Coupling hoisting tool

Abstract

The application relates to a shaft coupling hoisting tool for assisting in hoisting a shaft coupling, the shaft coupling hoisting tool comprising a hoisting cylinder and a roller mechanism, the hoisting cylinder being provided with a containing cavity for containing the shaft coupling, and the hoisting cylinder being provided with openings in communication with the containing cavity on both sides along the axial direction of the hoisting cylinder, the roller mechanism being connected to the cylinder wall of the hoisting cylinder, the roller mechanism comprising at least one roller located in the containing cavity and used for rolling contact with the shaft coupling, the axial direction of the roller being parallel to the axial direction of the hoisting cylinder, so that the shaft coupling can rotate with the roller. In the shaft coupling hoisting tool, the shaft coupling partially arranged in the containing cavity of the hoisting cylinder can rotate with the roller, so that the installation hole of the shaft coupling is conveniently rotated and aligned, thereby facilitating the reinstallation of the shaft coupling after the maintenance is completed.

Description

Technical Field

[0001] This application relates to the field of hoisting equipment technology, and in particular to a coupling hoisting tool. Background Technology

[0002] A coupling is a mechanical component used to securely connect the driving shaft and driven shaft in different mechanisms so that they rotate together and transmit motion and torque. In nuclear power plants, couplings are used to connect the feedwater pump booster pump to the motor, the motor to the coupler, and the coupler to the pressure pump.

[0003] A typical water pump coupling consists of a middle section and two backing wheels. The backing wheels on both sides need to be installed on different equipment and rotate with the shaft. The middle section connects the two backing wheels, serving to transmit torque. During maintenance, it is often necessary to disassemble the middle section to repair the equipment on both sides. At this time, the position of the backing wheels will change. When reinstalling after maintenance, it is difficult to rotate and align the mounting holes of the middle section and the backing wheels. Summary of the Invention

[0004] Therefore, it is necessary to provide a coupling hoisting tool to address the problem that the intermediate short section of the coupling is difficult to rotate and align with the mounting hole of the backing wheel when reinstalling after maintenance.

[0005] This application provides a coupling lifting tool for assisting in the lifting of couplings, comprising: a lifting cylinder having a receiving cavity for accommodating the coupling, and the lifting cylinder having openings communicating with the receiving cavity on both sides along its axial direction; and a roller mechanism connected to the cylinder wall of the lifting cylinder, the roller mechanism including at least one roller located in the receiving cavity and for rolling contact with the coupling, the axial direction of the roller being parallel to the axial direction of the lifting cylinder, so that the coupling can rotate with the roller.

[0006] In one embodiment, the roller mechanism further includes an outer mounting base, an inner mounting base, and a first fastener. The outer mounting base is disposed on the outer wall of the lifting cylinder. One end of the inner mounting base passes through the cylinder wall of the lifting cylinder via the first fastener and is detachably connected to the outer mounting base. The other end of the inner mounting base is connected to the roller.

[0007] In one embodiment, the outer mounting base and the inner mounting base are slidable relative to each other along the axis of the first fastener; the roller mechanism further includes an elastic element sleeved on the first fastener, with its two ends connected to the outer mounting base and the inner mounting base respectively along the elastic deformation direction of the elastic element, and the elastic element is configured to provide an elastic force that causes the inner mounting base to have a tendency to move away from the outer mounting base.

[0008] In one embodiment, the outer mounting base includes a first connecting plate and a plurality of first side plates. The first connecting plate and the lifting cylinder are spaced apart from each other. One end of the first side plate is connected to the first connecting plate, and the other end of the first side plate abuts against the lifting cylinder. A sliding space is formed between the first side plates. The inner mounting base includes a second connecting plate and a plurality of second side plates. The second connecting plate is disposed in the sliding space and slides against the first side plates. One end of the second side plate is connected to the second connecting plate, and the other end of the second side plate is connected to a roller. A first fastener is sequentially inserted through the first connecting plate and the second connecting plate, and an elastic element is compressed between the first connecting plate and the second connecting plate.

[0009] In one embodiment, the outer mounting base and the inner mounting base are slidable relative to each other along the axis of the first fastener, which is capable of securing the inner mounting base at different positions on the outer mounting base.

[0010] In one embodiment, there are multiple roller mechanisms, and each roller mechanism is arranged in a group to form multiple roller mechanism groups. The multiple roller mechanisms in each roller mechanism group are arranged at intervals around the circumference of the wall of the lifting cylinder.

[0011] In one embodiment, there are multiple roller mechanisms, which are spaced apart and evenly arranged along the axial direction of the lifting cylinder.

[0012] In one embodiment, the lifting cylinder includes an upper cylinder, a lower cylinder, and a second fastener; the upper cylinder includes a first main body and a first connecting portion extending from one end of the first main body in a direction away from its center; the lower cylinder includes a second main body and a second connecting portion extending from one end of the second main body in a direction away from its center, the second connecting portion and the first connecting portion being opposite to each other and parallel to each other; the second fastener is sequentially inserted into the first connecting portion and the second connecting portion; the first main body and the second main body form a receiving cavity.

[0013] In one embodiment, the coupling lifting tool further includes multiple lifting rings, each ring being connected to two first connecting parts and / or two second connecting parts.

[0014] In one embodiment, the coupling hoisting tool further includes a support member located on the side of the second main body opposite to the first main body.

[0015] The aforementioned coupling hoisting tool, by setting rollers in the roller mechanism for connection with the coupling, and making the axial direction of the rollers parallel to the axial direction of the hoisting cylinder, allows the coupling partially set in the receiving cavity of the hoisting cylinder to rotate with the rollers, which facilitates the rotation and alignment of the mounting holes of the coupling, thereby making it convenient to reinstall the coupling after maintenance. Attached Figure Description

[0016] Figure 1This is a schematic diagram of the overall structure of a coupling hoisting tool provided in one embodiment of this application.

[0017] Figure 2 for Figure 1 Sectional view along direction AA.

[0018] Figure 3 This is a schematic diagram of the coupling hoisting tool and its engagement structure in use, according to one embodiment of this application.

[0019] Figure 4 This is a schematic diagram of the overall structure of the roller mechanism in a coupling lifting tool provided in one embodiment of this application.

[0020] Figure 5 This is an exploded structural diagram of the lifting cylinder in a coupling lifting tool provided in one embodiment of this application.

[0021] Figure 6 for Figure 1 BB-direction sectional view.

[0022] The reference numerals in the detailed embodiments are as follows:

[0023] 10: Coupling hoisting tools;

[0024] 100: Lifting cylinder, 110: Upper cylinder, 111: First main body, 112: First connecting part, 113: First axis of symmetry, 120: Lower cylinder, 121: Second main body, 122: Second connecting part, 123: Second axis of symmetry, 130: Second fastener, 140: Receiving cavity, 150: Opening;

[0025] 200: Roller mechanism, 210: Roller, 220: Outer mounting base, 221: First connecting plate, 222: First side plate, 230: Inner mounting base, 231: Second connecting plate, 232: Second side plate, 240: First fastener, 250: Elastic element;

[0026] 300: Rings;

[0027] 400: Support component;

[0028] 20: Coupling; 21: Short section. Detailed Implementation

[0029] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0030] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0031] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0032] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," 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 or an electrical connection; 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.

[0033] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0034] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0035] Figure 1 This paper shows a schematic diagram of the overall structure of a coupling hoisting tool 10 according to an embodiment of this application. Figure 2 It shows Figure 1 Sectional view along line AA in the middle, Figure 3 This illustration shows a schematic diagram of the coupling hoisting tool 10 provided in one embodiment of the present application and its cooperation structure with the coupling 20.

[0036] Please see Figures 1 to 3 This application provides a coupling lifting tool 10 for assisting in the lifting of a coupling 20. The coupling lifting tool 10 includes a lifting cylinder 100 and a roller mechanism 200. The lifting cylinder 100 has a receiving cavity 140 for accommodating the coupling 20, and the lifting cylinder 100 has openings 150 communicating with the receiving cavity 140 on both sides along its axial direction. The roller mechanism 200 is connected to the cylinder wall of the lifting cylinder 100 and includes at least one roller 210 located in the receiving cavity 140 and for rolling contact with the coupling 20. The axial direction of the roller 210 is parallel to the axial direction of the lifting cylinder 100 so that the coupling 20 can rotate with the roller 210.

[0037] The coupling lifting tool 10 in this embodiment is used to assist in lifting the coupling 20, such as... Figure 3As shown, the coupling 20 includes a short section 21 and backing wheels (not shown) that can be detachably connected to both ends of the short section 21. In use, the short section 21 is partially housed within the receiving cavity 140 of the lifting cylinder 100, with the axial direction of the short section 21 parallel to the axial direction of the lifting cylinder 100. Therefore, the shape and size of the receiving cavity 140 within the lifting cylinder 100 can be customized according to the shape and size of the short section 21 to be accommodated, and are not limited here. Openings 150 on both axial sides of the lifting cylinder 100 communicate with the receiving cavity 140, allowing both ends of the short section 21 to extend from the openings 150 and connect to the backing wheels mounted on external equipment. The cross-sectional shape and dimensions of the openings 150 can be consistent with or different from the cross-sectional shape and dimensions of the receiving cavity 140, depending on the application requirements.

[0038] like Figures 1 to 2 As shown, the number of roller mechanisms 200 in the coupling lifting tool 10 of this application embodiment can be one or more. Each roller mechanism 200 includes one or more rollers 210. This ensures that at least one side of the short section 21 of the coupling 20, i.e., the lower side of the short section 21 in the direction of gravity, is not directly connected to the inner wall of the lifting cylinder 100, but rather abuts against the roller 210 protruding to the center of the receiving cavity 140. This allows the short section 21 of the coupling 20 to move relative to the lifting cylinder 100 along with the roller 210. Furthermore, since the axial direction of the roller 210 is parallel to the axial direction of the lifting cylinder 100, the short section 21 of the coupling 20 can rotate around the rotation axis of the roller 210, that is, around the central axis of the lifting cylinder 100, and also around the central axis of the short section 21 itself, as shown. Figure 2 The arrow in the middle points in the direction, thus achieving the effect of rotating the short section 21.

[0039] The coupling hoisting tool 10 of this application embodiment uses rollers 210 in the roller mechanism 200 for rolling contact with the coupling 20, and makes the axial direction of the rollers 210 parallel to the axial direction of the hoisting cylinder 100, so that the coupling 20 partially disposed in the receiving cavity 140 of the hoisting cylinder 100 can rotate with the rollers 210, which facilitates the rotational alignment of the mounting holes of the coupling 20, thereby facilitating the reinstallation of the coupling 20 after maintenance.

[0040] Figure 4 This paper shows a schematic diagram of the overall structure of the roller mechanism 200 in the coupling lifting tool 10 provided in one embodiment of the present application.

[0041] The roller mechanism 200 is connected to the wall of the lifting cylinder 100. Please refer to... Figure 1 and Figure 2 And see Figure 4In some embodiments, the roller mechanism 200 may optionally include an outer mounting base 220, an inner mounting base 230, and a first fastener 240. The outer mounting base 220 is disposed on the outer wall of the lifting cylinder 100. One end of the inner mounting base 230 passes through the cylinder wall of the lifting cylinder 100 through the first fastener 240 and is detachably connected to the outer mounting base 220. The other end of the inner mounting base 230 passes through the lifting cylinder 100 and is connected to the roller 210 for rolling contact with the coupling 20 inside the lifting cylinder 100.

[0042] Since the roller mechanism 200 is detachably connected to the lifting cylinder 100, in some embodiments, multiple mounting holes of different depths can be provided on the lifting cylinder 100. By mounting the roller mechanism 200 in different mounting holes, the mounting depth of the roller mechanism 200 can be changed, thereby facilitating the adjustment of the circumferential and axial positions of the roller mechanism 200 in the lifting cylinder 100. Simultaneously, it also facilitates changing the specific position of the roller 210 within the receiving cavity 140 by adjusting the relative position between the inner mounting seat 230 and the outer mounting seat 220, thereby adjusting the relative positional relationship between the roller 210 and the short section 21 of the coupling 20 to meet the usage requirements under different conditions. In other embodiments, the outer wall of the lifting cylinder 100 can be set as a mesh-like porous structure. This not only reduces the weight of the lifting cylinder 100 for easier lifting but also allows observation of the coupling 20 inside the lifting cylinder 100 through these mounting holes.

[0043] In the embodiments of this application, the first fastener 240 can simultaneously serve as a connection and fastener between the outer mounting base 220 and the inner mounting base 230. The first fastener 240 can be a bolt or other components with similar functions. The outer mounting base 220 and the inner mounting base 230 can be provided with threads that match the bolt.

[0044] like Figure 4 As shown, in order to further facilitate the adjustment of the specific position of the roller 210 within the receiving cavity 140, in some embodiments, optionally, the outer mounting base 220 and the inner mounting base 230 can slide relative to each other along the axis of the first fastener 240. The roller mechanism 200 also includes an elastic member 250 sleeved on the first fastener 240. Along the elastic deformation direction of the elastic member 250, the two ends of the elastic member 250 abut against the first connecting plate 221 of the outer mounting base 220 and the second connecting plate 231 of the inner mounting base 230, respectively. The elastic member 250 is configured to provide a spring force that causes the inner mounting base 230 to have a tendency to move away from the outer mounting base 220.

[0045] The elastic element 250 can be a spring. Due to the presence of the elastic element 250, both the outer mounting base 220 and the inner mounting base 230 are subjected to the spring force, causing the inner mounting base 230 to tend to move away from the outer mounting base 220. After the coupling 20 is installed in the receiving cavity 140, the coupling 20 contacts the inner mounting base 230 through the roller 210. The coupling 20 presses the roller 210 toward the wall of the lifting cylinder 100, causing the inner mounting base 230 to move toward the outer mounting base 220. At this time, the elastic element 250 acts as a buffer between the outer mounting base 220 and the inner mounting base 230, realizing the adjustment of the specific position of the roller 210 in the receiving cavity 140. Depending on the size of the coupling 20, the amplitude of the inner mounting base 230 moving toward the outer mounting base 220 also varies. Furthermore, since the two ends of the elastic element 250 abut against the outer mounting base 220 and the inner mounting base 230 respectively along the elastic deformation direction of the elastic element 250, the elastic element 250 can play a certain buffering role between the outer mounting base 220 and the inner mounting base 230, preventing the sudden movement of the coupling 20 during use from causing a large impact on the inner wall of the lifting cylinder 100, thus ensuring safe use.

[0046] Please continue reading. Figure 4 In some embodiments, the outer mounting base 220 may include a first connecting plate 221 and two first side plates 222. The first connecting plate 221 and the lifting cylinder 100 are spaced apart from each other. One end of the first side plate 222 is connected to the first connecting plate 221, and the other end of the first side plate 222 abuts against the lifting cylinder 100, forming a sliding space between the first side plates 222. Meanwhile, the inner mounting base 230 may include a second connecting plate 231 and two second side plates 232. The second connecting plate 231 is located in the sliding space and slides against the first side plate 222. One end of the second side plate 232 is connected to the second connecting plate 231, and the other end of the second side plate 232 is connected to a roller 210. In this case, the first fastener 240 passes sequentially through the first connecting plate 221 and the second connecting plate 231, and the elastic element 250 is compressed between the first connecting plate 221 and the second connecting plate 231.

[0047] There is a sliding space between the first connecting plate 221 of the outer mounting base 220 and the first side plate 222 connected to the first connecting plate 221. The second connecting plate 231 of the inner mounting base 230 is disposed in the sliding space and slides against the first side plate 222. The first fastener 240 is sequentially inserted through the first connecting plate 221 and the second connecting plate 231. The elastic member 250 is compressed between the first connecting plate 221 and the second connecting plate 231, so that the inner mounting base 230 can be pushed by the elastic member 250 to slide along the axis of the first fastener 240 under the guiding action of the first fastener 240 and the limiting action of the first side plate 222, so as to adjust the relative position of the inner mounting base 230 and the roller 210 relative to the outer mounting base 220, and at the same time, adjust the specific position of the roller 210 in the receiving cavity 140.

[0048] In other embodiments, since one end of the inner mounting base 230 is detachably connected to the outer mounting base 220 after passing through the cylinder wall of the lifting cylinder 100 via the first fastener 240, the outer mounting base 220 and the inner mounting base 230 can slide relative to each other along the axis of the first fastener 240. During this relative sliding process, the relative position between the outer mounting base 220 and the first fastener 240 remains unchanged, that is, the outer mounting base 220 is relatively fixed, while the inner mounting base 230 slides relative to the first fastener 240. In other words, the first fastener 240 can fix the inner mounting base 230 at different positions of the outer mounting base 220.

[0049] Based on the above embodiment, the hoisting cylinder 100 has a clearance hole on its cylinder wall, and the second side plate 232 passes through the clearance hole, so that the inner mounting seat 230 can be partially passed through the cylinder wall of the hoisting cylinder 100. The part of the second side plate 232 outside the receiving cavity 140 inside the hoisting cylinder 100 can be connected to the second connecting plate 231, and the part of the second side plate inside the receiving cavity 140 inside the hoisting cylinder 100 can be connected to the roller 210.

[0050] As described above, the number of roller mechanisms 200 can be one or more. In some embodiments, optionally, the number of roller mechanisms 200 is multiple, and each roller mechanism 200 is grouped to form multiple roller mechanism groups. The multiple roller mechanisms 200 in each roller mechanism group are arranged at intervals around the circumference of the wall of the lifting cylinder 100. Figure 2 As shown, in one embodiment of this application, a roller mechanism group includes four roller mechanisms 200 arranged circumferentially around the wall of the lifting cylinder 100 at intervals from each other. These four roller mechanisms 200 support the short section 21 of the coupling 20 at different positions in the circumferential direction of the lifting cylinder 100, so that the short section 21 can rotate smoothly around the axial direction of the lifting cylinder 100.

[0051] Based on the above embodiments, each roller mechanism group further includes n roller mechanisms 200, where n is an even number greater than 0. In the roller mechanism group, the included angle α between any two adjacent roller mechanisms 200 is 360° / n. That is, the n roller mechanisms 200 in each roller mechanism group are evenly arranged around the circumference of the wall of the lifting cylinder 100. Figure 2 In the illustrated embodiment, n=4, then α=360° / 4=90°. In other embodiments, n=2, then α=360° / 2=180°, or n=6, then α=360° / 6=60°, and so on. Further details will not be provided here.

[0052] To further improve the smoothness of the rotation of the short section 21 around the axial direction of the lifting cylinder 100, in some embodiments, optionally, there are multiple roller mechanisms 200, which are spaced apart and evenly arranged along the axial direction of the lifting cylinder 100. For example... Figure 1 As shown, in one embodiment of this application, there are two roller mechanisms 200, which are spaced apart and evenly arranged along the axial direction of the lifting cylinder 100. In other embodiments, as the axial dimension of the lifting cylinder 100 increases, the coupling lifting tool 10 may include more roller mechanisms 200 to support the short section 21 of the coupling 20 at different positions along the axial direction of the lifting cylinder 100, facilitating smoother rotation of the short section 21 around the central axis of the lifting cylinder 100. In other optional embodiments, multiple roller mechanisms 20 can be replaced by one along the axial direction of the lifting cylinder 100, which has a certain length in the axial direction to stably support the short section 21.

[0053] Figure 5 An exploded view of the lifting cylinder 100 in a coupling lifting tool 10 provided in one embodiment of this application is shown.

[0054] To facilitate the insertion of the short section 21 of the coupling 20 into the receiving cavity 140 of the hoisting cylinder 100, please combine Figure 1 and Figure 2 And see Figure 5In some embodiments, optionally, the lifting cylinder 100 includes an upper cylinder 110, a lower cylinder 120, and a second fastener 130; the upper cylinder 110 includes a first main body 111 in a semi-cylindrical shape and a first connecting portion 112 extending radially away from the center from one end of the first main body 111; the lower cylinder 120 includes a second main body 121 in a semi-cylindrical shape and a second connecting portion 122 extending radially away from the center from one end of the second main body 121, the second connecting portion 122 and the first connecting portion 112 being opposite to each other and parallel to each other; the second fastener 130 is sequentially inserted through the first connecting portion 112 and the second connecting portion 122; the first main body 111 and the second main body 121 enclose a receiving cavity 140. Therefore, before hoisting, the upper cylinder 110 and lower cylinder 120 of the hoisting cylinder 100 can be separated. After hoisting the short section 21 of the coupling 20 into the lower cylinder 120 from above the opening 150 of the second main body 121, the upper cylinder 110 is then hoisted to the position covering the short section 21, and the upper cylinder 110 and lower cylinder 120 are connected through the first connecting part 112 and the second connecting part 122. After hoisting is completed, the short section 21 of the coupling 20 can be removed in the reverse order; this process will not be described in detail here.

[0055] Figure 6 It shows Figure 1 BB-direction sectional view.

[0056] To ensure better balance between the lifting cylinder 100 and the short section 21 of the coupling 20 during the hoisting process, and to allow the short section 21 to rotate smoothly around the axial direction of the lifting cylinder 100, please refer to the following: Figures 5 to 6In some embodiments, optionally, in a plane perpendicular to the axial direction of the hoisting cylinder 100, the first main body 111 has a first axis of symmetry 113, and the second main body 121 has a second axis of symmetry 123, with the first axis of symmetry 113 and the second axis of symmetry 123 coinciding with each other; the number of first connecting parts 112 is two, and the two first connecting parts 112 are symmetrically arranged about the first axis of symmetry 113 at opposite ends of the first main body 111; the number of second connecting parts 122 is two, and the two second connecting parts 122 are symmetrically arranged about the second axis of symmetry 123 at opposite ends of the second main body 121. Since the first axis of symmetry 113 of the first main body 111 coincides with the second axis of symmetry 123 of the second main body 121, the hoisting cylinder 100 as a whole has an axis of symmetry that coincides with the first axis of symmetry 113 and the second axis of symmetry 123. The two first connecting parts 112 are symmetrically arranged about the first axis of symmetry 113, and the two second connecting parts 122 are symmetrically arranged about the second axis of symmetry 123. The force between the upper cylinder 110 and the lower cylinder 120 is more balanced, which makes it easier for the hoisting cylinder 100 and the short section 21 of the coupling 20 to maintain better balance.

[0057] Based on the above embodiments, optionally, the coupling lifting tool 10 further includes a plurality of lifting rings 300, each lifting ring 300 being connected to two first connecting portions 112 and / or two second connecting portions 122 respectively. Since in the previous embodiment, the two first connecting portions 112 are symmetrically arranged about a first axis of symmetry 113, and the two second connecting portions 122 are symmetrically arranged about a second axis of symmetry 123, connecting the lifting rings 300 to the two first connecting portions 112 and / or the two second connecting portions 122 respectively, when the lifting cylinder 100 is lifted using the lifting rings 300, the lifting cylinder 100 and the short section 21 of the coupling 20 can still maintain better balance, so that the short section 21 can rotate smoothly around the axial direction of the lifting cylinder 100.

[0058] like Figure 1 and Figure 2 As shown, in some embodiments, the coupling lifting tool 10 may optionally include a support member 400, which is disposed on the side of the second main body 121 opposite to the first main body 111. The support member 400 facilitates the placement and balancing of the lifting cylinder 100.

[0059] In summary, the coupling 20 partially disposed within the receiving cavity 140 of the lifting cylinder 100 in the coupling lifting tool 10 of this application can rotate with the roller 210, which facilitates the rotational alignment of the mounting holes of the coupling 20, thereby making it convenient to reinstall the coupling 20 after maintenance.

[0060] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0061] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A coupling lifting tool for assisting in the lifting of couplings, characterized in that, include: A lifting cylinder having a receiving cavity for accommodating the coupling, and the lifting cylinder having openings communicating with the receiving cavity on both sides along its axial direction; and A roller mechanism is connected to the wall of the hoisting cylinder. The roller mechanism includes at least one roller located within the receiving cavity and for rolling contact with the coupling. The axial direction of the roller is parallel to the axial direction of the hoisting cylinder, so that the coupling can rotate with the roller. The roller mechanism further includes an outer mounting base, an inner mounting base, and a first fastener. The outer mounting base is disposed on the outer wall of the hoisting cylinder. One end of the inner mounting base is detachably connected to the outer mounting base after passing through the cylinder wall of the hoisting cylinder via the first fastener. The other end of the inner mounting base is connected to the roller. The outer mounting base and the inner mounting base are capable of sliding relative to each other along the axis of the first fastener; The roller mechanism further includes an elastic element sleeved on the first fastener. Along the elastic deformation direction of the elastic element, both ends of the elastic element are respectively connected to the outer mounting base and the inner mounting base. The elastic element is configured to provide an elastic force that causes the inner mounting base to have a tendency to move away from the outer mounting base. The external mounting base includes a first connecting plate and a plurality of first side plates. The first connecting plate and the hoisting cylinder are spaced apart from each other. One end of the first side plate is connected to the first connecting plate, and the other end of the first side plate abuts against the hoisting cylinder. A sliding space is formed between the first side plates. The inner mounting base includes a second connecting plate and a plurality of second side plates. The second connecting plate is disposed in the sliding space and slides against the first side plate. One end of the second side plate is connected to the second connecting plate, and the other end of the second side plate is connected to the roller. The first fastener is sequentially inserted through the first connecting plate and the second connecting plate, and the elastic element is compressed between the first connecting plate and the second connecting plate; The lifting cylinder includes an upper cylinder, a lower cylinder, and a second fastener; The upper cylinder includes a first main body and a first connecting part extending from one end of the first main body in a direction away from its center. The lower cylinder includes a second main body and a second connecting part extending from one end of the second main body in a direction away from its center. The second connecting part and the first connecting part are opposite to each other and are arranged parallel to each other. The second fastener is sequentially inserted into the first connecting portion and the second connecting portion; The first main body and the second main body enclose the receiving cavity.

2. The coupling hoisting tool according to claim 1, characterized in that, The outer mounting base and the inner mounting base are slidable relative to each other along the axis of the first fastener, and the first fastener is capable of fixing the inner mounting base at different positions on the outer mounting base.

3. The coupling hoisting tool according to claim 1, characterized in that, The number of roller mechanisms is multiple, and each roller mechanism is arranged in a group to form multiple roller mechanism groups. The multiple roller mechanisms in each roller mechanism group are arranged at intervals around the circumference of the wall of the hoisting cylinder.

4. The coupling hoisting tool according to claim 1, characterized in that, The number of roller mechanisms is multiple, and the multiple roller mechanisms are spaced apart from each other and evenly arranged along the axial direction of the hoisting cylinder.

5. The coupling hoisting tool according to claim 1, characterized in that, The coupling hoisting tool also includes multiple lifting rings, each of which is connected to two of the first connecting parts and / or two of the second connecting parts.

6. The coupling hoisting tool according to claim 1, characterized in that, The coupling hoisting tool also includes a support member, which is located on the side of the second main body away from the first main body.

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