Thickening type cement preheater inner cylinder

Abstract

The utility model relates to a thickened cement preheater inner cylinder which comprises a reinforcing plate and castable, and the castable is used for integrally wrapping the reinforcing plate. The reinforcing plate is formed by splicing a plurality of thickening plates and common plates; the thickness of the thickened plate is larger than that of the common plate. The inner cylinder comprises the reinforcing plate, the reinforcing plate is formed by splicing and assembling the thickening plate and the common plate, the strength of the upper portion of the inner cylinder can be guaranteed, and the overall weight of the inner cylinder is only properly increased; besides the splicing concave part and the splicing convex part, the side part of the reinforcing plate is also provided with a fastening assembly which is used for further fixing the reinforcing plate and increasing the overall strength of the reinforcing plate.

Description

Technical Field

[0001] The utility model relates to the technical field of cement production devices, in particular to a thickened cement preheater inner cylinder. Background Art

[0002] In the cement production industry, the inner cylinder of the preheater is an important equipment to ensure the normal production of cement. In the rotary kiln preheater for cement production, the preheater needs to provide multi-stage co-current heat exchange between the raw material powder and the hot air at the kiln tail so that the raw material powder can finally enter the rotary kiln for calcination. The inner cylinder can provide sufficient dispersion time for the raw material powder. During this process, the working environment of the inner cylinder is very harsh, and it faces high temperature, alkali steam, sulfur steam and high-speed erosion of powder. At present, most of the existing preheater inner cylinders are hanging plate type, and the hanging plates are mainly cast with cast heat-resistant steel. Due to the harsh environment in the preheater, high temperature, alkali steam, sulfur steam and high-speed erosion of powder will greatly shorten the service life of the product, especially the four or five-level preheater hanging plates, which have a life of only about one year. In view of the shortcomings of the current hanging plate preheater inner cylinder, an integrated preheater inner cylinder has been developed. The preheater inner cylinder includes a reinforcement plate of the middle layer, and a refractory material layer is arranged on both sides of the reinforcement plate. After use, it is found that compared with the traditional hanging plate preheater inner cylinder, the service life of the preheater inner cylinder is greatly extended. It not only has good strength, but also has strong resistance to physical and chemical erosion. In the actual production and installation process, due to the installation space of the cement preheating equipment, the integrated preheater inner cylinder cannot be formed as a whole outside the equipment and then transported to the installation position. The integrated preheater inner cylinder needs to be transported to the installation position in a modular form and then installed as an integrated type. However, the coordination between the various components of the modular preheater inner cylinder is relatively difficult. If it is improperly installed, it is easy to cause the strength of the inner cylinder to decrease during use. During use, the upper module of the inner cylinder is more seriously affected by high temperature, alkali vapor, sulfur vapor and high-speed scouring of powder, which makes the upper module very easy to be damaged.

[0003] Application number: 201922018178.X, application date: 2019.11.20, the name of the utility model is a spliced ​​cement preheater inner cylinder, including a reinforcement plate, an outer layer castable and an inner layer castable, the outer layer castable and the inner layer castable are respectively arranged on both sides of the reinforcement plate; the reinforcement plate is composed of a plurality of single plates spliced ​​together, and the side of the single plate is provided with a splicing concave part and / or a splicing convex part. The splicing concave part of the single plate of this utility model cooperates with the splicing convex part of the adjacent single plate to ensure the stable splicing of the adjacent single plates on the one hand, and on the other hand, the splicing method of the concave-convex structure ensures the strength of the inner cylinder during use.

[0004] In the above-mentioned prior art, the inner cylinder of the preheater is modularized and then spliced, but the modular components are not differentiated, and the upper single plate has no reinforcement design. In addition, the single plates are fixed by spot welding. Under long-term high temperature, alkali steam, sulfur steam and high-speed erosion of powder, the heat-resistant steel thermal expansion and contraction welding points will generate stress, causing the welding points to be damaged. Utility Model Content

[0005] The upper monomer plate of the preheater inner cylinder is easily damaged under the conditions of long-term high temperature, alkali steam, sulfur steam and high-speed scouring of powder. In view of the fact that the modules in the prior art are the same, the upper monomer plate has no reinforcement design, and the monomer plates are fixed by spot welding. The thermal expansion and contraction welding points of the heat-resistant steel will produce stress, resulting in the defect of welding point damage. The purpose of the utility model is to provide a thickened cement preheater inner cylinder.

[0006] The technical solution provided by the utility model is:

[0007] A thickened cement preheater inner cylinder comprises a reinforcing plate and a castable, wherein the castable is used to integrally cover the reinforcing plate; the reinforcing plate is formed by splicing a plurality of thickened plates and ordinary plates; and the thickness of the thickened plate is greater than that of the ordinary plate.

[0008] Furthermore, the common plate includes a first common plate and a second common plate; the reinforcing plate is formed by splicing the main plate and the second common plate; and the main plate is formed by splicing the thickened plate and the first common plate located directly below the thickened plate.

[0009] Furthermore, the main plate is consistent with the second common plate in length; the thickened plate is shorter than the first common plate, and the length is the extension direction from the inner cylinder orifice to the hole bottom.

[0010] Furthermore, the upper parts of the reinforcement plates are uniformly configured as thickened plates, and the ordinary plates are located below the thickened plates.

[0011] Furthermore, a plurality of positioning holes are evenly distributed on the upper portion of the reinforcing plate; the positioning holes are used in conjunction with a positioning and fixing assembly to fix the reinforcing plate in the cement preheater.

[0012] Furthermore, the positioning and fixing assembly includes a cone sleeve and a sleeve matched with the cone sleeve; the cone sleeve and the sleeve are arranged on both sides of the reinforcing plate along the thickness direction; the positioning and fixing assembly also includes a fixing part, which is inserted into the cone sleeve, the positioning hole and the sleeve in sequence to fix the reinforcing plate in the cement preheater.

[0013] Furthermore, the positioning and fixing assembly also includes a cylinder, the cylinder is provided with a through hole corresponding to the sleeve, and the fixing part passes through the through hole; the cylinder is fixedly installed in the cement preheater.

[0014] Furthermore, the thickened plate and the ordinary plate are both provided with splicing recesses and / or splicing protrusions on the sides; the splicing recesses are matched with the splicing protrusions of the adjacent plates; and the reinforced plate is integrally spliced ​​by the coordinated use of the splicing recesses and the splicing protrusions.

[0015] Furthermore, a fastening assembly is provided at the joint of the reinforcing plate, and the fastening assembly is used to fix adjacent panels of the reinforcing plate.

[0016] Furthermore, the fastening assembly is a second bolt and a second nut matched with the second bolt.

[0017] Compared with the prior art, the technical solution provided by the utility model has the following beneficial effects:

[0018] The inner tube of the utility model comprises a reinforcing plate, which is assembled by splicing a thickened plate and an ordinary plate, so as to ensure the strength of the upper part of the inner tube, and the overall weight of the inner tube is only moderately increased; in addition to the splicing concave part and the splicing convex part, the side of the reinforcing plate is also provided with a fastening component for further fixing the reinforcing plate to increase its overall strength. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a partial front view of an inner cylinder of a thickened cement preheater in one embodiment of the present application;

[0020] Figure 2 This is a front view of a second structure of an inner cylinder of a thickened cement preheater in an embodiment of the present application;

[0021] Figure 3 It is a partial top view of an inner cylinder of a thickened cement preheater in one embodiment of the present application;

[0022] Figure 4 This is a schematic diagram of the partial structure of an inner cylinder of a thickened cement preheater in one embodiment of the present application;

[0023] Figure 5 It is a partially enlarged schematic diagram of an inner cylinder of a thickened cement preheater in one embodiment of the present application;

[0024] Figure 6 This is a schematic diagram of disassembling a positioning and fixing component in one embodiment of the present application;

[0025] Figure 7 This is a schematic diagram of the disassembly of the positioning and fixing component at another angle in an embodiment of the present application.

[0026] Explanation of the symbols in the schematic diagram:

[0027] Reinforced plate 1, thickened plate 11, ordinary plate 12, first ordinary plate 121, second ordinary plate 122, positioning hole 13, splicing concave portion 14, splicing convex portion 15, second bolt 16, second nut 17;

[0028] Cone sleeve 21 , sleeve 22 , cylinder body 23 , through hole 231 , first bolt 24 , first nut 25 . DETAILED DESCRIPTION

[0029] In order to further understand the content of the utility model, the utility model is described in detail in conjunction with the drawings and embodiments.

[0030] The structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention, so they have no substantial technical significance. Any modification of the structure, change of the proportion relationship or adjustment of the size, without affecting the effects and purposes that can be achieved by the present invention, should still fall within the scope of the technical content disclosed by the present utility model. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and so on quoted in this specification are only for the convenience of description, and are not used to limit the scope of implementation. The change or adjustment of their relative relationship should also be regarded as the scope of implementation of the present invention without substantially changing the technical content.

[0031] Example 1

[0032] A thickened cement preheater inner cylinder in this embodiment includes a reinforcing plate 1 and a castable. The reinforcing plate 1 is preferably a steel plate, which is used to enhance the strength of the cement preheater inner cylinder. The material of the reinforcing plate 1 is not limited to the steel plate, and any material that can play a good supporting role can be used. The reinforcing plate 1 castable is cast on both the inner and outer sides of the reinforcing plate 1 to cover the reinforcing plate 1 as a whole.

[0033] The reinforcing plate 1 is formed by splicing a main plate and a common plate 12, wherein the common plate 12 includes a first common plate 121 and a second common plate 122, and the main plate is formed by splicing a thickened plate 11 and a first common plate 121. The first common plate 121 is located directly below the thickened plate 11, and the length of the thickened plate 11 and the first common plate 121 after splicing is the same as the length of the second common plate 122. The main plate and the second common plate 122 are spaced apart.

[0034] During the use of the cement preheater inner cylinder, the upper module of the inner cylinder is subjected to more severe conditions of high temperature, alkaline steam, sulfur steam and high-speed erosion of powder, which makes the upper module extremely easy to be damaged. Therefore, the thickening plate 11 is used to enhance the overall strength of the upper part of the inner cylinder. The height of the thickening plate 11 is not less than 1m, and its thickness is greater than that of the ordinary plate 12. Preferably, the thickness of the thickening plate 11 is not less than 16mm, and the thickness of the ordinary plate 12 is not less than 8mm. The thickness of the first ordinary plate 121 and the second ordinary plate 122 are the same, and the length of the thickening plate 11 is less than the length of the first ordinary plate 121, and the length is the extension direction from the inner cylinder orifice to the bottom of the hole.

[0035] The thickened plate 11 and the second common plate 122 are both provided with positioning holes 13 at the upper part, and the positioning holes 13 are used in conjunction with the positioning and fixing components to fix the reinforcing plate 1 to the upper part of the cement preheater.

[0036] The positioning and fixing assembly includes a cone sleeve 21, a sleeve 22, and a cylinder 23. The cylinder 23 is provided with a through hole 231 corresponding to the sleeve 22. The cone sleeve 21 and the sleeve 22 are arranged on opposite sides of the reinforcing plate 1 in the thickness direction. The fixing part passes through the cone sleeve 21, the positioning hole 13 of the reinforcing plate 1, the sleeve 22 and the cylinder 23 in sequence, and passes out from the through hole 231. The fixing part is used to connect the reinforcing plate 1 and the cylinder 2 as a whole. Preferably, the fixing part is a first bolt 24 and a first nut 25 matched with the first bolt 24.

[0037] In order to prevent the cone sleeve 21 and the sleeve 22 from being misaligned during the connection process, the cross section of the cylinder 23 is set to be L-shaped, and the sleeve 23 is placed on the L-shaped horizontal edge of the cylinder 23. The two ends of the sleeve 23 correspond to the through hole 231 of the cylinder 23 and the positioning hole 13 of the reinforcing plate 1 respectively. The cone sleeve 21 is adapted to the positioning hole 13, and the outer diameter of the cone sleeve 21 is adapted to the inner diameter of the sleeve 22. The size of the through hole 231 on the cylinder 23 is adapted to the threaded portion of the first bolt 24.

[0038] The reinforcing plate 1 is composed of a plurality of thickened plates 11 and ordinary plates 12. The sides of the thickened plates 11 and ordinary plates 12 are provided with splicing recesses 14 and / or splicing protrusions 15. The adjacent plates are spliced ​​by the matching of the splicing recesses 14 and the splicing protrusions 15. On the one hand, the firmness of the splicing of the reinforcing plate 1 is ensured. On the other hand, the splicing method of the concave-convex structure can avoid excessive deformation of the connection between adjacent plates at high temperatures, thereby ensuring the strength of the inner tube during use. It should also be noted that a gap is provided at the connection between adjacent plates, and the spacing of the gap is 1 to 5 mm. The setting of the gap is conducive to further preventing excessive deformation of the connection between adjacent plates at high temperatures. The reinforcing plate 1 further ensures the stable splicing of adjacent plates at the splicing point through fasteners. The fasteners are preferably second bolts 16 and second nuts 17 adapted to the second bolts 16. When the reinforcing plate 1 is deformed by temperature, the fasteners can produce appropriate elastic deformation to adapt to the deformation of the reinforcing plate 1.

[0039] Example 2

[0040] The thickened cement preheater inner cylinder in this embodiment has a slightly different structure from that in Embodiment 1. The reinforcing plate 1 is composed of a plurality of thickened plates 11 and ordinary plates 12. The upper part of the reinforcing plate 1 is the thickened plate 11, and the lower part of the thickened plate 11 is the ordinary plate 12. In this embodiment, the length of the thickened plate 11 is not less than 0.8m, and the length of the thickened plate 11 is less than the length of the ordinary plate 12, where the length is the extension direction from the inner cylinder hole to the bottom of the hole, the thickness of the thickened plate 11 is not less than 14mm, and the thickness of the ordinary plate 12 is not less than 8mm. The arrangement of the remaining parts is the same as that in Embodiment 1.

[0041] The reason why the inner tube is not uniformly set as a thickening plate 11 is that the entire inner tube has a large area. If all are set as thickening plates 11, the weight of the reinforcing plate 1 will inevitably increase significantly, which may easily cause the reinforcing plate 1 to separate from the castable.

[0042] The above schematically describes the present invention and its implementation methods, which are not restrictive. The drawings show only one implementation method of the present invention, and the actual structure is not limited thereto. Therefore, if ordinary technicians in this field are inspired by it and design structural methods and embodiments similar to the technical solution without creativity without departing from the purpose of the present invention, they should all fall within the protection scope of the present invention.

Claims

1. A thickened cement preheater inner cylinder, characterized in that: It comprises a reinforcing plate (1) and a casting material, wherein the casting material is used to integrally cover the reinforcing plate (1); the reinforcing plate (1) is formed by splicing a plurality of thickened plates (11) and ordinary plates (12); the thickness of the thickened plates (11) is greater than the thickness of the ordinary plates (12).

2. The thickened cement preheater inner cylinder according to claim 1, characterized in that: The common plate (12) comprises a first common plate (121) and a second common plate (122); the reinforcing plate (1) is formed by splicing a main plate and the second common plate (122); the main plate is formed by splicing a thickened plate (11) and a first common plate (121) located directly below the thickened plate (11).

3. The thickened cement preheater inner cylinder according to claim 2, characterized in that: The main plate is consistent in length with the second common plate (122); the thickened plate (11) is shorter than the first common plate (121), and the length is the extension direction from the inner cylinder hole opening to the hole bottom.

4. The thickened cement preheater inner cylinder according to claim 1, characterized in that: The upper part of the reinforcing plate (1) is uniformly configured as a thickened plate (11), and the ordinary plate (12) is located below the thickened plate (11).

5. The thickened cement preheater inner cylinder according to claim 1, characterized in that: A plurality of positioning holes (13) are evenly distributed on the upper part of the reinforcing plate (1); the positioning holes (13) are used in conjunction with a positioning and fixing assembly to fix the reinforcing plate (1) in the cement preheater.

6. The thickened cement preheater inner cylinder according to claim 5, characterized in that: The positioning and fixing assembly comprises a cone sleeve (21) and a sleeve (22) matched with the cone sleeve (21); the cone sleeve (21) and the sleeve (22) are arranged on both sides of the reinforcing plate (1) along the thickness direction; the positioning and fixing assembly also comprises a fixing part, which is inserted into the cone sleeve (21), the positioning hole (13) and the sleeve (22) in sequence and is used to fix the reinforcing plate (1) in the cement preheater.

7. The thickened cement preheater inner cylinder according to claim 6, characterized in that: The positioning and fixing assembly further comprises a cylinder (23), the cylinder (23) being provided with a through hole (231) corresponding to the sleeve (22), and the fixing portion passing through the through hole (231); the cylinder (23) is fixedly installed in the cement preheater.

8. The thickened cement preheater inner cylinder according to claim 1, characterized in that: The thickened plate (11) and the ordinary plate (12) are both provided with a splicing recess (14) and / or a splicing protrusion (15) on the side; the splicing recess (14) is matched with the splicing protrusion (15) of the adjacent plate; the reinforced plate (1) is integrally spliced ​​by the coordinated use of the splicing recess (14) and the splicing protrusion (15).

9. The thickened cement preheater inner cylinder according to claim 1, characterized in that: A fastening assembly is also provided at the joint of the reinforcing plate (1), and the fastening assembly is used to fix adjacent panels of the reinforcing plate (1).

10. The thickened cement preheater inner cylinder according to claim 9, characterized in that: The fastening assembly comprises a second bolt (16) and a second nut (17) matched with the second bolt (16).

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