A hot rolling coiler and its anti-deformation pull rod adjusting device

Abstract

The utility model discloses a hot rolling coiler and anti-deformation pull rod adjusting device thereof relates to metallurgical equipment technical field, and anti-deformation pull rod adjusting device includes: pull rod mechanism, its symmetry is equipped in the both sides of the outlet guide plate of hot rolling coiler, and pull rod mechanism includes two seat of being equipped with the bottom of outlet guide plate, two opposite distribution's threaded pull rod and nut, and one end of threaded pull rod is hinged with the seat, and the other end of threaded pull rod is connected with the nut threadedly, spiral elevator is equipped below the center of outlet guide plate, and spiral elevator is used for adjusting the height of outlet guide plate. The device can solve the deformation problem of the outlet guide plate caused by the lack of both sides support in the prior art, effectively avoid the interference phenomenon between the roll surface of the lower pinch roll, and further significantly improve the stability, reliability and continuity of equipment operation.

Description

Technical Field

[0001] This utility model relates to the field of metallurgical equipment technology, and more specifically, to an anti-deformation tie rod adjustment device. Furthermore, it also relates to a hot rolling coiler including the aforementioned anti-deformation tie rod adjustment device. Background Technology

[0002] In modern hot rolling steel production processes, the hot rolling coiler is one of the core pieces of equipment ensuring the quality of finished steel products and production efficiency. The precise operation of the exit guide plate of the lower pinch roll is crucial. After the pinch roll replacement operation, the original exit guide plate mainly relies on a screw jack installed in the middle of the exit guide plate to adjust the gap between itself and the pinch roll surface, as well as provide necessary support.

[0003] However, this traditional design has inherent structural flaws. Because the screw jack is only located in the middle, the two sides of the outlet guide plate are unsupported and vulnerable. In actual production, when the outlet valve descends to its lowest position, its own weight concentrates on the two sides of the outlet guide plate. Over time and with the accumulation of production batches, deformation inevitably occurs on both sides of the outlet guide plate. Furthermore, the design gap between the outlet guide plate and the lower pinch roller is extremely narrow, only 0.8mm. Once the outlet guide plate deforms, it will quickly interfere with the surface of the lower pinch roller. This interference not only causes scratches on the surface of the lower pinch roller, affecting its surface finish and service life, but more seriously, it can easily trigger batch production accidents, causing defects in the steel surface quality, production shutdowns for maintenance, and a series of other problems, resulting in huge economic losses and production delays for the company.

[0004] In summary, how to solve the deformation problem of the outlet guide plate caused by the lack of support on both sides in the existing technology, effectively avoid interference between it and the roller surface of the lower pinch roller, and thus significantly improve the stability, reliability and production continuity of the equipment operation, is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0005] In view of this, the purpose of this utility model is to provide an anti-deformation tie rod adjustment device, which can solve the deformation problem of the outlet guide plate caused by the lack of support on both sides in the prior art, effectively avoid interference between it and the roller surface of the lower pinch roller, and thus significantly improve the stability, reliability and production continuity of the equipment operation.

[0006] In addition, another objective of this invention is to provide a hot rolling coiler that includes the aforementioned anti-deformation tie rod adjustment device.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] An anti-deformation tie rod adjustment device, comprising:

[0009] A tie rod mechanism is symmetrically arranged on both sides of the outlet guide plate of the hot rolling coiler. The tie rod mechanism includes two supports located at the bottom of the outlet guide plate, two oppositely distributed threaded tie rods, and a nut. One end of the threaded tie rod is hinged to the support, and the other end of the threaded tie rod is threaded to the nut.

[0010] A screw jack is located below the center of the outlet guide plate, and the screw jack is used to adjust the height of the outlet guide plate.

[0011] In one embodiment, the surface hardness of the threaded tie rod is HB220-270.

[0012] In one embodiment, the threaded section of the threaded tie rod is a rectangular section.

[0013] In one embodiment, the nut comprises a brass component.

[0014] In one embodiment, the inner hole of the nut is inlaid with a self-lubricating alloy layer, the coefficient of friction of which is 0.01 to 0.03.

[0015] In one embodiment, a threaded hole is provided on one side of the nut, and the threaded hole is used to screw in the anti-loosening screw to achieve secondary locking.

[0016] In one embodiment, the nut is provided with two layers of threaded holes spaced apart along the axial direction, and the threaded holes in the same layer are spaced apart along the axial direction of the nut.

[0017] In one embodiment, the threaded holes in the same layer are evenly spaced along the circumference of the nut.

[0018] In one embodiment, the support is hinged to the bottom of the guide plate via a hinge structure.

[0019] A hot-rolled coiler includes the anti-deformation tie rod adjustment device described in any one of the above claims.

[0020] When using the anti-deformation tie rod adjustment device provided by this utility model, a screw jack is installed below the center of the outlet guide plate. By controlling the operation of the screw jack, the outlet guide plate can be adjusted in height. Moreover, since tie rod mechanisms are provided on both sides of the outlet guide plate of the hot rolling coiler, the two relatively distributed threaded tie rods can lock the position of the outlet guide plate, which helps to counteract the deformation force of the outlet valve on both sides of the outlet guide plate, ensuring the long-term stability of the outlet guide plate. This keeps the gap between the outlet guide plate and the lower pinch roll within a preset range (e.g., a gap of 0.8mm), fundamentally reducing the risk of production accidents and maintenance costs caused by equipment failure.

[0021] In summary, the anti-deformation tie rod adjustment device provided by this utility model can solve the deformation problem of the outlet guide plate caused by the lack of support on both sides in the prior art, effectively avoid interference between it and the roller surface of the lower pinch roller, and thus significantly improve the stability, reliability and production continuity of the equipment.

[0022] In addition, this utility model also provides a hot rolling coiler including the above-mentioned anti-deformation tie rod adjustment device. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the exit guide plate of the lower pinch roller in the prior art;

[0025] Figure 2 This is a schematic diagram of the tie rod mechanism of the anti-deformation tie rod adjustment device provided by this utility model.

[0026] Figures 1-2 middle:

[0027] 1 is the outlet guide plate, 2 is the lower clamping roller, 3 is the screw jack, 4 is the support, 5 is the hinge structure, 6 is the threaded tie rod, 7 is the nut, and 8 is the anti-loosening screw. Detailed Implementation

[0028] 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.

[0029] The core of this invention is to provide an anti-deformation tie rod adjustment device, which can solve the deformation problem of the outlet guide plate caused by the lack of support on both sides in the prior art, effectively avoiding interference between it and the roller surface of the lower pinch roll, thereby significantly improving the stability, reliability and production continuity of the equipment. Another core aspect of this invention is to provide a hot rolling coiler including the above-mentioned anti-deformation tie rod adjustment device.

[0030] Please refer to Figure 2This specific embodiment provides an anti-deformation tie rod adjustment device, including:

[0031] The tie rod mechanism is symmetrically arranged on both sides of the outlet guide plate 1 of the hot rolling coiler. The tie rod mechanism includes two supports 4 located at the bottom of the outlet guide plate 1, two oppositely distributed threaded tie rods 6, and a nut 7. One end of the threaded tie rod 6 is hinged to the support 4, and the other end of the threaded tie rod 6 is threadedly connected to the nut 7.

[0032] The screw jack 3 is located below the center of the outlet guide plate 1 and is used to adjust the height of the outlet guide plate 1.

[0033] It should be noted that the tie rod mechanism provides auxiliary support and is installed parallel to the lifting end of the screw jack 3. In practical applications, the shape, structure, size, material, and position of the tie rod mechanism and the screw jack 3 can be determined according to the actual situation and requirements.

[0034] When using the anti-deformation tie rod adjustment device provided by this utility model, a screw jack 3 is installed below the center of the outlet guide plate 1. By controlling the operation of the screw jack 3, the outlet guide plate 1 can be adjusted in height. Moreover, since tie rod mechanisms are provided on both sides of the outlet guide plate 1 of the hot rolling coiler, two relatively distributed threaded tie rods 6 can lock the position of the outlet guide plate 1, which helps to counteract the deformation force of the outlet valve on both sides of the outlet guide plate 1, ensuring the long-term stability of the outlet guide plate 1, and keeping the gap between the outlet guide plate 1 and the lower pinch roll 2 within a preset range (such as a gap of 0.8mm), fundamentally reducing the risk of production accidents and maintenance costs caused by equipment failure.

[0035] In summary, the anti-deformation tie rod adjustment device provided by this utility model can solve the deformation problem of the outlet guide plate caused by the lack of support on both sides in the prior art, effectively avoid interference between it and the roller surface of the lower pinch roller 2, and thus significantly improve the stability, reliability and production continuity of the equipment operation.

[0036] In one embodiment, the surface hardness of the threaded tie rod 6 is HB220-270.

[0037] It should be noted that a moderate balance between strength and toughness is achieved: a surface hardness of HB220-270 is at a medium level, which meets the basic requirements for the tie rod to withstand tensile and torque forces while avoiding the risk of increased brittleness and breakage due to excessive hardness. Furthermore, the threaded tie rod 6 with a surface hardness of HB220-270 facilitates cold working operations such as cutting and tapping, reducing production difficulty and cost. It is particularly suitable for forming precision structures such as threads, and can meet general working conditions without complex surface treatments (such as chrome plating or nitriding). In other words, setting the surface hardness of the threaded tie rod 6 to HB220-270 balances mechanical strength and machinability, making it suitable for the load and assembly requirements of conventional engineering scenarios.

[0038] In one embodiment, the threaded tie rod 6 has a rectangular thread cross-section. That is, the threaded tie rod 6 has a rectangular thread, which is more impact-resistant than a regular triangular thread and possesses a certain degree of self-locking performance and dynamic load absorption capacity. The self-locking of the rectangular thread is essentially achieved by the static friction torque between the threaded pairs offsetting the external driving torque.

[0039] It should be noted that the advantages of having a rectangular thread cross-section for threaded tie rod 6 are mainly reflected in the following aspects:

[0040] 1. High-efficiency transmission

[0041] The rectangular thread has a square tooth profile (0° tooth angle), which reduces friction loss by 40%-50% compared to the 55° tooth angle of the imperial thread or the 30° trapezoidal thread (according to data from the 6th edition of the Mechanical Design Handbook). This structure enables transmission efficiency of over 90%, making it particularly suitable for applications requiring frequent forward and reverse rotation.

[0042] 2. No radial force component

[0043] Because the thread is subjected to vertical force on its side, it does not produce radial force like a V-shaped thread. This characteristic is especially important in precision instruments, as it can avoid positioning deviations caused by lateral forces.

[0044] 3. Bidirectional load balancing

[0045] The symmetrical structure of the rectangular thread ensures consistent performance when subjected to axial tensile or compressive forces.

[0046] 4. Suitable for precision control systems

[0047] In the feed system of CNC machine tools, rectangular thread pairs are used, which have high repeatability and positioning accuracy.

[0048] Therefore, it can be seen that the rectangular cross-section threaded tie rod 6 has significant advantages in terms of transmission efficiency, no radial force component, bidirectional load balance and precision control, and is suitable for engineering scenarios with high requirements for accuracy and efficiency.

[0049] In one embodiment, the nut 7 includes a brass component (copper alloy material). The brass component possesses properties such as electrical and thermal conductivity, ease of machining, and corrosion resistance, which helps to improve the service life of the device.

[0050] In one embodiment, the inner hole of the nut 7 is inlaid with a self-lubricating alloy layer. The friction coefficient of the self-lubricating alloy layer is 0.01~0.03, which significantly improves wear resistance, reduces the friction coefficient, and achieves maintenance-free operation. It is especially suitable for heavy-duty, harsh environments and scenarios where regular lubrication is not possible. During use, it is necessary to regularly check the thread wear of the threaded tie rod 6 and the corrosion of the nut 7, and to regularly replenish lubricant to the inner hole of the nut 7.

[0051] In one embodiment, a threaded hole is provided on one side of the nut 7, which is used to screw in the anti-loosening screw 8 to achieve secondary locking. By machining a threaded hole on one side of the nut 7, after both threaded rods 6 are threadedly connected to the nut 7 (with a gap between the ends of the two threaded rods 6), the anti-loosening screw 8 can be screwed into the threaded hole to perform secondary anti-loosening treatment on the device by using the anti-loosening screw 8 to lock the threaded rods 6.

[0052] In one embodiment, the nut 7 is provided with two layers of threaded holes spaced apart along the axial direction, and the threaded holes in the same layer are spaced apart along the axial direction of the nut 7.

[0053] When using this device, the height of the outlet guide plate 1 is roughly adjusted by the screw jack 3, and both threaded rods 6 are threadedly connected to the nuts 7 to strengthen the structural strength of both sides of the outlet guide plate 1. This helps to counteract the deformation force of the outlet valve on both sides of the outlet guide plate 1 and ensure the long-term stability of the outlet guide plate 1.

[0054] In one embodiment, the threaded holes in the same layer are evenly spaced along the circumference of the nut 7. For example, four threaded holes can be evenly spaced along the circumference of the nut 7 to prevent loosening by having four anti-loosening screws 8 or four bolts screwed into the threaded holes, which greatly improves the self-locking effect of the pull rod mechanism.

[0055] In one embodiment, the support 4 is hinged to the bottom of the guide plate 1 via a hinge structure 5.

[0056] This device, while retaining the original screw jack 3, innovatively adds symmetrical tie rod mechanisms on both sides of the outlet guide plate 1. This double-sided tie rod design can form a more balanced and stable support force distribution on the outlet guide plate 1, effectively making up for the deficiency of insufficient support on both sides in the original design.

[0057] Furthermore, the thread of the threaded tie rod 6 is a rectangular thread, which gives the threaded tie rod 6 an excellent self-locking function. After the position adjustment of the outlet guide plate 1 is completed, it can be firmly held in the set position by relying on the characteristics of the thread structure of the threaded tie rod 6 itself. Even if it encounters severe working conditions such as strong vibration and impact during equipment operation, it can ensure that there will be no loosening or displacement, thereby providing continuous and reliable positioning support for the outlet guide plate 1.

[0058] Furthermore, to address the unavoidable dynamic impact loads during hot rolling production, the threaded tie rod 6 with rectangular threads has been optimized in terms of material selection and structural design. This effectively absorbs and buffers this impact energy, preventing deformation or damage to the outlet guide plate 1 due to instantaneous impact forces, further enhancing the stability and reliability of the entire device. For example, the nut 7 is manufactured using high-quality copper alloy material, giving it excellent corrosion resistance. In the complex environment of the hot rolling production workshop—high temperature, humidity, and corrosive gases—the nut 7 can maintain good working condition for a long time, without rusting or corroding like ordinary metal nuts. This ensures the precision and smoothness of the fit with the threaded tie rod 6, reducing equipment failures and maintenance needs caused by corrosion of the nut 7.

[0059] Furthermore, the nut 7 itself has excellent self-lubricating properties. During its relative movement with the rectangular threaded rod, it effectively reduces the coefficient of friction between the two without the need for frequent addition of lubricant. This not only reduces the wear rate of the components and extends the service life of the threaded rod 6 and the nut 7, but also reduces the operating noise and energy consumption of the equipment, thereby improving overall operating efficiency.

[0060] To further illustrate the installation and debugging process of the anti-deformation tie rod adjustment device provided by this utility model, the following example will be given.

[0061] (a) Preparations before installation

[0062] A comprehensive inspection and cleaning of the outlet guide plate 1 of the lower pinch roll 2 of the existing hot rolling coiler and its surrounding equipment was carried out to ensure that there were no debris, oil stains or other factors that could affect the installation accuracy in the installation area.

[0063] According to the design drawings, accurately measure and mark the specific positions on both sides of the outlet guide plate 1 for installing the tie rod mechanism to ensure the accuracy and symmetry of the installation position of the tie rod mechanism.

[0064] Prepare the necessary installation tools and components, including threaded tie rods 6 and nuts 7, and conduct quality inspections on all components to ensure they meet design requirements and relevant standards.

[0065] (II) Installation process

[0066] First, following standard installation procedures, the original screw jack 3 is accurately installed in the middle position of the outlet guide plate 1, the power system and control system are connected, and preliminary debugging is carried out to ensure that it can normally achieve lifting and adjustment functions.

[0067] At the marked installation positions on both sides of the outlet guide plate 1, the tie rod mechanism is compared with its pre-installation position to confirm whether the installation dimensions meet the usage requirements.

[0068] Securely install support 4 onto the fixed structure of the equipment according to design requirements, ensuring accurate positioning and reliable fixation. During installation, use sealant for protection to prevent dust, moisture, etc., from entering the nut 7 and affecting its performance.

[0069] Connect the threaded tie rod 6 to the two side supports 4, and then secure it with the nut 7. After the nut 7 is connected, a radial threaded locking operation can be performed. During the connection process, pay attention to maintaining the parallelism of the threaded tie rod 6 to avoid tilting or jamming.

[0070] (III) Debugging and Adjustment

[0071] After the installation of the tie rod mechanism is completed, the entire outlet guide plate 1 is fully debugged. The screw jack 3 is started to adjust the outlet guide plate 1 to its initial position, and then the two sides of the outlet guide plate 1 are reinforced by the threaded tie rod 6.

[0072] The gap between the outlet guide plate 1 and the lower pinch roller 2 is precisely measured using instruments such as feeler gauges to ensure that the gap is always kept within the design range of 0.8mm.

[0073] During the commissioning process, various operating conditions in the hot rolling production process were simulated, such as equipment start-up, stop, acceleration, deceleration, and valve lifting and lowering operations. The operating status and clearance changes of the outlet guide plate 1 were observed. If any abnormalities were found, adjustments and optimizations were made in a timely manner to ensure that the entire tie rod mechanism could work stably and reliably.

[0074] (iv) Routine maintenance

[0075] Regularly inspect the pull rod mechanism visually, checking for wear, corrosion, loosening, or other defects in the threaded pull rod 6 and nut 7. If any are found, repair or replace them promptly.

[0076] The tie rod mechanism should be lubricated and maintained at regular intervals during production. Although nut 7 has self-lubricating properties, it is still necessary to apply an appropriate amount of lubricant periodically during long-term operation to further reduce frictional resistance and extend the service life of the components.

[0077] Establish comprehensive equipment operation records, detailing the time, content, and changes in relevant parameters for each adjustment and maintenance. By analyzing and summarizing this data, potential problems and malfunctions can be identified promptly, allowing for preventative measures to ensure the equipment is always in optimal operating condition.

[0078] In addition to the aforementioned anti-deformation tie rod adjustment device, this utility model also provides a hot rolling coiler that includes the anti-deformation tie rod adjustment device disclosed in the above embodiments. For the structure of other parts of the hot rolling coiler, please refer to the prior art, which will not be repeated here.

[0079] In addition, it should be noted that the orientation or positional relationship indicated by "upper" and "lower" in this application is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the purpose of simplifying the description and making it easier to understand, and is not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0080] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. Any combination of all embodiments provided by this utility model is within the protection scope of this utility model and will not be elaborated upon here.

[0081] The hot rolling coiler and its anti-deformation tie rod adjustment device provided by this utility model have been described in detail above. Specific examples have been used to illustrate the principle and implementation of this utility model. The descriptions of the embodiments above are only for the purpose of helping to understand the method and core idea of ​​this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made to this utility model without departing from the principle of this utility model, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. A deformation-resistant tie rod adjustment device, characterized in that, include: A tie rod mechanism is symmetrically arranged on both sides of the outlet guide plate (1) of the hot rolling coiler. The tie rod mechanism includes two supports (4) located at the bottom of the outlet guide plate (1), two oppositely distributed threaded tie rods (6) and a nut (7). One end of the threaded tie rod (6) is hinged to the support (4), and the other end of the threaded tie rod (6) is threaded to the nut (7). A screw jack (3) is located below the center of the outlet guide plate (1) and is used to adjust the height of the outlet guide plate (1).

2. The anti-deformation tie rod adjustment device according to claim 1, characterized in that, The surface hardness of the threaded tie rod (6) is HB220-270.

3. The anti-deformation tie rod adjustment device according to claim 1, characterized in that, The threaded section of the threaded tie rod (6) is a rectangular section.

4. The anti-deformation tie rod adjustment device according to claim 1, characterized in that, The nut (7) is made of brass.

5. The anti-deformation tie rod adjustment device according to any one of claims 1 to 4, characterized in that, The inner hole of the nut (7) is inlaid with a self-lubricating alloy layer, and the friction coefficient of the self-lubricating alloy layer is 0.01~0.

03.

6. The anti-deformation tie rod adjustment device according to any one of claims 1 to 4, characterized in that, The nut (7) has a threaded hole on one side, which is used to screw in the anti-loosening screw (8) to achieve secondary locking.

7. The anti-deformation tie rod adjustment device according to claim 6, characterized in that, The nut (7) is provided with two layers of threaded holes spaced apart along the axial direction, and the threaded holes in the same layer are spaced apart along the axial direction of the nut (7).

8. The anti-deformation tie rod adjustment device according to claim 7, characterized in that, The threaded holes in the same layer are evenly distributed along the circumference of the nut (7).

9. The anti-deformation tie rod adjustment device according to any one of claims 1 to 4, characterized in that, The support (4) is hinged to the bottom of the guide plate (1) via a hinge structure (5).

10. A hot-rolled coiling machine, characterized in that, Includes the anti-deformation tie rod adjustment device as described in any one of claims 1 to 9.

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