A spliced ​​cement preheater inner cylinder

Abstract

The present invention discloses a spliced ​​cement preheater inner cylinder, belonging to the technical field of cement production equipment. The present invention comprises a reinforcing plate, an outer layer castable and an inner layer castable, wherein the outer layer castable and the inner layer castable are respectively arranged on both sides of the reinforcing plate; the reinforcing plate is composed of a plurality of monomer plates spliced ​​together, and the sides of the monomer plates are provided with splicing recesses and / or splicing protrusions. The splicing recesses of the monomer plates of the present invention cooperate with the splicing protrusions of the adjacent monomer plates to ensure the stable splicing of the adjacent monomer plates on the one hand, and the splicing method of the concave-convex structure ensures the strength of the inner cylinder during use on the other hand.

Description

Technical Field

[0001] The invention relates to the technical field of cement production devices, and more particularly to a spliced ​​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 for 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 vapor, sulfur vapor and high-speed erosion of powder.

[0003] At present, most of the existing preheater inner tubes are hanging plate type, and the hanging plate is 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- and five-level preheater hanging plates, which have a life of only about one year. In view of the shortcomings of the current hanging plate type preheater inner tube, the inventor has previously developed an integrated preheater inner tube, which includes a reinforcing plate of the middle layer, and a refractory material layer is arranged on both sides of the reinforcing plate. After use, it is found that compared with the traditional hanging plate type preheater inner tube, the service life of the preheater inner tube is greatly extended, and it not only has good strength, but also has strong resistance to physical and chemical erosion.

[0004] However, the inventors found during the actual production and installation process that 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 a whole. However, the coordination between the various components of the modular preheater inner cylinder is relatively difficult. If the installation is improper, it is easy to cause the strength of the inner cylinder to decrease during use. Summary of the invention

[0005] 1. Technical problem to be solved by the invention

[0006] The purpose of the present invention is to provide a spliced ​​cement preheater inner cylinder to solve the technical problem that the overall strength of the inner cylinder of an integrated preheater is reduced due to improper connection of the inner cylinder components; the strength of the overall preheater inner cylinder after assembly is improved by splicing the monomer plates of the inner cylinder through a specific splicing method.

[0007] 2. Technical solution

[0008] In order to achieve the above object, the technical solution provided by the present invention is:

[0009] A spliced ​​cement preheater inner cylinder of the present invention comprises a reinforcing plate, an outer layer castable and an inner layer castable, wherein the outer layer castable and the inner layer castable are respectively arranged on both sides of the reinforcing plate; the reinforcing plate is composed of a plurality of single plates spliced ​​together, and the sides of the single plates are provided with splicing recesses and / or splicing protrusions, the splicing recesses of the single plates cooperate with the splicing protrusions of the adjacent single plates, and the adjacent single plates are spliced ​​together through the cooperation of the splicing recesses and the splicing protrusions.

[0010] Preferably, along the direction away from the side of the single plate, the length of the splicing concave portion in the vertical direction gradually decreases, and the cross-sectional area of ​​the splicing convex portion gradually increases.

[0011] Preferably, the splicing recess is a dovetail groove.

[0012] Preferably, the reinforcing plate is provided with a plurality of through holes, the through holes penetrate through both sides of the reinforcing plate, and the outer layer castable and the inner layer castable are connected through the through holes.

[0013] Preferably, a fixing installation hole is provided on the reinforcing plate, a fixing is installed in the fixing installation hole, the fixing extends from the reinforcing plate to both sides of the reinforcing plate, and the fixing is embedded in the outer layer casting material and the inner layer casting material.

[0014] Preferably, the length of the splicing concave portion and the splicing convex portion is L, and 80cm≤L≤300cm.

[0015] Preferably, the angle between the inner side of the dovetail groove and the groove bottom is α, wherein 20°≤α≤70°.

[0016] Preferably, along the circumferential direction of the inner cylinder, the through holes are arranged in columns on the reinforcing plate, the distances between adjacent columns are equal, and the distances between adjacent through holes in the same column are equal; and / or the width of the reinforcing plate is W, the distance between adjacent columns of through holes is d, d=W / k, and 2.5≤k≤3.5.

[0017] Preferably, the fixing member is a cross-arranged fixing nail, and the intersection of the fixing nails is fixed in the fixing member installation hole.

[0018] Preferably, a fixing member installation hole is provided on the splicing protrusion, and a fixing member is installed in the fixing member installation hole.

[0019] 3. Beneficial effects

[0020] Compared with the existing known technologies, the technical solution provided by the present invention has the following significant effects:

[0021] (1) A spliced ​​cement preheater inner cylinder of the present invention comprises a reinforcing plate, an outer layer castable and an inner layer castable, wherein the outer layer castable and the inner layer castable are respectively arranged on both sides of the reinforcing plate; the reinforcing plate is composed of a plurality of single plates spliced ​​together, and the sides of the single plates are provided with splicing recesses and / or splicing protrusions, wherein the splicing recesses of the single plates cooperate with the splicing protrusions of the adjacent single plates; the adjacent single plates are spliced ​​together by the cooperation of the splicing recesses and the splicing protrusions, and the splicing by the cooperation of the splicing recesses and the splicing protrusions ensures 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 can avoid excessive deformation of the connection between the adjacent single plates when the temperature changes, thereby ensuring the strength of the inner cylinder during use.

[0022] (2) In the spliced ​​cement preheater inner cylinder of the present invention, a plurality of through holes are arranged on the reinforcing plate, and the through holes penetrate both sides of the reinforcing plate. The outer layer castable and the inner layer castable are connected through the through holes, so that the outer layer castable and the inner layer castable become one, thereby improving the bonding strength of the outer layer castable and the inner layer castable on the reinforcing plate.

[0023] (3) In the spliced ​​cement preheater inner cylinder of the present invention, the through holes are evenly distributed in columns on the reinforcing plate, and the through holes in adjacent columns are staggered. While the castables on both sides of the reinforcing plate can be effectively combined, the reasonable arrangement of the through holes can avoid the loss of strength of the reinforcing plate after punching.

[0024] (4) In the spliced ​​cement preheater inner cylinder of the present invention, a fixing installation hole is provided on the reinforcing plate, and a fixing is installed in the fixing installation hole. The fixing extends from the reinforcing plate to both sides of the reinforcing plate, and the fixing is embedded in the outer layer castable and the inner layer castable, which not only strengthens the bonding effect between the single-side castable and the reinforcing plate, but also improves the bonding strength between the outer layer castable and the inner layer castable, thereby greatly improving the overall strength of the inner cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the inner cylinder structure of a spliced ​​cement preheater of the present invention;

[0026] Figure 2 A top view of a spliced ​​cement preheater of the present invention;

[0027] Figure 3 This is a cross-sectional view of the inner cylinder of a spliced ​​cement preheater of the present invention;

[0028] Figure 4 It is a cross-sectional schematic diagram of a through hole on the inner cylinder of a spliced ​​cement preheater of the present invention;

[0029] Figure 5 This is a schematic diagram of the distribution of through holes on the inner cylinder of a spliced ​​cement preheater of the present invention;

[0030] Figure 6 It is a schematic diagram of the distribution of fixing parts on the cross section of the inner cylinder of a spliced ​​cement preheater of the present invention;

[0031] Figure 7 Schematic diagram of welding adjacent single panels.

[0032] Explanation of the symbols in the schematic diagram:

[0033] 101, outer layer casting material; 102, inner layer casting material; 110, reinforcement plate; 111, single plate; 120, through hole; 121, end of strip hole; 122, contraction section; 131, first fixing part mounting hole; 132, second fixing part mounting hole; 141, first fixing part; 142, second fixing part; 151, splicing concave part; 152, splicing convex part. DETAILED DESCRIPTION

[0034] In order to further understand the content of the present invention, the present invention is described in detail in conjunction with the accompanying drawings and embodiments.

[0035] 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 produced by the present invention, should still fall within the scope of the technical content disclosed by the present invention. 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 substantial change of the technical content; in addition, the various embodiments of the present invention are not independent of each other, but can be combined.

[0036] Example 1

[0037] like Figures 1-2 As shown, a spliced ​​cement preheater inner cylinder of this embodiment includes a reinforcing plate 110, an outer layer castable 101 and an inner layer castable 102, and the outer layer castable 101 and the inner layer castable 102 are respectively arranged on both sides of the reinforcing plate 110. The reinforcing plate 110 mainly plays the role of maintaining the overall strength of the inner cylinder in the structure of the inner cylinder, so as to better maintain the overall shape of the inner cylinder; in this embodiment, the reinforcing plate 110 is a steel plate, but the material of the reinforcing plate 110 is not limited to steel plate, and any material that can play a good role in supporting the internal shape can be used. The outer layer castable 101 and the inner layer castable 102 are generally refractory materials, which are responsible for directly contacting the hot air in the cement preheater.

[0038] The reinforcing plate 110 is composed of a plurality of single plates 111 spliced ​​together, and the side of the single plate 111 is provided with a splicing recess 151 and / or a splicing protrusion 152, and the adjacent single plates 111 are spliced ​​together through the cooperation of the splicing recess 151 and the splicing protrusion 152. The splicing by the cooperation of the splicing recess 151 and the splicing protrusion 152 can ensure the stable splicing of the adjacent single plates 111 on the one hand, and on the other hand, the splicing method of the concave-convex structure can avoid excessive deformation of the connection between the adjacent single plates 111 when the temperature changes, thereby ensuring the strength of the inner tube during use. It should also be noted that a gap is provided at the connection between the adjacent single plates 111, and the spacing of the gap is 1 to 5 mm; the adjacent single plates 111 are welded and connected, and in this embodiment, it is also as shown Figure 7 As shown, a gap is provided between the inner and outer welding points, and the provision of the gap is beneficial to further ensure that the connection between adjacent single plates 111 does not undergo excessive deformation when the temperature changes.

[0039] The splicing concave portion 151 and the splicing convex portion 152 are gradually reduced in length in the vertical direction away from the side of the single plate 111, and the cross-sectional area of ​​the splicing convex portion 152 is gradually increased. The splicing concave portion 151 and the splicing convex portion 152 can also have various shapes, such as Figure 1 The trapezoidal shape shown in FIG. 1 may also be circular, elliptical or other special shapes. In this embodiment, Figure 1 The trapezoidal splicing concave portion 151 shown in the figure is a dovetail groove; the inner side of the dovetail groove matches the side of the splicing convex portion 152, and the inner side of the dovetail groove and the bottom of the groove are arranged at an angle. The inclined surface formed by the angle can ensure that there is no relative movement in the horizontal direction between adjacent monomer plates 111, and avoid the outer layer castable 101 and the inner layer castable 102 outside the reinforcing plate 110 from being broken due to the relative movement in the horizontal direction between adjacent monomer plates 111; thereby improving the overall strength of the inner tube. The angle is α, where 20°≤α≤70°, and α of 20°, 33° or 70° can achieve better results. In this embodiment, α=56°.

[0040] In addition, the height of the reinforcing plate 110 is 1000-4000 cm, the length of the splicing recess 151 and the splicing protrusion 152 is L, and the ratio of the height of the reinforcing plate 110 to L is 3-50. The ratio of 3, 25, 36 and 50 can achieve better results. In this embodiment, the ratio is 17. In this embodiment, the height of the reinforcing plate 110 is 3000 cm. 80 cm ≤ L ≤ 300 cm; in this embodiment, L = 170 cm.

[0041] like Figure 3 and Figure 5As shown, the reinforcing plate 110 is provided with a plurality of through holes 120, and the through holes 120 penetrate through both sides of the reinforcing plate 110; during the manufacturing process of the inner tube, the outer layer castable 101 and the inner layer castable 102 are respectively cast to the outer layer and the inner layer of the reinforcing plate 110. Due to the provision of the through holes 120 on the reinforcing plate 110, the outer layer castable 101 and the inner layer castable 102 are connected in the through holes 120 during the casting process; after the outer layer castable 101 and the inner layer castable 102 are solidified, the outer layer castable 101 and the inner layer castable 102 can form a whole through the connected parts in the through holes 120, and at this time, the outer layer castable 101 or the inner layer castable 102 on one side of the reinforcing plate 110 is difficult to fall off from the reinforcing plate 110, which greatly improves the overall strength of the inner tube.

[0042] It should be noted that the "through hole 120" described in this embodiment does not mean that the through part must be a round hole or a square hole with a small through area. The through hole 120 described in this embodiment is a long strip hole. During the casting process of the castable, setting the through hole 120 in a long strip shape is conducive to the castable entering the through hole 120, so that there is a sufficient amount of castable in the through hole 120 to combine the outer castable 101 and the inner castable 102. And the long strip through hole 120 has a larger connection area span as a whole, which is conducive to improving the strength of the outer castable 101 and the inner castable 102 connected as one.

[0043] In addition, the end 121 of the long strip-shaped through hole 120 described in this embodiment is arc-shaped. Setting the end as an arc can avoid the occurrence of a large turning angle. On the one hand, it is beneficial to minimize the reduction in strength of the reinforcing plate 110 due to the opening; on the other hand, it can avoid the occurrence of casting dead angles in the through hole 120, which makes it difficult to effectively fill the castable material.

[0044] In this embodiment, Figure 4 As shown, a contraction section 122 is provided at the transition between the end of the through hole 120 and the side of the reinforcing plate 110, and the cross-sectional area of ​​the contraction section 122 gradually decreases along the direction from the side of the reinforcing plate 110 to the inside of the through hole 120. The provision of the contraction section 122 can guide the castable material to enter the through hole 120 during the pouring process, and the provision of the contraction section 122 can enhance the connection strength between the castable material in the through hole 120 and the outer layer castable material 101 and the inner layer castable material 102, thereby further improving the overall strength.

[0045] It is worth mentioning that the through holes 120 are evenly distributed on the reinforcing plate 110. The even distribution of the through holes 120 on the reinforcing plate 110 is beneficial to ensure the effective combination of the outer layer castable 101 and the inner layer castable 102 on the one hand, and on the other hand, it also makes the overall strength of the reinforcing plate 110 uniform and avoids deformation during use.

[0046] In this embodiment, along the circumferential direction of the inner cylinder, the through holes 120 are arranged in columns on the reinforcing plate 110, the distances between adjacent columns are equal, and the distances between adjacent through holes 120 in the same column are equal; and the through holes 120 in adjacent columns are arranged in a staggered manner, and the staggered arrangement of the through holes 120 can reduce the strength lost after punching as much as possible. It should be noted that the width of the reinforcing plate 110 is W, the distance between adjacent columns of through holes 120 is d, d = W / k, 2.5≤k≤3.5, in this embodiment k = 3, W is 400-650cm, the column spacing between adjacent columns of through holes 120 is 133-216cm, in this embodiment W is 510cm, d = 170cm.

[0047] In this embodiment, the height of the reinforcing plate 110 is 1000-4000 cm, and the length of the through hole 120 is 50-180 cm. In this embodiment, the height of the reinforcing plate 110 is 3000 cm, and the length of the through hole 120 is 120 cm. The inventors found that through the above arrangement, the outer layer casting material 101 and the inner layer casting material 102 have good bonding ability, and the reinforcing plate 110 has good strength as a whole.

[0048] The reinforcing plate 110 is provided with a fixing installation hole, which passes through both sides of the reinforcing plate 110. Fixing parts are installed in the fixing installation holes, and the fixing parts extend from the reinforcing plate 110 to both sides of the reinforcing plate 110, and the fixing parts are embedded in the outer layer casting material 101 and the inner layer casting material 102. The fixing parts are embedded in the outer layer casting material 101 and the inner layer casting material 102, and the bonding strength between the reinforcing plate 110 and the outer layer casting material 101 and the inner layer casting material 102 is further improved through the fixing effect of the fixing parts.

[0049] In this embodiment, the fixing members are cross-arranged fixing nails such as Figure 6 As shown, the intersection of the fixing nails is fixed in the fixing installation hole. In this embodiment, the intersection of the fixing nails is fixed in the fixing installation hole by welding. On the one hand, the fixing nails tighten and fix the outer layer castable 101 and the inner layer castable 102 on the side of the reinforcing plate 110 through traction, so that the outer layer castable 101 and the inner layer castable 102 are not easy to fall off from the surface of the reinforcing plate 110. On the other hand, the setting of the fixing nails increases the friction force on the surface of the reinforcing plate 110, so that the outer layer castable 101 and the inner layer castable 102 are not easy to slip along the surface direction of the reinforcing plate 110, thereby further improving the bonding ability of the outer layer castable 101 and the inner layer castable 102 on the surface of the reinforcing plate 110. In addition, the fixing nails also directly connect the outer layer castable 101 and the inner layer castable 102 together, which is conducive to improving the bonding strength of the outer layer castable 101 and the inner layer castable 102.

[0050] The fixing member installation holes include a first fixing member installation hole 131 and a second fixing member installation hole 132. The first fixing member installation hole 131 and the second fixing member installation hole 132 are evenly and alternately arranged on the surface of the reinforcing plate 110. A first fixing member 141 is installed in the first fixing member installation hole 131, and a second fixing member 142 is installed in the second fixing member installation hole 132. The fixing directions of the first fixing member 141 and the second fixing member 142 are perpendicular. In this embodiment, the first fixing member 141 and the second fixing member 142 are both cross-arranged fixing nails, but the directions in which the first fixing member 141 and the second fixing member 142 are cross-arranged are perpendicular to each other. This arrangement enables the fixing member to fix the castable in different directions, further improving the bonding effect. In addition, the splicing protrusion 152 is provided with a fixing member installation hole, and a fixing member is installed in the fixing member installation hole.

[0051] The present invention has been described in detail above in conjunction with specific exemplary embodiments. However, it should be understood that various modifications and variations may be made without departing from the scope of the present invention as defined by the appended claims. The detailed description and the accompanying drawings should be considered only as illustrative and not restrictive, and if there are any such modifications and variations, they will fall within the scope of the present invention described herein. In addition, the background technology is intended to illustrate the current status and significance of the research and development of the present technology and is not intended to limit the present invention or the application field of the present application and the present invention.

[0052] More specifically, although exemplary embodiments of the present invention have been described herein, the present invention is not limited to these embodiments, but includes any and all embodiments that are recognizable by those skilled in the art based on the foregoing detailed description, such as combinations between the various embodiments, adaptive changes and / or replacements. The limitations in the claims may be interpreted broadly based on the language used in the claims and are not limited to the examples described in the foregoing detailed description or during the implementation of the application, which examples should be considered non-exclusive. Any steps listed in any method or process claim may be performed in any order and are not limited to the order presented in the claim. Therefore, the scope of the present invention should be determined solely by the attached claims and their legal equivalents, rather than by the description and examples given above.

Claims

1. A spliced ​​cement preheater inner cylinder, characterized in that: The invention comprises a reinforcing plate (110), an outer layer castable (101) and an inner layer castable (102), wherein the outer layer castable (101) and the inner layer castable (102) are respectively arranged on both sides of the reinforcing plate (110); the reinforcing plate (110) is composed of a plurality of monomer plates (111) spliced ​​together, and the sides of the monomer plates (111) are provided with splicing recesses (151) and / or splicing protrusions (152), and the splicing recesses (151) of the monomer plates (111) cooperate with the splicing protrusions (152) of the adjacent monomer plates (111), and the adjacent monomer plates (111) are spliced ​​together through the cooperation of the splicing recesses (151) and the splicing protrusions (152); A gap is provided at the connection between adjacent monomer plates (111); Adjacent single plates (111) are welded together, and a gap is provided between inner and outer welding points; A fixing member installation hole is provided on the reinforcing plate (110), a fixing member is installed in the fixing member installation hole, the fixing member extends from the reinforcing plate (110) to both sides of the reinforcing plate (110), and the fixing member is embedded in the outer layer casting material (101) and the inner layer casting material (102); The fixing member installation hole comprises a first fixing member installation hole (131) and a second fixing member installation hole (132); A first fixing member (141) is installed in the first fixing member installation hole (131), and a second fixing member (142) is installed in the second fixing member installation hole (132); The first fixing member (141) and the second fixing member (142) are both cross-arranged fixing nails, the cross-arrangement directions of the first fixing member (141) and the second fixing member (142) are perpendicular to each other, and the intersection of the fixing nails is fixed in the fixing member installation hole; The reinforcing plate (110) is provided with a plurality of through holes (120), the through holes (120) penetrate through both sides of the reinforcing plate (110), and the outer layer castable (101) and the inner layer castable (102) are connected via the through holes (120); Along the circumferential direction of the inner cylinder, the through holes (120) are arranged in columns on the reinforcing plate (110), the distances between adjacent columns are equal, and the distances between adjacent through holes (120) in the same column are equal; and / or the width of the reinforcing plate (110) is W, and the distance between adjacent columns of through holes (120) is d, d=W / k, wherein 2.5≤k≤3.

5.

2. The spliced ​​cement preheater inner cylinder according to claim 1, characterized in that: The splicing recess (151) is a dovetail groove.

3. The spliced ​​cement preheater inner cylinder according to claim 1, characterized in that: The length of the splicing concave portion (151) and the splicing convex portion (152) is L, wherein 80cm≤L≤300cm.

4. The spliced ​​cement preheater inner cylinder according to claim 2, characterized in that: The angle between the inner side of the dovetail groove and the bottom of the groove is α, wherein 20°≤α≤70°.

5. The spliced ​​cement preheater inner cylinder according to claim 1, characterized in that: The splicing convex portion (152) is provided with a fixing member installation hole, and a fixing member is installed in the fixing member installation hole.

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