A tower crane counterweight protection device

Abstract

The utility model discloses a tower crane counterweight protection device belongs to tower crane safety device technical field, including the walk platform, the upper end side of walk platform is provided with side guardrail and end head guardrail assembly mechanism, and the side of side guardrail and end head guard rail assembly mechanism is provided with counterweight guardrail length adjusting mechanism, the side guardrail and end head guard rail assembly mechanism includes the first vertical rod, and the upper end side of walk platform is provided with the first vertical rod, and the first vertical rod is fixedly connected through vertical rod fixed assembly between walk platform, and the upper end surface of first vertical rod is provided with the disc, the utility model discloses be provided with side guardrail and end head guard rail assembly mechanism, and the scene need not welding, and the fixed rod is inserted walk platform after bolt locking and can be positioned, the disc is realized with the cross bar quick buckling of card lock, and the arc clamping plate four of inclined support assembly tightly embrace the outer wall of cross bar and form triangular stable system, and the dismounting sequence is reversible, and the component is recycled, and the maintenance and turnover cost are reduced greatly.

Description

Technical Field

[0001] This utility model belongs to the technical field of tower crane safety protection devices, specifically relating to a tower crane counterweight protection device. Background Technology

[0002] The counterweight protection device for tower cranes is a mechanical safety structure installed at the tail of the counterweight boom to prevent the counterweight from slipping or overturning. It typically consists of platform guardrails, end guardrails, connecting clamps, and a tie rod system. Its function is to laterally limit and end-face stop the concrete or cast iron counterweight, weighing several tons or even tens of tons, during the operation, installation, and dismantling of the tower crane. This prevents the counterweight from slipping out due to vibration, impact, or misoperation, thereby avoiding serious accidents such as boom imbalance and complete crane overturning. It is an important component of the inherent safety of tower cranes.

[0003] Existing technologies generally use welded angle steel frames or fixed steel pipes as guardrails. Although they have sufficient rigidity, the on-site assembly workload is large, and disassembly and assembly require cutting or the use of a large number of bolts, resulting in low turnover efficiency. Once local deformation occurs, the entire structure must be replaced, leading to high repair costs. At the same time, traditional counterweight guardrails are fixed-length structures. When faced with different widths and quantities of counterweight combinations, they need to be cut or lengthened separately, which is inconvenient to adjust, time-consuming, and labor-intensive, making it difficult to meet the requirements of rapid replacement and standardized construction. Utility Model Content

[0004] To address the problems mentioned in the background art, this utility model provides a tower crane counterweight protection device to enable rapid assembly of platform side railings, end railings, and counterweight railings, and to provide the counterweight railings with length adjustment function to meet standardized construction requirements and reduce turnover and maintenance costs.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a tower crane counterweight protection device, including a walkway, wherein a side guardrail and an end guardrail assembly mechanism are provided on the upper side of the walkway, and a counterweight guardrail length adjustment mechanism is provided on the side of the side guardrail and end guardrail assembly mechanism.

[0006] The side railing and end railing assembly mechanism includes a first longitudinal bar. The first longitudinal bar is provided on the upper side of the walkway. The first longitudinal bar is fixedly connected to the walkway by a longitudinal bar fixing assembly. A disc is provided on the upper surface of the first longitudinal bar. A first horizontal bar is provided on one side of the disc. The disc is fixedly connected to the first horizontal bar by a locking pin. A second horizontal bar is provided on the other side of the disc. The second horizontal bar is fixedly connected to the disc by a locking pin. A second longitudinal bar is provided at the upper end of the first longitudinal bar. The first longitudinal bar and the second longitudinal bar are fixedly connected by a longitudinal bar assembly assembly. The first horizontal bar and the second horizontal bar are fixedly connected by a diagonal support assembly.

[0007] Preferably, the longitudinal rod fixing assembly includes a fixing rod, the lower end of the first longitudinal rod is provided with a fixing rod, the inside of the walkway is provided with a fixing hole corresponding to the fixing rod, and the lower end of the fixing rod is internally threaded with a bolt.

[0008] Preferably, a limiting plate is provided on the lower end surface of the first longitudinal rod at the upper end of the fixed rod.

[0009] Preferably, the longitudinal rod assembly includes a connecting rod, the lower end of the second longitudinal rod is provided with a connecting rod, the upper end of the first longitudinal rod is provided with a connecting hole corresponding to the connecting rod, and the connecting rod and the connecting hole are fixedly connected by bolts.

[0010] Preferably, the inclined support assembly includes an arc-shaped clamping plate three, an arc-shaped clamping plate three is provided at the upper end of the first crossbar, an inclined support rod is provided at the upper end of the arc-shaped clamping plate three, a screw rod two is provided at the lower end of the arc-shaped clamping plate three, a through hole corresponding to the screw rod two is opened inside the first crossbar, an arc-shaped clamping plate four is provided below the arc-shaped clamping plate three at the lower end of the first crossbar, a nut two is threadedly connected to the lower end surface of the screw rod two, an arc-shaped clamping plate one is provided at the upper end of the inclined support rod, a screw rod one is provided at the upper end of the arc-shaped clamping plate one, a through hole corresponding to the screw rod one is opened inside the second crossbar, an arc-shaped clamping plate two is provided above the arc-shaped clamping plate one at the upper end of the second crossbar, and a nut one is threadedly connected to the upper end surface of the screw rod one.

[0011] Preferably, the counterweight guardrail length adjustment mechanism further includes a support rod, wherein a support rod is provided on the side of a set of discs, a length adjustment component is provided at the other end of the support rod, and a U-shaped rod is provided at the other end of the length adjustment component.

[0012] Preferably, the length adjustment component includes an inner rod, one end of the U-shaped rod is provided with the inner rod, the support rod has a corresponding insertion hole for the inner rod, the inner rod and the support rod are fixedly connected by bolts, and the upper end of the inner rod has multiple sets of screw holes corresponding to bolts.

[0013] Compared with the prior art, the beneficial effects of this utility model are: 1. This utility model features a side guardrail and end guardrail assembly mechanism that eliminates the need for on-site welding. The fixing rod can be positioned simply by inserting it into the walkway and tightening the bolts. The disc and the locking pin enable quick engagement of the crossbar. The arc-shaped locking plate of the inclined support component clamps the outer wall of the crossbar at four points to form a triangular stability system. The assembly and disassembly sequence is reversible, and the components can be recycled, significantly reducing maintenance and turnover costs.

[0014] 2. This utility model features a counterweight guardrail length adjustment mechanism. The inner rod slides within the support rod, and the bolts lock instantly to the corresponding screw holes. Pushing and pulling the U-shaped rod allows for the fitting of counterweights of various thicknesses. The adjustment process requires no cutting, can be operated by a single person, meets the needs of rapid replacement, and improves the efficiency of standardized construction. Attached Figure Description

[0015] Figure 1 This is a perspective view of the present utility model; Figure 2 This is a perspective view of the assembly mechanism for the side guardrail and end guardrail of this utility model; Figure 3 This is a perspective view of the longitudinal rod mounting assembly of this utility model; Figure 4 This is a perspective view of the inclined support component of this utility model; Figure 5 This is a perspective view of the counterweight guardrail length adjustment mechanism of this utility model; Figure 6 This is a perspective view of the length adjustment component of this utility model; In the diagram: 1. Walkway; 2. Side railing and end railing assembly mechanism; 21. Second longitudinal bar; 22. Longitudinal bar assembly assembly; 221. Connecting rod; 222. Connecting hole; 223. Bolt 1; 23. Disc; 24. Locking pin 1; 25. First longitudinal bar; 26. Longitudinal bar fixing assembly; 261. Limiting disc; 262. Fixing rod; 263. Fixing hole; 264. Bolt 2; 27. First horizontal bar; 28. Locking pin 2; 29. ​​Diagonal support assembly Components; 291. Arc-shaped clamping plate II; 292. Nut I; 293. Screw I; 294. Arc-shaped clamping plate I; 295. Diagonal support rod; 296. Nut II; 297. Arc-shaped clamping plate IV; 298. Screw II; 299. Arc-shaped clamping plate III; 210. Second crossbar; 3. Counterweight guardrail length adjustment mechanism; 31. U-shaped rod; 32. Length adjustment component; 321. Inner rod; 322. Bolt III; 323. Screw hole; 33. Support rod. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] Example 1: Please see Figure 1-6 The present invention provides the following technical solution: a tower crane counterweight protection device, including a walkway 1, a side guardrail and end guardrail assembly mechanism 2 is provided on the upper side of the walkway 1, and a counterweight guardrail length adjustment mechanism 3 is provided on the side of the side guardrail and end guardrail assembly mechanism 2. The side railing and end railing assembly mechanism 2 includes a first longitudinal bar 25. The first longitudinal bar 25 is provided on the upper side of the walkway 1. The first longitudinal bar 25 is fixedly connected to the walkway 1 by a longitudinal bar fixing assembly 26. A disc 23 is provided on the upper surface of the first longitudinal bar 25. A first horizontal bar 27 is provided on one side of the disc 23. The disc 23 and the first horizontal bar 27 are fixedly connected by a locking pin 24. A second horizontal bar 210 is provided on the other side of the disc 23. The second horizontal bar 210 is fixedly connected to the disc 23 by a locking pin 28. A second longitudinal bar 21 is provided at the upper end of the first longitudinal bar 25. The first longitudinal bar 25 and the second longitudinal bar 21 are fixedly connected by a longitudinal bar assembly assembly 22. The first horizontal bar 27 and the second horizontal bar 210 are fixedly connected by a diagonal support assembly 29.

[0018] Specifically, the longitudinal rod fixing assembly 26 includes a fixing rod 262. The lower end of the first longitudinal rod 25 is provided with the fixing rod 262. The interior of the platform 1 is provided with a fixing hole 263 corresponding to the fixing rod 262. The lower end of the fixing rod 262 is internally threaded with a bolt 264. By adopting the above technical solution, after the fixing rod 262 is inserted into the fixing hole 263, the bolt 264 is tightened from bottom to top, so that the limiting plate 261 fits against the surface of the platform 1, completing the quick positioning and anti-loosening of the first longitudinal rod 25. During disassembly, the entire assembly can be pulled out by simply unscrewing the bolt 264, achieving welding-free installation. The bolt 264 is a high-strength bolt. The fixing rod 262 and the fixing hole 263 adopt an transition fit or are designed with anti-rotation pins, so that the bolt mainly bears tensile force rather than shear force.

[0019] Specifically, a limiting plate 261 is provided on the lower end surface of the first longitudinal bar 25 at the upper end of the fixed bar 262. By adopting the above technical solution, the limiting plate 261 fits against the upper surface of the walkway 1 to form an end face positioning, which can prevent the fixed bar 262 from continuing to slide down, while dispersing the lateral load and improving the overturning resistance of the connection part.

[0020] Specifically, the longitudinal rod assembly 22 includes a connecting rod 221. The lower end of the second longitudinal rod 21 is provided with the connecting rod 221, and the upper end of the first longitudinal rod 25 is provided with a corresponding connecting hole 222 for the connecting rod 221. The connecting rod 221 and the connecting hole 222 are fixedly connected by a bolt 223. By adopting the above technical solution, after the connecting rod 221 is inserted into the connecting hole 222, the bolt 223 passes laterally through the preset hole positions of both to form a hinge-rigid composite node, which ensures that the upper and lower longitudinal rods are concentric and allows for slight angle adjustment to adapt to unevenness on site.

[0021] Specifically, the inclined support assembly 29 includes an arc-shaped clamping plate 299, an arc-shaped clamping plate 299 at the upper end of the first crossbar 27, an inclined support rod 295 at the upper end of the arc-shaped clamping plate 299, a screw rod 298 at the lower end of the arc-shaped clamping plate 299, a through hole corresponding to the screw rod 298 inside the first crossbar 27, an arc-shaped clamping plate 297 below the arc-shaped clamping plate 299 at the lower end of the first crossbar 27, a nut 296 threadedly connected to the lower end surface of the screw rod 298, an arc-shaped clamping plate 294 at the upper end of the inclined support rod 295, a screw rod 293 at the upper end of the arc-shaped clamping plate 294, and a corresponding screw rod 293 inside the second crossbar 210. The through hole of rod 293, the upper end of the second crossbar 210 is located above the arc-shaped clamping plate 294 and is provided with arc-shaped clamping plate 291. The upper end surface of screw rod 293 is threaded with nut 292. By adopting the above technical solution, arc-shaped clamping plate 294 and arc-shaped clamping plate 291, arc-shaped clamping plate 3 and arc-shaped clamping plate 4 respectively hug the outer wall of the crossbar to form a four-point clamping. The diagonal support rod 295 and the crossbar form a triangular stability system, which can withstand bidirectional tension and pressure, and prevent the overall swaying of the guardrail. The inner walls of arc-shaped clamping plate 1, arc-shaped clamping plate 2, arc-shaped clamping plate 3 and arc-shaped clamping plate 4 are all provided with knurling to increase friction. Nut 2 is a lock nut to ensure the connection is durable and reliable.

[0022] In this embodiment, the fixing rod 262 is inserted into the fixing hole 263 and the bolt 264 is tightened to position the first longitudinal rod 25. Then, the connecting rod 221 is inserted into the connecting hole 222 and the bolt 223 is inserted to connect the second longitudinal rod 21 to the first longitudinal rod 25. Subsequently, the first horizontal rod 27 and the second horizontal rod 210 are fixed to the disc 23 with the first locking pin 24 and the second locking pin 28 to form a closed frame. Finally, the diagonal support component 29 is installed and the nuts 292 and 296 are tightened to complete the rapid assembly of the disc-lock guardrail. The entire process requires no welding and can be recycled in reverse order during disassembly. The components can be reused.

[0023] Example 2: The difference between this embodiment and embodiment 1 is that the counterweight guardrail length adjustment mechanism 3 also includes a support rod 33. A support rod 33 is provided on the side of a set of discs 23, and a length adjustment component 32 is provided at the other end of the support rod 33. A U-shaped rod 31 is provided at the other end of the length adjustment component 32. By adopting the above technical solution, the support rod 33 and the disc 23 are connected by the same specification of locking pin to achieve modular transition. The U-shaped rod 31 can fasten the edge of the counterweight block to form a lateral limit. The length adjustment component 32 is used to change the relative position of the support rod 33 and the U-shaped rod 31 to adapt to counterweights of different thicknesses.

[0024] Specifically, the length adjustment component 32 includes an inner rod 321. One end of the U-shaped rod 31 is provided with the inner rod 321. The support rod 33 has a corresponding insertion hole for the inner rod 321. The inner rod 321 and the support rod 33 are fixedly connected by bolts 322. The upper end of the inner rod 321 has multiple sets of screw holes 323 corresponding to the bolts 322. By adopting the above technical solution, the inner rod 321 slides in the support rod 33. The bolts 322 can lock the length by passing through the screw holes 323 at different positions, realizing stepless adjustment. The adjustment process does not require removing the guardrail. Simply loosen the bolts 322, push and pull the U-shaped rod 31 to the desired position, and then tighten them again to complete the quick adaptation of the counterweight guardrail length.

[0025] In this embodiment, the support rod 33 is first connected to the disc 23, then the inner rod 321 is inserted into the support rod 33. The U-shaped rod 31 is pulled according to the thickness of the counterweight so that it fits against the side of the counterweight. Then the bolt 322 is inserted and tightened to lock the length. When the amount of counterweight changes, the above push-pull-tightening action is repeated to achieve real-time adjustment of the guardrail length, avoiding cutting or welding and improving turnover efficiency.

[0026] The working principle and usage process of this utility model are as follows: When using this utility model, firstly, the walkway 1 is fixed to the tail of the tower crane's balance arm. The first longitudinal rod 25 is vertically installed on the edge of the walkway 1 using the longitudinal rod fixing assembly 26, and the limiting plate 261 is attached to the surface of the walkway 1 to form the first anti-overturning support point. Then, the second longitudinal rod 21 is extended by the longitudinal rod assembly assembly 22, and the first horizontal rod 27 and the second horizontal rod 210 are then fastened into the disc 23 in sequence using the first locking pin 24 and the second locking pin 28 to form a closed rectangular frame. The arc-shaped locking plate of the inclined support assembly 29 hugs the outer wall of the horizontal rod to form a triangular stability system to resist bidirectional vibration.

[0027] When it is necessary to limit the displacement of the counterweight, connect the support rod 33 to the same disc 23, insert the inner rod 321 into the inner cavity of the support rod 33, push and pull the U-shaped rod 31 to make it fit tightly against the side of the counterweight, and then insert the bolt 322 and tighten it to complete the length locking. When changing the number of counterweights, simply loosen the bolt 322, push and pull it to the new position and tighten it again to achieve instant adaptation of the guardrail length. The whole process does not require welding or cutting, and the components can be recycled to achieve the purpose of quick disassembly and assembly, repeated turnover, and reduced maintenance costs.

[0028] Although embodiments of the present 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 present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A tower crane counterweight protection device, comprising a walkway (1), characterized in that: The upper side of the walkway (1) is provided with a side rail and end rail assembly mechanism (2), and the side of the side rail and end rail assembly mechanism (2) is provided with a counterweight rail length adjustment mechanism (3). The side railing and end railing assembly mechanism (2) includes a first longitudinal bar (25). The upper side of the walkway (1) is provided with the first longitudinal bar (25). The first longitudinal bar (25) and the walkway (1) are fixedly connected by a longitudinal bar fixing assembly (26). The upper surface of the first longitudinal bar (25) is provided with a disc (23). A first horizontal bar (27) is provided on one side of the disc (23). The disc (23) and the first horizontal bar (27) are fixed by a locking pin (24). The disk (23) is fixedly connected to the other side by a second crossbar (210), and the second crossbar (210) is fixedly connected to the disk (23) by a second locking pin (28). The upper end of the first vertical bar (25) is provided with a second vertical bar (21), and the first vertical bar (25) and the second vertical bar (21) are fixedly connected by a vertical bar assembly (22). The first crossbar (27) and the second crossbar (210) are fixedly connected by a diagonal support assembly (29).

2. The tower crane counterweight protection device according to claim 1, characterized in that: The longitudinal rod fixing assembly (26) includes a fixing rod (262). The lower end of the first longitudinal rod (25) is provided with a fixing rod (262). The walkway (1) has a fixing hole (263) corresponding to the fixing rod (262) inside. The lower end of the fixing rod (262) is threaded with a bolt (264).

3. The tower crane counterweight protection device according to claim 2, characterized in that: The lower end surface of the first longitudinal bar (25) is provided with a limit plate (261) located at the upper end of the fixed bar (262).

4. The tower crane counterweight protection device according to claim 1, characterized in that: The longitudinal rod assembly (22) includes a connecting rod (221). The lower end of the second longitudinal rod (21) is provided with a connecting rod (221), and the upper end of the first longitudinal rod (25) is provided with a connecting hole (222) corresponding to the connecting rod (221). The connecting rod (221) and the connecting hole (222) are fixedly connected by a bolt (223).

5. A tower crane counterweight protection device according to claim 1, characterized in that: The inclined support assembly (29) includes an arc-shaped clamping plate three (299), an arc-shaped clamping plate three (299) is provided at the upper end of the first crossbar (27), an inclined support rod (295) is provided at the upper end of the arc-shaped clamping plate three (299), a screw rod two (298) is provided at the lower end of the arc-shaped clamping plate three (299), a through hole corresponding to the screw rod two (298) is opened inside the first crossbar (27), an arc-shaped clamping plate four (297) is provided at the lower end of the first crossbar (27) below the arc-shaped clamping plate three (299), and a screw rod two The lower end surface of (298) is threaded with a nut (296), the upper end of the inclined support rod (295) is provided with an arc-shaped clamping plate (294), the upper end of the arc-shaped clamping plate (294) is provided with a screw (293), the interior of the second crossbar (210) is provided with a through hole corresponding to the screw (293), the upper end of the second crossbar (210) is located above the arc-shaped clamping plate (294) and an arc-shaped clamping plate (291) is provided, the upper end surface of the screw (293) is threaded with a nut (292).

6. A tower crane counterweight protection device according to claim 1, characterized in that: The counterweight guardrail length adjustment mechanism (3) also includes a support rod (33), wherein a support rod (33) is provided on the side of a set of discs (23), and a length adjustment component (32) is provided at the other end of the support rod (33), and a U-shaped rod (31) is provided at the other end of the length adjustment component (32).

7. A tower crane counterweight protection device according to claim 6, characterized in that: The length adjustment component (32) includes an inner rod (321). One end of the U-shaped rod (31) is provided with the inner rod (321). The support rod (33) has a corresponding insertion hole for the inner rod (321). The inner rod (321) and the support rod (33) are fixedly connected by bolts (322). The upper end of the inner rod (321) has multiple sets of screw holes (323) corresponding to bolts (322).

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