An electrically operated non-return valve

Abstract

The utility model relates to check valve technical field, especially a kind of electric check valve, including valve body, valve seat, connecting port and drive assembly, valve seat is fixed with wall body, connecting port connects flue, and sealing component and check valve core are equipped in valve body.Check valve core includes first rotating lever, second rotating lever, first valve flap, second valve flap and torsion spring, and torsion spring is sleeved on first rotating lever and is fixedly connected with two valve flaps.Drive assembly includes electric push rod, support seat, moving frame and the limiting slot being set on moving frame, and limiting slot is cooperated with the limiting piece on rotating lever.Electric push rod drives moving frame to slide, drives rotating lever to make valve flap open and close, torsion spring self-adapting adjustment opening and closing speed difference and provide pre-tightening force to compress sealing component, avoid leakage.The utility model solves the problem that existing check valve is caused by oil dirt and leads to poor opening and closing, backflow and complex structure, realizes valve flap opening and closing accurate control, structure is simple, and good sealing, it is convenient to maintain.

Description

Technical Field

[0001] This utility model relates to the field of check valve technology, and in particular to an electric check valve. Background Technology

[0002] Range hoods are one of the essential household appliances, and check valves are a common accessory for them. Check valves are usually installed at the inlet of the common exhaust pipe in the kitchen and connected to the exhaust pipe of the range hood.

[0003] Most existing check valves rely on airflow for automatic opening and closing. However, after prolonged use of range hoods, grease easily accumulates on the valve disc inside the check valve. When the range hood is running, the air pressure is insufficient to fully open the valve disc. When the range hood is stopped, the valve disc does not close tightly, leading to backflow. Furthermore, while some electric check valves improve control through motor drive, the use of multi-stage gear transmission or complex linkage mechanisms results in an excessively compact internal structure. In grease-laden environments, transmission components are prone to jamming due to grease buildup, and disassembly requires complete disassembly of the valve body. This complex structure increases manufacturing costs and complicates maintenance, making it difficult to meet the needs of household applications. Utility Model Content

[0004] The purpose of this invention is to provide an electric check valve that solves the problems mentioned in the background section.

[0005] To achieve the above objectives, this utility model provides an electric check valve, including a valve body, a valve seat, a connection port, and a drive assembly. The valve seat and the connection port are respectively disposed at both ends of the valve body. The valve seat is fixedly connected to a wall, and the connection port is connected to a smoke exhaust pipe. The valve body is internally provided with a sealing component and a check valve core. The sealing component is disposed at the front end of the check valve core. The drive assembly is fixedly disposed above the valve body and connected to the check valve core.

[0006] Preferably, the check valve core includes a first rotating rod, a first valve disc, a second rotating rod, a second valve disc, and a torsion spring. The first rotating rod and the second rotating rod are both rotatably connected to the valve body, and the ends of the first rotating rod and the second rotating rod extending out of the valve body are connected to the drive assembly.

[0007] The first rotating rod has a cavity inside, and the first rotating rod is sleeved on the outside of the second rotating rod.

[0008] Preferably, the first valve disc is fixedly connected to the first rotating rod, and the second rotating rod is fixedly connected to the second valve disc;

[0009] The torsion spring is sleeved on the first rotating rod, with one end of the torsion spring connected to the first valve disc and the other end connected to the second valve disc.

[0010] Preferably, the drive assembly includes an electric push rod, a support base, a movable frame, a first limiting member, and a second limiting member. The support base is configured as a hollow rectangle and is fixedly connected to the valve body via a mounting plate. The movable frame is disposed inside the support base and is slidably connected to the support base. The fixed end of the electric push rod is mounted on the inner side wall of the support base, and its telescopic end is connected to the movable frame.

[0011] Preferably, the first limiting member is provided with a first limiting post, and the second limiting member is provided with a second limiting post;

[0012] The first limiting member and the second limiting member are fixedly connected to the first rotating rod and the second rotating rod, respectively.

[0013] Preferably, the movable frame is provided with a first limiting groove, a second limiting groove and a third limiting groove, the third limiting groove cooperates with the second rotating rod, the first limiting post cooperates with the first limiting groove, and the second limiting post cooperates with the second limiting groove.

[0014] Therefore, the electric check valve provided by this utility model has the following beneficial effects: the electric push rod pushes the movable frame to slide within the support base, causing the first limiting post and the second limiting post to move within the first limiting groove and the second limiting groove respectively. The first rotating rod and the second rotating rod rotate synchronously, ultimately realizing the opening and closing of the first valve disc and the second valve disc, ensuring a smooth opening and closing process, and avoiding the problem of valve discs not being able to fully open and close due to oil buildup. By using a single electric push rod to drive the nested double rotating rod, precise control of the opening and closing angles of the first valve disc and the second valve disc is achieved, avoiding the structural redundancy of traditional multi-motor drives.

[0015] A torsion spring is fitted onto the first rotating rod, with its two ends connected to the first and second valve discs respectively. When the electric push rod drives the moving frame, the first and second rotating rods rotate through the cooperation of the limiting groove and the limiting post. At this time, the elastic deformation of the torsion spring can adaptively adjust the difference in opening and closing speeds of the two valve discs, avoiding mechanical interference caused by asynchronous movement of the two valve discs due to airflow impact. When both valve discs are in the closed state, a continuous preload is provided, causing the two valve discs to tightly press against the sealing component, eliminating vibration leakage caused by airflow fluctuations. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of an electric check valve in an embodiment of this utility model;

[0017] Figure 2 This is a top view of an electric check valve according to an embodiment of the present utility model;

[0018] Figure 3 This is a front view of an electric check valve according to an embodiment of the present utility model;

[0019] Figure 4 This is a structural schematic diagram of an electric check valve from another perspective in an embodiment of this utility model;

[0020] Figure Labels

[0021] 1. Valve body; 2. Valve seat; 3. Connection port; 4. Drive assembly; 41. Electric push rod; 42. Support base; 43. Moving frame; 431. First limiting groove; 432. Second limiting groove; 433. Third limiting groove; 44. First limiting component; 441. First limiting post; 45. Second limiting component; 451. Second limiting post; 5. Sealing component; 6. Check valve core; 61. First rotating rod; 62. First valve disc; 63. Second rotating rod; 64. Second valve disc; 65. Torsion spring. Detailed Implementation

[0022] Unless otherwise defined, the technical or scientific terms used in this utility model shall have the ordinary meaning understood by one of ordinary skill in the art to which this utility model pertains. The terms "first," "second," and similar terms used in this utility model do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0023] The technical solution of this utility model will be further described below with reference to the accompanying drawings and embodiments.

[0024] Example

[0025] like Figure 1-4 As shown, this utility model discloses an electric check valve, comprising a valve body 1, a valve seat 2, a connection port 3, and a drive assembly 4. The valve seat 2 and the connection port 3 are respectively disposed at both ends of the valve body 1. The valve seat 2 is fixedly connected to the wall, and the connection port 3 is connected to the exhaust pipe to form a flue gas passage. The valve body 1 is internally provided with a sealing component 5 and a check valve core 6. The sealing component 5 is disposed at the front end of the check valve core 6 and is made of oil-resistant rubber material. It is used to press and seal when the valve disc is closed to prevent backflow of flue gas. The drive assembly 4 is fixedly disposed above the valve body 1 and connected to the check valve core 6.

[0026] The check valve core 6 includes a first rotating rod 61, a first valve disc 62, a second rotating rod 63, a second valve disc 64, and a torsion spring 65. The first rotating rod 61 has a cavity inside and is sleeved on the outside of the second rotating rod 63. The first rotating rod 61 and the second rotating rod 63 rotate coaxially and are both rotatably connected to the side wall of the valve body 1. The ends of the first rotating rod 61 and the second rotating rod 63 that extend out of the valve body 1 are connected to the drive assembly 4.

[0027] The first valve disc 62 is fixedly connected to the first rotating rod 61, and the second rotating rod 63 is fixedly connected to the second valve disc 64.

[0028] A torsion spring 65 is sleeved on the first rotating rod 61. One end of the torsion spring 65 is connected to the first valve disc 62, and the other end is connected to the second valve disc 64. During the opening and closing process, the elastic deformation of the torsion spring 65 absorbs the speed difference between the first valve disc 62 and the second valve disc 64, avoiding mechanical interference caused by airflow impact. When closed, the torsion spring 65 provides preload force, so that the first valve disc 62 and the second valve disc 64 press against the sealing component 5 to eliminate vibration leakage.

[0029] The drive assembly 4 includes an electric push rod 41, a support base 42, a movable frame 43, a first limiting member 44, and a second limiting member 45. The support base 42 is a hollow rectangle and is fixedly connected to the valve body 1 via a mounting plate, providing a sliding track. The movable frame 43 is located inside the support base 42 and is slidably connected to the support base 42. The fixed end of the electric push rod 41 is installed on the inner side wall of the support base 42, and its telescopic end is connected to the movable frame 43, outputting a linear thrust to drive the movable frame 43.

[0030] The first limiting member 44 is provided with a first limiting post 441, and the second limiting member 45 is provided with a second limiting post 451. The first limiting member 44 and the second limiting member 45 are respectively fixedly connected to the first rotating rod 61 and the second rotating rod 63.

[0031] The movable frame 43 is provided with a first limiting groove 431, a second limiting groove 432, and a third limiting groove 433. The third limiting groove 433 cooperates with the second rotating rod 63, the first limiting post 441 cooperates with the first limiting groove 431, and the second limiting post 451 cooperates with the second limiting groove 432. When the electric push rod 41 pushes the movable frame 43 to slide, the first limiting post 441 moves along the trajectory of the first limiting groove 431, driving the first rotating rod 61 to rotate. The second limiting post 451 slides in the second limiting groove 432, driving the second rotating rod 63 to rotate synchronously, ultimately realizing the opening and closing of the first valve disc 62 and the second valve disc 64.

[0032] A method of using an electric check valve according to this utility model:

[0033] Fix the valve seat 2 of the check valve to the wall at the flue inlet, and seal the connection port 3 to the exhaust pipe of the range hood. Turn on the power of the electric push rod 41, and by default, the moving frame 43 is in the left extreme position. At this time, the double valve discs are in the closed state.

[0034] When the range hood is started, the electric push rod 41 extends, the moving frame 43 moves to the right along the support base 42, the first limiting post 441 and the second limiting post 451 slide along the first limiting groove 431 and the second limiting groove 432 respectively, the first rotating rod 61 rotates counterclockwise, and the second rotating rod 63 rotates clockwise, finally opening the first valve disc 62 and the second valve disc 64, and the smoke is discharged through the valve body 1 channel.

[0035] When the range hood is turned off, the electric push rod 41 retracts, the moving frame 43 moves to the left along the support base 42, the first limiting post 441 and the second limiting post 451 slide along the first limiting groove 431 and the second limiting groove 432 respectively, the first rotating rod 61 rotates clockwise and the second rotating rod 63 rotates counterclockwise, finally achieving the closure of the first valve disc 62 and the second valve disc 64, the double valve discs press the sealing component 5 tightly, the torsion spring 65 releases the pre-tightening force to enhance the seal, and completely blocks the backflow of smoke.

[0036] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and not to limit it. Although the utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the technical solution of this utility model, and these modifications or equivalent substitutions cannot cause the modified technical solution to deviate from the spirit and scope of the technical solution of this utility model.

Claims

1. An electric check valve, characterized in that: The valve includes a valve body, a valve seat, a connection port, and a drive assembly. The valve seat and the connection port are respectively located at both ends of the valve body. The valve seat is fixedly connected to the wall, and the connection port is connected to the exhaust pipe. The valve body is internally provided with a sealing component and a check valve core. The sealing component is located at the front end of the check valve core. The drive assembly is fixedly located above the valve body and connected to the check valve core.

2. The electric check valve according to claim 1, characterized in that: The check valve core includes a first rotating rod, a first valve disc, a second rotating rod, a second valve disc, and a torsion spring. The first rotating rod and the second rotating rod are both rotatably connected to the valve body, and the ends of the first rotating rod and the second rotating rod extending out of the valve body are connected to the drive assembly. The first rotating rod has a cavity inside, and the first rotating rod is sleeved on the outside of the second rotating rod.

3. An electric check valve according to claim 2, characterized in that: The first valve disc is fixedly connected to the first rotating rod, and the second rotating rod is fixedly connected to the second valve disc; The torsion spring is sleeved on the first rotating rod, with one end of the torsion spring connected to the first valve disc and the other end connected to the second valve disc.

4. An electric check valve according to claim 3, characterized in that: The drive assembly includes an electric push rod, a support base, a movable frame, a first limiting member, and a second limiting member. The support base is a hollow rectangle and is fixedly connected to the valve body via a mounting plate. The movable frame is disposed inside the support base and is slidably connected to the support base. The fixed end of the electric push rod is mounted on the inner side wall of the support base, and its telescopic end is connected to the movable frame.

5. An electric check valve according to claim 4, characterized in that: The first limiting member is provided with a first limiting post, and the second limiting member is provided with a second limiting post; The first limiting member and the second limiting member are fixedly connected to the first rotating rod and the second rotating rod, respectively.

6. An electric check valve according to claim 5, characterized in that: The movable frame is provided with a first limiting groove, a second limiting groove and a third limiting groove. The third limiting groove cooperates with the second rotating rod, the first limiting post cooperates with the first limiting groove, and the second limiting post cooperates with the second limiting groove.

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