A high temperature scatterer suitable for use in vacuum and positive pressure environments

Abstract

The utility model belongs to the technical field of stirring equipment, concretely relates to a high temperature scatterer suitable for vacuum and positive pressure environment, including furnace body, furnace cover and stirring mechanism, the stirring mechanism includes drive motor and stirring shaft, is provided with the heat preservation layer in the furnace body inner chamber top close to the furnace cover, is provided with the mounting through -hole that passes through for the stirring shaft on the heat preservation layer, is provided with the composite shaft seal structure in the mounting through -hole, the composite shaft seal structure includes high temperature dustproof sealing assembly and bidirectional pressure sealing assembly. The high temperature scatterer provided by the application has specially designed sealing structure at the stirring shaft, can easily cope with vacuum negative pressure and process positive pressure scene, ensures that the whole sealing structure can maintain long-term, stable sealing performance in the wide pressure range from vacuum to positive pressure, greatly improves the application range of the high temperature scatterer.

Description

Technical Field

[0001] This utility model relates to the field of mixing equipment technology, specifically to a high-temperature dispersant suitable for vacuum and positive pressure environments. Background Technology

[0002] In the fields of chemical engineering, pharmaceuticals, food, and new materials, many production processes (such as the dehydrogenation process of vitamins, dye intermediates, and lithium battery materials) require heat treatment of powdered or granular materials under heating conditions. During this process, due to the precipitation of trace amounts of moisture, oil, or low-melting-point substances contained in the materials themselves, coupled with the softening of the material surface and mutual contact at high temperatures, powder particles are prone to adhesion and sintering, forming hard lumps. Material lumps cause a series of serious problems. First, lumps lead to uneven heating of the material, affecting not only reaction efficiency but also reducing the stability of product quality. Second, large pieces of material may clog the discharge port or conveying equipment, causing production interruptions and requiring manual cleaning, which restricts continuous production and greatly reduces production efficiency. Finally, in some processes, lumped materials are difficult to reuse and can only be disposed of as waste, resulting in raw material waste and increased production costs.

[0003] To address the problem of powder agglomeration during heating, high-temperature dispersants are commonly integrated into or externally connected to heating equipment (such as rotary kilns, rake dryers, and ribbon mixers). These devices typically use high-speed rotating blades, hammers, or toothed rings to impact and shear the material, thereby breaking up soft lumps or initial agglomerates, ensuring material flowability and uniform heating. However, most existing high-temperature dispersants are designed and used in atmospheric pressure environments. Their main shaft (stirring shaft) seals typically employ simple lip seals or packing seals, resulting in generally poor sealing performance and unsuitability for processes requiring vacuum (negative pressure) or slightly positive pressure conditions. Therefore, this application aims to provide a high-temperature dispersant that not only possesses efficient dispersing capabilities at atmospheric pressure but is also reliably and stably applicable to vacuum and positive pressure process environments. Utility Model Content

[0004] The purpose of this invention is to address some shortcomings of existing technologies by providing a high-temperature dispersant suitable for vacuum and positive pressure environments.

[0005] The technical solution of this utility model is: a high-temperature dispersant suitable for vacuum and positive pressure environments, including a furnace body, a furnace cover, and a stirring mechanism; the furnace body can heat the material in the inner cavity; the stirring mechanism includes a drive motor and a stirring shaft, with blades provided on the stirring shaft, the lower end of the stirring shaft passing through the central hole on the furnace cover and extending into the inner cavity of the furnace body; a heat insulation layer is provided on the top of the inner cavity of the furnace near the furnace cover, and an installation through hole is provided on the heat insulation layer for the stirring shaft to pass through, and a composite shaft seal structure is provided in the installation through hole, the composite shaft seal structure including a high-temperature dustproof sealing component and a bidirectional pressure sealing component, the high-temperature dustproof sealing component is used to prevent dust material in the inner cavity of the furnace from leaking outward; the bidirectional pressure sealing component is located above the high-temperature dustproof sealing component, and is used to block the leakage of gas medium through the gap between the stirring shaft and the installation through hole when the inner cavity of the furnace is under positive pressure or vacuum.

[0006] Furthermore, the high-temperature dustproof sealing assembly includes, from bottom to top, a high-temperature sealing filler, a resin sleeve, a corrugated elastic pad, and a dustproof sealing ring.

[0007] Furthermore, the high-temperature sealing filler uses high-temperature resistant asbestos packing or graphite packing.

[0008] Furthermore, the resin sleeve and the corrugated spring washer, in conjunction with the clamping bolts, are used to pre-tighten the high-temperature sealing filler.

[0009] Furthermore, the bidirectional pressure sealing assembly includes, from bottom to top, a skeleton-type vacuum sealing ring, a skeleton-type positive pressure sealing ring, an O-ring, and a compression nut.

[0010] Furthermore, the skeleton-type vacuum seal ring has multiple layers.

[0011] Furthermore, the furnace body is composed of a cylindrical part and a lower conical part. The heat insulation layer is disposed in the space corresponding to the cylindrical part, and the blades are disposed in the lower conical part, with the rotation stroke of the blades adapted to the lower conical part.

[0012] Furthermore, the furnace cover is equipped with a feed inlet, and the insulation layer is equipped with feed holes corresponding to the feed inlet. The relevant powder raw materials enter the furnace cavity through the feed inlet and feed holes.

[0013] Furthermore, the stirring shaft has an internal cavity with cooling channels within it. Cooling medium flows through these channels and carries away the heat from the stirring shaft. The use of cooling channels and other related cooling system structures within a hollow stirring shaft for heat dissipation is a well-established technology and will not be elaborated upon here.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows: The high-temperature dispersant provided in this application has a specially designed sealing structure at the stirring shaft. The sealing structure includes a high-temperature dustproof sealing component and a bidirectional pressure sealing component. The high-temperature dustproof sealing component mainly prevents dust materials in the furnace cavity from leaking outward, while the bidirectional pressure sealing component above it can easily cope with vacuum negative pressure and process positive pressure scenarios. This ensures that the overall sealing structure can maintain long-term and stable sealing performance in a wide pressure range from vacuum to positive pressure, greatly improving the applicability of the high-temperature dispersant. Attached Figure Description

[0015] Figure 1 This is a schematic cross-sectional view of the overall structure of Embodiment 1 of this utility model; Figure 2 This is a schematic diagram of Embodiment 1 of the present invention, omitting the furnace body and drive motor; Figure 3 yes Figure 1 Enlarged schematic diagram of part A (i.e., the composite shaft seal structure); Figure 4 This is a partially enlarged schematic diagram of the high-temperature dustproof sealing assembly in Embodiment 1 of this utility model; In the diagram: 1. Furnace body; 11. Discharge port; 2. Furnace cover; 21. Feed port; 3. Stirring shaft; 31. Blades; 32. Cooling channel; 4. Drive motor; 5. Insulation layer; 6. Composite shaft seal structure; 61. High-temperature sealing filler; 62. Resin sleeve; 63. Waveform spring pad; 64. Dustproof sealing ring; 65. Skeleton type vacuum sealing ring; 66. Skeleton type positive pressure sealing ring; 67. O-ring; 68. Compression nut. Detailed Implementation

[0016] The present invention will be further described in detail below with reference to specific embodiments. Methods or functional components not specifically described in the embodiments are all prior art. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. Example

[0017] like Figure 1-4As shown, this embodiment is a high-temperature disperser suitable for vacuum and positive pressure environments, including a furnace body 1, a furnace cover 2, and a stirring mechanism. The furnace body 1 is used to heat the material in the inner cavity. The stirring mechanism includes a drive motor 4 and a stirring shaft 3. Blades 31 are provided on the stirring shaft 3. The upper end of the stirring shaft 3 is connected to the drive motor 4, and the lower end of the stirring shaft 3 passes through the central hole on the furnace cover 2 and extends into the inner cavity of the furnace body 1. A heat insulation layer 5 is provided near the top of the furnace cover 2 in the inner cavity of the furnace body 1. An installation through hole for the stirring shaft 3 to pass through is provided in the heat insulation layer 5. A composite shaft seal structure 6 is provided in the installation through hole. The composite shaft seal structure 6 includes a high-temperature dustproof sealing component and a bidirectional pressure sealing component. The high-temperature dustproof sealing component is used to prevent dust material in the inner cavity of the furnace body 1 from leaking outward. The bidirectional pressure sealing component is located above the high-temperature dustproof sealing component and is used to block the leakage of gas medium through the gap between the stirring shaft 3 and the installation through hole when the inner cavity of the furnace body 1 is under positive pressure or vacuum.

[0018] In this embodiment, the high-temperature dustproof sealing assembly includes, from bottom to top, a high-temperature sealing filler 61, a resin sleeve 62, a corrugated spring washer 63, and a dustproof sealing ring 64. The high-temperature sealing filler 61 is made of high-temperature resistant asbestos packing or graphite packing; the resin sleeve 62 and the corrugated spring washer 63 are used to pre-tighten the high-temperature sealing filler 61 with the help of relevant clamping bolts.

[0019] In this embodiment, the bidirectional pressure sealing assembly includes, from bottom to top, a skeleton-type vacuum sealing ring 65, a skeleton-type positive pressure sealing ring 66, an O-ring 67, and a clamping nut 68; the skeleton-type vacuum sealing ring 65 has multiple layers.

[0020] In this embodiment, the furnace body 1 consists of a cylindrical portion and a lower conical portion. The insulation layer 5 is disposed in the space corresponding to the cylindrical portion, and the blades 31 are disposed in the lower conical portion, with the rotation stroke of the blades 31 adapted to the lower conical portion. The furnace cover 2 is sealed to the furnace body 1; a feed inlet 21 is provided on the furnace cover 2, and a feed hole corresponding to the feed inlet 21 is provided on the insulation layer 5. The insulation layer 5 is made of a heat-insulating material, such as asbestos.

[0021] In this embodiment, the stirring shaft 3 has a cavity inside, and a cooling channel 32 is provided in the cavity. The cooling channel 32 includes a pipe coaxially arranged with the stirring shaft 3. The cooling medium passes through the cooling channel 32 and carries away the heat of the stirring shaft 3.

[0022] The high-temperature dispersant in this embodiment operates as follows: powdered raw materials enter the inner cavity of furnace body 1 through inlet 21. Furnace body 1 heats the powdered raw materials. During the heating process, the driving motor 4 drives the stirring shaft 3 to rotate, dispersing the powdered raw materials. Dispersing allows for more complete heating and reaction of the powder. After heating, the powder can enter the next process through outlet 11. The advantage of the high-temperature dispersant in this embodiment is that the sealing structure at the stirring shaft 3 is specially designed, allowing the dispersant to easily handle vacuum negative pressure and process positive pressure scenarios.

[0023] The above are only some embodiments of the present utility model and are not intended to limit the present utility model. For those skilled in the art, the present utility model can have various combinations and modifications of the aforementioned technical features. Any improvements, modifications, equivalent substitutions, or applications of the structure or method of the present utility model to other fields to achieve the same effect without departing from the spirit and scope of the present utility model shall fall within the protection scope of the present utility model.

Claims

1. A high-temperature dispersant suitable for vacuum and positive pressure environments, comprising a furnace body, a furnace cover, and a stirring mechanism; the stirring mechanism includes a drive motor and a stirring shaft, with blades disposed on the stirring shaft, the lower end of the stirring shaft passing through a central hole in the furnace cover and extending into the inner cavity of the furnace body; characterized in that: An insulation layer is provided at the top of the furnace inner cavity near the furnace cover. An installation through hole is provided on the insulation layer for the stirring shaft to pass through. A composite shaft seal structure is provided in the installation through hole. The composite shaft seal structure includes a high-temperature dustproof sealing component and a bidirectional pressure sealing component. The high-temperature dustproof sealing component is mainly used to prevent dust materials in the furnace inner cavity from leaking outward. The bidirectional pressure sealing component is located above the high-temperature dustproof sealing component and is used to block the leakage of gas medium through the gap between the stirring shaft and the installation through hole when the furnace inner cavity is under positive pressure or vacuum.

2. The high-temperature agitator suitable for vacuum and positive pressure environments according to claim 1, characterized in that: The high-temperature dustproof sealing assembly, from bottom to top, includes a high-temperature sealing filler, a resin sleeve, a corrugated elastic pad, and a dustproof sealing ring.

3. The high-temperature dispersant suitable for vacuum and positive pressure environments according to claim 1, characterized in that: The bidirectional pressure sealing assembly, from bottom to top, includes a skeleton-type vacuum sealing ring, a skeleton-type positive pressure sealing ring, an O-ring, and a compression nut.

4. The high-temperature dispersant suitable for vacuum and positive pressure environments according to claim 2, characterized in that: The high-temperature sealing filler is made of high-temperature resistant asbestos packing or graphite packing.

5. The high-temperature dispersant suitable for vacuum and positive pressure environments according to claim 2, characterized in that: The resin sleeve and the corrugated spring washer, in conjunction with the relevant clamping bolts, are used to pre-tighten the high-temperature sealing filler.

6. The high-temperature agitator suitable for vacuum and positive pressure environments according to claim 1, characterized in that: The furnace body is composed of a cylindrical part and a lower conical part. The heat insulation layer is disposed in the space corresponding to the cylindrical part, and the blades are disposed in the lower conical part, with the rotation stroke of the blades adapted to the lower conical part.

7. The high-temperature agitator suitable for vacuum and positive pressure environments according to claim 1, characterized in that: The furnace cover is equipped with a feed inlet, the insulation layer is equipped with a feed hole corresponding to the feed inlet, and the furnace body is equipped with a discharge outlet at the bottom.

8. The high-temperature agitator suitable for vacuum and positive pressure environments according to claim 1, characterized in that: The stirring shaft has an internal cavity with a cooling channel inside. The cooling medium flows through the cooling channel and carries away the heat from the stirring shaft.

9. The high-temperature dispersant suitable for vacuum and positive pressure environments according to claim 3, characterized in that: The skeleton-type vacuum sealing ring has multiple layers.

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