Balanced weight detection equipment for crane

Abstract

The present invention belongs to the technical field of special equipment detection, and provides a counterweight detection device for a crane, including a crane, a counterweight box, a plurality of counterweights, an information storage medium and a reader. The information storage medium includes a soft packaging layer, an electronic tag chip and four symmetrically arranged connection holes in pairs. An adsorber and a fixator are arranged in the connection holes. A Y-shaped connecting rope is arranged on each pair of fixators. One end of one Y-shaped connecting rope is provided with a flexible connector, and the end of the other Y-shaped connecting rope is provided with a spring chuck for passing through and mating with the flexible connector. A tension sensor is arranged at the uppermost part of all counterweights. A pulling rope distributed in the up-and-down direction around all counterweights is arranged between the two tension ends of the tension sensor. A quick gripper for clamping and mating with the Y-shaped connecting rope is arranged on the pulling rope. The present invention has reasonable design, simple structure, is easy to install, can detect the crack condition of the counterweight in real time and has strong practicability, and is suitable for large-scale popularization.

Description

Technical Field

[0001] The present invention belongs to the technical field of special equipment inspection, and particularly relates to a counterweight detection device for a crane. Background Art

[0002] A crane refers to a multi-action hoisting machine that suspends heavy objects with a hook or other lifting devices and vertically lifts and horizontally transports heavy objects within a certain range, also known as a hoist. A crane completes the loading and unloading of goods or the installation operation of equipment in a repeated and short working cycle. A working cycle includes taking objects, lifting the goods, horizontal movement, lowering, unloading, and then returning the empty lifting device to the original place. The main function of the crane counterweight is to ensure its stability by increasing the stability of the crane, so that it will not tip over due to the tipping moment during the hoisting operation and ensure better operation balance. Before the crane operates, it is necessary to install the counterweight at the position specified in the crane operation manual to ensure that the distribution of the counterweight and the center of gravity of the crane meet the design requirements. The inspection content of the counterweight generally includes the weight, size, quantity of the counterweight weights, and whether there are obvious cracks.

[0003] The existing patent CN100584733C discloses a counterweight detection device for a crane and a crane with the counterweight detection device. The device includes a basic machine with a lower traveling main body and an upper rotating main body; counterweights assembled on this basic machine; ID (identification) tags installed on each counterweight, in which ID information about the counterweight assembly status has been written; and an ID reader for reading the ID information. The assembly status of the counterweight is detected through wireless communication between the ID reader and the ID tag. This device can complete some basic inspection contents through wireless communication, such as the quantity and weight of the counterweight. However, the problems of this device are that the identification information storage medium is generally packaged in a rigid manner. When installing it on the counterweight, it needs to be installed by pasting or screwing. This is suitable for counterweights with a prismatic structure. For counterweights with a cylindrical structure, the identification information storage medium lacks an effective installation plane, so it is not convenient to install. Moreover, in addition to the basic information, the problem with the highest probability of occurrence in actual use of the counterweight is the crack problem. Generally, the counterweight is detected and installed on the ground and then no longer detected. And for a crane in the working state, it is also not convenient to detect in real time. Once a crack problem occurs and the detection is not timely, it will increase the risk coefficient of construction operations. Summary of the Invention

[0004] In view of the above technical problems existing in the crane and its counterweight, the present invention provides a counterweight detection device for a crane with reasonable design, simple structure, convenient installation, capable of detecting the crack condition of the counterweight in real time, and strong practicability.

[0005] To achieve the above object, the technical solution adopted by the present invention is that the counterweight detection device of the crane provided by the present invention includes a crane. An open-structured counterweight box is provided at the tail of the crane. A plurality of counterweights are arranged inside the counterweight box. An information storage medium is arranged on the counterweight. A reader in wireless communication with the information storage medium is arranged at a position of the crane close to the counterweight box. The information storage medium includes a soft packaging layer. An electronic tag chip is arranged at the center inside the soft packaging layer. Four symmetrically arranged connection holes in pairs are arranged at a position close to the edge of the soft packaging layer. An adsorber is arranged in the connection holes. The adsorber includes a negative pressure suction cup. A stud is arranged at one end of the negative pressure suction cup facing away from its adsorption surface. A fixator threadedly connected to the stud is arranged on the stud. There are four fixators in total and they are divided into two pairs on the left and right. A Y-shaped connecting rope is arranged on each pair of fixators. One end of one Y-shaped connecting rope is provided with a flexible connector. The flexible connector includes a soft sleeve. A plurality of connecting nodes distributed along its length direction are arranged on the soft sleeve. The connecting node has a triangular prism structure and a through hole is arranged at a position close to its edge. The other end of the other Y-shaped connecting rope is provided with a spring chuck for fitting through connection with the through hole. The length of the spring chuck is less than the distance between adjacent connecting nodes. A tension sensor is arranged at the uppermost part of all counterweights. The tension sensor is wirelessly communicatively connected to the control room of the crane. The tension sensor includes two tension ends. A pulling rope distributed in the up and down direction around all counterweights is arranged between the two tension ends. A plurality of quick clamps for clamping and cooperating with the Y-shaped connecting rope are arranged on the pulling rope.

[0006] Preferably, an annular groove is arranged on the side surface of the fixator. C-shaped cards clamped with the annular groove are arranged at both ends of the Y-shaped connecting rope.

[0007] Preferably, a plurality of uniformly distributed positioning holes are arranged on the C-shaped card. Flange holes corresponding to the positioning holes one by one are arranged at the end of the fixator. Positioning screws are arranged in the flange holes and the positioning holes.

[0008] Preferably, the soft packaging layer includes a circular silica gel sheet. The side of the silica gel sheet in the same direction as the adsorption surface of the negative pressure suction cup is a concave surface. A grid groove is arranged on the other side of the silica gel sheet. The grid groove corresponds to the distribution position of the electronic tag chip. The distribution area of the grid groove is larger than the area of the electronic tag chip. The grid groove is used to improve the bending toughness of the silica gel sheet.

[0009] Preferably, a pair of U-shaped openings are arranged at the edge of the silica gel sheet.

[0010] Preferably, a lengthening arm is threadedly connected to each of the two tension ends of the tension sensor. The lengthening arm is of a tubular structure and a plurality of radial holes for connecting the pulling rope are arranged on its side surface.

[0011] Preferably, a section of spiral groove is provided at a position of the extension arm away from the tension sensor, and the spiral groove is used for knotting and fixing the end of the pulling rope.

[0012] Preferably, the quick gripper includes a clamping sleeve, and a clamping opening for cooperating with the Y-shaped connecting rope is provided on the side surface of the clamping sleeve.

[0013] Preferably, a positioning pin for cooperating with the pulling rope is provided on the side surface of the clamping sleeve.

[0014] Preferably, both the Y-shaped connecting rope and the pulling rope are steel ropes, and a thermoplastic sheath is provided on the outer surface of the steel ropes.

[0015] Compared with the prior art, the advantages and positive effects of the present invention are as follows:

[0016] 1. The counterweight detection device for a crane provided by the present invention installs the electronic tag chip in the soft packaging layer in an embedded manner. The soft packaging layer together with the electronic tag chip has good adhesiveness, can cooperate with prismatic counterweights and cylindrical counterweights, is positioned by the adsorber for the soft packaging layer, and can be further fixed by the Y-shaped connecting rope, spring chuck and flexible connector, which is beneficial to improving the comprehensive utilization rate of the information storage medium and has strong practicability.

[0017] 2. The counterweight detection device for a crane provided by the present invention. The Y-shaped connecting rope not only serves as a connecting structure for installing the information storage medium on the counterweight, but also serves as a detection element for crack detection. Moreover, the pulling rope serves as a detection element in another direction, and the tension sensor detects in real time the changes in the length, width and height dimensions of all counterweights to achieve the purpose of crack detection, which is beneficial to improving the safety of construction operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained according to these drawings without creative efforts.

[0019] Figure 1 The front view of the counterweight detection device for a crane provided for the embodiment;

[0020] Figure 2 The front view of the counterweight detection device for a crane (without the crane) provided for the embodiment;

[0021] Figure 3 The axonometric view of the counterweight detection device for a crane (without the crane) provided for the embodiment;

[0022] Figure 4 Axonometric view of the counterweight detection device (without crane) provided for the embodiment in another direction;

[0023] Figure 5 Exploded view of the information storage medium, adsorber, fixator, Y-shaped connecting rope, flexible connector and spring chuck;

[0024] Figure 6 For Figure 4 Enlarged schematic view of structure A in

[0025] Figure 7 For Figure 4 Enlarged schematic view of structure B in

[0026] Figure 8 Cross-sectional view of the information storage medium, adsorber, fixator, Y-shaped connecting rope;

[0027] Figure 9 Axonometric view of the tension sensor and the extension arm;

[0028] Figure 10 Working drawing of the information storage medium, adsorber, fixator, Y-shaped connecting rope, flexible connector and spring chuck;

[0029] In each of the above figures: 1. Crane; 2. Counterweight box; 3. Counterweight; 4. Information storage medium; 41. Soft packaging layer; 411. Silica gel sheet; 412. Concave surface; 413. Grid groove; 414. U-shaped opening; 42. Electronic tag chip; 43. Connecting hole; 5. Reader; 6. Adsorber; 61. Negative pressure suction cup; 62. Stud; 7. Fixator; 71. Annular groove; 72. Flange hole; 8. Y-shaped connecting rope; 9. Flexible connector; 91. Soft sleeve; 92. Connecting joint; 93. Through hole; 10. Spring chuck; 11. Tension sensor; 111. Tension end; 12. Pulling rope; 13. Quick gripper; 131. Gripping sleeve; 132. Gripping opening; 133. Positioning pin; 14. C-shaped card; 141. Positioning hole; 15. Extension arm; 151. Radial hole; 152. Spiral groove. Detailed implementation manners

[0030] In order to more clearly understand the above objects, features and advantages of the present invention, the present invention will be further described below with reference to the drawings and embodiments. It should be noted that, without conflict, the embodiments of the present application and the features in the embodiments may be combined with each other. For the convenience of narration, words such as "upper", "lower", "left" and "right" as used hereinafter only indicate the same directions as the upper, lower, left and right directions of the drawings themselves, and do not limit the structure.

[0031] In the following description, numerous specific details are set forth to provide a thorough understanding of the present invention. However, the present invention may be practiced in other ways different from those described herein. Therefore, the present invention is not limited by the limitations of the specific embodiments disclosed in the following specification.

[0032] Examples, such as Figures 1-10 As shown, the counterweight detection device for a crane provided by the present invention includes a crane 1. An open-structured counterweight box 2 is provided at the tail of the crane 1. A plurality of counterweights 3 are arranged inside the counterweight box 2. An information storage medium 4 is provided on the counterweight 3. A reader 5 for wireless communication with the information storage medium 4 is provided at a position of the crane 1 close to the counterweight box 2. The information storage medium 4 includes a soft packaging layer 41. An electronic tag chip 42 is provided at the center inside the soft packaging layer 41. Four pairwise symmetric connection holes 43 are provided at positions close to the edge of the soft packaging layer 41. An adsorber 6 is provided in the connection holes 43. The adsorber 6 includes a negative pressure suction cup 61. A stud 62 is provided at one end of the negative pressure suction cup 61 facing away from its adsorption surface. A fixer 7 threadedly connected to the stud 62 is provided on the stud 62. There are four fixers 7 in total and they are divided into two pairs, left and right. A Y-shaped connecting rope 8 is provided on each pair of fixers 7. One end of one of the Y-shaped connecting ropes 8 is provided with a flexible connector 9. The flexible connector 9 includes a soft sleeve 91. The soft sleeve 91 can be welded to the Y-shaped connecting rope 8 by using a copper sleeve with a certain toughness. A plurality of connection nodes 92 distributed along its length direction are provided on the soft sleeve 91. The connection nodes 92 are in a triangular prism structure and through holes 93 are provided at positions close to their edges. The other end of the other Y-shaped connecting rope 8 is provided with a spring chuck 10 for engaging and cooperating with the through holes 93. The length of the spring chuck 10 is less than the distance between adjacent connection nodes 92. A tension sensor 11 is provided at the uppermost part of all the counterweights 3. The tension sensor 11 is wirelessly communicatively connected to the control room of the crane 1. The tension sensor 11 includes two tension ends 111. A pulling rope 12 distributed in the up and down direction around all the counterweights 3 is provided between the two tension ends 111. A plurality of quick grippers 13 for clamping and cooperating with the Y-shaped connecting ropes 8 are provided on the pulling rope 12.

[0033] Specifically, the electronic tag chip 42 is a chip that contains / writes the re-assembly status of the balance weight. The chip has a certain toughness. In the present invention, the electronic tag chip 42 is installed in the soft packaging layer 41 in an embedded manner. The soft packaging layer 41 and the electronic tag chip 42 have good adhesiveness, especially can cooperate with the side plane of the prismatic counterweight 3 and the side curved surface of the cylindrical counterweight 3. Further, the adsorber 6 on the soft packaging layer 41 can provide a fulcrum for adsorbing the side of the counterweight 3, and the fixator 7 clamps the soft packaging layer 41 on the adsorber 6. At the same time, the fixator 7 provides a connection point 92 for the Y-shaped connecting rope 8. The Y-shaped connecting rope 8 is distributed around the counterweight 3 for one week, and then the joint is completed with the flexible connector 9 through the spring chuck 10, thereby realizing the fixation of the soft packaging layer 41. The soft packaging layer 41 can be flexibly disassembled and replaced and is suitable for counterweights 3 of mainstream shapes, with good installation flexibility and strong practicability, which is beneficial to improving the comprehensive utilization rate of the device. Regarding the spring chuck 10 and the flexible connector 9, the multi-segment connecting joints 92 of the flexible connector 9 can effectively adhere to the side of the counterweight 3. The design of its prismatic shape, on the one hand, improves the contact stability with the side of the counterweight 3, and on the other hand, can provide connecting holes 43 in multiple dimensions for the spring chuck 10 to continuously penetrate. Especially when the length of the Y-shaped connecting rope 8 connected by the spring chuck 10 is relatively long, after the spring chuck 10 penetrates through multiple different connecting holes 43, it can finally be stably stuck at the end of a certain connecting joint 92, thereby completing the installation of the information storage medium 4.

[0034] Regarding the detection ability of the cracks of the counterweight 3 of this device, the Y-shaped connecting rope 8 provided by the present invention not only serves as a connecting structure for installing the information storage medium 4 on the counterweight 3, but also serves as a detection element for crack detection. Moreover, the pull rope 12 serves as a detection element in another direction. The two tension ends 111 of the tension sensor 11 are actually restricted by all the counterweights 3 in the horizontal and vertical directions. Therefore, the tension sensor 11 can detect in real time the changes in the length, width, and height dimensions of all the counterweights 3. If the change in the tension value of the tension sensor 11 exceeds a certain range, since the counterweight 3 is generally fixed in the counterweight 2 box or on the counterweight base, it is basically excluded that the counterweight 3 has a large-area displacement. Most likely, the counterweight 3 has cracks, and the operator's cab of the crane 1 can choose to stop the operation to ensure the safety of the engineering construction operation.

[0035] As Figure 5 and Figure 8 As shown, in order to facilitate the connection between the Y-shaped connecting rope 8 and the fixator 7, the side of the fixator 7 provided by the present invention is provided with an annular groove 71, and both ends of the Y-shaped connecting rope 8 are provided with C-shaped cards 14 that are clamped with the annular groove 71. The opening of the C-shaped card 14 is used to clamp the annular groove 71. During the process of its opening being inserted, the opening can be gradually expanded and quickly clamped on the fixator 7, thereby establishing an effective connection relationship between the two ends of the Y-shaped connecting rope 8 and the fixator 7.

[0036] As Figure 5 shown, in order to improve the connection reliability between the Y-shaped connecting rope 8 and the holder 7, the C-shaped card 14 provided by the present invention is provided with a plurality of uniformly distributed positioning holes 141, and the end of the holder 7 is provided with flange holes 72 corresponding to the positioning holes 141 one by one. A positioning screw is provided in the flange hole 72 and the positioning hole 141. The holder 7 and the C-shaped card 14 can be further fixed by the positioning bolt, preventing the C-shaped card 14 from detaching from the holder 7 due to excessive tension of the Y-shaped connecting rope 8.

[0037] As Figure 5 and Figure 8 shown, in order to improve the utilization rate of the information storage medium 4, the soft packaging layer 41 provided by the present invention includes a circular silica gel sheet 411. The silica gel sheet 411 is oil-resistant and corrosion-resistant. One side of the silica gel sheet 411 in the same direction as the adsorption surface of the negative pressure suction cup 61 is a concave surface 412, and the other side of the silica gel sheet 411 is provided with a grid groove 413. The distribution position of the grid groove 413 corresponds to that of the electronic tag chip 42. The distribution area of the grid groove 413 is larger than the area of the electronic tag chip 42. The grid groove 413 is used to improve the bending toughness of the silica gel sheet 411. In this way, the soft packaging layer 41 not only has sufficient toughness to enable it and the electronic tag chip 42 to obtain a shape matching the side surface of the counterweight 3, but also can generate a certain negative pressure after being closely attached to the counterweight 3. Coupled with the adsorption effect of the negative pressure suction cup 61 and the tensioning effect of the Y-shaped connecting rope 8, the cooperation performance between the information storage medium 4 and the counterweight 3 with the mainstream shape can be effectively guaranteed, eliminating the need for bolt connection and glue bonding. Therefore, the utilization rate of the information storage medium 4 can be improved without affecting the real-time operation of the crane 1.

[0038] Furthermore, as Figure 5 shown, a pair of U-shaped openings 414 are provided at the edge of the silica gel sheet 411 provided by the present invention. The U-shaped openings 414 provide shear openings. When the silica gel sheet 411 is attached to the side surface of the counterweight 3, especially when the side surface of the counterweight 3 is a cylindrical curved surface, the situation of the silica gel sheet 411 bulging is reduced, enabling the silica gel sheet 411 to better adhere to the counterweight 3.

[0039] Considering that the tension end 111 of the tension sensor 11 is generally a threaded structure, in order to facilitate fixing the pull rope 12 to the tension end 111, as Figure 3 and Figure 9As shown in the figure, both tensile ends 111 of the tensile sensor 11 provided by the present invention are threadedly connected with an extension arm 15. The extension arm 15 is of a tubular structure and has a plurality of radial holes 151 on its side for connecting the pull rope 12. One end of the extension arm 15 is connected to the tensile sensor 11 by threads, and the radial holes 151 on the extension arm 15 are used for threading the pull rope 12. After the pull rope 12 is threaded through a plurality of radial holes 151 at different positions, it can be wound around the extension arm 15, thereby realizing the fixed connection between the movable end of the pull rope 12 and the tensile end 111 of the tensile sensor 11.

[0040] As Figure 9 shown in the figure, in order to improve the connection reliability of the end of the pull rope 12, the extension arm 15 provided by the present invention is provided with a spiral groove 152 at a position far from the tensile sensor 11. After the pull rope 12 passes through a plurality of radial holes 151, it can be wound along the spiral groove 152 and finally tied a knot outside the spiral groove 152 to complete the fixation, which is simple to operate and has relatively high connection reliability.

[0041] As Figure 7 shown in the figure, in order to improve the connection performance between the quick gripper 13 and the Y-shaped connecting rope 8, the quick gripper 13 provided by the present invention includes a clamping sleeve 131, and the side of the clamping sleeve 131 is provided with a clamping port 132 for cooperating with the Y-shaped connecting rope 8. The clamping sleeve 131 can clamp the Y-shaped connecting rope 8 through the clamping port 132. When the counterweight 3 has obvious cracks, it will expand to a certain extent, thereby driving the Y-shaped connecting rope 8 to have a sliding friction with the clamping port 132, and then driving the pull rope 12 to generate a change in the tensile force value at the tensile end 111 of the tensile sensor 11, so as to achieve the purpose of real-time detecting the cracks of the counterweight 3.

[0042] In order to improve the stability of the clamping sleeve 131 on the pull rope 12, the side of the clamping sleeve 131 provided by the present invention is provided with a positioning pin 133 for cooperating with the pull rope 12. The end of the positioning pin 133 abuts against the side of the pull rope 12 by means of pressurization. The pull rope 12 and the positioning pin 133 will not expand within a certain pressure range, so the relative stability of the clamping sleeve 131 on the pull rope 12 can be improved.

[0043] In order to improve the working performance of the Y-shaped connecting rope 8 and the pull rope 12, both the Y-shaped connecting rope 8 and the pull rope 12 provided by the present invention are steel ropes, and a thermoplastic sheath is provided outside the steel ropes. For the positions where the Y-shaped connecting rope 8 and the pull rope 12 need to be knotted, the thermoplastic sheath of this section can be cut off, and the internal steel rope is retained for subsequent perforation and knotting operations; for the steel ropes with the thermoplastic sheath retained, on the one hand, good wear resistance can be obtained, and at the nodes that need to be clamped, such as the clamping node between the clamping port 132 and the Y-shaped connecting rope 8, a certain frictional force can be maintained, thereby improving the sensitivity of the device when performing the detection function.

[0044] The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention in other forms. Any person skilled in the art may use the technical content disclosed above to make changes or modifications into equivalent embodiments with equivalent changes and apply them to other fields. However, as long as it does not depart from the technical solution content of the present invention, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention still fall within the protection scope of the technical solution of the present invention.

Claims

1. A counterweight detection device for a crane, including a crane. An open-structured counterweight box is provided at the tail of the crane. A plurality of counterweights are arranged inside the counterweight box. An information storage medium is provided on the counterweight. A reader that communicates wirelessly with the information storage medium is provided at a position of the crane close to the counterweight box. It is characterized in that, The information storage medium includes a flexible packaging layer, an electronic tag chip is disposed at the inner center of the flexible packaging layer, four symmetrically arranged connection holes are provided at positions near the edge of the flexible packaging layer, an adsorber is disposed in the connection holes, the adsorber includes a negative pressure suction cup, a stud is provided at one end of the negative pressure suction cup facing away from its adsorption surface, a fixator threadedly connected thereto is provided on the stud, there are four fixators in total and they are divided into two pairs on the left and right, a Y-shaped connecting rope is provided on each pair of fixators, a flexible connector is provided at the end of one of the Y-shaped connecting ropes, the flexible connector includes a soft sleeve, a plurality of connecting nodes distributed along its length direction are provided on the soft sleeve, the connecting nodes are in a triangular prism structure and through holes are provided at positions near their edges, a spring chuck for passing through and mating with the through holes is provided at the end of the other Y-shaped connecting rope, the length of the spring chuck is less than the distance between adjacent connecting nodes, a tension sensor is provided at the uppermost part of all counterweights, the tension sensor is wirelessly communicatively connected to the control room of the crane, the tension sensor includes two tension ends, a pulling rope distributed in the up and down direction around all counterweights is provided between the two tension ends, and a plurality of quick clamps for clamping and mating with the Y-shaped connecting rope are provided on the pulling rope.

2. The counterweight detection device for a crane according to claim 1, characterized in that An annular groove is provided on the side surface of the fixator, and C-shaped cards for snap-fitting with the annular groove are provided at both ends of the Y-shaped connecting rope.

3. The balance weight detection device for a crane according to claim 2, characterized in that, A plurality of uniformly distributed positioning holes are provided on the C-shaped card, flange holes corresponding to the positioning holes one by one are provided at the end of the fixator, and positioning screws are provided in the flange holes and the positioning holes.

4. The counterweight detection device for a crane according to claim 3, characterized in that, The flexible packaging layer includes a circular silica gel sheet, one side of the silica gel sheet in the same direction as the adsorption surface of the negative pressure suction cup is a concave surface, a grid groove is provided on the other side of the silica gel sheet, the grid groove corresponds to the distribution position of the electronic tag chip, the distribution area of the grid groove is larger than the area of the electronic tag chip, and the grid groove is used to improve the bending toughness of the silica gel sheet.

5. The counterweight detection device for a crane according to claim 4, characterized in that, A pair of U-shaped openings are provided at the edge of the silica gel sheet.

6. The counterweight detection device for a crane according to any one of claims 1 to 5, characterized in that, A lengthening arm is threadedly connected to each of the two tension ends of the tension sensor, the lengthening arm is in a tubular structure and a plurality of radial holes for connecting the pulling rope are provided on its side surface.

7. The counterweight detection device for a crane according to claim 6, characterized in that, A spiral groove is provided at a position of the lengthening arm far from the tension sensor, and the spiral groove is used for knotting and fixing the end of the pulling rope.

8. The counterweight detection device for a crane according to claim 7, characterized in that, The quick clamp includes a clamping sleeve, and a clamping opening for mating with the Y-shaped connecting rope is provided on the side surface of the clamping sleeve.

9. The counterweight detection device for a crane according to claim 8, wherein, A positioning pin for mating with the pulling rope is provided on the side surface of the clamping sleeve.

10. The counterweight detection device for a crane according to claim 1, characterized in that, Both the Y-shaped connecting rope and the pulling rope are steel ropes, and a thermoplastic sheath is provided on the outer surface of the steel ropes.

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