Supporting beam dislocation structure in walking beam type heating furnace
By designing a support beam with a dislocation structure in a stepping beam heating furnace, changing the contact parts between the slab and the movable beam and the fixed beam, the problem of black marking of the water beam is solved, and the heating time and cost are reduced.
Patent Information
- Application Number
- CN202421275711.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-05
- Publication Date
- 2025-02-25
- Estimated Expiration
- 2034-06-05
AI Technical Summary
The support beam structure of the existing stepping beam heating furnace causes the slab to produce black marks of water beams during the heating process, affecting the heating time and cost.
Design a supporting beam dislocation structure in a stepping beam heating furnace. By arranging several transposition areas along the length of the furnace body, the beam bodies in adjacent transposition areas are arranged at intervals and dislocations, changing the slab and movable beams , fix the contact parts of the beam to shorten the contact time.
By changing the contact part between the slab and the beam body, the time when the same part of the slab contacts the beam body is shortened, the generation of water beam black marks is reduced, the heating efficiency is improved, and the cost is reduced.
Smart Images
Figure CN222528291U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of heating furnaces, in particular to a staggered structure of supporting beams in a walking beam type heating furnace. Background Art
[0002] The walking beam heating furnace is a heating furnace that uses the periodic movement of the movable beam and the support of the fixed beam to realize the movement of the slab. In the walking beam heating furnace, a double-row arrangement is generally adopted. Affected by the production rhythm, the slab heating time in the furnace will not be too long, and the heating speed must be greater than the rolling speed. Therefore, under the premise of meeting the rolling force requirements, the heating time of the slab should be shortened as much as possible to save gas consumption and reduce costs. The black mark of the water beam generated during the slab heating process is an important factor restricting the slab heating time.
[0003] The black mark on the water beam is a defect caused by the pads of the movable beam and the fixed beam repeatedly contacting the slab, absorbing the heat of the slab, and causing a temperature difference on the surface of the slab. The support beams of the existing walking beam heating furnace are in a straight line from the loading end to the discharging end, and the contact position between the support beam and the slab does not change, which will cause the black mark on the water beam to deepen.
[0004] At present, there are the following methods to reduce the black mark of the water beam of the slab: 1. Bending and changing the direction of the water beam in the furnace: This technology can effectively reduce the black mark of the water beam of the slab, but it has high requirements on the length of the slab. It is generally suitable for slabs with a length greater than 6000mm, and is usually used for heating slabs for rolling coils. Because the length of the slabs used for rolling medium and thick plates is shorter, this technology is not suitable for such slabs. 2. Increasing the height of the water beam pad: It has a certain effect on reducing the black mark of the water beam, but because the pad is increased, the probability of pad damage increases. The damage of some pads will cause the slab to tilt and fall off in the furnace. 3. The water beam castable is made into a 45-degree slope: The effect of improving the black mark of the water beam is not obvious. 4. The water beam pad is replaced by a hollow pad from a solid one: The effect of improving the black mark of the water beam is not obvious, and the damage of the water beam pad is aggravated, which affects the heating effect. Utility Model Content
[0005] The utility model aims to provide a staggered structure of supporting beams in a walking beam type heating furnace to solve the problems raised in the above-mentioned prior art.
[0006] Provided is a walking beam type heating furnace support beam staggered structure, comprising:
[0007] A plurality of transposition zones are sequentially arranged along the length direction of the furnace body, the transposition zones include a plurality of beams arranged along the width direction of the furnace body, the slab is mounted on the plurality of beams, the beams include movable beams and fixed beams, and the plurality of beams between two adjacent transposition zones are arranged in an alternating pattern.
[0008] The supporting structure according to the embodiment of the utility model has at least the following technical effects: the length direction of the heating furnace is divided into several sections (depending on the number of sections of the transposition zone), and the beams in adjacent transposition zones are arranged in a staggered manner. The staggered distance depends on the length specification of the slab loaded in the heating furnace, ensuring that the center of gravity of the slab is still between the movable beam and the fixed beam after the staggered position, and the slab will not fall off. By changing the contact position between the slab in the furnace and the movable beam and the fixed beam, the contact time between the same part of the slab and the movable beam and the fixed beam is shortened, thereby shortening the time that the slab is affected by the heat taken away by the movable beam and the fixed beam, and achieving the purpose of reducing the black mark of the water beam.
[0009] Furthermore, the number of beams in two adjacent transposition zones is the same. Under this structure, when a slab is transported from one transposition zone to another, the contact position between the slab and each beam changes, causing the center of gravity of the slab to move relative to the beam. However, as long as the center of gravity of the slab is always between the movable beam and the fixed beam, the stability of the slab can be maintained. This structure can reduce the number of beams and reduce the cost of use.
[0010] Furthermore, the number of beams in two adjacent transposition zones differs by one. Although the beams in the two transposition zones under this structure are in a dislocated state, the two parts of the beams can form a symmetrical structure as a whole. When the slab is transported from one transposition zone to another, although the contact position between the slab and each beam changes, the center of gravity of the slab is still located in the middle of the beams under the action of the symmetrical structure, so that the slab always remains stable. Compared with the embodiment in which the number of beams in the two transposition zones is the same, this structure has an increased number of beams, but the specifications and length of the slab do not need to be considered during the design.
[0011] Furthermore, the number of beams in two adjacent transposition zones is four and the number of movable beams and fixed beams is the same. In the transposition zone of the eccentrically loaded slab, two movable beams are arranged on both sides of the beam. The presence of two movable beams and two fixed beams in four beams is the minimum configuration to ensure that the slab can be transported stably. When the slab is eccentrically loaded on several beams, the state stability of the slab when it is supported solely by two movable beams is weaker than the state stability when the slab is supported solely by two fixed beams. In order to make the center of gravity of the slab fall between the two movable beams and to maximize the distance from the center of gravity to the movable beams, the two movable beams are located on both sides of the several beams to improve the stability of the slab during movement.
[0012] Furthermore, two fixed beams are arranged on both sides of the beam body in the transposition zone adjacent to the transposition zone of the eccentrically loaded slab. When the slab is under axial load, the slab is in a relatively stable state regardless of whether the movable beam is located on the outside or the fixed beam is located on the outside. In addition, during the slab transportation process, the contact time with the movable beam is shorter than the contact time with the fixed beam. Therefore, when the slabs are exchanged between two adjacent transposition zones, the positions of the fixed beam and the movable beam are interchanged, which can shorten the contact time between the same part of the slab and the movable beam and the fixed beam, and reduce the probability of black marks on the water beam.
[0013] Furthermore, the number of beams in the transposition zone is at least four, and the movable beams and the fixed beams are arranged symmetrically in the arrangement direction of the beams. This arrangement takes into account both the conveying function and stability of the slab, so that the center of gravity of the slab is always at the axis of the beam, and there is no need to consider the specifications and length of the slab.
[0014] Compared with the prior art, the beneficial effects of the utility model are:
[0015] By forming a staggered structure of the beams in adjacent transposition zones, the contact point between the beams and the slabs changes as the slabs step forward in the furnace, thereby reducing the contact time between the same part of the slab and the beams. The time that the same part of the slab is affected by the heat taken away by the beams is shortened, thereby achieving the purpose of reducing the black mark of the water beam. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] 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.
[0017] Figure 1 It is a schematic diagram of the overall structure of a staggered structure of a supporting beam in a walking beam heating furnace;
[0018] Figure 2 It is a schematic diagram of the overall structure of another embodiment of the utility model.
[0019] In the figure: 1. transposition area; 2. beam body; 21. movable beam; 22. fixed beam; 3. slab. DETAILED DESCRIPTION
[0020] 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.
[0021] 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.
[0022] However, unnecessary detailed descriptions may be omitted. For example, detailed descriptions of well-known matters and repeated descriptions of substantially the same structures may be omitted. This is to avoid the following description from becoming unnecessarily lengthy and to facilitate understanding by those skilled in the art. In addition, the drawings and the following description are provided to enable those skilled in the art to fully understand the present application and are not intended to limit the subject matter described in the claims.
[0023] See also Figure 1-2 As shown, in an embodiment of the utility model, a staggered structure of supporting beams in a walking beam type heating furnace comprises a plurality of transposition zones 1 arranged in sequence along the length direction of the furnace body, the transposition zone 1 comprises a plurality of beam bodies 2 arranged along the width direction of the furnace body, a slab 3 is mounted on the plurality of beam bodies 2, the beam bodies 2 comprise movable beams 21 and fixed beams 22, and the plurality of beam bodies 2 between two adjacent transposition zones 1 are arranged in an alternating pattern.
[0024] At the half or one-third of the length direction in the furnace (depending on the number of segments of the transposition zone 1), the beams 2 in two adjacent transposition zones 1 are staggered, and the staggered distance depends on the length specification of the slabs 3 loaded in the heating furnace to ensure that after the two transposition zones 1 exchange the slabs 3, the center of gravity of the slabs 3 is still between the movable beam 21 and the fixed beam 22, and the slabs will not fall off.
[0025] In one embodiment, see Figure 1As shown, the slab 3 enters the charging end of the furnace and is located in the transposition area 1 at the charging end, and the slab 3 is placed on four beams 2. The two beams 2 in the middle are movable beams 21, and the two beams 2 on both sides are fixed beams 22. After the slab 3 is loaded into the furnace, the slab 3 has four contact points with the four beams 2. The movable beam 21 runs in a rectangular track, that is, it performs continuous actions of rising, advancing, descending, and retreating. As the movable beam 21 performs a stepping action, the position of the slab 3 moves forward.
[0026] When the movable beam 21 steps into the adjacent transposition zone 1, the movable beam 21 descends and overlaps the slab 3 onto the two fixed beams 22 in the transposition zone 1, thereby realizing the action of exchanging the slab 3 between the two transposition zones 1. The slab 3 moves to the four beam bodies 2 of the second section (or the third section) in the length direction, and the positions of the four beam bodies 2 of the second section (or the third section) are dislocated, and the positions of the fixed beams 22 and the movable beams 21 are interchanged. The two beam bodies 2 in the middle are fixed beams 22, and the two beam bodies 2 on both sides are movable beams 21. The slab 3 has four contact points with the four beam bodies 2, but the contact part on the slab 3 has changed. By dislocating the beam bodies 2 and interchanging the positions of the movable beams 21 and the fixed beams 22, the contact points between the slab 3 and the beam bodies 2 are replaced, so that the time of each contact point is shortened, and the heat absorbed by the support beam at each contact point is reduced, thereby reducing the black mark of the water beam.
[0027] In one embodiment, see Figure 2 As shown, the slab 3 enters the charging end of the furnace and is located in the transposition area 1 at the charging end, and the slab 3 is placed on five beams 2. The two sides and three middle beams 2 are movable beams 21, and the remaining two beams 2 are fixed beams 22. After the slab 3 is loaded into the furnace, the slab 3 has five contact points with the five beams 2. The movable beam 21 runs in a rectangular track, that is, it performs continuous actions of rising, advancing, descending, and retreating. As the movable beam 21 performs a stepping action, the position of the slab 3 moves forward.
[0028] When the movable beam 21 steps into the adjacent transposition zone 1, the movable beam 21 descends and overlaps the slab 3 onto the two fixed beams 22 in the transposition zone 1, thereby realizing the action of exchanging the slab 3 between the two transposition zones 1. The slab 3 moves to the four beam bodies 2 of the second section (or the third section) in the length direction. Two of the movable beams 21 can be arranged on the outside or inside of the beam body 2, depending on the specific situation. The slab 3 has four contact points with the four beam bodies 2, and the contact part on the slab 3 has changed. By dislocating the beam body 2, the contact point between the slab 3 and the beam body 2 is replaced, so that the time of each contact point is shortened, and the heat absorbed by the support beam at each contact point is reduced, thereby reducing the black mark of the water beam.
[0029] In order to achieve the dislocation of the beam body 2, the water seal skirt and the water seal groove at the bottom of the furnace need to change with the movement of the movable beam 21. In the existing design, there is a water seal groove from the loading end to the discharging end under each movable beam 21. After the beam body 2 is dislocated and the movable beam 21 and the fixed beam 22 are interchanged, the water seal groove needs to be designed in two sections from the loading end to the discharging end, separated at the side shift position, and the tail ends of the two sections of the water seal groove are respectively provided with slag outlets.
[0030] It should be noted that the present application is not limited to the above-mentioned embodiments. The above-mentioned embodiments are only examples, and the embodiments having the same structure as the technical idea and exerting the same effect within the scope of the technical solution of the present application are all included in the technical scope of the present application. In addition, without departing from the scope of the main purpose of the present application, various modifications that can be thought of by those skilled in the art to the embodiments and other methods of combining some of the constituent elements in the embodiments are also included in the scope of the present application.
Claims
1. A staggered structure of supporting beams in a walking beam heating furnace, characterized in that: include: A plurality of transposition zones (1) are sequentially arranged along the length direction of the furnace body, the transposition zones (1) comprising a plurality of beams (2) arranged along the width direction of the furnace body, slabs (3) are mounted on the plurality of beams (2), the beams (2) comprising movable beams (21) and fixed beams (22), and the plurality of beams (2) between two adjacent transposition zones (1) are arranged in an alternating pattern.
2. The staggered structure of supporting beams in a walking beam heating furnace according to claim 1, characterized in that: The number of beam bodies (2) in two adjacent transposition zones (1) is the same.
3. The staggered support beam structure in a walking beam heating furnace according to claim 1, characterized in that: The number of beam bodies (2) in two adjacent transposition zones (1) differs by one.
4. The staggered structure of supporting beams in a walking beam heating furnace according to claim 2, characterized in that: The number of beam bodies (2) in two adjacent transposition zones (1) is four and the number of movable beams (21) and fixed beams (22) arranged is the same. In the transposition zone (1) of the eccentrically loaded slab (3), two movable beams (21) are arranged on both sides of the beam body (2).
5. The staggered support beam structure in a walking beam heating furnace according to claim 4, characterized in that: Two fixed beams (22) in the transposition area (1) adjacent to the transposition area (1) of the eccentrically loaded slab (3) are arranged on both sides of the beam body (2).
6. The staggered support beam structure in a walking beam heating furnace according to claim 3, characterized in that: The number of beam bodies (2) in the transposition zone (1) is at least four, and the movable beams (21) and the fixed beams (22) are symmetrically arranged in the arrangement direction of the beam bodies (2).