Safety protection device for detecting looseness or breakage of steel wire rope

Abstract

The utility model provides a safety protection device for detecting loosening or breaking of a steel wire rope, which comprises a support, a guide rod and a detection circuit, and the support is arranged on the outer side of a winding drum for winding the steel wire rope; the guide rod is arranged on the side, close to the steel wire rope, of the support, a gap is reserved between the guide rod and the steel wire rope, and the guide rod is made of conductor materials. The loop of the detection circuit comprises a guide rod and a steel wire rope. According to the utility model, a detection circuit is formed by the guide rod, the insulating part and the support which are arranged on the winding drum and are used for winding the lower surface or the side surface of the steel wire rope, and the self-drooping of the steel wire rope after the steel wire rope is loosened on the winding drum is judged by utilizing a low-voltage signal breakover principle so as to solve the problem that the steel wire rope is loosened or broken when the steel wire rope on the steel wire rope winding drum of the hoisting device is loosened or broken; and the detection is difficult, and the requirements of low cost and simple structure are met.

Description

Technical Field

[0001] This utility model relates to the field of wire rope detection technology, and in particular to a safety protection device for detecting slack or broken wire ropes. Background Technology

[0002] Detecting slack or broken wire ropes on hoisting equipment drums is difficult, especially since slack ropes are prone to damage and shorten their lifespan. However, dedicated wire rope slack sensors or online automatic detection systems are too expensive. Therefore, safety protection devices for detecting slack and broken wire ropes need to be cost-effective and simple in structure, while effectively reducing the probability of wire rope damage and ensuring equipment safety.

[0003] It should be noted that the information disclosed in the above background section is only used to enhance the understanding of the background of this utility model and does not constitute any limitation on this utility model. Utility Model Content

[0004] In view of the shortcomings of the prior art described above, this utility model provides a safety protection device for detecting slack or broken wire ropes. The detection circuit is formed by a guide rod, an insulating component, and a support installed on the drum below or to the side of the wire rope. It uses the principle of low-voltage signal conduction to determine the self-sagging of the wire rope after it has slackened on the drum. This solves the problem of difficulty in detecting slack or broken wire ropes on the wire rope drum of the hoisting device, and meets the requirements of low cost and simple structure.

[0005] This utility model provides a safety protection device for detecting slack or broken wire ropes, including a support, a guide rod, and a detection circuit. The support is installed on the outside of the drum on which the wire rope is wound; the guide rod is installed on the support near the wire rope, with a gap between it and the wire rope, and the guide rod is made of a conductor material; the circuit of the detection circuit includes the guide rod and the wire rope.

[0006] In one embodiment of the present invention, the safety protection device further includes an insulating component, which is installed between the guide rod and the support.

[0007] In one embodiment of this utility model, the guide rod is located below or to the side of the drum on which the wire rope is wound.

[0008] In one embodiment of this utility model, the detection circuit uses a low-voltage signal, one end of the detection circuit loop is electrically connected to the guide rod, and the other end is electrically connected to the wire rope.

[0009] In one embodiment of this utility model, the distance between the guide rod and the wire rope is set to 20mm.

[0010] In one embodiment of this utility model, two guide rods are installed on the support, and the distance between the two guide rods is greater than the distance between the guide rods and the wire rope.

[0011] In one embodiment of this utility model, the two guide rods are spaced at the same or different distances from the wire rope.

[0012] In one embodiment of this utility model, the two ends of the detection circuit are electrically connected to two conductor rods respectively.

[0013] In one embodiment of this utility model, a liquid level relay is provided in the detection circuit, and the low water level detection point and the high water level detection point of the liquid level relay are respectively connected to two guide rods.

[0014] In one embodiment of this utility model, the low water level detection point of the liquid level relay is connected to the guide rod closest to the steel wire rope among the two guide rods, and the high water level detection point of the liquid level relay is connected to the remaining guide rod.

[0015] The beneficial effects of this utility model are as follows: A detection circuit formed by guide rods, insulating components, and supports installed on the drum below or to the side of the wound wire rope utilizes the principle of low-voltage signal conduction. A wire is connected to one end of the guide rod, and insulating material is used to insulate the guide rods from each other, creating a gap between the guide rod and the outer diameter of the drum after the wire rope is wound. When the wire rope slackens on the drum and hangs down (or breaks), it touches the guide rod, forming a path and triggering a signal. This signal is then fed back to the control system, enabling the detection of loose rope, tangled rope, and broken rope, effectively protecting the winch equipment. Its structure is simple, installation and maintenance are convenient, and the cost is low. Furthermore, it operates smoothly, has high signal detection sensitivity and good effect, and can detect loose or broken wire ropes along the entire length of the drum, providing a wide detection range.

[0016] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit the present invention. Attached Figure Description

[0017] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments conforming to the present invention and, together with the description, serve to explain the principles of the present invention. Obviously, the drawings described below are merely some embodiments of the present invention, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort. In the drawings:

[0018] Figure 1 This is a schematic diagram of the safety protection device for detecting steel wire ropes according to this utility model.

[0019] In the diagram: 1. Support; 2. Guide rod; 3. Insulating component. Detailed Implementation

[0020] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. It should also be understood that the terminology used in the embodiments of this utility model is for describing specific implementation schemes and not for limiting the scope of protection of this utility model.

[0021] Please see Figure 1 It should be understood that the structures, proportions, sizes, etc., illustrated in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and to facilitate understanding. They are not intended to limit the scope of this invention and therefore have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness or purpose of this invention, should still fall within the scope of the technical content disclosed herein. Furthermore, the terms used in this specification regarding position, quantity, etc., are merely for clarity and not intended to limit the scope of this invention. Changes or adjustments to these relative relationships, without substantially altering the technical content, should also be considered within the scope of this invention's implementation.

[0022] Please see Figure 1 This utility model provides a safety protection device for detecting slack or broken wire ropes, including a support 1, a guide rod 2, and a detection circuit. The support 1 is installed on the outside of the drum where the wire rope is wound; the guide rod 2 is installed on the support 1 near the wire rope, with a gap between it and the wire rope, and the guide rod 2 is made of a conductor material; the detection circuit circuit includes the guide rod 2 and the wire rope. The detection circuit uses a low-voltage signal, with one end of the circuit electrically connected to the guide rod 2 and the other end electrically connected to the wire rope. The safety protection device also includes an insulating component 3, which is installed between the guide rod 2 and the support 1.

[0023] Specifically, in this embodiment of the invention, the support 1 can be installed on the outside of the drum where the wire rope is wound, either by welding or by disassembly, on the corresponding winch component such as the frame or support frame. The guide rod 2 on the support 1 is positioned so that it faces the wire rope, close to the wire rope wound on the drum with a certain gap. When the wire rope wound on the drum becomes loose or breaks, the taut wire rope on the drum will slack off, resulting in a larger outer diameter in the loosened area. As the drum rotates, this loose area will contact the guide rod 2. In the detection circuit of the safety protection device, when the wire rope contacts the guide rod 2, the circuit detects a change in current because the wire rope and guide rod 2 form a loop. This change is identified as an abnormal signal by the control unit of the safety protection device, triggering an alarm or shutdown operation to prevent accidents caused by wire rope slack or breakage.

[0024] More specifically, the detection circuit is formed by connecting the guide rod 2 and the wire rope on the drum via wires. To maintain the accuracy of the detection circuit, it is necessary to ensure the accurate positions of the support 1 and the guide rod 2, and to correctly judge the state of the wound wire rope based on the continuity of the detection circuit. Therefore, an insulating component 3 can be installed between the guide rod 2 and the installed support 1 to prevent the guide rod 2 in the detection circuit from forming a conductive circuit with the hoisting mechanism and the wire rope installed on it through the support 1, thereby avoiding short circuits or malfunctions in the detection circuit. (In practical applications, the end of the wire rope is usually fixed to the wall of the wound drum, and the drum and hoisting mechanism are usually made of metal materials, so the connection to the end of the wire rope in the detection circuit is crucial). Thus, the safety protection device for the wire rope detection, with its simple structure and reliable detection mechanism, effectively improves the safety of the wire rope during use and significantly reduces costs, which is of great significance for the popularization of safety performance in hoisting equipment.

[0025] In one embodiment, the guide rod 2 is located below or to the side of the drum where the wire rope is wound. The distance between the guide rod 2 and the wire rope is set to 20mm. Specifically, in the safety protection device for detecting wire rope, the installation position of the guide rod 2 relative to the wire rope is related to the accuracy of detecting slack or broken rope conditions. For wire ropes of different models and under different operating or maintenance conditions, their outermost contour is not a flat circular curved surface. Therefore, sufficient clearance needs to be left between the guide rod 2 and the wire rope, but the distance should not be too far, so as not to effectively detect slack or broken rope conditions with small slack. For example, since the application range of the winch wire rope is generally 8-40mm, a 20mm interval can be set to arrange the position of the mounting bracket 1 and the guide rod 2 on it to obtain a better applicable range. Similarly, the distance between the guide rod 2 and the wire rope can also be adjusted according to the specific size and model of the winch and the diameter of the wire rope on it (not shown in the figure). Similarly, regardless of whether the drum containing the wire rope in the winch mechanism is installed upright, sideways, or inverted, the side of the drum support connected to the frame or hub of the winch mechanism can be understood as its lower side. That is, its lower or side position corresponds to the fixed direction of the wire rope drum, facilitating the installation of the safety protection device's support 1 near the drum and the placement of the guide rod 2 on the outside of the wire rope.

[0026] Please see Figure 1 In one embodiment, two guide rods 2 are mounted on the support 1, and the distance between the two guide rods 2 is greater than the distance between the guide rods 2 and the wire rope. The two guide rods 2 are spaced at the same or different intervals from the wire rope. The two ends of the detection circuit are electrically connected to the two guide rods 2 respectively.

[0027] Specifically, in this embodiment of the invention, the support 1 is arranged in a symmetrical structure, and two guide rods 2 are installed on it. That is, both guide rods 2 are connected to the detection circuit and form their own loops to increase the detection range of the wire rope wound on the drum. The two guide rods 2 can be positioned at the same or different distances from the wire rope; that is, the distances can be the same or different. When the distances are the same, after the wire rope slackens, it falls onto both guide rods 2 simultaneously, triggering the high and low water level relays to activate the alarm. When the distances are different, after the wire rope slackens, the guide rod 2 closest to the wire rope is triggered first, and the low water level relay also activates the alarm. This arrangement allows for the two guide rods 2 to be positioned at different circumferential or axial locations on the wound wire rope. For example, depending on the direction of gravity or traction of the wound wire rope, the deformation of the outer contour is greater when slack or breakage occurs in the direction of force. Therefore, sensitivity can be increased by relatively reducing the spacing between them, or false positives can be prevented by increasing the spacing, while still ensuring that cases of slack or breakage are not missed. For locations where the deformation of the outer contour is smaller when slack or breakage occurs, the guide rods 2 can be placed closer to the location to improve detection sensitivity and avoid missed detections.

[0028] Similarly, to improve detection accuracy, more guide rods 2 can be equipped in the safety protection device, which can be evenly distributed along the circumference of the drum. In this way, any slack or breakage of the wire rope at any point can be detected in a timely manner.

[0029] In one embodiment, the detection circuit includes a liquid level relay, with its low-level and high-level detection points connected to two guide rods 2, respectively. The low-level detection point of the liquid level relay is connected to the guide rod 2 closest to the wire rope, and the high-level detection point is connected to the remaining guide rod 2.

[0030] Specifically, by using a level relay, leveraging its high sensitivity and safety, two guide rods 2 of the safety protection device for detecting the wire rope are used to simulate low and high water levels, respectively. One guide rod 2 (relatively closer to the lifting device) is connected to the low water level detection point of the level relay, and the other guide rod 2 is connected to the high water level detection point. Both the normally open and normally closed contacts of the level relay are connected to the PLC, corresponding to low and high water level triggers, respectively. When the wire rope becomes loose, it first contacts the first guide rod 2, triggering the low water level detection point of the level relay. The PLC in the safety protection device receives the signal and issues a loose rope alarm, stopping the hoisting mechanism. The operator then inspects and handles the situation on-site. When the wire rope breaks, it quickly contacts both guide rods 2, rapidly triggering both the low and high water level detection points of the level relay. The PLC receives the signal and issues a broken rope alarm, stopping the entire machine. The operator then confirms and handles the situation on-site.

[0031] In summary, the safety protection device for detecting slack or broken wire rope provided by this utility model mainly consists of a guide rod, insulating components and a support, and a detection circuit. It is designed using the principle of low-voltage signal conduction, installed on the bottom or side of the wound wire rope on the drum. A wire is connected to one end of the guide rod, and insulating material is used between the guide rods to maintain a gap between the guide rod and the outer diameter of the drum after the wire rope is wound. When the wire rope slackens on the drum and hangs down (or breaks), it touches the guide rod, forming a path and triggering a signal that is fed back to the control system. This enables the detection of slack, tangled, and broken ropes, effectively protecting the winch equipment.

[0032] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A safety protection device for detecting slack or broken wire ropes, characterized in that, include: Support (1), said support (1) is installed on the outside of the drum around which the wire rope is wound; Guide rod (2), the guide rod (2) is installed on the support (1) on the side close to the wire rope, and there is a gap between it and the wire rope, and the guide rod (2) is made of conductor material; as well as The detection circuit includes the guide rod (2) and the wire rope.

2. The apparatus according to claim 1, characterized in that, It also includes an insulating component (3), which is installed between the guide rod (2) and the support (1).

3. The apparatus according to claim 2, characterized in that, The guide rod (2) is located below or to the side of the drum on which the wire rope is wound.

4. The apparatus according to claim 3, characterized in that, The detection circuit uses a low-voltage signal. One end of the circuit is electrically connected to the guide rod (2), and the other end is electrically connected to the wire rope.

5. The apparatus according to claim 4, characterized in that, The distance between the guide rod (2) and the wire rope is set to 20mm.

6. The apparatus according to claim 3, characterized in that, The support (1) is equipped with two guide rods (2), and the distance between the two guide rods (2) is greater than the distance between the guide rods (2) and the wire rope.

7. The apparatus according to claim 6, characterized in that, The two guide rods (2) are spaced at the same or different distances from the wire rope.

8. The apparatus according to claim 7, characterized in that, The two ends of the detection circuit are electrically connected to the two guide rods (2) respectively.

9. The apparatus according to claim 8, characterized in that, The detection circuit is equipped with a liquid level relay, and the low water level detection point and the high water level detection point of the liquid level relay are respectively connected to the two guide rods (2).

10. The apparatus according to claim 9, characterized in that, The low water level detection point of the liquid level relay is connected to the guide rod (2) closest to the steel wire rope among the two guide rods (2), and the high water level detection point of the liquid level relay is connected to the remaining guide rod (2).

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