Machine nozzle and mud extruding device for mullite bricks

Abstract

The utility model discloses a machine nozzle and a mud extruding device for mullite bricks, and relates to the technical field of brick making equipment, the machine nozzle comprises a forming cylinder used for forming green bricks, and the cross sectional areas of the forming cylinder are sequentially increased in the direction from a feed port to a discharge port of the forming cylinder; the cross section of the forming cylinder is trapezoidal, the forming cylinder comprises a first side face, a second side face, a third side face and a fourth side face which are sequentially connected, the first side face is parallel to the third side face, and the second side face and the fourth side face intersect. The machine nozzle is optimized, and the cross section of the forming cylinder is changed into a trapezoid from an original rectangle, so that the size of green bricks formed by the machine nozzle is reduced, the up-down lap joint of the green bricks is firmer when the green bricks are put into a kiln and stacked, the gap between the green bricks and the kiln is enlarged, the risk of deformation during sintering of the green bricks is reduced, and the appearance quality of the green bricks is effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of brick making equipment, in particular to a machine nozzle and a mud squeezing device for mullite bricks. Background Art

[0002] As the world's demand for energy conservation increases, the research and development of lightweight thermal insulation materials has developed rapidly. Mullite bricks, as ideal lightweight thermal insulation refractory materials, have the characteristics of good chemical stability, high temperature resistance, high dimensional accuracy, uniform structure, beautiful appearance, low thermal coefficient, etc. They are now widely used in hot blast furnaces, glass crucibles, metal melting furnaces, ceramic tunnel kilns, roller kilns, electric porcelain shuttle kilns, etc., and have broad market prospects.

[0003] Existing mullite bricks are made by using various refractory powders through a mud kneading machine and a mud extruder. The shape of the mud extruder nozzle is rectangular, and the mullite brick mud is a cuboid after being extruded through the nozzle. After the brick is formed, the corner structure is poor, the size is large, and the overall appearance quality is poor. Utility Model Content

[0004] The utility model aims to provide a machine nozzle and a mud extruding device for mullite bricks, which changes the cross section of the forming cylinder of the machine nozzle from the original rectangular to a trapezoidal shape, thereby solving the technical problem that the appearance quality of the bricks extruded by the existing machine nozzle is poor.

[0005] To achieve the above-mentioned purpose, the utility model provides a machine nozzle, including a forming cylinder for forming brick blanks, the cross-sectional area of ​​the forming cylinder increases successively in the direction from the feed port to the discharge port of the forming cylinder; the cross-section of the forming cylinder is trapezoidal, and the forming cylinder includes a first side surface, a second side surface, a third side surface and a fourth side surface which are connected in sequence, the first side surface is parallel to the third side surface, and the second side surface is intersecting with the fourth side surface.

[0006] Preferably, a first structural groove is formed at the intersection of the first side surface and the second side surface, and a second structural groove is formed at the intersection of the first side surface and the fourth side surface; the first structural groove and the second structural groove are symmetrically arranged; the first structural groove and the second structural groove are both arc grooves; the first structural groove and the second structural groove are both used to prevent the machine head from causing wear to the brick blank.

[0007] Preferably, a first protrusion for controlling the height of the mud strip is formed on the first side surface.

[0008] Preferably, the length of the first protrusion is half of the length of the first side surface.

[0009] Preferably, the first protrusion is located at the center of the first side surface.

[0010] Preferably, a second protrusion for reducing the size of the brick is formed at the bottom of the groove of the first protrusion.

[0011] Preferably, the second bump is located at the center of the first bump.

[0012] Preferably, the length of the second protrusion is one quarter of the length of the first side surface.

[0013] Preferably, the difference between the first side surface and the third side surface is within a set range.

[0014] The utility model also provides a mud squeezing device for mullite bricks, comprising the above-mentioned machine nozzle.

[0015] Compared with the background technology, the utility model optimizes the machine nozzle, and the cross-section of the forming cylinder is changed from the original rectangular to a trapezoidal shape, so that the size of the brick blanks after forming by the machine nozzle is reduced, the upper and lower overlaps of the brick blanks are more firmly when loading and stacking in the kiln, and the gaps between the brick blanks for loading and stacking in the kiln are enlarged, which reduces the risk of deformation of the brick blanks during sintering and effectively improves the appearance quality of the brick blanks. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0017] Figure 1 A schematic cross-sectional view of a forming cylinder of a nozzle provided by an embodiment of the utility model;

[0018] Figure 2 A three-dimensional diagram of a nozzle provided by an embodiment of the utility model;

[0019] Figure 3 for Figure 1 Longitudinal section view of .

[0020] The reference numerals are as follows:

[0021] A first side surface 1 , a second side surface 2 , a third side surface 3 , a fourth side surface 4 , a first structural groove 5 , a second structural groove 6 , a first protrusion 7 and a second protrusion 8 . DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] In order to enable those skilled in the art to better understand the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0024] The utility model embodiment discloses a machine nozzle, as shown in the attached Figures 1 to 3 As shown, it includes a forming cylinder for forming a brick blank, and the cross-sectional area of ​​the forming cylinder increases in sequence from the feed port to the discharge port of the forming cylinder. The cross-sectional area of ​​the forming cylinder is trapezoidal, and the forming cylinder includes a first side surface 1, a second side surface 2, a third side surface 3 and a fourth side surface 4 connected in sequence, wherein the first side surface 1 is parallel to the third side surface 3, and the length of the first side surface 1 is greater than the length of the third side surface 3. The second side surface 2 and the fourth side surface 4 are intersected and arranged, and the inclination angles of the two are the same, so that the four side surfaces form an isosceles trapezoid.

[0025] The utility model optimizes the machine nozzle, and the cross section of the forming cylinder is changed from the original rectangular to a trapezoidal shape, so that the size of the brick blank after forming by the machine nozzle is reduced, the upper and lower overlaps of the brick blank are more firmly connected when loading into the kiln and stacking, and the gap between the brick blanks for loading into the kiln and stacking is enlarged, thereby reducing the risk of deformation of the brick blanks during sintering, and effectively improving the appearance quality of the brick blanks.

[0026] A first structural groove 5 is formed at the intersection of the first side surface 1 and the second side surface 2, and a second structural groove 6 is formed at the intersection of the first side surface 1 and the fourth side surface 4; the first structural groove 5 and the second structural groove 6 are symmetrically arranged; the first structural groove 5 and the second structural groove 6 are both arc grooves, and the first structural groove 5 and the second structural groove 6 will not cause the angled machine head to have residual material at the angle due to long-term use, and utilize the expansion property and curvature of the mullite brick mud material to prevent the mud material coming out of the machine mouth from rubbing against the mud material at the angle, thereby preventing the corners of the brick blank after forming from being damaged. The four angle structures of the brick blank after forming and squeezing the mud are better, which is beneficial to further effectively improve the appearance quality of the brick blank.

[0027] The arc radius of both the first structural groove 5 and the second structural groove 6 is preferably 3 mm, but not limited thereto.

[0028] The first side surface 1 is formed with a first protrusion 7 for controlling the height of the mud strip to prevent the filler in the mullite brick from expanding after being extruded through the machine nozzle, thereby preventing the brick from arching after the mud is extruded and forming, and also helping to improve the appearance quality of the brick and avoid large size deviation of the brick.

[0029] The length of the first protrusion 7 is half of the length of the first side surface 1. The length of the first side surface 1 is between 230 mm and 240 mm, and the length of the first protrusion 7 is between 115 mm and 120 mm. The first protrusion 7 is located at the center of the first side surface 1, and the improvement effect is better.

[0030] Furthermore, a second protrusion 8 is formed at the bottom of the groove of the first protrusion 7, which is used to reduce the size of the brick, further reduce the size deviation of the brick, and is more conducive to improving the appearance quality of the brick. The second protrusion 8 is located at the center of the first protrusion 7. The length of the second protrusion 8 is one quarter of the length of the first side surface 1, and the length range of the second protrusion 8 is between 57 mm and 60 mm.

[0031] The difference between the first side surface 1 and the third side surface 3 is within a set range. The set range is 6 mm to 8 mm, and the difference between the first side surface 1 and the third side surface 3 is preferably 6 mm. Of course, the length of the first side surface 1 and the difference between the first side surface 1 and the third side surface 3 are not limited thereto.

[0032] In the first specific embodiment, the molding grade is 23 grade mullite brick, the length of the first side 1 is 234mm, the length of the first protrusion 7 is 117mm, the length of the second protrusion 8 is 58.5mm, the length of the third side 3 is 228mm, the radius of the first structural groove 5 and the second structural groove 6 are both 3mm, the size of the molded brick is 259x130x63mm, the upper and lower deviations of the appearance are less than or equal to 5mm, and the appearance quality is good.

[0033] In the second specific embodiment, the length of the first side 1 is 240mm, the length of the first protrusion 7 is 120mm, the length of the second protrusion 8 is 60mm, the length of the third side 3 is 224mm, the radius of the first structural groove 5 and the second structural groove 6 are both 3mm, the size of the formed brick is 264x132x66mm, the upper and lower deviations of the appearance are less than or equal to 5mm, and the appearance quality is good.

[0034] In the third specific embodiment, the length of the first side 1 is 238 mm, the length of the first protrusion 7 is 119 mm, the length of the second protrusion 8 is 59.5 mm, the length of the third side 3 is 232 mm, the radius of the first structural groove 5 and the second structural groove 6 are both 3 mm, the size of the formed brick is 264x132x66 mm, the upper and lower deviations of the appearance are less than or equal to 5 mm, and the appearance quality is good.

[0035] The embodiment of the utility model also discloses a mud squeezing device for mullite bricks, comprising the above-mentioned machine nozzle, and having the same beneficial effects.

[0036] It should be noted that, in this specification, relational terms such as first and second are merely used to distinguish one entity from other entities, but do not necessarily require or imply any actual relationship or order between these entities.

[0037] This article uses specific examples to illustrate the principles and implementation methods of the utility model. The above examples are only used to help understand the method and core ideas of the utility model. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the utility model, the utility model can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the claims of the utility model.

Claims

1. A nozzle, characterized in that: The present invention comprises a forming cylinder for forming a brick blank, wherein the cross-sectional area of ​​the forming cylinder increases in a direction from the feeding port to the discharging port of the forming cylinder; the cross-sectional area of ​​the forming cylinder is trapezoidal, and the forming cylinder comprises a first side surface (1), a second side surface (2), a third side surface (3) and a fourth side surface (4) which are connected in sequence, wherein the first side surface (1) is parallel to the third side surface (3), and the second side surface (2) is arranged to intersect with the fourth side surface (4); A first structural groove (5) is formed at the intersection of the first side surface (1) and the second side surface (2), and a second structural groove (6) is formed at the intersection of the first side surface (1) and the fourth side surface (4); the first structural groove (5) and the second structural groove (6) are symmetrically arranged; the first structural groove (5) and the second structural groove (6) are both arc grooves; the first structural groove (5) and the second structural groove (6) are used to prevent the machine head from causing wear to the brick blank; The first side surface (1) is formed with a first protrusion (7) for controlling the height of the mud strip.

2. The nozzle according to claim 1, characterized in that: The length of the first protrusion (7) is half the length of the first side surface (1).

3. The nozzle according to claim 1, characterized in that: The first protrusion (7) is located at the center of the first side surface (1).

4. The nozzle according to claim 1, characterized in that: The groove bottom of the first protrusion (7) is formed with a second protrusion (8) for reducing the size of the brick.

5. The nozzle according to claim 4, characterized in that: The second bulge (8) is located at the center of the first bulge (7).

6. The nozzle according to claim 4, characterized in that: The length of the second protrusion (8) is one quarter of the length of the first side surface (1).

7. The nozzle according to any one of claims 1 to 6, characterized in that: The difference between the first side surface (1) and the third side surface (3) is within a set range.

8. A mud squeezing device for mullite bricks, characterized in that: The machine nozzle comprises any one of claims 1 to 7.

Images