CN216382702U - Wind-proof exhaust hood - Google Patents

Abstract

The utility model relates to a windproof exhaust hood used for an outdoor exhaust outlet, which can also be used for an indoor public exhaust duct inlet. The valve mainly comprises a valve seat (15) and a conical valve (11), wherein a hinge is arranged at the upper end of the valve seat (15), a groove type valve sealing surface (18) and a groove type seat sealing surface (17) are closed in a full circle, a semicircular wind shield (10) extends out of the lower semicircle in front of the valve seat (15), the shape of the conical valve at the lower half part is changed equivalently, and the shape of a W-shaped valve passes through in the transverse air sweeping process; the longitudinal wind sweeping is in an F valve shape, other wind directions are in alternate transformation of W and F valve shapes, and therefore the phenomenon of pressure reduction can not occur any more.

Description

Wind-proof exhaust hood

Technical Field

The utility model relates to an outlet windproof non-return device for exhausting air to the outside, in particular to a windproof and anti-backflow non-return device for an exhaust pipe outlet of a range hood.

Background

The device of the outlet for exhausting air to the outside needs to have two functions, namely unobstructed and smooth exhausting; secondly, the outlet can be closed in time after the air is exhausted, and cold and hot air is prevented from entering the room. However, since the outlet is exposed outdoors, when in bad weather, the strong wind easily makes the cover decompress at the outlet valve of the exhaust pipe, causing the valve to be pressed open, commonly speaking, blown open, and the result is that the valve repeatedly beats the valve seat, not only causing the sealing failure, but also generating the noise which is hard to bear, and easily damaging the valve itself, so to speak, this is a worldwide problem (the problem is that there is no simple method to solve the problem). The present inventors have studied about this problem for thirty years, and have not completely solved this problem from patent No. 902092650 to patent No. 201010259548X. Although the 201010259548X range hood check valve adopts a conical valve structure, the shape of the conical valve structure plays a role in balancing the internal pressure and the external pressure, the conical valve with radian still generates a pressure reduction phenomenon under the action of transverse wind or other wind directions at the lower part of the valve, and the valve cannot be completely fixed.

The double-blade check valve arranged on the existing range hood is basically useless, because the double-blade check valve is easily stuck by oil near the impeller and has no reliability, the check valve is needed to be arranged at the outlet of the exhaust pipe far away from the range hood no matter the exhaust is carried out to the outdoor or the indoor exhaust passage. However, the outdoor exhaust outlet is not available, the check valve of the indoor exhaust outlet is a five-flower eight-door check valve, most of the check valves are used for displacing a double-blade valve structure on the range hood to the exhaust outlet, and the check valve is closed in a spring mode under the condition of no gravity action, so that not only is the complexity of a mechanism caused, but also the reliability is difficult to ensure.

Disclosure of Invention

The utility model aims to provide a windproof exhaust hood (valve) which can completely keep the valve still stationary in windy weather, is smooth and unobstructed during exhaust, is reliably closed and stationary during closing, can be used for an indoor public exhaust passage inlet and prevents exhaust gas of other people from flowing backwards.

A windproof smoke exhaust hood mainly comprises a valve seat (15) and a valve, wherein a groove type seat sealing surface (17) is arranged on the valve seat (15), the center line of the seat sealing surface (17) moves downwards by a corresponding distance relative to the center line of the valve seat (15), a hinge hole (8) is formed in the upper end of the valve seat (15), a hinge shaft (7) is arranged on the valve (11), the seat sealing surface and the hinge shaft are connected to form a hinge, a flange is arranged on the edge of a conical valve (11) or a spherical valve to form a 360-degree groove type valve sealing surface (18), the groove type valve sealing surface (18) and the groove edge of the groove type seat sealing surface (17) are in a matching relation, the groove type valve sealing surface and the groove edge are sealed in a full circle within a 360-degree range, a semicircular wind shielding plate (10) extends out of the lower semicircle in front of the valve seat (15), and a drainage groove (12) is arranged at the lowest end of the semicircular wind shielding plate (10).

The hinge hole (8) at the upper end of the valve seat (15) is formed by connecting a rear hinge hole seat (9) on the valve seat (15) with a front hinge hole seat (6) through screws.

A circular pipe A connecting pipe (24) is arranged on the outermost circle behind a valve seat (15), a circular D connecting pipe (21) is arranged on the innermost circle, two column type connecting pipes with different diameters are arranged between the A connecting pipe (24) and the D connecting pipe (21), the column type connecting pipe is actually formed by arranging a plurality of B columns (23) and a plurality of C columns (22) on tracks with two different diameters, and the B columns (23) and the C columns (22) are arranged in a staggered mode and stand on the tracks with two different diameters to support and position exhaust pipes with different diameters.

The utility model has the technical effect that the problem of opening of the air passing valve can be thoroughly solved by extending the semicircular wind shield at the lower semicircular part in front of the valve seat. The principle is that no matter what shape of valve (referring to the integral valve with a hinge at the upper end of a valve seat), after strong wind sweeps the valve (taking a conical valve as an example) with the center line of the valve deviated to one side of the hinge above, the conical valve at the upper half part cannot generate valve passive possibility because of the fixation of the hinge; the valve at the lower half part is far away from the limit of the hinge due to no limit of a fixed object, and although the valve has a conical valve with a pressure reducing function, the conical valve still has a certain radian, and the phenomenon that air passes through the valve to open still occurs. Therefore, the edge of the valve of the lower half part is provided with the semicircular wind shield, which is equivalent to change the shape of the conical valve of the lower half part, and the shape of the W-shaped valve passes through the process of sweeping the transverse wind; the longitudinal wind sweeping is in an F valve shape, and other wind directions are in alternate transformation of W and F valve shapes, so that the phenomenon of pressure reduction can not occur any more.

The structure that the drain groove is arranged at the lowest point of the wind shield can further avoid the possibility that rainwater enters the exhaust pipe due to installation of the wind shield (the inner ring of the concave-convex sealing groove of the valve is equivalent to a step), and the rainwater can be discharged instantly.

The hinge hole on the valve seat falls into with integrative back hinge hole seat of valve seat and preceding hinge hole seat, and preceding hinge hole seat is connected the structure benefit that forms the hinge hole on the hinge hole seat of back through the screw and is: firstly, the hinge shaft can be thickened and lengthened to improve the strength (generally, the hinge holes of the plastic part with the structure are fixed, and then the shaft is extruded by elasticity, but the shaft extruded into the hinge holes by the elasticity cannot be thickened and lengthened); secondly, the hole has great area and can increase frictional force with the axle cooperation back, utilizes this kind of frictional force, can adjust the cooperation of hinge and hinge seat wantonly: when the valve is required to be kept in an opening state under the condition of good weather, the hinge seat can be tightened a little, and the friction force is increased, so that the valve can be kept in the opening state without being directly closed by gravity after being opened; when weather becomes bad, the automatic closing device can overcome the friction force and automatically close under the action of a slight external force of wind; when the valve is not needed, for example, when the valve is used at the inlet of an indoor exhaust passage, the hinge seat can be adjusted to be loose and can move freely, the hinge can be kept to rotate freely, and the valve can be closed automatically by gravity after being opened.

The structure effect of arranging two column type connecting pipes with different diameters between the A connecting pipe and the D connecting pipe behind the valve seat is that the arrangement space of the connecting pipes with the specification is not available, the column type connecting pipes adopt a staggered arrangement method, two enclosing walls of the A connecting pipe and the D connecting pipe are ingeniously utilized, and the other two connecting pipes are arranged to form a space, so that the utility model has the structure of four standard connecting pipes. The principle of the column type 'take-over' is that the column B or the column C plays a role in supporting and positioning, and then is externally coated (sleeved) with glass cement or foam; the inside of the valve seat is provided with a support of glass cement or foam, so that the connecting and fixing effects of the exhaust pipe and the valve seat are achieved. Therefore, the structure not only meets the use of connecting four pipes with different specifications in a limited space, but also makes full use of the functions of the prior glue and foam technology to replace a pipe clamp, and has the advantages of sealing and reliable connection without increasing the cost. The column is equivalent to steel bar, glue and foam concrete, and the connection of the pipe and the seat by the reinforced concrete structure has distinctive characteristics.

The gravity center of the valve is arranged in front by adopting the cone valve or the spherical valve, so the valve is always pressed by gravity in front when being closed, the acting force of the valve is closed without a spring, and the valve is the simplest structure which is closed tightly by pressure action when being closed automatically and in a static state; the hinge of the valve is arranged above and outside the sealing surface, so that the valve can be integrally formed into a large sail, the maximum force arm can reach the size with a large diameter, the opening acting force (exhaust pressure) is far more than several times of that of a double-blade valve, and the reliability of the double-blade valve is absolutely ensured. Therefore, the windproof exhaust hood with windproof function is not only suitable for outdoor exhaust, but also suitable for a non-return device for exhausting air indoors to an exhaust passage inlet, has the advantages of reliably preventing backflow of a plurality of shared exhaust passages due to a common exhaust passage, and has reliable sealing effect due to the structure.

Drawings

The present invention is described in further detail below with reference to the attached drawing figures.

FIG. 1 is a schematic of the present invention;

FIG. 2 is a schematic view of another aspect of the present invention;

fig. 3 is a schematic diagram of four exhaust pipe connecting pipes arranged on a valve seat.

In the figure: 1. the device comprises a screw hole, a connecting plate 2, a connecting plate 3, a limiting rod 4, an inclined plane 5, a double rocker arm 6, a front hinge seat 7, a hinge shaft 8, a hinge hole 9, a rear hinge seat 10, a wind shield 11, a conical valve 12, a drainage channel 13, a boss 14, a plane plate 15, a valve seat 16, a fixing hole 17, a seat sealing surface 18, a valve sealing surface 19, a trapezoidal pad 20, a screw 21, a D connecting pipe 22, a C upright post 23, a B upright post 24 and an A connecting pipe.

Detailed Description

Referring to the attached figure 1, a valve seat (15) is provided with a rear hinge hole seat (9), and the rear hinge hole seat (9) is provided with a half hinge hole; the front hinge hole seat (6) is provided with half hinge holes, the screw holes (1) are arranged on the front hinge hole seat, and the front hinge hole seat (6) is fixed on the rear hinge hole seat (9) through screws to form the whole hinge hole (8); or a U-shaped hinge hole (8) is arranged on the rear hinge hole seat (9); the front hinge hole seat (6) is a flat cover plate and is connected through screws. The double rocker arms (5) are connected with a connecting plate (2) with the same radian as the conical valve (11), the upper ends of the double rocker arms (5) are connected with a limiting rod (3) for limiting the opening of the conical valve (11), and a valve seat (15) is provided with an inclined plane (4) for limiting the opening of the conical valve (11) to prop against the limiting rod (3) to achieve a limiting effect, so that the opening of the conical valve is proper, and particularly, when strong wind exhausts, the conical valve (11) can decompose forward wind power to ensure normal exhaust; the back of the connecting plate (2) is provided with a hole which can use a self-tapping screw, the conical valve (11) is provided with a screw hole, and the screw (20) is connected with the connecting plate (2) through a trapezoidal pad (19) (see the attached figure 2) and can also be connected or strengthened through glue; the upper end of the double rocker arm (5) is provided with a hinge shaft (7) with length and corresponding diameter, and the installation procedure is that after a rear hinge hole seat (9) provided with half hinge holes is installed, a front hinge hole seat (6) is covered to form a hinge. The tightness of the hinge with the structure can be adjusted by screws to meet different requirements of users (see beneficial effects); the semicircular wind shield (10) extends out of the lower semicircle in front of the valve seat (15), two end points of the wind shield (10) are arranged on the horizontal central line of the conical valve (11), the lower half part of the conical valve (11) can be completely shielded, a W-shaped curved surface is formed in the lateral direction, an F-shaped curved surface is formed in the longitudinal direction, the arc shape of the conical valve (15) is damaged, and the conical valve (11) cannot be decompressed after wind passes through the curved surface, so that the structure is also suitable for spherical valves; the lowest end of the semicircular wind deflector (10) is provided with a groove-shaped drainage groove (12) which is beneficial to quick drainage; the edge of a plane (14) which is extended (diameter is enlarged) on a valve seat (15) is provided with a convex boss (13), the diameter can be enlarged in the largest range, the extending area (diameter is reduced) of the plane plate (14) is favorably reduced, and the volume is reduced relatively to the whole body, namely, the boss (13) is provided with a fixing hole (16) to fix a screw to the farthest position and is far away from an exhaust pipeline hole, so that the fixation is safe and reliable; the flat plate (14) of the valve seat (15) can be adhered and fixed on the plane of the glass with the window hole through nail-free glue.

Referring to the attached figure 2, the outmost edge of the rear end of the valve seat (15) is provided with an exhaust pipe circular pipe A connecting pipe (24), the valve seat (15) is provided with a groove type seat sealing surface (17), the center line of the seat sealing surface (17) moves downwards relative to the center line of the valve seat (15) to a corresponding position, and the position for arranging the hinge seat (9) is reserved under the action of the groove type seat sealing surface, so that the hinge is arranged at a position outside the valve sealing surface. The importance lies in ensuring that the conical valve (11) is sealed in a full circle within the range of 360 degrees, which is a problem that many check valves of range hoods cannot solve, and improves the sealing property; the semicircular wind shield (10) is arranged on the outer ring of the sealing surface (17) of the groove type seat; the stainless steel conical valve (11) is formed by stamping a stainless steel plate, the edge of the stainless steel conical valve is provided with a groove type flanging to form a 360-degree valve seal (18), the valve seal surface (18) is matched with the inner edge and the outer edge of a groove type seat seal surface (17) to form an air pressure reducing device, the groove type seat seal surface (17) is provided with a plane and two side surfaces, and the three surfaces are jointed and matched with the three surfaces of the groove type seat seal surface (17) to realize a reliable seal effect.

Referring to the attached figure 3, because the exhaust pipes of the existing range hood have four standard specifications, in order to ensure that the exhaust pipes with different diameters can be connected with the valve seat (15), the best mode is to arrange four connecting pipes with different diameters on the valve seat (15), but because the diameters of the exhaust pipes with different standards are similar, the four connecting pipes are simultaneously arranged, and cannot be arranged at the same time because no space is arranged at all. Therefore, the utility model arranges a common circular pipe A connecting pipe (24) at the outermost ring, arranges a common circular D connecting pipe (21) at the innermost ring, arranges upright column type connecting pipes of two exhaust pipes with different diameters between two cylindrical enclosing walls of the A connecting pipe (24) and the D connecting pipe (21), and the 'connecting pipes' actually arranges a plurality of B upright columns (23) and a plurality of C upright columns (22) on the tracks with two different diameters, and the arrangement of the B upright columns (23) and the C upright columns (22) can be staggered mutually, namely, the structures of the thinner upright columns (23) and the C upright columns (22) which stand alternately can not be squeezed together on a radius line, thus solving the problem of insufficient space by arranging different spaces. A circle of a plurality of B columns (23) can support (be inserted into) the inner diameter of the exhaust pipe with one diameter; a ring of a plurality of C-pillars (22) can support the inner diameter of the exhaust pipe with another diameter. When the exhaust pipe with the corresponding diameter is inserted into the column type 'connecting pipe', the exhaust pipe with the corresponding diameter is surrounded between the A connecting pipe (24) and the cylindrical 'enclosing wall' of the D connecting pipe (23), and finally, the space in the cylindrical 'enclosing wall' can be filled with glass cement or foam, so that the outer diameter and the inner diameter of the exhaust pipe can be wrapped, and the effects of positioning and supporting a plurality of B columns (23) or a plurality of C columns (22) 'reinforcing steel bars' in the exhaust pipe, wrapping (sleeving) the glass cement or foam outside the exhaust pipe and supporting the glass cement or foam in the exhaust pipe are achieved, and the connecting and sealing effects of the exhaust pipe and the valve seat (15) are achieved. Therefore, the structure not only meets the use of connecting four pipes with different specifications simultaneously in a limited space, namely the valve seat (15) of the utility model can be inserted into exhaust pipes with any diameters (only four exhaust pipes with standard diameters), but also obtains more reliable connection than a pipe clamp and is superior to the connection mode of a conventional connecting pipe and a socket.

Claims (4)

1. A windproof exhaust hood mainly comprises a valve seat (15) and a valve, wherein the valve seat (15) is provided with a groove type seat sealing surface (17), the center line of the seat sealing surface (17) moves downwards relative to the center line of the valve seat (15) by a corresponding distance, the upper end of the valve seat (15) is provided with a hinge hole (8), a hinge shaft (7) is arranged on the valve (11) and is connected with the seat sealing surface (17) to form a hinge, the edge of a conical valve (11) or a spherical valve is provided with a flanging to form a 360-degree groove type valve sealing surface (18), the groove type valve sealing surface (18) and the groove edge of the groove type seat sealing surface (17) are in a matching relationship, and the two are sealed in a full circle within a 360-degree range, and the windproof exhaust hood is characterized in that a semicircular wind shield (10) extends out of a lower semicircle in front of the valve seat (15).

2. A wind shield according to claim 1, characterised in that the lowest end of the semicircular wind deflector (10) is provided with a drainage channel (12).

3. A wind-proof exhaust hood according to claim 1, characterized in that the hinge hole (8) at the upper end of the valve seat (15) is composed of a rear hinge hole seat (9) and a front hinge hole seat (6) on the valve seat (15) which are connected by screws.

4. A wind-proof exhaust hood as claimed in claim 1, characterized in that the outermost circle of the back of the valve seat (15) is provided with a circular pipe a connecting pipe (24), the innermost circle is provided with a circular D connecting pipe (21), and two column type connecting pipes with different diameters are arranged between the a connecting pipe (24) and the D connecting pipe (21), wherein the column type connecting pipes are actually provided with a plurality of B columns (23) and a plurality of C columns (22) on two tracks with different diameters, and the plurality of B columns (23) and the plurality of C columns (22) are mutually staggered and stand on the two tracks with different diameters for supporting and positioning exhaust pipes with different diameters.

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