Novel check valve

Abstract

The invention provides a novel check valve, and relates to the technical field of flue check valves. The check valve comprises a valve body and a rotary cover plate rotationally connected in the valve body, and further comprises an inclined plate, the inclined plate is obliquely and fixedly connected in the valve body, the high end of the inclined plate is arranged close to the air inlet side of the valve body, the top edge of the rotary cover plate is rotationally connected to the air exhaust side of the inclined plate, and the top edge of the rotary cover plate is fixedly connected to the air exhaust side of the inclined plate. The baffle plate is used for conducting or blocking the inclined plate; the balancing weight is installed on the top edge of the rotating cover plate, and in the blocking state, the gravity center of the balancing weight and the gravity center of the rotating cover plate are close to the exhaust side of the top edge of the rotating cover plate correspondingly; and in a complete conduction state, the gravity centers of the balancing weight and the rotary cover plate are respectively arranged along the ventilation direction. The sealing performance can be guaranteed for a long time, and the smoke exhaust efficiency is effectively improved.

Description

Technical Field

[0001] The present invention relates to the technical field of flue check valves, in particular to a new type of check valve. Background Art

[0002] The check valve is installed in the flue to prevent the smoke in the flue from entering the residents. A torsion spring is installed at the rotating cover and the valve body of the existing check valve. The rotating cover is closed by the elastic force of the torsion spring and opened by the wind pressure overcoming the elastic force. After long-term use, the elastic force of the torsion spring decays, causing a gap between the rotating cover and the valve body, thereby causing the oil smoke in the flue to enter the residents. At the same time, the larger the angle at which the rotating cover is opened, the greater the wind pressure is required to overcome the elastic force of the torsion spring. However, when the wind pressure is low, the rotating cover will immediately be reduced in opening by the torsion spring, affecting the smoke exhaust effect.

[0003] Therefore, there is an urgent need for a new check valve that can ensure sealing for a long time and effectively improve smoke exhaust efficiency. Summary of the Invention

[0004] The present invention aims to provide a novel check valve that solves the technical problem of poor sealing in existing check valves, which affects smoke exhaust efficiency. The various technical effects that can be achieved by the preferred technical solution among the various technical solutions provided by the present invention are described in detail below.

[0005] To achieve the above objectives, the present invention provides the following technical solutions: The present invention provides a novel check valve, comprising a valve body and a rotating cover plate rotatably connected to the valve body, and further comprising: An inclined plate, the inclined plate is fixedly connected to the valve body in an inclined manner, the high end of the inclined plate is arranged close to the air inlet side of the valve body, and the top edge of the rotating cover plate is rotatably connected to the air outlet side of the inclined plate and is used to conduct or block the inclined plate; A counterweight block is installed on the top edge of the rotating cover. When in a blocked state, the center of gravity of the counterweight block and the rotating cover are respectively close to the exhaust side of the top edge of the rotating cover; when in a fully conductive state, the center of gravity of the counterweight block and the rotating cover are respectively set along the ventilation direction.

[0006] Preferably, it also includes: The magnet is fixedly connected to the top of the inner wall of the valve body and is located on the exhaust side of the inclined plate. When in the blocked state, the counterweight block and the magnet are magnetically attracted to each other. When in the conducting state, the counterweight block and the magnet are separated by the wind pressure on the air inlet side of the inclined plate.

[0007] Preferably, it also includes: The vent is opened at the lower end of the inclined plate, and the rotating cover is correspondingly arranged on the exhaust side of the vent and is used to open or block the vent.

[0008] Preferably, it also includes: A second sealing strip is installed on the air inlet side edge of the rotating cover plate and is arranged corresponding to the edge of the vent.

[0009] Preferably, the valve body comprises: a base, the base being fixedly connected to the indoor flue and having a first sealing strip disposed between the base and the indoor flue; The pipe body is detachably connected to the base, the inclined plate is obliquely fixedly connected to the inner wall of the pipe body, and the magnet is fixedly connected to the base and is located inside the pipe body.

[0010] Preferably, the valve body further comprises: A mounting ring is coaxially fixedly connected to the inlet of the pipe body and is communicated with the bellows on the range hood.

[0011] Preferably, the valve body further includes: Limiting openings, wherein a plurality of the limiting openings are circumferentially arranged at the exhaust end of the duct body; A plurality of limiting protrusions are circumferentially arranged on the inner side wall of the base and correspondingly clamped in the limiting openings.

[0012] Preferably, the limiting opening is configured as an L-shaped opening, and the limiting protrusion is inserted into the limiting opening by manually pushing and rotating the pipe body.

[0013] Preferably, it also includes: Fixed blocks, two groups of fixed blocks are respectively fixedly connected to the exhaust end of the base; A fastening plate is located in the indoor flue and is fixedly connected to the fixing block via a fastening rope.

[0014] Preferably, the fastening piece includes: curved pieces; U-shaped blocks, one end of the two groups of U-shaped blocks are symmetrically fixedly connected to the two ends of the arc-shaped piece, and are arranged corresponding to the inner wall of the indoor flue, and the fastening rope is tied to the U-shaped block.

[0015] In the technical solution provided by the present invention, the rotating cover is installed on the inclined plate, and its main function is to block the inclined plate (i.e., close the valve body) by the gravity of the rotating cover itself, and combined with the gravity of the counterweight, the rotating cover completes the blocking of the inclined plate by the gravity of the counterweight and the rotating cover, which can make the sealing between the rotating cover and the inclined plate better, and will not affect the sealing after a long time of use, thereby improving durability; when in the conduction state, the center of gravity of the counterweight and the rotating cover are respectively set along the ventilation direction. Before conduction, when the range hood is started to generate wind pressure, the rotating cover is pushed The cover plate rotates and simultaneously overcomes the gravity of the counterweight block and the rotating cover plate, and begins to conduct. When the counterweight block moves from the exhaust side of the top edge of the rotating cover plate to the air inlet side, the center of gravity of the counterweight block and the rotating cover plate is set along the ventilation direction, until the counterweight block contacts the exhaust side of the inclined plate, the rotating cover plate is set horizontally, and enters a fully conductive state. As long as the pressure of the oil smoke is greater than the gravity difference between the counterweight block and the rotating cover plate, the rotating cover plate can be pushed open. Even if the oil smoke pressure decreases, the fully conductive state can be maintained, achieving the purpose of effectively improving the exhaust efficiency. Overall, this application can ensure long-term sealing and effectively improve the exhaust efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the blocking state of the present invention; Figure 3 This is a schematic diagram of the fully conductive state of the present invention; Figure 4 It is a schematic structural diagram of the fastening piece of the present invention.

[0018] In the figure, 1-base; 2-pipe body; 3-mounting ring; 4-limiting opening; 5-fixing block; 6-limiting protrusion; 7-rotating cover; 8-mounting hole; 9-first sealing strip; 10-magnet; 11-counterweight block; 12-tilt plate; 13-second sealing strip; 14-leveler; 15-ventilation port; 16-U-shaped block; 17-arc-shaped piece. DETAILED DESCRIPTION

[0019] To make the objectives, technical solutions, and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other implementations obtained by those of ordinary skill in the art without inventive effort are within the scope of protection of the present invention.

[0020] refer to Figure 1-4 The specific embodiment of the present invention provides a new check valve, comprising a valve body and a rotary cover plate 7 rotatably connected to the valve body, and further comprising: The inclined plate 12 is fixedly connected to the valve body at an angle. The high end of the inclined plate 12 is located near the air inlet side of the valve body. The top edge of the rotating cover plate 7 is rotatably connected to the air outlet side of the inclined plate 12 and is used to open or close the inclined plate 12. The angle between the inclined plate 12 and the horizontal plane is 30 degrees. The counterweight 11 is installed on the top edge of the rotating cover 7. When in the blocked state, the center of gravity of the counterweight 11 and the rotating cover 7 are respectively close to the exhaust side of the top edge of the rotating cover 7, and the rotating cover 7 completes the blocking of the inclined plate 12 by the gravity of the counterweight 11 and the rotating cover 7; when in the fully conductive state, the center of gravity of the counterweight 11 and the rotating cover 7 are respectively arranged along the ventilation direction, the counterweight 11 is arranged in contact with the exhaust side of the inclined plate 12, the rotating cover 7 is arranged horizontally, and the rotating cover 7 makes the inclined plate 12 fully conductive by the gravity of the counterweight 11 and the wind pressure from the air inlet side of the inclined plate 12.

[0021] The check valve is installed at the flue to prevent the smoke in the flue from entering the residents; a torsion spring is installed at the rotating cover plate 7 and the valve body rotation position of the existing check valve, and the rotating cover plate 7 is closed by the elastic force of the torsion spring and opened by the wind pressure overcoming the elastic force. After long-term use, the elastic force of the torsion spring decays, causing a gap between the rotating cover plate 7 and the valve body, thereby causing the oil smoke in the flue to enter the residents; at the same time, the larger the angle at which the rotating cover plate 7 is opened, the greater the wind pressure is required to overcome the elastic force of the torsion spring, but when the wind pressure is small, the rotating cover plate 7 will be immediately reduced in opening by the torsion spring, affecting the smoke exhaust effect. In the present application, the rotary cover plate 7 is installed on the inclined plate 12, and its main function is to block the inclined plate 12 (i.e., close the valve body) by the gravity of the rotary cover plate 7 itself, and add the gravity of the counterweight 11. The rotary cover plate 7 completes the blockage of the inclined plate 12 by the gravity of the counterweight 11 and the rotary cover plate 7, which can make the sealing between the rotary cover plate 7 and the inclined plate 12 better, and will not affect the sealing after a long time of use, thereby improving durability. When in the fully turned-on state, the centers of gravity of the counterweight 11 and the rotary cover plate 7 are respectively set along the ventilation direction. Before the conduction, when the range hood is started to generate wind pressure, the rotary cover plate is pushed. 7 rotates and simultaneously overcomes the gravity of the counterweight 11 and the rotating cover 7, and begins to conduct. When the counterweight 11 moves from the exhaust side of the top edge of the rotating cover 7 to the air inlet side, the center of gravity of the counterweight 11 and the rotating cover 7 is set along the ventilation direction, until the counterweight 11 is in contact with the exhaust side of the inclined plate 12, the rotating cover 7 is set horizontally, and enters a fully conductive state; as long as the pressure of the oil smoke is greater than the gravity difference between the counterweight 11 and the rotating cover 7, the rotating cover 7 can be pushed open. Even if the oil smoke pressure decreases, the fully conductive state can be maintained, achieving the purpose of effectively improving the exhaust efficiency. Overall, the present application can ensure long-term sealing and effectively improve the exhaust efficiency.

[0022] Further optimization plans also include: Magnet 10 is fixedly connected to the top of the inner wall of the valve body and is located on the exhaust side of the inclined plate 12. When in the blocked state, the counterweight block 11 and the magnet 10 are magnetically attracted to each other. When in the conducting state, the counterweight block 11 and the magnet 10 are separated by the wind pressure on the air inlet side of the inclined plate 12.

[0023] The main function of the magnet 10 is to generate magnetic attraction between the counterweight 11 when the rotating cover 7 is in the closed state, and the gravity of the counterweight 11 and the rotating cover 7 further ensures the sealing between the rotating cover 7 and the inclined plate 12, as well as the durability of the sealing.

[0024] Further optimization plans also include: The vent 15 is opened at the lower end of the inclined plate 12 , and the rotating cover plate 7 is correspondingly arranged on the exhaust side of the vent 15 and is used to open or block the vent 15 .

[0025] When the rotary cover 7 covers the vent 15 , it is in a blocked state; when the rotary cover 7 is separated from the vent 15 , it is in a conducting state; and when the rotary cover 7 is horizontal, it is in a fully conducting state.

[0026] Further optimization plans also include: The second sealing strip 13 is installed on the air inlet side edge of the rotating cover 7 and is arranged corresponding to the edge of the ventilation opening 15.

[0027] In the blocking state, the second sealing strip 13 is squeezed by the rotating cover plate 7 , thereby effectively ensuring the sealing between the rotating cover plate 7 and the vent 15 .

[0028] Further optimization scheme, the valve body includes: Base 1, which is fixedly connected to the indoor flue, and a first sealing strip 9 is provided between the base 1 and the indoor flue; The pipe body 2 is detachably connected to the base 1 , the inclined plate 12 is obliquely fixedly connected to the inner wall of the pipe body 2 , and the magnet 10 is fixedly connected to the base 1 and is located inside the pipe body 2 .

[0029] The pipe body 2 is detachably connected to the base 1 , which is convenient for replacing the pipe body 2 and the rotating cover 7 inside the pipe body 2 .

[0030] To further optimize the solution, the valve body also includes: The mounting ring 3 is coaxially fixedly connected to the inlet of the pipe body 2 and is communicated with the bellows on the range hood.

[0031] The mounting ring 3 adopts a variable diameter structure, which is convenient for adapting to corrugated pipes of different sizes; it is suitable for corrugated pipes (aluminum foil pipes) of multiple specifications such as 160 / 180 / 200mm.

[0032] To further optimize the solution, the valve body also includes: A plurality of limit openings 4 are circumferentially provided at the exhaust end of the duct body 2; The limiting protrusions 6 , several of which are circumferentially arranged on the inner side wall of the base 1 , are correspondingly clamped in the limiting openings 4 .

[0033] By limiting the limiting protrusion 6 in the limiting opening 4, the purpose of firmly connecting the pipe body 2 and the base 1 is achieved.

[0034] As a further optimized solution, the limiting opening 4 is set as an L-shaped opening, and the limiting protrusion 6 is inserted into the limiting opening 4 by manually pushing axially and rotating the pipe body 2 circumferentially in sequence.

[0035] The small diameter end of the limiting protrusion 6 is fixedly connected to the inner wall of the base 1. When the small diameter end of the limiting protrusion 6 enters the L-shaped opening (i.e., the limiting opening 4), the pipe body 2 is pressed against the inner wall of the base 1 through the large diameter end of the limiting protrusion 6 until the limiting protrusion 6 moves to the bottom of the L-shaped opening, thereby completing the stable connection between the pipe body 2 and the base 1; the pipe body 2 can be separated from the base 1 by reversing the operation of the pipe body 2.

[0036] Further optimization plans also include: Fixed blocks 5, two groups of fixed blocks 5 are respectively fixedly connected to the exhaust end of the base 1; The fastening plate (not marked in the figure) is located in the indoor flue and is fixedly connected to the fixing block 5 by a fastening rope.

[0037] When installing the base 1, first extend the fastening piece with the fastening rope into the indoor flue, then hang it on the fixing block 5, and tighten the fastening rope through the fixing block 5 to install the base 1 on the outer wall of the indoor flue.

[0038] Further optimization scheme, the fastening piece includes: curved piece 17; The U-shaped blocks 16 are symmetrically fixed to the two ends of the arc-shaped piece 17 at one end of each group of U-shaped blocks 16 , and are arranged corresponding to the inner wall of the indoor flue. The fastening ropes are tied to the U-shaped blocks 16 .

[0039] The main function of the U-shaped block 16 is to facilitate the passage of the fastening rope and to limit the arc-shaped piece 17 on the inner wall of the indoor flue.

[0040] Further optimization plans also include: Mounting holes 8, a plurality of mounting holes 8 are opened on the base 1, and a plurality of screws pass through the mounting holes 8 and are fixedly connected to the indoor flue.

[0041] In addition to the above-mentioned fixing method of installing the base 1 through the fixing block 5 and the fastening plate, the base 1 can also be fastened to the outer wall of the indoor flue by passing screws through the mounting hole 8, providing another installation method, which makes it easier for users to choose a suitable installation method.

[0042] Further optimization plans also include: The level 14 is installed at the bottom of the pipe body 2 and is used to detect whether the pipe body 2 and the base 1 are properly installed on the outer wall of the indoor flue, thereby ensuring the installation position accuracy of the integral check valve. The level 14 adopts a common bubble level.

[0043] On the whole, the opening angle of the rotating cover 7 of the present application exceeds 60° (the angle between the rotating cover 7 and the inclined plate 12). The larger the opening angle, the smaller the closing force. By setting the mass of the counterweight 11 and the rotating cover 7, when it is fully opened, the closing force is only 1 / 3 of that when it is closed, and the exhaust volume is greatly increased; wherein, the closing force is the force when the rotating cover 7 is blocked or has a tendency to block, which is generated by the gravity of the rotating cover 7. In the blocked state, the closing force is the sum of the mass of the counterweight 11 and the rotating cover 7, and the magnetic force; when it is fully turned on, the closing force is the gravity difference between the rotating cover 7 and the counterweight 11.

[0044] For example, when the gravity-enforced seal between the counterweight 11 and the rotating cover 7 exceeds a negative pressure of 50 Pa, the closing force, combined with the second sealing strip 13, effectively ensures a tight seal. Furthermore, when magnetic sealing is applied, it effectively prevents accidental opening at high negative pressures exceeding 50 Pa. The check valve can only open when the wind pressure of the oil smoke overcomes the combined force of the magnetic force, the gravity of the counterweight 11, and the rotating cover 7.

[0045] This application adopts a single-sash rotating cover 7, which has a simple structure and a small number of accessories. At the same time, this application has a simple appearance, no redundant features within the visual range, and is beautiful and practical. It adopts a building block (detachable) combination, which has a simple structure, easy assembly, and low process cost. This application adopts 13800mm 2 Extra-large exhaust hole, single-door design, and exhaust pipe with an equivalent diameter of 132mm.

[0046] It should be noted that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like used herein to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are intended only to facilitate the description of this application and to simplify the description, and do 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 should not be construed as limiting this application. In addition, the terms "first", "second", "third", etc. are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0047] It should also be noted that, unless otherwise specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they can refer to fixed, detachable, or integral connections; mechanical or electrical connections; and direct or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0048] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A novel check valve, comprising a valve body and a rotary cover plate (7) rotatably connected to the valve body, characterized in that: Also includes: An inclined plate (12), the inclined plate (12) is fixedly connected to the valve body at an angle, the high end of the inclined plate (12) is arranged close to the air inlet side of the valve body, and the top edge of the rotating cover plate (7) is rotatably connected to the air outlet side of the inclined plate (12) and is used to conduct or block the inclined plate (12); A counterweight (11), the counterweight (11) being mounted on the top edge of the rotating cover (7); when in a blocked state, the centers of gravity of the counterweight (11) and the rotating cover (7) are respectively close to the exhaust side of the top edge of the rotating cover (7); when in a fully conductive state, the centers of gravity of the counterweight (11) and the rotating cover (7) are respectively arranged along the ventilation direction.

2. The new check valve according to claim 1 is characterized in that: Also includes: The magnet (10) is fixedly connected to the top of the inner wall of the valve body and is located on the exhaust side of the inclined plate (12). When in a blocked state, the counterweight (11) and the magnet (10) are magnetically attracted to each other. When in a conducting state, the counterweight (11) and the magnet (10) are separated by the wind pressure on the air inlet side of the inclined plate (12).

3. The new check valve according to claim 1 is characterized in that: Also includes: The vent (15) is provided at the lower end of the inclined plate (12); the rotating cover (7) is correspondingly arranged on the exhaust side of the vent (15) and is used to open or block the vent (15).

4. The new check valve according to claim 3 is characterized in that: Also includes: A second sealing strip (13), the second sealing strip (13) is installed on the air inlet side edge of the rotating cover plate (7) and is arranged corresponding to the edge of the ventilation opening (15).

5. The novel check valve according to claim 2 is characterized in that: The valve body comprises: A base (1), the base (1) being fixedly connected to an indoor flue, and a first sealing strip (9) being provided between the base (1) and the indoor flue; A pipe body (2), wherein the pipe body (2) is detachably connected to the base (1), the inclined plate (12) is obliquely fixedly connected to the inner wall of the pipe body (2), and the magnet (10) is fixedly connected to the base (1) and is located inside the pipe body (2).

6. The novel check valve according to claim 5 is characterized in that: The valve body further comprises: A mounting ring (3) is coaxially fixedly connected to the inlet of the pipe body (2) and is in communication with the bellows on the range hood.

7. The novel check valve according to claim 5 is characterized in that: The valve body further comprises: Limiting openings (4), wherein a plurality of the limiting openings (4) are circumferentially arranged at the exhaust end of the pipe body (2); Limiting protrusions (6), wherein a plurality of the limiting protrusions (6) are circumferentially arranged on the inner side wall of the base (1) and correspondingly clamped in the limiting openings (4).

8. The novel check valve according to claim 7 is characterized in that: The limiting opening (4) is configured as an L-shaped opening, and the limiting protrusion (6) is inserted into the limiting opening (4) by manually pushing and rotating the pipe body (2).

9. The novel check valve according to claim 5 is characterized in that: Also includes: Fixed blocks (5), two groups of the fixed blocks (5) are respectively fixedly connected to the exhaust end of the base (1); A fastening plate is located in the indoor flue and is fixedly connected to the fixing block (5) via a fastening rope.

10. The novel check valve according to claim 9, characterized in that: The fastening piece comprises: curved piece (17); U-shaped blocks (16), one end of the two groups of U-shaped blocks (16) are symmetrically fixedly connected to the two ends of the arc-shaped piece (17), and are arranged corresponding to the inner wall of the indoor flue, and the fastening rope is tied to the U-shaped block (16).

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