Streamlined bottom cover

Abstract

The utility model discloses a streamline bottom cover, including bottom cover, bottom cover outer surface is streamline curved surface, bottom cover looks from vertical section, and the section is about center line symmetry, bottom cover lower part section is approximate to isosceles triangle, and bottom cover upper part section is approximate to isosceles trapezoid, and the upper end inner arc surface of bottom cover is equipped with circular table, and the inside of circular table is provided with tailgate, and the upper surface of tailgate is equipped with 16 even distribution's screw belt clamping groove, and the inside of screw belt clamping groove all has the screw belt of clamping, the inside lower extreme of bottom cover is equipped with support structure trunk locating slot, and the inside of support structure trunk locating slot is inserted and is connected with support structure trunk, and the lower surface middle part of tailgate is equipped with support structure trunk clamping groove, this streamline bottom cover, optimization folding filter drum bottom airflow, avoid dust particle direct wash filter material, prolong the service life of filter drum, and because of its streamline design simultaneously, the resistance of vertical rising airflow will greatly reduce.

Claims

1. A streamlined bottom cover, characterized in that, include: Bottom cover (1), the bottom cover (1) is used to connect the filter material to avoid large particles and high-speed airflow directly washing the filter material; The outer surface of the bottom cover (1) is a streamlined curved surface. From the vertical section, the section of the bottom cover (1) is symmetrical about the center line. The lower part of the bottom cover (1) is approximately an isosceles triangle, and the upper part of the bottom cover (1) is approximately an isosceles trapezoid. A frustum (9) is opened on the inner arc surface of the upper end of the bottom cover (1). A tail plate (2) is set inside the frustum (9). The upper surface of the tail plate (2) is provided with 16 evenly distributed threaded strip slots (10). Threaded strips (11) are snapped into the inside of each threaded strip slot (10).

2. The streamlined bottom cover according to claim 1, characterized in that: The bottom cover (1) has a support structure main trunk positioning groove (5) at the lower end of the interior. The support structure main trunk (3) is inserted into the support structure main trunk positioning groove (5). The lower surface of the tail plate (2) has a support structure main trunk slot (6) in the middle. The upper end of the support structure main trunk (3) is engaged in the support structure main trunk slot (6).

3. A streamlined bottom cover according to claim 1, characterized in that: The inner arc surface of the bottom cover (1) is provided with uniformly distributed support structure support positioning grooves (7), and support structure supports (4) are inserted into the interior of each support structure support positioning groove (7). The lower surface edge of the tail plate (2) is provided with uniformly distributed support structure support slots (8), and the upper ends of the support structure supports (4) are respectively inserted into the interior of the vertically adjacent support structure support slots (8).

4. A streamlined bottom cover according to claim 1, characterized in that: The lower end of the outer arc surface of the bottom cover (1) protrudes outward, the highest point of the protrusion is T / max1, the height of the lower end of the outer arc surface of the bottom cover (1) is H / 1, the upper end of the outer arc surface of the bottom cover (1) protrudes outward, the highest point of the protrusion is T / max2, the height of the upper end of the outer arc surface of the bottom cover (1) is H / 2, the widest part of the outer arc surface of the bottom cover (1) is W / 1, the diameter of the uppermost part of the outer arc surface of the bottom cover (1) is W / 2, T / max1 and T / max2 satisfy T / max1:T / max2=11:1, H / 1 and H / 2 satisfy H / 1:H / 2=7:2, W / 1 and W / 2 satisfy W / 1:W / 2=11:10, H / 1 and W / 1 satisfy H / 1:W / 1=11:

10.

5. A streamlined bottom cover according to claim 1, characterized in that: The bottom cover (1) has a pointed end.

6. A streamlined bottom cover according to claim 1, characterized in that: The angle between the diameter of the point where the center line of the spiral ribbon (11) intersects the edge of the tail plate (2) and the center line of the spiral ribbon (11) on the horizontal plane is β, where β is 30°. The pitch of the spiral ribbon (11) is P, where P has 0.1 turns. The height of the spiral ribbon (11) is H / 3, where P and H / 3 satisfy P:H / 3=10:

1. The angle between the spiral ribbon (11) and the central axis of the bottom cover (1) is α, where α is less than 15° and greater than 5°. The length of the projection of the spiral ribbon (11) onto the horizontal plane is r, where 5° < arccot(H / 3÷r) < 15°.

7. A streamlined bottom cover according to claim 1, characterized in that: The width of the spiral ribbon (11) is w, and W / 1 and w satisfy W / 1:w=22:

1. The thickness of the spiral ribbon (11) is t, and w and t satisfy w:t=3:2.

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