Telescopic blade hanging beam

Abstract

The utility model relates to the technical field of blade hoisting, in particular to a telescopic blade hoisting beam which comprises a group of supporting beams, opposite surfaces of the supporting beams are fixedly connected, telescopic beams are arranged on the supporting beams in a sliding mode, telescopic assemblies are arranged between the telescopic beams and the supporting beams, and the telescopic assemblies are connected with the supporting beams. The telescopic assembly is used for driving the telescopic beam and the supporting beam to slide relatively, a lifting seat is arranged on the telescopic beam in a sliding mode, an adjusting assembly is arranged between the lifting seat and the telescopic beam and used for driving the lifting seat and the telescopic beam to slide relatively, and a clamping assembly is arranged at the bottom of the lifting seat. And the clamping assembly is used for connecting the blade with the lifting seat. The blade lifting appliance has the effect of improving the universality of the blade lifting appliance.

Description

TECHNICAL FIELD

[0001] The utility model relates to blade hoisting technical field especially a retractable blade beam. BACKGROUND

[0002] At present, during the installation of offshore wind turbines, the transfer of wind turbine blades needs to be completed. Specifically, after the transport ship of the blades arrives at the site, the blades need to be hoisted and transported to the work platform for pre-assembly. After the blades are folded with the hub, the whole is connected with the cabin of the wind turbine.

[0003] The related art has a Chinese patent with the authorization announcement number CN220745078U, which provides a hoist for wind turbine blades. It includes a main beam, a set of support beams installed at both ends of the main beam, a hand-operated hoist installed at the lower part of the support beam, and a sling connected to the hand-operated hoist. When hoisting the wind turbine blades, the hand-operated hoist and the sling are used to bind and hang the wind turbine blades on the lifting points of the support beam. Then, by lifting the main beam, the effect of hoisting the wind turbine blades is achieved.

[0004] During the implementation of the present application, the inventors found that there are at least the following problems in the technology: the slings on the hoist are installed on both sides of the main beam, and the distance between the slings is not easy to adjust. Since there are many specifications of wind turbine blades, the length and weight of the wind turbine blades vary. This results in different distances between the lifting points on wind turbine blades of different specifications. However, since the distance between the slings is not easy to adjust, different hoists need to be made for different specifications of blades during hoisting operations, resulting in low versatility of the blade hoist. UTILITY MODEL CONTENTS

[0005] In order to improve the versatility of the blade hoist, the present application provides a retractable blade beam.

[0006] The retractable blade beam provided by the present application adopts the following technical solution:

[0007] A retractable blade beam includes a set of support beams, the support beams are fixedly connected on opposite sides, a telescopic beam is slidably arranged on each support beam, a telescopic assembly is arranged between the telescopic beam and the support beam, the telescopic assembly is used to drive the telescopic beam and the support beam to slide relative to each other, a lifting seat is slidably arranged on the telescopic beam, an adjusting assembly is arranged between the lifting seat and the telescopic beam, the adjusting assembly is used to drive the lifting seat and the telescopic beam to slide relative to each other, a clamping assembly is arranged at the bottom of the lifting seat, and the clamping assembly is used to connect the blade with the lifting seat.

[0008] By adopting the technical scheme, according to the position of the lifting point on the blade, on the one hand, the adjusting assembly is used to drive the lifting seat to move along the telescopic beam, and on the other hand, the telescopic assembly is used to drive the telescopic beam to move along the support beam, so that the telescopic beam drives the lifting seat to move, thereby the clamping assembly is driven to move by the lifting seat, when the clamping assembly moves to the position of the lifting point of the blade, the clamping assembly is used to connect the blade and the lifting seat, then the effect of lifting the blade is realized by the way of lifting the support beam through the hoisting equipment, when lifting blades of different specifications, the lifting seat is adjusted according to the position of the lifting point of the blade, so that the blade lifting appliance is suitable for blades of various specifications, and the versatility of the blade lifting appliance is improved.

[0009] Preferably, a main lifting beam is arranged between the support beams, the opposite surfaces of the support beams are fixedly connected with the main lifting beam, a main lifting lug is fixedly arranged at the top of the main lifting beam, an upper traction ring seat and a lower traction ring seat are sleeved on the main lifting beam, the upper traction ring seat and the lower traction ring seat are fixedly connected with the main lifting beam, the upper traction ring seat is located between the lower traction ring seat and the main lifting lug, an outer traction rope is arranged between the telescopic beam and the upper traction ring seat, and an inner traction rope is arranged between the lifting seat and the lower traction ring seat.

[0010] By adopting the technical scheme, the hoisting equipment is bolted with the main lifting lug, the hoisting equipment lifts the support beam by lifting the main lifting lug, the outer traction rope pulls the telescopic beam, and the inner traction rope pulls the lifting seat, so that the bending and deformation of the telescopic beam and the support beam are reduced.

[0011] Preferably, an outer traction seat is fixedly arranged on the opposite surface of the telescopic beam, an outer lifting lug is fixedly arranged at the top of the outer traction seat, a group of upper winches are fixedly arranged on the upper traction ring seat, the outer traction rope is wound on the upper winch, one end of the outer traction rope is fixedly connected with the upper winch, and the other end of the outer traction rope is bolted with the outer lifting lug.

[0012] By adopting the technical scheme, when the telescopic beam is away from the main lifting beam, the upper winch pays out the outer traction rope, when the telescopic beam is close to the main lifting beam, the upper winch takes up the outer traction rope, and the outer traction rope is always kept in a state of tension.

[0013] Preferably, an inner lifting lug is fixedly arranged at the top of the lifting seat, a group of lower winches are fixedly arranged on the lower traction ring seat, the inner traction rope is wound on the lower winch, one end of the inner traction rope is fixedly connected with the lower winch, and the other end of the inner traction rope is bolted with the inner lifting lug.

[0014] By adopting the technical scheme, when the lifting seat is away from the main lifting beam, the lower winch pays out the inner traction rope, when the lifting seat is close to the main lifting beam, the lower winch takes up the inner traction rope, and the inner traction rope is always kept in a state of tension.

[0015] Preferably, the telescopic beam is provided with a through groove on each of the opposite surfaces, the support beam is inserted into the through groove, the side wall of the support beam is fixedly provided with a guide rail, the guide rail is provided with a guide wheel which is rotatably connected to the inner wall of the through groove.

[0016] When the telescopic assembly drives the telescopic beam to move, the telescopic beam moves along the guide rail through the guide wheel, and the guide wheel rolls to reduce the friction between the telescopic beam and the support beam, so that the telescopic beam and the support beam can move relative to each other.

[0017] Preferably, the telescopic assembly comprises a piston cylinder and a limiting block, the opposite surfaces of the support beam are provided with a driving groove, the piston cylinder is fixedly arranged in the driving groove, the output shaft of the piston cylinder is fixedly connected to the inner wall of the through groove, the outer wall of the support beam is provided with a limiting groove, and the limiting block is slidingly arranged in the limiting groove and fixedly connected to the outer wall of the telescopic beam.

[0018] When the telescopic beam and the support beam move relative to each other, the telescopic beam drives the limiting block to move in the limiting groove, and the limiting block limits the position of the telescopic beam to reduce the accidental sliding of the telescopic beam.

[0019] Preferably, the lifting seat is provided with a through hole, the telescopic beam is inserted into the through hole, the top of the telescopic beam is fixedly provided with a sliding rail, the sliding rail is provided with a plurality of pulleys which are rotatably connected to the inner wall of the through hole.

[0020] When the adjusting assembly drives the lifting seat to move, the lifting seat moves along the sliding rail through the pulleys, and the pulleys roll to reduce the friction between the lifting seat and the telescopic beam, so that the lifting seat and the telescopic beam can move relative to each other.

[0021] Preferably, the adjusting assembly comprises an adjusting motor, an adjusting screw, an adjusting seat and an adjusting block, the adjusting motor and the adjusting seat are fixedly arranged at the bottom of the telescopic beam, the output shaft of the adjusting motor is fixedly connected to one end of the adjusting screw, the other end of the adjusting screw is rotatably connected to the adjusting seat, the adjusting block is fixedly arranged in the through hole, and the adjusting block is threadedly connected to the adjusting screw.

[0022] When the adjusting motor is started, the adjusting screw rotates, the adjusting block moves, and the adjusting block drives the lifting seat to move.

[0023] As preferred, the clamping assembly comprises a sling, a clamping seat and a ring-shaped expansion sleeve, the top end of the sling is fixedly connected with the bottom of the lifting seat, the bottom end of the sling is fixedly connected with the top of the clamping seat, a insertion hole is arranged through the clamping seat, a ring groove is arranged on the inner wall of the insertion hole, the ring-shaped expansion sleeve is fixedly arranged in the ring groove, a ring-shaped cavity is arranged in the ring-shaped expansion sleeve, the ring-shaped cavity is used for storing hydraulic medium, a conduit is fixedly arranged on the ring-shaped expansion sleeve, a control valve is arranged on the conduit, and one end of the conduit is in communication with the ring-shaped cavity.

[0024] By adopting the above technical scheme, the blade is inserted into the ring-shaped expansion sleeve through the insertion hole, the ring-shaped expansion sleeve is sleeved on the blade, then the end of the conduit away from the ring-shaped cavity is communicated with the hydraulic medium source, then the control valve is opened, the hydraulic medium is injected into the ring-shaped cavity, as the hydraulic medium in the ring-shaped cavity increases, the ring-shaped expansion sleeve gradually expands, when the ring-shaped expansion sleeve expands to clamp the blade, the control valve is closed, the conduit is separated from the hydraulic medium, and the effect of connecting the blade with the lifting seat is realized.

[0025] In summary, the present application has at least one of the following beneficial technical effects:

[0026] 1. By arranging the support beam, the telescopic beam, the telescopic assembly, the lifting seat, the adjusting assembly and the clamping assembly, when lifting blades of different specifications, the lifting seat is adjusted according to the position of the blade lifting point, so that the blade lifting device is suitable for blades of various specifications, and the versatility of the blade lifting device is improved.

[0027] 2. By arranging the main lifting beam, the main lifting lug, the upper traction ring seat, the lower traction ring seat, the outer traction rope and the inner traction rope, the bending and deformation of the telescopic beam and the support beam is reduced.

[0028] 3. By arranging the sling, the clamping seat, the ring-shaped expansion sleeve, the insertion hole, the ring groove, the ring-shaped cavity, the conduit and the control valve, the effect of connecting the blade with the lifting seat is realized. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 is a schematic view of a telescopic blade lifting beam structure in the embodiment of the present application.

[0030] Figure 2 is a sectional view showing the connection relationship between the support beam and the telescopic beam in the embodiment of the present application.

[0031] Figure 3 is a sectional view showing the connection relationship between the lifting seat and the telescopic beam in the embodiment of the present application.

[0032] Figure 4 is a sectional view showing the positional relationship between the clamping seat and the ring-shaped expansion sleeve in the embodiment of the present application.

[0033] Explanation of reference signs: 1, support beam; 11, guide rail; 12, guide wheel; 2, telescopic beam; 21, through slot; 22, sliding rail; 23, pulley; 3, telescopic assembly; 31, piston cylinder; 311, driving groove; 32, limiting block; 321, limiting groove; 4, lifting seat; 41, through hole; 5, adjusting assembly; 51, adjusting motor; 52, adjusting screw; 53, adjusting seat; 54, adjusting block; 6, clamping assembly; 61, lifting belt; 62, clamping seat; 621, insertion hole; 622, ring groove; 63, ring-shaped expansion sleeve; 631, ring-shaped cavity; 632, guide pipe; 633, control valve; 7, main lifting beam; 71, main lifting lug; 72, upper traction ring seat; 721, upper winch; 73, lower traction ring seat; 731, lower winch; 8, outer traction rope; 81, outer lifting lug; 82, outer traction seat; 9, inner traction rope; 91, inner lifting lug. DETAILED DESCRIPTION

[0034] The following will be described in detail in combination with the accompanying drawings Figures 1-4 The present application is further described in detail.

[0035] The present application discloses a telescopic blade lifting beam. Referring to Figures 1 to 4 , including a main lifting beam 7, the main lifting beam 7 is provided with a main lifting lug 71 at the top, and support beams 1 are welded on both sides of the main lifting beam 7. Telescopic beams 2 are slidably arranged on the support beams 1, and telescopic assemblies 3 are arranged between the telescopic beams 2 and the support beams 1, which are used to drive the telescopic beams 2 and the support beams 1 to slide relative to each other. A lifting seat 4 is slidably arranged on the telescopic beam 2, and an adjusting assembly 5 is arranged between the lifting seat 4 and the telescopic beam 2, which is used to drive the lifting seat 4 and the telescopic beam 2 to slide relative to each other. The clamping assembly 6 is arranged at the bottom of the lifting seat 4, which is used to connect the blade and the lifting seat 4. According to the position of the lifting point on the blade, on the one hand, the lifting seat 4 is driven to move along the telescopic beam 2 by the adjusting assembly 5, and on the other hand, the telescopic beam 2 is driven to move along the support beam 1 by the telescopic assembly 3, so that the telescopic beam 2 drives the lifting seat 4 to move, thereby driving the clamping assembly 6 to move through the lifting seat 4. When the clamping assembly 6 moves to the position of the lifting point of the blade, the blade is connected with the lifting seat 4 by the clamping assembly 6. Then the lifting device is connected with the main lifting lug 71, and the lifting device lifts the support beam 1 by lifting the main lifting lug 71, thereby achieving the effect of lifting the blade. When lifting blades of different specifications, the lifting seat 4 is adjusted according to the position of the lifting point of the blade, so that the blade lifting device is suitable for blades of various specifications, thereby improving the versatility of the blade lifting device.

[0036] In order to reduce the bending and deformation of the telescopic beam 2 and the support beam 1, referring to Figure 1The main hoisting beam 7 is sleeved with an upper traction ring seat 72 and a lower traction ring seat 73, both of which are welded with the main hoisting beam 7, and the upper traction ring seat 72 is located between the lower traction ring seat 73 and the main lifting lug 71. A group of upper winches 721 are symmetrically installed on the upper traction ring seat 72, and the outer traction rope 8 is wound on the upper winch 721. One end of the outer traction rope 8 is fixedly connected with the upper winch 721. The outer traction seats 82 are welded on the opposite surfaces of the telescopic beam 2, and the outer lifting lugs 81 are welded on the top of the outer traction seats 82. One end of one of the outer traction ropes 8 away from the upper winch 721 is bolted with one of the outer lifting lugs 81, and one end of the other outer traction rope 8 away from the upper winch 721 is bolted with the other outer lifting lug 81. A group of lower winches 731 are symmetrically installed on the lower traction ring seat 73, and the inner traction rope 9 is wound on the lower winch 731. One end of the inner traction rope 9 is fixedly connected with the lower winch 731. The inner lifting lugs 91 are welded on the top of the lifting seat 4. One end of one of the inner traction ropes 9 away from the lower winch 731 is bolted with one of the inner lifting lugs 91, and one end of the other inner traction rope 9 away from the lower winch 731 is bolted with the other inner lifting lug 91. When the telescopic beam 2 is away from the main hoisting beam 7, the upper winch 721 pays out the outer traction rope 8, and when the telescopic beam 2 is close to the main hoisting beam 7, the upper winch 721 winds up the outer traction rope 8, so that the outer traction rope 8 is always kept in tension. When the lifting seat 4 is away from the main hoisting beam 7, the lower winch 731 pays out the inner traction rope 9, and when the lifting seat 4 is close to the main hoisting beam 7, the lower winch 731 winds up the inner traction rope 9, so that the inner traction rope 9 is always kept in tension. The outer traction rope 8 pulls and lifts the telescopic beam 2, and the inner traction rope 9 pulls and lifts the lifting seat 4, thereby reducing the bending and deformation of the telescopic beam 2 and the support beam 1.

[0037] In order to make the telescopic beam 2 and the support beam 1 move relative to each other, with reference to Figure 1 and Figure 2The opposite faces of the telescopic beam 2 are provided with through grooves 21, and the opposite ends of the support beam 1 are inserted into the through grooves 21. The telescopic assembly 3 comprises a piston cylinder 31 and a limiting block 32. The opposite faces of the support beam 1 are provided with driving grooves 311, and the piston cylinder 31 is installed in the driving grooves 311. The output shaft of the piston cylinder 31 is welded to the inner wall of the through groove 21. The outer wall of the support beam 1 is provided with a limiting groove 321, and the limiting block 32 is slidingly arranged in the limiting groove 321. The limiting block 32 is welded to the outer wall of the telescopic beam 2. The side walls of the support beam 1 are welded with guide rails 11, and guide wheels 12 are rollingly arranged in the guide rails 11 and rotationally connected to the inner wall of the through groove 21. The output shaft of the piston cylinder 31 moves to drive the telescopic beam 2 and the support beam 1 to move relative to each other. When the telescopic beam 2 and the support beam 1 move relative to each other, the telescopic beam 2 drives the limiting block 32 to move in the limiting groove 321, and the limiting block 32 limits the position of the telescopic beam 2 to reduce the accidental sliding of the telescopic beam 2. When the telescopic beam 2 and the support beam 1 move relative to each other, the telescopic beam 2 drives the guide wheel 12 to roll in the guide rail 11 to reduce the friction between the telescopic beam 2 and the support beam 1, thereby facilitating the relative movement of the telescopic beam 2 and the support beam 1.

[0038] In order to make the lifting seat 4 move relative to the telescopic beam 2, referring to Figure 1 and Figure 3 , a through hole 41 is formed through the lifting seat 4, and the telescopic beam 2 is inserted into the through hole 41. The top of the telescopic beam 2 is provided with a sliding rail 22, and a plurality of pulleys 23 are rollingly arranged in the sliding rail 22 and rotationally connected to the inner wall of the through hole 41. The adjusting assembly 5 comprises an adjusting motor 51, an adjusting screw 52, an adjusting seat 53 and an adjusting block 54. The adjusting motor 51 and the adjusting seat 53 are both installed at the bottom of the telescopic beam 2. The output shaft of the adjusting motor 51 is welded to one end of the adjusting screw 52, and the other end of the adjusting screw 52 is rotationally connected to the adjusting seat 53. The adjusting block 54 is welded in the through hole 41 and is threadedly connected to the adjusting screw 52. The adjusting motor 51 is started to drive the adjusting screw 52 to rotate, the rotation of the adjusting screw 52 drives the adjusting block 54 to move, and the movement of the adjusting block 54 drives the lifting seat 4 to move. The movement of the lifting seat 4 drives the pulleys 23 to roll in the sliding rail 22 to reduce the friction between the lifting seat 4 and the telescopic beam 2, thereby facilitating the relative movement of the lifting seat 4 and the telescopic beam 2.

[0039] In order to connect the lifting seat 4 with the blade, referring to Figure 1 and Figure 4The clamping assembly 6 comprises a sling 61, a clamping seat 62 and a ring-shaped expansion sleeve 63. The top end of the sling 61 is bolted to the bottom of the lifting seat 4, the bottom end of the sling 61 is bolted to the top of the clamping seat 62, a through hole 621 is formed in the clamping seat 62, a ring groove 622 is formed in the inner wall of the through hole 621, and the ring-shaped expansion sleeve 63 is installed in the ring groove 622. The ring-shaped expansion sleeve 63 is internally provided with a ring-shaped cavity 631 for storing hydraulic medium. A conduit 632 is installed on the ring-shaped expansion sleeve 63, a control valve 633 is installed on the conduit 632, and one end of the conduit 632 is in communication with the ring-shaped cavity 631. The vane is inserted into the ring-shaped expansion sleeve 63 through the through hole 621, so that the ring-shaped expansion sleeve 63 is sleeved on the vane. Then, the end of the conduit 632 away from the ring-shaped cavity 631 is communicated with the hydraulic medium source, and then the control valve 633 is opened, so that the hydraulic medium is injected into the ring-shaped cavity 631. As the hydraulic medium in the ring-shaped cavity 631 increases, the ring-shaped expansion sleeve 63 gradually expands. When the ring-shaped expansion sleeve 63 expands to clamp the vane, the control valve 633 is closed, and the conduit 632 is separated from the hydraulic medium, thereby achieving the effect of connecting the vane with the lifting seat 4.

[0040] The implementation principle of the telescopic vane lifting beam is as follows: according to the position of the lifting point on the vane, on the one hand, the adjusting motor 51 is used to drive the lifting seat 4 to move along the telescopic beam 2, and on the other hand, the piston cylinder 31 is used to drive the telescopic beam 2 to move along the support beam 1, so that the telescopic beam 2 drives the lifting seat 4 to move, thereby driving the clamping seat 62 to move through the lifting seat 4. When the clamping seat 62 moves to the position of the lifting point of the vane, the vane is inserted into the ring-shaped expansion sleeve 63 through the through hole 621, so that the ring-shaped expansion sleeve 63 is sleeved on the vane. Then, the end of the conduit 632 away from the ring-shaped cavity 631 is communicated with the hydraulic medium source, and then the control valve 633 is opened, so that the hydraulic medium is injected into the ring-shaped cavity 631. As the hydraulic medium in the ring-shaped cavity 631 increases, the ring-shaped expansion sleeve 63 gradually expands. When the ring-shaped expansion sleeve 63 expands to clamp the vane, the control valve 633 is closed, and the conduit 632 is separated from the hydraulic medium, thereby achieving the effect of connecting the vane with the lifting seat 4. Then, the hoisting device is bolted to the main lifting lug 71, and the hoisting device hoists the support beam 1 by lifting the main lifting lug 71, thereby achieving the effect of hoisting the vane. When lifting vanes of different specifications, the lifting seat 4 is adjusted according to the position of the lifting point of the vane, so that the vane lifting device is suitable for vanes of multiple specifications, thereby improving the versatility of the vane lifting device.

[0041] The above are preferred embodiments of the present application, but do not limit the protection scope of the present application, therefore: any equivalent changes made on the basis of the structure, shape, principle of the present application should be covered within the protection scope of the present application.

Claims

1. A retractable blade suspension beam, comprising a set of support beams (1), the support beams (1) being fixedly connected to opposite surfaces, characterized in that: Telescopic beams (2) are slidably arranged on the support beam (1). A telescopic component (3) is arranged between the telescopic beam (2) and the support beam (1). The telescopic component (3) is used to drive the telescopic beam (2) and the support beam (1) to slide relative to each other. A lifting seat (4) is slidably arranged on the telescopic beam (2). An adjustment component (5) is arranged between the lifting seat (4) and the telescopic beam (2). The adjustment component (5) is used to drive the lifting seat (4) and the telescopic beam (2) to slide relative to each other. A clamping component (6) is arranged at the bottom of the lifting seat (4). The clamping component (6) is used to connect the blade to the lifting seat (4).

2. The retractable blade lifting beam according to claim 1, characterized in that: A main lifting beam (7) is provided between the support beams (1). The opposite surfaces of the support beams (1) are fixedly connected to the main lifting beam (7). A main lifting lug (71) is fixedly provided on the top of the main lifting beam (7). An upper traction ring seat (72) and a lower traction ring seat (73) are fitted on the main lifting beam (7). Both the upper traction ring seat (72) and the lower traction ring seat (73) are fixedly connected to the main lifting beam (7). The upper traction ring seat (72) is located between the lower traction ring seat (73) and the main lifting lug (71). An outer traction rope (8) is provided between the telescopic beam (2) and the upper traction ring seat (72). An inner traction rope (9) is provided between the lifting seat (4) and the lower traction ring seat (73).

3. The retractable blade lifting beam according to claim 2, characterized in that: An external traction seat (82) is fixedly installed on the opposite side of the telescopic beam (2). An external lifting lug (81) is fixedly installed on the top of the external traction seat (82). A set of upper winches (721) is fixedly installed on the upper traction ring seat (72). The external traction rope (8) is wound around the upper winch (721). One end of the external traction rope (8) is fixedly connected to the upper winch (721), and the other end of the external traction rope (8) is bolted to the external lifting lug (81).

4. The retractable blade lifting beam according to claim 2, characterized in that: The lifting seat (4) is fixedly provided with an inner lifting lug (91) at the top. A set of lower winches (731) is fixedly provided on the lower traction ring seat (73). The inner traction rope (9) is wound around the lower winch (731). One end of the inner traction rope (9) is fixedly connected to the lower winch (731), and the other end of the inner traction rope (9) is bolted to the inner lifting lug (91).

5. A retractable blade lifting beam according to claim 1, characterized in that: The telescopic beam (2) has through slots (21) on its opposite surfaces. The opposite ends of the support beam (1) are inserted into the through slots (21). The side walls of the support beam (1) are fixedly provided with guide rails (11). The guide wheels (12) are rolled inside the guide rails (11). The guide wheels (12) are rotatably connected to the inner wall of the through slots (21).

6. A retractable blade lifting beam according to claim 5, characterized in that: The telescopic assembly (3) includes a piston cylinder (31) and a limiting block (32). The support beam (1) has a drive groove (311) on both sides. The piston cylinder (31) is fixedly installed in the drive groove (311). The output shaft of the piston cylinder (31) is fixedly connected to the inner wall of the through groove (21). The outer wall of the support beam (1) has a limiting groove (321). The limiting block (32) is slidably installed in the limiting groove (321). The limiting block (32) is fixedly connected to the outer wall of the telescopic beam (2).

7. A retractable blade lifting beam according to claim 1, characterized in that: A through hole (41) is opened through the lifting seat (4), and the telescopic beam (2) is inserted into the through hole (41). A slide rail (22) is fixedly installed on the top of the telescopic beam (2), and several pulleys (23) are rolled inside the slide rail (22). The pulleys (23) are rotatably connected to the inner wall of the through hole (41).

8. A retractable blade lifting beam according to claim 7, characterized in that: The adjustment assembly (5) includes an adjustment motor (51), an adjustment screw (52), an adjustment seat (53), and an adjustment block (54). The adjustment motor (51) and the adjustment seat (53) are both fixedly installed at the bottom of the telescopic beam (2). The output shaft of the adjustment motor (51) is fixedly connected to one end of the adjustment screw (52), and the other end of the adjustment screw (52) is rotatably connected to the adjustment seat (53). The adjustment block (54) is fixedly installed in the through hole (41), and the adjustment block (54) is threadedly connected to the adjustment screw (52).

9. A retractable blade lifting beam according to claim 1, characterized in that: The clamping assembly (6) includes a sling (61), a clamping seat (62), and an annular expansion sleeve (63). The top end of the sling (61) is fixedly connected to the bottom of the lifting seat (4), and the bottom end of the sling (61) is fixedly connected to the top of the clamping seat (62). The clamping seat (62) has a through hole (621) and an annular groove (622) on the inner wall of the through hole (621). The annular expansion sleeve (63) is fixedly disposed in the annular groove (622). An annular chamber (631) is disposed inside the annular expansion sleeve (63). The annular chamber (631) is used to store hydraulic medium. A conduit (632) is fixedly disposed on the annular expansion sleeve (63). A control valve (633) is disposed on the conduit (632). One end of the conduit (632) is connected to the annular chamber (631).

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