Scratch-proof walking beam tooth-shaped structure with low tooth peak and low arc surface
By designing the stepping beam tooth shape of low-tooth peak, low-arc surface and rectangular frame structure, the problems of scratches and thermal bending deformation of steel pipes during transportation in the heating furnace are solved, and the safe transportation of steel pipes and the long-term and stable operation of equipment are achieved.
Patent Information
- Application Number
- CN202422200586.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-09
- Publication Date
- 2025-06-20
- Estimated Expiration
- 2034-09-09
AI Technical Summary
In existing heating furnaces, hard friction between the steel pipes and the tooth tips of the metal beams during transportation causes scratches on the surface of the steel pipes, and unbalanced thermal stress leads to bending and deformation, increasing the risk of scratches.
A stepping beam tooth-shaped structure with low tooth peaks and low arc surfaces is designed to prevent scratches. By defining the curvature radius of the tooth-front, the tooth-front is smoother, reducing hard friction, and enhancing bending resistance through rectangular frame structure and chamfer design, ensuring that the steel pipe can fully rotate during transportation to balance thermal stress.
It effectively avoids sharp contact between the steel pipe and the tooth tips of the metal beam, reduces the risk of scratches, and reduces thermal bending deformation through uniform rotation, improving the transportation safety of the steel pipe and the service life of the equipment.
Smart Images
Figure CN223005302U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of heating furnaces, and specifically relates to a walking beam tooth profile structure with low tooth peaks and low arc surfaces to prevent scratching. Background Technique
[0002] In a walking beam type heating furnace, a walking metal beam is used to support steel pipes for in-furnace transportation. Usually, cold state / normal temperature pipes (or low-temperature pipes) enter the furnace through the feed-side furnace door and are sequentially transported in a cyclic stepping manner from the first station of the walking metal beam to the last station of the walking metal beam before discharging. During each transportation and transmission process of the walking metal beam, the steel pipe will have two rigid contacts with the walking metal beam, with the moving beam rising and falling once each.
[0003] For the transportation of steel pipes in the heating furnace, in order to produce a limiting effect to prevent the steel pipes from rolling on the walking beam, the top surface of the walking beam is designed as a tooth surface with tooth peaks and tooth valleys. Each time the steel pipe makes a rigid contact with the upward protruding beam teeth, it will have a friction with the beam teeth on the outer surface. In this high-frequency contact process, if there are factors such as rough tooth surface, steel sticking, tooth surface deformation, or contact point displacement of the beam, it will cause serious scratching quality accidents to the outer surface of the steel pipe.
[0004] To solve the problem of scratching on the surface of the steel pipe, it is necessary to start from solving the hard friction between the steel pipe and the metal beam, and avoid the vertical contact impact between the tooth tips of the metal beam and the steel pipe. At present, one consideration for weakening the impact effect is to increase the translation distance of the steel pipe during a single transportation. By extending the translation distance, the vertical falling point of the steel pipe is made to avoid the tooth peak part and the falling point is located behind the tooth peak. This method can play a role in avoiding the peak, but excessive adjustment will cause the steel pipe to not be able to generate sufficient natural rotation after falling onto the tooth surface. Due to the action of thermal stress, the cold steel pipe will naturally undergo thermal bending deformation in the full-length direction after entering the hot furnace, and it is necessary to rotate on the tooth surface to balance the thermal stress. When the rotation angle of the steel pipe is insufficient, the unbalanced thermal stress will cause the steel pipe to have arc bending deformation, and the deformed steel pipe is more likely to contact the tooth tips of the metal beam, thus entering a vicious cycle of scratching accidents. Content of the Utility Model
[0005] The purpose of the utility model is to provide a walking beam tooth profile structure with low tooth peaks and low arc surfaces to prevent scratching, so as to solve the problems mentioned in the above-mentioned prior art.
[0006] A walking beam tooth profile structure with low tooth peaks and low arc surfaces to prevent scratching is provided, including:
[0007] A beam tooth surface, which includes several continuously formed tooth peaks and tooth valleys. Limited by the two ends of the tooth peak, the curvature radius of any point on the arc segment of the tooth peak is within 65 mm to 105 mm.
[0008] Further, with the two ends of the tooth valley as the limits, the radius of curvature at any point on the arc segment of the tooth valley is within 180 mm to 240 mm. This range provides a sufficient concave limiting surface for the steel pipe to prevent the steel pipe from rolling extensively after entering the tooth valley.
[0009] Further, with the two ends of the tooth valley as the limits, the radius of curvature at any point on the arc segment of the tooth valley is within 200 mm to 220 mm.
[0010] Further, the radius of curvature at any point on the arc segment of the tooth tip is within 80 mm to 90 mm. This range of the radius of curvature takes into account the smoothness of the tooth tip and ensures that the steel pipe has sufficient rotation angle.
[0011] Further, it further includes a beam seat, and the beam tooth surface forms a convex tooth end at the end position of the beam seat. The tooth end is located at the end of the beam tooth surface to limit the steel pipe.
[0012] Further, the radius of curvature at any point on the arc segment of the tooth end is within 20 mm to 30 mm. The arc chamfer of the tooth end is used to prevent scratching the surface of the steel pipe when the tooth end contacts the steel pipe.
[0013] Further, the projection of the beam body composed of the beam tooth surface and the beam seat on the radial plane is in a rectangular frame structure. Replacing the original I-shaped cross-section with a rectangular cross-section can improve the overall bending resistance of the beam body and the local bending resistance on both sides of the beam tooth surface.
[0014] Further, chamfers are formed at the connecting parts of both sides of the beam body and both sides of the beam seat on both sides of the beam tooth surface. To avoid scratching the surface of the steel pipe by the sharp parts on both sides of the beam tooth surface.
[0015] Further, a plurality of through grooves are opened along the length direction on the side wall of the beam seat. The setting of the through grooves can reduce the material consumption of the steel of the beam body and the overall weight of the beam body while ensuring the overall structural strength of the beam body.
[0016] Further, a plurality of the through grooves are arranged oppositely to the corresponding tooth tips in the length direction of the beam seat. The positions of the through grooves avoid the tooth valley part, which can prevent deformation caused by the weak structure of the tooth valley part after bearing the steel pipe.
[0017] Compared with the prior art, the beneficial effects of the present utility model are as follows:
[0018] By limiting the curvature radius of the tooth tip, the sharpness of the tooth tip is weakened, making the tooth tip smoother while meeting the limit function, and avoiding sharp contact between the steel pipe and the metal beam tooth tip when the steel pipe descends vertically without increasing the translation stroke. In addition, the smooth surface can reduce the friction component between the tooth tip and the steel pipe, avoiding hard friction between the two, and allowing the steel pipe to fully roll between the tooth tip and the tooth valley to prevent scratches while subjecting the steel pipe to uniform thermal stress and avoid bending and deformation of the steel pipe. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] In order to more clearly illustrate the embodiments of the present drawings or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present drawings. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.
[0020] Figure 1 It is a schematic diagram of the overall structure of a walking beam tooth structure with low tooth peak and low arc surface and anti-scratch;
[0021] Figure 2 for Figure 1 Schematic diagram of the cross section of AA.
[0022] In the figure: 1, beam tooth surface; 11, tooth edge; 12, tooth valley; 13, tooth end; 2, beam seat; 21, through groove; 3, chamfer. DETAILED DESCRIPTION
[0023] In order to make the purpose, technical solutions and advantages of the present application clearer, the present application is described and illustrated below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not intended to limit the present application. Based on the embodiments provided in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present application.
[0024] Obviously, the drawings described below are only some examples or embodiments of the present application. For ordinary technicians in this field, the present application can also be applied to other similar scenarios based on these drawings without creative work. In addition, it can also be understood that although the efforts made in this development process may be complicated and lengthy, for ordinary technicians in this field related to the content disclosed in this application, some changes in design, manufacturing or production based on the technical content disclosed in this application are just conventional technical means, and should not be understood as insufficient content disclosed in this application.
[0025] However, there are cases where unnecessary detailed descriptions are omitted. For example, there are cases where detailed descriptions of well-known matters and repeated descriptions of actually identical structures are omitted. This is to avoid the following descriptions from becoming unnecessarily lengthy and to facilitate the understanding of those skilled in the art. In addition, the accompanying drawings and the following descriptions are provided for those skilled in the art to fully understand the present application and are not intended to limit the subject matter recited in the claims.
[0026] Please refer to Figure 1 As shown, in an embodiment of the present utility model, a stepped beam tooth profile structure with low tooth peaks and low arc surfaces for preventing scratching includes a beam tooth surface 1. The beam tooth surface 1 includes a plurality of continuously formed tooth peaks 11 and tooth valleys 12. Limited by the two ends of the tooth peak 11, the radius of curvature at any point on the arc segment of the tooth peak 11 is within 65 mm to 105 mm.
[0027] When improving the stepped beam, it is necessary to maintain the tooth pitch (the distance between the tips of two tooth peaks 11) of the stepped beam unchanged. In this application, a stepped beam with a tooth pitch of 300 mm is taken as an example to design the maximum load-bearing outer diameter of the steel pipe When the radius of curvature of the tooth peak 11 changes, in order to ensure that the tooth valley 12 has sufficient bearing length, the length ratio between the tooth peak 11 and the tooth valley 12 tends to remain unchanged. Therefore, when the overall radius of curvature of the tooth peak 11 increases, the height of the tooth peak 11 on the beam body will decrease; when the overall radius of curvature of the tooth peak 11 decreases, the height of the tooth peak 11 on the beam body will increase.
[0028] When the radius of curvature of the tooth peak 11 is less than 65 mm, the tooth peak 11 is too sharp, and when the steel pipe contacts the tip of the tooth peak 11, the risk of scratching will increase. In addition, the component of the gravity of the steel pipe on the inclined surface of the tooth peak 11 is much greater than the frictional resistance, and the gravitational acceleration of the steel pipe is too large, causing the steel pipe to drop rapidly and unable to complete sufficient rotational movement on the inclined surface of the tooth peak 11, resulting in sliding friction between the steel pipe and the tooth peak 11, and further causing the steel pipe to be scratched. When the radius of curvature of the tooth peak 11 is greater than 105 mm, the tooth peak 11 tends to be flat. Although the steel pipe can complete sufficient rotational movement on the tooth peak 11, due to the decrease in the height of the tooth peak 11, the limiting ability of the tooth peak 11 will decrease. After improvement, the tooth peak 11 does not affect the normal load-bearing operation of the steel pipe and the anti-bending rotational rolling of the steel pipe on the beam tooth surface 1 at all.
[0029] Furthermore, the radius of curvature at any point on the arc segment of the tooth peak 11 is within 80 mm to 90 mm. This range of the radius of curvature is a preferred range, which can ensure that the steel pipe has sufficient rotation angle on the tooth peak 11, and the tooth peak 11 has sufficient height to limit the steel pipe to maintain the stability during the transportation of the steel pipe.
[0030] Limited by the two ends of the tooth valley 12, the radius of curvature at any point on the arc segment of the tooth valley 12 is within 180 mm to 240 mm. This range of the radius of curvature is to adapt to the sizes of the main types of steel pipes and ensure that the steel pipes can be in full contact with the tooth valley 12. When the overall radius of curvature of the tooth valley 12 is above 180 mm, it is ensured that large-diameter steel pipes can contact the bottom of the tooth valley 12, preventing local loads from being generated when the large-diameter steel pipes are carried on the tooth crests 11 at both ends. The overall radius of curvature of the tooth valley 12 is below 240 mm to prevent the tooth valley 12 from being too gentle and having insufficient contact surface with the steel pipes, resulting in the steel pipes being prone to rolling on the surface of the tooth valley 12.
[0031] The overall walking beam body is composed of the beam seat 2 and the beam tooth surface 1. The beam tooth surface 1 forms a convex tooth end 13 at the end position of the beam seat 2. The tooth end 13 forms a limiting structure at the end of the beam body to prevent the steel pipes from rolling down. The radius of curvature at any point on the arc segment of the tooth end 13 is within 20 mm to 30 mm. The rounded chamfer of the tooth end 13 can prevent the tooth end 13 from scratching the surface of the steel pipe when contacting the steel pipe and enable the tooth end 13 to have sufficient height to form a limiting function for the steel pipe.
[0032] The original walking beam bodies mostly used I-beam structures. However, the top flange part and the web structure of the I-beam are relatively weak and are prone to local deformation under the impact of the steel pipes, and then local protrusions are formed to scratch the steel pipes. Therefore, changing the cross-sectional shape of the beam body to a rectangular frame structure can enhance the bearing capacity and anti-deformation ability on both sides of the beam tooth surface 1 and improve the bending strength of the beam body in a neat manner, avoiding local deformation at each part and thus sharp contact points.
[0033] Please refer to Figure 1 and Figure 2 As shown, chamfers 3 are formed at the connecting parts on both sides of the beam tooth surface 1 and the beam seat 2 of the beam body. When the steel pipes have arc changes, the point contact between the bent steel pipes and the edges on both sides of the beam tooth surface 1 is changed to arc surface contact, further reducing the risk of scratching the steel pipes.
[0034] A number of through grooves 21 are provided along the length direction on the side wall of the beam seat 2. Since the beam body is changed from an I-beam structure to a rectangular frame structure, which is equivalent to adding a web plate on the basis of the original I-beam, the through grooves 21 can reduce the consumption of steel plates and the weight of the beam body by opening the through grooves 21, reducing the manufacturing cost and the use cost of the beam body.
[0035] A number of through grooves 21 are arranged oppositely to the corresponding tooth crests 11 in the length direction of the beam seat 2. Since the tooth valley 12 is at a low position, the position of the through grooves 21 avoids the tooth valley 12 part, which can prevent deformation from occurring due to the weak structure of the tooth valley 12 part when carrying the steel pipes. And the tooth crest 11 is at a high position, and there is sufficient sectional moment of inertia between the tooth crest 11 and the through grooves 21 to resist the bending moment action brought by the steel pipes.
[0036] It should be noted that this application is not limited to the above-mentioned embodiments. The above-mentioned embodiments are only examples, and embodiments with the same composition and the same effect as the technical idea within the scope of the technical solution of this application are included in the technical scope of this application. In addition, within the scope of not departing from the gist of this application, various modifications that can be conceived by those skilled in the art to the embodiments, and other ways constructed by combining some of the constituent elements in the embodiments are also included in the scope of this application.
Claims
1. A low-crest, low-arc, scratch-resistant walking beam tooth structure, characterized in that: include: The beam tooth surface (1) comprises a plurality of continuously formed tooth edges (11) and tooth valleys (12). The curvature radius of the tooth edge (11) at any point on the arc segment is within a range of 65 mm to 105 mm, limited to the two ends of the tooth edge (11).
2. The low-crest, low-arc, scratch-resistant walking beam tooth structure according to claim 1, characterized in that: With the two ends of the tooth valley (12) as the limit, the radius of curvature of any point on the arc segment of the tooth valley (12) is within a range of 180 mm to 240 mm.
3. The low-crest, low-arc, scratch-resistant walking beam tooth structure according to claim 1, characterized in that: The curvature radius of the tooth edge (11) at any point on the arc segment is within a range of 80 mm to 90 mm.
4. The low-crest, low-arc, scratch-resistant walking beam tooth structure according to claim 1, characterized in that: It also comprises a beam seat (2), wherein the beam tooth surface (1) forms an upwardly convex tooth end (13) at the end position of the beam seat (2).
5. The low-crest, low-arc, scratch-resistant walking beam tooth structure according to claim 4, characterized in that: The curvature radius of the tooth end (13) at any point on the arc segment is within a range of 20 mm to 30 mm.
6. The low-crest, low-arc, scratch-resistant walking beam tooth structure according to claim 4, characterized in that: The projection of the beam body composed of the beam tooth surface (1) and the beam seat (2) on the radial plane presents a rectangular frame structure.
7. The low-crest, low-arc, scratch-resistant walking beam tooth structure according to claim 6, characterized in that: The beam body forms chamfers (3) at the connection positions on both sides of the beam tooth surface (1) and the beam seat (2).
8. The low-crest, low-arc, scratch-resistant walking beam tooth structure according to claim 6, characterized in that: The side wall of the beam seat (2) is provided with a plurality of through slots (21) along the length direction.
9. The low-crest, low-arc, scratch-resistant walking beam tooth structure according to claim 8, characterized in that: A plurality of through grooves (21) are arranged opposite to corresponding tooth edges (11) in the length direction of the beam seat (2).