Flue gas labyrinth cover
Technical Field
The invention relates to the technical field of fire-fighting equipment, in particular to a smoke labyrinth cover.
Background
The labyrinth cover is used for covering the labyrinth in the smoke detector, smoke enters the labyrinth through the labyrinth cover, the structure of the labyrinth cover determines the smoothness of the smoke entering the labyrinth, the internal structure of the conventional labyrinth cover at the present stage is unreasonable in design, and the smoke entering and drifting out are blocked, so that false alarm of the smoke detector is caused, the inspiration degree of the response of the detector is reduced, and the dust resistance of the conventional labyrinth cover is weak.
Disclosure of Invention
The present invention aims to solve, at least to some extent, one of the above technical problems in the prior art. In view of this, the present invention needs to provide a smoke labyrinth cover with reasonable structure, high detection sensitivity, high dust resistance and convenient smoke entry or exit.
The invention provides a smoke labyrinth cover which is used in cooperation with a labyrinth, and comprises a cylindrical shell, wherein a plurality of rows of through holes are formed in the side wall of the shell along the circumferential direction, transverse airflow guide rings are arranged between two adjacent rows of through holes on the outer wall of the shell, a plurality of longitudinal airflow guide posts uniformly arranged along the circumferential direction are arranged on the inner wall of the shell, a plurality of shielding gratings uniformly arranged along the circumferential direction and mutually spaced apart are arranged in the shell, and an annular sedimentation area is further arranged on the bottom plate of the shell.
According to one embodiment of the invention, the shielding grating is a folded plate structure formed by connecting a first folded plate and a second folded plate at an angle, wherein the first folded plate is close to the longitudinal airflow guiding post, the second folded plate is close to the annular settlement area, a first plane and a second plane of the first folded plate are mutually 45 degrees to form a sharp angle design, a second plane and a third plane of the first folded plate are mutually 135 degrees, a fourth plane and a fifth plane of the second folded plate are mutually 45 degrees to form a sharp angle design, and a fifth plane and a sixth plane of the second folded plate are mutually 135 degrees.
According to one embodiment of the invention, the third plane of the first flap and the sixth plane of the second flap form an angle in the range of 88-92 degrees.
According to one embodiment of the present invention, the vertical height of the shielding gratings is a certain distance higher than the height of the housing, wherein the second plane and the fifth plane in each shielding grating are all parallel to each other, and the end extension line of the fifth plane of each shielding grating intersects with the center of the circumference surrounded by the shielding gratings.
According to one embodiment of the invention, the cross section of the transverse airflow guide ring is an isosceles trapezoid, and the bottom edge of the shorter side of the isosceles trapezoid is radially arranged outwards from the shell.
According to one embodiment of the invention, the cross section of the longitudinal air flow guiding post is an isosceles triangle, and one tip of the isosceles triangle is arranged towards the center of the housing.
According to one embodiment of the invention, the transverse airflow guide ring and the longitudinal airflow guide column uniformly divide the through holes into frame-shaped air inlet holes or air outlet holes with consistent shapes.
According to one embodiment of the invention, the maximum aperture distance of the inlet or outlet holes is less than 1mm.
According to one embodiment of the invention, the annular settlement area is formed by uniformly arranging a plurality of dustproof grooves into a circular ring shape and is arranged in the inner area of the shielding grating surrounding city.
According to one embodiment of the invention, the dust-proof groove is a V-shaped groove.
According to the flue gas labyrinth cover, the lateral airflow guide ring is arranged on the outer side of the through hole on the shell, and the plurality of longitudinal airflow guide posts which are uniformly arranged along the circumferential direction are arranged on the inner wall of the shell, wherein the lateral airflow guide ring and the longitudinal airflow guide posts uniformly divide the through hole into frame-shaped air inlet holes or air outlet holes with consistent shapes, the cross section of the lateral airflow guide ring is isosceles trapezoid, namely the extension lines of the two oppositely arranged guide surfaces intersect on one line, and the obstruction of the outer surface of the labyrinth cover to the airflow is minimized in the air inlet or air outlet process of the flue gas; further, the cross section of the longitudinal airflow guide post is isosceles triangle, so that the airflow can fly in or fly out more easily, and the smoke in the detector with reasonable structural design can enter more easily, so that the detector can detect the surrounding smoke change more easily, the response of the detector is more sensitive, and the detector can reduce the false alarm caused by smoking of people in the detection space of the detector due to the easy flying of the smoke.
According to the smoke labyrinth cover, the circumferentially arranged shielding gratings are arranged in the labyrinth cover, and through reasonable design of angles of the shielding grating structures, external ambient light is effectively prevented from entering the labyrinth to cause interference to a detector, on the other hand, the head end face and the tail end face of the shielding grating are both in sharp angle design, so that the obstruction to air flow is reduced, the detector is more sensitive, on the other hand, the bottom surface of the labyrinth cover is also provided with the dustproof groove with the V-shaped groove structure, naturally settled dust falls into the root of the groove under the action of self gravity, and a dust area at the position belongs to a blind area of the detector, so that the dust pollution resistance of the detector is improved.
Drawings
FIG. 1 is a schematic illustration of a smoke labyrinth cover according to one embodiment of the invention.
FIG. 2 is a top view of a flue gas labyrinth cover according to one embodiment of the present invention.
Fig. 3 is a schematic view of the structure of a shielding grating of a smoke labyrinth cover according to an embodiment of the invention.
Reference numerals: 100-a flue gas labyrinth cover; 1-a housing; 2-through holes; 3-a lateral air flow guide ring; 4-longitudinal airflow guiding column; 5-shielding grating; 6-an annular sedimentation zone; 51-a first flap; 52-a second flap; 61-dustproof groove; 511-a first plane; 512-a second plane; 513-a third plane; 514-a fourth plane; 515-a fifth plane; 516-sixth plane.
Detailed Description
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present invention and should not be construed as limiting the invention.
As shown in fig. 1 and fig. 2, according to an embodiment of the present invention, a flue gas labyrinth cover 100 is used in cooperation with a labyrinth, and includes a cylindrical housing 1, a plurality of rows of through holes 2 are provided on a sidewall of the housing 1 along a circumferential direction, a plurality of transverse airflow guiding rings 3 are provided between two adjacent rows of through holes 2 on an outer wall of the housing 1, a plurality of longitudinal airflow guiding columns 4 are provided on an inner wall of the housing 1, the cross section of the transverse airflow guiding rings 3 is isosceles trapezoid, a bottom edge of a shorter side of the isosceles trapezoid is provided radially outwards along the housing 1, the cross section of the longitudinal airflow guiding columns 4 is isosceles triangle, a tip of the isosceles triangle is provided towards a center of the housing 1, a plurality of shielding gratings 5 are provided in the housing 1, the shielding gratings are uniformly provided along the circumferential direction and are arranged at intervals, and an annular sedimentation area 6 is further provided on a bottom plate of the housing 1.
The invention relates to a flue gas labyrinth cover 100, wherein a transverse airflow guide ring 3 is arranged on the outer side of a through hole 2 on a shell 1, and a plurality of longitudinal airflow guide posts 4 which are uniformly arranged along the circumferential direction are arranged on the inner wall of the shell 1, wherein the transverse airflow guide ring 3 and the longitudinal airflow guide posts 4 uniformly divide the through hole 2 into frame-shaped air inlet holes or air outlet holes with consistent shapes, the cross section of the transverse airflow guide ring 3 is isosceles trapezoid, namely the extension lines of two oppositely arranged guide surfaces are intersected on a line, and the obstruction of the outer surface of the labyrinth cover 100 to the airflow is minimized in the air inlet or air outlet process of flue gas; further, the cross section of the longitudinal airflow guide post 4 is isosceles triangle, so that the air flow can flow in or out more easily, and the smoke in the detector with reasonable structural design can enter more easily, so that the detector can detect the surrounding smoke change more easily, the response of the detector is more sensitive, and the smoke can flow easily, so that the detector can reduce the false alarm of the detector caused by smoking of people in the detection space of the detector.
As shown in fig. 2 and 3, the shielding grating 5 is a folded plate structure formed by connecting the first folded plate 51 and the second folded plate 52 at an angle, wherein the first folded plate 51 is close to the longitudinal air flow guiding post 4, the second folded plate 52 is close to the annular settlement area 6, the first plane 511 and the second plane 512 of the first folded plate 51 are mutually 45 degrees to form a sharp angle design so as to reduce the obstruction to the air flow, the second plane 512 and the third plane 513 of the first folded plate 51 are mutually 135 degrees, the fourth plane 514 and the fifth plane 515 of the second folded plate 52 are mutually 45 degrees to form a sharp angle design so as to reduce the obstruction to the air flow, the fifth plane 515 and the sixth plane 516 of the second folded plate 52 are mutually 135 degrees, the third plane 513 of the first folded plate 51 and the sixth plane 516 of the second folded plate 52 are preferably 90 degrees, the vertical height of the shielding grating 5 is higher than the height of the housing 1 by a certain distance, wherein the second plane 512 and the fifth plane 512 of each shielding grating 5 are mutually parallel to each other, and the fifth plane 515 of the fifth plane of the shielding grating 5 is mutually 135 degrees to intersect with the center of the fifth plane 515 of the shielding grating 5.
According to the flue gas labyrinth cover 100, the shielding gratings 5 are circumferentially arranged in the labyrinth cover 100, and the interference of external ambient light to the detector caused by the entrance of the external ambient light into the interior of the labyrinth is effectively prevented by reasonably designing the angles of the shielding gratings 5, and on the other hand, the head end surface and the tail end surface of each shielding grating 5 are designed to be sharp angles, so that the obstruction to air flow is reduced, and the sensitivity of the detector is further improved.
As shown in fig. 1, the transverse airflow guide ring 3 and the longitudinal airflow guide column 4 uniformly divide the through holes 2 into frame-shaped air inlet holes or air outlet holes with consistent shapes, so as to effectively prevent mosquitoes from entering the labyrinth during the use process of the detector to damage or misinformation the detector, and the maximum aperture distance of the air inlet holes or the air outlet holes is smaller than 1mm, so that the labyrinth cover 100 has an excellent anti-mosquito effect.
As shown in fig. 1 and 2, the annular sedimentation area 6 is a plurality of dust-proof grooves 61 uniformly arranged in a circular ring shape and arranged in an inner area of the surrounding area of the shielding grating 5, wherein the dust-proof grooves 61 are V-shaped grooves, naturally sedimentated dust can sink into the root of the grooves under the action of self gravity, and the dust area at the position belongs to a dead zone of the detector, so that the dust pollution resistance of the detector is improved.
While embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the invention.