Heavy tower crane device for building construction

Abstract

The invention relates to the technical field of building construction, and discloses a heavy tower crane device for building construction, which comprises a base frame, one side of a bearing arm is fixedly connected with a maintenance platform, one end of the bearing arm close to the base frame is rotatably connected with a safety door, and one side of the top of the safety door close to the maintenance platform is fixedly connected with a sleeve. A threaded rod of a hollow structure is slidably connected into the sleeve, sleeve plates corresponding to the wind cups in number are fixedly connected to the bottom of the transmission frame, the ends, away from the transmission frame, of the sleeve plates are sleeved with movable blocks in sliding connection, and the ends, away from the transmission frame, of the movable blocks are rotatably connected with hooks. In the process of opening the safety door, the threaded rod can extend out of the sleeve, and the rotating hook can be hung on the threaded rod at the moment, so that the safety door is limited, a worker cannot open the safety door, and it is ensured that the worker can only conduct overhaul work in a safe environment.

Description

Technical Field

[0001] The invention relates to the technical field of building construction, in particular to a heavy tower crane device for building construction. Background Art

[0002] Building construction refers to the process of building a building. With the development of society, the number of floors of buildings is constantly increasing, which makes it extremely difficult for traditional construction methods to build some tall buildings. In order to cope with the construction of high-rise buildings, tower cranes are used to assist in the work. Tower crane, also known as tower crane, is the most commonly used lifting equipment on construction sites. It can be built according to the height of the building, so that the tower crane can assist in the work of buildings of different heights and complete the lifting and handling of building materials. The boom is installed on the upper part of the towering tower. The rotating crane has a large working space and is mainly used for the vertical and horizontal transportation of materials and the installation of building components in house construction. Since the tower crane basically works outdoors during use, the transmission system on it is prone to problems due to debris or lack of lubricating oil. At this time, the staff needs to go to the boom of the tower crane to inspect the transmission mechanism. Since the tower crane is generally high and there are fewer buildings around the tower crane during use, it is generally in an open area. This causes the wind force on the tower crane to be generally greater than the wind force on the ground. At this time, when the staff go to the boom of the tower crane for maintenance work, even if they are tied with a safety rope, if the wind is too strong, it will still be very dangerous to them. There are fewer people on the tower crane, which makes it easy for a single staff member to misjudge the size of the wind on the tower crane, resulting in the problem of still carrying out maintenance work under strong wind conditions. For this reason, we propose a heavy-duty tower crane device for construction. Summary of the invention

[0003] The object of the present invention is to provide a heavy tower crane device for construction to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: A heavy tower crane device for construction, comprising a base frame, a load-bearing arm is fixedly connected to one side of the top of the base frame, a hoist is slidably connected to the load-bearing arm, a maintenance platform is fixedly connected to one side of the load-bearing arm, a safety door is rotatably connected to one end of the load-bearing arm close to the base frame, a sleeve is fixedly connected to the side of the top of the safety door close to the maintenance platform, a threaded rod with a hollow structure is slidably connected in the sleeve, a bearing is fixedly connected to the top of the sleeve, a threaded sleeve is fixedly connected to the top of the bearing, the bearing and the threaded sleeve are both sleeved on the threaded rod, and the threaded sleeve is threadedly connected to the threaded rod, and the top of the threaded sleeve is fixedly connected to a gear; The end of the load-bearing arm close to the safety door is fixedly connected to a mounting frame, the bottom of the mounting frame is fixedly connected to an arc-shaped rack, and the tooth block of the arc-shaped rack is meshed with the gear; One end of the load-bearing arm close to the safety door is fixedly connected to a load-bearing frame, the top of the load-bearing frame is rotatably connected to a limiting frame, and a plurality of wind cups evenly and annularly distributed are fixedly connected to the limiting frame; The bottom of the load-bearing frame is rotatably connected to the transmission frame, and the top of the transmission frame is fixedly connected to the bottom of the limit frame. The bottom of the transmission frame is fixedly connected to a sleeve plate corresponding to the number of wind cups. The end of the sleeve plate away from the transmission frame is sleeved with a slidingly connected movable block, and the end of the movable block away from the transmission frame is rotatably connected to a hook.

[0005] Preferably, an elastic rope is fixedly connected between the movable block and the inner wall of the sleeve plate, a mounting hole is opened on the side of the movable block close to the hook, a shaft rod is rotatably connected in the mounting hole, the top and bottom ends of the shaft rod are fixedly connected to the hook, and a spring is fixedly connected between the shaft rod and the inner wall of the mounting hole.

[0006] Preferably, a fixing frame is fixedly connected to the bottom of the hook, a knocking frame with a hollow structure is fixedly connected to the bottom end of the fixing frame, and the knocking frame and the hook on the same side are staggered.

[0007] Preferably, the rotating shaft of the safety door is located at a side away from the maintenance platform, and the arc center position of the arc-shaped rack is vertically parallel to the rotating shaft position of the safety door.

[0008] Preferably, a plurality of slide grooves are provided on the inner wall of the sleeve, and sliders are slidably connected in the slide grooves, and the sliders are fixedly docked with the bottom ends of the threaded rods.

[0009] Preferably, a railing A is fixedly connected to the top of the maintenance platform on one side away from the load-bearing arm and on the side close to the base frame, and a railing B is rotatably connected to the side of the maintenance platform close to the hoist.

[0010] Preferably, a load-bearing basket is fixedly connected to one side of the hoist, the load-bearing basket and the maintenance platform are located on the same side of the load-bearing arm, and a ladder is provided on the side of the load-bearing basket close to the maintenance platform.

[0011] Preferably, a fixing rod is fixedly connected to one side of the load-bearing arm close to the maintenance platform, a traction machine is fixedly connected to one end of the load-bearing arm close to the base frame, and the traction machine and the hoist are connected by a traction rope.

[0012] Preferably, a cab is provided on one side of the top of the base frame, a load-bearing platform is fixedly connected to the side of the top of the base frame away from the load-bearing arm, and a plurality of counterweights are provided on one end of the load-bearing platform away from the base frame.

[0013] Preferably, a rotatable bearing platform is provided on the base frame, and the driving cab, the load-bearing platform and the load-bearing arm are all located on the bearing platform of the base frame.

[0014] Compared with the prior art, the present invention has the following beneficial effects: When the wind force on the tower crane is strong, if the staff misjudges the wind force and wants to open the safety door, during the process of opening the safety door, the gear cooperates with the arc-shaped rack to drive the threaded sleeve to rotate, and the threaded rod will extend from the sleeve. At this time, due to the centrifugal force generated by the high-speed rotation of the transmission frame, the movable block will be thrown out of the sleeve for a certain distance, and the rotating hook will be hung on the extended threaded rod at this time, so as to limit the safety door and prevent the staff from opening the safety door, thereby improving the protection of the staff and further ensuring that the staff can only perform maintenance work in a safe environment; The present invention uses a wind cup to measure the wind force. When the wind force is too strong, the rotation speed of the wind cup will increase, thereby driving the transmission frame to rotate. At this time, the centrifugal force generated by the high-speed rotation of the transmission frame will throw the movable block out of the sleeve plate for a certain distance. At this time, the distance between the knocking frame and the threaded rod becomes shorter. The knocking frame will continuously collide with the threaded rod during the rotation process, thereby making a sound to remind the staff and improve the safety of the staff. The present invention adopts the staggered distribution design of the elastic rope and the hook and the knocking frame. When the wind force decreases, the rebound characteristic of the elastic rope can be used to pull the movable block back into the sleeve plate, so that the hook and the knocking frame are away from the threaded rod. At this time, it can be determined whether the safety door can be opened according to the wind force and maintenance work can be carried out. At the same time, the staggered distribution of the hook and the knocking frame can ensure that the hook does not contact the threaded rod when the safety door is not opened, thereby ensuring that the wind cup can rotate continuously. At this time, the knocking frame can knock on the threaded rod to make a sound. In the process of opening the safety door, the threaded rod extends out. At this time, the hook will contact the threaded rod before the knocking frame, thereby limiting the safety door, further improving the auxiliary role of the device for tower crane safety measures. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the load-bearing arm structure of the present invention; Figure 3 This is a schematic diagram of the safety door structure of the present invention; Figure 4 This is a schematic diagram of the arc-shaped rack structure of the present invention; Figure 5 This is a schematic diagram of the wind cup structure of the present invention; Figure 6This is a schematic diagram of the cross-sectional structure of the sleeve plate of the present invention; Figure 7 It is a schematic diagram of the cross-sectional structure of the movable block of the present invention; Figure 8 This is a schematic diagram of the structure of the maintenance platform of the present invention; Fig. 9 For the present invention Figure 3 A schematic diagram of the enlarged structure of area A shown; Fig.10 For the present invention Figure 4 Schematic diagram of the enlarged structure of area B is shown.

[0016] In the figure: 1. base frame; 11. cab; 12. load-bearing platform; 13. counterweight; 2. load-bearing arm; 21. fixing rod; 22. tractor; 3. hoist; 31. load-bearing basket; 32. ladder; 4. maintenance platform; 41. railing A; 42. railing B; 5. safety door; 51. sleeve; 52. threaded rod; 53. bearing; 54. threaded sleeve; 55. gear; 56. slide; 57. slider; 6. mounting frame; 61. arc rack; 7. load-bearing frame; 71. limit frame; 72. wind cup; 8. transmission frame; 81. sleeve; 82. movable block; 83. elastic rope; 84. hook; 85. mounting hole; 86. shaft; 87. spring; 9. fixing frame; 91. striking frame. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0018] See also Figure 1-10 The present invention provides a technical solution: a heavy tower crane device for construction, comprising a base frame 1, which is the main load-bearing structure of the tower crane, and is constructed with steel brackets. A staircase for workers to go up and down is arranged in the base frame 1, and a cab 11 is arranged on one side of the top of the base frame 1. A load-bearing platform 12 is fixedly connected to the side of the top of the base frame 1 away from the load-bearing arm 2, and a plurality of counterweights 13 are arranged on the end of the load-bearing platform 12 away from the base frame 1. Workers can climb onto the base frame 1 through the stairs and enter the cab 11, and control the tower crane through the cab 11. A load-bearing arm 2 is fixedly connected to one side of the top of the base frame 1, and a rotatable bearing platform is arranged on the base frame 1, and the cab 11, the load-bearing platform 12 and the load-bearing arm 2 are all located on the bearing platform of the base frame 1, and the bearing platform has its own driving mechanism, and the driving mechanism can be used to drive the bearing platform to rotate, thereby cooperating with the load-bearing arm 2 to complete the lifting and transportation of objects.

[0019] Furthermore, after entering the cab 11 , the staff can operate the tower crane in the cab 11 to lift and carry objects required for construction.

[0020] Combined with Figure 1 and Figure 2 As shown, the end of the load-bearing arm 2 close to the base frame 1 is fixedly connected with a traction machine 22, which is composed of a motor and two winding rods in different directions. The two winding rods are driven by the motor to rotate in different directions, and the traction machine 22 can be moved back and forth along the load-bearing arm 2 by a traction rope, so as to complete the transportation of the hoisted objects. The load-bearing arm 2 is slidably connected with a hoist 3, and the traction machine 22 and the hoist 3 are connected by a traction rope. The hoist 3 is composed of a driving device, a steel cable and a hook. The height of the hook can be controlled by lowering and raising the steel cable by the driving device. When the hook is lowered, the object can be hung on the hook, and then the driving device is used in conjunction with the steel cable to lift the hook to complete the lifting of the object.

[0021] Furthermore, by cooperating with the tractor 22, the hoist 3 and the carrying platform, the horizontal position and the height position of the hook can be changed, so that the object can be lifted and transported using the hook.

[0022] Combined with Figure 1 , Figure 2 and Figure 8As shown, a maintenance platform 4 is fixedly connected to one side of the load-bearing arm 2. The maintenance platform 4 can provide a safe platform when the traction machine 22 is being repaired, so that the workers can easily repair the traction machine 22. A fixing rod 21 is fixedly connected to the side of the load-bearing arm 2 close to the maintenance platform 4. By setting the fixing rod 21, when the workers go to the maintenance platform 4 to perform related maintenance work, a safety rope can be tied to the fixing rod 21. Since the fixing rod 21 is a smooth metal rod, the safety rope is tied to the fixing rod 21, which can provide safety protection for the workers without affecting their movement. The top of the maintenance platform 4 is fixedly connected to a side away from the load-bearing arm 2 and a side close to the base frame 1 with a railing A41. The side of the maintenance platform 4 close to the hoist 3 is turned It is dynamically connected with a railing B42. When the traction machine 22 is being repaired, the railing A41 and the railing B42 are used to block the edge of the maintenance platform 4 to further improve the safety of the staff when working on the maintenance platform 4. A load-bearing basket 31 is fixedly connected to one side of the crane 3. The load-bearing basket 31 and the maintenance platform 4 are located on the same side of the load-bearing arm 2. Fences are provided on all four sides of the load-bearing basket 31 to improve the protection of the staff. When the staff stands in the load-bearing basket 31, they can repair the crane 3 at a close distance. A ladder 32 is provided on the side of the load-bearing basket 31 close to the maintenance platform 4. When the staff goes to the load-bearing basket 31, the railing B42 can be opened, and then the ladder 32 is followed into the load-bearing basket 31, and then the crane 3 can be repaired.

[0023] Furthermore, when a problem occurs in the operation of the traction machine 22, the staff can go to the maintenance platform 4 and tie the safety rope to the fixed rod 21 before that, and then go to the maintenance platform 4 to perform maintenance work on the traction machine 22. When the hoist 3 needs to be repaired, the hoist 3 is controlled to move to the side of the maintenance platform 4 so that the load-bearing basket 31 is fitted together with the maintenance platform 4, and then go to the maintenance platform 4, and then open the railing B42. At this time, follow the ladder 32 on the load-bearing basket 31 to enter the load-bearing basket 31, and then the hoist 3 can be repaired in the load-bearing basket 31.

[0024] Combined with Figure 2 , Figure 3 , Figure 4 , Fig. 9 and Fig.10As shown, a safety door 5 is rotatably connected to one end of the load-bearing arm 2 close to the base frame 1, and a sleeve 51 is fixedly connected to the side of the top of the safety door 5 close to the maintenance platform 4. A threaded rod 52 with a hollow structure is slidably connected in the sleeve 51. The threaded rod 52 is made of metal, and a bearing 53 is fixedly connected to the top of the sleeve 51. A threaded sleeve 54 is fixedly connected to the top of the bearing 53. The bearing 53 and the threaded sleeve 54 are both sleeved on the threaded rod 52, and the threaded sleeve 54 is threadedly connected to the threaded rod 52. A gear 55 is fixedly connected to the top of the threaded sleeve 54. A plurality of sliding grooves 56 are provided on the inner wall of the sleeve 51, and sliders 57 are slidably connected in the sliding grooves 56. The sliders 57 are fixedly docked with the bottom ends of the threaded rod 52. The sliding grooves 56 cooperate with the sliders 57 to limit the threaded rod 52. At this time, when the threaded sleeve 54 rotates, the threaded rod 52 can be moved along the threaded sleeve. 54 is lifted and lowered, and the lifting direction of the threaded rod 52 is changed by changing the rotation direction of the threaded sleeve 54. The end of the load-bearing arm 2 close to the safety door 5 is fixedly connected to a mounting bracket 6, and the bottom of the mounting bracket 6 is fixedly connected to an arc-shaped rack 61, and the tooth block of the arc-shaped rack 61 is meshed with the gear 55. The rotating shaft of the safety door 5 is located on the side away from the maintenance platform 4, and the arc center position of the arc-shaped rack 61 is vertically parallel to the rotating shaft position of the safety door 5. Since the arc center position of the arc-shaped rack 61 is vertically parallel to the rotating shaft position of the safety door 5, when the safety door 5 is opened, the gear 55 located on the movable side of the safety door 5 can always be in a meshing state with the arc-shaped rack 61 during the process of the safety door 5 being opened. At this time, the fixed arc-shaped rack 61 can drive the gear 55 to rotate, thereby causing the threaded sleeve 54 to rotate, thereby completing the transmission work of the threaded rod 52.

[0025] Furthermore, when the staff pushes open the safety door 5, since the gear 55 and the arc-shaped rack 61 are meshed with each other, the fixed arc-shaped rack 61 will cause the gear 55 to rotate, and the gear 55 will drive the threaded sleeve 54 to rotate. At this time, since the threaded rod 52 is limited by the slide groove 56 and the slider 57, during the rotation of the threaded sleeve 54, the threaded rod 52 can extend from the sleeve 51, and as the angle of the safety door 5 is increased, the extended length becomes longer, until the gear 55 is separated from the arc-shaped rack 61. When closing the safety door 5, the gear 55 will rotate in the opposite direction and drive the threaded sleeve 54 to rotate in the opposite direction. At this time, the threaded rod 52 will shrink toward the sleeve 51 until the safety door 5 is completely closed.

[0026] Combined with Figure 2 , Figure 5 , Figure 6 and Figure 7As shown, one end of the load-bearing arm 2 close to the safety door 5 is fixedly connected to a load-bearing frame 7, and the top of the load-bearing frame 7 is rotatably connected to a limiting frame 71, and a number of wind cups 72 evenly and annularly distributed are fixedly connected to the limiting frame 71. Through the setting of the wind cups 72, the wind cups 72 can be used to measure the wind force at the current height of the tower crane. The greater the wind force, the faster the rotation speed of the wind cups 72 and the limiting frame 71. The bottom of the load-bearing frame 7 is rotatably connected to a transmission frame 8, and the top of the transmission frame 8 is fixedly docked with the bottom end of the limiting frame 71, and the bottom of the transmission frame 8 is fixedly connected with a sleeve plate 81 corresponding to the number of wind cups 72, and the end of the sleeve plate 81 away from the transmission frame 8 is sleeved with a slidingly connected movable block 82, and the end of the movable block 82 away from the transmission frame 8 is rotatably connected with a hook 84. When the wind force is too strong, the speed of the limit frame 71 will become faster, which will drive the transmission frame 8 to rotate quickly. When the wind force exceeds the set threshold, the transmission frame 8 will throw out the movable block 82 with the centrifugal force generated by its high-speed rotation. At this time, the movable block 82 will extend from the sleeve plate 81, and the position of the hook 84 will be above the threaded rod 52. At this time, when the safety door 5 is opened, the threaded rod 52 will extend from the sleeve 51. After the threaded rod 52 is extended, the rotating hook 84 will hang on the threaded rod 52, and the safety door 5 is limited, so that the staff cannot open the safety door 5, avoiding the staff from misjudging the wind force, resulting in the maintenance work still going to the maintenance platform 4 when the wind force is strong, and the movable block 82 and the inner wall of the sleeve plate 81 are locked. An elastic rope 83 is fixedly connected, and after the wind force decreases, the movable block 82 can be retracted into the sleeve plate 81 by utilizing its resilience. At this time, the safety door 5 can be opened normally, and the maintenance platform 4 can be used for related maintenance work. The elastic rope 83 has a maximum stretching length, and after it reaches the maximum stretching length, it cannot be stretched further, which can ensure that the centrifugal force is too large and the entire movable block 82 is directly thrown out of the sleeve plate 81. A mounting hole 85 is provided on the side of the movable block 82 close to the hook 84, and a shaft rod 86 is rotatably connected in the mounting hole 85. The top and bottom ends of the shaft rod 86 are fixedly connected to the hook 84, and a spring 87 is fixedly connected between the shaft rod 86 and the inner wall of the mounting hole 85. The bottom of the hook 84 is fixedly connected to a fixing frame 9. The fixing frame 9 The bottom end is fixedly connected with a knocking frame 91 with a hollow structure. The height of the knocking frame 91 is flush with the top of the threaded rod 52 when the sleeve 51 is retracted. The knocking frame 91 is made of metal material. The knocking frame 91 and the hook 84 on the same side are staggered. Since the knocking frame 91 is a hollow structure, when it collides with the hollow threaded rod 52, a loud sound can be generated, which serves as a warning. When the knocking frame 91 collides with the threaded rod 52, since the transmission frame 8 is still rotating, the rotation force will cooperate with the fixed threaded rod 52 to make the knocking frame 91 drive the hook 84 to rotate. In this process, the shaft 86 rotates with the hook 84 and drives the spring 87 to tighten. At this time, after the knocking frame 91 rotates, it can pass over the threaded rod 52.When the striking frame 91 passes over the threaded rod 52, the spring 87 starts to rebound, and the shaft 86 is used to drive the hook 84 and the striking frame 91 to rotate back to the original position, so that the striking frame 91 can continue to strike the threaded rod 52 next time. Since the striking frame 91 and the hook 84 on the same side are staggered, when the threaded rod 52 does not extend out of the sleeve 51, the striking frame 91 can collide with the threaded rod 52 normally. When the threaded rod 52 extends out of the sleeve 51, the hook 84 will contact the threaded rod 52 before the striking frame 91. At this time, the hook 84 will be hung on the threaded rod 52 and limit the safety door 5, while preventing the striking frame 91 from continuing to strike the threaded rod 52.

[0027] Furthermore, under normal conditions, the wind cup 72 will rotate due to the influence of wind force, thereby driving the limit frame 71 to rotate. At this time, the movable block 82 is placed in the sleeve plate 81 through the limit function of the elastic rope 83. At this time, there is a certain distance gap between the knocking frame 91 and the threaded rod 52, so that the knocking frame 91 does not collide with the threaded rod 52. As the wind force increases, the rotation speed of the wind cup 72 and the limit frame 71 will increase, causing the rotation speed of the transmission frame 8 to also increase, so that the centrifugal force generated when the transmission frame 8 is transmitted can be used to throw the movable block 82 out of the sleeve plate 81 by a certain distance. The distance between the knocking frame 91 and the threaded rod 52 becomes shorter, and the knocking frame 91 will continuously collide with the threaded rod 52 during the rotation, thereby making a sound to remind the staff. At this time, if the staff misjudges the wind force and wants to open the safety door 5, the threaded rod 52 will extend from the sleeve 51 during the opening of the safety door 5, and the rotating hook 84 will be hung on the threaded rod 52, thereby limiting the safety door 5 and preventing the staff from opening the safety door 5, thereby improving the protection of the staff.

[0028] Working principle: First, the tower crane is installed at the designated working position, and then the staff can climb up the base frame 1 through the stairs and enter the cab 11, and control the tower crane through the cab 11. Through the cooperation of the tractor 22, the hoist 3 and the carrying platform, the horizontal position and height position of the hook can be changed, so that the hook can be used to lift and transport objects; During the working process, the wind cup 72 will rotate due to the influence of wind force, thereby driving the limit frame 71 to rotate. At this time, the movable block 82 is placed in the sleeve plate 81 through the limiting function of the elastic rope 83. At this time, there is a certain distance gap between the knocking frame 91 and the threaded rod 52, so that the knocking frame 91 does not collide with the threaded rod 52. As the wind force increases, the rotation speed of the wind cup 72 and the limit frame 71 will increase, causing the rotation speed of the transmission frame 8 to also increase. The centrifugal force generated when the transmission frame 8 is transmitted is used to throw the movable block 82 out of the sleeve plate 81 by a certain distance. At this time, the distance between the knocking frame 91 and the threaded rod 52 becomes shorter, and the knocking frame 91 will continuously collide with the threaded rod 52 during the rotation. When the striking frame 91 collides with the threaded rod 52, a sound is emitted to remind the staff. When the striking frame 91 collides with the threaded rod 52, the transmission frame 8 is still rotating. Through the rotation force, it cooperates with the fixed threaded rod 52, so that the striking frame 91 drives the hook 84 to rotate. In this process, the shaft 86 rotates with the hook 84 and drives the spring 87 to tighten. At this time, after the striking frame 91 rotates, it can pass over the threaded rod 52. After the striking frame 91 passes over the threaded rod 52, the spring 87 starts to rebound, and the shaft 86 drives the hook 84 and the striking frame 91 to rotate back to the original position, so that the striking frame 91 can continue to strike the threaded rod 52 next time. At this time, if the staff misjudges the wind force and wants to open the safety door 5, during the process of opening the safety door 5, since the gear 55 and the arc-shaped rack 61 are meshed with each other, the fixed arc-shaped rack 61 will cause the gear 55 to rotate, and the gear 55 will drive the threaded sleeve 54 to rotate. At this time, since the threaded rod 52 is limited by the slide groove 56 and the slider 57, during the rotation of the threaded sleeve 54, the threaded rod 52 can extend from the sleeve 51, and the rotating hook 84 will be hung on the threaded rod 52, thereby limiting the safety door 5, making it impossible for the staff to open the safety door 5. At this time, the staff can close the safety door 5. During the closing process of the safety door 5, the gear 55 will rotate in the opposite direction and drive the threaded sleeve 54 to rotate in the opposite direction. At this time, the threaded rod 52 will shrink toward the sleeve 51 and disengage from the hook 84, and the hook 84 will continue to rotate normally. When the wind force becomes smaller, the elastic force of the elastic rope 83 is used to retract the movable block 82 into the sleeve plate 81. At this time, the distance between the knocking frame 91 and the threaded rod 52 becomes farther, so that the knocking frame 91 no longer knocks the threaded rod 52, so that the alarm sound is eliminated, and the safety door 5 can be opened normally at this time. Then the staff can go to the maintenance platform 4, and before that, tie the safety rope to the fixed rod 21, and then go to the maintenance platform 4 to perform maintenance work on the traction machine 22. When the hoist 3 needs to be repaired, the hoist 3 is controlled to move to one side of the maintenance platform 4, so that the load-bearing basket 31 is fitted together with the maintenance platform 4, and then go to the maintenance platform 4, and then open the railing B42. At this time, follow the ladder 32 on the load-bearing basket 31 to enter the load-bearing basket 31, and then the hoist 3 can be repaired in the load-bearing basket 31.

[0029] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0030] Although 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 the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A heavy tower crane device for construction, comprising a base frame (1), a load-bearing arm (2) being fixedly connected to one side of the top of the base frame (1), a hoist (3) being slidably connected to the load-bearing arm (2), characterized in that: A maintenance platform (4) is fixedly connected to one side of the load-bearing arm (2); a safety door (5) is rotatably connected to one end of the load-bearing arm (2) close to the base frame (1); a sleeve (51) is fixedly connected to the top of the safety door (5) close to the maintenance platform (4); a threaded rod (52) with a hollow structure is slidably connected inside the sleeve (51); a bearing (53) is fixedly connected to the top of the sleeve (51); a threaded sleeve (54) is fixedly connected to the top of the bearing (53); the bearing (53) and the threaded sleeve (54) are both sleeved on the threaded rod (52); the threaded sleeve (54) and the threaded rod (52) are threadedly connected; and a gear (55) is fixedly connected to the top of the threaded sleeve (54); One end of the load-bearing arm (2) close to the safety door (5) is fixedly connected to a mounting frame (6), and the bottom of the mounting frame (6) is fixedly connected to an arc-shaped rack (61), and the tooth block of the arc-shaped rack (61) and the gear (55) are meshed with each other; One end of the load-bearing arm (2) close to the safety door (5) is fixedly connected to a load-bearing frame (7), the top of the load-bearing frame (7) is rotatably connected to a limiting frame (71), and a plurality of wind cups (72) evenly and annularly distributed are fixedly connected to the limiting frame (71); The bottom of the load-bearing frame (7) is rotatably connected to a transmission frame (8), and the top end of the transmission frame (8) is fixedly connected to the bottom end of the limit frame (71). The bottom of the transmission frame (8) is fixedly connected to sleeve plates (81) corresponding to the number of wind cups (72). The sleeve plates (81) are sleeved with movable blocks (82) in sliding connection at one end away from the transmission frame (8). The movable blocks (82) are rotatably connected to one end away from the transmission frame (8).

2. A heavy tower crane device for construction according to claim 1, characterized in that: An elastic rope (83) is fixedly connected between the movable block (82) and the inner wall of the sleeve plate (81); a mounting hole (85) is provided on a side of the movable block (82) close to the hook (84); a shaft rod (86) is rotatably connected in the mounting hole (85); the top and bottom ends of the shaft rod (86) are fixedly connected to the hook (84); and a spring (87) is fixedly connected between the shaft rod (86) and the inner wall of the mounting hole (85).

3. A heavy tower crane device for construction according to claim 2, characterized in that: The bottom of the hook (84) is fixedly connected to a fixing frame (9), and the bottom end of the fixing frame (9) is fixedly connected to a knocking frame (91) with a hollow structure, and the knocking frame (91) and the hook (84) on the same side are staggered.

4. A heavy tower crane device for construction according to claim 1, characterized in that: The rotating shaft of the safety door (5) is located on a side away from the maintenance platform (4), and the arc center position of the arc-shaped rack (61) is vertically parallel to the rotating shaft position of the safety door (5).

5. A heavy tower crane device for construction according to claim 1, characterized in that: The inner wall of the sleeve (51) is provided with a plurality of sliding grooves (56), and each of the sliding grooves (56) is slidably connected with a slider (57), and each of the sliders (57) is fixedly connected to the bottom end of the threaded rod (52).

6. A heavy tower crane device for construction according to claim 1, characterized in that: The top of the inspection platform (4) is fixedly connected to a railing A (41) on one side away from the load-bearing arm (2) and on the side close to the base frame (1), and the top of the inspection platform (4) is rotatably connected to a railing B (42) on one side close to the hoist (3).

7. A heavy tower crane device for construction according to claim 6, characterized in that: A load-bearing basket (31) is fixedly connected to one side of the hoist (3); the load-bearing basket (31) and the maintenance platform (4) are located on the same side of the load-bearing arm (2); and a ladder (32) is provided on the side of the load-bearing basket (31) close to the maintenance platform (4).

8. A heavy tower crane device for construction according to claim 1, characterized in that: A fixing rod (21) is fixedly connected to one side of the load-bearing arm (2) close to the maintenance platform (4), and a traction machine (22) is fixedly connected to one end of the load-bearing arm (2) close to the base frame (1), and the traction machine (22) and the hoist (3) are connected via a traction rope.

9. A heavy tower crane device for construction according to claim 1, characterized in that: A cab (11) is provided on one side of the top of the base frame (1), a load-bearing platform (12) is fixedly connected to the side of the top of the base frame (1) away from the load-bearing arm (2), and a plurality of counterweight blocks (13) are provided on one end of the load-bearing platform (12) away from the base frame (1).

10. A heavy tower crane device for construction according to claim 9, characterized in that: A rotatable bearing platform is provided on the base frame (1), and the driving cab (11), the load-bearing platform (12) and the load-bearing arm (2) are all located on the bearing platform of the base frame (1).

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