Novel check valve

Abstract

The utility model relates to the technical field of flue smoke prevention devices, in particular to a novel check valve which can adapt to flues with various different diameters, is convenient to install and improves practicability, and comprises an installation base, an installation cylinder is arranged at the front end of the base, and a detachable reducing ring is installed at the front end of the installation cylinder. Two fan blades are obliquely mounted in the mounting cylinder, connecting shafts are arranged on the sides, close to each other, of the two fan blades, each fan blade is rotationally connected with the mounting cylinder through the corresponding connecting shaft, the same sealing gasket is arranged at the front ends of the two fan blades, and a sealing ring matched with the sealing gasket is arranged on the inner wall of the mounting cylinder. An internal connecting rod is fixedly arranged at the rear part of the mounting base, the middle part of the internal connecting rod is in threaded connection with a screw rod, the rear part of the screw rod is in threaded connection with an external supporting rod, first magnetic blocks are arranged on two sides of the sealing ring, a second magnetic block which attracts the first magnetic block is arranged on each fan blade, and a balancing weight is arranged on the sealing gasket.

Description

Technical Field

[0001] The utility model relates to the technical field of flue smoke prevention devices, in particular to a novel check valve. Background Technique

[0002] As is well known, the exhaust devices of multiple households in current high-rise buildings share a common flue. If the main and auxiliary flues (parent and child flues) are not adopted, the exhaust devices of each household are directly discharged into the common flue. During the period when the cooking operations of the households are relatively concentrated, a large amount of hot air carrying oil fume is discharged into the flue, resulting in the oil fume in the common flue easily entering the room through the air duct when the upper households do not use the range hood and integrated stove, causing the indoor air to become turbid and having an odor, which affects physical health. Therefore, a flue check valve is generally installed on ordinary range hoods.

[0003] The structure of the existing check valve is simple and can only be connected to a flue with a matching size, resulting in low practicability of the existing check valve. Moreover, the existing check valve is usually connected by bolts, and the installation process of the check valve is too laborious for positions where it is inconvenient to install bolts. Content of the Utility Model

[0004] (1) Technical Problems to be Solved

[0005] In view of the deficiencies of the prior art, the utility model provides a novel check valve, which can adapt to flues with a variety of different diameters and is convenient for installing the check valve, improving the practicability.

[0006] (2) Technical Solutions

[0007] To achieve the above object, the utility model provides the following technical solution: a novel check valve, including an installation base, the front end of the base is provided with an installation cylinder, the outer diameter of the installation cylinder gradually decreases from the rear to the front, the front end of the installation cylinder is installed with a detachable reducing ring, two fan blades are obliquely installed inside the installation cylinder, both sides of the two fan blades close to each other are provided with connecting shafts, each fan blade and the installation cylinder are rotationally connected through the connecting shaft, the front ends of the two fan blades are provided with the same sealing gasket, and a sealing ring matching the sealing gasket is arranged on the inner wall of the installation cylinder. The rear part of the installation base is fixedly provided with an internal connecting rod, the middle part of the internal connecting rod is threadedly connected with a screw rod, and the rear part of the screw rod is threadedly connected with an external support rod.

[0008] Further, first magnetic blocks are arranged on both sides of the sealing ring.

[0009] Further, second magnetic blocks attracting the first magnetic blocks are arranged on each fan blade.

[0010] Further, a weight block is arranged on the sealing gasket.

[0011] Further, one end of the screw rod is provided with a wrench.

[0012] Further, a fluted socket is arranged in the middle of the wrench.

[0013] (III) Beneficial effects

[0014] Compared with the prior art, the utility model provides a novel check valve, which has the following beneficial effects:

[0015] 1. For the novel check valve, through the arrangement of the installation cylinder, and the outer diameter of the installation cylinder gradually decreases from back to front, the installation cylinder can install flue ducts of different sizes. Through the arrangement of the reducing ring, by selecting reducing rings with different inner diameters and installing the reducing rings on the installation cylinder, flue ducts of various diameters can also be installed, thus effectively improving the practicability of the check valve;

[0016] 2. For the novel check valve, through the arrangement of the internal connecting rod, the screw rod and the external support rod, the external support rod is connected through the screw rod and the internal connecting rod, and the external support rod is rotated to fix the check valve, which is more convenient than the traditional bolt installation and can be applied to installation positions where bolts are not applicable, effectively improving the practicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a three-dimensional structural schematic diagram of the utility model;

[0018] Figure 2 is a top-view structural schematic diagram of the utility model;

[0019] Figure 3 is a side-sectional structural schematic diagram of the utility model;

[0020] Figure 4 is a three-dimensional structural schematic diagram of the installation base of the utility model;

[0021] Figure 5 is a top-view structural schematic diagram of the installation base of the utility model;

[0022] Figure 6 is a three-dimensional structural schematic diagram of the fan blade and the sealing gasket of the utility model;

[0023] Figure 7 is a three-dimensional structural schematic diagram of the fan blade of the utility model;

[0024] Figure 8 is a three-dimensional structural schematic diagram of the sealing gasket of the utility model.

[0025] In the figure: 1, mounting base; 2, mounting cylinder; 3, reducing ring; 4, fan blade; 5, connecting shaft; 6, sealing gasket; 7, configuration block; 8, first magnet; 9, sealing ring; 10, second magnet; 11, internal connecting rod; 12, screw; 13, external support rod; 14, wrench. Detailed implementation manner

[0026] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0027] Please refer to Figure 1-8 , a novel check valve of the present invention includes a mounting base 1. A mounting cylinder 2 is provided at the front end of the base. The outer diameter of the mounting cylinder 2 gradually decreases from the rear to the front. The mounting cylinder 2 can be installed with flues of different sizes. A detachable reducing ring 3 is installed at the front end of the mounting cylinder 2. By selecting reducing rings 3 with different inner diameters and installing the reducing rings 3 on the mounting cylinder 2, flues of various different diameters can also be installed. Two fan blades 4 are inclinedly installed inside the mounting cylinder 2. Connecting shafts 5 are provided on one side of the two fan blades 4 close to each other. Each fan blade 4 and the mounting cylinder 2 are rotationally connected through the connecting shaft 5. A same sealing gasket 6 is provided at the front ends of the two fan blades 4. A sealing ring 9 matching the sealing gasket 6 is provided on the inner wall of the mounting cylinder 2. An internal connecting rod 11 is fixedly provided at the rear of the mounting base 1. A screw 12 is threadedly connected to the middle of the internal connecting rod 11. The rear of the screw 12 is threadedly connected to an external support rod 13. The external support rod 13 is connected to the internal connecting rod 11 through the screw 12. The external support rod 13 is rotated to fix the check valve.

[0028] Wherein, first magnets 8 are provided on both sides of the sealing ring 9.

[0029] Wherein, second magnets 10 attracted to the first magnets 8 are provided on each fan blade 4 to improve the sealing performance between the sealing ring 9 and the fan blade 4.

[0030] Wherein, a counterweight block is provided on the sealing gasket 6, and the opened fan blade 4 automatically closes under gravity.

[0031] Wherein, a wrench 14 is provided at one end of the screw 12 to facilitate the rotation of the screw 12.

[0032] Wherein, a flower groove is provided in the middle of the wrench 14, and a screwdriver can be used to screw the screw 12.

[0033] In summary, for this new type of check valve, during use, install the mounting base 1 at the designated position, then connect the external support rod 13 through the screw 12 and the internal connecting rod 11, and rotate the external support rod 13 to fix the check valve with the external support rod 13. Select a suitable reducing ring 3 according to the diameter of the flue or do not use the reducing ring 3, and connect the flue to the reducing ring 3 or directly to the mounting cylinder 2.

[0034] The technical terms or scientific terms used in the description of this application should have the ordinary meaning understood by those of ordinary skill in the art to which this application belongs. The words indicating directions such as "upper", "lower", "left", "right", "center", "vertical", "horizontal", "inner", "outer", etc. used in the description of this application are only used to indicate relative directions or positional relationships, rather than implying that the device or component must have a specific orientation, be constructed and operated in a specific orientation. When the absolute position of the described object changes, its relative positional relationship may also change accordingly. Therefore, it should not be construed as a limitation to this application. The terms "first", "second", "third" and similar terms used in the description of this application are only for descriptive purposes to distinguish different components, and cannot be construed as indicating or implying relative importance.

[0035] The similar words such as "a", "one" or "the" used in the description of this application should not be construed as an absolute limitation on the quantity, but should be understood as having at least one. The similar words such as "including" or "comprising" used in the description of this application are intended to mean that the elements or objects appearing before this word cover the elements or objects listed after this word and their equivalents, without excluding other elements or objects.

[0036] Although the embodiments of the present utility model have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A new type of check valve, comprising an installation base (1), characterized in that: A mounting cylinder (2) is provided at the front end of the base. The outer diameter of the mounting cylinder (2) gradually decreases from the rear to the front. A detachable diameter-changing ring (3) is installed at the front end of the mounting cylinder (2). Two fan blades (4) are inclinedly installed inside the mounting cylinder (2). Connecting shafts (5) are provided on one side of each of the two fan blades (4) that are close to each other. Each fan blade (4) is rotatably connected to the mounting cylinder (2) through the connecting shaft (5). A same sealing gasket (6) is provided at the front ends of the two fan blades (4). A sealing ring (9) matching the sealing gasket (6) is provided on the inner wall of the mounting cylinder (2). An internal connecting rod (11) is fixedly provided at the rear part of the mounting base (1). A screw rod (12) is threadedly connected to the middle of the internal connecting rod (11). An external support rod (13) is threadedly connected to the rear part of the screw rod (12).

2. A novel check valve according to claim 1, characterized in that: First magnetic blocks (8) are provided on both sides of the sealing ring (9).

3. A novel check valve according to claim 2, characterized in that: Second magnetic blocks (10) that attract the first magnetic blocks (8) are provided on each of the fan blades (4).

4. A novel check valve according to claim 1, characterized in that: A weight block is provided on the sealing gasket (6).

5. A novel check valve according to claim 1, characterized in that: A wrench (14) is provided at one end of the screw rod (12).

6. The novel check valve according to claim 5, wherein: A flower groove is provided in the middle of the wrench (14).

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