Double-layer grating plate

Abstract

The utility model provides a double-layer grating plate. The double-layer grating plate comprises a lower-layer grating plate, square steel and an upper-layer grating plate, lower-layer air holes are formed in the lower-layer grating plate, and a certain lower-layer air hole and two adjacent lower-layer air holes are distributed in a regular triangle shape; the square steel is fixed on the lower-layer grating plate; the upper-layer grating plate is fixed on the square steel, the upper-layer grating plate is provided with upper-layer air holes, and a certain upper-layer air hole and two adjacent upper-layer air holes are distributed in a regular triangle shape; and the upper-layer air holes and the lower-layer air holes are correspondingly arranged up and down. The beneficial effects of the utility model are that: because the regular triangle air vents are arranged, the row spacing of the air vents is not changed, the line spacing is reduced, and the number of the air vents is increased. The center line of the square steel coincides with the center line of the connecting line of the air holes, welding of the square steel and the upper-layer grating plate is facilitated, and the square steel is saved. Butt joint is achieved through the middle square steel, the bending strength of the double-layer grating plate is improved, and deformation in the using process is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of steel plate rolling annealing, in particular to a double-layer grid plate. Background Art

[0002] After rolling, steel is annealed to improve performance. Annealing heating is performed with hot air. The steel coil to be heated is placed on a double-layer grid plate, and the hot air passes through the grid plate into the heating furnace to heat the steel plate. The air holes of the current double-layer grid plate are arranged in a square shape, and the square steel in the middle is arranged along the radial direction of the double-layer grid plate. The square steel in the middle is arranged along the air hole direction only in the vertical and horizontal cross center lines and the 450 diagonal direction, and most of the rest do not pass through the air holes. In order to ensure welding with the upper grid plate, a large number of square steels are used, which affects the air permeability of the double-layer grid plate. Utility Model Content

[0003] The main purpose of the utility model is to provide a double-layer grid plate with improved air permeability.

[0004] In order to achieve the above-mentioned purpose, the utility model provides a double-layer grid plate, which includes a lower grid plate, square steel and an upper grid plate;

[0005] The lower grid plate has lower air holes, and a lower air hole and two adjacent lower air holes form an equilateral triangle distribution;

[0006] The square steel is fixed to the lower grid plate;

[0007] The upper grid plate is fixed on the square steel, and the upper grid plate has upper air holes, and a certain upper air hole and two adjacent upper air holes form a regular triangle distribution; and the upper air holes and the lower air holes are arranged correspondingly up and down.

[0008] Preferably, the square steel is fixed to the lower grid plate and the upper grid plate by welding.

[0009] Preferably, the lower grid plate and the upper grid plate both have a center hole, and the lower grid plate and the upper grid plate have a virtual horizontal line and a virtual vertical line, which divide the first quadrant area, the second quadrant area, the third quadrant area and the fourth quadrant area, and the extension direction of the square steel in the first quadrant area is 60° to the virtual horizontal line and 30° to the virtual vertical line; the extension direction of the square steel in the second quadrant area is axially symmetrical with the extension direction of the square steel in the first quadrant area relative to the virtual vertical line; the extension direction of the square steel in the third quadrant area is symmetrical with the extension direction of the square steel in the second quadrant area relative to the virtual horizontal line; the extension direction of the square steel in the fourth quadrant area is symmetrical with the extension direction of the square steel in the first quadrant area relative to the virtual horizontal line.

[0010] Preferably, reinforced square steels are provided on both sides of the virtual longitudinal line to improve the strength.

[0011] Preferably, the central hole of the lower grid plate and the central hole of the upper grid plate are aligned in the up-down direction.

[0012] Preferably, there are five parallel arranged square steels in the first quadrant area, and the five square steels all extend inward from the circular edge line, one end of three of the square steels extend to the virtual horizontal line, one end of one of the square steels extends to the center hole, and one end of one of the square steels extends to the virtual vertical line.

[0013] The beneficial effects of the utility model are:

[0014] 1. Due to the use of an equilateral triangle arrangement of air holes, the column spacing of the air holes remains unchanged, the row spacing is reduced, and the number of air holes is increased.

[0015] 2. The center line of the square steel coincides with the center line of the air hole connection line, which facilitates the welding of the square steel and the upper grid plate, reduces the amount of square steel used, and saves square steel.

[0016] 3. The middle square steel is butt-jointed to increase the bending strength of the double-layer grating plate and reduce deformation during use.

[0017] Such an arrangement of air holes and the arrangement of square steel along the air holes facilitate welding, reduce the impact of the use of square steel on air permeability, and can increase the air permeability by 20%, achieving the technical effect of improving air permeability. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0019] Figure 1 A front view of a double-layer grille plate provided in an embodiment of the utility model;

[0020] Figure 2 The air vent arrangement diagram of the lower grille plate of the double-layer grille plate provided in the embodiment of the utility model, the upper grille plate has the same structure as the lower grille plate.

[0021] Figure 3 yes Figure 2 Layout diagram of the ventilation holes arranged in an equilateral triangle.

[0022] Figure 4 A top view of the arrangement of square steels on the lower grid plate provided in an embodiment of the utility model.

[0023] Figure 5 It is a schematic diagram of the arrangement in the preferred manner provided by the embodiment of the utility model.

[0024] Figure 6 This is the preliminary square air vent layout diagram of the existing double-layer grille plate.

[0025] The components represented by the numbers in the figure are: 1. Upper grid plate; 2. Square steel; 3. Lower grid plate; 4. Lower air vents; 5. Virtual horizontal line; 6. Virtual vertical line; 7. First quadrant area; 8. Second quadrant area; 9. Third quadrant area; 10. Fourth quadrant area; 11. Center hole. DETAILED DESCRIPTION

[0026] The following is a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings in the embodiments of the present invention. In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention can also be implemented in other ways different from those described herein, and those skilled in the art can make similar generalizations without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0027] like Figures 1 to 5 As shown, the utility model provides a double-layer grid plate, which includes a lower grid plate 1, square steel 2 and an upper grid plate 3;

[0028] The lower grid plate 1 has lower air holes 4, and a lower air hole and two adjacent lower air holes form an equilateral triangle distribution; specifically, Figure 3 It can be seen that the three adjacent lower-layer air holes form an equilateral triangle distribution, and except for the lower-layer air holes at the edge, the air holes in any three adjacent groups of these air holes at the middle position are arranged in an equilateral triangle. This arrangement makes better use of space, increases the number of holes, and correspondingly improves the air permeability. Figure 6 In an existing grille plate, the air holes are arranged in a square structure with four air holes, which occupies a larger space, has a small number of air holes, and has lower air permeability than the utility model.

[0029] The square steel 2 is fixed on the lower grid plate 1;

[0030] The upper grid plate 3 is fixed on the square steel 2, and the upper grid plate 3 has upper air holes, and a certain upper air hole forms a regular triangle distribution with two adjacent upper air holes; and the upper air holes are arranged in correspondence with the lower air holes 4. The upper grid plate 3 has the same structure as the lower grid plate 1, that is, the distribution rules of the air holes in the upper grid plate 3 and the lower grid plate 1 are the same. When the upper grid plate 3 and the lower grid plate 1 are aligned and placed up and down, the arrangement of the lower air holes and the upper air holes that are opposite to each other up and down is more conducive to the transportation of hot air.

[0031] Preferably, the square steel 2 is fixed to the lower grid plate 1 and the upper grid plate 3 by welding.

[0032] Preferably, the lower grid plate 1 and the upper grid plate 3 both have a central hole 11, and the lower grid plate 1 and the upper grid plate 3 have a virtual horizontal line 5 and a virtual vertical line 6, which are divided into a first quadrant area 7, a second quadrant area 8, a third quadrant area 9 and a fourth quadrant area 10, and the extension direction of the square steel 2 in the first quadrant area 7 is 60° with the virtual horizontal line 5 and 30° with the virtual vertical line; the extension direction of the square steel 2 in the second quadrant area 8 is axially symmetrical with the extension direction of the square steel 2 in the first quadrant area 7 relative to the virtual vertical line 6; the extension direction of the square steel 2 in the third quadrant area 9 is symmetrical with the extension direction of the square steel 2 in the second quadrant area 8 relative to the virtual horizontal line 5; the extension direction of the square steel 2 in the fourth quadrant area 10 is symmetrical with the extension direction of the square steel 2 in the first quadrant area 7 relative to the virtual horizontal line 5. Such an arrangement makes the arrangement quantity of the square steel 2 reasonable, and the structural symmetry is strong, which can significantly increase the strength of the overall structure. In addition, compared to Figure 6 The distribution of square steels in the present application reduces the overall number of square steels, which makes it easier to weld square steels and improves processing efficiency. The continuity of the square steel arrangement is enhanced, the breakage of the sites is avoided, and the symmetry of the arrangement is strengthened.

[0033] Preferably, reinforced square steels 2 are provided on both sides of the virtual longitudinal line 6 to improve the strength.

[0034] Preferably, the central hole 11 of the lower grid plate 1 and the central hole 11 of the upper grid plate 3 are aligned in the up-down direction.

[0035] Preferably, there are five parallel arranged square steels 2 in the first quadrant area 7, and the five square steels 2 all extend inward from the circular edge line 13, one end of three of the square steels extend to the virtual horizontal line 5, one end of one of the square steels extends to the center hole 11, and one end of one of the square steels extends to the virtual vertical line 6.

[0036] The beneficial effects of the utility model are:

[0037] 1. Due to the use of an equilateral triangle arrangement of air holes, the column spacing of the air holes remains unchanged, the row spacing is reduced, and the number of air holes is increased.

[0038] 2. The center line of the square steel coincides with the center line of the air hole connection line, which facilitates the welding of the square steel and the upper grid plate, reduces the amount of square steel used, and saves square steel.

[0039] 3. The middle square steel is butt-jointed to increase the bending strength of the double-layer grating plate and reduce deformation during use.

[0040] Such an arrangement of air holes and the arrangement of square steel along the air holes facilitate welding, reduce the impact of the use of square steel on air permeability, and can increase the air permeability by 20%, achieving the technical effect of improving air permeability.

[0041] In a further preferred embodiment, Figure 5 In the embodiment, there are also air holes in the arrangement direction of the square steel, which further enhances the air permeability, but this does not affect the fixing and welding of the square steel. In the previous embodiment, the square steel is welded and fixed in the middle position of the air holes in two adjacent rows, and in the preferred embodiment, the square steel can be welded and fixed on the air holes in one row.

[0042] Obviously, the described embodiments are only some embodiments of the utility model, not all embodiments. Based on the embodiments of 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.

Claims

1. A double-layer grid plate, characterized in that: include: The lower grid plate has lower air holes, and a lower air hole and two adjacent lower air holes form an equilateral triangle distribution; Square steel, fixed to the lower grid plate; The upper grid plate is fixed on the square steel, and the upper grid plate has upper air holes, and a certain upper air hole and two adjacent upper air holes form a regular triangle distribution; and the upper air holes and the lower air holes are arranged correspondingly up and down.

2. The double-layer grid plate according to claim 1, characterized in that: The square steel is fixed to the lower grid plate and the upper grid plate by welding.

3. The double-layer grid plate according to claim 1, characterized in that: The lower grid plate and the upper grid plate both have a center hole, and the lower grid plate and the upper grid plate have a virtual horizontal line and a virtual vertical line, which divide the first quadrant area, the second quadrant area, the third quadrant area and the fourth quadrant area. The extension direction of the square steel in the first quadrant area is 60° to the virtual horizontal line and 30° to the virtual vertical line; the extension direction of the square steel in the second quadrant area is axially symmetrical with the extension direction of the square steel in the first quadrant area relative to the virtual vertical line; the extension direction of the square steel in the third quadrant area is symmetrical with the extension direction of the square steel in the second quadrant area relative to the virtual horizontal line; the extension direction of the square steel in the fourth quadrant area is symmetrical with the extension direction of the square steel in the first quadrant area relative to the virtual horizontal line.

4. The double-layer grid plate according to claim 3, characterized in that: Reinforced square steels are arranged on both sides of the virtual longitudinal line to improve the strength.

5. The double-layer grid plate according to claim 1, characterized in that: The central hole of the lower grid plate and the central hole of the upper grid plate are aligned in the up-down direction.

6. The double-layer grid plate according to claim 1, characterized in that: There are five parallel square steels in the first quadrant, and the five square steels all extend inward from the circular edge line, one end of three of the square steels extends to the virtual horizontal line, one end of one of the square steels extends to the center hole, and one end of one of the square steels extends to the virtual vertical line.

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