A vertical two-piece check air valve

Abstract

The utility model relates to the technical field of air valve, specifically disclose a vertical two piece type check air valve, including valve body, valve sheet and adjusting assembly, one end outside of valve body is equipped with valve seat, the installation direction of valve sheet is perpendicular with the axial direction of valve body each other, and valve sheet is semicircular structure, and adjusting assembly includes mounting bracket, fixed platform, electric telescopic handle and controller, and electric telescopic handle is electrically connected with controller, and the side portion between mutually symmetrical electric telescopic handle is hinged and is installed with reinforced telescopic rod, and the fixed platform is equipped with the sliding limit piece for guiding reinforced telescopic rod along the axis of valve body and sliding between reinforced telescopic rod, solved the valve sheet of traditional check air valve and reduced the ventilation section for the structure setting of the lower open type of valve sheet, and further caused the problem of the exhaust capacity attenuation, and the smoke exhaust was not smooth.

Description

Technical Field

[0001] This application relates to the field of air valve technology, and specifically discloses a vertical two-piece check valve. Background Technology

[0002] Backflow preventers are typically used in ventilation systems in public places or at the vents of exhaust ducts in range hoods. Their function is to open smoothly when the ventilation system or range hood is operating, ensuring normal ventilation, and to automatically close and seal when the system or hood is not in operation, ensuring air isolation between indoors and outdoors and providing insulation. Backflow preventers are structurally classified into three types: lift-type, swing-type, and butterfly-type. Swing-type backflow preventers can be further divided into single-disc, double-disc, and multi-disc types.

[0003] Existing double-disc swing check valves mainly consist of components such as a valve body, valve disc, valve body support, valve disc limiter, shaft, bracket, and spring. However, the valve disc of existing check valves has a downward-opening structure, which prevents the valve disc from opening fully, reducing the ventilation cross-section and consequently causing a decrease in exhaust volume and poor smoke extraction. Therefore, the inventors have proposed a vertical two-disc check valve to solve the above problems. Utility Model Content

[0004] The purpose of this invention is to solve the problem that the valve plate of the traditional backflow preventer is designed to open downwards, which prevents the valve plate from opening fully and reduces the ventilation cross section, thereby causing a decrease in exhaust volume and poor smoke extraction.

[0005] To achieve the above objectives, the basic solution of this utility model provides a vertical two-piece check valve, including a valve body, valve plates symmetrically rotatably connected within the valve body, and an adjustment assembly disposed between the valve body and the valve plates for controlling the opening and closing of the valve plates. One end of the valve body has a valve seat for installation and connection with a vent. The installation direction of the valve plates is perpendicular to the axial direction of the valve body. The valve plates have a semi-circular structure. The adjustment assembly includes a mounting bracket located at the bottom inner end of the valve body between the back sides of the symmetrical valve plates, a fixed platform located at the top of the mounting bracket on the axis of the valve body, an electric telescopic rod symmetrically hinged at both ends of the fixed platform to the back sides of the valve plates on both sides of the fixed platform, and a controller. The electric telescopic rod is electrically connected to the controller. A reinforcing telescopic rod is hinged between the sides of the symmetrically arranged electric telescopic rods. A sliding limiter is provided between the fixed platform and the reinforcing telescopic rod to guide the reinforcing telescopic rod to slide along the axis of the valve body.

[0006] The principle and effect of this basic scheme are as follows:

[0007] 1. Compared with the prior art, this utility model, by setting a valve body, valve plate, and valve seat, facilitates the sealing and isolation of the ventilation system in public places or the environment inside and outside the ventilation opening of the exhaust duct of a range hood. By setting a semi-circular valve plate and using an electric telescopic rod hinged to its back to drive its rotation, the opening and closing of the valve plate can be adjusted and controlled. The vertical and symmetrical arrangement of the valve plate allows for more convenient and quick adjustment of the opening angle, thereby adjusting the ventilation area to ensure that the exhaust volume meets the requirements. At the same time, placing the electric telescopic rod on the back of the valve plate can avoid the electric telescopic rod being directly contaminated by oil fumes, which would affect its normal telescopic operation. This ensures the normal opening and closing adjustment of the valve plate and ensures smooth exhaust of the valve body. It solves the problem that the valve plate of the traditional backflow preventer valve is a bottom-opening structure, which makes the valve plate unable to open to the full extent, reducing the ventilation cross section and causing the exhaust volume to decrease and the exhaust to be poor.

[0008] 2. Compared with the prior art, this utility model sets up a reinforced telescopic rod, which allows the valve plates on both sides of the reinforced telescopic rod to move. The sliding limiter allows the reinforced telescopic rod to slide along the axis of the valve body in a directional manner, so that its sliding trajectory serves as the bisector of the included angle between the valve plates on both sides, thereby restricting the two valve plates to rotate synchronously and making the opening angle of the valve plates on both sides the same. By setting up a fixed platform, the installation of the electric telescopic rod is facilitated and the stability of the overall structure is improved.

[0009] Furthermore, the valve disc has symmetrical mounting end grooves at both its top and bottom ends. An upper mounting seat is located at the center of the top end of the valve body's inner wall, and a lower mounting seat is located at the center of the bottom end of the valve body's inner wall. The bottom end face of each mounting end groove at the top of the valve disc has an upper mounting shaft rotatably connected to the upper mounting seat, and the top end face of each mounting end groove at the bottom of the valve disc has a lower mounting shaft rotatably connected to the lower mounting seat. By making the upper and lower mounting shafts detachable from the mounting end grooves, the valve disc can rotate around the mounting seat. The mounting seat facilitates the installation of the mounting shafts and the valve disc.

[0010] Furthermore, the inner bottom of the valve body is provided with a rear limiting block that connects to the rear side of the lower mounting base, and the length of the rear limiting block is not less than half the radius of the valve plate. By setting the rear limiting block, it is convenient to limit the opening angle of the valve plate, and at the same time, it is convenient to install the adjustment component.

[0011] Furthermore, the inner top of the valve body is provided with a front limiting block that connects to the front end of the upper mounting base, and the height of the front limiting block is greater than the height of the upper mounting base. By setting the front limiting block, it is convenient to limit the valve plate that rotates symmetrically within the valve body, thus preventing the valve plate from rotating in the opposite direction and causing reverse exhaust ventilation.

[0012] Furthermore, the sliding limiting component includes a sliding guide rail that is horizontally and vertically mounted on the fixed platform and perpendicular to the direction of the reinforcing telescopic rod, and a guide slider that is slidably connected to the sliding guide rail and slidably fitted onto the outside of the reinforcing telescopic rod. By setting the sliding guide rail and the guide slider, it is convenient to drive the extension and retraction of the reinforcing telescopic rod as the electric telescopic rod drives the valve plate to extend and retract. Thus, during the displacement change of the reinforcing telescopic rod with the electric telescopic rod, the guide slider restricts its longitudinal displacement to change along the direction of the sliding guide rail, thereby ensuring the symmetrical opening and closing adjustment of the two valve plates in the valve body.

[0013] Furthermore, the electric telescopic rod mounted on one side of the valve body has a first hinge seat on its inner middle section, and the electric telescopic rod mounted on the other side of the valve body has a second hinge seat on its inner middle section. Both ends of the pneumatic telescopic rod are hinged to the first and second hinge seats, respectively. By providing the first and second hinge seats, the connection between the pneumatic and electric telescopic rods is facilitated, as is the linkage connection between the valve plates on both sides. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 A three-dimensional structural diagram of a vertical two-piece check valve according to an embodiment of this application is shown;

[0016] Figure 2 It shows Figure 1 Enlarged view of the structure of section A in the middle;

[0017] Figure 3 This shows a rear view of the structure of a vertical two-piece check valve according to an embodiment of this application;

[0018] Figure 4 A side view of the structure of a vertical two-piece check valve according to an embodiment of this application is shown. Detailed Implementation

[0019] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0020] The reference numerals in the accompanying drawings include: valve body 1, valve plate 2, valve seat 3, mounting bracket 4, fixed platform 5, electric telescopic rod 6, reinforced telescopic rod 7, mounting end groove 8, upper mounting seat 9, upper mounting shaft 10, lower mounting shaft 11, rear limiting block 12, front limiting block 13, sliding guide rail 14, guide slider 15, first hinge seat 16, second hinge seat 17, and lower mounting seat 18.

[0021] A vertical two-piece check valve, implemented for example Figure 1 As shown: The system includes a valve body 1, a valve plate 2 symmetrically rotatably connected within the valve body 1, and an adjusting assembly located between the valve body 1 and the valve plate 2 for controlling the opening and closing of the valve plate 2. The end of the valve body 1 closest to the vent is designated as the front end, and the end of the valve body 1 away from the vent is designated as the rear end. A valve seat 3 is provided on the outer side of the front end of the valve body 1 for mounting and connecting with the vent. The valve seat 3 may include, but is not limited to, being fixed to the outer end face of the vent using threaded fasteners. The mounting direction of the valve plate 2 is perpendicular to the axial direction of the valve body 1. Figure 1 and Figure 3 As shown, valve plate 2 has a semi-circular structure, as... Figure 1 and Figure 4 As shown, the adjustment assembly includes a mounting bracket 4 located at the inner bottom end of the valve body 1 and between the back sides of the symmetrical valve plates 2; a fixed platform 5 located at the top of the mounting bracket 4 and on the axis of the valve body 1; an electric telescopic rod 6 symmetrically hinged at both ends of the fixed platform 5 and between the back sides of the valve plates 2 located on both sides of the fixed platform 5; and a controller. The electric telescopic rod 6 is electrically connected to the controller, wherein the controller includes, but is not limited to, a PLC controller, such as... Figure 2 and Figure 3 As shown, a reinforcing telescopic rod 7 is hinged between the sides of the symmetrically arranged electric telescopic rods 6. A sliding limiter is provided between the fixed platform 5 and the reinforcing telescopic rod 7 to guide the reinforcing telescopic rod 7 to slide along the axis of the valve body 1.

[0022] Among them, such as Figure 3 and Figure 4 As shown, the valve plate 2 has symmetrical mounting end grooves 8 at both the top and bottom ends. The valve body 1 has an upper mounting seat 9 at the middle of the top end of the inner wall and a lower mounting seat 18 at the middle of the bottom end of the inner wall. The bottom end face of the mounting end groove 8 at the top of the valve plate 2 is provided with an upper mounting shaft 10 that is rotatably connected to the upper mounting seat 9. The top end face of the mounting end groove 8 at the bottom of the valve plate 2 is provided with a lower mounting shaft 11 that is rotatably connected to the lower mounting seat 18.

[0023] Among them, such as Figure 1 , Figure 3 and Figure 4 As shown, the inner bottom of the valve body 1 is provided with a rear limiting block 12 that is connected to the rear side of the lower mounting seat 18. The length of the rear limiting block 12 is not less than half the radius of the valve plate 2.

[0024] Among them, such as Figure 4 As shown, the inner top of the valve body 1 is provided with a front limiting block 13 that is connected to the front end of the upper mounting seat 9, and the height of the front limiting block 13 is greater than the height of the upper mounting seat 9.

[0025] Among them, such as Figure 2 As shown, the sliding limiting component includes a sliding guide rail 14 that is horizontally and vertically disposed on the fixed platform 5 and perpendicular to the direction of the reinforcing telescopic rod 7, and a guide slider 15 that is slidably connected to the sliding guide rail 14 and slidably fitted on the outside of the reinforcing telescopic rod 7.

[0026] Among them, such as Figure 2 As shown, the electric telescopic rod 6 installed on the valve plate 2 on the left side of the valve body 1 has a first hinge seat 16 on the inner side of the middle part, and the electric telescopic rod 6 installed on the valve plate 2 on the right side of the valve body 1 has a second hinge seat 17 on the inner side of the middle part. The two ends of the pneumatic telescopic rod are respectively hinged to the first hinge seat 16 and the second hinge seat 17.

[0027] In the specific implementation of this utility model, the valve seat 3 is first fixed and tightened onto the outer end face of the vent using four threaded fasteners, so that the valve body 1 is connected to the vent. During use, when it is necessary to cooperate with a ventilation system or range hood to exhaust air and smoke from the vent, the controller activates the electric telescopic rod 6 to retract. During the retraction of the electric telescopic rod 6, its own angle and the orientation of the valve plate 2 also rotate. The valve plate 2 rotates rearward, putting the valve body 1 in an open ventilation state. At this time, the ventilation system or range hood is activated, allowing the vent to open for exhaust air and smoke. During the opening of the valve plate 2, the pneumatic telescopic rod also retracts along the angle change of the electric telescopic rod 6. When the pneumatic telescopic rod retracts, it drives the guide slider 15 to slide rearward along the sliding guide rail 14. When the valve plate 2 rotates rearward and opens until it abuts against the rear limiting block 12, this is the maximum opening angle of the valve plate 2.

[0028] When it is necessary to use a ventilation system or range hood to stop the exhaust and smoke removal from the vent, first shut down the ventilation system and range hood. Then, the controller activates the extension of the electric telescopic rod 6. During the extension of the electric telescopic rod 6, its own angle and the orientation of the valve plate 2 also rotate. The valve plate 2 rotates towards the front end and closes the valve body 1, thus closing the vent for exhaust and smoke removal. During the closing of the valve plate 2, the pneumatic telescopic rod also extends along the angle of the electric telescopic rod 6. When the pneumatic telescopic rod extends, it drives the guide slider 15 to slide towards the front end along the sliding guide rail 14. When the valve plate 2 rotates forward and closes until it abuts against the front limit block 13, the valve plate 2 completely closes the valve body 1.

[0029] Compared with existing technologies, this utility model, by setting up a valve body 1, a valve plate 2, and a valve seat 3, facilitates the sealing and isolation of the environment inside and outside the ventilation system of public places or the exhaust duct of a range hood. The semi-circular valve plate 2, driven by an electric telescopic rod 6 hinged to its back, allows for the opening and closing control of the valve plate 2. The vertically and symmetrically arranged valve plate 2 allows for more convenient and quick adjustment of the opening angle, thereby adjusting the ventilation area to ensure the exhaust volume meets requirements. The addition of a reinforcing telescopic rod 7 further strengthens the telescopic mechanism. The valve plates 2 on both sides of the 7 are connected and moved. The sliding limiter makes the reinforced telescopic rod 7 slide along the axis of the valve body 1, so that its sliding trajectory is the bisector of the included angle between the two valve plates 2, thereby restricting the two valve plates 2 to rotate synchronously, so that the opening angle of the two valve plates 2 is the same. By setting the fixed platform 5, the installation of the electric telescopic rod 6 is facilitated and the stability of the overall structure is improved. This solves the problem that the valve plates of the traditional backflow preventer valve are designed to open downwards, which makes the valve plates unable to open to the full position, thus reducing the ventilation cross section and causing the exhaust volume to decrease and the smoke exhaust to be poor.

[0030] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A vertical two-piece check valve, characterized in that: The device includes a valve body, valve plates symmetrically rotatably connected within the valve body, and an adjustment assembly located between the valve body and the valve plates for controlling the opening and closing of the valve plates. One end of the valve body has a valve seat for connection to a vent. The valve plates are installed perpendicular to the axial direction of the valve body and have a semi-circular structure. The adjustment assembly includes a mounting bracket located at the bottom inner end of the valve body between the back sides of the symmetrical valve plates, a fixed platform located at the top of the mounting bracket on the axial direction of the valve body, electric telescopic rods symmetrically hinged at both ends of the fixed platform to the back sides of the valve plates on both sides of the fixed platform, and a controller. The electric telescopic rods are electrically connected to the controller. A reinforcing telescopic rod is hinged between the sides of the symmetrically arranged electric telescopic rods. A sliding limiter is provided between the fixed platform and the reinforcing telescopic rod to guide the reinforcing telescopic rod to slide along the axial direction of the valve body.

2. A vertical two-piece check valve according to claim 1, characterized in that, The valve plate has symmetrical mounting end grooves at both the top and bottom. The valve body has an upper mounting seat at the middle of the top of the inner wall and a lower mounting seat at the middle of the bottom of the inner wall. The bottom end face of the mounting end groove at the top of the valve plate is provided with an upper mounting shaft that is rotatably connected to the upper mounting seat, and the top end face of the mounting end groove at the bottom of the valve plate is provided with a lower mounting shaft that is rotatably connected to the lower mounting seat.

3. A vertical two-piece check valve according to claim 2, characterized in that, The valve body has a rear limiting block at its inner bottom that connects to the rear side of the lower mounting base. The length of the rear limiting block is not less than half the radius of the valve plate.

4. A vertical two-piece check valve according to claim 3, characterized in that, The valve body has a front limiting block at its inner top that is connected to the front end of the upper mounting base, and the height of the front limiting block is greater than the height of the upper mounting base.

5. A vertical two-piece check valve according to claim 4, characterized in that, The sliding limiting component includes a sliding guide rail that is horizontally and vertically disposed on the fixed platform and perpendicular to the direction of the reinforcing telescopic rod, and a guide slider that is slidably connected to the sliding guide rail and slidably fitted on the outside of the reinforcing telescopic rod.

6. A vertical two-piece check valve according to claim 5, characterized in that, The electric telescopic rod installed on one side of the valve body has a first hinge seat on the inner side of its middle portion, and the electric telescopic rod installed on the other side of the valve body has a second hinge seat on the inner side of its middle portion. The two ends of the pneumatic telescopic rod are respectively hinged to the first hinge seat and the second hinge seat.

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