Cable crane monitoring unit device

Abstract

The utility model discloses a cable crane monitoring unit device, which relates to the field of crane cable tension monitoring and comprises an upper clamp, a lower clamp is fixedly mounted below the upper clamp through a bolt and a nut, a clamping cavity is arranged between the upper clamp and the lower clamp, an inserting sleeve is welded at the top of the upper clamp, and the inserting sleeve is fixedly connected with the lower clamp through a bolt and a nut. A connecting rod is fixedly installed on the inner wall of the inserting sleeve through a bolt and a nut, a connecting piece is fixedly installed on the outer side of the connecting rod through a bolt and a nut, a force measuring roller is rotationally installed on the inner side of the end, away from the connecting rod, of the connecting piece, and the force measuring roller is used for measuring the pulling force of the cable. And a sliding detection mechanism for detecting the wrap angle of the cable is mounted below the connecting rod. By arranging the sliding detection mechanism and the force measuring roller, the purpose of indirectly measuring the lifting tension is achieved, direct measurement is not needed, and therefore the problem that cable connecting points are increased is solved, the integrity of the cable is guaranteed, and safety is improved.

Description

Technical Field

[0001] This utility model relates to the field of crane cable tension monitoring, specifically a cable crane monitoring unit device. Background Technology

[0002] The load-bearing capacity of cable cranes is generally achieved through piezoelectric load cells, which are installed between two cable sections and must directly bear the lifting tension. This direct monitoring method is very prone to damage during use and increases the number of connection points in the cable, leading to a decrease in cable safety. Utility Model Content

[0003] The purpose of this utility model is to provide a cable crane monitoring unit device in order to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a cable crane monitoring unit device, including an upper clamp, a lower clamp fixedly installed below the upper clamp by bolts and nuts, a clamping cavity between the upper clamp and the lower clamp, a plug sleeve welded to the top of the upper clamp, a connecting rod fixedly installed on the inner wall of the plug sleeve by bolts and nuts, a connecting piece fixedly installed on the outer side of the connecting rod by bolts and nuts, a force measuring roller rotatably installed on the inner side of the connecting piece away from the connecting rod, the force measuring roller being used to measure the tension of the cable, and a sliding detection mechanism for detecting the cable wrap angle installed below the connecting rod.

[0005] As a further embodiment of this utility model: the sliding detection structure includes a telescopic frame fixedly installed on both sides of the outer wall of the connector, a slider integrally formed on the inner side of the crossbar of the telescopic frame, a guide rail slidably installed on the outer wall of the slider, and a sliding rod fixedly installed on the inner side of the two guide rails.

[0006] As a further embodiment of this utility model: the sliding detection mechanism further includes a groove formed at one end of the sliding rod, a rotating rod rotatably mounted on the inner side of the groove, a conical surface formed on the lower part of the inner wall of the rotating rod, the rotating rod being sleeved on the outer wall of the cable and located below the force measuring roller, the outer side of the sliding rod being fixedly connected to the fixing part of the photoelectric encoder, and the rotation center of the outer wall of the rotating rod being fixedly connected to the rotating part of the photoelectric encoder.

[0007] As a further embodiment of this utility model: the lower inner wall of the rotating rod is integrally formed with an upper conical surface, and a receiving groove is provided inside the rotating rod, with a ball bearing movably connected inside the receiving groove.

[0008] As a further embodiment of this utility model: one end of the force measuring roller is fixedly connected to the rotating part of the conductive slip ring at its rotation center, the outer side of the connector is rotatably connected to the fixed part of the conductive slip ring, and the fixed part of the conductive slip ring is electrically connected to the power supply component in the crane cab through a wire.

[0009] Compared with the prior art, the beneficial effects of this utility model are:

[0010] 1. By setting up a sliding detection mechanism and force measuring rollers, the purpose of indirectly measuring the lifting force is achieved, eliminating the need for direct measurement. This avoids the problem of increasing the number of cable connection points, ensures the integrity of the cable, and improves safety. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of this utility model;

[0012] Figure 2 This is a schematic diagram of the connection between the rotating rod and the cable of this utility model;

[0013] Figure 3 This is a schematic diagram of the rotating installation of the ball bearing of this utility model;

[0014] Figure 4 This is a schematic diagram of the telescopic frame structure of a utility model.

[0015] In the diagram: 1. Upper clamp; 2. Lower clamp; 3. Insert sleeve; 4. Connecting rod; 5. Connector; 6. Force measuring roller; 7. Cable; 8. Telescopic frame; 9. Sliding rod; 10. Guide rail; 11. Slider; 12. Rotating rod; 13. Conical surface; 14. Ball bearing; 15. Receiving groove; 16. Photoelectric encoder. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] Please see Figures 1-4In this embodiment of the utility model, the cable crane monitoring unit device includes an upper clamp 1, a lower clamp 2 fixedly installed below the upper clamp 1 by bolts and nuts, a clamping cavity between the upper clamp 1 and the lower clamp 2, a plug sleeve 3 welded to the top of the upper clamp 1, a connecting rod 4 fixedly installed on the inner wall of the plug sleeve 3 by bolts and nuts, a connecting piece 5 fixedly installed on the outer side of the connecting rod 4 by bolts and nuts, a force measuring roller 6 rotatably installed on the inner side of the connecting piece 5 away from the connecting rod 4, the force measuring roller 6 is used to measure the tension of the cable 7, and a sliding detection mechanism for detecting the wrap angle of the cable 7 is installed below the connecting rod 4.

[0018] In this embodiment: First, the upper clamp 1 and lower clamp 2 are fixedly installed on the crane boom (corresponding rods to the upper clamp 1 and lower clamp 2 need to be welded onto the boom). Then, the crane cable 7 passes through the force measuring roller 6 (model: L2-50KN-ST-Φ20-IP67-A) and is adjusted with the sliding detection mechanism. The sliding detection mechanism is used to detect the wrap angle between the cable 7 and the force measuring roller 6. According to mechanical equilibrium, the relationship between the vertical force F on the force measuring roller 6 and the tension T of the cable 7 is: Where α is the wrap angle, if the wrap angle α is always constant, then the tension T is deduced from F, and the actual load weight W is calculated using the pulley system ratio. M is the pulley block ratio, and N is the mechanical efficiency. After the calculation is completed, the electrical signal of the calculation result is converted into a digital signal and displayed on the display screen in the cab, so that the crane operator can judge whether the lifting weight exceeds the standard.

[0019] Please refer to this carefully. Figure 1 The sliding detection structure includes a telescopic frame 8 fixedly installed on both sides of the outer wall of the connector 5. A slider 11 is integrally formed on the inner side of the crossbar of the telescopic frame 8. A guide rail 10 is slidably installed on the outer wall of the slider 11. A sliding rod 9 is fixedly installed on the inner side of the two guide rails 10. The sliding detection mechanism also includes a groove opened at one end of the sliding rod 9. A rotating rod 12 is rotatably installed on the inner side of the groove. A conical surface 13 is formed on the lower part of the inner wall of the rotating rod 12. The rotating rod 12 is sleeved on the outer wall of the cable 7 and located below the force measuring roller 6. The outer side of the sliding rod 9 is fixedly connected to the fixed part of the photoelectric encoder 16. The rotation center of the outer wall of the rotating rod 12 is fixedly connected to the rotating part of the photoelectric encoder 16.

[0020] In this embodiment: During the lifting process, the top of the cable 7 is connected to the winch, so the angle between the upper half of the cable 7 and the force measuring roller 6 remains unchanged. During the lifting process, the lower half of the cable 7 swings accordingly. During the swing, the cable 7 drives the rotating rod 12 to swing synchronously, and the rotating rod 12 drives the rotating part of the photoelectric encoder 16 to rotate. At this time, the code disk of the rotating part of the photoelectric encoder 16 rotates. The light emitted by the light source in the fixed part of the photoelectric encoder 16 shines on the photosensitive element through the light-transmitting area of ​​the code disk. The light intensity received by the photosensitive element changes periodically, thereby generating a periodic electrical signal. After the electrical signal is amplified and shaped by the circuit, a pulse pattern corresponding to the rotation of the code disk is formed. By using the pulse pattern technology, the rotation angle and speed of the rotating rod 12 can be measured. It should be noted that there are two light surface elements and they are set at a 90-degree offset. The rotation direction of the code disk can be determined according to the phase relationship of the two sets of signals.

[0021] During the rotation of the rotating rod 12, the contact position between the cable 7 and the force measuring roller 6 changes, thus generating tension or thrust. Under tension or thrust, the sliding rod 9 slides, and the sliding rod 9 drives the guide rail 10 to slide synchronously. Meanwhile, since the rotating rod 12 rotates with the swing of the cable 7 around the force measuring roller 6, the telescopic frame 8 extends and retracts during the above process to avoid motion interference.

[0022] This design allows for precise measurement of the swing angle of the portion of cable 7 below the force-measuring roller 6, thereby enabling more accurate measurement of the force on cable 7.

[0023] It should be noted that: the upper part of the telescopic frame 8 is fixedly connected to the outer side of the connector 5, the upper part of the lower part of the telescopic frame 8 is slidably connected to the inner wall of the upper part of the telescopic frame 8, and the lower part of the telescopic frame 8 is slidably connected to the guide rail 10.

[0024] Please refer to this carefully. Figure 1 The inner wall of the rotating rod 12 has an integrally formed conical surface 13, and the interior of the rotating rod 12 has a receiving groove 15, with a ball bearing 14 movably connected inside the receiving groove 15.

[0025] In this embodiment: when the cable 7 is wound up in a non-load-bearing state, the cable 7 is partially bent. Therefore, the design of the conical surface 13 can avoid the hard collision between the rotating rod 12 and the bottom of the inner wall of the cable 7, which would cause damage.

[0026] The design of the ball bearing 14 can reduce the friction between the cable 7 and the rotating rod 12 during the winding process.

[0027] Please refer to this carefully. Figure 1One end of the force measuring roller 6 is fixedly connected to the rotating part of the conductive slip ring at its rotation center. The outer side of the connector 5 is rotatably connected to the fixed part of the conductive slip ring. The fixed part of the conductive slip ring is electrically connected to the power supply component in the crane cab through a wire.

[0028] In this embodiment: A piezoelectric sensor is installed inside the force measuring roller 6. During the process of the cable 7 lifting the heavy object, it squeezes the rope groove of the force measuring roller 6. The tension T generates a normal compressive force F within the wrap angle range of the force measuring roller 6. The compressive force is transmitted to the deformation zone through the surface of the force measuring roller 6, causing the elastic body to strain. The deformation of the elastic body causes a change in resistance, which is converted into an electrical signal through a Wheatstone bridge and output through a conductive slip ring.

[0029] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A cable crane monitoring unit device, comprising an upper clamp (1), a lower clamp (2) is fixedly installed below the upper clamp (1) through bolts and nuts, and the upper clamp (1) and the lower clamp (2) have a clamping cavity therebetween, characterized in that, The top of the upper clamp (1) is welded with a plug-in sleeve (3), the inner wall of the plug-in sleeve (3) is fixedly installed with a connecting rod (4) through bolts and nuts, the outer side of the connecting rod (4) is fixedly installed with a connecting piece (5) through bolts and nuts, the inner side of the end of the connecting piece (5) away from the connecting rod (4) is rotatably installed with a force measuring roller (6), the force measuring roller (6) is used for measuring the tension of a cable (7), and the lower portion of the connecting rod (4) is installed with a sliding detection mechanism for detecting the wrapping angle of the cable (7).

2. The cable crane monitoring unit arrangement according to claim 1, characterized in that, The sliding detection mechanism comprises telescopic supports (8) fixedly installed on the outer walls of the connecting piece (5) on both sides, the inner side of the cross bar portion of the telescopic support (8) is integrally formed with a sliding block (11), the outer wall of the sliding block (11) is slidably installed with a guide rail (10), and the inner sides of the two guide rails (10) are fixedly installed with a sliding rod (9).

3. The cable crane monitoring unit arrangement according to claim 2, characterized in that, The sliding detection mechanism further comprises a groove formed in one end of the sliding rod (9), a rotating rod (12) is rotatably installed in the inner side of the groove, a conical surface (13) is formed in the inner wall of the rotating rod (12) at the lower portion, the rotating rod (12) is sleeved on the outer wall of the cable (7) and located below the force measuring roller (6), one side of the outer portion of the sliding rod (9) is fixedly connected with the fixed portion of an optical encoder (16), and the outer wall of the rotating rod (12) is fixedly connected with the rotating portion of the optical encoder (16) at the position of the rotating center.

4. The cable crane monitoring unit arrangement according to claim 3, characterized in that, The inner wall of the rotating rod (12) is integrally formed with an upper conical surface (13) at the lower portion, the rotating rod (12) is provided with an accommodating groove (15) in the inner portion, and the accommodating groove (15) is movably connected with a ball (14) in the inner portion.

5. The cable crane monitoring unit arrangement according to claim 4, characterized in that, The rotating center of one end of the force measuring roller (6) is fixedly connected with the rotating portion of a conductive slip ring, one side of the outer portion of the connecting piece (5) is rotatably connected with the fixed portion of the conductive slip ring, and the fixed portion of the conductive slip ring is electrically connected with a power supply assembly in the cab of the crane through a wire.

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