Anti-retreating device for standard knot pin shaft of tower crane

Abstract

The utility model relates to the technical field of welding assistance, and discloses a tower crane standard knot pin shaft anti-retreating device in order to solve the problem of high cost caused by manual maintenance in the prior art. Comprising a U-shaped steel plate sleeved on the outer side of a tower crane standard knot pin shaft, a fixing hole is arranged on the U-shaped steel plate, the fixing hole corresponds to a pin shaft hole on the pin shaft, and a vertical pin penetrates through the fixing hole to fix the U-shaped steel plate. In the operation process of the tower crane, the pin shaft of the standard knot of the tower crane is withdrawn due to the influence of a hoisted object and the stress of the tower crane, so that the vertical pin of the standard knot is deformed, and therefore, after the n-shaped steel plate is sleeved, when the pin shaft is withdrawn in the operation process of the tower crane, the n-shaped steel plate can be stressed to prevent the pin shaft from withdrawing; therefore, the function of stopping the pin shaft from retreating is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of welding auxiliary tools, in particular to a tower crane standard section pin shaft anti-retraction device. Background Art

[0002] Tower cranes, also known as "tower cranes," are the most commonly used lifting equipment on construction sites. They are connected in lengths (heights) of several sections (referred to as "standard sections") and are used to lift materials such as steel bars, wooden planks, concrete, and steel pipes for construction. Tower cranes are essential equipment on construction sites. The function of the tower crane tip is to bear the upper load transmitted by the boom and counter-arm cables, and transmit this load directly to the tower structure through the slewing tower, turntable, and bearing components. Self-elevating tower tops can be truncated cone columns, forward- or backward-inclined truncated cone columns, herringbone frames, or diagonal braces. All slewing tower cranes require a counterweight to support the counterweight and create the required balancing torque in the opposite direction of the lifting torque.

[0003] During construction, tower cranes require pins to connect their standard sections to ensure stability. Traditionally, these pins are used, but during construction, they can become loose or even fall out due to factors like crane sway, vibration, and wind. A tower crane can have hundreds of pins, and if these pins aren't discovered promptly, they can seriously impact the crane's safety. Therefore, maintenance personnel must periodically reinsert any lost pins and replace them, increasing labor and time costs. Utility Model Content

[0004] The purpose of the utility model is to provide a tower crane standard section pin shaft anti-retraction device to solve the problem of high cost caused by the need for manual maintenance in the prior art.

[0005] To achieve the above-mentioned purpose, the specific technical solution of a tower crane standard section pin anti-retraction device of the present utility model is as follows:

[0006] A tower crane standard section pin shaft anti-retraction device includes a U-shaped steel plate sleeved on the outside of the tower crane standard section pin shaft, the U-shaped steel plate is provided with a fixing hole, the fixing hole corresponds to the pin shaft hole on the pin shaft, and a vertical pin passes through the fixing hole to fix the U-shaped steel plate.

[0007] Furthermore, the fixing holes include at least two fixing holes adapted to vertical pins of different specifications.

[0008] Furthermore, the U-shaped steel plate includes two horizontally arranged steel plates and one vertically arranged steel plate, and the connection parts of each steel plate are welded.

[0009] Further, a polyurethane coating for anti-corrosion is provided on the outer surface of the C-shaped steel plate.

[0010] Further, fixing bolts for fixing the vertical pin are provided on the side surface of the horizontal steel plate of the C-shaped steel plate.

[0011] The anti-retreat device for the pin of the tower crane standard section provided by the utility model has the following advantages:

[0012] 1. It has strong bearing capacity and can effectively prevent the pin from retreating when stressed, thus avoiding safety accidents caused by the pin retreating during the operation of the tower crane.

[0013] 2. The installation process is simple. It only needs to sleeve the C-shaped steel plate on the pin and fix it with a vertical pin, without complex tools or techniques, reducing the risk of high-altitude operation.

[0014] 3. Due to the simple structure, the device is very convenient to check or replace. There is no need to disassemble the entire tower crane standard section, greatly reducing the maintenance cost and time.

[0015] 4. It is convenient to purchase and process. The steel plates are relatively common on the construction site and in the market. It only needs to weld the steel plates to each other to complete the production.

[0016] 5. The cost is low. It reduces the rising labor and time costs of maintenance personnel to reinsert the retreated pin and replace the vertical pin at regular intervals, and alleviates the maintenance work. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Schematic diagram of the device for fixing the pin integrally provided by the utility model;

[0018] Figure 2 Schematic diagram of the device integrally provided by the utility model;

[0019] <> Figure 3 Schematic diagram of the multi-specification fixing hole device provided by the utility model;

[0020] Figure 4 Schematic diagram of the device for fixing the pin with multi-specification fixing holes provided by the utility model;

[0021] Figure 5 Schematic diagram of the device with fixing bolts provided by the utility model.

[0022] In the figure: 1. C-shaped steel plate; 2. Fixing hole; 3. Pin; 4. Vertical pin; 5. Fixing bolt. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] In order to make the objectives, technical solutions and advantages of the present utility model more clear and understandable, the present utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0024] Embodiment 1

[0025] Refer to Figure 1 and Figure 2 The present utility model provides a pin anti-withdrawal device for a tower crane standard section, which is used in the occasion of a tower crane standard section. A pin anti-withdrawal device for a tower crane standard section includes a C-shaped steel plate 1 sleeved outside the pin 3 of the tower crane standard section. A fixing hole 2 is provided on the C-shaped steel plate 1, and the fixing hole 2 corresponds to the pin hole on the pin 3. A vertical pin 4 passes through the fixing hole 2 to fix the C-shaped steel plate 1.

[0026] The pin anti-withdrawal device for the tower crane standard section of the present application is mainly composed of a C-shaped steel plate 1. The C-shaped steel plate 1 includes two horizontally arranged steel plates and one vertically arranged steel plate. Fixing holes 2 are provided on the horizontally arranged steel plates, and the fixing holes 2 are arranged corresponding to the vertical pins 4 of the tower crane standard section. After the pin 3 of the tower crane standard section is set up, the C-shaped steel plate 1 is sleeved on the pin 3. The open end of the C-shaped steel plate 1 is sleeved into the pin 3 until the fixing holes 2 on the two horizontal steel plates correspond to the pin holes of the vertical pins 4 on the pin 3. At this time, the vertical pin 4 is inserted to fix the pin 3, so that the C-shaped steel plate 1 and the pin 3 form an integral body to complete the fixation. Since the tower crane is affected by the weight of the lifted object and its own stress during operation, the pin 3 of the tower crane standard section may withdraw, resulting in deformation of the vertical pin 4 of the standard section. Therefore, after the C-shaped steel plate 1 of the present application is sleeved, when the tower crane is in operation and the pin 3 is about to withdraw, the C-shaped steel plate 1 can be stressed to prevent the pin 3 from withdrawing, thus achieving the function of stopping the pin 3 from withdrawing.

[0027] Embodiment 2

[0028] Refer to Figure 3 and Figure 4 Differing from Embodiment 1, the fixing slots of the device of the present application are adjustable, and two or more fixing holes 2 of different specifications are provided on the horizontal steel plates of the C-shaped steel plate 1.

[0029] Since the sizes of the vertical pins 4 and the insertion pin holes are different, by setting multiple fixing slots of different sizes, the C-shaped plate can be effectively adapted to vertical pins 4 of different specifications and different diameters, increasing its applicability in different tower crane models. Select fixing holes 2 of appropriate specifications according to actual installation requirements to ensure a more precise match between the device and the pin 3 and improve the stability of the overall structure. And the operator can also select appropriate fixing holes 2 for installation according to actual needs without on-site adjustment or customizing parts, greatly simplifying the installation process and improving the construction efficiency.

[0030] Preferably, a polyurethane coating for anti-corrosion is provided on the outer surface of the C-shaped steel plate 1. By providing the polyurethane coating, the corrosion resistance of the C-shaped steel plate 1 can be effectively improved, and its service life can be extended. The polyurethane coating can effectively resist various corrosive media, such as acids, alkalis, salts, etc., thereby preventing the C-shaped steel plate 1 from being damaged due to environmental erosion during the operation of the tower crane. Due to friction and impact during the operation of the tower crane, the wear resistance of the polyurethane coating can further protect the C-shaped steel plate 1 and reduce damage.

[0031] Embodiment 3

[0032] Refer to Figure 5 , different from Embodiment 1, fixing bolts 5 for fixing the vertical pin 4 are provided on the side surfaces of the horizontal steel plates of the C-shaped steel plate 1. Until the fixing holes 2 on the two horizontal steel plates correspond to the vertical pin 4 holes on the pin shaft 3, and at this time, after inserting the vertical pin 4 to fix the pin shaft 3, by rotating and tightening the fixing bolts 5 on the side, the fixing of the pin shaft 3 and the C-shaped plate is completed.

[0033] Advantages of the present utility model:

[0034] It has strong bearing capacity and can effectively prevent the pin shaft 3 from withdrawing when stressed, thereby avoiding safety accidents caused by the withdrawal of the pin shaft 3 during the operation of the tower crane.

[0035] The installation process is simple. Only need to sleeve the C-shaped steel plate 1 on the pin shaft 3 and fix it with the vertical pin 4, without complex tools or techniques, reducing the risk of high-altitude operations.

[0036] Due to its simple structure, the device is also very convenient when inspection or replacement is required. There is no need to disassemble the entire tower crane standard section, greatly reducing the maintenance cost and time.

[0037] Procurement and processing are convenient. The steel plates are relatively common on the construction site and in the market. Only need to weld the steel plates to each other to complete the production.

[0038] The cost is low, reducing the labor and time costs of maintenance personnel to re-drive the pin shaft 3 that withdraws every once in a while and replace the vertical pin 4, and reducing the maintenance work.

[0039] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A tower crane standard section pin anti-retraction device, characterized in that: It includes a C-shaped steel plate (1) sleeved outside the pin shaft (3) of the tower crane standard section. A fixing hole (2) is provided on the C-shaped steel plate (1), and the fixing hole (2) corresponds to the pin hole on the pin shaft (3). A vertical pin (4) passes through the fixing hole (2) to fix the C-shaped steel plate (1).

2. The tower crane standard section pin anti-retraction device according to claim 1 is characterized in that: The fixing hole (2) includes at least two fixing holes (2) adapted to different specifications of vertical pins (4).

3. The tower crane standard section pin anti-retraction device according to claim 1, characterized in that: The C-shaped steel plate (1) includes two horizontally arranged steel plates and one vertically arranged steel plate, and the connecting parts of each steel plate are welded.

4. The tower crane standard section pin anti-retraction device according to claim 1, characterized in that: A polyurethane coating for anti-corrosion is provided on the outer surface of the C-shaped steel plate (1).

5. The tower crane standard section pin anti-retraction device according to claim 3, characterized in that: Fixing bolts (5) for fixing the vertical pin (4) are provided on the side surface of the horizontal steel plate of the C-shaped steel plate (1).

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