Tower crane anti-vibration device

Abstract

The invention relates to the field of petroleum machinery, and discloses a tower crane anti-vibration device which comprises a swing arm frame, the swing arm frame is used for being connected with a tower crane, and a center ring is fixedly connected to the middle of the swing arm frame; the balancing weight is used for balancing the whole tower crane, two clamping grooves are formed in one side of the balancing weight, and the balancing weight slides on the outer side wall of the limiting support through the clamping grooves; the front side wall of the bearing back plate is fixedly connected with a bearing bottom plate, and the bearing back plate and the bearing bottom plate are used for placing a balancing weight. Four sets of devices are installed at the bottom of a tower crane, when strong wind comes, balancing weights of the devices move in the opposite direction, so that the shaking degree of a building is reduced, meanwhile, the number of first clamping blocks can be properly increased or decreased according to the load of an oil pumping unit, and the working efficiency is improved. Therefore, the phenomena that a guide wheel is easy to wear, vibration is large, a foundation sinks, a machine body inclines and shakes, a weight box grinds a machine frame, and the whole machine, a beam hanger and a wellhead device shakes violently due to strong wind are reduced.

Description

Technical Field

[0001] This invention relates to the field of petroleum machinery technology, specifically to a shock-absorbing device for tower cranes. Background Technology

[0002] The tower adopts a truss structure, with four uprights made of 140*6 square steel pipes and cross braces made of 80*8 angle steel. The center of gravity of the entire machine is inside the frame. A platform is set at the top of the tower for installing various equipment. The lower part is the base, which is a welded structure of channel steel and plate. The bottom is welded to the platform frame. Because the tower machine adopts a truss structure and is over 12 meters high, important equipment such as the power mechanism and transmission mechanism are all located at the top of the tower. The center of gravity is high, and it is severely affected by crosswind vibration, which has a significant impact on the overall structural strength and safe operation of the equipment. Summary of the Invention

[0003] To address the shortcomings of existing technologies, this invention provides a shock-absorbing device for tower cranes, which solves the problem of safety risks associated with the operation of tower cranes due to the significant impact of wind.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a tower crane anti-vibration device, comprising a swing arm frame for connecting with the tower crane, wherein a central ring is fixedly connected to the middle of the swing arm frame; The counterweight is used to balance the entire tower crane. Two locking grooves are provided on one side of the counterweight, and the counterweight slides on the outer wall of the limiting bracket through the locking grooves. A load-bearing back plate, the front side wall of which is fixedly connected to a load-bearing bottom plate, the load-bearing back plate and the load-bearing bottom plate are used to mount counterweights; The limiting brackets are connected end to end to the swing arm and the bearing base plate in sequence. The limiting brackets are used to limit the counterweight.

[0005] Preferably, the limiting bracket has a straight row of side holes on both sides, a force-bearing membrane is fixedly connected to the center of the side holes, an expansion layer is provided in the middle of the force-bearing membrane, two air chambers are provided inside the force-bearing membrane, the air chambers are distributed on the left and right sides of the expansion layer, pressure columns are provided on both sides of the force-bearing membrane, the pressure columns are slidably connected inside the side holes, and the opposite side of the pressure column is arc-shaped.

[0006] Preferably, symmetrical return rings are slidably connected inside the side hole, and each return ring is fixedly connected with a ball bearing. A return spring is provided between the return ring and the pressure column. One end of the return spring is fixedly connected to the opposite side of the return ring, and the other end of the return spring is fixedly connected to the arc-shaped surface of the pressure column.

[0007] Preferably, each of the counterweights has two symmetrical annular sleeves on its inner side, and each annular sleeve is rotatably connected to a ball bearing, which is engaged in the side holes on both sides of the limiting bracket.

[0008] Preferably, the top of the bearing back plate has a recessed hole, and a fixing ring is fixedly connected to the top of the bearing back plate. The fixing ring is located at the top of the recessed hole. A connecting plate is provided on the top of the bearing back plate, and a sliding rod is provided between the connecting plate and the bearing back plate. One end of the sliding rod is fixedly connected to the bottom of the connecting plate, and the other end of the sliding rod slides in the recessed hole.

[0009] Preferably, a second fixing ring is fixedly connected to the bottom of the connecting plate, a first return spring is sleeved on the outer wall of the slide rod, one end of the first return spring is fixedly connected to the bottom of the second fixing ring, the outer wall of the first return spring is provided with a rubber layer, the other end of the second fixing ring is fixedly connected to the upper surface of the first fixing ring, and the slide rod passes through the first fixing ring and extends into the interior of the bearing back plate.

[0010] Preferably, a bearing ring is fixedly connected to the top of the connecting plate, and a locking post is fixedly connected to the inner ring of the bearing ring. A locking groove is provided in the middle of the locking post.

[0011] Preferably, the top of the connecting plate is provided with a card plate, and the bottom wall of the card plate is fixedly connected with a card block four. The card plate is engaged in the card slot three on the card post one through the card block four. The connecting plate and the rear side wall of the card plate are provided with card holes. Two semi-circular grooves are opened on one side of the card plate. The card block three is provided on one side of the card plate. The card post two is fixedly connected to one side of the card block three. The card block three is engaged in the card plate and the rear side wall of the connecting plate through the card post two.

[0012] Preferably, a second slot is provided at the top center of the bearing base plate, and a first slot is provided on both sides of the upper surface of the bearing base plate.

[0013] Preferably, a baffle is provided on the top of the supporting base plate, a second locking block is fixedly connected to the center of the lower surface of the baffle, a first locking block is fixedly connected to both sides of the bottom of the baffle, and multiple ventilation grids are provided inside the baffle.

[0014] Working principle: When using this device, the operator measures the wind force and speed at the time, calculates the data, and then assembles multiple counterweights. During installation, remove the baffle and simultaneously remove the third locking block. Pull the plate backward, at which point the fourth locking block at the bottom of the plate slides out of the third locking slot at the top of the first locking post. At this point, the groove on the side of the plate moves away from the limiting bracket, allowing the plate to be dragged and rotated. Rotation occurs around the bearing ring. Then, counterweights are added to the bearing back plate and bearing bottom plate. The counterweights inside the bearing back plate can slide downward along the limiting bracket. During the weight addition process, the first ball bearing inside the annular sleeve on the side of the counterweight rotates. When the first ball bearing moves to the side holes on both sides of the limiting bracket, the second ball bearing initially rolls along the side wall of the limiting bracket. When the second ball bearing is under pressure, it is squeezed inward to the center. At this time, the second return spring is compressed, and the pressure column moves towards the center to squeeze. The pressure column squeezes to the force-bearing membrane. The force-bearing membrane has an air chamber inside, and the expansion layer can provide partial rebound protection. At the same time, it works in conjunction with the rebound force of the second return spring to slide to the side of the limiting bracket. The second rebound ball can be inserted into the side hole, and the curved edge allows it to lock as it descends to the bottom due to gravity. Pull the connecting plate up to the height of the counterweight, then rotate the locking plate back to its original position and reset the fourth locking block into the third locking slot. Because the connecting plate is pulled, the slide rod slides within the bearing back plate, and the first return spring is stretched. When it moves to the corresponding position, release the connecting plate, and the first return spring will rebound and press down the counterweight. Then, lock the third locking block onto the side of the locking plate and the connecting plate to complete the fixation. Finally, lock the bottom of the baffle. Block 2 and Block 1 are inserted into Slot 1 and Slot 2 for protection. A ventilation grid is provided on one side of the baffle to allow airflow and reduce resistance. The whole unit can be installed around the bottom of the tower machine. When strong winds occur, the counterweight blocks of the device move in the opposite direction, thereby reducing the swaying of the building. At the same time, the number of counterweight blocks can be increased or decreased according to the load of the pumping unit, thereby reducing phenomena such as easy wear of guide wheels, large vibration, foundation settlement, tilting and swaying of the machine body, counterweight box grinding the frame, and severe shaking of the whole machine, suspension rope device and wellhead device caused by strong winds.

[0015] This invention provides a shock-absorbing device for tower cranes. It has the following beneficial effects: This invention, by installing four sets of this device at the bottom of the tower crane, allows the counterweight blocks of the device to move in the opposite direction when strong winds occur, thereby reducing the swaying of the building. At the same time, the number of the counterweight blocks can be increased or decreased according to the load of the pumping unit, thereby reducing phenomena such as easy wear of guide wheels, large vibrations, foundation subsidence, tilting and swaying of the machine body, wear of the counterweight box on the frame, and severe shaking of the whole machine, suspension rope device, and wellhead device caused by strong winds. Attached Figure Description

[0016] Figure 1 This is a perspective view of the present invention; Figure 2 This is a schematic diagram of the limiting bracket of the present invention; Figure 3 This is a schematic diagram of the counterweight structure of the present invention; Figure 4 This is a schematic diagram of the slide bar structure of the present invention; Figure 5 This is a schematic diagram of the connecting plate structure of the present invention; Figure 6 This is a schematic diagram of the cross-sectional structure of the swing arm frame of the present invention; Figure 7 for Figure 5 Enlarged view of point A in the middle; Figure 8 for Figure 6 Enlarged view at point B in the middle; Figure 9 This is a top view of the counterweight block of the present invention.

[0017] The components are as follows: 1. Swing arm; 2. Limiting bracket; 3. Bearing back plate; 4. Engaging groove; 5. Baffle; 6. Clamping plate; 7. Side hole; 8. Bearing base plate; 9. Ventilation grid; 10. Connecting plate; 11. Rubber layer; 12. Counterweight; 13. Clamping block two; 14. Clamping groove one; 15. Clamping groove two; 16. Slide rod; 17. Fixing ring one; 18. Return spring one; 19. Fixing ring two; 20. Clamping block three; 21. Clamping post two; 22. Groove; 23. Clamping hole; 24. Bearing ring; 25. Clamping post one; 26. Clamping groove three; 27. Clamping block four; 28. Center ring; 29. ​​Return ring; 30. Return spring two; 31. Pressure column; 32. Force-bearing membrane; 33. Expansion layer; 34. Annular sleeve; 35. Ball bearing one; 36. Ball bearing two; 37. Clamping block one. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Example

[0019] Please see the appendix Figure 1 - Appendix Figure 3 This invention provides a tower crane anti-vibration device, comprising: The jib 1 is used to connect with the tower crane, and a central ring 28 is fixedly connected to the middle of the jib 1; the counterweight 12 is used to balance the entire tower crane, and two locking grooves 4 are provided on one side of the counterweight 12, through which the counterweight 12 slides on the outer wall of the limiting bracket 2; the bearing back plate 3 is fixedly connected to the front side wall of the bearing back plate 3, and the bearing back plate 3 and the bearing bottom plate 8 are used to place the counterweight 12; the limiting bracket 2 consists of two sets of limiting brackets 2 connected end to end to the jib 1 and the bearing bottom plate 8, and the limiting bracket 2 is used to limit the counterweight 12.

[0020] Please see the appendix Figure 6 Appendix Figure 8 - Appendix Figure 9 Based on the staff's measurement of the wind force and speed at the time, and after calculation based on the data, multiple counterweight blocks 12 were assembled. The entire structure can be installed around the bottom of the tower machine. When strong winds occur, the counterweight blocks 12 move in the opposite direction, thereby reducing the swaying of the structure. At the same time, the number of counterweight blocks 12 can be increased or decreased appropriately according to the pumping unit load, thereby reducing phenomena such as easy wear of guide wheels, large vibrations, foundation subsidence, tilting and swaying of the machine body, counterweight box grinding the frame, and severe shaking of the entire machine, suspension rope device, and wellhead device caused by strong winds.

[0021] The limiting bracket 2 has straight rows of side holes 7 on both sides. A force-bearing membrane 32 is fixedly connected to the center of the side hole 7. An expansion layer 33 is provided in the middle of the force-bearing membrane 32. Two air chambers are provided inside the force-bearing membrane 32, which are distributed on the left and right sides of the expansion layer 33. Pressure columns 31 are provided on both sides of the force-bearing membrane 32. The pressure columns 31 are slidably connected inside the side hole 7. The opposite side of the pressure column 31 is arc-shaped. Symmetrical return rings 29 are slidably connected inside the side hole 7. Ball bearings 36 are fixedly connected inside the return rings 29. A return spring 30 is provided between the return rings 29 and the pressure columns 31. One end of the return spring 30 is fixedly connected to the opposite side of the return ring 29, and the other end of the return spring 30 is fixedly connected to the arc-shaped surface of the pressure column 31.

[0022] During the addition process, the first ball 35 inside the annular sleeve 34 on the side of the locking groove 4 rotates. When the first ball 35 moves to the side holes 7 on both sides of the limiting bracket 2, the initial second ball 36 rolls along the side wall of the limiting bracket 2. When the second ball 36 is under pressure, the second ball 36 is squeezed towards the center. At this time, the second return spring 30 is compressed, and the pressure column 31 moves towards the center to squeeze. The pressure column 31 squeezes to the force-bearing membrane 32. The force-bearing membrane 32 has an air chamber inside, and the expansion layer 33 can serve as part of the rebound protection force. At the same time, with the rebound force of the second return spring 30, the second ball 36 can be rebounded and locked into the side hole 7 when sliding to the side hole 7 on the side of the limiting bracket 2. At the same time, the edge is arc-shaped and can be locked at the bottom due to gravity.

[0023] Please see the appendix Figure 4 - Appendix Figure 7 Two symmetrical annular sleeves 34 are provided on the inner side of the locking groove 4. A ball bearing 35 is rotatably connected inside the annular sleeve 34. The ball bearing 35 is engaged in the side holes 7 on both sides of the limiting bracket 2. A recessed hole is provided at the top of the bearing back plate 3. A fixing ring 17 is fixedly connected to the top of the bearing back plate 3, located at the top of the recessed hole. A connecting plate 10 is provided at the top of the bearing back plate 3. A sliding rod 16 is provided between the connecting plate 10 and the bearing back plate 3. One end of the sliding rod 16 is fixedly connected to the bottom of the connecting plate 10, and the other end slides in the recessed hole. A fixing ring 19 is fixedly connected to the bottom of the connecting plate 10. A return spring 18 is sleeved on the outer wall of the sliding rod 16. One end of the return spring 18 is fixedly connected to the bottom of the fixing ring 19. A rubber layer 11 is provided on the outer wall of the return spring 18. The other end of the fixing ring 19 is fixedly connected to the upper surface of the fixing ring 17. The sliding rod 16 passes through the fixing ring 17 and extends into the interior of the bearing back plate 3, connecting... A bearing ring 24 is fixedly connected to the top of the plate 10. A locking post 25 is fixedly connected to the inner ring of the bearing ring 24. A locking groove 26 is provided in the middle of the locking post 25. A locking plate 6 is provided on the top of the connecting plate 10. A locking block 27 is fixedly connected to the bottom wall of the locking plate 6. The locking plate 6 is engaged in the locking groove 26 on the locking post 25 by the locking block 27. The connecting plate 10 and the rear side wall of the locking plate 6 are provided with locking holes 23. Two semi-circular grooves 22 are provided on one side of the locking plate 6. A locking block is provided on one side of the locking plate 6. The third block 20 has a locking post 21 fixedly connected to one side, and the third block 20 is engaged with the rear side wall of the plate 6 and the connecting plate 10 through the locking post 21; the top center of the bearing base plate 8 has a locking groove 2 15, and both sides of the upper surface of the bearing base plate 8 have a locking groove 1 14. The top of the bearing base plate 8 is provided with a baffle 5, the center of the lower surface of the baffle 5 is fixedly connected with a locking block 2 13, and both sides of the bottom of the baffle 5 are fixedly connected with locking blocks 1 37. Multiple ventilation grids 9 are provided inside the baffle 5.

[0024] During installation, remove the baffle 5 and simultaneously remove the locking block 3 20. Pull the locking plate 6 backward. At this time, the locking block 4 27 at the bottom of the locking plate 6 slides out of the locking groove 3 26 at the top of the locking post 1 25. At this time, the groove 22 on the side of the locking plate 6 is far away. During the addition process, the ball 1 35 in the annular sleeve 34 on the side of the counterweight 4 rotates. When the ball 1 35 moves to the side holes 7 on both sides of the limiting bracket 2, the initial ball 2 36 rolls along the side wall of the limiting bracket 2. The ball 2 36 is subjected to Under pressure, the second ball bearing 36 is squeezed towards the center, at which point the second return spring 30 is compressed, and the pressure column 31 moves towards the center, squeezing until it reaches the force-bearing membrane 32. The force-bearing membrane 32 has an air chamber inside, and the expansion layer 33 provides partial rebound protection. Simultaneously, the rebound force of the second return spring 30 allows the ball bearing 36 to rebound and engage in the side hole 7 on the side of the limiting bracket 2 when it slides to that point. The ball bearing 36, with its curved edge, can descend to the bottom due to gravity. Simultaneously, the locking mechanism is completed, and the limiting bracket 2 is disengaged. The card plate 6 can be dragged and rotated. At this time, the rotation can occur around the bearing ring 24. Then, a counterweight block 12 is added to the bearing back plate 3 and the bearing bottom plate 8. The engaging groove 4 on the inner side of the counterweight block 12 can be used to add weight downwards along the limiting bracket 2. When the weight addition is complete, the connecting plate 10 is pulled up to the height of the counterweight block 12. Then, the card plate 6 is rotated back to its original position, and the card block 4 27 is reset into the card slot 3 26 and locked. Because the connecting plate 10 is pulled, Thus, the slide bar 16 slides within the bearing back plate 3, and the return spring 18 is stretched under force. When it moves to the corresponding position, the connecting plate 10 is released, and the return spring 18 rebounds to press down the counterweight 12. Then, the locking block 20 is locked onto the side of the locking plate 6 and the connecting plate 10 to complete the fixation. Finally, the locking block 2 13 and locking block 37 at the bottom of the baffle 5 are locked into the locking slot 14 and locking slot 2 15 for protection. A ventilation grille 9 is provided on one side of the baffle 5 to allow air to circulate and reduce resistance.

[0025] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A shock-absorbing device for tower cranes, characterized in that, include: A swing arm (1) is used to connect with the tower crane, and a central ring (28) is fixedly connected in the middle of the swing arm (1). Counterweight (12) is used to balance the entire tower crane. Two locking grooves (4) are provided on one side of the counterweight (12). The counterweight (12) slides on the outer wall of the limiting bracket (2) through the locking grooves (4). The back plate (3) is a bearing back plate (3), and the front side wall of the back plate (3) is fixedly connected to the bearing bottom plate (8). The back plate (3) and the bearing bottom plate (8) are used to place the counterweight (12). Limiting brackets (2), the two sets of limiting brackets (2) are connected to the swing arm frame (1) and the bearing base plate (8) in sequence from end to end. The limiting brackets (2) are used to limit the counterweight (12).

2. The tower crane anti-vibration device according to claim 1, characterized in that, The limiting bracket (2) has straight rows of side holes (7) on both sides. A force-bearing membrane (32) is fixedly connected to the center of the side hole (7). An expansion layer (33) is provided in the middle of the force-bearing membrane (32). Two air chambers are provided inside the force-bearing membrane (32). The air chambers are distributed on the left and right sides of the expansion layer (33). Pressure columns (31) are provided on both sides of the force-bearing membrane (32). The pressure columns (31) are slidably connected inside the side holes (7). The opposite side of the pressure column (31) is arc-shaped.

3. The tower crane anti-vibration device according to claim 2, characterized in that, The side hole (7) is slidably connected to a left and right symmetrical return ring (29). Each return ring (29) is fixedly connected to a ball bearing (36). A return spring (30) is provided between the return ring (29) and the pressure column (31). One end of the return spring (30) is fixedly connected to the opposite side of the return ring (29), and the other end of the return spring (30) is fixedly connected to the arc surface of the pressure column (31).

4. The tower crane anti-vibration device according to claim 1, characterized in that, The counterweight (4) has two symmetrical ring sleeves (34) on its inner side. The ring sleeves (34) are rotatably connected to ball bearings (35), which are engaged in the side holes (7) on both sides of the limiting bracket (2).

5. The tower crane anti-vibration device according to claim 1, characterized in that, The top of the bearing back plate (3) has a recessed hole, and a fixing ring (17) is fixedly connected to the top of the bearing back plate (3). The fixing ring (17) is located at the top of the recessed hole. A connecting plate (10) is provided on the top of the bearing back plate (3). A sliding rod (16) is provided between the connecting plate (10) and the bearing back plate (3). One end of the sliding rod (16) is fixedly connected to the bottom of the connecting plate (10), and the other end of the sliding rod (16) slides in the recessed hole.

6. The tower crane anti-vibration device according to claim 5, characterized in that, The bottom of the connecting plate (10) is fixedly connected to a second fixing ring (19). The outer wall of the slide rod (16) is fitted with a first return spring (18). One end of the first return spring (18) is fixedly connected to the bottom of the second fixing ring (19). The outer wall of the first return spring (18) is provided with a rubber layer (11). The other end of the second fixing ring (19) is fixedly connected to the upper surface of the first fixing ring (17). The slide rod (16) passes through the first fixing ring (17) and extends into the interior of the bearing back plate (3).

7. The tower crane anti-vibration device according to claim 5, characterized in that, The top of the connecting plate (10) is fixedly connected to a bearing ring (24), and the inner ring of the bearing ring (24) is fixedly connected to a locking post (25), and a locking groove (26) is opened in the middle of the locking post (25).

8. The tower crane anti-vibration device according to claim 5, characterized in that, The top of the connecting plate (10) is provided with a card plate (6), and the bottom wall of the card plate (6) is fixedly connected with a card block four (27). The card plate (6) is engaged in the card slot three (26) on the card post one (25) through the card block four (27). The connecting plate (10) and the rear side wall of the card plate (6) are provided with card holes (23). Two semi-circular grooves (22) are opened on one side of the card plate (6). The card block three (20) is provided on one side of the card plate (6). The card post two (21) is fixedly connected to one side of the card block three (20). The card block three (20) is engaged in the card plate (6) and the rear side wall of the connecting plate (10) through the card post two (21).

9. A tower crane anti-vibration device according to claim 1, characterized in that, The top center of the bearing base plate (8) is provided with a second slot (15), and the upper surface of the bearing base plate (8) is provided with a first slot (14) on both sides.

10. A tower crane anti-vibration device according to claim 1, characterized in that, The top of the supporting base plate (8) is provided with a baffle (5), and a second locking block (13) is fixedly connected to the center of the lower surface of the baffle (5). A first locking block (37) is fixedly connected to both sides of the bottom of the baffle (5). Multiple ventilation grids (9) are opened inside the baffle (5).

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