Range hood flue check valve

Abstract

The flue check valve of the range hood comprises a head section, a middle section and a tail section, the head section is detachably and coaxially inserted in the front side of the middle section, the rear side of the middle section is detachably inserted in the front side of the tail section, a screw rod is arranged on the tail section, and an abutting plate is connected to the screw rod in a threaded mode; two hinge shafts are symmetrically arranged on the inner side of the middle section, a meshing gear set is arranged between the two hinge shafts in a matched mode, valve plates are further fixedly arranged on the two hinge shafts respectively, the valve plates and the hinge shafts are obliquely arranged forwards, a rubber mat is arranged on the front sides of the two valve plates jointly, and oblique ring edges matched with the two valve plates are arranged on the inner side of the middle section. A magnetic attraction mechanism is arranged between the inclined ring edge and the valve plate in a matched mode. According to the utility model, the two valve plates can be synchronously opened and closed through the application of the meshing gear set, so that the same opening degree when smoke flows and the synchronous closing of the flow channel when the smoke does not flow are ensured.

Description

Technical Field

[0001] The utility model relates to the field of check valves, in particular to a range hood flue check valve. Background Art

[0002] The range hood flue check valve is a check device arranged between the range hood and the wall flue. Its operating principle is that when smoke is not flowing in the smoke duct, the valve plate closes the check valve flow channel under the action of gravity. When smoke is flowing in the smoke duct, the smoke pushes open the valve plate and passes through the check valve to be discharged into the wall flue. However, the two valve plates of the existing range hood flue check valve are independent of each other, and their opening and closing cannot achieve unified action. Different openings are likely to occur when smoke is flowing, and smoke oil is likely to accumulate near the valve plate with a small opening, which leads to restricted flow channel and poor smoke exhaust over time. When smoke is not flowing, the valve plate cannot close smoothly, which can easily cause smoke backflow. Therefore, a range hood flue check valve is needed that can ensure unified action of the valve plate. Utility Model Content

[0003] In view of the problems existing in the background technology, the purpose of the utility model is to provide a range hood flue check valve, which effectively solves the problems existing in the background technology.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] The range hood flue check valve comprises a head section, a middle section and a tail section, wherein the head section is detachably coaxially inserted on the front side of the middle section, the rear side of the middle section is detachably inserted on the front side of the tail section, the tail section is provided with a screw, and a clamping plate is screwed on the screw; two hinge shafts are symmetrically arranged on the inner side of the middle section, a meshing gear set is matched between the two hinge shafts, and valve plates are respectively fixed on the two hinge shafts, the valve plates and the hinge shafts are both tilted forward, a rubber pad is commonly arranged on the front sides of the two valve plates, an inclined ring edge matched with the two valve plates is arranged on the inner side of the middle section, and a magnetic attraction mechanism is matched between the inclined ring edge and the valve plates.

[0006] Furthermore, an articulated shaft holder is provided on the inner side of the middle section, the end of the articulated shaft is inserted into the articulated shaft holder, and a blocking piece is detachably provided on the articulated shaft holder.

[0007] Furthermore, the blocking piece is detachably mounted on one side of the hinge shaft holder by means of screws.

[0008] Furthermore, the meshing gear set includes gears coaxially fixed on two hinge shafts, and the two gears are identical and mesh with each other.

[0009] Furthermore, two rubber pad pressing rings are symmetrically arranged on the front side of the rubber pad, and the rubber pad pressing rings are arc-shaped.

[0010] Furthermore, the magnetic attraction mechanism includes permanent magnets respectively arranged on the two valve plates and suction points correspondingly arranged on the inclined ring edge. The suction points are permanent magnets or iron sheets. When the suction points are permanent magnets, they are opposite to the permanent magnets on the valve plates with opposite poles.

[0011] Furthermore, the tail section is provided with at least two pin holes, the middle section is provided with movable petals corresponding to the pin holes, and the movable petals are provided with latching protrusions matching with the pin holes.

[0012] Furthermore, a limiting ring edge cooperating with the tail section is arranged on the outer side of the middle section, and after the clamping protrusion enters the pin hole, the front side of the tail section presses against the limiting ring edge.

[0013] The utility model has the following beneficial technical effects:

[0014] In the utility model, the two valve plates can be opened and closed synchronously through the application of meshing gear sets, thereby ensuring the same opening when smoke is passing and the synchronous closure of the flow channel when smoke is not passing. The application is novel in design, simple in structure, easy to use, and suitable for popularization and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The overall structure of the embodiment of the utility model is shown in FIG. Figure 1 ;

[0016] Figure 2 The overall structure of the embodiment of the utility model is shown in FIG. Figure 2 ;

[0017] Figure 3 It is a front view of an embodiment of the utility model;

[0018] Figure 4 for Figure 3 A-A sectional view;

[0019] Figure 5 for Figure 4 A partial enlarged view of point B in the middle. DETAILED DESCRIPTION

[0020] The following is a further detailed description of the implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but cannot be used to limit the scope of the present invention.

[0021] In the description of the present utility model, unless otherwise specified, "multiple" means two or more than two; the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail" and the like indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0022] like Figure 1-5 As shown, the range hood flue check valve of this embodiment includes a range hood flue check valve, including a head section 1, a middle section 2 and a tail section 3, the head section 1 is detachably coaxially inserted at the front side of the middle section 2, the head section 1 includes an inner tube and an outer tube, the outer tube is coaxially inserted at the front side of the middle section 2, the inner tube is coaxially inserted at the front side of the outer tube, and the head section 1 is used to connect the range hood exhaust hose;

[0023] The rear side of the middle section 2 is detachably inserted into the front side of the tail section 3. Specifically, the tail section 3 has at least two pin holes 4. The middle section 2 is provided with movable petals 5 corresponding to the pin holes 4. The movable petals 5 are provided with clamping protrusions 6 that match the pin holes 4. The clamping protrusions 6 are higher in front and lower in the back, so that the front side of the tail section 3 can push the clamping protrusions 6 and the movable petals 5. The outer side of the middle section 2 is provided with a limiting ring edge 7 that matches the tail section 3. After the clamping protrusions 6 enter the pin holes 4, the front side of the tail section 3 presses against the limiting ring edge 7.

[0024] The tail section 3 is also provided with a screw rod 8, on which a tightening plate 9 is screwed, and a plurality of friction edges 10 are symmetrically arranged on the front side of the tightening plate 9 to increase the friction between the tightening plate 9 and the wall flue, and the rear side of the tail section 3 is evenly distributed with mesh edges 11 to increase the friction between the tail section 3 and the wall;

[0025] Two hinge shafts 12 are symmetrically arranged on the inner side of the middle section 2. Specifically, an hinge shaft holder 13 is arranged on the inner side of the middle section 2. The end of the hinge shaft 12 is inserted into the hinge shaft holder 13. A baffle 14 is detachably arranged on the hinge shaft holder 13 by a screw. The hinge shaft holder 13 is in a mountain shape. The hinge shaft holder 13 and the baffle 14 together enclose an axis hole that matches the end of the hinge shaft 12. A meshing gear set 15 is arranged between the two hinge shafts 12. The meshing gear set 15 includes gears coaxially fixed on the two hinge shafts 12, respectively. The two gears are identical and mesh with each other. The meshing gear set 15 is close to the lower end of the hinge shaft 12. Valve plates 16 are also fixed on the two hinge shafts 12, respectively. The valve plates 16 and the hinge shaft 12 are both inclined forward. In the natural state, the two valve plates 16 fall down to close the check valve flow channel, and the front sides of the two valve plates 16 are jointly provided with rubber pads 17, which are laid as a whole sheet to ensure the sealing of the check valve flow channel when the valve plates 16 fall down. Specifically, two rubber pad clamping rings 18 are symmetrically arranged on the front side of the rubber pad 17 by screws, and the rubber pad clamping ring 18 is arc-shaped, and an inclined ring edge 19 matching the two valve plates 16 is arranged on the inner side of the middle section 2, and a magnetic attraction mechanism is arranged between the inclined ring edge 19 and the valve plate 16, and the magnetic attraction mechanism includes permanent magnets 20 respectively arranged on the two valve plates 16 and suction points correspondingly arranged on the inclined ring edge 19, the suction points are permanent magnets or iron sheets, and when the suction points are permanent magnets, they are opposite to the permanent magnets 20 on the valve plate 16 with opposite poles.

[0026] The tail section 3 is also provided with an upward indication mark 21 and a level 22. The level 22 is a horizontal bubble level. When the level 22 indicates horizontal, the upward indication mark 21 is vertically upward and the two valve plates 16 are symmetrical.

[0027] The working principle of this embodiment is:

[0028] During installation, first attach the tail section 3 to the wall where the flue enters the wall, the clamping plate 9 is located inside the wall, and the screw 8 is screwed. The clamping plate 9 gradually approaches the inner wall of the flue entrance, and the screw 8 is continued to be screwed until the clamping plate 9 is pressed against the inner wall of the flue entrance to complete the fixation of the tail section 3, and then the middle section 2 is inserted into the tail section 3, ensuring that the clamping protrusion 6 enters the pin hole 4, and then the head section 1 is inserted into the middle section 2; when the smoke is escaping, the smoke pushes open the valve plate 16, and because of the application of the meshing gear set 15, the two valve plates 16 can be opened and closed synchronously, thereby ensuring the same opening of the two valve plates 16 when the smoke is escaping and the synchronous closure of the flow channel in the check valve when the smoke is not escaping. Compared with the prior art, the smoke exhaust of this embodiment is smoother, the closure is more thorough when the smoke is not escaping, and it is not easy to cause smoke backflow, which has strong practicality.

[0029] The embodiments of the present invention are provided for the purpose of illustration and description, and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described to better illustrate the principles and practical applications of the present invention, and to enable those of ordinary skill in the art to understand the present invention and design various embodiments with various modifications suitable for specific uses.

Claims

1. A range hood flue check valve, characterized in that: It includes a head section, a middle section and a tail section, the head section is detachably coaxially inserted on the front side of the middle section, the rear side of the middle section is detachably inserted on the front side of the tail section, the tail section is provided with a screw, and a clamping plate is screwed on the screw; two hinge shafts are symmetrically arranged on the inner side of the middle section, a meshing gear set is matched between the two hinge shafts, and valve plates are respectively fixed on the two hinge shafts, the valve plates and the hinge shafts are both tilted forward, and rubber pads are commonly arranged on the front sides of the two valve plates, the inner side of the middle section is provided with an inclined ring edge matched with the two valve plates, and a magnetic attraction mechanism is matched between the inclined ring edge and the valve plates.

2. The range hood flue check valve according to claim 1, characterized in that: An articulated shaft holder is arranged on the inner side of the middle section, the end of the articulated shaft is inserted into the articulated shaft holder, and a blocking piece is detachably arranged on the articulated shaft holder.

3. The range hood flue check valve according to claim 2, characterized in that: The blocking piece is detachably mounted on one side of the hinge shaft holder by means of screws.

4. The range hood flue check valve according to claim 1, characterized in that: The meshing gear set comprises gears which are coaxially fixed on two hinge shafts respectively, and the two gears are identical and mesh with each other.

5. The range hood flue check valve according to claim 1, characterized in that: Two rubber pad pressing rings are symmetrically arranged on the front side of the rubber pad, and the rubber pad pressing rings are arc-shaped.

6. The range hood flue check valve according to claim 1, characterized in that: The magnetic attraction mechanism includes permanent magnets respectively arranged on the two valve plates and suction points correspondingly arranged on the inclined ring edge. The suction points are permanent magnets or iron sheets. When the suction points are permanent magnets, they are opposite to the permanent magnets on the valve plates in polarity.

7. The range hood flue check valve according to claim 1, characterized in that: The tail section is provided with at least two pin holes, the middle section is provided with movable petals corresponding to the pin holes, and the movable petals are provided with clamping protrusions matched with the pin holes.

8. The range hood flue check valve according to claim 7, characterized in that: A limiting ring edge matched with the tail section is arranged on the outer side of the middle section. After the clamping protrusion enters the pin hole, the front side of the tail section presses against the limiting ring edge.

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