An inner mold for forming a ceramic fiber filter cartridge

Abstract

The utility model provides an inner mold for forming a ceramic fiber filter cartridge, the inner mold includes a distribution shaft for centrifugally distributing the ceramic fiber filter cartridge, the distribution shaft has a hollow flow channel for the flow of ceramic fiber slurry and a distribution hole for the slurry to flow out; the distribution shaft includes an inner shaft and an outer sleeve sleeved on the outer periphery of the inner shaft; wherein the outer sleeve is made of a polymer wear-resistant material, and the inner shaft is made of an alkali-resistant metal material. The outer layer structure of the distribution shaft of the utility model embodiment adopts an outer sleeve made of a polymer wear-resistant material, and the inner layer structure adopts an inner shaft made of an alkali-resistant metal material. The density of the outer layer structure is less than that of the inner shaft. Compared with a distribution shaft made of a single metal material, its overall weight is much smaller, which is conducive to reducing the deflection of the distribution shaft and reducing the eccentricity error during the forming process of the ceramic fiber filter cartridge.

Description

Technical Field

[0001] The utility model relates to the field of ceramic fiber filter cartridge molding equipment, in particular to an inner mold used for ceramic fiber filter cartridge molding. Background Art

[0002] In the field of glass kilns, coking furnaces, industrial boilers, waste incineration and other flue gas multi-pollutant purification, ceramic fiber filter cartridges are a widely used filter that uses rigid microporous materials as filter elements. Compared with traditional granular filter materials, ceramic fiber filter cartridges have a larger specific surface area of ​​fiber filter materials, have greater interface adsorption and can intercept suspended matter, and have a good filtration effect; compared with traditional filter materials such as cloth bags, ceramic fiber filter cartridges can be used in high temperature or even ultra-high temperature environments; compared with porous ceramics and metal filter materials, ceramic fiber filter cartridges do not require sintering, have low resistance and save energy, and have good chemical stability and thermal shock resistance.

[0003] The preparation equipment and method of ceramic fiber filter cartridges in the prior art generally form and then fire. In fact, due to problems such as the forming process and the firing process, the ceramic fiber filter cartridge cannot ensure that the pores of the ceramic fiber filter cartridge remain consistent and the ceramic fibers are distributed in distinct layers, so the actual use effect of the ceramic fiber filter cartridge is not very ideal.

[0004] Generally speaking, the longer the ceramic fiber filter cartridge is, the larger the filter capacity is, the smaller the filter area is, and the higher the economic advantage is. However, in order to produce a longer ceramic fiber filter cartridge, the longer the cloth shaft is, and the longer the cloth shaft is, the greater its deflection is, which is not conducive to the centrifugal cloth and the molding process of the ceramic fiber filter cartridge. Due to the high difficulty of processing and molding ceramic fiber filter cartridges, few domestic companies can independently produce high-quality ceramic tubes. Utility Model Content

[0005] In view of this, an embodiment of the utility model provides an inner mold for molding a ceramic fiber filter cartridge to eliminate or improve one or more defects existing in the prior art.

[0006] The technical solution of the utility model is as follows:

[0007] The inner mold includes a distribution shaft for centrifugally distributing the ceramic fiber filter cartridge, the distribution shaft has a hollow flow channel for the ceramic fiber slurry to flow and a distribution hole for the slurry to flow out; the distribution shaft includes an inner shaft and an outer sleeve sleeved on the outer circumference of the inner shaft; wherein the outer sleeve is made of a polymer wear-resistant material, and the inner shaft is made of an alkali-resistant metal material.

[0008] In some embodiments, the driven end of the fabric shaft is used to connect to a structure that drives it to rotate, and the diameter of the shaft end of the inner shaft close to the driven end is larger than the diameter of the shaft end far from the driven end.

[0009] In some embodiments, the inner shaft is a tapered shaft structure or a stepped shaft structure with two or more sections of different shaft diameters.

[0010] In some embodiments, the inner shaft is a stepped shaft structure with more than two sections of different shaft diameters, and the outer sleeve includes more than two sections of sub-sleeves with different apertures. The number of sections of the sub-sleeves is the same as the number of sections of the stepped shaft, and the aperture of each section of the sub-sleeve is the same as the outer diameter of the corresponding stepped shaft.

[0011] In some embodiments, each section of the stepped shaft is integrally formed, and the mating ends of each section of the sub-sleeve have a socket joint and are connected by heat melting or welding.

[0012] In some embodiments, the inner shaft and the outer sleeve are connected by a key, a set screw and / or an interference fit.

[0013] In some embodiments, the inner shaft is made of stainless steel, and the outer sleeve is made of a polymer plastic material.

[0014] In some embodiments, the material distribution holes are provided in plurality, wherein the material distribution holes are staggeredly distributed in the axial direction and the circumferential direction of the material distribution shaft.

[0015] In some embodiments, the distribution holes are rectangular groove structures, each of the distribution holes is evenly distributed along a cylindrical spiral line on the distribution axis, each of the distribution holes is a straight hole, and the opening direction is parallel to the axial direction of the distribution axis, and one end thereof along the axial direction is on the same radial section as the end of the adjacent distribution hole close to the distribution hole, and all of the distribution holes are combined into a connected long groove structure in the axial projection.

[0016] In some embodiments, at least one edge of the material distribution hole along the axial direction and bordering the outer circumferential surface of the material distribution shaft has a transitional fillet, chamfer or flared structure.

[0017] According to the inner mold for forming a ceramic fiber filter cartridge in the embodiment of the utility model, the beneficial effects that can be obtained include at least:

[0018] The outer layer structure of the distribution shaft of the embodiment of the utility model adopts an outer sleeve made of a polymer wear-resistant material, and the inner layer structure adopts an inner shaft made of an alkali-resistant metal material. The density of the outer layer structure is lower than the density of the inner shaft. Compared with a distribution shaft made of a single metal material, its overall weight is much smaller, which is beneficial to reducing the deflection of the distribution shaft and reducing the eccentricity error during the molding process of the ceramic fiber filter cartridge.

[0019] Additional advantages, purposes, and features of the present invention will be partially described in the following description, and will become partially apparent to those skilled in the art after studying the following, or may be learned from the practice of the present invention. The purposes and other advantages of the present invention can be achieved and obtained by the structures specifically pointed out in the written description and its claims and the drawings.

[0020] Those skilled in the art will understand that the purposes and advantages that can be achieved by the present invention are not limited to the above specific description, and the above and other purposes that can be achieved by the present invention will be more clearly understood based on the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings described herein are used to provide a further understanding of the present invention, constitute a part of the present application, and do not constitute a limitation of the present invention. The components in the drawings are not drawn to scale, but are only for the purpose of illustrating the principles of the present invention. In order to facilitate the illustration and description of some parts of the present invention, the corresponding parts in the drawings may be enlarged, that is, they may become larger relative to other components in the exemplary device actually manufactured according to the present invention. In the drawings:

[0022] Figure 1 It is a schematic structural diagram of a material distribution shaft in one embodiment of the utility model.

[0023] Figure 2 It is a structural schematic diagram of a material distribution shaft section of a material distribution shaft in another embodiment of the utility model.

[0024] Figure 3 for Figure 2 The axial projection of the material distribution hole in the embodiment is a schematic diagram of the structure.

[0025] Figure 4 The figure is a schematic structural diagram of the inner shaft of the material distribution shaft in another embodiment of the present utility model.

[0026] Figure 5 The figure is a schematic structural diagram of the outer sleeve of the material distribution shaft in another embodiment of the present utility model.

[0027] Figure 6 The figure is a schematic structural diagram of the segmented welding of the material distribution shaft in another embodiment of the present utility model.

[0028] Figure 7 It is a schematic diagram of the cross-sectional structure of a material distribution hole in an embodiment of the present utility model. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in combination with the implementation mode and the accompanying drawings. Here, the schematic implementation mode of the utility model and its description are used to explain the utility model, but are not used as a limitation of the utility model.

[0030] It should also be noted that, in order to avoid obscuring the present invention due to unnecessary details, only structures and / or processing steps closely related to the scheme according to the present invention are shown in the accompanying drawings, while other details that are not closely related to the present invention are omitted.

[0031] It should be emphasized that the term “include / comprises” when used herein refers to the presence of features, elements, steps or components, but does not exclude the presence or addition of one or more other features, elements, steps or components.

[0032] It should also be noted that, unless otherwise specified, the term “connection” herein may refer not only to a direct connection but also to an indirect connection involving an intermediate.

[0033] The utility model provides an inner mold for forming a ceramic fiber filter cartridge, the inner mold comprising a distribution shaft for centrifugally distributing the ceramic fiber filter cartridge, the distribution shaft is mainly used to evenly distribute the mixed slurry into the forming mold to form the ceramic fiber filter cartridge. The distribution shaft of the utility model embodiment also has another function of serving as an inner mold of the ceramic fiber filter cartridge.

[0034] like Figure 1 , 4 As shown in Figure 5, the inner mold includes a distribution shaft for centrifugally distributing the ceramic fiber filter cartridge, and the distribution shaft has a hollow flow channel 401 for the flow of ceramic fiber slurry and a distribution hole 402 for the slurry to flow out. The distribution shaft includes an inner shaft 530 and an outer sleeve 540 sleeved on the outer circumference of the inner shaft 530; wherein the outer sleeve 540 is made of a polymer wear-resistant material, and the inner shaft 530 is made of an alkali-resistant metal material.

[0035] The outer layer structure of the distribution shaft of the embodiment of the utility model adopts an outer sleeve made of a polymer wear-resistant material, and the inner layer structure adopts an inner shaft made of an alkali-resistant metal material. The density of the outer layer structure is lower than the density of the inner shaft. Compared with a distribution shaft made of a single metal material, its overall weight is much smaller, which is beneficial to reducing the deflection of the distribution shaft and reducing the eccentricity error during the molding process of the ceramic fiber filter cartridge.

[0036] In some embodiments, during the molding process, the fabric shaft rotates, and its outer structure is in direct contact with the gradually molded and hardened ceramic fiber filter cartridge, which causes greater wear. Therefore, the outer sleeve is made of a polymer wear-resistant material, which greatly extends the life of the fabric shaft and reduces equipment costs.

[0037] During the molding process, the inner shaft of the distribution shaft is in direct contact with the flow channel, and as an internal structure, it needs to have greater strength to support the entire distribution shaft. The slurry of the ceramic fiber filter cartridge is generally alkaline, so the inner shaft can be set to an alkali-resistant metal material. Preferably, the inner shaft can be made of 304 stainless steel, 2Cr13 or other high-strength stainless steel materials to ensure its strength and corrosion resistance.

[0038] In some embodiments, in order to further reduce the weight of the fabric shaft, the inner and outer structures of the fabric shaft may be set to have unequal diameters. For example, the inner shaft is mainly used to bear the strength and the torque during centrifugal rotation of the fabric, so a thicker diameter is set at the part close to the driving end, and a thinner diameter is set at the end, so that a larger volume of a lighter outer sleeve can be arranged.

[0039] For example, the driven end of the fabric shaft is used to connect with the structure driving it to rotate, and the diameter of the shaft end of the inner shaft 530 close to the driven end is larger than the diameter of the shaft end away from the driven end. Optionally, the inner shaft 530 is a tapered shaft structure or a stepped shaft structure with two or more sections of different shaft diameters, and correspondingly, the outer periphery of the outer sleeve 540 is flush, and the shape of the inner hole matches the outer periphery of the inner shaft.

[0040] For example, the inner shaft 530 is a stepped shaft structure with two or more sections of different shaft diameters. Figure 5 As shown, the outer sleeve 540 includes more than two sections of sub-sleeves with different apertures, the number of sections of the sub-sleeves is the same as the number of sections of the stepped shaft, and the aperture of each section of the sub-sleeve is the same as the outer diameter of the corresponding stepped shaft.

[0041] like Figure 4 and Figure 6 As shown, the stepped shaft is integrally formed, and the ends of the sub-sleeves of each section that cooperate with each other have a spigot for socket-jointing, and are connected by hot melting or welding. The spigot may include a notch 541 and a protrusion 542 for plugging. Preferably, considering the length and processing difficulty of the fabric shaft, and the matching assembly of each section of the sub-sleeve and the inner shaft, the outer sleeve needs to be made of segmented polymer materials, and plastic materials are selected, which can be hot-melt-jointed to ensure that the joint polymer has a high strength. Usually, more than two sections are selected for segmented socket jointing and hot-melt welding.

[0042] like Figure 4 and Figure 7 As shown, the inner shaft 530 and the outer sleeve 540 are connected by key, set screw and / or interference fit. For example, keyways can be machined on the outer circumference of each stepped shaft segment of the inner shaft 530, and keyways can be machined on the inner holes of each sub-sleeve of the outer sleeve 540, and connected by key 531. The keyways of each segment can be staggered to avoid being on the same generatrix. The connection between the inner shaft 530 and the outer sleeve can also be connected by set screws or jackscrews to prevent them from sliding in the axial direction.

[0043] In some embodiments, Figure 1 As shown, the distribution shaft may include a mounting shaft section 510 and a distribution shaft section 520, and a flow channel 501 for slurry to flow is provided inside the distribution shaft.

[0044] The mounting shaft section 510 is used to connect with a device driving the rotation thereof, and one end of the mounting shaft section 510 is provided with a slurry feed interface 511. The slurry feed interface 511 of the flow channel 501 can be connected with a feeding part to provide a continuous supply of slurry, and the other end of the flow channel 501 can be blocked so that the slurry can only flow out from the distribution hole 502 described below.

[0045] The material distribution shaft section 520 is provided with a plurality of material distribution holes 502 which are evenly distributed and communicated with the flow channel 501 , wherein the material distribution holes 502 are staggeredly distributed in the axial direction and the circumferential direction of the material distribution shaft.

[0046] At present, some equipment in foreign countries or abroad will intermittently slot the cloth holes on a generatrix of the cloth shaft, and cannot be slotted into a continuous long slot due to strength issues. Each cloth hole will have a certain interval in the axial direction. The porosity and pore size of the ceramic fiber filter cartridge corresponding to this interval area and the cloth hole area are generally very different, which is also easy to cause uneven strength of the ceramic fiber filter cartridge.

[0047] The distribution holes in the embodiment of the utility model are staggered in the axial direction and circumferential direction of the distribution shaft. Compared with the conventional arrangement along the same generatrix, the total length of the distribution holes on the distribution shaft can be greatly increased, and the axial relative spacing of each distribution hole can be reduced to a minimum (can be zero), so that the slurry can be discharged continuously and uninterruptedly in the axial direction of the ceramic fiber filter cartridge, which is conducive to solving the problems of uneven porosity and pore size and uneven strength of the ceramic filter tube.

[0048] In some embodiments, Figure 1 and Figure 2 As shown, each feeding hole 502 of the feeding shaft is a rectangular slot structure. Setting the feeding hole as a rectangular slot structure is conducive to ensuring uniform material discharge at each position in the axial direction and in a single feeding hole. Preferably, the feeding hole is a length end in the axial direction of the feeding shaft and a width end in the tangential direction of the feeding shaft.

[0049] In one embodiment, if Figure 2 As shown, each material distribution hole 502 is a straight hole, and the opening direction is parallel to the axial direction of the material distribution axis, and one end thereof along the axial direction is on the same radial section as the end of the adjacent material distribution hole close to the material distribution hole, as shown in FIG. Figure 3 As shown, all the material distribution holes 502 are combined into a connected long slot structure in axial projection.

[0050] In another embodiment, if Figure 1 As shown, each material distribution hole 502 is an inclined hole or an arc-shaped hole, and the end contour of each material distribution hole 502 on the same length side is along a cylindrical spiral line on the material distribution axis. Figure 1 In the embodiment, the material distribution holes 502 can be arranged at small intervals, or can be arranged in a continuous manner with narrow grooves.

[0051] In some embodiments, Figure 1 As shown, a positioning hole 503 is provided at one end of the distribution shaft away from the slurry feed interface 511. The positioning hole 503 is located at the center of the shaft end. The positioning hole 503 may be connected to or not connected to the flow channel 501, preferably not connected. The installation shaft section 510 of the distribution shaft is a fixed end with a shorter length; the distribution shaft section 520 is a suspended end with a longer length. The positioning hole 503 can be positioned by a structure similar to a top.

[0052] In some embodiments, Figure 7 As shown, at least one edge of the material distribution hole 502 along the axial direction and intersecting with the outer peripheral surface of the material distribution shaft has a transitional fillet, chamfer or flared structure. The fillet, chamfer or flared structure can facilitate the outflow of the slurry.

[0053] Preferably, one edge of the material distributing hole 502 has a first rounded corner 5021, and the other edge has a second rounded corner 5022. In the rotation direction of the material distributing shaft, the first rounded corner 5021 is located upstream of the second rounded corner 5022, and the size of the first rounded corner 5021 is smaller than the second rounded corner 5022. The first rounded corner 5021 and the second rounded corner 5022 can also be set as chamfered structures, and similarly, the above-mentioned positional relationship and size relationship can also be maintained.

[0054] For example, Figure 7 When the cloth shaft rotates counterclockwise, the first fillet 5021 is the front fillet, and the second fillet 5022 is the rear fillet. In the direction of rotation, the front chamfer is used to smooth the slurry, and the rear chamfer is used to smooth the slurry, ensuring that the inner wall of the ceramic fiber filter cartridge is smoothed during the rotation process to prevent the inner wall of the ceramic fiber filter cartridge from cracking or roughening.

[0055] In some embodiments, Figure 1 As shown, the installation shaft section 510 can be integrally formed with the material distribution shaft section 520 for easy processing and manufacturing. In other embodiments, the material distribution shaft section 520 can also adopt other structures connected to the driving device, such as a coupling, and the installation shaft section 510 may not be required.

[0056] According to the inner mold for forming a ceramic fiber filter cartridge in the embodiment of the utility model, the beneficial effects that can be obtained include at least:

[0057] (1) The outer structure of the distribution shaft of the embodiment of the utility model adopts an outer sleeve made of a polymer wear-resistant material, and the inner structure adopts an inner shaft made of an alkali-resistant metal material. The density of the outer structure is less than that of the inner shaft. Compared with a distribution shaft made of a single metal material, its overall weight is much smaller, which is beneficial to reducing the deflection of the distribution shaft and reducing the eccentricity error in the molding process of the ceramic fiber filter cartridge.

[0058] (2) The outer sleeve of the embodiment of the utility model is made of a polymer wear-resistant material, which greatly extends the service life of the cloth shaft and reduces the equipment cost.

[0059] (3) The inner shaft and outer sleeve of the feed shaft in the embodiment of the utility model can adopt a segmented structure or a tapered structure with different diameters, which can reduce the weight of the feed shaft as much as possible while ensuring sufficient strength, reduce the deflection of the feed shaft and the eccentricity error of centrifugal rotation, and is conducive to the molding of the ceramic fiber filter cartridge.

[0060] In the present invention, features described and / or illustrated for one embodiment may be used in the same manner or in a similar manner in one or more other embodiments, and / or combined with features of other embodiments or replace features of other embodiments.

[0061] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the embodiments of the utility model may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. An inner mold for forming a ceramic fiber filter cartridge, characterized in that: The inner mold comprises a distribution shaft for centrifugally distributing the ceramic fiber filter cartridge, wherein the distribution shaft has a hollow flow channel for the ceramic fiber slurry to flow and a distribution hole for the slurry to flow out; The material distribution shaft comprises an inner shaft and an outer sleeve sleeved on the outer circumference of the inner shaft; Wherein, the outer sleeve is made of a polymer wear-resistant material, and the inner shaft is made of an alkali-resistant metal material.

2. The inner mold for forming a ceramic fiber filter cartridge according to claim 1, characterized in that: The driven end of the fabric shaft is used to be connected to a structure that drives it to rotate, and the diameter of the shaft end of the inner shaft close to the driven end is larger than the diameter of the shaft end far from the driven end.

3. The inner mold for forming a ceramic fiber filter cartridge according to claim 2, characterized in that: The inner shaft is a tapered shaft structure or a stepped shaft structure with more than two sections of different shaft diameters.

4. The inner mold for forming a ceramic fiber filter cartridge according to claim 2, characterized in that: The inner shaft is a stepped shaft structure with more than two sections of different shaft diameters, and the outer sleeve includes more than two sections of sub-sleeves with different apertures. The number of sections of the sub-sleeves is the same as the number of sections of the stepped shaft, and the aperture of each section of the sub-sleeve is the same as the outer diameter of the corresponding stepped shaft.

5. The inner mold for forming a ceramic fiber filter cartridge according to claim 4, characterized in that: Each section of the stepped shaft is integrally formed, and the mutually matching ends of the sub-sleeves of each section have a spigot joint and are connected by hot melting or welding.

6. The inner mold for forming a ceramic fiber filter cartridge according to claim 4 or 5, characterized in that: The inner shaft and the outer sleeve are connected by a key, a set screw and / or an interference fit.

7. The inner mold for forming a ceramic fiber filter cartridge according to claim 1 or 5, characterized in that: The inner shaft is made of stainless steel, and the outer sleeve is made of polymer plastic material.

8. The inner mold for forming a ceramic fiber filter cartridge according to claim 4, characterized in that: There are a plurality of distribution holes, wherein the distribution holes are staggeredly distributed in the axial direction and the circumferential direction of the distribution shaft.

9. The inner mold for forming a ceramic fiber filter cartridge according to claim 8, characterized in that: The distribution holes are rectangular groove structures, and each of the distribution holes is evenly distributed along a cylindrical spiral line on the distribution shaft. Each of the distribution holes is a straight hole, and the opening direction is parallel to the axial direction of the distribution shaft, and one end thereof along the axial direction is on the same radial section as the end of the adjacent distribution hole close to the distribution hole, and all of the distribution holes are combined into a connected long groove structure in the axial projection.

10. The inner mold for forming a ceramic fiber filter cartridge according to claim 9, characterized in that: At least one edge of the material distribution hole along the axial direction and bordering the outer peripheral surface of the material distribution shaft has a transitional fillet, chamfer or flared structure.

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