Plug-in type safety guardrail for electric double-beam bridge crane

Abstract

The utility model belongs to the technical field of protection of electric double-beam bridge cranes, and particularly relates to a plug-in type safety guardrail for an electric double-beam bridge crane. Comprising a plurality of vertical rods, base fixing rods are inserted into the bottom ends of the vertical rods through connecting rods and self-locking pins, a plurality of pipe supports are symmetrically welded to the two sides of each vertical rod, the base fixing rods are linearly and evenly distributed, and cross rods are fixed to the two pipe supports at the same horizontal height between every two adjacent vertical rods through self-locking pins. The transverse rod is composed of a fixed transverse rod and a movable transverse rod, and the movable transverse rod is inserted into the fixed transverse rod through a connecting rod and a self-locking pin. All the components can be designed and machined in a standardized mode, batch production is convenient to implement, machining difficulty is lowered, machining efficiency is high, and rapid installation can be achieved when temporary protection is needed, and rapid detachment can be achieved when a crane works normally.

Description

Technical Field

[0001] This utility model belongs to the field of protection technology for electric double girder bridge cranes, and particularly relates to a plug-in safety guardrail for electric double girder bridge cranes. Background Technology

[0002] In metal smelting enterprises, medium and large-sized electric double-girder overhead cranes used for liquid lifting have trolley lifting mechanisms mounted on rails 200mm from the edges of the two main beams. These mechanisms, connected by wire ropes and hooks or a balance beam, move the load up, down, or laterally between the two main beams. This creates a large gap between the two main beams. To avoid affecting the lateral movement of the trolley lifting mechanism, safety railings were only installed on the outer side of the main beams according to safety standards, leaving the inner side without any safety protection. Since the top of these liquid lifting cranes is typically over 10 meters above the ground, this creates a dangerous environment for working at great heights. The lack of safety railings and other effective safety measures during emergency repairs significantly increases the risk of accidents. The risk of fall injuries to workers is high, easily leading to accidents. Typically, temporary on-site fabrication is used to create one-time protective measures. This process is labor-intensive, difficult, and time-consuming. In emergencies, time becomes even more critical. The repeated installation and removal of safety measures during multiple work periods not only wastes materials but also consumes significant maintenance time. Most temporary safety devices are simple measures implemented in emergency situations, often fabricated based on work experience without rigorous professional design, review, and optimization. These temporary safety devices are prone to inadequacies and serious defects, ensuring that high-altitude work still carries a potential high risk.

[0003] Considering the operational characteristics of the trolley lifting mechanism of medium and large-sized electric double-girder bridge cranes and the high risk of falls from heights, it is necessary to implement effective temporary safety protection measures to eliminate the risks faced by personnel working at extremely high heights during temporary and emergency maintenance, thereby mitigating the conflict between production and safety. Specifically:

[0004] 1. It is necessary to address the risk of falls from heights for workers during temporary or emergency work along the track edge to prevent injuries from falls from heights;

[0005] 2. It is necessary to resolve the contradiction between the lateral movement of the trolley lifting mechanism and safety protection, so as to achieve both the normal operation of the trolley lifting mechanism and the improvement of safety performance during temporary operations;

[0006] 3. It is necessary to improve the efficiency of high-altitude operations, reduce the processing and handling time spent on processing temporary protective measures during high-altitude operations, reduce ineffective work in the maintenance process, and improve work efficiency;

[0007] 4. It is necessary to avoid material waste caused by repeated processing of safety measures for high-altitude operations, improve the reuse rate of protective devices, and achieve the goal of completing the work in one go and using it for a long time;

[0008] 5. The temporary safety protection devices need to be standardized in manufacturing to increase their versatility and safety, and reduce processing difficulty and cost;

[0009] 6. It is necessary to address the potential hazards and fall-from-height accidents caused by the non-standard processing and manufacturing of temporary safety devices, and to process and manufacture safety emergency protection devices according to design standards to improve the reliability of temporary safety protection devices, reduce potential hazards of temporary safety devices, and eliminate fall-from-height accidents. Summary of the Invention

[0010] The purpose of this utility model is to provide a plug-in safety guardrail for electric double-girder bridge cranes, which can effectively eliminate the risk of falls from heights; the safety protection device is processed and manufactured according to design standards, increasing its versatility and safety; reducing processing difficulty and material consumption costs; the safety protection device adopts a snap-fit ​​assembly, realizing quick installation and disassembly of the device, reducing the difficulty of installation and disassembly, saving maintenance time, and improving work efficiency; the disassembled snap-fit ​​temporary safety protection device can be disassembled, bundled, and stored, with a small footprint, facilitating the use of the limited space on the top of the crane's main beam, and reducing the time for moving materials up and down, thereby solving the problems existing in the prior art.

[0011] The technical solution adopted by this utility model to solve its technical problem is:

[0012] A plug-in safety guardrail for an electric double-girder bridge crane includes several uprights. The bottom of each upright is connected to a base fixing rod via a connecting rod and a self-locking pin. Several pipe supports are symmetrically welded on both sides of the uprights. The base fixing rods are linearly and evenly distributed. A crossbar is fixed to two pipe supports at the same horizontal height between two adjacent uprights via a self-locking pin. The crossbar consists of a fixed crossbar and a movable crossbar. The movable crossbar is connected to the fixed crossbar via a connecting rod and a self-locking pin.

[0013] Furthermore, the self-locking pin includes a main pin, a pin cap, a secondary pin, a pull ring, and a gravity eccentric piece. The main pin is cylindrical, and the pin cap is circular. The pin cap is located at one end of the main pin, and one side of the pin cap has an outward protrusion. The pull ring passes through and is connected to the protrusion. The other end of the main pin has an elongated notch. The main pin at one end of the notch has a 45-degree bevel. The gravity eccentric piece is located inside the notch. The secondary pin passes through the notched end of the main pin and the gravity eccentric piece, and the secondary pin is interference-fitted onto the main pin.

[0014] Furthermore, the top of one side of the gravity eccentric piece has a 45-degree bevel, and the bottom of the same side has an arc-shaped chamfer. The bevel of the gravity eccentric piece matches the bevel of the kingpin.

[0015] Furthermore, the connecting rod is cylindrical, with a retaining ring in the middle. A through-hole is provided on the connecting rod on one side of the retaining ring, and the width of the through-hole is greater than the outer diameter of the main pin and less than the outer diameter of the pin cap.

[0016] Furthermore, the base fixing rod is in the shape of a round tube, the inner diameter of the base fixing rod is larger than the outer diameter of the connecting rod, triangular ribs are welded on both sides of the base fixing rod, and a through hole is provided at the top of the base fixing rod, the diameter of which is the width of the strip hole.

[0017] Furthermore, the upright is in the shape of a cylindrical tube, and its inner diameter is the same as that of the base fixing rod. The end of the connecting rod away from the slotted hole is inserted into and welded to the bottom of the upright. The end of the upright with the slotted hole is inserted into the base fixing rod through the connecting rod, and the slotted hole is connected to the through hole on the base fixing rod. The self-locking pin passes through the through hole and the slotted hole to movably connect the upright and the base fixing rod. The tube support is U-shaped, with the U-shaped structure opening facing upward. A through hole is opened on the top of the tube support, and the diameter of the through hole on the tube support is the same as the diameter of the through hole on the base fixing rod.

[0018] Furthermore, the fixed crossbar is in the shape of a round tube, and the inner diameter of the fixed crossbar is the same as the inner diameter of the base fixed rod. Both ends of the fixed crossbar are provided with through holes, and the diameter of the through holes on the fixed crossbar is the same as the diameter of the through holes on the base fixed rod. The through hole at one end of the fixed crossbar is aligned with the through hole on the tube support and is connected with a self-locking pin.

[0019] Furthermore, the movable crossbar is in the shape of a cylindrical tube, and its inner diameter is the same as that of the fixed crossbar. One end of the movable crossbar has a through hole, the diameter of which is the same as that of the through hole on the fixed crossbar. The through hole on the movable crossbar is aligned with the through hole on the tube support and a self-locking pin is inserted through it. The end of the connecting rod away from the slotted hole is inserted into and welded to the end of the movable crossbar away from the through hole. The movable crossbar is inserted into the fixed crossbar through the end of the connecting rod with the slotted hole, and the slotted hole is connected to the through hole on the base fixed rod. The self-locking pin passes through the through hole on the movable crossbar and the slotted hole of the connecting rod to movably connect the movable crossbar and the fixed crossbar.

[0020] This utility model has the following beneficial effects:

[0021] 1. It fills the gap in the lack of safety protection devices during temporary or emergency operations at the main beam position of medium and large-sized liquid-cooled double-girder bridge cranes.

[0022] 2. The components are installed by plug-in connection, and the assembly and disassembly process can be completed without special tools. The assembly and disassembly time is short, the work is convenient and efficient.

[0023] 3. The reasonable design of the small-gap interlocking assembly between components and the gravity self-locking function of the self-locking pin increases the load-bearing capacity and safety performance of the safety railing.

[0024] 4. Simple structure, light weight, and low processing cost.

[0025] 5. The modular design allows the entire device to be disassembled into individual components, reducing the difficulty of handling and transporting equipment at heights.

[0026] 6. Each component can be designed and manufactured in a standardized manner, which facilitates mass production, reduces processing difficulty, and increases processing efficiency.

[0027] 7. The crossbar with quantitative telescopic function forms a free tolerance (error compensation) in the length direction, which reduces the difficulty of processing and installation and improves the efficiency of processing and installation.

[0028] 8. The safety railing has a quick installation and disassembly function, which allows it to be reused repeatedly without the need for secondary processing, resulting in low processing costs.

[0029] 9. The pull ring installed on the main pin makes it easy to bundle and hang the main pin when it is not in use, which can prevent the loss of small parts.

[0030] 10. The safety railings adopt standard curing processing measures, which have undergone strict screening and multiple optimizations to avoid potential hazards, improve the reliability of the device, and ensure high safety performance. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the structure of this utility model.

[0032] Figure 2 This is a utility model Figure 1 Enlarged structural diagram at point A in the middle.

[0033] Figure 3 This is a schematic diagram of the base fixing rod structure of this utility model.

[0034] Figure 4 This is a schematic diagram of the upright structure of this utility model.

[0035] Figure 5 This is a schematic diagram of the connecting rod structure of this utility model.

[0036] Figure 6 This is a schematic diagram of the fixing rod structure of this utility model.

[0037] Figure 7 This is a schematic diagram of the crossbar structure of this utility model.

[0038] Figure 8 This is a schematic diagram of the self-locking pin structure of this utility model.

[0039] Figure 9 This is a schematic diagram of the structure of the present invention when the main pin and the inclined surface of the gravity eccentric piece are engaged.

[0040] Figure 10 This is a schematic diagram of the structure of this utility model in use.

[0041] The components are: 1. Upright pole; 2. Connecting rod; 3. Self-locking pin; 4. Base fixing rod; 5. Pipe support; 6. Fixed crossbar; 7. Movable crossbar; 8. Main pin; 9. Pin cap; 10. Secondary pin; 11. Pull ring; 12. Gravity eccentric plate; 13. Retaining ring; 14. Strip hole; 15. Triangular stiffening plate; 16. Through hole; 17. Main beam; 18. Track; 19. Trolley body. Detailed Implementation

[0042] To make the objectives, technical solutions, and advantages of this utility model clearer, the following detailed description is provided in conjunction with specific embodiments and accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the scope of the utility model.

[0043] like Figure 1-9 As shown, a plug-in safety guardrail for an electric double-girder bridge crane includes several uprights 1. The bottom end of each upright 1 is connected to a base fixing rod 4 via a connecting rod 2 and a self-locking pin 3. Several pipe supports 5 are symmetrically welded on both sides of the uprights 1. The base fixing rods 4 are linearly and evenly distributed. A crossbar is fixed to two pipe supports 5 at the same horizontal height between two adjacent uprights 1 via a self-locking pin 3. The crossbar consists of a fixed crossbar 6 and a movable crossbar 7. The movable crossbar 7 is connected to the fixed crossbar 6 via a connecting rod 2 and a self-locking pin 3.

[0044] The self-locking pin 3 includes a main pin 8, a pin cap 9, a secondary pin 10, a pull ring 11, and a gravity eccentric piece 12. The main pin 8 is cylindrical, and the pin cap 9 is circular. The pin cap 9 is located at one end of the main pin 8. One side of the pin cap 9 has an outward protrusion, and the pull ring 11 is connected to the protrusion. The other end of the main pin 8 has an elongated notch. The main pin 8 at one end of the notch has a 45-degree bevel, and the gravity eccentric piece 12 is located inside the notch. The secondary pin 10 passes through the notched end of the main pin 8 and the gravity eccentric piece 12, and the secondary pin 10 is interference-fitted onto the main pin 8.

[0045] The top of one side of the gravity eccentric piece 12 has a 45-degree slope and the bottom of the same side has an arc-shaped chamfer. The slope of the gravity eccentric piece 12 matches the slope of the main pin 8.

[0046] The connecting rod 2 is cylindrical, and a retaining ring 13 is provided in the middle part of the connecting rod 2. A through strip hole 14 is provided on the connecting rod 2 on one side of the retaining ring 13. The width of the strip hole 14 is greater than the outer diameter of the main pin 8 and less than the outer diameter of the pin cap 9.

[0047] The base fixing rod 4 is in the shape of a round tube. The inner diameter of the base fixing rod 4 is larger than the outer diameter of the connecting rod 2. Triangular rib plates 15 are welded on both sides of the base fixing rod 4. A through hole 16 is provided on the upper part of the base fixing rod 4. The diameter of the through hole 16 is the width of the strip hole 14.

[0048] The upright 1 is in the shape of a cylindrical tube, and the inner diameter of the upright 1 is the same as the inner diameter of the base fixing rod 4. The end of the connecting rod 2 away from the strip hole 14 is inserted into and welded to the bottom end of the upright 1. The end of the upright 1 with the strip hole 14 of the connecting rod 2 is inserted into the base fixing rod 4, and the strip hole 14 is connected to the through hole 16 on the base fixing rod 4. The self-locking pin 3 passes through the through hole 16 and the strip hole 14 to movably connect the upright 1 and the base fixing rod 4. The tube support 5 is U-shaped, and the opening of the U-shaped structure of the tube support 5 faces upward. A through hole 16 is opened on the top of the tube support 5, and the diameter of the through hole 16 on the tube support 5 is the same as the diameter of the through hole 16 on the base fixing rod 4.

[0049] The fixed crossbar 6 is in the shape of a round tube. The inner diameter of the fixed crossbar 6 is the same as the inner diameter of the base fixing rod 4. Both ends of the fixed crossbar 6 are provided with through holes 16. The diameter of the through holes 16 on the fixed crossbar 6 is the same as the diameter of the through holes 16 on the base fixing rod 4. The through hole 16 at one end of the fixed crossbar 6 is aligned with the through hole 16 on the tube support 5 and is connected to the self-locking pin 3.

[0050] The movable crossbar 7 is in the shape of a cylindrical tube. The inner diameter of the movable crossbar 7 is the same as that of the fixed crossbar 6. One end of the movable crossbar 7 has a through hole 16. The diameter of the through hole 16 on the movable crossbar 7 is the same as that on the fixed crossbar 6. The through hole 16 on the movable crossbar 7 is aligned with the through hole 16 on the tube support 5 and a self-locking pin 3 passes through it. The end of the connecting rod 2 away from the strip hole 14 is inserted into and welded to the end of the movable crossbar 7 away from the through hole 16. The movable crossbar 7 is inserted into the fixed crossbar 6 through the end of the connecting rod 2 with the strip hole 14. The strip hole 14 is connected to the through hole 16 on the base fixing rod 4. The self-locking pin 3 passes through the through hole 16 on the movable crossbar 7 and the strip hole 14 of the connecting rod 2 to movably connect the movable crossbar 7 and the fixed crossbar 6.

[0051] The working principle of this utility model is as follows:

[0052] like Figure 10As shown, during use, the base fixing rod 4 is welded to the main beam 17 between the track 18 and the trolley body 19. When the trolley is running normally, the upright 1, fixed crossbar 6, and movable crossbar 7 are removed. When temporary protection is needed, the end of the upright 1 with the slotted hole 14 of the connecting rod 2 is inserted into the base fixing rod 4, and a self-locking pin 3 is inserted to connect and fix it. The end of the movable crossbar 7 with the slotted hole 14 of the connecting rod 2 is inserted into the fixed crossbar 6 to form a crossbar, and a self-locking pin 3 is inserted to connect and fix it. The two ends of the crossbar are fixed to two pipe supports 5 at the same height between the upright 1 using self-locking pins 3, and then fixed with self-locking pins 3. Since each component is made in-house, it is impossible to guarantee that the dimensions are exactly the same. Therefore, the slotted hole 14 is used for buffering, allowing the components to move during connection to compensate for errors.

[0053] When designing the gravity eccentric piece 12, the hinge position of the gravity eccentric piece 12 is located slightly above the middle of the gravity eccentric piece 12. Figure 8 The inclined surface of the gravity eccentric plate 12 is the upper part of the gravity eccentric plate 12, as shown in the figure. Figure 9 As shown, the inclined surface of the gravity eccentric piece 12 engages with the inclined surface of the main pin 8, keeping the gravity eccentric piece 12 horizontal. After the self-locking pin 3 passes through the through hole 16 and the strip hole 14, as shown... Figure 8 As shown, the rotating self-locking pin 3, with its curved chamfered end, causes the gravity eccentric piece 12 to rotate downwards under its own weight, thus bringing the gravity eccentric piece 12 into a vertical position, thereby achieving self-locking. The curved chamfer of the gravity eccentric piece 12 makes it easier for it to pass through the through hole 16 and the strip hole 14.

[0054] The above embodiments are merely descriptions of preferred embodiments of the present invention and are not intended to limit the concept and scope of the present invention. Various modifications and improvements made to the technical solutions of the present invention by those skilled in the art without departing from the design concept of the present invention should fall within the protection scope of the present invention.

[0055] The technologies, shapes, and structures not described in detail in this utility model are all known technologies.

Claims

1. A plug-in safety guardrail for an electric double-girder bridge crane, characterized in that, It includes several uprights, and each upright has a base fixing rod inserted into its bottom end through a connecting rod and a self-locking pin. Several pipe supports are symmetrically welded on both sides of the uprights. The base fixing rods are linearly and evenly distributed. A crossbar is fixed to two pipe supports at the same horizontal height between two adjacent uprights through a self-locking pin. The crossbar consists of a fixed crossbar and a movable crossbar. The movable crossbar is inserted into the fixed crossbar through a connecting rod and a self-locking pin.

2. The plug-in safety guardrail for an electric double-girder bridge crane according to claim 1, characterized in that, The self-locking pin includes a main pin, a pin cap, a secondary pin, a pull ring, and a gravity eccentric piece. The main pin is cylindrical, and the pin cap is circular. The pin cap is located at one end of the main pin, and one side of the pin cap has an outward protrusion. The pull ring passes through and is connected to the protrusion. The other end of the main pin has an elongated notch. The main pin at one end of the notch has a 45-degree bevel. The gravity eccentric piece is located inside the notch. The secondary pin passes through the notched end of the main pin and the gravity eccentric piece, and the secondary pin is interference-fitted onto the main pin.

3. The plug-in safety guardrail for an electric double-girder bridge crane according to claim 2, characterized in that, The top of one side of the gravity eccentric plate has a 45-degree slope and the bottom of the same side has an arc-shaped chamfer. The slope of the gravity eccentric plate matches the slope of the kingpin.

4. The plug-in safety guardrail for an electric double-girder bridge crane according to claim 2, characterized in that, The connecting rod is cylindrical, with a retaining ring in the middle. A through-hole is provided on the connecting rod on one side of the retaining ring. The width of the through-hole is greater than the outer diameter of the main pin and less than the outer diameter of the pin cap.

5. The plug-in safety guardrail for an electric double-girder bridge crane according to claim 4, characterized in that, The base fixing rod is in the shape of a round tube, and the inner diameter of the base fixing rod is larger than the outer diameter of the connecting rod. Triangular ribs are welded on both sides of the base fixing rod, and a through hole is provided at the top of the base fixing rod. The diameter of the through hole is the width of the strip hole.

6. The plug-in safety guardrail for an electric double-girder bridge crane according to claim 5, characterized in that, The upright is in the shape of a cylindrical tube, and its inner diameter is the same as that of the base fixing rod. The end of the connecting rod away from the slotted hole is inserted into and welded to the bottom end of the upright. The end of the upright with the slotted hole is inserted into the base fixing rod through the connecting rod, and the slotted hole is connected to the through hole on the base fixing rod. The self-locking pin passes through the through hole and the slotted hole to movably connect the upright and the base fixing rod. The tube support is U-shaped, with the U-shaped structure opening facing upward. A through hole is opened on the top of the tube support, and the diameter of the through hole on the tube support is the same as the diameter of the through hole on the base fixing rod.

7. The plug-in safety guardrail for an electric double-girder bridge crane according to claim 5, characterized in that, The fixed crossbar is in the shape of a cylindrical tube. The inner diameter of the fixed crossbar is the same as the inner diameter of the base fixing rod. Both ends of the fixed crossbar are provided with through holes. The diameter of the through holes on the fixed crossbar is the same as the diameter of the through holes on the base fixing rod. The through hole at one end of the fixed crossbar is aligned with the through hole on the tube support and is connected to a self-locking pin.

8. The plug-in safety guardrail for an electric double-girder bridge crane according to claim 7, characterized in that, The movable crossbar is in the shape of a cylindrical tube, with the same inner diameter as the fixed crossbar. One end of the movable crossbar has a through hole, the diameter of which is the same as that of the fixed crossbar. The through hole on the movable crossbar is aligned with the through hole on the tube support and a self-locking pin is inserted through it. The end of the connecting rod away from the slotted hole is inserted into and welded to the end of the movable crossbar away from the through hole. The movable crossbar is inserted into the fixed crossbar through the end of the connecting rod with the slotted hole, and the slotted hole is connected to the through hole on the base fixed rod. The self-locking pin passes through the through hole on the movable crossbar and the slotted hole of the connecting rod to movably connect the movable crossbar and the fixed crossbar.

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