Expansion joint vault structure and drying furnace
By adopting split design and expansion joint technology in the drying furnace vault structure, the problem of easy damage in the existing drying furnace vault structure during thermal expansion and contraction is solved, and the adaptability of the vault structure and its effect are realized.
Patent Information
- Application Number
- CN202421571476.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-04
- Publication Date
- 2025-06-27
- Estimated Expiration
- 2034-07-04
AI Technical Summary
The existing drying furnace vault structure is prone to deformation when it heats up or cools too quickly, resulting in damage and high maintenance costs, and it is difficult to adapt to the rectangular furnace body.
The split vault structure is adopted, and the top and side expansion joints are added through the overlapping design of the middle vault and the two side vaults, and the adaptive ability of thermal expansion and contraction is achieved by using butyl rubber or aluminum silicate cotton materials.
This design makes the drying furnace vault structure adaptive to thermal expansion and contraction, avoiding damage caused by excessive extrusion, and is suitable for rectangular furnace bodies and greatly extends the life of the furnace body.
Smart Images
Figure CN223036840U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of drying furnace structures, in particular to a telescopic joint arch roof structure and a drying furnace. Background Art
[0002] The main work of a sintering plant is to prepare clinker that meets the requirements of blast furnace ironmaking. In its process, a drying furnace is used in the raw material pretreatment stage to dry the raw materials and control the humidity.
[0003] The furnace body of the drying furnace is used to place the raw materials to be dried, mainly including two types: circular and rectangular. The furnace body is also combined with a heating system, an air circulation system, and a control system. The heating system sends high-temperature gas into the furnace body to dry the raw materials, the air circulation system sends air inward to achieve uniform drying, and the control system monitors the drying process through sensors on the one hand and adjusts the operation of the heating system and the air circulation system on the other hand.
[0004] Among them, the top of the furnace body is usually an integral arch roof structure, which is more stable. The defect is that it cannot cope with too fast heating or cooling, and it is easy to deform under such circumstances. After long-term operation, it is easy to be damaged, resulting in relatively high maintenance costs and even causing safety accidents.
[0005] The prior art mainly adjusts the pressure in the furnace through two methods: pressure relief control and ventilation volume adjustment. The former usually sets a pressure relief valve on the side wall of the furnace body and directly relieves pressure by opening and closing it through the control system. The latter adjusts by changing the flow rate and direction of the gas in the furnace. Increasing the ventilation volume can reduce the pressure in the furnace, and reducing the ventilation volume can increase the pressure in the furnace. In these two solutions, the former has higher requirements for the sealing performance of each part of the drying furnace, the stability performance of the equipment, the accuracy and reaction speed of the control system. The latter has high energy consumption and limited adjustment accuracy. Our company improves from the furnace body structure so that the arch roof structure of the circular furnace body can adapt to a certain degree of thermal expansion and contraction without damage, but it is not applicable to the rectangular furnace body.
[0006] Therefore, it is necessary to improve the prior art. Content of the Utility Model
[0007] The utility model provides a telescopic joint arch roof structure and a drying furnace to solve the above problems.
[0008] One technical solution adopted by the utility model is: to provide a telescopic joint arch roof structure, which is composed of three sequentially connected split arch roofs, namely a middle arch roof and two side arch roofs;
[0009] The left and right side edges of the middle arch roof overlap on the edges of the two side arch roofs, and a top telescopic joint is arranged at the overlapping part, so that there is a gap for thermal expansion and contraction between the split structures.
[0010] Furthermore, the left and right side edges of the middle vault have protruding upper overlapping segments, and the corresponding edges of the side vaults have protruding lower overlapping segments. When the two overlap, the top expansion joint is filled.
[0011] Furthermore, the top expansion joint is made of butyl rubber or aluminosilicate wool, which has good high-temperature resistance and flexibility.
[0012] Another technical solution adopted by the present utility model is: to provide a drying furnace, comprising: the above-mentioned vault structure and furnace wall;
[0013] The left and right side edges of the vault structure are fixedly connected to the furnace wall, and the front and rear side edges are embedded in the furnace wall. A side expansion joint is provided at the embedded connection, so that there is a gap for thermal expansion and contraction between the vault structure and the furnace wall.
[0014] Furthermore, the front and rear side edges of the vault structure have embedded segments, and the corresponding edges of the furnace wall have embedded grooves. When the two are embedded and connected, the side expansion joint is filled.
[0015] Furthermore, a limiting structure is also provided at the position where the middle vault is embedded in the furnace wall to limit the upward movement space of the middle vault.
[0016] Furthermore, the limiting structure includes an upper connecting member and a lower connecting member. The upper connecting member has a limiting rod, and the lower connecting member has a waist-shaped hole for accommodating the limiting rod.
[0017] The beneficial effects of the expansion joint vault structure and the drying furnace of the present utility model are:
[0018] 1. The integral drying furnace vault structure is improved to a split structure, and expansion joints are added between the split structures and between the split structure and the furnace wall, so that the vault structure has the ability to adapt to thermal expansion and contraction and will not be damaged due to excessive extrusion. Description of the Drawings
[0019] Figure 1 is a top view of an expansion joint vault structure according to the first embodiment of the present utility model;
[0020] Figure 2 is Figure 1 the A-A cross-sectional view of
[0021] Figure 3 is a schematic diagram of the connection between the vault structure and the furnace wall in the first embodiment of the present utility model;
[0022] Figure 4 is a schematic diagram of the limiting structure in the first embodiment of the present utility model;
[0023] The markings of the components in the attached drawings are as follows: 1. Intermediate vault, 2. Side vault, 3. Furnace wall, 4. Top expansion joint, 5. Side expansion joint, 11. Upper overlapping section, 12. Upper connecting piece, 21. Lower overlapping section, 31. Lower connecting piece. Detailed implementation mode
[0024] The following elaborates on the preferred embodiments of the present utility model in conjunction with the attached drawings, so that the advantages and features of the present utility model can be more easily understood by those skilled in the art, thereby making the protection scope of the present utility model more clearly defined.
[0025] In the description of the present utility model, it should be understood that the orientation or positional relationships indicated by the terms "upper", "lower", "left", "right", "front", "rear", "horizontal", "vertical", "inner", "outer", etc. are based on the orientation or positional relationships shown in the attached drawings. These are only for the convenience of describing the present utility model and cannot indicate or imply that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation of the present utility model.
[0026] Please refer to Figures 1 to 4 , the first embodiment of the present utility model provides a telescopic joint vault structure, which is composed of three sequentially connected split vaults. The intermediate vault 1 is in the middle, and the side vaults 2 are on both sides. The coverage area of the intermediate vault 1 is one-third (not exceeding half) of the entire vault structure;
[0027] The left and right side edges of the intermediate vault 1 have protruding upper overlapping sections 11, and the corresponding edges of the side vaults 2 have protruding lower overlapping sections 21. When the two overlap, the top expansion joint 4 is filled. The width of the top expansion joint 4 is 3 mm (not less than 2 mm), so that there is a gap for thermal expansion and contraction between the split structures;
[0028] The top expansion joint 4 is made of aluminosilicate cotton material. While having excellent high-temperature resistance performance, it also has good heat insulation performance and certain flexibility, and is very suitable for filling the expansion joints of the drying furnace vault structure, and can maintain the stability of the expansion joints.
[0029] Another technical solution adopted by the present utility model is: to provide a drying furnace, including: the above vault structure and the furnace wall 3;
[0030] The left and right side edges of the vault structure are fixedly connected to the furnace wall 3, and the front and rear side edges are embeddedly connected to the furnace wall 3. The front and rear side edges have embedded sections, and the corresponding edges of the furnace wall 3 have embedded grooves. When the two are embeddedly connected, the side expansion joint 5 is filled. The width of the side expansion joint 5 is within 3 mm, so that there is a gap for thermal expansion and contraction between the vault structure and the furnace wall 3;
[0031] When the pressure inside the furnace body rises, the arch structure will be stressed and expand slightly outwards. This expansion is mainly concentrated in the middle arch 1 area. After extending to the left and right sides, the deformation amplitude is extremely small.
[0032] Specifically, in the area where the middle arch 1 is embedded and connected to the furnace wall 3, the width of the side expansion joint 5 is 3 mm. In the area where the side arch 2 is embedded and connected to the furnace wall 3, the width of the side expansion joint 5 changes. As it approaches the middle arch 1, the width of the side expansion joint 5 increases to 3 mm. As it moves away from the middle arch 1, the width of the side expansion joint 5 gradually decreases.
[0033] To increase the stability of the arch structure, especially the stability of the middle arch 1, a plurality of limiting structures are also provided at the position where the middle arch 1 is embedded and connected to the furnace wall 3 to limit the upward movement space of the middle arch 1:
[0034] The limiting structure includes an upper connecting member 12 and a lower connecting member 31;
[0035] The upper connecting member 12 is installed on the side of the middle arch 1 and has a limiting rod. The lower connecting member 31 is installed on the side of the furnace wall 3 and has a waist-shaped hole for accommodating the limiting rod, enabling the limiting rod to move slightly in the vertical direction, and the movement range adapts to the expansion and contraction space of the expansion joint.
[0036] In the second embodiment of the present invention, only the connection method between the front and rear edges of the arch structure and the furnace wall 3 is changed, from embedded connection to lapped connection:
[0037] The front and rear edges of the arch structure have protruding inner lapping segments, and the corresponding edges of the furnace wall 3 have protruding outer lapping segments. When the two are lapped, the side expansion joint 5 is filled;
[0038] The rest of the design is the same as that of the first embodiment.
[0039] The beneficial effects of a kind of expansion joint arch structure and drying furnace of the present invention are:
[0040] 1. Improve the integral drying furnace arch structure into a split structure, and add expansion joints between the split structures and between the split structures and the furnace wall, so that the arch structure has the self-adaptive ability of thermal expansion and contraction, and will not be damaged due to excessive extrusion, and is applicable to rectangular furnace bodies;
[0041] 2. Fix the left and right sides of the arch structure to the furnace wall, and at the same time add a limiting structure to limit the movement space of the middle arch, which is beneficial to the stability of the arch structure;
[0042] 3. Using butyl rubber or aluminosilicate wool as the material for the expansion joint has the comprehensive advantages of high temperature resistance, sealing, and flexibility, which is beneficial to the stability of the furnace body structure and greatly extends the service life of the furnace body. The above description is only an embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural or equivalent process transformation made by using the content of the specification and drawings of the present utility model, or directly or indirectly applied in other related technical fields, shall be equally included in the patent protection scope of the present utility model.
Claims
1. An expansion joint vault structure, characterized in that: It consists of three split vaults connected in sequence, namely the middle vault and two side vaults; The left and right edges of the middle arch are overlapped on the edges of the two side arches, and a top expansion joint is provided at the overlap, so that there is a gap between the split structures for thermal expansion and contraction; The left and right edges of the middle arch have protruding upper overlapping sections, and the corresponding edges of the side arch have protruding lower overlapping sections. When the two are overlapped, the top expansion joint is filled.
2. The expansion joint vault structure according to claim 1, characterized in that: The top expansion joint is made of butyl rubber or aluminum silicate wool.
3. A drying furnace, characterized in that: include: An expansion joint vault structure and a furnace wall as described in any one of claims 1 or 2; The left and right side edges of the arch structure are fixedly connected to the furnace wall, and the front and rear side edges are embedded and connected to the furnace wall, and side expansion joints are arranged at the embedded connection.
4. A drying furnace according to claim 3, characterized in that: The front and rear side edges of the arch structure are provided with embedded sections, and the corresponding edges of the furnace wall are provided with embedded grooves. When the two are embedded and connected, the side expansion joints are filled.
5. A drying furnace according to claim 4, characterized in that: A limiting structure is also provided at the position where the middle arch is embedded and connected with the furnace wall to limit the space for the middle arch to move upward.
6. A drying furnace according to claim 5, characterized in that: The limiting structure comprises an upper connecting piece and a lower connecting piece, wherein the upper connecting piece has a limiting rod, and the lower connecting piece has a waist hole for accommodating the limiting rod.