Balancing weight detection equipment of crane

Abstract

The invention belongs to the technical field of special equipment detection, and provides a crane counterweight detection device, which comprises a crane, a counterweight box, a plurality of counterweights, an information storage medium and a reader, and is characterized in that the information storage medium comprises a flexible package layer, an electronic tag chip and four pairwise symmetrical connecting holes, and adsorbers and fixers are arranged in the connecting holes; a Y-shaped connecting rope is arranged on each pair of fixing devices, a flexible connector is arranged at the end of one Y-shaped connecting rope, a spring chuck used for being connected and matched with the flexible connector in a penetrating mode is arranged at the end of the other Y-shaped connecting rope, a tension sensor is arranged on the uppermost portion of all the balance weights, and a tension sensor is arranged on the other side of the tension sensor. A pull rope distributed in the vertical direction around all the counterweights is arranged between the two tension ends of the tension sensor, and a rapid clamping device matched with the Y-shaped connecting rope in a clamping mode is arranged on the pull rope. The device is reasonable in design, simple in structure, convenient to install, capable of detecting the balance weight crack condition in real time, high in practicability and suitable for large-scale popularization.

Description

Technical Field

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

[0002] A crane is a multi-action lifting machine that uses a hook or other lifting device to hang heavy objects, lift them vertically and move them horizontally within a certain range. It is also called a crane. A crane completes cargo loading and unloading or equipment installation operations in a repeated short working cycle. A working cycle includes picking up objects, lifting cargo, horizontal movement, descending, unloading, and then returning the empty sling to its original position. The main function of the crane counterweight is to increase the stability of the crane and ensure that it will not overturn due to the tipping moment during the lifting operation, thereby ensuring better operating balance. Before the crane is operated, the counterweight needs to be installed in strict accordance with the position specified in the crane manual to ensure that the center of gravity distribution of the counterweight and the crane meets the design requirements. The inspection content of the counterweight generally includes the weight, size, quantity and presence of obvious cracks of the counterweight.

[0003] Existing patent CN100584733C discloses a counterweight detection device for a crane and a crane with the counterweight detection device, the device includes a base machine with a lower traveling body and an upper rotating body; counterweights mounted on the base machine; ID (identification) tags mounted on each counterweight, in which ID information about the assembly status of the counterweight has been written; and an ID reader for reading the ID information, the assembly status of the counterweight is detected by wireless communication between the ID reader and the ID tag. The device can complete some of the most basic detection contents, such as the number and weight of counterweights, through wireless communication. However, the problem with this equipment is that the identification information storage medium is generally packaged in a hard-mounted manner. When installing it on the counterweight, it needs to be installed by pasting or screwing. This is suitable for counterweights with prismatic structures. For counterweights with cylindrical structures, the identification information storage medium lacks an effective installation plane, so it is not convenient to install. Furthermore, in addition to the basic information, the problem with the counterweight in actual use is most likely to be cracks. Generally, the counterweight is inspected on the ground and installed and then no longer inspected. In addition, for cranes in working condition, real-time detection is not convenient. Once cracks occur and are not detected in time, the risk factor of construction operations will increase. Summary of the invention

[0004] In view of the technical problems existing in the above-mentioned crane and its counterweight, the present invention proposes a counterweight detection device for a crane which has a reasonable design, a simple structure, is easy to install, can detect counterweight cracks in real time and has strong practicality.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is that the balance weight detection equipment of the crane provided by the present invention includes a crane, a counterweight box with an open structure is arranged 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, and the crane is provided with a reader which communicates with the information storage medium through wireless communication at a position close to the counterweight box, the information storage medium includes a soft packaging layer, an electronic tag chip is arranged at the inner center of the soft packaging layer, the soft packaging layer is provided with 4 symmetrical connecting holes in pairs near its edge, an adsorber is arranged in the connecting hole, the adsorber includes a negative pressure suction cup, a stud is arranged at the end of the negative pressure suction cup facing away from its adsorption surface, a fixer which is threadedly connected to the stud is arranged on the stud, and the fixer has a total of four And it is divided into two pairs, left and right, each pair of fixers is provided with a Y-shaped connecting rope, one end of one of the Y-shaped connecting ropes is provided with a flexible connector, the flexible connector includes a soft sleeve, the soft sleeve is provided with a plurality of connecting sections distributed along its length direction, the connecting section is a triangular prism structure and a through hole is provided near its edge, the other end of the Y-shaped connecting rope is provided with a spring clamp for engaging with the through hole, the length of the spring clamp is less than the spacing between adjacent connecting sections, a tension sensor is provided at the top of all counterweights, the tension sensor is wirelessly connected to the control room of the crane, the tension sensor includes two tension ends, a pull rope distributed in the up and down directions around all counterweights is provided between the two tension ends, and the pull rope is provided with a plurality of quick clamps for clamping and cooperating with the Y-shaped connecting rope.

[0006] Preferably, an annular groove is provided on the side of the fixer, and C-shaped cards that are engaged with the annular groove are provided at both ends of the Y-shaped connecting rope.

[0007] Preferably, the C-shaped card is provided with a plurality of evenly distributed positioning holes, the end of the fixture is provided with flange holes corresponding to the positioning holes one by one, and positioning screws are provided in the flange holes and the positioning holes.

[0008] Preferably, the soft packaging layer includes a circular silicone sheet, the side of the silicone sheet in the same direction as the adsorption surface of the negative pressure suction cup is concave, and the other side of the silicone sheet is provided with a grid groove, 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 silicone sheet.

[0009] Preferably, a pair of U-shaped openings are provided at the edge of the silicone sheet.

[0010] Preferably, both tension ends of the tension sensor are threadedly connected to an extension arm, the extension arm is a tubular structure and a plurality of radial holes for connecting a pull rope are arranged on its side.

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

[0012] Preferably, the quick clamp comprises a clamping sleeve, and a side surface of the clamping sleeve is provided with a clamping opening that cooperates with the Y-shaped connecting rope.

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

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

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

[0016] 1. The counterweight detection device for a crane provided by the present invention embeds the electronic tag chip in a soft packaging layer. The soft packaging layer and the electronic tag chip have good adhesion and can be matched with a prismatic counterweight and a cylindrical counterweight. The soft packaging layer is positioned by an absorbent and can be further fixed by a Y-shaped connecting rope, a spring clamp and a flexible connector, which is beneficial to improving the comprehensive utilization rate of information storage media and has strong practicality.

[0017] 2. In 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 an information storage medium on the counterweight, but also serves as a detection element for crack detection. The pull rope serves as a detection element in another direction, and the tension sensor detects changes in the length, width, and height of all counterweights in real time 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 briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 A front view of a counterweight detection device for a crane provided in an embodiment;

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

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

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

[0023] Figure 5 An exploded view of an information storage medium, an absorber, a fixer, a Y-type connecting rope, a flexible connector and a spring clamp;

[0024] Figure 6 for Figure 4 A magnified schematic diagram of the structure in the middle;

[0025] Figure 7 for Figure 4 A magnified schematic diagram of structure B in the middle;

[0026] Figure 8 It is a cross-sectional view of the information storage medium, the absorber, the fixer, and the Y-shaped connecting rope;

[0027] Fig. 9 This is the axonometric view of the tension sensor and the extension arm;

[0028] Fig.10 Working diagram for information storage medium, absorber, holder, Y-type connecting rope, flexible connector and spring clamp;

[0029] In the above figures: 1. crane; 2. counterweight box; 3. counterweight; 4. information storage medium; 41. soft packaging layer; 411. silicone sheet; 412. concave surface; 413. grid groove; 414. U-shaped mouth; 42. electronic tag chip; 43. connecting hole; 5. reader; 6. adsorber; 61. negative pressure suction cup; 62. stud; 7. fixture; 71. annular groove; 72. flange hole; 8. Y-type connecting rope; 9. flexible connector; 91. soft sleeve; 92. connecting section; 93. through hole; 10. spring chuck; 11. tension sensor; 111. tension end; 12. pull rope; 13. quick clamp; 131. clamping sleeve; 132. clamping mouth; 133. positioning pin; 14. C-type card; 141. positioning hole; 15. extension arm; 151. radial hole; 152. spiral groove. DETAILED DESCRIPTION

[0030] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention is further described below in conjunction with the accompanying drawings and embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict. For the convenience of description, if the words "upper", "lower", "left" and "right" appear below, they only indicate that the upper, lower, left and right directions are consistent with the accompanying drawings themselves, and do not limit the structure.

[0031] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways than those described herein. Therefore, the present invention is not limited to the specific embodiments of the following disclosure.

[0032] Examples, such as Figure 1-Figure 10 As shown, the counterweight detection device for a crane provided by the present invention comprises a crane 1, wherein a counterweight box 2 with an open structure is arranged 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 arranged on the counterweight 3, and a reader 5 which communicates with the information storage medium 4 through wireless communication is arranged at a position close to the counterweight box 2 of the crane 1. The information storage medium 4 includes a soft packaging layer 41, an electronic tag chip 42 is arranged at the inner center of the soft packaging layer 41, and four symmetrical connection holes 43 are arranged near the edge of the soft packaging layer 41, and an absorber 6 is arranged in the connection hole 43. The absorber 6 includes a negative pressure suction cup 61, and the negative pressure suction cup 61 is provided with a stud 62 at the end facing away from the adsorption surface thereof, and a fixer 7 threadedly connected to the stud 62 is arranged on the stud 62. There are four fixers 7 in total and they are divided into two pairs on the left and right. Each pair of fixers 7 is provided with a Y-shaped connecting rope 8, and a flexible connector 9 is provided at the end of one of the Y-shaped connecting ropes 8. The flexible connector 9 includes a soft sleeve 91, and the soft sleeve 91 can be welded on the Y-shaped connecting rope 8 by a copper sleeve with a certain toughness. The soft cover 91 is provided with a plurality of connection sections 92 distributed along its length direction. The connection section 92 is a triangular prism structure and is provided with a through hole 93 near its edge. The end of another Y-shaped connection rope 8 is provided with a spring clamp 10 for engaging with the through hole 93. The length of the spring clamp 10 is less than the spacing between adjacent connection sections 92. A tension sensor 11 is provided at the top of all counterweights 3. The tension sensor 11 is wirelessly connected to the control room of the crane 1. The tension sensor 11 includes two tension ends 111. A pull rope 12 distributed in the up and down directions around all counterweights 3 is provided between the two tension ends 111. The pull rope 12 is provided with a plurality of quick clamps 13 for clamping with the Y-shaped connection rope 8.

[0033] Specifically, the electronic tag chip 42 is a chip that contains / writes the assembly status of the counterweight. The chip has a certain toughness, and the present invention installs the electronic tag chip 42 in the soft packaging layer 41 in an embedded manner. The soft packaging layer 41 together with the electronic tag chip 42 has good adhesion, especially can be matched 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 adsorption with the side of the counterweight 3, and the soft packaging layer 41 is clamped on the adsorber 6 by the fixer 7. At the same time, the fixer 7 provides a connection node 92 with the Y-shaped connecting rope 8, and the Y-shaped connecting rope 8 is distributed around the counterweight 3 for a week, and then the joint is completed by the spring clamp 10 and the flexible connector 9, thereby realizing the fixation of the soft packaging layer 41. The soft packaging layer 41 can be flexibly replaced and is suitable for mainstream shapes of counterweights 3. It has good installation flexibility and strong practicality, which is conducive to improving the comprehensive utilization rate of the device. Regarding the spring clamp 10 and the flexible connector 9, the multi-segment connecting section 92 of the flexible connector 9 can be effectively abutted against the side of the counterweight 3. Its triangular prism shape design, 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 of multiple dimensions for the spring clamp 10 to be continuously connected. In particular, when the length of the Y-shaped connecting rope 8 connected to the spring clamp 10 is relatively long, the spring clamp 10 can be stably stuck at the end of a connecting section 92 after being connected with multiple different connecting holes 43, thereby completing the installation of the information storage medium 4.

[0034] Regarding the ability of the present device to detect cracks in the counterweight 3, 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. The pull rope 12 serves as a detection element in the other direction. The two tension ends 111 of the tension sensor 11 are actually restrained by all the counterweights 3 in the horizontal and vertical directions. Therefore, the tension sensor 11 can detect changes in the length, width, and height dimensions of all the counterweights 3 in real time. If the tension value of the tension sensor 11 changes beyond a certain range, since the counterweight 3 is generally fixed in the counterweight 2 box or on the counterweight base, it is basically ruled out that the counterweight 3 has a large-area displacement, and there is a high probability that the counterweight 3 has a crack. The control room of the crane 1 can choose to stop the operation to ensure the safety of the construction operation.

[0035] like Figure 5 and Figure 8 As shown, in order to facilitate the connection between the Y-shaped connecting rope 8 and the fixing device 7, the side of the fixing device 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 engaged with the annular groove 71. The opening of the C-shaped card 14 is used to engage with the annular groove 71, and during the process of the opening being engaged, the opening can be gradually opened and quickly engaged with the fixing device 7, thereby establishing an effective connection relationship between the two ends of the Y-shaped connecting rope 8 and the fixing device 7.

[0036] like Figure 5 As shown, in order to improve the connection reliability between the Y-shaped connecting rope 8 and the fixing device 7, the C-shaped card 14 provided by the present invention is provided with a plurality of evenly distributed positioning holes 141, and the end of the fixing device 7 is provided with a flange hole 72 corresponding to the positioning holes 141 one by one, and positioning screws are provided in the flange hole 72 and the positioning hole 141. The fixing device 7 and the C-shaped card 14 can be further fixed by the positioning bolts to prevent the C-shaped card 14 from being separated from the fixing device 7 due to excessive tension of the Y-shaped connecting rope 8.

[0037] like Figure 5 and Figure 8 As 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 silicone sheet 411, which is oil-resistant and corrosion-resistant, and the side of the silicone 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 silicone sheet 411 is provided with a grid groove 413, and the grid groove 413 corresponds to the distribution position of the electronic tag chip 42, and the distribution area of ​​the grid groove 413 is larger than the area of ​​the electronic tag chip 42, and the grid groove 413 is used to improve the bending toughness of the silicone 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 of the counterweight 3, but also can generate a certain negative pressure with the counterweight 3 after being closely attached, and coupled with the adsorption effect of the negative pressure suction cup 61 and the tensioning effect of the Y-shaped connecting rope 8, it can effectively ensure the matching performance of the information storage medium 4 and the mainstream shape of the counterweight 3, without bolt connection and glue bonding, so that the utilization rate of the information storage medium 4 can be improved, and the real-time operation of the crane 1 is not affected.

[0038] Furthermore, if Figure 5 As shown, the edge of the silicone sheet 411 provided by the present invention is provided with a pair of U-shaped openings 414, and the U-shaped openings 414 provide shear openings. When the silicone sheet 411 is attached to the side of the counterweight 3, especially when the side of the counterweight 3 is a cylindrical surface, the bulging of the silicone sheet 411 is reduced, so that the silicone sheet 411 can be better attached 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 shown in FIG. Figure 3 and Fig. 9As shown, the two tension ends 111 of the tension sensor 11 provided by the present invention are both threadedly connected to an extension arm 15, and the extension arm 15 is 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 tension sensor 11 through a thread, and the radial holes 151 on the extension arm 15 are used to pass the pull rope 12, and the pull rope 12 can be wound around the extension arm 15 after passing through the radial holes 151 at different positions, thereby realizing a fixed connection between the movable end of the pull rope 12 and the tension end 111 of the tension sensor 11.

[0040] like Fig. 9 As shown, in order to improve the connection reliability of the end of the pull rope 12, the extended arm 15 provided by the present invention is provided with a spiral groove 152 at a position away from the tension sensor 11. After passing through a plurality of radial holes 151, the pull rope 12 can be wound along the spiral groove 152 and finally tied outside the spiral groove 152 to complete the fixation. The operation is simple and the connection reliability is high.

[0041] like Figure 7 As shown, in order to improve the connection performance between the quick clamp 13 and the Y-shaped connecting rope 8, the quick clamp 13 provided by the present invention includes a clamping sleeve 131, and a clamping opening 132 that cooperates with the Y-shaped connecting rope 8 is provided on the side of the clamping sleeve 131. The clamping sleeve 131 can clamp the Y-shaped connecting rope 8 through the clamping opening 132, and the counterweight 3 will expand to a certain extent when obvious cracks appear, thereby driving the Y-shaped connecting rope 8 and the clamping opening 132 to generate sliding friction, and then driving the pull rope 12 to generate a change in the tension value at the tension end 111 of the tension sensor 11, thereby achieving the purpose of real-time detection of cracks in 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 that cooperates with the pull rope 12. The end of the positioning pin 133 is pressed against the side of the pull rope 12. 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, the Y-shaped connecting rope 8 and the pull rope 12 provided by the present invention are both steel ropes, and a thermoplastic sheath is provided on the outside of the steel rope. For the positions where the Y-shaped connecting rope 8 and the pull rope 12 need to be knotted, the thermoplastic sheath of the section can be cut off, and the steel rope inside can be retained for subsequent perforation and knotting operations; for the steel rope with the thermoplastic sheath retained, on the one hand, better wear resistance can be obtained, and a certain friction force can be maintained at the nodes that need to be clamped, such as the clamping node of the clamping port 132 and the Y-shaped connecting rope 8, thereby improving the sensitivity of the device when performing the detection function.

[0044] The above description is only a preferred embodiment of the present invention and does not limit the present invention in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes and apply it to other fields. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. A crane counterweight detection device, comprising a crane, wherein a counterweight box with an open structure is arranged 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, and a reader is arranged at a position close to the counterweight box to communicate with the information storage medium through wireless communication, characterized in that: The information storage medium comprises a soft packaging layer, an electronic tag chip is arranged at the inner center of the soft packaging layer, the soft packaging layer is provided with 4 symmetrical connection holes near its edge, an absorber is arranged in the connection hole, the absorber comprises a negative pressure suction cup, the negative pressure suction cup is provided with a stud at the end facing away from its adsorption surface, a fixer threadedly connected to the stud is arranged on the stud, there are four fixers in total and divided into two pairs on the left and right, each pair of fixers is provided with a Y-shaped connection rope, a flexible connector is arranged at the end of one of the Y-shaped connection ropes, the flexible connector comprises a soft sleeve, and the soft sleeve is provided with There are multiple connecting sections distributed along its length direction, and the connecting sections are in a triangular prism structure and are provided with through holes near their edges. The end of another Y-shaped connecting rope is provided with a spring clamp for engaging with the through hole, and the length of the spring clamp is less than the spacing between adjacent connecting sections. A tension sensor is provided at the top of all counterweights, and the tension sensor is wirelessly connected to the control room of the crane. The tension sensor includes two tension ends, and a pull rope distributed in the up and down directions around all counterweights is provided between the two tension ends. The pull rope is provided with multiple quick clamps for clamping with the Y-shaped connecting rope.

2. The crane counterweight detection device according to claim 1, characterized in that: An annular groove is arranged on the side of the fixer, and C-shaped cards which are engaged with the annular groove are arranged at both ends of the Y-shaped connecting rope.

3. The crane counterweight detection device according to claim 2, characterized in that: The C-shaped card is provided with a plurality of evenly distributed positioning holes, the end of the fixer is provided with flange holes corresponding to the positioning holes one by one, and positioning screws are provided in the flange holes and the positioning holes.

4. The crane counterweight detection device according to claim 3, characterized in that: The soft packaging layer includes a circular silicone sheet, the side of the silicone sheet in the same direction as the adsorption surface of the negative pressure suction cup is a concave surface, and the other side of the silicone sheet is provided with a grid groove, 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 silicone sheet.

5. The crane counterweight detection device according to claim 1, characterized in that: A pair of U-shaped openings are arranged at the edge of the silicone sheet.

6. The crane counterweight detection device according to any one of claims 1 to 5, characterized in that: Both tension ends of the tension sensor are threadedly connected with an extension arm, and the extension arm is a tubular structure and a plurality of radial holes for connecting a pull rope are arranged on its side.

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

8. The crane counterweight detection device according to claim 7, characterized in that: The quick clamp comprises a clamping sleeve, and a clamping opening matched with the Y-shaped connecting rope is arranged on the side of the clamping sleeve.

9. The crane counterweight detection device according to claim 8, characterized in that: A positioning pin cooperating with the draw cord is arranged on the side of the clamping sleeve.

10. The crane counterweight detection device according to claim 1, characterized in that: The Y-shaped connecting rope and the pull rope are both steel ropes, and a thermoplastic sheath is arranged on the outside of the steel rope.

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