A device for lifting a bar with increased stability of the double strand

Abstract

The utility model discloses a kind of rod lifting devices of increasing double chain stability, including rack, driven sprocket shaft, driving sprocket shaft and roller way are arranged on it;Driven sprocket shaft and driving sprocket shaft are fixed with several groups of double sprocket tooth disc at interval, each group of double sprocket tooth disc is formed by two sprocket tooth disc, two chains are set on each double sprocket tooth disc, lifting plate is equipped on chain;Double chain tensioning mechanism is further fixed on the rack between driving sprocket shaft and driven sprocket shaft, and the double chain tensioning mechanism includes tensioning wheel shaft and telescopic power mechanism;The device uses double chain and additionally adds double chain tensioning mechanism, so that the load limit is improved, the stability of rod lifting is stronger, and the tensioning wheel shaft of chain can guarantee the tensioning of chain, can satisfy full load production demand, obviously improve chain use efficiency, improve the stability of chain use, better guarantee lifting equipment normal operation, guarantee on-site production rhythm smoothly, guarantee yield.

Description

Technical Field

[0001] This utility model relates to the field of steel rolling machinery technology, specifically to a bar lifting device that enhances the stability of double chains. Background Technology

[0002] In high-speed wire rod / bar production lines, the billet lifting chain of the heating furnace plays a crucial role in stabilizing output and billet feeding speed as a key feeding device. Currently, the commonly used single-chain lifting system, such as the sprocket lifting system for billet transport roller conveyor system proposed in Chinese Patent Publication No. CN216510810U, is still a single-chain structure and does not have a chain tensioning device.

[0003] In actual operation, chain breakage accidents frequently occur with single-chain lifting systems. This is because the weight distribution on a single chain is uneven, easily leading to localized overload and breakage. Typically, high-speed wire rod / bar production lines are built on platforms due to process requirements, and the heating furnace also needs to be located on a platform of at least 5 meters. Steel billets are transported into the heating furnace via lifting chains; this process is indispensable.

[0004] However, current usage reveals significant drawbacks to the single-chain system: frequent malfunctions increase downtime, severely impacting production rhythm and output. Repair operations involve high-altitude, cross-functional, and high-temperature work, posing significant safety hazards. Furthermore, chain replacement is labor-intensive, involves high-temperature environments, is difficult to perform, and is time-consuming, further hindering production stability. In high-frequency, accident-prone locations, maintenance personnel experience high physical exertion and low work efficiency, making it difficult to meet the needs of continuous high-speed wire rod production.

[0005] To reduce the labor intensity of employees, minimize downtime due to accidents, improve production efficiency, eliminate safety hazards during emergency repairs, and save labor costs, this application provides a double-chain stable lifting device for high-speed wire / bar heating furnaces. Utility Model Content

[0006] The technical problem to be solved by this utility model is to address the shortcomings of the existing technology by providing a double-chain stable bar lifting device that can effectively reduce the labor intensity of employees, reduce workplace safety hazards, improve work efficiency, and increase product output.

[0007] The technical problem to be solved by this utility model is achieved through the following technical solution: a bar lifting device with increased double chain stability, including a frame, on which a driven sprocket shaft, a driving sprocket shaft and a roller conveyor are arranged in sequence along the bar conveying direction, and the driving sprocket shaft and the roller conveyor are both located above the driven sprocket shaft. Several sets of double sprocket teeth are fixedly arranged at intervals on the driven sprocket shaft and the driving sprocket shaft. Each set of double sprocket teeth consists of two sprocket teeth fixed to each other with their end planes. The sprocket teeth have sprocket teeth I that cooperate with the chain. A chain arranged side by side on the left and right is connected to each double sprocket tooth. Several lifting plates for lifting the bar are fixedly arranged on the chain along the axial direction of the driven sprocket shaft and the driving sprocket shaft. A rotary power mechanism is also fixedly installed on the top of the frame, and the rotary power mechanism is connected to one end of the drive sprocket shaft. A mounting frame is also fixedly provided on the frame between the driving sprocket shaft and the driven sprocket shaft. A double-chain tensioning mechanism is installed on the mounting frame. The double-chain tensioning mechanism includes a tensioning wheel shaft and a telescopic power mechanism. The tension wheel shaft is placed inside the chain, and the outer circumferential surface of the tension wheel shaft has sprocket teeth II that cooperate with the chain; One end of the telescopic power mechanism is fixed to the frame, and the other end is hinged to the outer circumferential surface of the end of the tension wheel shaft; The telescopic power mechanism is used to drive the tension wheel shaft to move closer to or away from the chain, thereby adjusting the chain tension.

[0008] The technical problem to be solved by this utility model can also be achieved through the following technical solution: In the above-described bar lifting device for increasing the stability of the double chain, the axis of the tension wheel shaft is parallel to the axes of the driven sprocket shaft and the driving sprocket shaft.

[0009] The technical problem to be solved by this utility model can also be achieved through the following technical solution: the above-mentioned double-chain stable bar lifting device also has a pair of waist-shaped grooves on the side wall of the mounting frame. The two ends of the tension wheel shaft are placed in the waist-shaped grooves. The opening direction of the waist-shaped grooves is parallel to the extension and retraction direction of the telescopic power mechanism, so as to guide the movement of the tension wheel shaft.

[0010] The technical problem to be solved by this utility model can also be achieved through the following technical solution: the above-mentioned rod lifting device with increased double chain stability, wherein the drive sprocket shaft is composed of several short shafts, the axes of the several short shafts are parallel, the outer circumferential surface of the middle part of the short shaft is fixed to the top of the frame through a bearing seat, and the ends of two adjacent short shafts on the left and right are connected by a coupling.

[0011] The technical problem to be solved by this utility model can also be achieved through the following technical solution: the above-mentioned bar lifting device with increased double chain stability has a guide plate fixed on the frame next to the drive sprocket shaft. The top surface of the guide plate has rounded corners to guide the bar lifted to the top of the frame for dropping.

[0012] Compared with the prior art, the beneficial technical effects of this utility model are: (1) The device adopts a double chain and adds a double chain tensioning mechanism, which improves the load limit, strengthens the stability of bar lifting, and the tensioning wheel shaft of the chain can ensure the tension of the chain, meet the full load production requirements, significantly improve the chain usage efficiency, improve the stability of chain usage, better ensure the normal operation of the lifting equipment, ensure the smooth production rhythm on site, and ensure output. (2) After adopting this device; Tangible benefits: Reduced production time and increased output. After being put into use, compared to the original 2 hours of accident time, the monthly accident time will be reduced by 0.5 hours, and the work efficiency can be increased by 1.5 hours each time. Calculated based on 10 accidents per year, the loss due to frequent chain replacements caused by chain problems will be reduced by at least 0.2 chains per month. Profit = Time saved * Hourly output * Profit per ton of steel * Number of times per year + Spare parts cost ≈ 1.5 hours / time * 240 tons / hour * 100 yuan / ton * 10 times / year + 3369 yuan / piece * 0.2 pieces / month * 12 months ≈ 368,000 yuan / year Intangible benefits: Reduces safety hazards caused by high installation locations and high temperatures, reduces labor intensity, improves operational efficiency, reduces downtime for chain replacement, and increases production output. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the main structure of this utility model; Figure 2 This is a schematic diagram of the left-side structure of this utility model; Figure 3 This is a schematic diagram of the left side of the guide plate of this utility model; Figure 4 This utility model relates to a double sprocket toothed disc.

[0014] Reference numerals in the attached drawings: 1. Frame; 2. Driven sprocket shaft; 3. Driven sprocket shaft; 4. Roller conveyor; 5. Double sprocket toothed disc; 6. Chain; 7. Lifting plate; 8. Guide plate; 9. Rotary power mechanism; 10. Mounting frame; 11. Tensioner shaft; 12. Telescopic power mechanism; 13. Waist-shaped groove. Detailed Implementation

[0015] The specific technical solutions of this utility model are further described below with reference to the accompanying drawings, so as to enable those skilled in the art to further understand this utility model, without constituting a limitation on its rights.

[0016] Example 1, referring to Figure 1-4A bar lifting device for increasing double chain stability includes a frame 1, which can be formed by overlapping and welding profiles. A driven sprocket shaft 2, a driving sprocket shaft 3, and a roller conveyor 4 are sequentially arranged on the frame 1 along the bar conveying direction. The roller conveyor 4 is existing technology, so its specific structure and operating principle will not be described here. The driving sprocket shaft 3 and the roller conveyor 4 are both located above the driven sprocket shaft 2. Several sets of double sprocket teeth 5 are fixedly arranged at intervals on the driven sprocket shaft 2 and the driving sprocket shaft 3. Each set of double sprocket teeth 5 consists of two sprocket teeth fixed to each other with their end planes. It can carry two chains 6 at a time, and its load capacity is better than that of a single chain 6. The sprocket teeth have sprocket teeth I that cooperate with the chain 6. Each double sprocket tooth 5 is connected to a chain 6 arranged side by side on the left and right. Several lifting plates 7 for lifting the bar are fixed on the chain 6 along the axial direction of the driven sprocket shaft 2 and the driving sprocket shaft 3. The lifting plates 7 are formed into a roughly square plate structure. The driving sprocket shaft 3 is composed of several short shafts with parallel axes. The outer circumference of the middle part of the short shaft is fixed to the top of the frame 1 through a bearing seat. The ends of two adjacent short shafts are connected by a coupling. Each short shaft has the double sprocket teeth 5. In order to ensure that the bar stock falls into the roller conveyor 4 after being lifted to the top of the frame 1, a guide plate 8 is fixedly provided on the frame 1 next to the drive sprocket shaft 3. The guide plate 8 is formed into a roughly arc-shaped plate structure, and the top surface of the guide plate 8 has rounded corners, so as to guide the bar stock lifted to the top of the frame 1 to fall. A rotary power mechanism 9, such as a motor, is also fixedly installed on the top of the frame 1. The rotary power mechanism 9 is connected to one end of the drive sprocket shaft 3 and is used to provide rotational force to the drive sprocket shaft 3. A mounting frame 10 is also fixed on the frame 1 between the drive sprocket shaft 3 and the driven sprocket shaft 2. The mounting frame 10 is formed into a roughly square frame structure. A double-chain tensioning mechanism is installed on the mounting frame 10. The double-chain tensioning mechanism includes a tensioning wheel shaft 11 and a telescopic power mechanism 12. The telescopic power mechanism 12 can be a cylinder, an electric cylinder, or a hydraulic cylinder. A pair of waist-shaped grooves 13 are also provided on the side wall of the mounting frame 10. The length of the waist-shaped grooves 13 can be selected according to the usage requirements. The two ends of the tensioning wheel shaft 11 are placed in the waist-shaped grooves 13. The opening direction of the waist-shaped grooves 13 is parallel to the telescopic direction of the telescopic power mechanism 12, thereby guiding the movement of the tensioning wheel shaft 11. The tension wheel shaft 11 is placed inside the chain 6. The outer circumferential surface of the tension wheel shaft 11 has sprocket teeth II that cooperate with the chain 6. The axis of the tension wheel shaft 11 is parallel to the axes of the driven sprocket shaft 2 and the driving sprocket shaft 3. One end of the telescopic power mechanism 12 is fixed to the frame 1, and the other end is hinged to the outer circumferential surface of the end of the tension wheel shaft 11; The telescopic power mechanism 12 is used to drive the tension wheel shaft 11 to move closer to or away from the chain 6, thereby adjusting the tension of the chain 6. Compared with the existing bar lifting system that does not have the chain 6 tensioning function, the operation stability of this bar lifting device is higher.

[0017] The working principle of the double-chain stable bar lifting device in Example 1 is as follows: After the tension of the double chain 6 is adjusted by the double chain tensioning mechanism, the drive sprocket shaft 3 is driven to rotate by the rotary power mechanism 9. The drive sprocket shaft 3 is connected to the driven sprocket shaft 2 through the double sprocket toothed disc 5 and the chain 6, so that the chain 6 starts to transport the bar. The lifting plate 7 located on the chain 6 lifts the bar placed between the lifting plate 7 and the chain 6 from the lower part of the frame 1 to the top of the frame 1, and then slides down onto the roller conveyor 4 by its own weight through the guide plate 8, thus completing the transport of the bar.

Claims

1. A rod lifting device for enhancing double-chain stability, characterized in that: The machine includes a frame, on which a driven sprocket shaft, a driving sprocket shaft, and a roller conveyor are sequentially arranged along the bar conveying direction. The driving sprocket shaft and the roller conveyor are both located above the driven sprocket shaft. Several sets of double sprocket teeth are fixedly arranged at intervals on the driven sprocket shaft and the driving sprocket shaft. Each set of double sprocket teeth consists of two sprocket teeth fixed to each other with their end planes. The sprocket teeth have sprocket teeth I that cooperate with the chain. A chain arranged side by side on the left and right is connected to each double sprocket tooth. Several lifting plates for lifting the bar are fixedly arranged on the chain along the axial direction of the driven sprocket shaft and the driving sprocket shaft. A rotary power mechanism is also fixedly installed on the top of the frame, and the rotary power mechanism is connected to one end of the drive sprocket shaft. A mounting frame is also fixedly provided on the frame between the driving sprocket shaft and the driven sprocket shaft. A double-chain tensioning mechanism is installed on the mounting frame. The double-chain tensioning mechanism includes a tensioning wheel shaft and a telescopic power mechanism. The tension wheel shaft is placed inside the chain, and the outer circumferential surface of the tension wheel shaft has sprocket teeth II that cooperate with the chain; One end of the telescopic power mechanism is fixed to the frame, and the other end is hinged to the outer circumferential surface of the end of the tension wheel shaft; The telescopic power mechanism is used to drive the tension wheel shaft to move closer to or away from the chain, thereby adjusting the chain tension.

2. The rod lifting device for increasing double-chain stability according to claim 1, characterized in that: The axis of the tensioner shaft is parallel to the axes of the driven sprocket shaft and the driving sprocket shaft.

3. The rod lifting device for increasing double-chain stability according to claim 1, characterized in that: A pair of waist-shaped grooves are also provided on the side wall of the mounting bracket. The two ends of the tension wheel shaft are placed in the waist-shaped grooves. The opening direction of the waist-shaped grooves is parallel to the extension and retraction direction of the telescopic power mechanism, thereby guiding the movement of the tension wheel shaft.

4. The rod lifting device for increasing double-chain stability according to claim 1, characterized in that: The drive sprocket shaft is composed of several short shafts with parallel axes. The outer circumference of the middle part of the short shaft is fixed to the top of the frame by a bearing seat, and the ends of two adjacent short shafts are connected by a coupling.

5. The rod lifting device for increasing double-chain stability according to claim 1, characterized in that: A guide plate is fixed on the frame next to the drive sprocket shaft. The top surface of the guide plate has rounded corners to guide the bar stock lifted to the top of the frame for dropping.

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