A hoisting device for a grid support

Abstract

The present invention discloses a hoisting device for a grid support, including a hoisting frame, a hanging beam, a grid support clamp, a fixed counterweight, an adjustable counterweight and an adjusting device. The grid support clamp is connected to the front end of the hanging beam, the fixed counterweight and the adjustable counterweight are connected to the rear end of the hanging beam, and the adjusting device adjusts the adjustable counterweight to move forward and backward. In the hoisting device for the grid support, the front end of the hanging beam fixes the grid support through the grid support clamp, and the rear end of the hanging beam is provided with a fixed counterweight and an adjustable counterweight for balancing the hanging beam. When the grid support is loaded, the position of the adjustable counterweight is adjusted by the adjusting device, and the grid support is slowly pushed to the required position in the cylinder after the load balance is established. When the grid support is released, the adjustable counterweight is adjusted to move forward to a suitable position, and the hanging beam can be slowly withdrawn after the no-load balance state is established, which can avoid instantaneous changes in the counterweight and improve the hoisting safety. This invention is used in the field of steam generator assembly technology.

Description

Technical Field

[0001] The invention relates to the technical field of steam generator assembly, in particular to a hoisting device for a grid support. Background Art

[0002] The straight section of the steam generator heat exchange tube is supported and fixed by a grid support. The grid support is composed of grid bars that are self-locking and assembled. The grid bars form diamond holes. The outer ring is clamped and fixed by a circular support ring. The heat exchange tube passes through the diamond hole to achieve fixation. Multiple grid supports are arranged in sequence and installed in the cylinder. Figure 1 ,9 grid supports are installed in the cylinder. The grid supports are heavy, and the weight of a single grid support can reach 2 tons.

[0003] The grid support is hoisted and pushed into the cylinder. Currently, a cantilever beam hoisting tooling is mainly used. A fixed counterweight is used at the rear end of the tooling, and the front end is connected to the grid support. After the grid support is pushed to a predetermined position in the cylinder, the grid support is released, the counterweight is reduced at the rear end, and then the cylinder is withdrawn. For the 9 grid supports at different positions, the counterweight is increased when pushing forward and reduced when withdrawing, requiring a total of 18 different counterweights. The use of the above tooling has the following problems: the counterweight is not universal, and specific counterweights need to be prepared for cylinders and grid supports of different specifications and sizes; when the tooling is withdrawn, the counterweight needs to be reduced, and the instantaneous change of the counterweight can easily lead to transient instability, posing certain safety risks in operation; the front end of the tooling is connected to the grid support, and it is easy to shake during the hoisting and pushing process, posing safety risks. Summary of the invention

[0004] The purpose of the present invention is to solve at least one of the technical problems existing in the prior art and to provide a hoisting device for a grid support member, which can improve the hoisting safety.

[0005] According to an embodiment of the present invention, there is provided a hoisting device for a grid support member, comprising:

[0006] Lifting frame;

[0007] A hanging beam fixedly connected to the bottom end of the hanging frame;

[0008] A grid support clamp, used for clamping the grid support, connected to the front end of the suspension beam;

[0009] A fixed counterweight and an adjustable counterweight connected to the rear end of the suspension beam; and

[0010] An adjusting device is used to adjust the forward and backward movement of the adjustable counterweight.

[0011] According to the lifting device of the grid support member described in the embodiment of the present invention, the adjustable counterweight is slidably connected to the lifting beam, the adjustment device includes a screw rod, a left bearing seat and a right bearing seat for fixing the screw rod, and a power device for driving the screw rod to rotate, the screw rod passes through the adjustable counterweight, and the adjustable counterweight cooperates with the screw rod in transmission.

[0012] According to the hoisting device for the grid support member described in the embodiment of the present invention, the power device includes a sprocket and a chain, the sprocket is connected to the screw rod, and the chain is connected to the sprocket.

[0013] According to the hoisting device of the grid support member described in the embodiment of the present invention, the grid support clamp includes a cross body, and the cross body includes vertical support rods and transverse support rods. The vertical support rods connect the upper and lower ends of the grid support member, and the transverse support rods press against the left and right ends of the grid support member.

[0014] According to the hoisting device for the grid support member described in the embodiment of the present invention, support plates are provided on both sides of the upper ends of the vertical support rods, and the upper end surfaces of the support plates are arc-shaped.

[0015] According to the hoisting device for the grid support member described in the embodiment of the present invention, ear plates are provided on both sides of the upper end of the vertical support rod, and the ear plates are provided with a pull rod assembly connected to the grid support member.

[0016] According to the lifting device of the grid support member described in the embodiment of the present invention, the pull rod assembly includes a first bolt, a first nut and a diamond block, the ear plate is provided with a through slot hole, the first bolt passes through the slot hole, the first nut cooperates with the first bolt, and the diamond block is fixedly connected to the end of the first bolt.

[0017] According to the lifting device of the grid support member described in the embodiment of the present invention, the lower end of the vertical support rod is provided with two clamping plates arranged opposite to each other, and the clamping plate is provided with a tightening assembly, and the tightening assembly includes a second bolt, a second nut and a top block, the second bolt passes through the clamping plate, the second bolt is threadedly connected to the clamping plate, the second nut cooperates with the second bolt, and the top block is fixedly connected to the end of the second bolt.

[0018] According to the hoisting device for the grid support member described in the embodiment of the present invention, the tightening assemblies are provided at both ends of the transverse support rod.

[0019] According to the hoisting device of the grid support member described in the embodiment of the present invention, a connecting portion connected to the hanging beam is provided in the middle of the vertical support rod, and the transverse support rod is fixed at a position of one quarter of the length of the vertical support rod.

[0020] Beneficial effects: The front end of the hanging beam of this grid support is fixed with the grid support by the grid support clamp, and the rear end of the hanging beam is provided with a fixed counterweight and an adjustable counterweight for balancing the hanging beam. When the grid support is loaded, the position of the adjustable counterweight is adjusted by the adjusting device, and the grid support is slowly pushed to the required position in the cylinder after the load balance is established. When the grid support is loosened, the front end of the hanging beam is unloaded, and the adjustable counterweight is adjusted to move forward to a suitable position. After the hanging beam establishes an unloaded balanced state, it can be slowly withdrawn. Compared with traditional lifting tools, it can avoid instantaneous changes in counterweights, avoid transient instability of the hanging beam, and improve lifting safety. And by adjusting the position of the adjustable counterweight, it can adapt to the needs of different counterweights. Moving the adjustable counterweight backward is equivalent to increasing the counterweight, and moving it forward is equivalent to reducing the counterweight, which can be suitable for the lifting and advancement of different grid supports. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention will be further described below in conjunction with the accompanying drawings:

[0022] Figure 1 is a schematic diagram of the structure in which the grid support member of an embodiment of the present invention is installed in a cylinder;

[0023] Figure 2 is a schematic structural diagram of a hoisting device for a grid support member according to an embodiment of the present invention;

[0024] Figure 3 is a schematic structural diagram of a grid support clamp according to an embodiment of the present invention;

[0025] Figure 4 is a front view of a grid support clamp according to an embodiment of the present invention;

[0026] Figure 5 is a top view of a grid support clamp according to an embodiment of the present invention;

[0027] Figure 6 2 is a schematic structural diagram of a tightening assembly according to an embodiment of the present invention;

[0028] Figure 7 is a schematic structural diagram of a tie rod assembly according to an embodiment of the present invention;

[0029] Figure 8 yes Figure 7 Cross-sectional view of the AA section;

[0030] Figure numerals: lifting frame 10, lifting beam 20, grid support clamp 30, vertical support rod 31, transverse support rod 32, connecting part 33, support plate 34, ear plate 35, slot 351, pull rod assembly 36, first bolt 361, first nut 362, diamond block 363, clamping plate 37, tightening assembly 38, second bolt 381, second nut 382, ​​top block 383, fixed counterweight 40, adjustable counterweight 50, adjusting device 60, screw 61, left bearing seat 62, right bearing seat 63, grid support 70, support ring 71, grid bar 72, support bar 73, cylinder 80. DETAILED DESCRIPTION

[0031] This section will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present invention, but it cannot be understood as a limitation on the scope of protection of the present invention.

[0032] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0033] In the description of the present invention, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood as not including the number itself, and "above", "below", "within" etc. are understood as including the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0034] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0035] Reference Figure 2The hoisting device of the grid support member of the embodiment of the present invention is mainly used to hoist the grid support member 70 into the cylinder 80, and includes a lifting frame 10, a hanging beam 20, a grid support clamp 30, a fixed counterweight 40, an adjustable counterweight 50 and an adjusting device 60. The hanging beam 20 is fixedly connected to the bottom end of the lifting frame 10, the grid support clamp 30 is used to clamp the grid support member 70, the grid support clamp 30 is connected to the front end of the hanging beam 20, the fixed counterweight 40 and the adjustable counterweight 50 are connected to the rear end of the hanging beam 20, and the adjusting device 60 adjusts the adjustable counterweight 50 to move forward and backward.

[0036] The hoisting device of the grid support is connected to the crane through the lifting frame 10, the front end of the hanging beam 20 fixes the grid support 70 through the grid support clamp 30, and the rear end of the hanging beam 20 is provided with a fixed counterweight 40 and an adjustable counterweight 50 for balancing the hanging beam 20. When the grid support 70 is loaded, the position of the adjustable counterweight 50 is adjusted by the adjusting device 60, and the grid support is slowly pushed to the required position in the cylinder 80 after the load balance is established. When the grid support is released, the front end of the hanging beam 20 is unloaded, and the adjustable counterweight 50 is adjusted to move forward to a suitable position. After the hanging beam 20 establishes an unloaded balanced state, it can be slowly withdrawn. Compared with the traditional hoisting tooling, it can avoid instantaneous changes in counterweight, avoid transient instability of the hanging beam 20, and improve hoisting safety. In addition, by adjusting the position of the adjustable counterweight 50, it can adapt to the needs of different counterweights. The backward movement of the adjustable counterweight 50 is equivalent to increasing the counterweight, and the forward movement is equivalent to reducing the counterweight, which can be suitable for the hoisting and advancement of different grid support members 70.

[0037] In some embodiments, the adjustable counterweight 50 is slidably connected to the suspension beam 20, and a wheeled structure can be adopted, and a pulley is installed on the adjustable counterweight 50, so that it can move along the suspension beam 20, or a slide rail can be adopted, and the adjustable counterweight 50 can move along the slide rail. The adjusting device 60 includes a screw rod 61, a left bearing seat 62 and a right bearing seat 63 for fixing the screw rod 61, and a power device for driving the screw rod 61 to rotate. The screw rod 61 passes through the adjustable counterweight 50, and the adjustable counterweight 50 cooperates with the screw rod 61 in transmission. The screw rod 61 rotates, driving the adjustable counterweight 50 to move forward and backward, so that the position of the adjustable counterweight 50 on the suspension beam 20 can be accurately adjusted.

[0038] Specifically, the power device includes a sprocket and a chain, the sprocket is connected to the screw rod 61, and the chain is connected to the sprocket. The chain can be a manual chain, and the sprocket and the screw rod 61 are driven by hand. It is understandable that the power device can also be driven by a motor, the motor is connected to a reducer, and the reducer is connected to the screw rod 61.

[0039] Reference Figure 3 to Figure 5The grid support clamp 30 includes a cross body, which includes a vertical support rod 31 and a horizontal support rod 32. The vertical support rod 31 connects the upper and lower ends of the grid support member 70, and the horizontal support rod 32 presses the left and right ends of the grid support member 70. The cross body acts on the four positions of the upper, lower, left and right of the grid support member 70, effectively preventing the grid support frame from shaking during the lifting and advancement process, thereby improving the safety of the lifting.

[0040] A connecting portion 33 connected to the front end of the hanging beam 20 is provided in the middle of the vertical support rod 31, and the transverse support rod 32 is fixed at a quarter of the length of the vertical support rod 31. The connecting portion 33 is provided with a plurality of mounting holes, and the grid support clamp 30 is mounted on the front end of the hanging beam 20 through the connecting portion 33 connected to the front end of the hanging beam 20.

[0041] The grid support member 70 includes an outer support ring 71 and grid bars 72 which are staggered and connected to form diamond-shaped holes in the support ring 71. A support bar 73 arranged along the diameter direction is provided on the support ring 71.

[0042] In this embodiment, support plates 34 are provided on both sides of the upper end of the vertical support rod 31, and the upper end surface of the support plate 34 is arc-shaped and contacts the inner wall surface of the support ring 71 of the grid support member 70, and is used to support the entire grid support member 70. The vertical gravity of the grid support member 70 is fully transferred to the support plate 34. Ear plates 35 are provided on both sides of the upper end of the vertical support rod 31, and the support plate 34 is fixedly connected to the back of the ear plates 35.

[0043] Furthermore, a pull rod assembly 36 connected to the grid support member 70 is provided on the ear plate 35. The grid support member 70 is tightened by the pull rod assembly 36 so that the grid support member 70 and the grid support clamp 30 are closely attached.

[0044] Reference Figure 7 and Figure 8 Specifically, the pull rod assembly 36 includes a first bolt 361, a first nut 362 and a diamond block 363. The ear plate 35 is provided with a through slot 351. The first bolt 361 passes through the slot 351. The first nut 362 cooperates with the first bolt 361. The diamond block 363 is fixedly connected to the end of the first bolt 361. The diamond block 363 is in a diamond shape. The diamond block 363 is aligned with a diamond hole on the grid support 70. After the first bolt 361 and the diamond block 363 pass through the diamond hole, they are rotated 90° so that the diamond block 363 and the diamond hole are staggered. Then, the first nut 362 is locked on the ear plate 35, and the grid support 70 is tightened to limit the grid support 70 from tipping forward and backward. The diamond block 363 can be a diamond nut, which is threadedly connected to the first bolt 361. When dismantling, the diamond block 363 can be rotated 90° to withdraw from the diamond hole. Quick locking and unlocking can be achieved through the pull rod assembly 36.

[0045] The vertical support rod 31 is made of channel steel and covers the support bar 73 of the grid support member 70 .

[0046] In some embodiments, the lower end of the vertical support rod 31 is provided with two clamping plates 37 arranged opposite to each other, and the clamping plates 37 are provided with a tightening assembly 38, Figure 6 The clamping assembly 38 includes a second bolt 381, a second nut 382 and a top block 383. The second bolt 381 passes through the clamping plate 37, the second bolt 381 is threadedly connected to the clamping plate 37, the second nut 382 cooperates with the second bolt 381, and the top block 383 is fixedly connected to the end of the second bolt 381. The second bolt 381 is screwed so that the two top blocks 383 clamp the support bar 73 of the grid support member 70, and then the second nut 382 is locked to prevent the second bolt 381 from loosening, thereby fixing the lower end of the grid support member 70. The top block 383 and the second bolt 381 can be threadedly connected.

[0047] Furthermore, a plurality of slots 351 may be provided at the lower end of the vertical support rod 31 , and the pull rod assembly 36 may be disposed through the slots 351 to improve the stability of fixing the lower end of the grid support member 70 .

[0048] In this embodiment, the two ends of the transverse support rod 32 are also provided with a tightening assembly 38. The tightening assemblies 38 at both ends of the transverse support rod 32 are used to tighten the left and right ends of the grid support member 70, limit the left and right shaking of the grid support member 70, improve the stability of the lifting and propulsion, and further improve the safety.

[0049] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the knowledge scope of ordinary technicians in the technical field without departing from the purpose of the present invention.

Claims

1. A hoisting device for a grid support, characterized in that: include: Lifting frame; A hanging beam fixedly connected to the bottom end of the hanging frame; A grid support clamp is used to clamp the grid support member and is connected to the front end of the suspension beam. The grid support clamp includes a cross body, and the cross body includes a vertical support rod and a transverse support rod. The vertical support rod connects the upper and lower ends of the grid support member, and the transverse support rod presses the left and right ends of the grid support member. Support plates are provided on both sides of the upper end of the vertical support rod, and the upper end surface of the support plate is arc-shaped. Ear plates are provided on both sides of the upper end of the vertical support rod, and a pull rod assembly connected to the grid support member is provided on the ear plate. The pull rod assembly includes a first bolt, a first nut and a diamond block. A through slot is provided on the ear plate, and the first bolt passes through the slot, and the first nut cooperates with the first bolt, and the diamond block is fixedly connected to the end of the first bolt. The lower end of the vertical support rod is provided with two clamping plates arranged opposite to each other, the clamping plates are provided with a tightening assembly, the tightening assembly includes a second bolt, a second nut and a top block, the second bolt passes through the clamping plate, the second bolt is threadedly connected to the clamping plate, the second nut cooperates with the second bolt, the top block is fixedly connected to the end of the second bolt, the grid support member includes an outer support ring and grid bars staggered and connected to form diamond holes in the support ring, the support ring is provided with a support bar arranged in a diameter direction, and the two top blocks clamp the support bar of the grid support member; A fixed counterweight and an adjustable counterweight connected to the rear end of the suspension beam; and An adjusting device is used to adjust the forward and backward movement of the adjustable counterweight.

2. The grating support member hoisting device according to claim 1, characterized in that: The adjustable counterweight is slidably connected to the suspension beam, and the adjusting device includes a screw rod, a left bearing seat and a right bearing seat for fixing the screw rod, and a power device for driving the screw rod to rotate. The screw rod passes through the adjustable counterweight, and the adjustable counterweight cooperates with the screw rod in transmission.

3. The grating support member hoisting device according to claim 2, characterized in that: The power device comprises a sprocket and a chain, wherein the sprocket is connected to the screw rod, and the chain is connected to the sprocket.

4. The lattice support member hoisting device according to claim 1 or 2, characterized in that: The tightening components are provided at both ends of the transverse support rod.

5. The lattice support member hoisting device according to claim 1 or 2, characterized in that: A connecting portion connected to the suspension beam is provided in the middle of the vertical support rod, and the transverse support rod is fixed at a position of one quarter of the length of the vertical support rod.

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