Sealing assembly for a roaster

Abstract

The utility model discloses a sealing assembly for roasting furnace, include: sealing element, sealing element detachably installed on the barrel of roasting furnace, and sealing element and the outer wall of sealing cavity are formed between the barrel, gas supply assembly, gas supply assembly detachably installed on the barrel of roasting furnace, the air inlet of gas supply assembly is linked with gas source, and the air outlet of gas supply assembly is located in sealing cavity, and can pass into the compressed air in gas source in sealing cavity, mounting structure, sealing element and gas supply assembly are detachably connected with the barrel through mounting structure. The sealing assembly that the utility model adopts uses sealing element and gas supply assembly in cooperation, and the sealing cavity is purged through increasing the back blow air system and increasing the internal and external pressure difference, to guarantee the sealing effect, and simultaneously, the detachable design is convenient for installation and maintenance, and the cost of equipment reconstruction and maintenance is reduced.

Description

Technical Field

[0001] This utility model relates to the field of chemical equipment accessories technology, specifically to a sealing component for a roasting furnace. Background Technology

[0002] During operation, the roasting furnace requires sealing of its cylinder. Existing technologies primarily use packing seals for sealing. However, roasting furnaces are electrically heated high-temperature equipment, and prolonged operation can easily lead to cylinder deformation. This increases the runout of the cylinder sealing surface, resulting in larger gaps at the packing seal and seal failure. Furthermore, the packing material is prone to aging and loss of elasticity under prolonged high-temperature operation, making it susceptible to gaps or breaks at the radial direction and interfaces. Cylinder deformation further exacerbates the increased gap between the packing seal layer and the cylinder, rendering the packing seal unusable and leading to continuous material leakage. Utility Model Content

[0003] Therefore, this utility model provides a sealing assembly for a roasting furnace to solve at least one of the above-mentioned technical problems.

[0004] To achieve the above objectives, the present invention provides the following technical solution: A sealing assembly for a roasting furnace, comprising: A sealing element is detachably installed on the cylinder of the roasting furnace, and a sealing cavity is formed between the sealing element and the outer wall of the cylinder; A gas supply assembly is detachably installed on the cylinder of the roasting furnace. The gas supply assembly has an inlet end connected to a gas source and an outlet end located in the sealed cavity, which can introduce compressed air from the gas source into the sealed cavity. The mounting structure allows the seal and the air supply assembly to be detachably connected to the cylinder.

[0005] During operation, the sealing element is fixed to the outer wall of the roasting furnace cylinder using an installation structure, and the gas supply assembly is fixed to the cylinder using the same structure, ensuring that the outlet end of the gas supply assembly is located within the sealed cavity. The gas supply assembly is then activated by connecting to a gas source through its inlet end, allowing compressed air to enter the sealed cavity. Upon entering the cavity, the compressed air utilizes the internal and external pressure difference to exert an outward thrust on the sealing element, ensuring a tight seal between the element and the cylinder. During continuous use, if the cylinder undergoes radial deformation due to thermal expansion or mechanical stress, compressed air is injected into the sealed cavity to compensate for the resulting gap changes. Specifically, when the cylinder expands outward, the compressed air pushes the sealing element outward, filling the gap; when the cylinder contracts inward, the compressed air pressure decreases, and the sealing element contracts inward under the action of elastic restoring force, maintaining a seal and thus compensating for the gap changes between the sealing element and the cylinder caused by deformation.

[0006] Thus, the sealing assembly used in this invention combines the sealing element with the air supply assembly. By adding a backflush system to purge the sealing cavity and increase the internal and external pressure difference, the sealing effect is ensured. At the same time, the detachable design facilitates installation and maintenance, making it particularly suitable for the renovation of old equipment and reducing the cost of equipment renovation and maintenance.

[0007] In some embodiments, the mounting structure includes: A flange, which is detachably connected to the cylinder body; A tapered section, the tapered section being mounted on the flange, and the sealing element being mounted on the tapered section; A support member is mounted on the flange, and the air supply assembly is mounted on the support member.

[0008] In some embodiments, the angle between the seal and the sealing surface ranges from 30 to 45°.

[0009] In some embodiments, the gas supply assembly includes: An air guide tube, wherein the air inlet end of the air guide tube is connected to the air source; A gas distribution pipe is installed on the support member, and the inlet end of the gas distribution pipe is connected to the outlet end of the gas guide pipe. A flexible air tube, wherein the air inlet end of the flexible air tube is connected to the air outlet end of the air distribution tube; An air nozzle is installed at the outlet end of the flexible air tube and is capable of delivering compressed air into the sealed cavity.

[0010] In some embodiments, the mounting structure further includes a hanger detachably mounted to the support member, and the gas distribution pipe is mounted to the hanger.

[0011] In some embodiments, the gas distribution pipe and the flexible gas pipe are connected by a quick-release connector.

[0012] In some embodiments, the air nozzle is threadedly connected to the tapered section and secured by a fastening nut. Attached Figure Description

[0013] To more clearly illustrate the embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0014] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the implementation conditions of this utility model. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that this utility model can produce, should still fall within the scope of the technical content disclosed in this utility model.

[0015] Figure 1 This is a schematic diagram illustrating the operating principle of the sealing assembly provided by this utility model. Figure 2 This is a schematic diagram of the sealing assembly provided by this utility model.

[0016] Explanation of reference numerals in the attached figures: 1-Flange, 2-Conical section, 3-Seal, 4-Support, 5-Hanger, 6-Gas distribution pipe, 7-Quick connector; 8- Flexible air tube, 9- Air nozzle, 10- Fastening nut. Detailed Implementation

[0017] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0018] In one specific implementation, such as Figures 1-2As shown, the sealing assembly for a roasting furnace provided by this utility model includes a sealing element, a gas supply assembly, and an installation structure. The sealing element is detachably installed on the furnace body, forming a sealed cavity between the sealing element and the outer wall of the furnace body. It should be understood that the sealed cavity is sealed to the outside world by the sealing element. The gas supply assembly is detachably installed on the furnace body, with its inlet end connected to a gas source and its outlet end located within the sealed cavity, capable of introducing compressed air from the gas source into the sealed cavity. The sealing element and the gas supply assembly are detachably connected to the furnace body via the installation structure. To improve sealing performance, the sealing element can be a scale seal, a common industrial sealing structure mainly used for sealing equipment such as rotary kilns and roasting furnaces. The scale seal consists of a series of metal sheets, shaped like fish scales, typically made of wear-resistant materials such as heat-resistant steel. These metal sheets overlap to form a fish-scale-like arrangement, thereby achieving a sealing effect. The scales are fixed to the sealing parts of the equipment by bolts, wire rope counterweights, etc., to ensure a tight fit during equipment operation. The scale seals are also used in combination with other sealing structures (such as labyrinth seals) to improve sealing performance. When the equipment rotates, the scales contact the equipment shell or sealing ring, forming a seal through friction and overlapping structure.

[0019] The aforementioned installation structure includes a flange, a tapered section, and a support member. The flange is detachably connected to the cylinder, enabling a detachable connection between the entire sealing assembly and the equipment cylinder. The tapered section is installed on the flange, and the sealing element is installed on the tapered section, connecting the sealing element to the flange. The support member is installed on the flange, and the air supply assembly is installed on the support member, connecting the air supply assembly to the flange. This combination of flange, tapered section, and support member provides stable support for the assembly, ensuring the secure installation of the sealing element and air supply assembly. Simultaneously, the detachable connection facilitates installation and maintenance, reducing on-site installation time, and the tapered section design can accommodate cylinders of different diameters, improving versatility.

[0020] In some embodiments, the seal is a multilayer non-metallic seal, and the seal material is a modified engineering special plastic and rubber composite material, which has good wear resistance and elasticity; the angle between the seal and the sealing surface is in the range of 30-45°.

[0021] The aforementioned air supply assembly includes an air guide pipe, an air distribution pipe, a flexible air pipe, and an air nozzle; wherein, the air inlet end of the air guide pipe is connected to the air source, the air distribution pipe is installed on the support member, the air inlet end of the air distribution pipe is connected to the air outlet end of the air guide pipe, the air inlet end of the flexible air pipe is connected to the air outlet end of the air distribution pipe, and the air nozzle is installed on the air outlet end of the flexible air pipe and is capable of delivering compressed air into the sealed cavity; the orifice diameter of the air nozzle is generally φ6-18mm.

[0022] In this way, the flexible air tubing can adapt to equipment vibration and deformation, ensuring stable air supply. The nozzle design allows for precise control of compressed air flow, forming a stable air cushion. All components are detachably connected for easy maintenance and replacement. Furthermore, the air tubing can be made of stainless steel to improve corrosion resistance, and the nozzles can be adjustable to adapt to different operating conditions.

[0023] To improve the installation stability of the gas distribution pipe, the installation structure also includes a hanger, which is detachably installed on the support member. The gas distribution pipe is installed on the hanger, and the hanger provides additional support for the gas distribution pipe to ensure the stability of the gas supply system. The detachable design facilitates the installation and maintenance of the gas distribution pipe, and the hanger can be adjusted according to the actual size of the equipment to improve versatility.

[0024] Furthermore, the gas distribution pipe and the flexible gas tube are connected by a quick-release connector. The quick-release connector design facilitates the rapid replacement of the flexible gas tube, reduces maintenance time, and ensures a reliable connection.

[0025] The aforementioned air nozzle is installed on the conical section by a fastening nut to improve the installation performance between the air nozzle and the conical section. The air nozzle is a custom-made air nozzle, which can be used for air blowing and fastening. The air nozzle and the conical section are connected by threads, which facilitates replacement and maintenance, and meets the strength requirements for fixing the seal.

[0026] For ease of understanding, the installation and use process of the sealing component provided by this utility model is described below.

[0027] Please continue to refer to this. Figure 1 and Figure 2 The flange is installed on the equipment to fix the sealing assembly as a whole, which facilitates the disassembly and replacement of the equipment without damaging the existing equipment structure; the cone section 2 is a support structure used to support the seal and ensure a specific angle between the seal and the sealing surface; the material of the seal 3 can be a composite modified material, which has a good sealing effect and compensation amount; the integrated structure of the support 4 and the hanger 5 is used to support the gas distribution pipe 6; the gas distribution pipe 6 is used for gas distribution and pressure stabilization, the quick-connect coupling 7 is convenient for installation and replacement, the flexible hose 8 is used for gas transportation, the air nozzle 9 plays the role of ventilation and purging, and the fixing nut 10 is used to fix the air nozzle 9.

[0028] During operation, the sealing element is fixed to the outer wall of the roasting furnace cylinder using an installation structure, and the gas supply assembly is fixed to the cylinder using the same structure, ensuring that the outlet end of the gas supply assembly is located within the sealed cavity. The gas supply assembly is then activated by connecting to a gas source through its inlet end, allowing compressed air to enter the sealed cavity. Upon entering the cavity, the compressed air utilizes the internal and external pressure difference to exert an outward thrust on the sealing element, ensuring a tight seal between the element and the cylinder. During continuous use, if the cylinder undergoes radial deformation due to thermal expansion or mechanical stress, compressed air is injected into the sealed cavity to compensate for the resulting gap changes. Specifically, when the cylinder expands outward, the compressed air pushes the sealing element outward, filling the gap; when the cylinder contracts inward, the compressed air pressure decreases, and the sealing element contracts inward under the action of elastic restoring force, maintaining a seal and thus compensating for the gap changes between the sealing element and the cylinder caused by deformation.

[0029] Thus, the sealing assembly used in this invention combines the sealing element with the air supply assembly. By adding a backflush system to purge the sealing cavity and increase the internal and external pressure difference, the sealing effect is ensured. At the same time, the detachable design facilitates installation and maintenance, making it particularly suitable for the renovation of old equipment and reducing the cost of equipment renovation and maintenance.

[0030] Furthermore, this sealing assembly is particularly suitable for retrofitting older equipment, offering good compensation capabilities and applicable to radial compensation after deformation of the old equipment's cylinder. It is easy to install and disassemble, and can be prefabricated and directly replaced without modifying the equipment. Maintenance costs are low, as individual damaged seals can be replaced modularly. It possesses self-cleaning capabilities, using a sealing gas system to clean the sealing cavity in real time, ensuring no material accumulation and extending seal life. It also has gas protection capabilities, allowing the introduction of a specified atmosphere according to process requirements, providing basic gas protection.

[0031] The above specific embodiments further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above are only specific embodiments of this utility model and are not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made on the basis of the technical solution of this utility model should be included within the scope of protection of this utility model.

Claims

1. A sealing assembly for a roasting furnace, characterized in that, include: A sealing element is detachably installed on the cylinder of the roasting furnace, and a sealing cavity is formed between the sealing element and the outer wall of the cylinder; A gas supply assembly is detachably installed on the cylinder of the roasting furnace. The gas supply assembly has an inlet end connected to a gas source and an outlet end located in the sealed cavity, which can introduce compressed air from the gas source into the sealed cavity. The mounting structure allows the seal and the air supply assembly to be detachably connected to the cylinder.

2. The sealing assembly for a roasting furnace according to claim 1, characterized in that, The mounting structure includes: A flange, which is detachably connected to the cylinder body; A tapered section, the tapered section being mounted on the flange, and the sealing element being mounted on the tapered section; A support member is mounted on the flange, and the air supply assembly is mounted on the support member.

3. The sealing assembly for a roasting furnace according to claim 2, characterized in that, The angle between the seal and the sealing surface is in the range of 30-45°.

4. The sealing assembly for a roasting furnace according to claim 2, characterized in that, The gas supply assembly includes: An air guide tube, wherein the air inlet end of the air guide tube is connected to the air source; A gas distribution pipe is installed on the support member, and the inlet end of the gas distribution pipe is connected to the outlet end of the gas guide pipe. A flexible air tube, wherein the air inlet end of the flexible air tube is connected to the air outlet end of the air distribution tube; An air nozzle is installed at the outlet end of the flexible air tube and is capable of delivering compressed air into the sealed cavity.

5. The sealing assembly for a roasting furnace according to claim 4, characterized in that, The installation structure also includes a hanger, which is detachably mounted on the support member, and the gas distribution pipe is mounted on the hanger.

6. The sealing assembly for a roasting furnace according to claim 4, characterized in that, The gas distribution pipe is connected to the flexible gas pipe via a quick-release connector.

7. The sealing assembly for a roasting furnace according to claim 4, characterized in that, The air nozzle is threadedly connected to the tapered section and secured by a fastening nut.

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