Rotary kiln segmented force relief brick

Abstract

The utility model relates to the technical field of firebrick for rotary kiln, concretely relates to a rotary kiln segmented force releasing brick. Including force releasing firebrick body, the force releasing firebrick body is built in the inner wall of rotary kiln along the circumference, and the force releasing firebrick body is spaced distribution along the length direction of rotary kiln. Rotary kiln is obliquely arranged along its length direction, the force releasing firebrick body is close to one side of the lower end of rotary kiln and is equipped with force releasing avoidance gap, the steel shell inner wall of rotary kiln is equipped with the protruding piece corresponding cooperation with force releasing avoidance gap. The utility model discloses a rotary kiln segmented force releasing brick realizes gradually releasing force, reduces stress concentration and bottom stress through specific structure design, facilitates installation positioning and prevents the site, and the heat preservation effect is considered, effectively prolongs the service life of firebrick and improves the stability and reliability of rotary kiln operation.

Description

Technical Field

[0001] This utility model relates to the technical field of refractory bricks for rotary kilns, specifically to a segmented unloading brick for rotary kilns. Background Technology

[0002] Rotary kilns are an indispensable key piece of equipment in many industrial production fields, widely used in industries such as cement, metallurgy, chemicals, and building materials, undertaking important processes such as material calcination, heating, and reaction. Rotary kilns are typically long and cylindrical, installed at a certain angle. Through slow rotation, the material is continuously tumbled and moved within the kiln, thereby achieving uniform heating and processing.

[0003] Due to the tilt of the rotary kiln, materials move and accumulate towards the lower end (bottom) of the kiln under gravity. During the rotation of the rotary kiln, compressive forces inevitably arise between adjacent refractory bricks. This compressive force is unevenly distributed along the length of the kiln, increasing towards the bottom. Refractory bricks at the bottom end, in particular, bear not only the immense compressive forces from the material above and adjacent bricks but also thermal stress. Under repeated pressure and thermal stress, stress concentration occurs on the brick surface. When the stress exceeds the material's bonding strength, the surface material peels off. Peeling not only reduces the effective thickness of the refractory brick, lowering its insulation performance, but may also cause fragments to fall into the material, affecting product quality. Cracking occurs when internal cracks appear in the refractory brick. With continued pressure and thermal stress, these cracks expand and extend, eventually leading to the complete breakage of the refractory brick. This also affects the normal operation of the kiln and shortens its service life. Utility Model Content

[0004] This invention provides a segmented stress-relief brick for rotary kilns, which solves the technical problem of damage to refractory bricks at the bottom port of rotary kilns caused by the combined effects of enormous pressure and thermal stress in the prior art.

[0005] To solve the above problems, the present invention provides a rotary kiln segmented unloading brick with the following technical solution: It includes a stress-relieving refractory brick body, which is circumferentially built on the inner wall of the rotary kiln and is distributed at intervals along the length of the rotary kiln.

[0006] The rotary kiln is inclined along its length. The unloading refractory brick body is provided with an unloading clearance notch on the side close to the lower end of the rotary kiln. The inner wall of the steel shell of the rotary kiln is provided with protrusions that correspond to and cooperate with the unloading clearance notch.

[0007] Furthermore, the stress-relieving refractory brick body is rectangular with a stress-relieving clearance notch located at one of its apex corners, and the bottom and sides of the stress-relieving clearance notch are externally connected.

[0008] Furthermore, an arc-shaped chamfer is formed at the junction of the top edge and the inner edge of the force relief clearance notch.

[0009] Furthermore, the bottom of the stress-relieving refractory brick body is provided with an outwardly expanding clearance opening, which is triangular in shape.

[0010] Furthermore, the angle α between the guide bevel and the bottom edge of the outwardly expanding clearance is 45°.

[0011] Furthermore, a trapezoidal positioning groove is provided at the top of the stress-relieving refractory brick body, wherein the bottom width of the trapezoidal positioning groove is greater than the top width and less than the width of the horizontal section at the top of the stress-relieving refractory brick body.

[0012] Furthermore, the length of the stress-relieving refractory brick body is L1, the length of the stress-relieving clearance notch is L2, where L1∶L2=5-6∶1, and the height of the trapezoidal positioning groove is H1, where H1∶L2=1∶5.

[0013] Furthermore, the distance between two adjacent unloading refractory brick bodies along the length direction of the rotary kiln is 10-15m.

[0014] Furthermore, the thickness of the protrusion is consistent with the thickness of the stress-relieving refractory brick body.

[0015] 1. The beneficial effects of the rotary kiln segmented unloading brick provided by this utility model are: 1. This utility model is used in rotary kilns installed at an angle, where the refractory bricks at the lower end of the kiln are subjected to high stress and are easily damaged. By constructing a ring of stress-relief refractory bricks every 10-15m, and utilizing the stress-relief clearance notch to engage with the protrusions on the inner wall of the steel shell, the protrusions share some of the pressure, gradually relieving stress from the upper end of the rotary kiln to the lower end. This prevents the bottom refractory bricks from bearing excessive pressure, effectively extending the service life of the refractory bricks and reducing the maintenance cost and downtime of the rotary kiln.

[0016] 2. In this utility model, the junction of the top edge and inner side of the stress-relief notch is provided with an arc-shaped chamfer. When the refractory brick is under stress, it can disperse the stress at the notch, prevent cracking, improve the strength and durability of the refractory brick, and further ensure the stability of the refractory brick under complex stress environments. The trapezoidal positioning groove provided on the top of the stress-relief refractory brick body can ensure the accuracy and stability of the masonry, improve the overall structural quality of the rotary kiln inner wall, make the refractory bricks neatly arranged, reduce gaps, and enhance the sealing of the kiln body.

[0017] 3. The triangular outward-expanding relief opening at the bottom of the stress-relief refractory brick body in this utility model has a guide hypotenuse with an angle of 45° with the bottom edge. During installation and use, it can play a role in avoiding and buffering, which helps to disperse the force, reduce the concentrated pressure on the bottom, and reduce the possibility of damage to the bottom refractory brick due to uneven force. Attached Figure Description

[0018] The above and other objects, features, and advantages of the present invention will become readily understood by reading the following detailed description of exemplary embodiments with reference to the accompanying drawings. In the drawings, several embodiments of the present invention are shown by way of example and not limitation, and like or corresponding reference numerals denote like or corresponding parts, wherein: Figure 1 This is a schematic diagram of the structure of the stress-relief refractory brick body of this utility model; Figure 2 This is a schematic diagram showing the arrangement of the stress-relieving refractory brick body along the length of the rotary kiln.

[0019] Explanation of reference numerals in the attached figures: 1. Unloading refractory brick body; 2. Unloading clearance notch; 21. Curved chamfer; 22. Outwardly flared clearance opening; 23. Trapezoidal positioning groove; 3. Protrusion. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Those skilled in the art should understand that the embodiments described below are only some, not all, of the embodiments disclosed. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0021] The number of any elements in the accompanying drawings is for illustrative purposes only and not as a limitation, and any naming is for distinction only and has no limiting meaning.

[0022] The principles and spirit of this utility model will be explained in detail below with reference to several representative embodiments.

[0023] An embodiment of a rotary kiln segmented unloading brick provided by this utility model: like Figures 1 to 2 As shown, It includes a stress-relieving refractory brick body 1, which is built circumferentially on the inner wall of the rotary kiln and is distributed at intervals along the length of the rotary kiln.

[0024] The rotary kiln is inclined along its length. A stress-relief refractory brick body 1 has a stress-relief clearance notch 2 on its side near the lower end of the rotary kiln. A protrusion 3, corresponding to and cooperating with the stress-relief clearance notch 2, is provided on the inner wall of the rotary kiln's steel shell. The thickness of the protrusion 3 is the same as the thickness of the stress-relief refractory brick body 1.

[0025] The distance between two adjacent unloading refractory brick bodies 1 along the length of the rotary kiln is 10-15m.

[0026] Because the rotary kiln has a certain degree of inclination, there will be compressive force between adjacent refractory bricks. The refractory bricks at the bottom end will bear greater force. Therefore, the refractory bricks at the bottom end are prone to peeling or cracking under the dual impact of huge pressure and thermal stress, which affects their service life.

[0027] By constructing a ring of stress-relieving refractory brick body 1 every 10-15m inside the rotary kiln, the protrusion 3 and the stress-relieving clearance gap 2 are engaged to abut against each other, so that the protrusion 3 can share part of the pressure, thereby achieving a gradual stress relief effect.

[0028] Specifically, protrusion 3 is a steel structure that is fixed to the inner wall of the rotary kiln's steel shell by the welding machine. This structural limitation avoids an excessive number and large area of ​​protrusion 3, which could affect the insulation effect, and also achieves a gradual stress relief effect from the high end to the low end of the rotary kiln.

[0029] In this embodiment, the unloading refractory brick body 1 is rectangular and the unloading clearance notch 2 is located at one of the top corners. The bottom and sides of the unloading clearance notch 2 are externally connected.

[0030] Among them, an arc-shaped chamfer 21 is formed at the junction of the top edge and the inner side of the unloading and avoidance gap 2.

[0031] The aforementioned stress relief notch 2 not only facilitates the cooperation with the protrusion 3, but the arc-shaped chamfer 21 can also reduce stress concentration, prevent cracks from forming at the notch, and improve the strength and durability of the refractory brick.

[0032] In this embodiment, the bottom of the stress-relief refractory brick body 1 is provided with an outwardly expanding clearance opening 22, which is triangular in shape.

[0033] The angle α between the guide hypotenuse and the bottom edge of the outward expansion clearance 22 is 45°.

[0034] The bottom of the stress-relief refractory brick body 1 is provided with a triangular outward-expanding clearance opening, and the angle between the guide hypotenuse and the bottom edge is 45°. This provides a certain degree of clearance and buffering during installation or use, and also helps to disperse force.

[0035] In this embodiment, a trapezoidal positioning groove 23 is provided at the top of the stress-relieving refractory brick body 1. The bottom width of the trapezoidal positioning groove 23 is greater than the top width and less than the width of the horizontal section at the top of the stress-relieving refractory brick body 1.

[0036] The length of the unloading refractory brick body 1 is L1, the length of the unloading clearance notch 2 is L2, and L1∶L2=5-6∶1. The height of the trapezoidal positioning groove 23 is H1, and H1∶L2=1∶5.

[0037] The top is provided with a trapezoidal positioning groove 23, the width of the bottom side is greater than the width of the top side but less than the width of the horizontal section at the top of the unloading refractory brick body 1. The trapezoidal positioning groove 23 can facilitate the positioning of the unloading refractory brick body 1 during construction, ensuring the accuracy and stability of the construction, improving the overall structural quality of the rotary kiln inner wall, and at the same time preventing the unloading refractory brick body 1 from shifting in the circumferential direction.

[0038] In practice, a ring of stress-relieving refractory brick body 1 is built every 10-15m in the rotary kiln. Through the cooperation of the stress-relieving refractory brick body 1 and the protrusion 3, a certain amount of supporting force is shared by the protrusion 3, thereby gradually relieving the force and preventing the refractory bricks at the bottom of the rotary kiln from being subjected to excessive force, which would affect their service life.

[0039] Based on the above description in this specification, those skilled in the art will also understand that the following terms used, such as "upper," "lower," "front," "rear," "left," "right," "width," "horizontal," "top," "bottom," "inner," and "outer," are terms indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings of this specification. They are only for the purpose of facilitating the explanation of the present invention and simplifying the description, and do not explicitly or implicitly suggest that the device or element involved must have the specific orientation, or be constructed and operated in a specific orientation. Therefore, the above-mentioned orientation or positional relationship terms should not be understood or interpreted as limitations on the present invention.

[0040] In addition, in the description of this specification, "multiple" means at least two, such as two, three or more, etc., unless otherwise expressly and specifically defined.

Claims

1. Rotary kiln segmented unloading bricks, characterized in that, Includes a stress-relief refractory brick body (1), wherein the stress-relief refractory brick body (1) The unloading refractory bricks are laid along the circumferential direction on the inner wall of the rotary kiln and are distributed at intervals along the length of the rotary kiln. The rotary kiln is inclined along its length. The unloading refractory brick body (1) is provided with an unloading clearance notch (2) on the side close to the lower end of the rotary kiln. The inner wall of the steel shell of the rotary kiln is provided with a protrusion (3) that corresponds to and cooperates with the unloading clearance notch (2).

2. The rotary kiln segmented unloading brick according to claim 1, characterized in that, The stress-relief refractory brick body (1) is in the shape of The rectangular unloading and avoidance gap (2) is located at one of its apex corners, and the bottom and sides of the unloading and avoidance gap (2) are externally connected.

3. The rotary kiln segmented unloading brick according to claim 2, characterized in that, The top edge of the unloading clearance notch (2) An arc-shaped chamfer is formed at the junction with the inner side (21).

4. The rotary kiln segmented unloading brick according to claim 2, characterized in that, The stress-relief refractory brick body (1) The bottom is provided with an outwardly expanding clearance opening (22), which is triangular in shape.

5. The rotary kiln segmented unloading brick according to claim 4, characterized in that, The guide of the outwardly flared clearance (22) The angle α between the hypotenuse and the base is 45°.

6. The rotary kiln segmented unloading brick according to claim 2, characterized in that, The top of the stress-relief refractory brick body (1) is provided with There is a trapezoidal positioning groove (23), the bottom width of which is greater than the top width and less than the width of the horizontal section at the top of the stress-relieving refractory brick body (1).

7. The rotary kiln segmented unloading brick according to claim 6, characterized in that, The length of the unloading refractory brick body (1) is L1, the length of the unloading clearance notch (2) is L2, where L1∶L2=(5-6)∶1, and the height of the trapezoidal positioning groove (23) is H1, where H1∶L2=1∶5.

8. The rotary kiln segmented unloading brick according to claim 1, characterized in that, The phase along the length direction of the rotary kiln The distance between the two nearest unloading refractory brick bodies (1) is 10-15m.

9. The rotary kiln segmented unloading brick according to claim 1, characterized in that, The thickness of the protrusion (3) is the same as the thickness of the stress-relieving refractory brick body (1).

Images