Chain replacing device and method for chain type inclined elevator of annular furnace

Abstract

The invention provides a chain replacing device and protecting method for a chain type inclined elevator of an annular furnace. The chain replacing device comprises a base, a winch is fixed to a top plate of the base, and a steel wire rope of the winch is connected with a hook; a front side plate of the base is connected with a swing arm assembly and a hydraulic oil cylinder. When the chain is replaced, the hook sequentially passes through the driving chain wheel and the upper wheel edge of the driving chain wheel, descends to the ground, is bound with the first end of the chain and is gradually lifted under the action of the winch, so that the first end of the chain reaches the position above the driving chain wheel, and then the first end retracts backwards and descends; and the chain bypasses the upper rim of the driving chain wheel and is meshed with the driving chain wheel, so that the chain is driven to move under the driving of the driving chain wheel until the first end part is close to the ground, and finally, the two end parts of the chain are connected through the chain pin to finish replacement. The application of the chain replacing device is safer and more reliable for operators, meanwhile, the manpower is reduced, the maintenance time is greatly shortened, and the safety of field operation is improved.

Description

Technical Field

[0001] This invention relates to the field of elevator technology, and in particular to a chain replacement device and method for an annular furnace chain inclined elevator. Background Technology

[0002] The annular furnace is a key piece of equipment in a seamless steel pipe plant, and the chain-type inclined conveyor is the starting point of the entire seamless steel pipe production line, its main function being to transport steel billets to the annular furnace. The chain-type inclined conveyor consists of a main drive gearbox, a motor, drive and driven sprockets, a chain, and an inclined conveyor frame. The motor drives the drive sprocket via the gearbox, which in turn drives the driven sprocket through the chain, thus moving the steel billets on the chain and feeding them into the annular furnace. Because the chain of the chain-type inclined conveyor wears down over long-term operation, the chain must be replaced periodically.

[0003] like Figure 1 As shown, due to the special location of the chain-driven inclined elevator, the chain is located between two spans. The upper end of the frame 11 is fixedly connected to the end of the horizontally placed top steel frame 15, and the lower end is fixedly connected to the support pier on the ground. A drive sprocket 12 and a driven sprocket 13 are installed at the upper and lower ends respectively. The chain 14 loops around the drive and driven sprockets to form a closed loop. The chain forms a 45-degree angle with the ground, and the vertical height difference of the chain is greater than 5 meters. During maintenance, workers stand on the narrow, unguarded top steel frame, welding safety ropes to the uprights and laying and securing planks for construction. Furthermore, there are no overhead cranes available in this area. When replacing the chain, it must be manually pulled from the top platform onto the drive wheel. The construction process poses significant safety risks, is extremely physically demanding for workers, and is extremely difficult. Summary of the Invention

[0004] In view of the above-mentioned shortcomings of the prior art, the present invention provides a chain replacement device for a chain inclined elevator of an annular furnace. The chain replacement device includes a base, a winch is fixed on the top plate of the base, a wire rope is wound on the drum of the winch, and a hook is connected to the movable end of the wire rope, with the hook facing the front side of the base.

[0005] The front plate of the base is connected to a swing arm assembly and a hydraulic cylinder. The swing arm assembly can rotate up and down under the drive of the hydraulic cylinder. A drive sprocket is fixed to the end of the swing arm assembly away from the base.

[0006] The base is mounted on a horizontal top steel frame, and the swing arm assembly faces the inclined elevator located in front. The frame of the inclined elevator is in an inclined state. The upper end of the frame is fixedly connected to the end of the horizontal top steel frame, and the lower end of the frame is fixedly connected to the support on the ground. The upper and lower ends of the frame are respectively equipped with a drive sprocket and a driven sprocket.

[0007] Optionally, the hook descends to the ground sequentially through the upper rim of the drive sprocket and the driving sprocket, and is bound to the first end of the chain to be installed. Under the action of the winch, the chain is gradually lifted so that the first end of the chain reaches above the drive sprocket. Then, the first end folds back and descends, so that the chain passes around the upper rim of the drive sprocket and engages with the drive sprocket, thereby driving the chain to move under the drive of the drive sprocket until the first end approaches the ground.

[0008] Optionally, the base plate is fixed downwards with four support columns.

[0009] Optionally, the chain replacement device further includes two parallel fixing screws arranged in a left-right direction. The support column on the left side and the support column on the right side are connected by the fixing screws. A sliding rod is arranged parallel above the fixing screws, connecting the support column on the left side and the support column on the right side. A traveling wheel is installed on the sliding rod.

[0010] Optionally, the base is mounted on a horizontally placed top steel frame, the sliding rod's traveling wheel contacts the upper surface of the top steel frame, the support columns located on the left and right sides of the top steel frame are respectively arranged on the left and right sides of the top steel frame, and the fixing screw passes through the bottom of the top steel frame and connects to the support columns to lock the support columns to the top steel frame.

[0011] Optionally, a control box is fixed to the side wall of the base to control the operation of each component.

[0012] Optionally, a hydraulic station is installed on the rear side plate of the base to drive the operation of the hydraulic cylinder.

[0013] Optionally, the hoisting weight of the winch is 2000 kg and the winch length is 30 meters; the angle adjustment range of the swing arm assembly is 30°-90°.

[0014] A chain replacement method using the chain replacement device includes the following steps:

[0015] S1: Place the chain to be installed on the ground, adjacent to the frame of the inclined elevator;

[0016] S2: Hoist the chain replacement device onto the top steel frame, adjust the device so that the drive sprocket, the drive sprocket, and the winch hook are in the same straight line and directly facing the hoist frame, and fix the chain replacement device with the support column and fixing screw;

[0017] S3: Pull out 7 meters of the winch's wire rope, pass the winch's hook around the upper rim of the drive sprocket and the driving sprocket in sequence, lower it to the ground, and connect and fix it to the first end of the chain to be installed;

[0018] S4: Turn on the winch and pull the chain upwards;

[0019] S5: When the first end of the chain passes over the drive sprocket, raise the swing arm assembly to lift the drive sprocket, engage the teeth of the drive sprocket with the chain, and then start the drive sprocket motor to gradually lift the chain by rotation; then the winch hook passes around the drive sprocket, and the drive sprocket continues to rotate to lower the first end of the chain, so that the chain is lowered to a position close to the ground in a free vertical state at this end;

[0020] S6: The swing arm assembly swings down to a low position, the drive sprocket height decreases, and the new chain falls on the drive sprocket of the inclined elevator. Then the drive sprocket height continues to decrease, and the drive sprocket disengages from the chain.

[0021] S7: On the ground, the construction workers separate the winch hook and the first end of the chain, then connect the second end of the chain on the ground to the first end, and install the chain pin to complete the chain replacement.

[0022] Optionally, in step S5, the first end of the chain is lowered to a position less than 1 meter above the ground.

[0023] As described above, this invention provides a chain replacement device and method for an annular furnace chain-type inclined elevator. The application of this replacement device eliminates the need for manual pulling, significantly reducing unnecessary construction procedures and thus achieving the goal of reducing maintenance time and improving chain maintenance efficiency. It also reduces unnecessary construction, lowers risks during operation, and eliminates unnecessary safety hazards during chain replacement. Using the device and process of this invention effectively improves construction quality. Currently, this replacement device is already in use on-site. Personnel no longer need to enter the high, unguarded areas at the top of the chain to work; personnel only need to remotely adjust the special device to install the chain, greatly improving safety performance and significantly increasing construction efficiency, creating considerable economic benefits. Attached Figure Description

[0024] Figure 1 The diagram shows the structure of a chain inclined elevator for an annular furnace.

[0025] Figure 2 The diagram shown is a side view of the chain replacement device in Embodiment 1 of the present invention.

[0026] Figure 3 The diagram shown is a three-dimensional structural schematic of the chain replacement device in Embodiment 1 of the present invention.

[0027] Figure 4 The diagram shows a schematic of the chain replacement device in Embodiment 1 of the present invention mounted on a top steel frame.

[0028] Figure 5 The diagram shown is a structural schematic of the chain replacement device for lifting the chain in Embodiment 1 of the present invention.

[0029] Component designation explanation

[0030] 1. Drive sprocket; 2. Swing arm assembly; 3. Hydraulic cylinder; 4. Winch; 5. Hydraulic station; 6. Control box; 7. Base; 8. Traveling wheels; 9. Fixing screw; 11. Frame; 12. Drive sprocket; 13. Driven sprocket; 14. Chain; 15. Top steel frame. Detailed Implementation

[0031] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention.

[0032] In the detailed description of embodiments of the present invention, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged and not to scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of the present invention. In actual fabrication, the three-dimensional spatial dimensions of length, width, and depth should be included.

[0033] For ease of description, spatial relation terms such as “below,” “under,” “lower than,” “below,” “above,” and “upper” may be used herein to describe the relationship between one element or feature shown in the accompanying drawings and other elements or features. It will be understood that these spatial relation terms are intended to include directions other than those depicted in the drawings for the device in use or operation. Furthermore, when a layer is referred to as being “between” two layers, it can be the only layer between the two layers, or there may be one or more layers in between. The phrase “between” as used herein includes both endpoint values.

[0034] In the context of this application, the structure described above the first feature may include embodiments in which the first and second features are formed in direct contact, or embodiments in which additional features are formed between the first and second features, such that the first and second features may not be in direct contact.

[0035] It should be noted that the illustrations provided in this embodiment are only schematic representations of the basic concept of the present invention. Therefore, the illustrations only show the components related to the present invention and are not drawn according to the actual number, shape and size of the components in the actual implementation. In the actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0036] Example 1

[0037] like Figures 1 to 5 As shown, this embodiment provides a chain 14 replacement device for an inclined hoist of an annular furnace, comprising:

[0038] The base 7 has four support columns fixed downward on its bottom plate, and a winch 4 is fixed on its top plate. The winch 4 has a wire rope wound on its drum, and a hook is connected to the movable end of the wire rope, with the hook facing the front of the base 7.

[0039] The front side plate of the base 7 is connected to the swing arm assembly 2 and the hydraulic cylinder 3. The swing arm assembly 2 can rotate up and down under the drive of the hydraulic cylinder 3. The end of the swing arm assembly 2 away from the base 7 is fixed with a drive sprocket 1.

[0040] The base 7 is mounted on a horizontally placed top steel frame 15, and the swing arm assembly 2 faces the inclined elevator located in front. The frame 11 of the inclined elevator is in an inclined state. The upper end of the frame 11 is fixedly connected to the end of the horizontally placed top steel frame 15, and the lower end of the frame 11 is fixedly connected to the support on the ground. The upper and lower ends of the frame 11 are respectively equipped with a drive sprocket 12 and a driven sprocket 13.

[0041] The hook descends to the ground sequentially via the upper flanges of the drive sprocket 1 and the driving sprocket 12, and is secured to the first end of the chain to be installed. Under the action of the winch 4, the chain 14 is gradually lifted, as... Figure 5 As shown, the first end of the chain reaches above the drive sprocket 1, then folds back and descends, causing the chain 14 to wrap around the upper rim of the drive sprocket 1 and engage with it. Driven by the drive sprocket 1, the chain 14 moves until the first end approaches the ground, less than 1 meter away, facilitating operation. At this point, the drive sprocket 1 stops, and the hydraulic cylinder 3 lowers the swing arm assembly 2 until the chain rests on the upper rim of the drive sprocket 12 and engages with the drive sprocket 1. The drive sprocket 1 disengages from the chain 14, and the entire chain 14 replacement device is then removed. The first and second ends of the chain 14 are connected by a chain pin, completing the chain 14 installation.

[0042] Furthermore, the chain 14 replacement device also includes two parallel fixing screws 9, which are arranged in the left-right direction. The support column on the left and the support column on the right are connected by the fixing screws 9. A sliding rod is arranged parallel above the fixing screws, connecting the support column on the left and the support column on the right. A traveling wheel 8 is mounted on the sliding rod. The traveling wheel 8 is used to drag the base 7 on the top steel frame 15 in the left-right and front-back directions, so that the entire chain replacement device can be removed after the drive sprocket 1 disengages from the chain 14. After the drive sprocket 1 disengages from the chain 14, the base 7 moves in the left-right direction, causing the drive sprocket 1 to leave the vertical plane where the chain 14 is located, and then moves to the right to remove the entire chain replacement device.

[0043] The base 7 is mounted on a horizontally placed top steel frame 15. The sliding rod's traveling wheel 8 contacts the upper surface of the top steel frame 15. The support columns, located on the left and right sides of the top steel frame 15 respectively, are positioned on the left and right sides. A fixing screw passes under the top steel frame 15 and connects to the support columns to lock them in place, thereby securing the base 7 and preventing it from shaking.

[0044] Furthermore, a control box 6 is fixed to the side wall of the base 7 to control the various components, and a hydraulic station 5 is installed on the rear side plate of the base 7 to drive the operation of the hydraulic cylinder 3.

[0045] The hoisting weight of the winch 4 is 2000kg and the hoisting length is 30 meters; the angle adjustment range of the swing arm assembly 2 is 30°-90°, that is, the angle formed by the swing arm assembly 2 and the front side plate of the base 7.

[0046] Example 2

[0047] Based on the chain 14 replacement device in Embodiment 1 above, this embodiment provides a chain 14 replacement method, such as... Figure 4 , Figure 5 As shown, it includes the following steps:

[0048] S1: Place the chain 14 to be installed on the ground, adjacent to the frame 11 of the inclined elevator;

[0049] S2: Hoist the chain replacement device onto the top steel frame 15, adjust the device so that the drive sprocket 1, the drive sprocket 12, and the hook of the winch 4 are on the same straight line and directly facing the position of the hoist frame 11, and fix the chain 14 replacement device by the support column and fixing screw.

[0050] S3: Pull out about 7 meters of wire rope from winch 4, and then pass the hook of winch 4 around the upper rim of drive sprocket 1 and drive sprocket 12 in sequence and lower it to the ground, and connect and fix it to the first end of the chain 14 to be installed.

[0051] S4: Turn on the winch 4 and pull the chain 14 upward;

[0052] S5: When the first end of the chain 14 passes over the drive sprocket 1, raise the swing arm assembly 2 to lift the drive sprocket 1, and engage the teeth of the drive sprocket 1 with the chain 14. Then start the drive sprocket motor to gradually lift the chain 14 by rotation. Then, the winch 4 hook passes around the drive sprocket 12 and the drive sprocket 1 continues to rotate, lowering the first end of the chain 14. The chain 14 is lowered to a position close to the ground in a free vertical state, less than 1 meter from the ground.

[0053] S6: The swing arm assembly 2 swings down and descends to a low position, the height of the drive sprocket 1 decreases, so that the new chain 14 falls on the drive sprocket 12 of the inclined elevator equipment, and then continues to descend the height of the drive sprocket 1, and the drive sprocket 1 disengages from the chain 14.

[0054] S7: On the ground, the workers separate the hook of the winch 4 from the first end of the chain 14, then connect the second end of the chain 14 on the ground to the first end, and install the chain pin to complete the chain replacement. The process of removing the old chain is simply the reverse of the procedure for installing the new chain.

[0055] In summary, this invention provides a chain replacement device and method for a chain-type inclined elevator of an annular furnace. The chain replacement device includes a base, a winch fixed to the top plate of the base, and a hook connected to the wire rope of the winch, with the hook facing the front of the base. A swing arm assembly and a hydraulic cylinder are connected to the front plate of the base. The swing arm assembly can rotate up and down under the drive of the hydraulic cylinder, and a drive sprocket is fixed to the end of the swing arm assembly away from the base. When replacing the chain, the base is erected on a horizontally placed top steel frame, with the swing arm assembly facing the inclined elevator located at the front. The hoist lowers the hook to the ground by passing it sequentially over the upper rim of the drive sprocket and the driving sprocket. It then binds the hook to the first end of the chain to be installed. Under the action of the winch, the chain is gradually raised until the first end of the chain reaches above the drive sprocket. Then, the first end folds back and descends, allowing the chain to bypass the upper rim of the drive sprocket and engage with it. Driven by the drive sprocket, the chain moves until the first end is close to the ground. Finally, the first end of the chain hanging down is connected to the second end on the ground through a chain pin, completing the replacement.

[0056] The application of this replacement device eliminates the need for manual pulling, significantly reducing unnecessary construction procedures and thus achieving the goal of reducing maintenance time and improving chain maintenance efficiency. It also reduces unnecessary construction, lowers risks during operation, and eliminates unnecessary safety hazards when replacing chains. Using the device and process of this invention effectively improves construction quality. Currently, this replacement device is already in use on-site. Personnel no longer need to enter the top of the chain where there are no guardrails; they only need to remotely adjust the special device to install the chain. Safety performance is greatly improved, while construction efficiency is significantly increased, creating considerable economic benefits.

[0057] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. A chain replacement device for a chain-type inclined elevator of an annular furnace, characterized in that, The chain replacement device includes a base, a winch is fixed to the top plate of the base, a wire rope is wound on the drum of the winch, and a hook is connected to the movable end of the wire rope, with the hook facing the front side of the base. The front plate of the base is connected to a swing arm assembly and a hydraulic cylinder. The swing arm assembly can rotate up and down under the drive of the hydraulic cylinder. A drive sprocket is fixed to the end of the swing arm assembly away from the base. The base is mounted on a horizontal top steel frame, and the swing arm assembly faces the inclined elevator located in front. The frame of the inclined elevator is in an inclined state. The upper end of the frame is fixedly connected to the end of the horizontal top steel frame, and the lower end of the frame is fixedly connected to the support on the ground. The upper and lower ends of the frame are respectively equipped with a drive sprocket and a driven sprocket.

2. The chain replacement device according to claim 1, characterized in that: The hook descends to the ground sequentially through the upper rim of the drive sprocket and the active sprocket, and is bound to the first end of the chain to be installed. Under the action of the winch, the chain is gradually lifted so that the first end of the chain reaches above the drive sprocket. Then the first end folds back and descends, so that the chain passes around the upper rim of the drive sprocket and engages with the drive sprocket. Thus, the chain is driven by the drive sprocket to move until the first end is close to the ground.

3. The chain replacement device according to claim 1, characterized in that: The base plate is fixed downwards by four support columns.

4. The chain replacement device according to claim 3, characterized in that: The chain replacement device also includes two parallel fixing screws, which are arranged in the left-right direction. The support column on the left and the support column on the right are connected by the fixing screws. A sliding rod is arranged parallel above the fixing screws, which connects the support column on the left and the support column on the right. A traveling wheel is installed on the sliding rod.

5. The chain replacement device according to claim 4, characterized in that: The base is mounted on a horizontally placed top steel frame. The sliding rod's traveling wheel contacts the upper surface of the top steel frame. The support columns located on the left and right sides are respectively arranged on the left and right sides of the top steel frame. The fixing screw passes through the bottom of the top steel frame and connects to the support columns to lock the support columns to the top steel frame.

6. The chain replacement device according to claim 1, characterized in that: A control box is fixed to the side wall of the base to control the operation of each component.

7. The chain replacement device according to claim 1, characterized in that: A hydraulic station is installed on the rear plate of the base to drive the operation of the hydraulic cylinder.

8. The chain replacement device according to claim 1, characterized in that: The hoisting weight of the winch is 2000kg, and the winch length is 30 meters; the angle adjustment range of the swing arm assembly is 30°-90°.

9. A chain replacement method using the chain replacement device as described in any one of claims 4-8, characterized in that, Includes the following steps: S1: Place the chain to be installed on the ground, adjacent to the frame of the inclined elevator; S2: Hoist the chain replacement device onto the top steel frame, adjust the device so that the drive sprocket, the drive sprocket, and the winch hook are in the same straight line and directly facing the hoist frame, and fix the chain replacement device with the support column and fixing screw; S3: Pull out 7 meters of the winch's wire rope, pass the winch's hook around the upper rim of the drive sprocket and the driving sprocket in sequence, lower it to the ground, and connect and fix it to the first end of the chain to be installed; S4: Turn on the winch and pull the chain upwards; S5: When the first end of the chain passes over the drive sprocket, raise the swing arm assembly to lift the drive sprocket, engage the teeth of the drive sprocket with the chain, and then start the drive sprocket motor to gradually lift the chain by rotation; then the winch hook passes around the drive sprocket, and the drive sprocket continues to rotate to lower the first end of the chain, so that the chain is lowered to a position close to the ground in a free vertical state at this end; S6: The swing arm assembly swings down to a low position, the drive sprocket height decreases, and the new chain falls on the drive sprocket of the inclined elevator. Then the drive sprocket height continues to decrease, and the drive sprocket disengages from the chain. S7: On the ground, the construction workers separate the winch hook and the first end of the chain, then connect the second end of the chain on the ground to the first end, and install the chain pin to complete the chain replacement.

10. The chain replacement method according to claim 9, characterized in that: In step S5, the first end of the chain is lowered to a position less than 1 meter above the ground.

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