Lifting appliance for lifting gas turbine blade

Abstract

The utility model relates to a lifting appliance for lifting a gas turbine blade, and the lifting appliance comprises a clamping assembly which is provided with a first clamping part and a second clamping part which can move relatively, and the friction force between the first clamping surface and the upper section of a blade body and the friction force between the second clamping surface and the upper section can lift the gas turbine blade under the combined action; the suspension arm assembly comprises a first arm and a second arm, the lower end of the first arm is connected with the first clamping part, and the lower end of the second arm is connected with the second clamping part; the cross beam assembly is horizontally arranged and connected with the first arm and the second arm, the two ends of the connecting assembly are connected with the upper end of the first arm and the upper end of the second arm respectively, the middle of the connecting assembly is used for being connected to a connecting part of the crane, and the connecting assembly is configured to enable the upper end of the first arm and the upper end of the second arm to be close to each other during hoisting. The first arm lower end and the second arm lower end are close to each other. By means of the lifting appliance, the blade can be lifted easily, and manual carrying is replaced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of mechanical hoisting, in particular to a lifting appliance for hoisting gas turbine blades. BACKGROUND

[0002] In the existing manufacturing and maintenance process of gas turbine blades, the transportation of blades usually relies on human power, especially between multiple work areas in the factory. For example, B3 blades, as a typical representative, have a net weight of up to 26 kg, while according to the national standard for body force transportation weight limit, the human body's suitable transportation weight limit is only 15 kg. Therefore, frequent manual transportation not only exceeds the recommended range of physical labor for health and safety, but also poses a safety risk of dropping and damaging the product and hitting people during manual transportation.

[0003] In addition, the gas turbine blades also include B4 blades weighing up to 51 kg and other new blades that are heavier or more complex in shape. In the face of such heavy blades, the traditional manual transportation method obviously cannot meet the needs of safe operation and is likely to cause damage or even scrap of the blades during transportation.

[0004] In actual operation, the transportation of blades also faces other challenges. The special shape and center of gravity distribution of the blades make them difficult to be stably fixed, increasing the risk of dropping and shaking during lifting. This increase in instability makes it very difficult to accurately control the blades during lifting and placement, thereby affecting production efficiency and safety. SUMMARY

[0005] The utility model aims to provide a lifting appliance for hoisting gas turbine blades, replacing manual transportation, and vertically lifting gas turbine blades, especially B3 and B4 blades.

[0006] According to the utility model, provide the lifting appliance for hoisting gas turbine blade, the gas turbine blade includes the blade body and the blade root part and the blade top part at the opposite both ends of blade body, specially, the lifting appliance includes: clamping assembly, with can opposite first clamping part and second clamping part, first clamping part and second clamping part cooperation form clamping space, the clamping space is suitable for receiving the upper section of blade body close to blade top part, wherein, first clamping part has for abutting the vertical extension of upper section first clamping surface, and second clamping part has for abutting the vertical extension of upper section second clamping surface, the friction between first clamping surface and upper section and the friction between second clamping surface and upper section jointly can hoist the gas turbine blade, lifting arm assembly, including the first arm and second arm of cross arrangement, first arm includes first arm upper segment, first arm lower segment and the first arm pivot joint between first arm upper segment and first arm lower segment, first arm still includes the first arm upper end at the upper end of first arm upper segment and the first arm lower end at the lower end of first arm lower segment, second arm includes second arm upper segment, second arm lower segment and the second arm pivot joint between second arm upper segment and second arm lower segment, second arm still includes the second arm upper end at the upper end of second arm upper segment and the second arm lower end at the lower end of second arm lower segment, first arm lower end is connected with first clamping part, and second arm lower end is connected with second clamping part, crossbeam assembly, horizontal arrangement, with first arm and second arm connection, including crossbeam first pivot joint connected with first arm pivot joint and crossbeam second pivot joint connected with second arm pivot joint, crossbeam first pivot joint and crossbeam second pivot joint are spaced apart along the horizontal direction, and connection assembly, two ends of connection assembly are connected first arm upper end and second arm upper end respectively, and the middle part of connection assembly is used to connect to the connecting portion of crane to lift the gas turbine blade, the connection assembly is configured to make first arm upper end and second arm upper end close to each other when hoisting, so that first arm lower end and second arm lower end close to each other.

[0007] In this way, the lifting appliance of the utility model adopts mechanical non-powered design, easily hoists blade product, replaces manual handling, and eliminates the damage to human body and the risk of scrapping blade product caused by handling.

[0008] In an exemplary embodiment, the connection assembly is a double-chain lifting ring assembly having a lifting ring and first and second chains connected to the lifting ring, the lifting ring being used to connect to the connecting portion of the crane, the first chain being hinged to the first arm upper end, and the second chain being hinged to the second arm upper end.

[0009] In this way, the double-chain sling assembly enhances the stable connection between the sling and the crane, improves the accuracy and safety of the operation, and greatly reduces the shaking of the blade during the handling process.

[0010] In an exemplary embodiment, the first lower arm section is bent towards the direction of the clamping space relative to the first upper arm section, the second lower arm section is bent towards the direction of the clamping space relative to the second upper arm section, the sling further comprises a first auxiliary arm arranged in parallel with the first lower arm section, the upper end of the first auxiliary arm is hinged to the beam assembly, and the lower end of the first auxiliary arm is hinged to the upper end of the first clamping component; and the sling further comprises a second auxiliary arm arranged in parallel with the second lower arm section, the upper end of the second auxiliary arm is hinged to the beam assembly, and the lower end of the second auxiliary arm is hinged to the upper end of the second clamping component.

[0011] In this way, the introduction of the first auxiliary arm and the second auxiliary arm increases the stability of the sling during the lifting process, avoids the shaking of the blade during the handling process, and improves the handling efficiency and safety.

[0012] In an exemplary embodiment, the beam assembly comprises a first main beam and a second main beam arranged in parallel with each other, and a receiving space for accommodating the first arm and the second arm is formed between the first main beam and the second main beam, wherein the first arm is connected between the first main beam and the second main beam at the first arm pivot point by a first connecting pin, and the second arm is connected between the first main beam and the second main beam at the second arm pivot point by a second connecting pin; wherein the upper end of the first auxiliary arm is connected to between the first main beam and the second main beam by a fifth connecting pin; and the upper end of the second auxiliary arm is connected to between the first main beam and the second main beam by a seventh connecting pin.

[0013] In this way, the structural design of the beam assembly ensures the stability of the sling and reduces the risk of damage and falling of the blade.

[0014] In an exemplary embodiment, the first upper arm section and the second upper arm section intersect, and the first upper arm section has a protruding first arm protrusion at the intersection position, and the second upper arm section has a protruding second arm protrusion at the intersection position, the second arm protrusion and the first arm protrusion contact and move relative to each other during the relative movement of the first arm and the second arm; and the sling further comprises a locking device, the locking device comprises a locking hole provided on the second arm protrusion and the first arm protrusion, and a locking pin capable of entering and exiting the locking hole.

[0015] In this way, the stability of the blade during hoisting is ensured by the constraint of the first arm protrusion and the second arm protrusion. It can be understood that during the relative movement of the first arm and the second arm, the locking pin is located outside the locking hole. For example, during the transportation of the lifting device, the locking pin can be in the locking hole to maintain the locking state, facilitating transportation and improving safety.

[0016] In an exemplary embodiment, a first handle is arranged in the middle region of the first main beam for the operator to hold when positioning the lifting device before hoisting, and a second handle is arranged in the middle region of the second main beam for the operator to hold when positioning the lifting device before hoisting.

[0017] In this way, the arrangement of the handles on the first main beam and the second main beam provides the operator with better control and positioning, especially when preparing to hoist and position the blade.

[0018] In an exemplary embodiment, the first clamping component includes a first mounting portion and a first clamping block, the first mounting portion includes a first horizontal wall and a first vertical wall connected to each other, the first horizontal wall extends from the upper end of the first vertical wall away from the second clamping component, the first horizontal wall is connected to the lower end of the first arm, the first clamping block is mounted to the first vertical wall, and the surface of the first clamping block facing the blade body is the first clamping surface; and the second clamping component includes a second mounting portion and a second clamping block, the first mounting portion includes a second horizontal wall and a second vertical wall connected to each other, the second horizontal wall extends from the upper end of the second vertical wall away from the first clamping component, the second horizontal wall is connected to the lower end of the second arm, the second clamping block is mounted to the second vertical wall, and the surface of the second clamping block facing the blade body is the second clamping surface.

[0019] In this way, the design of the first clamping component and the second clamping component can ensure the stability and safety of the blade during transportation. The combination of the first mounting portion and the first clamping block, and the combination of the second mounting portion and the second clamping block, provide all-round support for the blade, avoiding damage to the blade during transportation.

[0020] In an exemplary embodiment, the first mounting portion of the first clamping component further includes a first reinforcing rib connected between the first horizontal wall and the first vertical wall; and the second mounting portion of the second clamping component further includes a second reinforcing rib connected between the second horizontal wall and the second vertical wall.

[0021] In this way, the first and second reinforcing ribs significantly enhance the structural strength of the first and second clamping components, reduce deformation under high load, and ensure the stability and durability of the lifting device when lifting the blade. The design of the reinforcing ribs also optimizes the use of materials, achieving a balance between lightweight and strength of the structure.

[0022] In an exemplary embodiment, the first horizontal wall of the first mounting portion has a parallel pair of first auxiliary crossbeams, and the lower end of the first arm is connected to the space between the pair of first auxiliary crossbeams by a third connecting pin; the second horizontal wall of the second mounting portion has a parallel pair of second auxiliary crossbeams, and the lower end of the second arm is connected to the space between the pair of second auxiliary crossbeams by a fourth connecting pin; and wherein the lower end of the first auxiliary arm is connected to the pair of first auxiliary crossbeams by a sixth connecting pin, and the lower end of the second auxiliary arm is connected to the pair of second auxiliary crossbeams by an eighth connecting pin.

[0023] In this way, the carrying capacity and stability of the lifting device during lifting are improved.

[0024] In an exemplary embodiment, the first clamping surface and the second clamping surface are both flat surfaces, and the first clamping surface and the second clamping surface are both made of polyurethane material.

[0025] In this way, the flat polyurethane clamping surface design can provide sufficient friction to firmly clamp the blade, and can also avoid damage to the surface of the blade. The polyurethane material can maintain good clamping performance for a long time due to its high wear resistance and chemical stability, and is suitable for frequent lifting operations.

[0026] In summary, the lifting device for lifting gas turbine blades can achieve the following beneficial technical effects.

[0027] First, the lifting device of the present utility model adopts a mechanical non-powered design, uses a crane to lift the lifting device upward, uses the friction principle of the clamping surface such as polyurethane of the lifting device to clamp the blade, and realizes safe and reliable lifting work.

[0028] Second, the lifting device of the present utility model is designed by simulating and calculating the center of gravity of the blade through software, and the load of the lifting device is 60KG, which ensures the convenience of clamping.

[0029] Third, the lifting device of the present utility model easily lifts the product, replaces manual carrying, and eliminates the harm to the human body and the scrapping of the product caused by carrying. BRIEF DESCRIPTION OF DRAWINGS

[0030] The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate exemplary embodiments of the application and together with the description serve to explain the application. In the drawings:

[0031] Figure 1 is a schematic perspective view of a vertical handling condition of a B3 type gas turbine blade.

[0032] Figure 2 is a schematic perspective view of a vertical handling condition of a B4 type gas turbine blade.

[0033] Figure 3 is a schematic front view of a sling for hoisting a gas turbine blade according to an embodiment of the application.

[0034] Figure 4 is a schematic side view of a sling for hoisting a gas turbine blade according to an embodiment of the application.

[0035] Figure 5 is a schematic perspective view of a sling for hoisting a gas turbine blade according to an embodiment of the application.

[0036] Figure 6 is a schematic top view of a sling for hoisting a gas turbine blade according to an embodiment of the application.

[0037] Figure 7 is a schematic perspective view of a sling for hoisting a gas turbine blade according to an embodiment of the application, when hoisting one type of blade.

[0038] Figure 8 is a schematic perspective view of a sling for hoisting a gas turbine blade according to an embodiment of the application, when hoisting another type of blade.

[0039] Figure 9 is a schematic perspective view of a gripping assembly of a sling for hoisting a gas turbine blade according to an embodiment of the application, in an open condition.

[0040] Figure 10 is a schematic perspective view of a gripping assembly of a sling for hoisting a gas turbine blade according to an embodiment of the application, in a closed condition.

[0041] wherein the reference numerals are as follows:

[0042] 10. blade body

[0043] 11. blade root

[0044] 12. blade tip

[0045] 20. gripping assembly

[0046] 21. first clamping member

[0047] 211. first mounting portion

[0048] 212. first clamping block

[0049] 213. first horizontal wall

[0050] 214. first vertical wall

[0051] 215. first clamping surface

[0052] 216. first reinforcing rib

[0053] 22. second clamping member

[0054] 221. second mounting portion

[0055] 222. second clamping block

[0056] 223. second horizontal wall

[0057] 224. second vertical wall

[0058] 225. second clamping surface

[0059] 226. second reinforcing rib

[0060] 30. boom assembly

[0061] 31. first arm

[0062] 311. first arm upper end

[0063] 312. first arm lower end

[0064] 313. first handle

[0065] 314. locking pin

[0066] 316. first arm upper section

[0067] 317. first arm lower section

[0068] 318. first arm protrusion

[0069] 32. second arm

[0070] 321. second arm upper end

[0071] 322. second arm lower end

[0072] 323. second arm protrusion

[0073] 325. second handle

[0074] 326 second arm upper segment

[0075] 327 second arm lower segment

[0076] 40 connection assembly

[0077] 41 first chain

[0078] 42 second chain

[0079] 43 eyelet

[0080] 44 detection device

[0081] 60 beam assembly

[0082] 61 first main beam

[0083] 62 second main beam

[0084] 71 first connection pin

[0085] 72 second connection pin

[0086] 73 third connection pin

[0087] 74 fourth connection pin

[0088] 75 fifth connection pin

[0089] 76 sixth connection pin

[0090] 77 seventh connection pin

[0091] 78 eighth connection pin

[0092] 80 first auxiliary beam

[0093] 90 second auxiliary beam

[0094] 91 first auxiliary arm

[0095] 92 second auxiliary arm

[0096] S spanwise direction

[0097] C chordwise direction

[0098] A axial direction DETAILED DESCRIPTION

[0099] For those skilled in the technical field, the technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor should fall within the scope of protection of the present application. The nouns and pronouns about people in the present patent application are not limited to a specific gender.

[0100] Referring to Figure 1 and Figure 2 , respectively, schematic perspective views of a B3 and a B4 gas turbine blade in a vertical state are shown. The B3 blade weighs 26 KG. In many areas of the factory, the B3 blade needs to be manually carried, and the workers manually carry the blade from the turnover box to the workbench for a long time, and then carry it down. The physical carrying weight limit value is 15 KG according to the national standard. The repetitive carrying operation every day is harmful to the human body. Similar large blades like B3 also include B4 or other new products. The B4 blade weighs 51 KG, and a lifting appliance is needed to solve the carrying demand of lifting all the stationary vane blades vertically. The lifting appliance of the present application can lift such blade products.

[0101] The gas turbine blade includes a blade body 10 and a blade root 11 and a blade tip 12 located at opposite ends of the blade body 10. The gas turbine blade defines a spanwise direction S, a chordwise direction C, and an axial direction A perpendicular to the chordwise direction C and the spanwise direction S, which are schematically indicated in Figure 2 . It should be understood by those skilled in the art that the spanwise direction S is defined between the blade root 11 and the blade tip 12, and the blade body 10 includes two edges between which the chordwise direction C of the gas turbine blade is defined. It should be noted that the directional terms mentioned in the present application, such as up, down, high, low, etc., are directed to the direction of the gas turbine blade when it is vertically lifted, i.e., the direction when the spanwise direction S is in a vertical state. The directional term "inward" refers to the direction towards the blade body 10 (i.e., towards the clamping space of the clamp), and the directional term "outward" refers to the direction away from the blade body 10 (i.e., away from the clamping space of the clamp).

[0102] Referring to Figure 3 and Figure 5 , respectively, schematic front views and schematic perspective views of a lifting appliance for lifting a gas turbine blade according to an embodiment of the present application are shown. The lifting appliance mainly includes a clamping assembly 20, a lifting arm assembly 30, a crossbeam assembly 60, and a connecting assembly 40.

[0103] As Figure 3 and Figure 5As shown, the clamping assembly 20 has a first clamping part 21 and a second clamping part 22 which are movable relative to each other, the first clamping part 21 and the second clamping part 22 cooperating to form a clamping space which is adapted to receive an upper section of the blade 10 near the tip 12, wherein the first clamping part 21 has a vertically extending first clamping surface 215 for abutting the upper section and the second clamping part 22 has a vertically extending second clamping surface 225 for abutting the upper section, the friction between the first clamping surface 215 and the upper section and the friction between the second clamping surface 225 and the upper section together acting to lift the gas turbine blade.

[0104] As shown in Figure 3 and Figure 5 the boom assembly 30 comprises a first arm 31 and a second arm 32 which are arranged crosswise, the first arm 31 comprising a first arm upper section 316, a first arm lower section 317 and a first arm pivot point between the first arm upper section 316 and the first arm lower section 317, the first arm 31 further comprising a first arm upper end 311 at an upper end of the first arm upper section 316 and a first arm lower end 312 at a lower end of the first arm lower section 317, the second arm 32 comprising a second arm upper section 326, a second arm lower section 327 and a second arm pivot point between the second arm upper section 326 and the second arm lower section 327, the second arm 32 further comprising a second arm upper end 321 at an upper end of the second arm upper section 326 and a second arm lower end 322 at a lower end of the second arm lower section 327, the first arm lower end 312 being connected to the first clamping part 21 and the second arm lower end 322 being connected to the second clamping part 22.

[0105] As shown in Figure 3 and Figure 5 the crossbeam assembly 60 is arranged horizontally, connected to the first arm 31 and the second arm 32, comprising a crossbeam first pivot point connected to the first arm pivot point and a crossbeam second pivot point connected to the second arm pivot point, the crossbeam first pivot point and the crossbeam second pivot point being spaced apart in horizontal direction. From Figure 5 it can be seen that the crossbeam assembly 60 can comprise a first main crossbeam 61 and a second main crossbeam 62 which are arranged parallel to each other, forming an accommodation space between the first main crossbeam 61 and the second main crossbeam 62 for accommodating the first arm 31 and the second arm 32, wherein the first arm 31 is connected at the first arm pivot point between the first main crossbeam 61 and the second main crossbeam 62 by means of a first connecting pin 71 and the second arm 32 is connected at the second arm pivot point between the first main crossbeam 61 and the second main crossbeam 62 by means of a second connecting pin 72.

[0106] As shown in Figure 3 and Figure 5As shown, the two ends of the connecting assembly 40 are connected to the first arm upper end 311 and the second arm upper end 321 respectively, the middle part of the connecting assembly 40 is used to be connected to the connecting part of the crane to lift the gas turbine blade, the connecting assembly 40 is configured to make the first arm upper end 311 and the second arm upper end 321 close to each other when hoisting, so as to make the first arm lower end 312 and the second arm lower end 322 close to each other. Preferably, the connecting assembly 40 is a double-chain sling assembly, which has a sling 43 and a first chain 41 and a second chain 42 connected to the sling 43, the sling 43 is used to be connected to the connecting part of the crane, the first chain 41 is hinged to the first arm upper end 311, and the second chain 42 is hinged to the second arm upper end 321. It can be understood that the connecting assembly 40 can also be other styles of assemblies, for example, the first chain 41 and the second chain 42 can be replaced by two ropes or two rods.

[0107] With reference to Figure 3 and Figure 5 , the spreader further comprises a first auxiliary arm 91, which is arranged adjacent to the first arm lower section 317, the upper end of the first auxiliary arm 91 is hinged to the crossbeam assembly 60, and the lower end of the first auxiliary arm 91 is hinged to the upper end of the first clamping part 21; and the spreader further comprises a second auxiliary arm 92, which is arranged adjacent to the second arm lower section 327, the upper end of the second auxiliary arm 92 is hinged to the crossbeam assembly 60, and the lower end of the second auxiliary arm 92 is hinged to the upper end of the second clamping part 22.

[0108] The first arm lower section 317 is bent towards the direction of the clamping space relative to the first arm upper section 316, which can also be called inward bending, the second arm lower section 327 is bent towards the direction of the clamping space relative to the second arm upper section 326, which can also be called inward bending, the upper end of the first auxiliary arm 91 is connected to the first main crossbeam 61 and the second main crossbeam 62 through the fifth connecting pin 75; and the upper end of the second auxiliary arm 92 is connected to the first main crossbeam 61 and the second main crossbeam 62 through the seventh connecting pin 77.

[0109] As Figure 5As shown, the first arm upper section 316 and the second arm upper section 326 intersect, and the first arm upper section 316 has a protruding first arm protrusion 318 at the intersection position, which can protrude on both sides, and the second arm upper section 326 has a protruding second arm protrusion 323 at the intersection position, which can protrude on one side. During relative movement of the first arm 31 and the second arm 32, the second arm protrusion 323 and the first arm protrusion 318 contact and move relative to each other to constrain and limit the stroke. The spreader can also include a locking device, which includes locking holes provided on the second arm protrusion 323 and the first arm protrusion 318 and a locking pin 314 capable of entering and exiting the locking holes. It should be noted that during relative movement of the first arm 31 and the second arm 32, the locking pin 314 is located outside the locking holes to allow relative movement of the first arm 31 and the second arm 32. For example, during transportation of the spreader, the locking pin 314 can enter the locking holes to maintain a locked state, facilitating transportation.

[0110] As shown in FIG. 1, the first arm 31 and the second arm 32 are connected to the first main cross beam 61 and the second main cross beam 62, respectively, and the first arm 31 and the second arm 32 are connected to each other through the first connecting rod 33 and the second connecting rod 34. Figure 5 As shown, a first handle 313 is provided in the middle region of the first main cross beam 61 for the operator to hold when positioning the spreader before lifting, and a second handle 325 is provided in the middle region of the second main cross beam 62 for the operator to hold when positioning the spreader before lifting.

[0111] As shown in FIG. 1, the first arm 31 and the second arm 32 are connected to the first main cross beam 61 and the second main cross beam 62, respectively, and the first arm 31 and the second arm 32 are connected to each other through the first connecting rod 33 and the second connecting rod 34. Figure 5 As shown, the first clamping component 21 includes a first mounting portion 211 and a first clamping block 212, the first mounting portion 211 includes a first horizontal wall 213 and a first vertical wall 214 connected to each other, the first horizontal wall 213 extends from the upper end of the first vertical wall 214 in a direction away from the second clamping component, the first horizontal wall 213 is connected to the first arm lower end 312, the first clamping block 212 is mounted to the first vertical wall 214, and the surface of the first clamping block 212 facing the blade 10 is the first clamping surface 215; and the second clamping component 22 includes a second mounting portion 221 and a second clamping block 222, the first mounting portion 211 includes a second horizontal wall 223 and a second vertical wall 224 connected to each other, the second horizontal wall 223 extends from the upper end of the second vertical wall 224 in a direction away from the first clamping component 21, the second horizontal wall 223 is connected to the second arm lower end 322, the second clamping block 222 is mounted to the second vertical wall 224, and the surface of the second clamping block 222 facing the blade is the second clamping surface 225.

[0112] As shown in FIG. 1, the first arm 31 and the second arm 32 are connected to the first main cross beam 61 and the second main cross beam 62, respectively, and the first arm 31 and the second arm 32 are connected to each other through the first connecting rod 33 and the second connecting rod 34. Figure 5As shown, the first mounting portion 211 of the first clamping member 21 may further include a first reinforcing rib 216 connected between the first horizontal wall 213 and the first vertical wall 214; and the second mounting portion 221 of the second clamping member 22 may further include a second reinforcing rib 226 connected between the second horizontal wall 223 and the second vertical wall 224.

[0113] like Figure 5 As shown, the first mounting part 211 has a pair of parallel first auxiliary beams 80 on its first horizontal wall 213, and the lower end 312 of the first arm is connected to the space between the pair of first auxiliary beams 80 by a third connecting pin 73; the second mounting part 221 has a pair of parallel second auxiliary beams 90 on its second horizontal wall 223, and the lower end 322 of the second arm is connected to the space between the pair of second auxiliary beams 90 by a fourth connecting pin 74; and wherein the lower end of the first auxiliary arm 91 is connected to the pair of first auxiliary beams 80 by a sixth connecting pin 76, and the lower end of the second auxiliary arm 92 is connected to the pair of second auxiliary beams 90 by an eighth connecting pin 78.

[0114] It should be noted that the first auxiliary arm 91 and the lower section 317 of the first arm are two inclined sides, while the corresponding sections of the main crossbeam assembly and the first auxiliary crossbeam 80 are two horizontal sides. These four sides together form a quadrilateral, particularly a parallelogram. Similarly, the second auxiliary arm 92 and the lower section 327 of the second arm are two inclined sides, while the corresponding sections of the main crossbeam assembly and the second auxiliary crossbeam 90 are two horizontal sides. These four sides together form a quadrilateral, particularly a parallelogram. This ensures that the first and second clamping surfaces perform clamping actions when the blade is in a vertical position, thereby ensuring reliable clamping. The first connecting pin 71 to the eighth connecting pin 78 are all hinged devices, allowing pivotal movement of the first arm 31, the second arm 32, the first auxiliary arm 91, and the second auxiliary arm 92.

[0115] like Figure 5 As shown, both the first clamping surface 215 and the second clamping surface 225 are flat surfaces, and both are made of polyurethane. Both the first clamping block and the second clamping block can be made of polyurethane.

[0116] In addition, the connecting assembly may also include a detection device 44 for detecting the tension of at least one of the first chain 41 and the second chain 42.

[0117] Figure 7 and Figure 8A schematic perspective view of a lifting tool for lifting a gas turbine blade according to one embodiment of the application is shown in a lifted position. The lifting tool is designed as a mechanical, unpowered device. The lifting tool is lifted upwardly using a crane, and the workpiece is clamped using the frictional force between the polyurethane on the lifting tool and the workpiece, thereby achieving a safe and reliable lifting operation. The lifting tool is designed by software simulation and calculation of the center of gravity of the blade, and has a load capacity of 60 kg, thereby ensuring easy clamping. The welding of the lifting tool is performed in accordance with GB / T19867.1-2005, and the opening and breaking of the lifting tool are performed in accordance with GB / T985.1-2008. For the sake of convenience, Figure 9 A schematic perspective view of a clamping assembly of a lifting tool for lifting a gas turbine blade according to one embodiment of the application is shown in an open position, and Figure 10 A schematic perspective view of a clamping assembly of a lifting tool for lifting a gas turbine blade according to one embodiment of the application is shown in a clamped position.

[0118] The lifting tool of the present application is a general lifting tool for lifting a gas turbine blade B3 / B4 vertically, and can easily lift the product, thereby replacing manual handling and eliminating the risk of damage to the human body and product scrapping.

[0119] The above description is merely preferred embodiments of the present application, and it should be pointed out that, for those skilled in the art, without departing from the principles of the present application, a number of improvements and refinements can be made, and these improvements and refinements should also be considered as falling within the scope of the present application.

Claims

1. A spreader for hoisting a gas turbine blade, the gas turbine blade comprising a blade body (10) and a blade root (11) and a blade tip (12) at opposite ends of the blade body (10), characterised in that, The lifting device comprises: a clamping assembly (20) having a first clamping component (21) and a second clamping component (22) capable of relative movement, the first clamping component (21) and the second clamping component (22) cooperating to form a clamping space adapted to receive an upper section of the blade body (10) near the blade tip (12), wherein the first clamping component (21) has a vertically extending first clamping surface (215) for abutting the upper section, and the second clamping component (22) has a vertically extending second clamping surface (225) for abutting the upper section, the friction between the first clamping surface (215) and the upper section and the friction between the second clamping surface (225) and the upper section jointly acting to lift the gas turbine blade; a lifting arm assembly (30) comprising a first arm (31) and a second arm (32) arranged in a cross, the first arm (31) comprising a first arm upper section (316), a first arm lower section (317) and a first arm pivot joint between the first arm upper section (316) and the first arm lower section (317), the first arm (31) further comprising a first arm upper end (311) at an upper end of the first arm upper section (316) and a first arm lower end (312) at a lower end of the first arm lower section (317), the second arm (32) comprising a second arm upper section (326), a second arm lower section (327) and a second arm pivot joint between the second arm upper section (326) and the second arm lower section (327), the second arm (32) further comprising a second arm upper end (321) at an upper end of the second arm upper section (326) and a second arm lower end (322) at a lower end of the second arm lower section (327), the first arm lower end (312) being connected to the first clamping component (21) and the second arm lower end (322) being connected to the second clamping component (22); a crossbeam assembly (60) arranged horizontally and connected to the first arm (31) and the second arm (32), comprising a crossbeam first pivot joint connected to the first arm pivot joint and a crossbeam second pivot joint connected to the second arm pivot joint, the crossbeam first pivot joint and the crossbeam second pivot joint being spaced apart in a horizontal direction; and a connecting assembly (40) having two ends connected to the first arm upper end (311) and the second arm upper end (321) respectively, and a middle part for connecting to a connecting part of a crane to lift the gas turbine blade, the connecting assembly (40) being configured to bring the first arm upper end (311) and the second arm upper end (321) close to each other when lifting, so as to bring the first arm lower end (312) and the second arm lower end (322) close to each other.

2. The spreader for hoisting gas turbine blades according to claim 1, characterized in that, The connecting assembly (40) is a double chain sling assembly, having a sling (43) and a first chain (41) and a second chain (42) connected to the sling (43), the sling (43) is used to connect to the connecting part of the crane, the first chain (41) is hinged to the first arm upper end (311), and the second chain (42) is hinged to the second arm upper end (321).

3. The sling for hoisting gas turbine blades according to claim 1, characterized in that, the first arm lower section (317) is bent towards the direction of the clamping space relative to the first arm upper section (316), the second arm lower section (327) is bent towards the direction of the clamping space relative to the second arm upper section (326), the sling further comprises a first auxiliary arm (91), the first auxiliary arm (91) is arranged in parallel with the first arm lower section (317), the upper end of the first auxiliary arm (91) is hinged to the beam assembly (60), and the lower end of the first auxiliary arm (91) is hinged to the upper end of the first clamping component (21); and the sling further comprises a second auxiliary arm (92), the second auxiliary arm (92) is arranged in parallel with the second arm lower section (327), the upper end of the second auxiliary arm (92) is hinged to the beam assembly (60), and the lower end of the second auxiliary arm (92) is hinged to the upper end of the second clamping component (22).

4. The sling for hoisting gas turbine blades according to claim 3, characterized in that, the beam assembly comprises a first main beam (61) and a second main beam (62) arranged in parallel with each other, a containing space containing the first arm (31) and the second arm (32) is formed between the first main beam (61) and the second main beam (62), wherein the first arm (31) is connected between the first main beam (61) and the second main beam (62) at the first arm pivot point by a first connecting pin (71), and the second arm (32) is connected between the first main beam (61) and the second main beam (62) at the second arm pivot point by a second connecting pin (72); wherein the upper end of the first auxiliary arm (91) is connected between the first main beam (61) and the second main beam (62) by a fifth connecting pin (75), and the upper end of the second auxiliary arm (92) is connected between the first main beam (61) and the second main beam (62) by a seventh connecting pin (77).

5. A spreader for hoisting gas turbine blades according to any one of claims 1 to 3, characterised in that, The first arm upper section (316) and the second arm upper section (326) intersect, and the first arm upper section (316) has a protruding first arm protrusion (318) at the intersection position, and the second arm upper section (326) has a protruding second arm protrusion (323) at the intersection position, during the relative movement of the first arm (31) and the second arm (32), the second arm protrusion (323) and the first arm protrusion (318) contact and move relative to each other; And the spreader further comprises a locking device, the locking device comprising locking holes provided on the second arm protruding part (323) and the first arm protruding part (318) and a locking pin (314) capable of entering and exiting the locking holes.

6. The spreader for hoisting gas turbine blade according to claim 4, characterized in that, A first handle (313) is arranged in the middle region of the first main crossbeam (61) for the operator to hold when positioning the spreader before hoisting; and A second handle (325) is arranged in the middle region of the second main crossbeam (62) for the operator to hold when positioning the spreader before hoisting.

7. The spreader for hoisting gas turbine blade according to claim 3, characterized in that, The first clamping part (21) comprises a first mounting part (211) and a first clamping block (212), the first mounting part (211) comprises a first horizontal wall (213) and a first vertical wall (214) connected to each other, the first horizontal wall (213) extends from the upper end of the first vertical wall (214) in a direction away from the second clamping part, the first horizontal wall (213) is connected to the first arm lower end (312), the first clamping block (212) is mounted to the first vertical wall (214), and the surface of the first clamping block (212) facing the blade body (10) is the first clamping surface (215); and The second clamping part (22) comprises a second mounting part (221) and a second clamping block (222), the first mounting part (211) comprises a second horizontal wall (223) and a second vertical wall (224) connected to each other, the second horizontal wall (223) extends from the upper end of the second vertical wall (224) in a direction away from the first clamping part (21), the second horizontal wall (223) is connected to the second arm lower end (322), the second clamping block (222) is mounted to the second vertical wall (224), and the surface of the second clamping block (222) facing the blade body is the second clamping surface (225).

8. The spreader for hoisting gas turbine blade according to claim 7, characterized in that, The first mounting part (211) of the first clamping part (21) further comprises a first reinforcing rib (216) connected between the first horizontal wall (213) and the first vertical wall (214); and The second mounting part (221) of the second clamping part (22) further comprises a second reinforcing rib (226) connected between the second horizontal wall (223) and the second vertical wall (224).

9. The spreader for hoisting gas turbine blade according to claim 7, characterized in that, The first horizontal wall (213) of the first mounting part (211) has a pair of first auxiliary crossbeams (80) parallel thereto, and the first arm lower end (312) is connected to the space between the pair of first auxiliary crossbeams (80) through a third connecting pin (73). The second horizontal wall (223) of the second mounting portion (221) has a parallel pair of second auxiliary cross beams (90) thereon, and the lower end (322) of the second arm is connected to the space between the pair of second auxiliary cross beams (90) through a fourth connecting pin (74); and The lower end of the first auxiliary arm (91) is connected to the space between the pair of first auxiliary cross beams (80) through a sixth connecting pin (76), and the lower end of the second auxiliary arm (92) is connected to the space between the pair of second auxiliary cross beams (90) through an eighth connecting pin (78).

10. The spreader for hoisting a gas turbine vane according to any one of claims 1 to 3, characterized in that, The first clamping surface (215) and the second clamping surface (225) are both flat surfaces, and the first clamping surface (215) and the second clamping surface (225) are both made of polyurethane material.

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