An earring device for integrally hoisting a cooling tower fan cover

Abstract

The present invention discloses a lifting ear device for integrally hoisting a cooling tower fan cover, which is arranged on a cooling tower fan cover main body. The lifting ear device includes multiple groups of lifting ear main bodies arranged on the circumference of the outer wall of the cooling tower fan cover main body, the lifting ear main bodies are provided with lifting ear connectors, the cooling tower fan cover main body is provided with mounting bolts connected to the lifting ear connectors, and the adjacent lifting ear connectors of the multiple groups of lifting ear connectors, except for the head and tail lifting ear connectors, are connected by a drive pull rope. The rotation of the lifting ear connector at the head end drives the other lifting ear connectors to rotate synchronously in the same direction through the drive pull rope. This technical solution provides a lifting ear connector on the lifting ear main body, and by rotating a driving hand wheel and cooperating with the drive pull rope, multiple groups of lifting ear connectors are rotated synchronously in the same direction and connected to the mounting bolts, thereby realizing rapid installation of multiple lifting ear main bodies and the cooling tower fan cover main body, greatly improving the hoisting efficiency while reducing the labor intensity.

Description

Technical Field

[0001] The invention relates to the technical field of hoisting accessories, in particular to a lifting ear device for integrally hoisting a fan cover of a cooling tower. Background Art

[0002] A cooling tower fan shroud is a protective structure used for heat dissipation, exhaust, and ventilation of the fan. Currently, there are two common methods for hoisting large cooling tower fan shrouds to a designated area for installation: one is to hoist multiple fan blades sequentially to the installation location and then assemble them as a whole; the other is to assemble multiple fan blades on the ground and then hoist them into place at once. The first method is inefficient for single-piece hoisting, and assembly after hoisting is difficult and challenging, and tolerance adjustments cannot be made in advance. Therefore, the second method is often used. With the second method, after the cooling tower fan shroud is assembled, multiple lifting lugs are typically installed on the outer wall of the cooling tower fan shroud via a bolt structure. These lifting lugs are then connected to the cooling tower fan shroud using external hoisting equipment to lift and install the cooling tower fan shroud. To secure the lifting lugs to the cooling tower fan shroud via the bolt structure, workers often need to tighten the nuts of the bolt structure one by one with the aid of tools, which is time-consuming, labor-intensive, and very cumbersome to install. Summary of the Invention

[0003] The object of the present invention is to provide a lifting lug device for integrally lifting a cooling tower fan cover, so as to solve the problems raised in the above-mentioned background technology.

[0004] To achieve the above object, the present invention provides the following technical solutions:

[0005] A lifting ear device for integrally lifting a cooling tower fan cover is provided on the cooling tower fan cover main body, the lifting ear device comprising a plurality of lifting ear main bodies provided on the circumference of the outer wall of the cooling tower fan cover main body, the lifting ear main bodies being provided with lifting holes, the lifting ear main bodies being provided with lifting ear connectors, the cooling tower fan cover main body being provided with mounting bolts connected to the lifting ear connectors, the plurality of sets of lifting ear connectors except the head and tail lifting ear connectors being connected to each other through a drive pull rope, the head end lifting ear connector being provided with a drive hand wheel, the drive hand wheel being used to drive the head end lifting ear connector to rotate, the rotation of the head end lifting ear connector drives the remaining lifting ear connectors to rotate synchronously in the same direction through the drive pull rope, and the rotation of the lifting ear connector is used to be connected to the mounting bolts.

[0006] A further improvement is that the lifting lug connector includes a connecting tube, a torsion spring, a movable tube, a nut, a limiting convex ring and a threaded sleeve;

[0007] The cam is fixedly mounted on the support frame of the lifting lug, and the cam is fixedly mounted on the support frame of the lifting lug, wherein the cam is fixedly mounted on the support frame of the lifting lug, and the cam is fixedly mounted on the support frame of the lifting lug.

[0008] A further improvement is that the lifting lug connector further comprises: a washer and an elastic telescopic rod;

[0009] The washer is rotatably arranged in the connecting tube and connected to the outer wall of the lifting ear body. The elastic telescopic rods are provided in multiple groups, and the multiple groups of elastic telescopic rods are arranged in a circular array on the inner wall of the washer. A ball is embedded in one end of the elastic telescopic rod facing the mounting bolt, and an arc-shaped groove for the ball to be inserted into the axial outer wall of the mounting bolt is opened.

[0010] A further improvement is that two groups of lifting ear connectors are provided on the lifting ear main body, the connecting tubes in the two groups of lifting ear connectors are connected by transmission members, and the follower rings in the two groups of lifting ear connectors are connected by connecting blocks.

[0011] A further improvement is that it further includes a locking mechanism, which includes: a mounting seat, a clamping block, a connecting spring, a contact rod, a driving block and a pull rope driving member;

[0012] The mounting seat is arranged on the outer wall of the lifting ear body, and a through opening for the card block to slide is provided on the mounting seat, and the card block is slidably arranged in the through opening, and the circumferential outer wall of the connecting cylinder is provided with multiple groups of card slots for the card block to be inserted, one end of the connecting spring is connected to the card block, and the other end is connected to the inner wall of one side of the through opening, one end of the contact rod is connected to the card block, and the other end extends to the inner cavity of the mounting seat through the through opening, and the inner cavity of the mounting seat is slidably provided with a driving block that drives the contact rod to move toward the connecting cylinder, and the driving block is trapezoidal, and the pull rope driving member is connected to the driving block, which is used to drive the driving block to move along the length direction of the mounting seat.

[0013] A further improvement is that the pull rope drive member includes a connecting pull rope, a second return spring, a second drive pull rope and a winding roller;

[0014] The adjacent drive blocks except the head and tail drive blocks in the multiple groups of drive blocks are connected by connecting ropes. One end of the second reset spring is connected to the drive block, and the other end is connected to the inner wall of the mounting seat, which is used to drive the drive block to reset. One end of the second drive rope is connected to the drive block at the head end away from the end of the connecting rope, and the other end movably passes through the mounting seat at the head end and is wound around the outer wall of the winding roller. The winding roller is rotatably arranged on the supporting seat, and the supporting seat is installed on the side wall of the mounting seat at the head end.

[0015] A further improvement is that a rotating hand wheel is provided at the end of the winding roller, a bolt member is inserted into the rotating hand wheel, and bolt holes for inserting the bolt members are opened in a circular array on the outer wall of the bearing seat.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] This technical solution provides a lifting ear connector on the lifting ear body. After the lifting ear body corresponds to the mounting bolts on the cooling tower fan cover body through the lifting ear connector, multiple sets of lifting ear connectors are synchronously rotated in the same direction and connected with the mounting bolts by rotating the driving hand wheel and cooperating with the driving pull rope, thereby realizing rapid installation of multiple lifting ear bodies and the cooling tower fan cover body, without the need to manually tighten the nuts in the bolt structure one by one with the help of tools, thereby greatly improving the lifting efficiency and reducing the labor intensity. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the present invention;

[0019] Figure 2 This is a schematic diagram of the structural coordination of multiple sets of lifting ear connectors of the present invention;

[0020] Figure 3 For the present invention Figure 1 A magnified view of the structure in the middle;

[0021] Figure 4 For the present invention Figure 3 Schematic diagram of the local structure;

[0022] Figure 5 This is a cross-sectional view of the structure of the lifting ear connector in the present invention;

[0023] Figure 6 It is a schematic diagram of the partial structure of the locking mechanism in the present invention.

[0024] In the figure: 1. Lifting ear body; 101. Mounting bolt; 2. Cooling tower fan cover body; 3. Lifting hole; 4. Lifting ear connector; 41. Connecting cylinder; 42. Torsion spring; 43. Movable cylinder; 44. Nut; 45. Limiting cam; 46. Threaded sleeve; 47. Washer; 48. Elastic telescopic rod; 49. Gear set; 5. Transmission member; 6. Drive rope 1; 7. Follower ring; 8. Locking mechanism; 81. Mounting seat; 82. Block; 83. Connecting spring; 84. Contact rod; 85. Drive block; 86. Connecting rope; 87. Return spring 2; 88. Drive rope 2; 89. Bearing seat; 810. Winding roller; 811. Bolt member; 9. Connecting block. DETAILED DESCRIPTION

[0025] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0026] Example 1

[0027] Please see the attached Figure 1-2 , a lifting ear device for integrally lifting a cooling tower fan cover, provided on a cooling tower fan cover body 2, the cooling tower fan cover body 2 belongs to the prior art and is assembled from a plurality of fan blades;

[0028] The lifting ear device includes a plurality of lifting ear bodies 1 arranged on the circumferential direction of the outer wall of the cooling tower fan cover main body 2. The lifting ear body 1 is specifically installed on the upper part of the outer wall of the cooling tower fan cover main body 2. The lifting ear body 1 is made of Q235B material. A lifting hole 3 is opened on the lifting ear body 1 to connect with the sling on the external lifting equipment, so as to lift the cooling tower fan cover main body 2 by the external lifting equipment; a lifting ear connector 4 is provided on the lifting ear body 1, and a mounting bolt 101 connected to the lifting ear connector 4 is provided on the cooling tower fan cover main body 2. It should be noted that the bolt hole on the cooling tower fan cover main body 2 through which the mounting bolt 101 passes is owned by the fan cover itself, and no additional drilling is required. After the mounting bolt 101 is passed through the cooling tower fan cover main body 2, the lifting ear connector 4 is installed at the position of the outer wall of the cooling tower fan cover main body 2 corresponding to the mounting bolt 101;

[0029] The adjacent lifting eye connectors 4 except the first and last lifting eye connectors 4 in the plurality of lifting eye connectors 4 are connected by a driving rope 6. Figure 2It can be seen that, for example, there are four groups of lifting ear connectors 4, namely a, b, c, and d, wherein a and d are the head end lifting ear connector 4 and the tail end lifting ear connector 4, respectively; a driving rope 6 between a and b has one end wound around the outer wall of b and the other end connected to a; a driving rope 6 between b and c has one end wound around the outer wall of c and the other end connected to b, and so on. In this way, when a is rotated, the four groups of lifting ear connectors 4, namely a, b, c, and d, can rotate synchronously in the same direction;

[0030] A driving handwheel (not shown in the figure) is provided on the head end lifting ear connector 4, which is used to drive the head end lifting ear connector 4 to rotate. The rotation of the head end lifting ear connector 4 drives the remaining lifting ear connectors 4 (including the tail end lifting ear connector 4) to rotate synchronously in the same direction through the driving rope 6. The rotation of the lifting ear connector 4 is used to connect with the mounting bolt 101.

[0031] Please see the attached Figure 3-5 Preferably, the lifting ear connector 4 of this embodiment includes a connecting tube 41, a torsion spring 42, a movable tube 43, a nut 44, a limiting protruding ring 45 and a threaded sleeve 46; the driving hand wheel is specifically sleeved on the outer wall of the connecting tube 41 of the head end lifting ear connector 4, that is, the connecting tube 41 of the head end lifting ear connector 4 is rotated;

[0032] One end of the connecting tube 41 is rotatably mounted on the outer wall of the lifting ear body 1 via a bearing. A through hole for inserting a mounting bolt 101 is provided on the lifting ear body 1. The through hole, the mounting bolt 101, and the connecting tube 41 are coaxial. When the lifting ear body 1 is installed, the mounting bolt 101 on the cooling tower fan cover body 2 passes through the through hole on the lifting ear body 1 and enters the connecting tube 41.

[0033] A torsion spring 42 is provided at the connection between the connecting tube 41 and the lifting lug body 1. The torsion spring 42 is used to drive the rotating connecting tube 41 to reset. When the lifting lug body 1 needs to be removed later, the driving rope 6 can be loosened, and the connecting tube 41 can be reset and rotated under the action of the torsion spring 42.

[0034] The movable cylinder 43 is slidably inserted into the other end of the connecting cylinder 41. The movable cylinder 43 and the connecting cylinder 41 are slidably connected in a sliding manner using a slider and a sliding groove, so that the movable cylinder 43 can rotate with the connecting cylinder 41 and can move relative to the connecting cylinder 41 along the axis of the connecting cylinder 41.

[0035] A nut 44 is provided in the movable cylinder 43 and engages with the mounting bolt 101. A limiting protrusion 45 is provided in the movable cylinder 43 and on both sides of the nut 44 to limit the axial movement of the nut 44 along the movable cylinder 43. When the connecting cylinder 41 is rotated by the driving rope 6, the nut 44 is driven to rotate relative to the mounting bolt 101. The nut 44 and the mounting bolt 101 are threadedly engaged, so that the nut 44 moves on the mounting bolt 101. During the movement, the nut 44 drives the movable cylinder 43 into the connecting cylinder 41.

[0036] One end of the drive rope 6 between two adjacent sets of lifting lug connectors 4 is wound around the outer wall of the connecting tube 41 in one lifting lug connector 4, and the other end is connected to the outer wall of the connecting tube 41 in the other lifting lug connector 4. With this arrangement, rotating the driving handwheel to drive the connecting tube 41 in the first lifting lug connector 4 can drive the remaining connecting tubes 41 to rotate synchronously in the same direction, so that the nut 44 is screwed into the mounting bolt 101 to fix the lifting lug body 1 and the cooling tower fan cover body 2 together;

[0037] The outer end of the movable cylinder 43 is provided with a follower ring 7 through a bearing rotation sleeve. A stud is provided on the side of the follower ring 7 facing the lifting ear body 1. One end of the threaded sleeve 46 is movably connected to the outer wall of the lifting ear body 1, and the other end is threadedly sleeved on the outer wall of the stud. The threaded sleeve 46 and the connecting cylinder 41 are connected by a gear set 49. The follower ring 7 is not affected by the rotation of the movable cylinder 43, but can drive the movable cylinder 43 to move relative to the connecting cylinder 41. The gear set 49 is two sets of meshing gears. When the connecting cylinder 41 rotates, the gear set 49 drives the movable cylinder 43 to move relative to the connecting cylinder 41. The threaded sleeve 46 is moved, and the threaded sleeve 46 drives the stud to drive the movable cylinder 43 to move, so that the nut 44 moves toward the lifting ear body 1 while rotating with the movable cylinder 43, so that the nut 44 is screwed into the outer wall of the mounting bolt 101. Similarly, when the connecting cylinder 41 is reset and rotated under the action of the torsion spring 42, the threaded sleeve 46 drives the stud to drive the movable cylinder 43 to move, so that the nut 44 moves away from the lifting ear body 1 while rotating with the movable cylinder 43, so that the nut 44 is screwed out of the outer wall of the mounting bolt 101.

[0038] Preferably, the ear connector 4 of this embodiment further includes: a washer 47 and an elastic telescopic rod 48;

[0039] The washer 47 is rotatably arranged in the connecting tube 41 through a bearing and is connected to the outer wall of the lifting ear body 1. The inner diameter of the washer 47 is larger than the diameter of the mounting bolt 101, so that the mounting bolt 101 can pass through the washer 47. There are multiple groups of elastic telescopic rods 48, and the multiple groups of elastic telescopic rods 48 are arranged in a circular array on the inner wall of the washer 47. A ball is embedded in the end of the elastic telescopic rod 48 facing the mounting bolt 101, and an arc-shaped groove for the ball to be inserted is opened on the axial outer wall of the mounting bolt 101. Through this arrangement, when installing the lifting ear body 1, the mounting bolt 101 passes through the through hole on the lifting ear body 1, and then passes through the washer 47 into the connecting tube 41 and corresponds to the nut 44. When the mounting bolt 101 corresponds to the nut 44, the ball corresponds to the arc groove. Under the action of the elastic telescopic rod 48, the ball is stuck in the arc groove to provide a certain fixing force for the mounting bolt 101, so that the connecting tube 41 will not drive the mounting bolt 101 to rotate when rotating, so that the nut 44 can be stably screwed in or out of the outer wall of the mounting bolt 101.

[0040] Preferably, the lifting eye body 1 of this embodiment is provided with two sets of lifting eye connectors 4, and the connecting cylinders 41 in the two sets of lifting eye connectors 4 are connected by a transmission member 5. The transmission member 5 is, for example, a chain and a sprocket, so that the two sets of lifting eye connectors 4 (connecting cylinders 41) on one lifting eye body 1 rotate synchronously in the same direction, and the follower rings 7 in the two sets of lifting eye connectors 4 are connected by a connecting block 9. When one follower ring 7 drives the movable cylinder 43 to move, the follower ring 7 of the other lifting eye connector 4 on the same lifting eye body 1 is driven to move by the connecting block 9.

[0041] Please see the attached Figure 3-6 As a preference, this embodiment further includes a locking mechanism 8, which includes: a mounting seat 81, a clamping block 82, a connecting spring 83, a contact rod 84, a driving block 85, and a pull rope driving member; It should be noted that if there are two sets of lifting ear connectors 4 on a lifting ear body 1, the locking mechanism 8 can be arranged between the two sets of lifting ear connectors 4;

[0042] The mounting seat 81 is provided on the outer wall of the lifting ear body 1, and a through opening for the sliding of the card block 82 is provided on the mounting seat 81, and the card block 82 is slidably provided in the through opening. The circumferential outer wall of the connecting tube 41 is provided with multiple groups of card slots for the insertion of the card block 82. The card block 82 is inserted into the card slot of the outer wall of the connecting tube 41. When the driving rope 6 is loosened, the connecting tube 41 will not be reset under the action of the torsion spring 42, thereby ensuring the stability of the connection between the lifting ear body 1 and the cooling tower fan cover body 2.

[0043] One end of a connecting spring 83 is connected to the block 82, and the other end is connected to the inner wall of one side of the opening. One end of a contact rod 84 is connected to the block 82, and the other end extends through the opening into the inner cavity of the mounting seat 81. A driving block 85 is slidably disposed within the inner cavity of the mounting seat 81, which drives the contact rod 84 toward the connecting tube 41. The driving block 85 is trapezoidal in shape, and a pull rope drive member is connected to the driving block 85, which is used to drive the driving block 85 along the length of the mounting seat 81. Through this arrangement, the driving block 85 drives the contact rod 84, which in turn drives the block 82 toward the outer wall of the connecting tube 41, causing the block 82 to engage with a corresponding groove on the outer wall of the connecting tube 41.

[0044] Preferably, the rope driving member of this embodiment includes a connecting rope 86, a second return spring 87, a second driving rope 88 and a winding roller 810;

[0045] The remaining adjacent drive blocks 85 in the multiple groups of drive blocks 85 except the head and tail drive blocks 85 are connected by connecting ropes 86, which is similar to the driving method of the above-mentioned ear connector 4. One end of the reset spring 87 is connected to the drive block 85, and the other end is connected to the inner wall of the mounting seat 81, which is used to drive the drive block 85 to reset. One end of the drive rope 88 is connected to the drive block 85 at the head end away from the end of the connecting rope 86, and the other end movably passes through the mounting seat 81 at the head end and is wound around the outer wall of the winding roller 810. The winding roller 810 is rotatably arranged on the supporting seat 89, and the supporting seat 89 is installed on the side wall of the head end mounting seat 81. Through this arrangement, when it is necessary to rotate the connecting tube 41 in the head-end lifting ear connector 4, the driving rope 2 88 is unwound by rotating the winding roller 810. Under the action of the reset spring 2 87, the driving block 85 in the mounting seat 81 is reset and moved, so that the blocking block 82 is disengaged from the slot on the outer wall of the connecting tube 41 under the action of the connecting spring 83. After the lifting ear connector 4 is connected to the mounting bolt 101, the winding roller 810 is rotated to rewind the driving rope 2 88. The driving rope 2 88 pulls the head-end driving block 85 to move in the mounting seat 81. At the same time, the remaining driving blocks 85 are driven by the connecting rope 86 to move synchronously to push the blocking block 82 toward the connecting tube 41, so that the blocking block 82 enters the slot, restricting the rotation of the connecting tube 41 and ensuring that the lifting ear body 1 is stably installed on the cooling tower fan cover body 2.

[0046] Preferably, a rotating handwheel is provided at the end of the winding roller 810 of this embodiment. Bolts 811 are inserted into the rotating handwheel, and bolt holes for the bolts 811 are formed in a circular array on the outer wall of the support seat 89. To rotate the winding roller 810, the bolts 811 are first removed. After rotating the winding roller 810, the bolts 811 are then inserted into the corresponding bolt holes to secure the rotating handwheel. This prevents the winding roller 810 from rotating and rewinding the drive rope 88.

[0047] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A lifting lug device for integrally lifting a cooling tower fan cover, provided on a cooling tower fan cover body (2), the lifting lug device comprising a plurality of lifting lug bodies (1) provided on the circumference of the outer wall of the cooling tower fan cover body (2), the lifting lug bodies (1) being provided with lifting holes (3), characterized in that: The lifting lug body (1) is provided with a lifting lug connector (4), the cooling tower fan cover body (2) is provided with a mounting bolt (101) connected to the lifting lug connector (4), and the adjacent lifting lug connectors (4) except the head and tail lifting lug connectors (4) in the plurality of groups of the lifting lug connectors (4) are connected by a driving pull rope (6), and the lifting lug connector (4) at the head end is provided with a driving hand wheel, and the driving hand wheel is used to drive the lifting lug connector (4) at the head end to rotate, and the rotation of the lifting lug connector (4) at the head end drives the other lifting lug connectors (4) to rotate synchronously in the same direction through the driving pull rope (6), and the rotation of the lifting lug connector (4) is used to connect with the mounting bolt (101); The lifting lug connector (4) comprises a connecting tube (41), a torsion spring (42), a movable tube (43), a nut (44), a limiting convex ring (45) and a threaded sleeve (46); One end of the connecting tube (41) is rotatably mounted on the outer wall of the lifting ear body (1), and a through hole for inserting a mounting bolt (101) is provided on the lifting ear body (1), and the through hole, the mounting bolt (101) and the connecting tube (41) are coaxial, and the torsion spring (42) is provided at the connection between the connecting tube (41) and the lifting ear body (1), and the movable tube (43) is slidably inserted into the other end of the connecting tube (41), and a nut (44) that cooperates with the mounting bolt (101) is provided in the movable tube (43), and a limiting convex ring (45) is provided in the movable tube (43) and at positions on both sides of the nut (44) for limiting the nut (44) ) moves axially along the movable cylinder (43), one end of a driving rope (6) between two adjacent groups of the ear connectors (4) is wound around the outer wall of the connecting cylinder (41) in one ear connector (4), and the other end is connected to the outer wall of the connecting cylinder (41) in the other ear connector (4), the outer end of the movable cylinder (43) is rotatably sleeved with a follower ring (7), the follower ring (7) is provided with a stud on the side facing the ear body (1), one end of the threaded sleeve (46) is rotatably connected to the outer wall of the ear body (1), and the other end is threadedly sleeved on the outer wall of the stud, and the threaded sleeve (46) and the connecting cylinder (41) are connected by a gear set (49).

2. The lifting lug device for integrally lifting a cooling tower fan cover according to claim 1, characterized in that: The lifting lug connector (4) further includes: a washer (47) and an elastic telescopic rod (48); The washer (47) is rotatably arranged in the connecting tube (41) and is connected to the outer wall of the ear body (1). The elastic telescopic rods (48) are provided in multiple groups. The multiple groups of elastic telescopic rods (48) are arranged in a ring array on the inner wall of the washer (47). A ball is embedded in one end of the elastic telescopic rod (48) facing the mounting bolt (101), and an arc-shaped groove for the ball to be inserted into the axial outer wall of the mounting bolt (101).

3. The lifting lug device for integrally lifting a cooling tower fan cover according to claim 2, characterized in that: Two groups of lifting lug connectors (4) are provided on the lifting lug main body (1), the connecting tubes (41) in the two groups of lifting lug connectors (4) are connected by transmission means (5), and the follower rings (7) in the two groups of lifting lug connectors (4) are connected by a connection block (9).

4. The lifting lug device for integrally lifting a cooling tower fan cover according to claim 2, characterized in that: The locking mechanism (8) further comprises: a mounting seat (81), a clamping block (82), a connecting spring (83), a contact rod (84), a driving block (85), and a pull rope driving member; The mounting seat (81) is provided on the outer wall of the ear body (1); a through opening for the sliding of the card block (82) is provided on the mounting seat (81); the card block (82) is slidably provided in the through opening; a plurality of card slots for the insertion of the card block (82) are provided on the circumferential outer wall of the connecting cylinder (41); one end of the connecting spring (83) is connected to the card block (82) and the other end is connected to the inner wall of one side of the through opening; one end of the contact rod (84) is connected to the card block (82) and the other end extends to the inner cavity of the mounting seat (81) through the through opening; a driving block (85) for driving the contact rod (84) to move toward the connecting cylinder (41) is slidably provided in the inner cavity of the mounting seat (81); the driving block (85) is trapezoidal; the pull rope driving member is connected to the driving block (85) and is used to drive the driving block (85) to move along the length direction of the mounting seat (81).

5. The lifting lug device for integrally lifting a cooling tower fan cover according to claim 4, characterized in that: The pull rope drive member includes a connecting pull rope (86), a second return spring (87), a second drive pull rope (88), and a winding roller (810); The adjacent drive blocks (85) except the head and tail drive blocks (85) in the plurality of groups of the drive blocks (85) are connected by a connecting rope (86); one end of the second reset spring (87) is connected to the drive block (85), and the other end is connected to the inner wall of the mounting seat (81), for driving the drive block (85) to reset; one end of the second drive rope (88) is connected to the drive block (85) at the head end away from the end of the connecting rope (86), and the other end movably passes through the mounting seat (81) at the head end and is wound around the outer wall of the winding roller (810); the winding roller (810) is rotatably arranged on the supporting seat (89), and the supporting seat (89) is installed on the side wall of the mounting seat (81) at the head end.

6. The lifting lug device for integrally lifting a cooling tower fan cover according to claim 5, characterized in that: A rotating hand wheel is provided at the end of the winding roller (810), a bolt member (811) is inserted into the rotating hand wheel, and bolt holes for inserting the bolt members (811) are provided in a circular array on the outer wall of the bearing seat (89).

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