Replacement device

Abstract

A replacement device (1), comprising: two frame bodies (10) arranged side by side, wherein each frame body (10) comprises an upright column (11), a first cantilever beam (12), and a second cantilever beam (13), the upright column (11) is arranged in the height direction (H) and is detachably connected to the top of a supporting structure used for mounting a device to be repaired, and the first cantilever beam (12) and the second cantilever beam (13) are both arranged in the length direction (L) and are respectively connected to two sides of the upright column (11) in the length direction (L); a transverse rail (20) arranged in the width direction (W), wherein two ends of the transverse rail (20) are respectively connected to two first cantilever beams (12); a first pulley assembly (30) slidably arranged on the transverse rail (20), wherein the first pulley assembly (30) is used for being connected to the device to be repaired; and second pulley assemblies (40) respectively having one end slidably arranged on the corresponding first cantilever beam (12) in the height direction (H), and the other end fixedly connected to the transverse rail (20). A counterweight matching the weight of the device to be repaired can be suspended on the second cantilever beam (13). By configuring the structures of the frame bodies (10) of the replacement device (1), the hoisting difficulty is reduced, and the replacement costs are saved.

Description

Replacement device

[0001] This application claims priority to Chinese patent application 2024223882142 with a filing date of 2024 / 9 / 27. This application incorporates the entirety of the aforementioned Chinese patent application. TECHNICAL FIELD

[0002] The present application relates to a replacement device. BACKGROUND

[0003] A wind turbine generator set generally includes a generator, a speed reducer, a transformer, a cooler, and other devices that work with the blade assembly.

[0004] When these supporting devices fail, the failed devices usually need to be transported out for repair. However, the failed devices to be repaired are very heavy and are usually located in the air. If the failed devices are to be transported out, large special hoisting equipment needs to be used to hoist the failed devices out for repair.

[0005] The use of large professional hoisting equipment not only has high hoisting difficulty, but also has high implementation cost. The failed device needs to be hoisted and maintained once, and a large-scale hoisting and maintenance work needs to be carried out once. This is not conducive to the hoisting and maintenance of the failed device. SUMMARY

[0006] The technical problem to be solved by the present application is the defect that the large professional hoisting equipment in the prior art has high hoisting difficulty and cost for hoisting the failed device. The present application provides a replacement device.

[0007] The present application solves the above technical problem by the following technical scheme:

[0008] A replacement device for replacing a failed device of a wind turbine generator set, characterized in that the replacement device comprises:

[0009] Two frame bodies arranged side by side, each frame body comprising a stand, a first cantilever beam, and a second cantilever beam, the stand being arranged along a height direction and being detachably connected to a top of a support structure for mounting the failed device, the first cantilever beam and the second cantilever beam being arranged along a length direction and being respectively connected to both sides of the stand along the length direction;

[0010] A cross rail arranged along a width direction, and both ends of the cross rail being respectively connected to the first cantilever beams of the two frame bodies;

[0011] A first trolley assembly arranged on the cross rail and used for connecting with the failed device;

[0012] A second trolley assembly is arranged on the first cantilever beam at one end thereof in the height direction and is fixedly connected to the cross rail at the other end thereof;

[0013] The second cantilever beam is capable of suspending a counterweight matching the weight of the equipment to be repaired.

[0014] In the technical solution, the frame structure of the replacement equipment is detachably connected to the top of the support structure for mounting the equipment to be repaired, thereby reducing the hoisting difficulty and saving the replacement cost as compared with the large professional hoisting equipment in the prior art. The second cantilever beam is capable of suspending a counterweight matching the weight of the equipment to be repaired, that is, the second cantilever beam is capable of suspending a counterweight equivalent to the weight of the equipment to be repaired.

[0015] Preferably, the first cantilever beam and the second cantilever beam are spaced apart from the top end of the stand column.

[0016] The frame further comprises a first pull rod, two ends of the first pull rod being respectively connected to the top end of the stand column and the end of the first cantilever beam away from the stand column; and / or,

[0017] The frame further comprises a second pull rod, two ends of the second pull rod being respectively connected to the top end of the stand column and the end of the second cantilever beam away from the stand column.

[0018] In the technical solution, the first pull rod is arranged to exert a pulling force on the end of the first cantilever beam away from the stand column, so that the first cantilever beam can remain stable after bearing the load. The second pull rod is arranged to exert a pulling force on the end of the second cantilever beam away from the stand column, so that the second cantilever beam can remain stable after bearing the load.

[0019] Preferably, the frame further comprises a first connecting assembly connecting the first pull rod and the first cantilever beam, the first connecting assembly comprising first connecting plates respectively clamped on both sides of the first cantilever beam in the width direction, and the first pull rod being connected to one end of the first connecting plate in the height direction through a first fixing assembly; and / or,

[0020] The frame further comprises a second connecting assembly connecting the second pull rod and the second cantilever beam, the second connecting assembly comprising second connecting plates respectively clamped on both sides of the second cantilever beam in the width direction, and the second pull rod being connected to one end of the second connecting plate in the height direction through a second fixing assembly.

[0021] Preferably, the frame further comprises a third connecting assembly connecting the first pull rod and the second pull rod.

[0022] The third connecting assembly comprises third connecting plates respectively arranged on both sides of the stand in the width direction, the third connecting plates are fixedly connected with the stand, and the first pull rod and the second pull rod are respectively connected to both ends of the third connecting plates along the length direction through third fixing assemblies.

[0023] Preferably, the frame further comprises a fourth connecting assembly, the fourth connecting assembly connects the first cantilever beam and the second cantilever beam.

[0024] The fourth connecting assembly comprises fourth connecting plates respectively arranged on both sides of the stand in the width direction, the fourth connecting plates are fixedly connected with the stand, and the first cantilever beam and the second cantilever beam are respectively connected to both ends of the fourth connecting plates along the length direction through fourth fixing assemblies.

[0025] Preferably, the frame further comprises a support leg, the support leg is arranged in the same direction as the stand, the top end of the support leg is connected with the stand, and the bottom end of the support leg is arranged in a spaced manner with the bottom end of the stand.

[0026] In the technical solution, the support leg can assist in supporting the stand.

[0027] Preferably, the replacement device further comprises a first transverse support, two ends of the first transverse support are respectively connected with the first cantilever beams of two frame bodies.

[0028] In the technical solution, the first transverse support can make the overall structure of the replacement device more stable.

[0029] Preferably, the replacement device further comprises a second transverse support, two ends of the second transverse support are respectively connected with the first cantilever beam of one of the frame bodies and the second cantilever beam of another of the frame bodies.

[0030] In the technical solution, the second transverse support can make the overall structure of the replacement device more stable.

[0031] Preferably, the cross rail is provided with a transverse sliding groove, and the first pulley block assembly is slidingly arranged in the transverse sliding groove.

[0032] The transverse sliding groove is provided with a first blocking piece at each end in the width direction, and the first blocking piece is used to block the first pulley block from being separated from the transverse sliding groove.

[0033] In the technical solution, the transverse sliding groove is arranged to accommodate the first pulley block, and the movement track of the first pulley block is limited. The first blocking piece is arranged to block the first pulley block from being separated from the transverse sliding groove.

[0034] Preferably, a longitudinal sliding groove is arranged on each of the first cantilever beams, and the second pulley sets of the two second trolley assemblies are respectively slidingly arranged in the longitudinal sliding grooves of the two first cantilever beams.

[0035] An end of each of the longitudinal sliding grooves away from the stand is provided with a second blocking piece for blocking the second pulley set from being separated from the longitudinal sliding groove.

[0036] In the technical solution, the longitudinal sliding groove is arranged to accommodate the second pulley set, and the movement track of the second pulley set is limited. The second blocking piece is arranged to block the second pulley set from being separated from the longitudinal sliding groove.

[0037] The positive progress effect of the present application is that:

[0038] The present application reduces the hoisting difficulty and saves the replacement cost by arranging the frame structure of the replacement device. BRIEF DESCRIPTION OF DRAWINGS

[0039] Fig. 1 is a front view structural schematic diagram of the replacement device according to a preferred embodiment of the present application.

[0040] Fig. 2 is a partial enlarged structural schematic diagram of part A in Fig. 1.

[0041] Fig. 3 is a partial enlarged structural schematic diagram of part B in Fig. 1.

[0042] Fig. 4 is a partial enlarged structural schematic diagram of part C in Fig. 1.

[0043] Fig. 5 is a partial enlarged structural schematic diagram of part D in Fig. 1.

[0044] Fig. 6 is a partial enlarged structural schematic diagram of part E in Fig. 1.

[0045] Fig. 7 is a right view structural schematic diagram of the replacement device according to a preferred embodiment of the present application.

[0046] Fig. 8 is a partial enlarged structural schematic diagram of part F in Fig. 7.

[0047] Fig. 9 is a top view structural schematic diagram of the replacement device according to a preferred embodiment of the present application.

[0048] Explanation of reference signs Replacement device 1 Frame 10 Column 11 First cantilever beam 12 Longitudinal sliding groove 121 Second cantilever beam 13 First pull rod 141 Second pull rod 142 First connecting assembly 15 First connecting plate 151 First fixing assembly 152 Second connecting assembly 16 Second connecting plate 161 Second fixing assembly 162 Third connecting assembly 17 Third connecting plate 171 Third fixing assembly 172 Fourth connecting assembly 18 Fourth connecting plate 181 Fourth fixing assembly 182 Leg 19 Cross rail 20 Crosswise sliding groove 21 First blocking piece 22 First trolley assembly 30 First pulley set 31 Second trolley assembly 40 Second pulley set 41 First transverse support 50 Second transverse support 60 Height direction H Length direction L Width direction W DETAILED DESCRIPTION

[0049] Embodiments of the present application are described in detail below with reference to the attached drawings, wherein the same or similar components have the same or similar designations throughout the several figures of the drawings and any description of the same or similar components can be used interchangeably. The embodiments described below are examples of embodiments of the present application, which are intended to explain the present application, and are not intended to limit the present application, and all other embodiments obtained by those skilled in the art based on the embodiments of the present application without creative effort fall within the scope of the present application.

[0050] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "circumferential", "radial" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are merely used for the purpose of facilitating the description of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0051] In addition, the terms "first", "second", "third", etc. are used only for the purpose of description and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined with "first", "second", etc. can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly specified.

[0052] As shown in FIGS. 1-9, the present embodiment provides a replacement device 1 for replacing a device to be repaired of a wind turbine generator. The replacement device 1 is detachably connected to a top of a support structure for mounting the device to be repaired, and the replacement device 1 comprises two frame bodies 10, a cross rail 20, a first trolley assembly 30 and a second trolley assembly 40.

[0053] The two frame bodies 10 are arranged side by side. Each frame body 10 comprises a stand 11 arranged along a height direction H and detachably connected to the top of the support structure for mounting the device to be repaired, a first cantilever beam 12 and a second cantilever beam 13 both arranged along a length direction L and connected to two sides of the stand 11 along the length direction L respectively. The cross rail 20 is arranged along a width direction W, and two ends of the cross rail 20 are connected to the first cantilever beams 12 of the two frame bodies 10 respectively. The first trolley assembly 30 is slidingly arranged on the cross rail 20 and used for connecting with the device to be repaired. One end of the second trolley assembly 40 along the height direction H is slidingly arranged on the first cantilever beam 12, and the other end is fixedly connected to the cross rail 20. The second cantilever beam 13 is capable of suspending a counterweight matching the weight of the device to be repaired.

[0054] In this way, by arranging the frame body structure of the replacement device 1, the hoisting difficulty is reduced and the replacement cost is saved compared with the large professional hoisting device in the prior art.

[0055] It should be noted that in the present embodiment, the device to be repaired is a cooler, and can also be a detachable local part of the cooler, such as a cooling fin. The cooler is mounted on a cooling tower, i.e., the cooling tower is the corresponding support structure. However, it is not limited thereto, and can also be other devices, such as a generator, a speed reducer, etc. mounted on the corresponding support structure. In the present embodiment, the height direction H is the height direction of the frame body 10, and is in the same direction as the height direction of the support structure for mounting the device to be repaired. The length direction L and the width direction W are perpendicular to each other, and the length direction L is in the same direction as the axial direction of the first cantilever beam 12 and / or the second cantilever beam 13.

[0056] In the present embodiment, the number of the second trolley assemblies 40 is two, one end of each of the two second trolley assemblies 40 is slidingly arranged on the first cantilever beam 12 of each of the two frame bodies 10, and the other end of each of the two second trolley assemblies 40 is fixedly connected to the cross rail 20.

[0057] The first cantilever beam 12 and the second cantilever beam 13 are both spaced apart from the top end of the column 11. The frame 10 further comprises a first pull rod 141 and a second pull rod 142. The first pull rod 141 has two ends respectively connected to the top end of the column 11 and the end of the first cantilever beam 12 away from the column 11. The second pull rod 142 has two ends respectively connected to the top end of the column 11 and the end of the second cantilever beam 13 away from the column 11. In this way, by providing the first pull rod 141, a pulling force can be applied to the end of the first cantilever beam 12 away from the column 11, so that the first cantilever beam 12 can also maintain structural stability after bearing. Similarly, by providing the second pull rod 142, a pulling force can be applied to the end of the second cantilever beam 13 away from the column 11, so that the second cantilever beam 13 can also maintain structural stability after bearing. However, it is not limited thereto, and in other embodiments, only the first pull rod 141 or only the second pull rod 142 can be provided according to design requirements.

[0058] In the present embodiment, the frame 10 further comprises a first connecting assembly 15 connecting the first pull rod 141 and the first cantilever beam 12. The first connecting assembly 15 comprises first connecting plates 151 respectively clamped on both sides of the first cantilever beam 12 along the width direction W, and the first pull rod 141 is connected to one end of the first connecting plates 151 along the height direction H through a first fixing assembly 152. Specifically, the first fixing assembly 152 comprises a bolt and a nut matched therewith. The bolt is sequentially arranged in one of the first connecting plates 151, the first pull rod 141 and the other first connecting plate 151, and the corresponding nut fastens the bolt to the first connecting plate 151, thereby realizing the connection between the first pull rod 141 and the first cantilever beam 12. At the end of the first connecting plate 151 away from the first pull rod 141, the bolt is sequentially arranged in the two first connecting plates 151, and the corresponding nut fastens the bolt to the first connecting plate 151, thereby further clamping the two first connecting plates 151 on both sides of the first cantilever beam 12.

[0059] The frame body 10 further comprises a second connecting assembly 16 connecting the second pull rod 142 and the second cantilever beam 13. The second connecting assembly 16 comprises second connecting plates 161 respectively clamped on both sides of the second cantilever beam 13 along the width direction W, and the second pull rod 142 is connected to one end of the second connecting plates 161 along the height direction H through a second fixing assembly 162. Specifically, the second fixing assembly 162 comprises a bolt and a nut matched therewith, the bolt is sequentially arranged in one of the second connecting plates 161, the second pull rod 142 and the other second connecting plate 161, and the corresponding nut fastens the bolt on the second connecting plate 161, so as to realize the connection between the second pull rod 142 and the second cantilever beam 13. At the end of the second connecting plate 161 away from the second pull rod 142, the bolt is sequentially arranged in the two second connecting plates 161, and the corresponding nut fastens the bolt on the second connecting plate 161, so as to further clamp the two second connecting plates 161 on both sides of the second cantilever beam 13.

[0060] The frame body 10 further comprises a third connecting assembly 17 connecting the first pull rod 141 and the second pull rod 142. The third connecting assembly 17 comprises third connecting plates 171 respectively located on both sides of the stand 11 along the width direction W, and the third connecting plates 171 are fixedly connected with the stand 11. Specifically, the third connecting plates 171 and the stand 11 are fixedly connected together by welding.

[0061] The first pull rod 141 and the second pull rod 142 are respectively connected to both ends of the third connecting plates 171 along the length direction L through a third fixing assembly 172. Specifically, the third fixing assembly 172 comprises a bolt and a nut matched therewith, one of the bolts is sequentially arranged in one of the third connecting plates 171, the first pull rod 141 and the other third connecting plate 171, and the corresponding nut fastens the bolt on the third connecting plate 171; similarly, the other bolt is sequentially arranged in one of the third connecting plates 171, the second pull rod 142 and the other third connecting plate 171, and the corresponding nut fastens the bolt on the third connecting plate 171, so as to realize that the two third connecting plates 171 clamp the stand 11 while connecting the first pull rod 141 and the second pull rod 142. In order to further strengthen the connection strength of the first pull rod 141 and the second pull rod 142, the shapes of the two third connecting plates 171 are both triangular structures with the same size, two apex angles of each third connecting plate 171 are respectively connected with the first pull rod 141 and the second pull rod 142, and the third angle of each third connecting plate 171 is upwardly arranged and fixedly connected with the two third connecting plates 171 through the bolt and the nut.

[0062] The frame body 10 further comprises a fourth connecting assembly 18 connecting the first cantilever beam 12 and the second cantilever beam 13. The fourth connecting assembly 18 comprises fourth connecting plates 181 respectively located on both sides of the stand 11 along the width direction W, and the fourth connecting plates 181 are fixedly connected with the stand 11. Specifically, the fourth connecting plates 181 and the stand 11 are fixedly connected together by welding.

[0063] The first cantilever beam 12 and the second cantilever beam 13 are respectively connected to both ends of the fourth connecting plates 181 along the length direction L through fourth fixing assemblies 182. Specifically, the fourth fixing assemblies 182 comprise bolts and nuts matched therewith, one of the bolts is sequentially arranged in one of the fourth connecting plates 181, the first cantilever beam 12 and the other third connecting plate 171, and the corresponding nut fastens the bolt on the fourth connecting plate 181; similarly, the other bolt is sequentially arranged in one of the fourth connecting plates 181, the second cantilever beam 13 and the other fourth connecting plate 181, and the corresponding nut fastens the bolt on the fourth connecting plate 181, so as to realize clamping of the two fourth connecting plates 181 on the stand 11 and connection of the first cantilever beam 12 and the second cantilever beam 13.

[0064] In the embodiment, the frame body 10 further comprises a support leg 19, the support leg 19 is arranged in the same direction as the stand 11, the top end of the support leg 19 is connected with the stand 11, and the bottom end of the support leg 19 is arranged in a spaced manner with the bottom end of the stand 11. In this way, by arranging the support leg 19, the stand 11 can be assisted and supported.

[0065] The replacement device 1 further comprises a first transverse support 50, both ends of the first transverse support 50 are respectively connected with the first cantilever beams 12 of the two frame bodies 10. In this way, by arranging the first transverse support 50, the overall structure of the replacement device 1 can be more stable. Specifically, the first transverse support 50 is a rod-shaped structure, but is not limited thereto, and can also be other components with supporting strength.

[0066] Preferably, the replacement device 1 further comprises a second transverse support 60, both ends of the second transverse support 60 are respectively connected with the first cantilever beam 12 of one of the frame bodies 10 and the second cantilever beam 13 of the other frame body 10. In this way, by arranging the second transverse support 60, the overall structure of the replacement device 1 can be more stable. Specifically, in the embodiment, the first transverse support 50 is a wire rope. The number of the first transverse supports 50 is two, and the two first transverse supports 50 are arranged in a crossed manner. However, it is not limited thereto, and can also be other components with supporting strength.

[0067] The transverse rail 20 is provided with a transverse sliding groove 21, and the first pulley set 31 of the first trolley assembly 30 is slidingly arranged in the transverse sliding groove 21. In this way, the transverse sliding groove 21 is arranged to accommodate the first pulley set 31, and the movement track of the first pulley set 31 can be limited. The two ends of the transverse sliding groove 21 along the width direction W are respectively provided with a first blocking piece 22, and the first blocking piece 22 is used to block the first pulley set 31 from leaving the transverse sliding groove 21. In the embodiment, the first blocking piece 22 is a stop block arranged in the transverse sliding groove 21, but is not limited thereto, and in other embodiments, it can also be a baffle arranged at the end of the transverse sliding groove 21.

[0068] The number of transverse sliding grooves 21 is two, and each is arranged on the two sides of the transverse rail 20 along the length direction L; the first trolley assembly 30 includes two groups of first pulley sets 31, and each group of first pulley sets 31 includes at least two pulleys, and the two groups of first pulley sets 31 are slidingly arranged in the two transverse sliding grooves 21, respectively.

[0069] Each first cantilever beam 12 is provided with a longitudinal sliding groove 121, and the second pulley set 41 of the two second trolley assemblies 40 is slidingly arranged in the longitudinal sliding groove 121 on the two first cantilever beams 12, respectively; and each longitudinal sliding groove 121 is provided with a second blocking piece at an end away from the stand 11, and the second blocking piece is used to block the second pulley set 41 from leaving the longitudinal sliding groove 121. In the embodiment, the first connecting plate 151 of the first connecting assembly 15 arranged at the end of the first cantilever beam 12 away from the stand 11 (i.e., the end of the longitudinal sliding groove 121) is used as the second blocking piece. But it is not limited thereto, and in other embodiments, the second blocking piece can also be a stop block arranged in the longitudinal sliding groove 121.

[0070] The installation process of the replacement device 1 in the embodiment is as follows: after the stand 11 is installed on the top of the corresponding support structure of the device to be repaired, the first cantilever beam 12 and the second cantilever beam 13, the first pull rod 141 and the second pull rod 142 are installed on the two sides of the stand 11 along the length direction L and connected by bolts and nuts; the first transverse support 50 is installed between the two first cantilever beams 12 and fixed, the second transverse support 60 (steel wire rope) is installed, and the rotating nut on the steel wire rope is adjusted to tighten the steel wire rope; the second trolley assembly 40 is installed on the two first cantilever beams 12, the transverse rail 20 is hung on the second trolley assembly 40, the first hanging trolley assembly is installed on the transverse rail 20, the first blocking piece 22 is arranged in the transverse sliding groove 21 of the transverse rail 20, and the bolts and nuts are used for fixing; the top end of the stand 11 is fixed with the first pull rod 141 and the second pull rod 142 through the third connecting assembly 17, and at the same time, the third connecting assembly 17 also plays a protective role on the top end of the stand 11; after the above installation is completed, the outrigger 19 is installed on the outside of the two stands 11, and the bolts are used for fixing.

[0071] The working principle of the replacement device 1 of the embodiment: the cross rail 20 is slid along the length direction L back and forth in parallel with the first trolley assembly 30 and the second trolley assembly 40 arranged on the two first cantilever beams 12, and the first trolley assembly 30 arranged on one end of the cross rail 20 can slide left and right along the width direction W, so as to ensure that the point to be worked on can be reached. Before work, a counterweight is hung at the lower end of the second cantilever beam 13, and the weight is the weight of the equipment to be repaired, so as to ensure the stability of the tower structure during the movement of the heavy object. During work, a hand chain block can be hung at the lower end of the first trolley assembly 30, the equipment to be repaired is lifted, and then the first trolley assembly 30 and the cross rail 20 are pulled to move the equipment to be repaired to the point to be placed. If the replacement span is large, multiple replacement devices 1 can be used side by side to transfer the heavy object between them.

[0072] During work, according to the actual lifting needs, the lengths of the first cantilever beam 12, the second cantilever beam 13 and the cross rail 20 are selected to control the span within three meters as soon as possible, so as to ensure that the weight of the cross rail 20 is not too heavy and facilitate installation. The weight of a single piece of the replacement device 1 is controlled within 20 kg, and the length of a single piece is controlled within three meters, which facilitates carrying and installation. The counterweight on the second cantilever beam 13 needs to be counterweighted according to the actual weight of the equipment to be repaired during lifting.

[0073] The structure of the replacement device 1 of the embodiment is a tower crane type structure, which can meet the replacement needs of different positions. The tower crane type structure is fixed at multiple points to improve the stability during operation, and the split and spliced structure is light in weight, convenient to carry and install, can effectively and quickly replace, and the operation mode is simple.

[0074] Although the specific embodiments of the present application are described above, those skilled in the art should understand that this is only an example, and the protection scope of the present application is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of the present application, and these changes and modifications all fall within the protection scope of the present application.

Claims

1. A replacement device for replacing a device to be repaired of a wind power plant, characterized in that The replacement device comprises: two frame bodies arranged side by side, each of the frame bodies comprising a vertical column, a first cantilever beam and a second cantilever beam, the vertical column being arranged along a height direction and detachably connected to a top of a support structure for mounting the equipment to be repaired, the first cantilever beam and the second cantilever beam each being arranged along a length direction and connected to both sides of the vertical column along the length direction respectively; a cross rail arranged along a width direction, and two ends of the cross rail being connected to the first cantilever beams of the two frame bodies respectively; a first trolley assembly arranged on the cross rail and used for being connected to the equipment to be repaired; a second trolley assembly, one end of the second trolley assembly being arranged on the first cantilever beam along the height direction, and the other end of the second trolley assembly being fixedly connected to the cross rail; wherein the second cantilever beam is capable of suspending a counterweight matched with the weight of the equipment to be repaired.

2. The changing apparatus of claim 1, wherein, The first cantilever beam and the second cantilever beam each have a spacing from a top end of the vertical column; the frame body further comprises a first pull rod, two ends of the first pull rod being connected to the top end of the vertical column and an end of the first cantilever beam away from the vertical column respectively; and / or, the frame body further comprises a second pull rod, two ends of the second pull rod being connected to the top end of the vertical column and an end of the second cantilever beam away from the vertical column respectively.

3. The exchange apparatus of claim 2, wherein, the frame body further comprises a first connecting assembly connecting the first pull rod and the first cantilever beam, the first connecting assembly comprising first connecting plates respectively clamped on both sides of the first cantilever beam along the width direction, and the first pull rod being connected to one end of the first connecting plates along the height direction through a first fixing assembly; and / or, the frame body further comprises a second connecting assembly connecting the second pull rod and the second cantilever beam, the second connecting assembly comprising second connecting plates respectively clamped on both sides of the second cantilever beam along the width direction, and the second pull rod being connected to one end of the second connecting plates along the height direction through a second fixing assembly.

4. The exchange apparatus according to claim 2 or 3, characterized by, the frame body further comprises a third connecting assembly connecting the first pull rod and the second pull rod; the third connecting assembly comprises third connecting plates respectively located on both sides of the vertical column along the width direction, the third connecting plates being fixedly connected to the vertical column, and the first pull rod and the second pull rod being connected to both ends of the third connecting plates along the length direction through third fixing assemblies respectively.

5. The exchange apparatus according to any one of claims 1 to 4, characterized by, the frame body further comprises a fourth connecting assembly connecting the first cantilever beam and the second cantilever beam; the fourth connecting assembly comprises fourth connecting plates respectively located on both sides of the vertical column along the width direction, the fourth connecting plates being fixedly connected to the vertical column, and the first cantilever beam and the second cantilever beam being connected to both ends of the fourth connecting plates along the length direction through fourth fixing assemblies respectively.

6. The exchange apparatus according to any one of claims 1 to 5, wherein the frame body further comprises a support leg, the support leg being arranged in the same direction as the vertical column, a top end of the support leg being connected to the vertical column, and a bottom end of the support leg being arranged in a spaced manner from a bottom end of the vertical column.

7. The exchange apparatus according to any one of claims 1 to 6, wherein The replacement device further comprises a first transverse support, two ends of the first transverse support are connected with the first cantilever beams of the two frame bodies respectively.

8. The exchange apparatus according to any one of claims 1 to 7, characterized by, The replacement device further comprises a second transverse support, two ends of the second transverse support are connected with the first cantilever beam of one of the frame bodies and the second cantilever beam of the other frame body respectively.

9. The exchange apparatus of any one of claims 1-8, wherein, The cross rail is provided with a transverse sliding groove, and the first pulley block of the first pulley block assembly is slidingly arranged in the transverse sliding groove. Two ends of the transverse sliding groove along the width direction are respectively provided with a first blocking piece, and the first blocking piece is used for blocking the first pulley block from being separated from the transverse sliding groove.

10. The exchange apparatus according to any one of claims 1 to 9, wherein Each of the first cantilever beams is provided with a longitudinal sliding groove, and the second pulley block of the two second pulley block assemblies is slidingly arranged in the longitudinal sliding groove on the two first cantilever beams respectively. Each of the longitudinal sliding grooves is provided with a second blocking piece at an end away from the stand column, and the second blocking piece is used for blocking the second pulley block from being separated from the longitudinal sliding groove.

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