (5) is pressed by the compression spring (18), the sensor (5) is connected with a control cabinet for controlling the stranding machine through a wire.

2. A steel strand twisting on-line detection shutdown device according to claim 1, characterized in that, The connecting line between the two detection mechanisms (1) is perpendicular to the running direction of the steel strand, there is a horizontal interval between the detection mechanism (1) and the steel strand, and the steel strand is arranged between the two detection mechanisms (1) above.

3. A steel strand twisting on-line detection shutdown device according to claim 1, characterized in that, The mounting bracket (3) is a plate body with both ends bent, the upper end and the lower end of the mounting bracket (3) are horizontally arranged, the upper end of the mounting bracket (3) is further screw-connected with a protective shell (7) at the bent portion, and the protective shell (7) covers the bearing seat (9), the detection block (14), the sensor (5) and the compression spring (18) inside.

4. A steel strand twisting on-line detection shutdown device according to claim 1, characterized in that, The bearing seat (9) is arranged on the lower surface of the upper end of the mounting bracket (3), the cross section of the bearing seat (9) is "N" shape, the upper end of the bearing seat (9) is provided with an outward flange (8), the outward flange (8) is screw-connected with the mounting bracket (3), and the bearing seat (9) is provided with a rolling bearing (10) inside.

5. A steel strand twisting on-line detection shutdown device according to claim 1, characterized in that, The detection rod (4) is a stepped rod structure, the detection rod (4) vertically penetrates the bearing seat (9), the upper end of the detection rod (4) is prismatic, the detection rod (4) is connected with the swing plate (11) after penetrating the bearing seat (9), the swing plate (11) is a long plate body, one end of the swing plate (11) is a swing sleeve (12) with an inner wall in prismatic shape, and the swing sleeve (12) is sleeved on the upper end of the detection rod (4).

6. A steel strand twisting on-line detection shutdown device according to claim 5, characterized in that, The other end of the swing plate (11) is provided with a insertion hole (13), the detection ring (2) is a ring body with the middle part in annular shape and the two ends in linear shape which is formed by bending a steel wire, the end part of the detection ring (2) extends outward in linear shape and is inserted into the insertion hole (13).

7. A steel strand twisting on-line detection shutdown device according to claim 1, characterized in that, The lower end of the detection rod (4) is screw-connected with the detection block (14) and a locking nut (16) in sequence after penetrating the bearing seat (9), the cross section of the detection block (14) is "∩" shape, the two ends of the detection block (14) are perpendicular, the bent portion of the detection block (14) is annular and screw-connected with the detection rod (4). An anti-loosening washer is fitted on the detection rod (4) between the detection block (14) and the locking nut (16), and a plane bearing (15) is fitted on the detection rod (4) between the detection block (14) and the bearing seat (9).

8. A steel strand twisting on-line detection shutdown device according to claim 7, characterized in that, The detection block (14) has a limiting end (141) and a detection end (142) at its two ends respectively. The compression spring (18) drives the limiting end (141) to abut against the stop rod (17). The stop rod (17) is vertically arranged and the upper end of the stop rod (17) is threadedly connected to the bearing seat (9). A locking post (19) is provided on the detection end (142), and the compression spring (18) is arranged between the locking post (19) and the sensor (5). The sensor (5) is a force sensor.

9. A steel strand twisting on-line detection shutdown device according to claim 6, characterized in that, The distance between the ring in the middle of the detection ring (2) and the steel strand is 2mm~5mm.

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