A check valve

Abstract

The present invention discloses a one-way valve, which includes an air inlet housing, an air outlet housing and a sealing unit. The air inlet housing is connected to the air outlet housing and cooperates to form a sealing channel. Both ends of the sealing channel are respectively communicated with the air channels of the air inlet housing and the air outlet housing. A sealing structure is provided in the sealing channel. The sealing unit is rotatably connected to the inner wall surface of the sealing channel and is used to cooperate with the sealing structure to open or close the sealing channel. In this embodiment, by providing a sealing structure and a rotatably connected sealing unit in the sealing channel formed by the cooperation of the air inlet housing and the air outlet housing, the sealing channel is opened and closed by the cooperation of the sealing unit and the sealing structure, thereby realizing the function of the one-way valve. The sealing unit rotatably connected to the valve body will not be bent during the opening and closing process, and the stress received at the connection is small, and it is not easy to break, etc., solving the problem that the valve disc of the existing one-way valve is easy to break.

Description

Technical Field

[0001] The present invention belongs to the technical field of check valves, and particularly relates to a check valve. Background Art

[0002] In the current automotive industry environment, check valves are widely used in multiple systems involving or using pipeline connections, such as automotive fuel systems and braking systems. With the promulgation of the National VI regulations and the development of various new technologies in the automotive industry, higher requirements are also put forward for the performance of check valves.

[0003] The purpose of a check valve is to control the gas in the pipeline to flow in only one direction. At the same time, it is necessary to ensure that there is a small flow resistance when there is a large enough gas flow through the check valve. A check valve generally needs to have the functions of being able to open and close in a timely manner. Therefore, there is generally a valve disc structure inside the check valve to meet the opening and closing functions. For the opening and closing structure of this valve disc, there are very strict life (durability) test requirements. After a certain number of openings and closings of the check valve, the function of the check valve cannot fail, and the internal valve disc structure cannot have defects such as breakage and fracture.

[0004] There are various check valves on the market now, but through research and testing, it is found that there are more or less certain problems. Some check valves are designed with a "mushroom-shaped" valve disc structure. However, in order to meet the flow resistance requirements during forward ventilation, the valve disc is generally made relatively large, which will result in a large opening pressure when the valve disc is opened each time. Some check valves are designed with a "hinged" valve disc structure, with one end of the valve disc limited and pressed tightly. However, in this structure, the stress at the root of the valve disc pressing part is relatively concentrated when the valve disc is opened and closed each time, and it will be subjected to greater stress. After a long time of opening and closing, there is a great risk of fracture at the root of the valve disc. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a check valve to solve the problem that the valve disc of the existing check valve is prone to fracture.

[0006] To solve the above problems, the technical solution of the present invention is as follows:

[0007] A check valve of the present invention includes: an intake housing, an exhaust housing, and a sealing unit;

[0008] The intake housing is connected to the exhaust housing and cooperates to form a sealing channel, and both ends of the sealing channel are respectively communicated with the air ducts of the intake housing and the exhaust housing;

[0009] A sealing structure is provided in the sealing channel;

[0010] The sealing unit is rotatably connected to the inner wall surface of the sealing channel, and cooperates with the sealing structure to open or seal the sealing channel.

[0011] For the check valve of the present invention, the sealing structure is an extension ring provided on the intake housing, and the extension ring sleeves the air passage of the intake housing and extends to the sealing channel, and is used to cooperate with the sealing unit to close the sealing channel.

[0012] For the check valve of the present invention, the sealing unit includes a sealing piece and a first connecting unit;

[0013] The sealing piece is used to cover the sealing structure to open and close the sealing channel;

[0014] The first connecting unit is provided on the sealing piece; a second connecting unit is provided in the inner cavity of the sealing channel, and the first connecting unit is rotatably connected to the second connecting unit.

[0015] For the check valve of the present invention, the first connecting unit is a spherical positioning block connected to the sealing piece, and a positioning hole is provided on the spherical positioning block; the second connecting unit is a positioning column provided in the inner cavity of the sealing channel, and the diameter of the positioning column is smaller than the positioning hole; the positioning hole of the spherical positioning block sleeves the positioning column, and the relative rotation between the sealing piece and the positioning column is realized through the gap between the positioning hole and the positioning column.

[0016] For the check valve of the present invention, the first connecting unit is a rotating shaft connected to the sealing piece; the second connecting unit is a rotating groove provided in the inner cavity of the sealing channel; the rotating shaft is inserted into and rotatably connected to the rotating groove.

[0017] For the check valve of the present invention, a rotating accommodation groove for matching with the first connecting unit is provided in the inner cavity of the sealing channel, which is used to avoid the rotation of the first connecting unit; the second connecting unit is provided in the rotating accommodation groove.

[0018] For the check valve of the present invention, it further includes a first back support, and the first back support is provided in the outlet housing and extends to the sealing channel, which is used to limit the rotation angle of the sealing unit in the open state.

[0019] For the check valve of the present invention, it further includes a second back support, and the second back support is provided in the air passage of the intake housing and extends to the sealing channel, which is used to cooperate with the sealing structure to limit the deformation of the sealing unit.

[0020] For the check valve of the present invention, a plurality of limiting rib strips are provided in the sealing channel, which are used to limit the rotation direction of the sealing unit.

[0021] For the check valve of the present invention, pipeline connectors are provided at the air inlet end of the air inlet housing and the air outlet end of the air outlet housing, and the pipeline connectors are bamboo joint connectors, quick plug connectors or standard connectors.

[0022] Due to the adoption of the above technical solutions, the present invention has the following advantages and positive effects compared with the prior art:

[0023] In an embodiment of the present invention, a sealing structure and a rotatably connected sealing unit are arranged in a sealing channel formed by the cooperation of the air inlet housing and the air outlet housing. The sealing unit cooperates with the sealing structure to open and close the sealing channel, realizing the function of the check valve. The sealing unit rotatably connected to the valve body will not be bent during the opening and closing processes, and the stress received at the connection is small, and it is not easy to break, etc., solving the problem that the valve disc of the existing check valve is easy to break. Description of the Drawings

[0024] Figure 1 is an exploded view of the check valve of the present invention;

[0025] Figure 2 is a cross-sectional view of the check valve of the present invention;

[0026] Figure 3 is a schematic diagram of the open state of the check valve of the present invention.

[0027] Description of the reference numerals: 1: air inlet housing; 2: air outlet housing; 3: sealing unit; 301: positioning hole; 4: sealing structure; 5: positioning post; 6: first back support; 7: second back support. Detailed Description of the Invention

[0028] The following further elaborates in detail on a check valve proposed by the present invention in conjunction with the drawings and specific embodiments. The advantages and features of the present invention will be clearer according to the following description and the claims.

[0029] Refer to Figures 1 to 3 , in an embodiment, a check valve includes an air inlet housing 1, an air outlet housing 2 and a sealing unit 3. The air inlet housing 1 is connected to the air outlet housing 2 and cooperates to form a sealing channel, and both ends of the sealing channel are respectively communicated with the air passages of the air inlet housing 1 and the air outlet housing 2.

[0030] A sealing structure 4 is arranged in the sealing channel. The sealing unit 3 is rotatably connected to the inner wall surface of the sealing channel and is used to cooperate with the sealing structure 4 to open or close the sealing channel.

[0031] In this embodiment, a sealing structure 4 and a rotatably connected sealing unit 3 are arranged in a sealing channel formed by the cooperation of an intake housing 1 and an exhaust housing 2. The sealing unit 3 cooperates with the sealing structure 4 to open and close the sealing channel, realizing the function of a one-way valve. The sealing unit 3 rotatably connected to the valve body will not be bent during the opening and closing processes, and the stress on the connection is small, making it not easy to break, etc., solving the problem that the valve disc of the existing one-way valve is prone to breakage.

[0032] The specific structure of the one-way valve in this embodiment will be further described below:

[0033] The sealing channel is specifically formed by the cooperation of two chambers opened at the connection position of the intake housing 1 and the exhaust housing 2.

[0034] In this embodiment, the sealing structure 4 is an extension ring provided on the intake housing 1, and the extension ring sleeves the air passage of the intake housing 1 and extends into the sealing channel, for cooperating with the sealing unit 3 to close the sealing channel. The extension ring is provided on the chamber at the connection position of the intake housing 1, and this chamber is communicated with the air passage. The extension ring sleeves the air passage and becomes an extension of the air passage. The sealing unit 3 covers the extension ring to close the air passage.

[0035] In this embodiment, the sealing unit 3 includes a sealing piece and a first connection unit. The sealing piece is used to cover the sealing structure 4, that is, the extension ring, to realize the opening and closing of the one-way valve.

[0036] The first connection unit is provided on the sealing piece. A second connection unit is provided in the inner cavity of the sealing channel, and the first connection unit is rotatably connected to the second connection unit to realize the rotation of the sealing piece relative to the sealing channel.

[0037] Furthermore, the first connection unit can be a spherical positioning block connected to the sealing piece, and a positioning hole 301 is opened on the spherical positioning block. The second connection unit is a positioning post 5 provided in the inner cavity of the sealing channel, and the diameter of the positioning post 5 is smaller than that of the positioning hole 301. The positioning hole 301 of the spherical positioning block sleeves the positioning post 5, and the relative rotation between the sealing piece and the positioning post 5 is realized through the gap between the positioning hole 301 and the positioning post 5.

[0038] At the same time, a rotation accommodation groove, specifically a spherical groove, can also be provided at the position of the sealing channel for installing the positioning post 5. The shape of the spherical groove is adapted to the shape of the spherical positioning block, for avoiding the rotation of the spherical positioning block. The positioning post 5 is arranged in the spherical groove, and the spherical positioning block sleeves the positioning post 5 and is rotatably connected in the spherical groove.

[0039] Further, the positioning posts 5 can also be two posts respectively arranged on the air inlet housing 1 and the air outlet housing 2. The two are coaxial and are respectively inserted into the positioning holes 301 of the spherical positioning blocks.

[0040] In other embodiments, the first connection unit can also be a rotating shaft connected to the sealing piece. The second connection unit is a rotating groove arranged in the inner cavity of the sealing channel. The rotating shaft is inserted and rotatably connected to the rotating groove, and the rotation of the sealing piece relative to the sealing channel can also be realized. Of course, in other embodiments, there are many ways of rotational connection, as long as the rotation of the sealing piece relative to the sealing channel can be realized, which will not be specifically limited herein.

[0041] In this embodiment, the one-way valve may further include a first back support 6 and a second back support 7. The first back support 6 is arranged in the air outlet housing 2 and extends to the sealing channel, and is used to limit the rotation angle of the sealing piece in the open state to ensure that the sealing piece will not be blown open and swing without limit under the air flow.

[0042] The second back support 7 is arranged in the air duct of the air inlet housing 1, extends to the sealing channel, and does not protrude from the extension ring, and is used to cooperate with the sealing structure 4 to limit the deformation of the sealing unit 3 to prevent the sealing piece from deforming too much under negative pressure and reverse pressure.

[0043] In this embodiment, a plurality of limiting ribs are arranged in the sealing channel to limit the rotation direction of the sealing piece to ensure that the sealing piece will not rotate randomly. At the same time, a structure corresponding to preventing rotation can be arranged in the sealing channel to ensure the uniqueness of the installation position of the sealing piece each time.

[0044] For the one-way valve of the present invention, pipeline connectors are arranged at the air inlet end of the air inlet housing 1 and the air outlet end of the air outlet housing 2, and the pipeline connectors are bamboo joint connectors or quick-insert connectors or standard connectors.

[0045] In this embodiment, after the air inlet housing 1 and the air outlet housing 2 are assembled, the two can be tightly connected by welding to prevent external leakage from forming between the air inlet housing 1 and the air outlet housing 2. The welding process can be laser welding, or ultrasonic welding or other welding processes.

[0046] When the one-way valve of this embodiment is in use, the sealing piece will be limited between the air inlet housing 1 and the air outlet housing 2, and the sealing area of the sealing piece will fit with the extension ring to form a seal. When the air flow passes through the air duct of the air inlet housing 1, the sealing piece will be blown up and rotated and flow out from the air duct of the air outlet housing 2. When the air flow stops, the sealing piece will rotate back to its original position and fit with the sealing surface of the extension ring to form a seal again.

[0047] The embodiments of the present invention have been described in detail above in conjunction with the accompanying drawings. However, the present invention is not limited to the above embodiments. Even if various changes are made to the present invention, provided that these changes fall within the scope of the claims of the present invention and equivalent technologies, they still fall within the protection scope of the present invention.

Claims

1. A check valve, characterized in that, Comprising: An intake housing, an exhaust housing, and a sealing unit; The intake housing is connected to the exhaust housing and cooperates to form a sealing channel, and both ends of the sealing channel are respectively communicated with the air ducts of the intake housing and the exhaust housing; A sealing structure is provided in the sealing channel; The sealing unit is rotatably connected to the inner wall surface of the sealing channel and cooperates with the sealing structure to open or seal the sealing channel; The sealing unit includes a sealing piece and a first connecting unit; The sealing piece is used to cover the sealing structure to open and close the sealing channel; The first connecting unit is provided on the sealing piece; a second connecting unit is provided in the inner cavity of the sealing channel, and the first connecting unit is rotatably connected to the second connecting unit; The first connecting unit is a spherical positioning block connected to the sealing piece, and a positioning hole is provided on the spherical positioning block; the second connecting unit is a positioning post provided in the inner cavity of the sealing channel, and the diameter of the positioning post is smaller than the positioning hole; the positioning hole of the spherical positioning block is sleeved on the positioning post, and the relative rotation between the sealing piece and the positioning post is realized through the gap between the positioning hole and the positioning post.

2. The one-way valve according to claim 1, characterized in that, The sealing structure is an extension ring provided on the intake housing, and the extension ring is sleeved on the air duct of the intake housing and extends into the sealing channel for cooperating with the sealing unit to close the sealing channel.

3. The one-way valve according to claim 1, characterized in that, The first connecting unit is a rotating shaft connected to the sealing piece; the second connecting unit is a rotating groove provided in the inner cavity of the sealing channel; the rotating shaft is inserted into and rotatably connected to the rotating groove.

4. The one-way valve according to claim 1, characterized in that, A rotating accommodation groove for matching with the first connecting unit is provided in the inner cavity of the sealing channel for avoiding the rotation of the first connecting unit; the second connecting unit is provided in the rotating accommodation groove.

5. The one-way valve according to claim 1, characterized in that, It further includes a first backrest, and the first backrest is provided in the exhaust housing and extends into the sealing channel for limiting the rotation angle of the sealing unit in the open state.

6. The one-way valve according to claim 1, characterized in that, It further includes a second backrest, and the second backrest is provided in the air duct of the intake housing and extends into the sealing channel for cooperating with the sealing structure to limit the deformation of the sealing unit.

7. The one-way valve according to claim 1, characterized in that, A plurality of limiting rib strips are provided in the sealing channel for limiting the rotation direction of the sealing unit.

8. The one-way valve according to claim 1, characterized in that, Pipeline connectors are provided at the intake end of the intake housing and the exhaust end of the exhaust housing, and the pipeline connectors are bamboo joint connectors or quick-connect connectors or standard connectors.

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