Pull rope stress monitoring device

Abstract

The utility model provides a stay cord stress monitoring device, and relates to the field of stay cord stress state monitoring devices. The pull rope stress monitoring device comprises a monitoring bracket; the rope pressing device is movably arranged on the monitoring support, and the rope pressing device is located at a first position on the monitoring support when the rope pressing device is not subjected to external force outside the monitoring device larger than or equal to a preset threshold value; and the sensor is used for detecting whether the rope pressing device is at the first position or not. Workers can conveniently judge whether the lifting mechanism effectively lifts the load or not, the empty running probability of the lifting mechanism is effectively reduced, and the working efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the field of stay rope stress state monitoring devices, and particularly to a stay rope stress monitoring device. Background Art

[0002] With the development of economy, technology and society, the research and application of lifting equipment have developed rapidly, and the monitoring of the states of various mechanisms during their operation has attracted great attention from countries around the world. The hoisting mechanism is the most important and basic mechanism in lifting equipment, and the steel wire rope is one of the key components that make up this mechanism. The quality of its working state directly affects the working ability of the entire equipment.

[0003] For the hoisting mechanism, whether the steel wire rope is effectively stressed during its operation is particularly important. Especially in the case of sling loading in an environment where it is inconvenient to directly observe or invisible, or remote control, the staff cannot visually judge whether the hoisting mechanism effectively lifts the load, which affects the working efficiency of the hoisting mechanism and there are certain safety risks. In view of this, a device that can monitor the stress of the steel wire rope is needed to confirm whether the hoisting mechanism effectively lifts the load. Summary of the Utility Model

[0004] In view of the above-mentioned deficiencies of the prior art, the utility model provides a stay rope stress monitoring device to improve the technical problem that it is impossible to judge whether the hoisting mechanism effectively lifts the load during sling loading in an invisible environment or under remote control.

[0005] To achieve the above object and other related objects, the utility model provides a stay rope stress monitoring device, including a monitoring bracket; a rope pressing device movably arranged on the monitoring bracket, and when the rope pressing device is not subjected to an external force outside the monitoring device greater than or equal to a preset threshold, the rope pressing device is in a first position on the monitoring bracket; a sensor for detecting whether the rope pressing device is in the first position.

[0006] In an exemplary embodiment of the present application, the rope pressing device includes a connecting rod and a roller. The connecting rod is arranged on the monitoring bracket, and the roller is rotatably arranged on the connecting rod.

[0007] In an exemplary embodiment of the present application, a groove is arranged on the monitoring bracket, and both ends of the connecting rod are respectively arranged on both sides of the groove.

[0008] In an exemplary embodiment of the present application, one end of the connecting rod is rotatably connected to the monitoring bracket.

[0009] In an exemplary embodiment of the present application, an installation hole is arranged on the monitoring bracket, and the connecting rod is rotatably connected to the monitoring bracket through a pin shaft arranged in the installation hole.

[0010] In an exemplary embodiment of the present application, a long hole penetrating outward from the monitoring bracket is provided on the side wall of the groove, the other end of the connecting rod penetrates through the long hole, and the connecting rod moves up and down in the long hole.

[0011] In an exemplary embodiment of the present application, the monitoring device includes a sensor bracket, the sensor bracket is arranged on the side wall of the monitoring bracket where the long hole is provided, and the sensor is arranged on the sensor bracket.

[0012] In an exemplary embodiment of the present application, the monitoring device includes an elastic member, one end of the elastic member is connected to the rope pressing device, and the other end is connected to the monitoring bracket. When the rope pressing device disengages from the first position, the elastic member applies a force to make the rope pressing device tend to the first position.

[0013] In an exemplary embodiment of the present application, a limiting portion is provided on the rope pressing device, and the elastic member is arranged at the limiting portion to limit the relative movement between the elastic member and the rope pressing device.

[0014] In an exemplary embodiment of the present application, an adjusting gasket is detachably arranged at the bottom of the monitoring bracket.

[0015] Combined with the prior art, the beneficial effects of the present invention are as follows:

[0016] In the existing hoisting mechanism, in the case of non-visual or remote control, the staff cannot effectively judge whether the load is effectively hoisted. The monitoring device of the present application includes a rope pressing device and a sensor. When in use, the rope pressing device presses against the upper side of the pulling rope. When the pulling rope is unloaded, the forces at both ends of the pulling rope are small, the rope pressing device makes the pulling rope bend downward, and the external force given by the pulling rope to the rope pressing device is small, so that the rope pressing device is in the first position. When the sensor detects that the rope pressing device is in the first position, a first signal will be given, and the staff can judge that the hoisting mechanism has not effectively hoisted the load. When the pulling rope hoists the load, the forces at both ends of the pulling rope are large, which makes the pulling rope taut, so that the pulling rope gives an external force greater than or equal to the preset threshold to the rope pressing device, causing the rope pressing device to disengage from the first position. When the sensor detects that the rope pressing device has disengaged from the first position, a second signal is given, and the staff can judge that the hoisting mechanism effectively hoists the load. The staff can distinguish the stress state of the pulling rope according to different signals, which is convenient for judging whether the hoisting mechanism effectively hoists the load, effectively reducing the probability of the hoisting mechanism running empty and improving work efficiency. Description of the Drawings

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0018] Figure 1 Schematic diagram of an exemplary rope tension monitoring device for this application;

[0019] Figure 2 Partial schematic diagram of an exemplary monitoring device for this application;

[0020] Figure 3 Schematic diagram of an exemplary monitoring bracket for this application;

[0021] Figure 4 Schematic diagram of an exemplary rope pressing device for this application.

[0022] Element number description

[0023] 100, monitoring bracket; 110, groove; 120, mounting hole; 130, pin shaft; 140, long slot; 150, mounting groove;

[0024] 200, rope pressing device; 210, connecting rod; 211, limiting part; 212, through hole; 220, roller; 221, rolling groove;

[0025] 300, sensor; 310, sensor bracket;

[0026] 400, elastic member;

[0027] 500, adjusting shim;

[0028] 600, rope. Specific embodiments

[0029] The following specific examples illustrate the embodiments of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments. The details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that, without conflict, the following embodiments and the features in the embodiments can be combined with each other. It should also be understood that the terms used in the embodiments of the present invention are for the purpose of describing specific implementation schemes, rather than limiting the protection scope of the present invention. The test methods without specific conditions noted in the following embodiments are usually carried out under conventional conditions or according to the conditions recommended by each manufacturer.

[0030] When numerical ranges are given in the embodiments, it should be understood that unless otherwise specified in the present utility model, both endpoints of each numerical range and any value between the two endpoints can be selected. Unless otherwise defined, all technical and scientific terms used in the present utility model, based on the understanding of the prior art by those skilled in the art and the description of the present utility model, any method, device, and material similar or equivalent to the prior art described in the embodiments of the present utility model can also be used to implement the present utility model.

[0031] It should be noted that the terms such as "upper", "lower", "left", "right", "middle", and "one" cited in this specification are only for the convenience of clear narration, rather than to limit the scope of implementation of the present utility model. The change or adjustment of their relative relationship, without substantial change in the technical content, should also be regarded as the scope of implementation of the present utility model.

[0032] Whether the steel wire rope is stressed during the operation of the hoisting mechanism is particularly important. Especially in environments such as remote control and environments where it is easy to cause harm to the body, the staff cannot directly observe whether the hoisting mechanism effectively lifts the load, which is prone to misjudgment, reducing the working efficiency of the hoisting mechanism and prone to safety problems.

[0033] Please refer to Figures 1 to 4In view of this, the utility model provides a device for monitoring the force of a pull rope, including a monitoring bracket 100, a rope pressing device 200 and a sensor 300. The monitoring bracket 100 facilitates the assembly of other components of the monitoring device on the one hand, and is used to be installed on the main body of the lifting mechanism or other parts close to the pull rope 600 on the other hand, so as to facilitate the monitoring device to monitor whether the pull rope 600 is effectively hoisted. The rope pressing device 200 is movably arranged on the monitoring bracket 100, and the rope pressing device 200 has at least a first position and a non-first position on the monitoring bracket 100. When the rope pressing device 200 is not subjected to an external force outside the monitoring device greater than or equal to a preset threshold, the rope pressing device 200 is in the first position on the monitoring bracket 100. The sensor 300 detects whether the rope pressing device 200 is in the first position. Exemplarily, when the sensor 300 detects that the rope pressing device 200 is in the first position, a first signal is issued; when the sensor 300 detects that the rope pressing device 200 is in the non-first position, a second signal is issued. When in use, the monitoring device is installed on the equipment body near the pull rope 600 or other convenient fixed position through the monitoring bracket 100, and the rope pressing device 200 is pressed against the top of the pull rope 600. When the pull rope 600 is unloaded, the pull rope 600 will bend downward at the point of contact with the rope pressing device 200, and the upward force exerted by the pull rope 600 on the rope pressing device 200 is small, that is, the force exerted by the pull rope 600 on the rope pressing device 200 is not enough to cause the rope pressing device 200 to leave the first position. At this time, the sensor 300 sends a first signal, and the staff can judge that the pull rope 600 is unloaded and the lifting mechanism fails to effectively lift the load. When the pull rope 600 effectively lifts the load, the two ends of the pull rope 600 are subjected to greater force, so that the pull rope 600 is taut, and the pull rope 600 exerts a greater upward force on the rope pressing device 200. When the upward force exerted by the pull rope 600 on the rope pressing device 200 is greater than or equal to the preset threshold, the rope pressing device 200 leaves the first position, and the sensor 300 sends a second signal, or the sensor 300 does not send a signal. The staff determines that the pull rope 600 is loaded based on whether the sensor 300 does not send the first signal or the sensor 300 sends the second signal, thereby determining the effective load of the lifting mechanism. The monitoring device of the present application distinguishes the stress state of the pull rope 600, thereby determining whether the lifting mechanism effectively lifts the load, effectively reducing the probability of the lifting mechanism running empty, improving work efficiency, saving energy and reducing emissions, and also reducing the misjudgment of actually lifting the load but mistakenly thinking that there is no lifting load, thereby improving the safety of the lifting mechanism.

[0034] See also Figure 2 and Figure 4, in one embodiment, the rope pressing device 200 includes a connecting rod 210 and a roller 220. The connecting rod 210 is disposed on the monitoring bracket 100, and the roller 220 is rotatably disposed on the connecting rod 210. When the monitoring device is in use, the roller 220 is pressed against the pulling rope 600. When the pulling rope 600 is lifted or lowered, the friction between the pulling rope 600 and the roller 220 is rolling friction, thereby reducing the friction between the pulling rope 600 and the rope pressing device 200, reducing the wear of the pulling rope 600 and the rope pressing device 200, and improving the service life of the monitoring device.

[0035] Please refer to Figure 4 , further, a rolling groove 221 is provided in the middle of the roller 220. When installed, the pulling rope 600 is installed in the rolling groove 221. The pulling rope 600 is limited by the rolling groove 221 to prevent the pulling rope 600 from shifting or detaching from the rope pressing device 200 during use, thereby improving the practicability of the monitoring device.

[0036] Please refer to Figures 1 to 3 , in one embodiment, a groove 110 is provided on the monitoring bracket 100. The two ends of the connecting rod 210 are respectively disposed on both sides of the groove 110. The groove 110 can accommodate the pulling rope 600 to pass through, which facilitates the roller 220 to be pressed against the pulling rope 600.

[0037] Please refer to Figure 1 and Figure 2 , in one embodiment, one end of the connecting rod 210 is rotatably connected to the monitoring bracket 100. Compared with the two ends of the connecting rod 210 that can both move linearly, the rotation trajectory of the connecting rod 210 is more stable and controllable.

[0038] Please refer to Figure 2 and Figure 4 , further, an installation hole 120 is provided on the monitoring bracket 100. The connecting rod 210 is rotatably connected to the monitoring bracket 100 through a pin shaft 130 disposed in the installation hole 120. Exemplarily, an installation groove 150 is provided on the monitoring bracket 100. The installation groove 150 is arranged along the length direction of the connecting rod 210. The installation hole 120 penetrates the monitoring bracket 100 along a direction perpendicular to the installation groove 150. One end of the connecting rod 210 is inserted into the installation groove 150. A through hole 212 is provided on the connecting rod 210, and the position of the through hole 212 corresponds to that of the installation hole 120. The pin shaft 130 penetrates the through hole 212 and the installation hole 120 to realize the rotational connection between the connecting rod 210 and the monitoring bracket 100.

[0039] Please refer to Figure 1 and Figure 3In one embodiment of the utility model, the side wall of the groove 110 is provided with an elongated hole 140 penetrating to the outside of the monitoring bracket 100. The elongated hole 140 may be a rectangular hole, a waist-shaped hole, etc., preferably a waist-shaped hole. The other end of the connecting rod 210 penetrates the elongated hole 140, that is, the end of the connecting rod 210 away from the rotational connection with the monitoring bracket 100 penetrates the elongated hole 140, and the connecting rod 210 moves up and down in the elongated hole 140. When the connecting rod 210 is subjected to different external forces, the connecting rod 210 rotates around the axis of the pin shaft 130, and the end of the connecting rod 210 away from the pin shaft 130 moves in the elongated hole 140, so that the connecting rod 210 is in the first position or out of the first position.

[0040] See also Figures 1 to 3 In one embodiment of the utility model, the monitoring device includes a sensor bracket 310, and the sensor bracket 310 is arranged on the side wall of the monitoring bracket 100 where the long hole 140 is arranged. The sensor 300 is arranged on the sensor bracket 310. The sensor 300 can be a contact sensor 300 such as a pressure sensor 300, or an inductive sensor 300 such as an infrared sensor 300. Preferably, the sensor 300 is a contact sensor 300, which has low cost, simple arrangement, and stable use. The contact sensor 300 is arranged on the side wall of the monitoring bracket 100 where the long hole 140 is arranged. When the connecting rod 210 is in the first position, the end of the connecting rod 210 away from the pin 130 abuts against the contact sensor 300, and the contact sensor 300 sends a first signal, so that the staff can make a judgment that the lifting mechanism does not effectively lift the load. When the connecting rod 210 is not in the first position, the end of the connecting rod 210 away from the pin 130 is separated from the contact sensor 300, and the contact sensor 300 sends a second signal or no signal, then the staff can make a judgment that the lifting mechanism can effectively lift the load.

[0041] Furthermore, the sensor 300 is arranged on the side away from the groove 110, that is, the sensor 300 is arranged on the outer wall of the monitoring bracket 100, which can prevent the pull rope 600 from colliding with the sensor 300 when it is separated from the roller 220, thereby reducing the risk of damage to the sensor 300.

[0042] See also Figure 1, in an embodiment of the present utility model, the monitoring device includes an elastic member 400. One end of the elastic member 400 is connected to the rope pressing device 200, and the other end is connected to the monitoring bracket 100. When the rope pressing device 200 disengages from the first position, the elastic member 400 applies a force to make the rope pressing device 200 tend to the first position. When the elastic member 400 is not provided, the rope pressing device 200 relies on its own gravity to make the rope pressing device 200 be in the first position. During use, the rope pressing device 200 can only be arranged on the upper part of the pulling rope 600, restricting the installation and use of the monitoring device. Especially for some pulling ropes 600 that are only used vertically, the monitoring device without the elastic member 400 cannot monitor the force on the pulling rope 600. By providing the elastic member 400, the elastic member 400 applies a force to the rope pressing device 200 to tend to the first position, which is still applicable to the vertical pulling rope 600 or the pulling rope 600 at other angles. For example, when the vertical pulling rope 600 is in use, when the pulling rope 600 has no payload, the elastic member 400 and the rope pressing device 200 cooperate to make the pulling rope 600 bend; when the pulling rope 600 has a payload, the pulling rope 600 is tightened, causing the rope pressing device 200 to overcome the acting force of the elastic member 400, and the rope pressing device 200 disengages from the first position.

[0043] Further, the elastic member 400 is a spring. One end of the spring is connected to the connecting rod 210, and the other end of the spring is connected to the bottom of the groove 110. The spring applies a force to the connecting rod 210 towards the bottom of the groove 110, so that the connecting rod 210 remains in the first position.

[0044] Please refer to Figure 4 , in an embodiment of the present utility model, a limiting portion 211 is provided on the rope pressing device 200, and the elastic member 400 is arranged at the limiting portion 211 to limit the relative movement between the elastic member 400 and the rope pressing device 200, thereby preventing the relative movement between the elastic member 400 and the rope pressing device 200 when the rope pressing device 200 disengages from the first position.

[0045] Please refer to Figure 4 , exemplarily, a limiting groove is provided on the connecting rod 210. The mounting ring at one end of the spring is sleeved on the limiting groove of the connecting rod 210. The spring maintains the pulling force on the connecting rod 210, that is, the spring is in a stretched state. The mounting ring is snapped into the limiting groove to limit the movement of the spring on the connecting rod 210. Further, a mounting rod is provided on the monitoring bracket 100, and the end of the spring away from the connecting rod 210 is sleeved on the mounting rod to realize the connection between the spring and the monitoring bracket 100.

[0046] In an embodiment of the present application, an adjusting gasket 500 is detachably arranged at the bottom of the monitoring bracket 100. By means of the adjusting gasket 500, the distance between the rope pressing device 200 and the installation position of the monitoring bracket 100 can be adjusted, and further the distance between the rope pressing device 200 and the pulling rope 600 can be adjusted, so as to ensure that the monitoring device can effectively monitor the force on the pulling rope 600.

[0047] Further, an installation part is arranged at the bottom of the monitoring bracket 100, and holes for bolts to pass through are arranged on the installation part. The monitoring bracket 100 is connected to the installed main body by bolts.

[0048] The rope force monitoring device of the present utility model has the beneficial effects of facilitating the judgment of whether the lifting mechanism effectively lifts the load, effectively reducing the probability of the lifting mechanism running empty, and improving work efficiency. Therefore, the present utility model effectively overcomes some practical problems in the prior art and thus has high utilization value and practical significance. The above embodiments are only illustrative of the principles and effects of the present utility model and are not used to limit the present utility model. Any person familiar with this technology can modify or change the above embodiments without departing from the spirit and scope of the present utility model. Therefore, all equivalent modifications or changes completed by those with ordinary knowledge in the technical field without departing from the spirit and technical idea disclosed by the present utility model should still be covered by the claims of the present utility model.

Claims

1. A pull rope force monitoring device, characterized in that: include: Monitoring stents; A rope pressing device is movably arranged on the monitoring bracket, and when the rope pressing device is not subjected to an external force from the monitoring device that is greater than or equal to a preset threshold, the rope pressing device is in a first position on the monitoring bracket; A sensor detects whether the rope pressing device is in the first position.

2. The pull rope force monitoring device according to claim 1, characterized in that: The rope pressing device comprises a connecting rod and a roller, wherein the connecting rod is arranged on the monitoring bracket, and the roller is rotatably arranged on the connecting rod.

3. The pull rope force monitoring device according to claim 2, characterized in that: The monitoring bracket is provided with a groove, and the two ends of the connecting rod are respectively arranged on both sides of the groove.

4. The pull rope force monitoring device according to claim 3, characterized in that: One end of the connecting rod is rotatably connected to the monitoring bracket.

5. The pull rope force monitoring device according to claim 4, characterized in that: The monitoring bracket is provided with a mounting hole, and the connecting rod is rotatably connected to the monitoring bracket via a pin shaft arranged in the mounting hole.

6. The pull rope force monitoring device according to claim 4, characterized in that: The side wall of the groove is provided with an elongated hole penetrating to the outside of the monitoring bracket, the other end of the connecting rod penetrates the elongated hole, and the connecting rod moves up and down in the elongated hole.

7. The pull rope force monitoring device according to claim 6, characterized in that: The monitoring device comprises a sensor bracket, wherein the sensor bracket is arranged on a side wall of the monitoring bracket where the long strip hole is arranged, and the sensor is arranged on the sensor bracket.

8. The pull rope force monitoring device according to claim 1, characterized in that: The monitoring device comprises an elastic member, one end of which is connected to the rope pressing device, and the other end is connected to the monitoring bracket. When the rope pressing device leaves the first position, the elastic member applies a force to make the rope pressing device move toward the first position.

9. The pull rope force monitoring device according to claim 8, characterized in that: The rope pressing device is provided with a limiting portion, and the elastic member is arranged at the limiting portion to limit the relative movement between the elastic member and the rope pressing device.

10. The pull rope force monitoring device according to claim 1, characterized in that: An adjustment gasket is detachably provided at the bottom of the monitoring bracket.

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