Tensioning cylinder, tensioning device and cable tensioning system

Abstract

The application discloses a tensioning oil cylinder, a tensioning device and a cable tensioning system, wherein the tensioning oil cylinder comprises a cylinder barrel, a piston assembly and a piston rod locking assembly; the piston assembly comprises a first piston rod end extending from a first end of the cylinder barrel and a second piston rod end extending from a second end of the cylinder barrel, and the first piston rod end is a cable connecting end; the piston rod locking assembly is arranged at the second end of the cylinder barrel and is used for limiting and locking the second piston rod end; the first piston rod end is retracted, and the cable is gradually tensioned; after the cable is tensioned, the second piston rod end is limited and locked through the piston rod locking assembly; at this time, the reaction force of the cable on the first piston rod end is transmitted to the cylinder barrel through the piston rod locking assembly, and the cylinder barrel further transmits the force to a fixed base, so that the cable is fixed, and the automatic tensioning of the cable can be realized through the tensioning oil cylinder, and especially, the tensioning operation can be more easily and efficiently realized in the case of a larger tensioning force.

Description

Technical Field

[0001] This application belongs to the technical field of tower crane equipment, specifically relating to a tensioning cylinder, a tensioning device, and a cable tensioning system. Background Technology

[0002] For steel tower structures or equipment, such as power towers, communication signal base stations, and tower cranes, tie rods or cable systems are typically added to improve structural stability and rigidity. To ensure the tie rods or cables achieve the required tensile force, a tensioning device is needed to tension them. Existing tensioning devices generally use a mechanical threaded structure, consisting of an upper tie rod, a lower tie rod, and a nut. Both the upper and lower tie rods are screws connected by a nut. Rotating the nut adjusts the relative distance between the upper and lower tie rods, thus loosening or tightening the tie rod system. However, the tension force in this type of device is borne by the threads connecting the screw and the nut. As tensioning progresses, the torque required to rotate the nut increases with the friction on the threaded contact surface, making manual tensioning increasingly difficult. When the tension force reaches a certain value, manual operation becomes impossible. Utility Model Content

[0003] In view of the above-mentioned defects or deficiencies, this application provides a tensioning cylinder, a tensioning device, and a cable tensioning system, which aims to solve the technical problem that the prior art requires manual operation and is not suitable for tie rod systems with large tension forces.

[0004] To achieve the above objectives, the first aspect of this application provides a tensioning device, including a cylinder, a piston assembly, and a piston rod locking assembly; the piston assembly includes a first piston rod end extending from a first end of the cylinder and a second piston rod end extending from a second end of the cylinder, the first piston rod end being a cable connection end; the piston rod locking assembly is disposed at the second end of the cylinder and is used to limit and lock the second piston rod end.

[0005] In this embodiment, the second piston rod end is a threaded connection end, and the piston rod locking assembly includes a tension nut, which is threadedly connected to the second piston rod end and presses against the end face of the cylinder.

[0006] In this embodiment, the piston rod locking assembly further includes a spacer sleeve, which is fitted between the cylinder and the tension nut. The tension nut is used to press the spacer sleeve against the end face of the cylinder.

[0007] In this embodiment, the spacer is sleeve-shaped and includes stop portions at both ends and a central cylindrical section, wherein the outer diameter of the stop portions is larger than the outer diameter of the cylindrical section; and / or, the number of spacers is multiple.

[0008] In this embodiment, the piston rod locking assembly further includes a lock nut, which is threaded to the end of the second piston rod and is located on the side of the tension nut facing away from the cylinder.

[0009] In this embodiment, the tensioning cylinder further includes a rotary drive mechanism disposed on the cylinder barrel, which is used to drive the tensioning nut to move helically along the end of the second piston rod.

[0010] In this embodiment, a first cylinder oil port is provided at the first end of the cylinder barrel, a second cylinder oil port is provided at the second end of the cylinder barrel, a first pressure sensor is provided at the first cylinder oil port, and a second pressure sensor is provided at the second cylinder oil port.

[0011] In this embodiment, the first piston rod end is provided with a plurality of cable connection grooves arranged in parallel at intervals and a cable connection pin hole passing through the plurality of cable connection grooves.

[0012] To achieve the above objectives, a second aspect of this application provides a tensioning device, including a fixed base and the aforementioned tensioning cylinder, wherein the cylinder is hinged to the fixed base.

[0013] To achieve the above objectives, a third aspect of this application provides a cable tensioning system comprising multiple cables, wherein the multiple cables are connected one-to-one to multiple sets of the aforementioned tensioning devices.

[0014] Through the above technical solution, the tensioning cylinder provided in this application embodiment has the following beneficial effects:

[0015] When using the aforementioned tensioning cylinder, the cylinder can be mounted on a corresponding fixed base. The first piston rod end is connected to the cable. Before tensioning the cable, the first piston rod end is fully extended, and the cable is in a slack state. Then, the first piston rod end retracts, and the second piston rod end extends, gradually tensioning the cable. After the cable is tensioned, the second piston rod end is limited and locked by the piston rod locking assembly. At this time, the reaction force of the cable on the first piston rod end is transmitted to the cylinder through the piston rod locking assembly, and the cylinder then transmits the force to the fixed base, thus fixing the cable. Therefore, the tensioning cylinder can achieve automatic tensioning of the cable, especially in scenarios with large tension forces, making the tensioning operation easier and more efficient.

[0016] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description

[0017] The accompanying drawings are provided to illustrate the present application and form part of the specification. They are used together with the following detailed description to explain the present application, but do not constitute a limitation thereof. In the drawings:

[0018] Figure 1 This is a cross-sectional view of a tensioning cylinder according to an embodiment of this application;

[0019] Figure 2This is a top view of a tensioning cylinder according to an embodiment of this application;

[0020] Figure 3 This is a schematic diagram of a rotary drive mechanism according to an embodiment of this application;

[0021] Figure 4 This is a schematic diagram of a cable tensioning system according to an embodiment of this application;

[0022] Figure 5 This is a schematic diagram of a tensioning cylinder according to another embodiment of this application;

[0023] Figure 6 This is a schematic diagram of the female tension plate of the cable according to one embodiment of this application.

[0024] Explanation of reference numerals in the attached figures

[0025] Detailed Implementation

[0026] The specific embodiments of this application will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the scope of this application.

[0027] The tensioning cylinder, tensioning device, and cable tensioning system of this application are described below with reference to the accompanying drawings.

[0028] like Figure 1 As shown, the first aspect of this application provides a tensioning cylinder, comprising:

[0029] Cylinder 1;

[0030] The piston assembly includes a first piston rod end 2 extending from a first end of the cylinder 1 and a second piston rod end 3 extending from a second end of the cylinder 1, wherein the first piston rod end 2 is the connection end of the cable 7;

[0031] The piston rod locking assembly 4 is disposed at the second end of the cylinder 1 and is used to limit and lock the second piston rod end 3.

[0032] When using the aforementioned tensioning cylinder, the cylinder 1 is mounted on the corresponding fixed base 6, and the first piston rod end 2 is connected to the cable 7. Before tensioning the cable 7, the first piston rod end 2 is fully extended, and the cable 7 is in a slack state. Then, the first piston rod end 2 retracts, the second piston rod end 3 extends, and the cable 7 is gradually tensioned. After the cable 7 is tensioned, the second piston rod end 3 is limited and locked by the piston rod locking assembly 4. At this time, the reaction force of the cable 7 on the first piston rod end 2 is transmitted to the cylinder 1 through the piston rod locking assembly 4, and the cylinder 1 transmits the force to the fixed base 6 to fix the cable 7. Thus, the tensioning cylinder can achieve automatic tensioning of the cable 7, especially in scenarios with large tension forces, making the tensioning operation easier and more efficient.

[0033] Specifically, the first piston rod end 2 and the second piston rod end 3 are connected by a piston and move synchronously under hydraulic pressure.

[0034] Furthermore, the cylinder 1 can be provided with a first cylinder oil port 11 at the first end and a second cylinder oil port 12 at the second end. In conjunction with the hydraulic control system, before the tensioning operation, hydraulic oil is introduced into the second cylinder oil port 12 at the second end, so that the first piston rod end 2 is fully extended and the cable 7 is in a relaxed state. When the tensioning operation is performed, hydraulic oil is introduced into the first cylinder oil port 11 at the first end and the second cylinder oil port 12 at the second end returns oil. The first piston rod end 2 gradually retracts and the cable 7 is gradually tensioned.

[0035] In addition, see Figure 5 The cylinder 1 can also be provided with a third cylinder oil port 13 at the first end, and a return spring 83 is provided in the chamber at the second end. Before the tensioning operation, the return spring 83 drives the first piston rod end 2 to extend fully, and the cable 7 is in a relaxed state. When the tensioning operation is performed, hydraulic oil is introduced into the third cylinder oil port 13 at the first end, the first piston rod end 2 gradually retracts, the return spring 83 is compressed, and the cable 7 is gradually tensioned.

[0036] In this embodiment, the second piston rod end 3 is a threaded connection end, and the piston rod locking assembly 4 includes a tension nut 41. The tension nut 41 is threadedly connected to the second piston rod end 3 and presses against the end face of the cylinder 1. The second piston rod end 3 has an external thread. By tightening the tension nut 41, its position on the second piston rod end 3 can be steplessly adjusted. After the cable 7 is tensioned, the tension nut 41 can be tightened until it abuts against the second end of the cylinder 1. The reaction force of the cable 7 on the first piston rod end 2 is transmitted to the tension nut 41 through the thread. The tension nut 41 acts on the second end of the cylinder 1, and then the cylinder 1 transmits the force to the fixed base 6, thus fixing the cable 7.

[0037] Of course, this application is not limited to this. The second piston rod section can also be set as a locking hole end, that is, the second piston rod end 3 is provided with multiple locking holes for the pin shaft to pass through. The piston rod locking assembly 4 can be set as a pin shaft. After the cable 7 is tensioned, the pin shaft can be passed into the corresponding locking hole so that the pin shaft abuts against the second end of the cylinder 1. The reaction force of the cable 7 on the first piston rod end 2 is applied to the cylinder 1 through the pin shaft. The cylinder 1 then transmits the force to the fixed base 6 to achieve the fixation of the cable 7.

[0038] like Figure 1 As shown in this embodiment, the piston rod locking assembly 4 further includes a spacer 42, which is fitted between the cylinder 1 and the tension nut 41. The tension nut 41 is used to abut the spacer 42 against the end face of the cylinder 1. The spacer 42 reduces the length of the external thread section on the second piston rod end 3. It is understood that without the spacer 42, the external thread section needs to extend to the second end of the cylinder 1, while with the spacer 42, the external thread section only needs to extend to the position of the spacer 42. This reduces the processing difficulty and cost of the second piston rod end 3. Furthermore, the presence of the spacer 42 increases the contact area between the tension nut 41 and the cylinder 1, making the force transmission more uniform and effectively preventing deformation or damage to the end face of the cylinder 1 due to excessive local force. In addition, the spacer 42 also provides a certain buffering effect. When the cable 7 vibrates or is impacted during operation, the spacer 42 absorbs some energy, further protecting the cylinder 1 and the tension nut 41 and extending the service life of the entire tensioning device.

[0039] Furthermore, to facilitate the installation and removal of the spacer 42, an anti-slip texture or a handle structure can be provided on the outer surface of the spacer 42 to improve the convenience and efficiency of operation.

[0040] like Figure 2 As shown in this embodiment, the spacer 42 is sleeve-shaped and includes stop portions 422 at both ends and a central cylindrical section 421. The outer diameter of the stop portions 422 is larger than the outer diameter of the cylindrical section 421. The design of the stop portions 422 effectively restricts the axial movement of the spacer 42 within the cylinder 1, ensuring its stability during operation. The larger outer diameter of the stop portions 422 results in a larger contact area with the inner wall of the cylinder 1, further enhancing the uniformity of force transmission. When the tension nut 41 is tightened, the stop portions 422 can better distribute pressure, preventing wear or deformation of the inner wall of the cylinder 1 due to localized pressure concentration.

[0041] In this embodiment, multiple spacers 42 are used. It is understood that in actual use, the length of the cable 7 and the installation position of the cylinder 1 will cause differences in the piston rod stroke. By setting multiple spacers 42, they can be flexibly combined according to specific needs to adapt to different piston rod stroke requirements. Using different numbers of spacers 42 allows for precise adjustment of the overall length of the tensioning device, thereby meeting the tensioning requirements of the cable 7 under different working conditions. For example, when the cable 7 is long and requires a larger tension stroke, the number of spacers 42 can be increased; conversely, when the cable 7 is short and requires a smaller tension stroke, the number of spacers 42 can be appropriately reduced. Furthermore, the multiple spacers 42 also facilitate maintenance and replacement. If one of the spacers 42 is worn or damaged, only that spacer 42 needs to be replaced individually, without requiring large-scale disassembly and replacement of the entire tensioning device, reducing maintenance and time costs.

[0042] like Figure 1 and Figure 2 As shown in this embodiment, the piston rod locking assembly 4 further includes an anti-loosening nut 43, which is threadedly connected to the second piston rod end 3 and located on the side of the tensioning nut 41 facing away from the cylinder 1. The anti-loosening nut 43 further enhances the stability of the tensioning device. It is understood that during equipment operation, the tensioning nut 41 may loosen due to factors such as vibration, leading to changes in tension force and affecting the normal operation of the tensioning cylinder. The anti-loosening nut 43 can effectively resist the loosening tendency caused by vibration, prevent the tensioning nut 41 from moving, keep the tensioning nut 41 in a tightened state, and maintain a stable tension force on the cable 7.

[0043] like Figure 3 As shown in this embodiment, the tensioning cylinder further includes a rotary drive mechanism 5 mounted on the cylinder barrel 1. The rotary drive mechanism 5 drives the tensioning nut 41 to move helically along the end 3 of the second piston rod. The rotary drive mechanism 5 further improves the ease of use of the tensioning cylinder. The rotary drive mechanism 5 can quickly and accurately adjust the position of the tensioning nut 41 through an automated driving method. Compared with manual adjustment, this not only improves work efficiency but also allows for precise adjustment of the preload of the tensioning nut 41.

[0044] Specifically, the rotary drive mechanism 5 includes a first motor 51 and a first drive gear 53 mounted on the output shaft of the first motor 51. A tension gear portion 411 is correspondingly provided on the outer peripheral wall of the tension nut 41. The first drive gear 53 meshes with the tension gear portion 411. The first motor 51 drives the first drive gear 53 to rotate, thereby driving the meshing tension gear portion 411 to rotate, realizing the helical movement of the tension nut 41 along the end of the second piston rod 3. Furthermore, the first motor 51 is mounted on a hydraulic cylinder and tilts and swings synchronously with the hydraulic cylinder.

[0045] Of course, this application is not limited to this. The second piston rod end 3 can also be set as a rotatable lead screw, and a slide rail parallel to the second piston rod end 3 can be set on the oil cylinder. The inner wall of the tension nut 41 is threadedly connected to the second piston rod end 3, and the outer wall of the tension nut 41 is slidably connected to the slide rail. That is, the tension nut 41 and the second piston rod end 3 form a ball screw pair, and the rotary drive mechanism 5 is set as a motor to drive the second piston rod end 3 to rotate.

[0046] Furthermore, the rotary drive mechanism 5 also includes a second motor 52 and a second drive gear 54 disposed on the output shaft of the second motor 52. A corresponding anti-loosening gear portion 431 is disposed on the outer peripheral wall of the anti-loosening nut 43. The second drive gear 54 meshes with the anti-loosening gear portion 431. The second motor 52 drives the second drive gear 54 to rotate, thereby driving the meshing anti-loosening gear portion 431 to rotate, realizing the helical movement of the anti-loosening nut 43 along the end 3 of the second piston rod. Even further, the second motor 52 is mounted on the hydraulic cylinder and tilts and swings synchronously with the cylinder 1.

[0047] like Figure 1 As shown in this embodiment, the first end of the cylinder 1 is provided with a first cylinder port 11, and the second end of the cylinder 1 is provided with a second cylinder port 12. A first pressure sensor is provided at the first cylinder port 11, and a second pressure sensor is provided at the second cylinder port 12. During tensioning, the first and second pressure sensors monitor the pressure at the two cylinder ports in real time. The product of the pressure difference between the two cylinder ports and the effective working area of ​​the piston rod is the actual tension force, thereby achieving precise control of the tension force through the hydraulic control system.

[0048] like Figure 2 As shown in this embodiment, the first piston rod end 2 is provided with a plurality of parallel and spaced cable connection grooves 21 and cable connection pin holes 22 passing through the plurality of cable connection grooves 21. The cable 7 connection pin can pass through the cable connection pin hole 22 to firmly fix the cable 7 in the cable connection groove 21, ensuring the stability of the connection between the cable 7 and the tensioning cylinder and preventing the cable 7 from falling off or shifting during the tensioning process.

[0049] like Figure 4 As shown, to achieve the above objectives, a second aspect of this application provides a tensioning device, including a fixed base 6 and the aforementioned tensioning cylinder, with the cylinder barrel 1 hinged to the fixed base 6. Since the tensioning device employs all the technical solutions of the above embodiments, it possesses at least the aforementioned beneficial effects, which will not be elaborated upon here.

[0050] like Figure 4As shown, to achieve the above objectives, a third aspect of this application provides a cable tensioning system, comprising multiple cables 7, wherein the multiple cables 7 are connected one-to-one to multiple sets of the aforementioned tensioning devices. Since the cable tensioning system employs all the technical solutions of the above embodiments, it possesses at least the aforementioned beneficial effects, which will not be elaborated upon here.

[0051] Specifically, the cable 7 is composed of several male and female tension plates 71 that are alternately hinged together by pins, see [link to relevant documentation]. Figure 6 The mother pull plate 71 includes three pull plate bodies 711 arranged in parallel and spaced apart. Each pull plate body 711 has a pull plate connecting pin hole 714 for a pin shaft to pass through. A sleeve 713 is provided between adjacent pull plate bodies 711. The mother pull plate 71 also includes a connecting bolt 712, which passes through the pull plate body 711 and the sleeve 713 in sequence, thereby connecting multiple pull plate bodies 711 in series.

[0052] Furthermore, the first piston rod end 2 is provided with three parallel and spaced cable connection grooves 21. The three pull plate bodies 711 of the female pull plate 71 located at the end of the cable 7 are embedded in the three cable connection grooves 21 in a one-to-one correspondence. The cable connection pin passes through the cable connection pin hole 22 so that the female pull plate 71 and the first piston rod end 2 are rotatably connected.

[0053] In the description of this application, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0054] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between components; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0055] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0056] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A tensioning cylinder, characterized in that, The tensioning cylinder includes: Cylinder (1); The piston assembly includes a first piston rod end (2) extending from a first end of the cylinder (1) and a second piston rod end (3) extending from a second end of the cylinder (1), wherein the first piston rod end (2) is a cable (7) connection end; A piston rod locking assembly (4) is disposed at the second end of the cylinder (1) and is used to limit and lock the second piston rod end (3).

2. The tensioning cylinder according to claim 1, characterized in that, The second piston rod end (3) is a threaded connection end. The piston rod locking assembly (4) includes a tension nut (41), which is threadedly connected to the second piston rod end (3) and presses against the end face of the cylinder (1).

3. The tensioning cylinder according to claim 2, characterized in that, The piston rod locking assembly (4) further includes a spacer (42), which is fitted between the cylinder (1) and the tension nut (41), and the tension nut (41) is used to abut the spacer (42) against the end face of the cylinder (1).

4. The tensioning cylinder according to claim 3, characterized in that, The spacer (42) is sleeve-shaped and includes stop portions (422) at both ends and a central cylindrical section (421), wherein the outer diameter of the stop portions (422) is larger than the outer diameter of the cylindrical section (421); and / or, the number of spacers (42) is multiple.

5. The tensioning cylinder according to claim 2, characterized in that, The piston rod locking assembly (4) also includes a locking nut (43), which is threaded to the second piston rod end (3) and is located on the side of the tension nut (41) facing away from the cylinder (1).

6. The tensioning cylinder according to claim 2, characterized in that, The tensioning cylinder also includes a rotary drive mechanism (5) disposed on the cylinder (1), the rotary drive mechanism (5) being used to drive the tensioning nut (41) to move helically along the end of the second piston rod (3).

7. The tensioning cylinder according to any one of claims 1-6, characterized in that, The first end of the cylinder (1) is provided with a first cylinder oil port (11), and the second end of the cylinder (1) is provided with a second cylinder oil port (12). A first pressure sensor is provided at the first cylinder oil port (11), and a second pressure sensor is provided at the second cylinder oil port (12).

8. The tensioning cylinder according to any one of claims 1-6, characterized in that, The first piston rod end (2) is provided with a plurality of cable connection grooves (21) arranged in parallel intervals and cable connection pin holes (22) passing through the plurality of cable connection grooves (21).

9. A tensioning device, characterized in that, The tensioning device includes a fixed base (6) and a tensioning cylinder according to any one of claims 1-8, wherein the cylinder barrel (1) is hinged to the fixed base (6).

10. A cable tensioning system comprising multiple cables (7), characterized in that, The cable (7) tensioning system also includes multiple sets of tensioning devices according to claim 9, which are connected one-to-one with the multiple cables (7).

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