Device and method for detecting broken wires and strands of elevator wire ropes

Abstract

The present invention discloses a device and method for detecting broken wires and strands of elevator wire ropes, and relates to the technical field of elevator safety detection equipment. The present invention comprises: a fixed frame fixedly arranged on the moving path of the steel rope; a guide wheel rotatably mounted on the fixed frame, the number of which is not less than two; a pulley slidably arranged on the fixed frame and a driving member rotatably mounted on the fixed frame, the driving member is used to drive the pulley to slide, and the number of the pulleys is consistent with the number of steel ropes. The present invention enables the steel rope to pass through the accommodating cavity through the cooperation between the guide wheel and the pulley, thereby obtaining magnetism under the action of the winding, and detecting whether it is defective through the magnetic sensor. Compared with the existing detector of this type, the steel rope can be automatically wound into the accommodating cavity during detection. Therefore, when the device is disassembled and installed as a whole, it will not be blocked by the steel rope itself, which not only facilitates installation, but also facilitates subsequent maintenance.

Description

Technical Field

[0001] The present invention relates to the technical field of elevator safety detection equipment, and in particular to a device and method for detecting broken wires and strands in an elevator wire rope. Background Art

[0002] In modern society, elevators are widely used and are integral to people's daily lives. They have become ubiquitous equipment for transporting people and goods within multi-story buildings, and their safety plays a crucial role. The elevator car and counterweight are connected by a wire rope, which is driven by a traction machine to move the elevator car within the hoistway. As the primary force-bearing and force-transmitting component, the safety of the wire rope has a significant impact on the elevator's operation. Elevator wire ropes are typically made of multiple strands of steel wire. Strand breakage is a major safety concern. Once a strand breaks, it can seriously affect the safety factor of the wire rope. If not detected promptly, the number of broken strands can increase, and the rope may even break, seriously impacting the safe operation of the elevator.

[0003] The traditional method for detecting broken elevator wire ropes relies primarily on regular manual inspections. Manual inspections often rely on visual observation, which is time-consuming and ineffective, especially for high-rise elevators with wire ropes that can be hundreds of meters long. Furthermore, visual inspection alone is difficult to accurately detect. To address this issue, a new detector has emerged on the market that can specifically detect broken wires and strands in wire ropes. This detector utilizes magnetic flux leakage detection technology, magnetizing the wire rope and then using a magnetic sensor to detect the leakage magnetic field to determine whether the material distribution of the wire rope is defective, thereby determining whether the wire is broken. However, the disadvantage of this existing detector is that it is difficult to install. Multiple metal rings are placed around the sides of the wire ropes to magnetize the wire ropes. This requires threading the wire ropes through the rings during installation. If the instrument is damaged, disassembly is also complicated, requiring the metal rings to be broken before it can be removed from the wire rope. Summary of the Invention

[0004] The purpose of the present invention is to solve the problems in the above-mentioned background technology, and to provide a device and method for detecting broken wires and strands in elevator wire ropes.

[0005] In order to achieve the above-mentioned purpose, the present invention specifically adopts the following technical solutions:

[0006] An elevator wire rope broken wire and strand detection device, comprising:

[0007] A fixing frame fixedly arranged on the moving path of the steel cable;

[0008] There are no less than two guide wheels rotatably mounted on the fixing frame;

[0009] A pulley slidably mounted on the fixed frame and a driving member rotatably mounted on the fixed frame, wherein the driving member is used to drive the pulley to slide, and the number of the pulleys is consistent with the number of the steel cables;

[0010] A winding frame fixedly mounted on the fixing frame and a winding wound on the winding frame, wherein the number of the winding frames is consistent with the number of the steel cables, and the winding frame is provided with a receiving groove for receiving a pulley;

[0011] A magnetic sensor is fixedly arranged on the fixing frame, and a processor is configured to be connected to the magnetic sensor signal.

[0012] Furthermore, a sliding frame is slidably provided on the fixed frame, the plurality of rollers are fixed to the sliding frame, and the sliding frame slides under the action of a driving member.

[0013] Furthermore, the driving member includes a first threaded rod rotatably mounted on the fixed frame and threadedly engaged with the sliding frame.

[0014] Furthermore, it also includes a fixing plate that is detachably arranged on the fixing frame, and the plurality of winding frames are all arranged on the fixing plate.

[0015] Furthermore, the fixing plate is fixed to the fixing frame by a bolt assembly.

[0016] Furthermore, a slot is constructed on the fixing plate, and one end of the winding frame is tightly inserted into and fitted into the slot.

[0017] Furthermore, there are two guide wheels, and two sliding rods are slidably provided on the fixed frame. The two guide wheels are respectively rotatably engaged with the two sliding rods. A bidirectional threaded rod is also rotatably installed on the fixed frame, and its two ends are respectively threadedly engaged with the two sliding rods.

[0018] Furthermore, magnetic sensors are provided at least at two locations on the fixing frame, and the magnetic sensors at the two locations face opposite directions.

[0019] Furthermore, it also includes a ring that is movably sleeved on the end of the sliding rod, a pressure plate that matches the ring, and a bolt column that matches the pressure plate. The fixing frame is constructed with a strip hole for the bolt column to pass through, and the pressure plate and the ring are fixed by the bolt column.

[0020] The present invention also provides a method for detecting broken wires and strands in an elevator wire rope, comprising the following steps:

[0021] Fix the fixing frame on the path of the steel cable so that the steel cable passes through the guide wheel, the pulley and then the guide wheel in sequence;

[0022] The pulley is driven by a driving member to move into the receiving groove so that the steel cable passes through the receiving groove;

[0023] The winding is energized to form a stable magnetic field.

[0024] The beneficial effects of the present invention are as follows:

[0025] The present invention enables the steel cable to pass through the accommodating cavity through the cooperation between the guide wheel and the pulley, thereby obtaining magnetism under the action of the winding and detecting whether it has any defects through the magnetic sensor. Compared with the existing detector, the present device allows the steel cable to be automatically wound into the accommodating cavity during detection, so that the steel cable will not be blocked by the steel cable itself when the entire device is disassembled and installed, which not only facilitates installation, but also facilitates subsequent maintenance.

[0026] The present invention uses the bidirectional threaded rod to enable the guide wheels to move closer to or away from each other, thereby facilitating the movement of the pulley and tightening or loosening the steel cable, thereby facilitating corresponding adjustment of the steel cable.

[0027] In the method provided by the present invention, with the cooperation of the device provided by the present invention, the steel rope can be made magnetic without using overly complicated means, and the magnetic field around it can be detected. Therefore, when the leakage magnetic field is detected, it can be determined whether there are defects in the material of the steel rope itself, so as to determine whether the steel rope has broken strands. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a stereogram of the present invention;

[0029] Figure 2 This invention Figure 1 Front view of

[0030] Figure 3 It is a three-dimensional diagram of another viewing angle of the present invention;

[0031] Figure 4 It is a split diagram between the local structures of the present invention;

[0032] Figure 5 This is a split diagram between another local structure of the present invention;

[0033] Figure 6 This is a schematic diagram of the disassembly and assembly between the fixing plate and the winding frame of the present invention;

[0034] Figure 7 It is a split diagram between another local structure of the present invention;

[0035] Figure 8 This is a rendering of the present invention when installed;

[0036] Figure 9 This invention Figure 8Front view of

[0037] Figure numerals: 1, fixed frame; 2, guide wheel; 3, pulley; 4, driving member; 5, winding frame; 6, winding; 7, receiving groove; 8, magnetic sensor; 9, sliding frame; 10, first threaded rod; 11, fixed plate; 12, slot; 13, sliding rod; 14, bidirectional threaded rod; 15, collar; 16, pressure plate; 17, bolt column; 18, strip hole. DETAILED DESCRIPTION

[0038] To make the objectives, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0039] like Figures 1-9 As shown, an embodiment of the present invention provides a device for detecting broken wires and strands of an elevator wire rope, which is mainly used to detect whether a wire or strand of a taut wire rope has broken strands, especially for detecting broken wires of an elevator wire rope. The device includes:

[0040] The fixing frame 1 is fixedly arranged on the moving path of the steel cable. When the whole device is installed, the fixing frame 1 can be directly set at a fixed position. Here, the inspection of the elevator steel cable is taken as an example. The elevator steel cable is mainly driven by the traction machine. The fixing frame 1 can be directly fixed next to the traction machine so that the steel cable can pass directly next to the fixing frame 1.

[0041] The guide wheels 2 are rotatably mounted on the fixed frame 1, and the number of the guide wheels 2 is not less than two. The guide wheels 2 are used to guide the path of the steel cable. The guide wheels 2 are configured with corresponding rolling grooves for placing the steel cable.

[0042] A pulley 3 is slidably mounted on the fixed frame 1, and a driving member 4 is rotatably mounted on the fixed frame 1. The pulley 3 is also used for winding the steel cable. Similar to the function of the guide wheel 2, the steel cable is wound around the circumference of the pulley 3. The driving member 4 is used to drive the pulley 3 to slide. Therefore, the driving member 4 can change the path of the steel cable by changing the position of the pulley 3. The number of the pulleys 3 is consistent with the number of the steel cables. Here, one steel cable corresponds to one pulley 3, and the path of each steel cable is consistent.

[0043] The winding frame 5 fixedly arranged on the fixing frame 1 and the winding 6 wound on the winding frame 5, the winding frame 5 is made of metal, specifically iron, steel or copper, but it is preferably made of a magnetic conductive metal, such as iron, so when the winding 6 is energized, the winding frame 5 will carry a magnetic field, and the number of the winding frames 5 is also consistent with the number of steel cables, and the winding frame 5 is constructed with a receiving groove 7 for accommodating the pulley 3. Since there is a steel cable wound around the pulley 3, when the pulley 3 is located in the receiving groove 7 and when the winding 6 is energized, the steel cable is also located in the magnetic field, so that the steel cable will also be magnetic, and the length direction of the winding 6 here is consistent with the length direction of the two ends of the steel cable located in the receiving groove 7, so the steel cable will carry a magnetic field parallel to its own length direction, and has a magnetic field in two directions;

[0044] A magnetic sensor 8 is fixedly mounted on the fixing frame 1, and a processor is configured to be signal-connected to the magnetic sensor 8. The magnetic sensor 8 is used to sense the magnetic field on the steel cable. The processor is signal-connected to the magnetic sensor 8 and is used to analyze the magnetic field received by the magnetic sensor 8. When the magnetic sensor 8 detects a leakage magnetic field signal, the processor will issue an alarm, thereby notifying the user that a wire or strand of the steel cable has been broken.

[0045] When installing the entire device, first install the fixing frame 1 on the traction machine, specifically it can be directly installed on the floor and fixed by concrete. Figure 9 This is the effect diagram of the entire device during installation. After the fixing frame 1 is installed, the steel cable can pass through the guide wheel 2, the pulley 3 and then the guide wheel 2 in sequence. Then, the pulley 3 is driven by the driving member 4 to move, so that the pulley 3 moves into the accommodation cavity, and the steel cable follows and moves into the accommodation cavity, thus completing the installation of the entire device. During the whole process, there is no need to disassemble the steel cable. The steel cable automatically moves into the accommodation cavity under the drive of the pulley 3, that is, automatically moves to the magnetizing area;

[0046] Compared with the existing detectors, the entire device is installed in conjunction with the steel cable during installation, so the steel cable does not need to be changed, making the entire device very convenient during installation and subsequent maintenance and disassembly without affecting the steel cable.

[0047] like Figure 1-Figure 5As shown, in some embodiments, a sliding frame 9 is slidingly provided on the fixed frame 1. The specific sliding mode of the sliding frame 9 is that a corresponding slider is constructed on the sliding frame 9, and a sliding groove that slides with the slider is constructed on the fixed frame 1. The multiple rollers are fixed to the sliding frame 9, thereby realizing the sliding relationship of the pulley 3 on the fixed frame 1. The sliding frame 9 slides under the action of the driving member 4, so that the sliding relationship of multiple pulleys 3 can be controlled at the same time. Therefore, during installation, multiple pulleys 3 can be slid together at the same time, making the installation process faster, saving installation time, and further simplifying the entire installation process.

[0048] like Figure 2-Figure 4 As shown, in some embodiments, the driving member 4 includes a first threaded rod 10 rotatably mounted on the fixed frame 1, which is threadedly engaged with the sliding frame 9. The end of the first threaded rod 10 is configured with a knob to facilitate its twisting. When the first threaded rod 10 rotates, the sliding frame 9 can be moved through the threaded fitting relationship, thereby moving the multiple pulleys 3 to achieve a driving relationship acting on the pulleys 3.

[0049] like Figure 5 and Figure 6 As shown, in some embodiments, a fixing plate 11 is detachably arranged on the fixing frame 1. When the fixing plate 11 is not disassembled, it is relatively fixed to the fixing frame 1. The plurality of winding frames 5 are arranged on the fixing plate 11, so that the plurality of winding frames 5 are fixed to the fixing frame 1 through the fixing plate 11. When the winding 6 is damaged, the fixing plate 11 can be directly removed from the fixing frame 1, so that the winding 6 is removed, thereby facilitating the replacement of the winding 6 coil, so that there is no need to disassemble the entire device during later maintenance, thereby making the maintenance process more convenient.

[0050] like Figure 5 and Figure 6 As shown, in some embodiments, the fixing plate 11 is fixed to the fixing frame 1 by a bolt assembly. Specifically, a plurality of mounting blocks are constructed on the fixing frame 1, and the fixing plate 11 is fixed to the mounting blocks by bolts, thereby completing the installation and disassembly on the fixing frame 1. The design of the bolt assembly makes the installation and disassembly process of the entire device simple and fast, does not consume much time, and at the same time reduces the cost, which can better achieve economic benefits.

[0051] like Figure 6As shown, in some embodiments, a slot 12 is constructed on the fixing plate 11, and one end of the winding frame 5 is tightly inserted into the slot 12, that is, the winding frame 5 and the fixing plate 11 are fixed to each other by plugging. When the two need to be disassembled, the winding frame 5 can be directly pulled out from the slot 12. Through this design, when one of the coils of the winding 6 is damaged, it is only necessary to pull out the corresponding winding frame 5, so that the winding frame 5 and the winding 6 can be replaced together, and there is no direct impact on the remaining winding frames 5, thereby further reducing the difficulty of maintenance, and also further reducing the cost of maintenance.

[0052] like Figure 1-Figure 4 As shown, in some embodiments, the number of guide wheels 2 is two, and two sliding rods 13 are slidably provided on the fixed frame 1. The ends of the sliding rods 13 are also constructed with sliders, and the fixed frame 1 is also constructed with a sliding groove that slides with the slider, thereby realizing the sliding relationship of the sliding rod 13, and the two guide wheels 2 are respectively rotatably cooperated with the two sliding rods 13, so the two guide wheels 2 can move on the fixed frame 1. A two-way threaded rod 14 is also rotatably installed on the fixed frame 1, and its two ends are respectively threadedly engaged with the two sliding rods 13, so when it rotates, the two sliding rods 13 can be controlled to move closer to or away from each other, thereby bringing the two guide wheels 2 closer to or away from each other. This design makes it possible to control the distance between the two guide wheels 2, thereby facilitating the movement of the pulley 3 between the two guide wheels 2. At the same time, this design can also tighten or loosen the steel cable, making it convenient to adjust the steel cable accordingly when the entire device is installed.

[0053] like Figure 2 As shown, in some embodiments, magnetic sensors 8 are provided at least at two locations on the fixing frame 1, so each steel cable corresponds to two sensors, and the total number of sensors is twice the number of steel cables. The magnetic sensors 8 at the two locations face opposite directions, and the two sensors correspond to the magnetic fields of the steel cables in two directions respectively. By detecting in two opposite directions, the captured magnetic field signal is more comprehensive, thereby reducing the phenomenon of missed detection, making the entire detection process more detailed, and improving the accuracy of detection.

[0054] like Figure 1 and Figure 7As shown, in some embodiments, it also includes a collar 15 movably mounted on the end of the slide rod 13, a pressure plate 16 matched with the collar 15, and a bolt column 17 matched with the pressure plate 16. The collar 15 has a ring opening matched with the end of the slide rod 13, so that it can be mounted on the end of the slide rod 13. The fixing frame 1 is constructed with a strip hole 18 for the bolt column 17 to pass through. The strip hole 18 extends linearly along the moving direction of the slide rod 13, so it has sufficient length. The pressure plate 16 and the collar 15 are fixed by the bolt column 17. Figure 1 As shown in the figure, the end of the collar 15 and the pressure plate 16 are respectively located on both sides of the strip hole 18, and the bolt column 17 passes through the strip hole 18 to fix the collar 15 and the pressure plate 16 together, so that the collar 15 is fixed to the fixing frame 1. This design can increase the firmness of the slide bar 13, thereby increasing the firmness of the guide wheel 2. When the device is installed as a whole, the collar 15 can be directly removed through the bolt column 17, so it does not hinder the overall installation.

[0055] In order to cooperate with the use of the above device, the present invention also provides a method for detecting broken wires and strands in an elevator wire rope in another embodiment. The entire method is coordinated with the device provided in the above embodiment and includes the following steps:

[0056] Fix the fixing frame 1 on the path of the steel cable, so that the steel cable passes through the guide wheel 2, the pulley 3 and then the guide wheel 2. When fixing the fixing frame 1, it can be directly welded to the casing of the traction machine, or it can be fixed to the ground next to the traction machine through concrete;

[0057] The pulley 3 is driven by the driving member 4 to move into the receiving groove 7, thereby moving with the steel cable, so that the steel cable passes through the receiving groove 7 and is located in the receiving groove 7;

[0058] The winding 6 is energized to form a stable magnetic field, so that the steel rope is also in the magnetic field, and the steel rope itself is magnetized, so that it also has a magnetic field. At this time, the magnetic field on the steel rope can be detected by the magnetic sensor 8. When the steel rope has broken wires or broken strands, the material distribution of the steel rope itself is uneven, that is, its own density is uneven, so that the formed magnetic field has unevenness, that is, leakage magnetic field occurs. When the magnetic sensor 8 detects the leakage magnetic field, it can be determined that the steel rope has broken wires or broken strands.

[0059] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one 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 is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An elevator wire rope broken wire and strand detection device, characterized in that: include: A fixing frame (1) fixedly arranged on the moving path of the steel cable; There are no less than two guide wheels (2) rotatably mounted on the fixing frame (1); a pulley (3) slidably arranged on the fixed frame (1) and a driving member (4) rotatably mounted on the fixed frame (1), wherein the driving member (4) is used to drive the pulley (3) to slide, and the number of the pulleys (3) is consistent with the number of the steel cables; A winding frame (5) fixedly arranged on the fixing frame (1) and a winding (6) wound on the winding frame (5), the number of the winding frames (5) being consistent with the number of the steel cables, and a receiving groove (7) for receiving the pulley (3) being constructed on the winding frame (5); a magnetic sensor (8) fixedly mounted on the fixing frame (1) and a processor configured to be signal-connected to the magnetic sensor (8); Magnetic sensors (8) are provided at least at two locations on the fixing frame (1), and the magnetic sensors (8) at the two locations face opposite directions.

2. The elevator wire rope broken wire and strand detection device according to claim 1, characterized in that: A sliding frame (9) is slidably provided on the fixed frame (1), and a plurality of rollers are fixed to the sliding frame (9). The sliding frame (9) slides under the action of the driving member (4).

3. The elevator wire rope broken wire and strand detection device according to claim 2, characterized in that: The driving member (4) comprises a first threaded rod (10) rotatably mounted on the fixed frame (1) and threadedly engaged with the sliding frame (9).

4. The device and method for detecting broken wires and strands of an elevator wire rope according to claim 1, characterized in that: It also includes a fixing plate (11) detachably arranged on the fixing frame (1), and a plurality of winding frames (5) are all arranged on the fixing plate (11).

5. The elevator wire rope broken wire and strand detection device according to claim 4, characterized in that: The fixing plate (11) is fixed to the fixing frame (1) via a bolt assembly.

6. The elevator wire rope broken wire and strand detection device according to claim 4, characterized in that: A slot (12) is constructed on the fixing plate (11), and one end of the winding frame (5) is tightly inserted into and fitted into the slot (12).

7. The elevator wire rope broken wire and strand detection device according to claim 1, characterized in that: There are two guide wheels (2), two slide bars (13) are slidably provided on the fixing frame (1), the two guide wheels (2) are respectively rotatably engaged with the two slide bars (13), and a bidirectional threaded rod (14) is also rotatably installed on the fixing frame (1), the two ends of which are respectively threadedly engaged with the two slide bars (13).

8. The elevator wire rope broken wire and strand detection device according to claim 7, characterized in that: The invention also includes a collar (15) movably sleeved on the end of the slide rod (13), a pressure plate (16) matched with the collar (15), and a bolt column (17) matched with the pressure plate (16); a strip hole (18) for the bolt column (17) to pass through is constructed on the fixing frame (1); the pressure plate (16) and the collar (15) are fixed to each other via the bolt column (17).

9. A method for detecting broken wires and strands in an elevator wire rope, characterized in that: The device for detecting broken wires and strands of an elevator wire rope according to any one of claims 1 to 8 comprises the following steps: Fix the fixing frame (1) on the path of the steel cable so that the steel cable passes through the guide wheel (2), the pulley (3) and then to the guide wheel (2) in sequence; The pulley (3) is driven by the driving member (4) to move into the receiving groove (7), so that the steel cable passes through the receiving groove (7); The winding (6) is energized to form a stable magnetic field.

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