Check valve assembly structure

Abstract

The utility model provides a check valve assembly structure which comprises a valve shell, a valve plate and a spring piece, the valve shell is tubular, the front end and the rear end of the valve shell are provided with an inlet and an outlet respectively, the upper side of the valve plate is rotatably connected to the inner wall of the upper portion of the valve shell through a transverse shaft, the transverse shaft is perpendicular to the axial direction of the valve shell, and a protruding sealing strip is arranged on the inner wall of the lower portion of the valve shell. The lower side of the valve plate is located between the sealing strip and the outlet, one end of the spring piece is connected to the valve shell, the other end of the spring piece acts on the valve plate, the spring piece is used for pushing the valve plate to rotate around the transverse shaft, and the thrust direction enables the lower side of the valve plate to turn from the outlet to the inlet. A gap is formed between the position, abutting against the valve plate, of the sealing strip and the inner wall of the lower portion of the valve shell. According to the scheme, the situation that air exhaust is not smooth due to oil stain adhesion of the valve plate and the valve shell can be remarkably improved, the single valve plate facilitates reduction of the size of the valve shell, and installation is more convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of valve bodies, in particular to a check valve component structure. Background Art

[0002] As an important component of range hoods and integrated stoves, the check valve is generally installed on the flue gas duct. While ensuring normal smoke exhaust, it can effectively prevent the reverse inflow of external oil smoke.

[0003] The main structure of the check valve currently used in the market includes a valve body and a valve disc, and the valve disc can only rotate in one direction relative to the valve body. In actual use, as time goes by, oil and dirt are likely to adhere to the valve disc and the valve housing, resulting in poor exhaust and reduced fume extraction effect. In order to alleviate this problem, most of the current check valves adopt a double valve disc structure, that is, two valve discs are arranged in a circular valve housing, but this structure will increase the volume and make installation inconvenient. Utility Model Content

[0004] The utility model aims to provide a check valve assembly structure which has a simple structure, is easy to install, and can improve the situation where the exhaust is not smooth due to the adhesion of oil and dirt between the valve plate and the valve housing.

[0005] In order to solve the above problems, the utility model provides a check valve assembly structure, including a valve housing, a valve plate and a spring member, the valve housing is tubular and has an inlet and an outlet respectively provided at the front and rear ends, the upper side of the valve plate is rotatably connected to the inner wall of the upper part of the valve housing by a transverse axis, and the transverse axis is perpendicular to the axial direction of the valve housing, the inner wall of the lower part of the valve housing is provided with a raised sealing strip, the lower side of the valve plate is located between the sealing strip and the outlet, one end of the spring member is connected to the valve housing and the other end acts on the valve plate, the spring member is used to push the valve plate to rotate around the transverse axis and the thrust direction is such that the lower side of the valve plate turns from the outlet to the inlet, when the lower side of the valve plate abuts against the sealing strip, the valve plate blocks the inlet and the outlet, and there is a gap between the position where the sealing strip abuts the valve plate and the inner wall of the lower part of the valve housing.

[0006] Compared with the prior art, the above scheme provides a raised sealing strip on the inner wall of the lower part of the valve shell. When exhaust is carried out, oil smoke enters from the inlet of the valve shell and pushes the lower side of the valve plate to rotate toward the outlet. At this time, the valve plate is in an open state, and the inlet and outlet of the valve shell are connected to each other, thereby realizing normal exhaust. After the exhaust is completed, the spring member pushes the valve plate to rotate the lower side of the valve plate toward the inlet until the lower side of the valve plate abuts against the sealing strip. At this time, the inlet and outlet of the valve shell are blocked to prevent the backflow of oil smoke at the outlet of the valve shell. Since there is a gap between the position where the sealing strip abuts the valve plate and the inner wall of the lower part of the valve shell, the poor exhaust caused by the adhesion of oil and dirt between the valve plate and the valve shell can be significantly improved. In addition, a single valve plate is conducive to reducing the volume of the valve shell, thereby making installation more convenient.

[0007] In an improved solution, the sealing strip is closer to the outlet relative to the horizontal axis, so that when the lower side of the valve plate abuts against the sealing strip, the lower side of the valve plate is inclined toward the outlet, and an oil receiving plate is provided on the inner wall of the lower part of the valve housing near the outlet. The valve plate inclined toward the outlet is conducive to the discharge of oil to the outlet side of the valve housing and accumulation in the oil receiving plate, thereby reducing the accumulation of oil on the side of the valve plate near the inlet.

[0008] In an improved solution, the thickness of the sealing strip gradually decreases in a direction approaching the outlet, so that the cross-sectional shape of the sealing strip is triangular or arc-shaped, thereby reducing the contact area between the valve plate and the sealing strip while ensuring the sealing performance of the two.

[0009] In an improved solution, the inner wall of the upper part of the valve housing is provided with a fixed axis parallel to the horizontal axis, the spring member is a torsion spring and is sleeved on the fixed axis, one end of the spring member is connected to the valve housing and the other end is connected to the valve plate, so that the valve plate is pushed by the torsion spring.

[0010] In an improved solution, fixed seats are respectively provided on both sides of the inner wall of the upper part of the valve housing, and the fixed seats are provided with a first slot. The two ends of the fixed shaft are respectively snapped into the first slots of the two fixed seats, and each fixed seat is detachably connected to a fixed block, and the fixed block is used to close the first slot, thereby facilitating the assembly of the fixed shaft.

[0011] In an improved solution, the fixing seat is also provided with a second slot, which is arranged side by side with the first slot, and the two ends of the horizontal axis are respectively connected to the second slots of the two fixing seats, and the fixing block is used to simultaneously close the first slot and the second slot of the fixing seat, thereby facilitating the assembly of the horizontal axis.

[0012] In an improved solution, the torsion springs are two and are sleeved on the fixed shaft at an interval, thereby achieving a more stable pushing effect on the valve plate.

[0013] In an improved solution, a first limiting groove is provided on the inner wall of the upper part of the valve housing corresponding to the position of the torsion spring, and a second limiting groove is provided on the valve plate corresponding to the position of the torsion spring. One end of the torsion spring is clamped to the first limiting groove and the other end is clamped to the second limiting groove, thereby ensuring that the torsion spring will not be displaced and the structure is more stable.

[0014] In an improved solution, the radial cross-section of the valve housing is an oblate shape with a large width and a small height, and the shape of the valve plate is adapted to the radial cross-section shape of the valve housing, thereby ensuring the smoke passing area while reducing the influence of gravity on the rotation of the valve plate due to the corresponding reduction in the height of the valve plate.

[0015] In an improved solution, a mounting seat is further included, and the valve housing is fixedly connected to the mounting seat by fasteners. The mounting seat can be pre-assembled to the corresponding position of the flue. After the mounting seat is assembled, the valve housing is connected to the mounting seat by fasteners, thereby effectively reducing the difficulty of assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is an overall schematic diagram of a check valve assembly structure;

[0017] Figure 2 It is a top view schematic diagram of a check valve assembly structure;

[0018] Figure 3 For along Figure 2 Schematic cross-sectional view of the AA section line;

[0019] Figure 4 It is a front view schematic diagram of a check valve assembly structure;

[0020] Figure 5 For along Figure 4 Schematic cross-sectional view of the BB section line;

[0021] Figure 6 for Figure 5 A partial enlarged schematic diagram of the C area in the middle.

[0022] Description of reference numerals:

[0023] 1. Valve housing; 11. Inlet; 12. Outlet; 13. First limit groove; 2. Valve plate; 21. Horizontal axis; 22. Second limit groove; 3. Torsion spring; 31. Fixed axis; 4. Sealing strip; 5. Fixed seat; 51. Fixed block; 52. First slot; 53. Second slot; 6. Oil receiving plate; 7. Mounting seat; 71. Fastener. DETAILED DESCRIPTION

[0024] It should be understood by those skilled in the art that the following embodiments are only used to explain the technical principles of the embodiments of the present application and are not intended to limit the protection scope of the embodiments of the present application. Those skilled in the art may make adjustments to them as needed to adapt to specific application scenarios.

[0025] In the description of the following embodiments, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of this application can be understood according to specific circumstances.

[0026] In the embodiments of the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0027] The present application is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0028] See also Figure 1-Figure 6 A check valve assembly structure provided by an embodiment of the utility model includes a valve housing 1, a valve plate 2 and a spring member. The valve housing 1 is tubular and has an inlet 11 and an outlet 12 at the front and rear ends respectively. The upper side of the valve plate 2 is rotatably connected to the inner wall of the upper part of the valve housing 1 through a transverse axis 21, and the transverse axis 21 is perpendicular to the axial direction of the valve housing 1. A raised sealing strip 4 is provided on the inner wall of the lower part of the valve housing 1. The lower side of the valve plate 2 is located between the sealing strip 4 and the outlet 12. One end of the spring member is connected to the valve housing 1 and the other end acts on the valve plate 2. The spring member is used to push the valve plate 2 to rotate around the transverse axis 21 and the thrust direction is such that the lower side of the valve plate 2 turns from the outlet 12 to the inlet 11. When the lower side of the valve plate 2 abuts against the sealing strip 4, the valve plate 2 blocks the inlet 11 and the outlet 12, and there is a gap between the position where the sealing strip 4 abuts the valve plate 2 and the inner wall of the lower part of the valve housing 1.

[0029] The above scheme provides a raised sealing strip 4 on the inner wall of the lower part of the valve housing 1. When exhausting, oil smoke enters from the inlet 11 of the valve housing 1 and pushes the lower side of the valve plate 2 to rotate toward the outlet 12. At this time, the valve plate 2 is in an open state, and the inlet 11 and outlet 12 of the valve housing 1 are connected to achieve normal exhaust. After the exhaust is completed, the spring member pushes the valve plate 2 to rotate the lower side of the valve plate 2 toward the inlet 11 until the lower side of the valve plate 2 abuts against the sealing strip 4. At this time, the inlet 11 and outlet 12 of the valve housing 1 are blocked to prevent the oil smoke from the outlet 12 of the valve housing 1 from flowing back. Since there is a gap between the position where the sealing strip 4 abuts the valve plate 2 and the inner wall of the lower part of the valve housing 1, it can significantly improve the poor exhaust caused by the adhesion of oil and dirt between the valve plate and the valve housing 1, and the single valve plate is conducive to reducing the volume of the valve housing 1, making installation more convenient.

[0030] In order to explain this embodiment more clearly, Figure 2 The axial direction of the valve housing 1 refers to the front-to-back direction, the inlet 11 of the valve housing 1 is located at the front side, the outlet 12 of the valve housing 1 is located at the rear side, and the horizontal axis 21 is arranged on the inner wall of the upper part of the valve body along the left-right direction.

[0031] As an optimization of this embodiment, the sealing strip 4 is closer to the outlet 12 relative to the horizontal axis 21, so that when the lower side of the valve plate 2 abuts against the sealing strip 4, the lower side of the valve plate 2 is inclined toward the outlet 12, and an oil receiving plate 6 is provided on the side of the inner wall of the lower part of the valve housing 1 close to the outlet 12. The valve plate 2 inclined toward the outlet 12 is conducive to the discharge of oil to the side of the outlet 12 of the valve housing 1 and accumulation in the oil receiving plate 6, thereby reducing the accumulation of oil on the side of the valve plate 2 close to the inlet 11.

[0032] Furthermore, the thickness of the sealing strip 4 gradually decreases in the direction approaching the outlet 12 , so that the cross-sectional shape of the sealing strip 4 is triangular or arc-shaped, thereby reducing the contact area between the valve plate 2 and the sealing strip 4 while ensuring the sealing performance of the two.

[0033] In this embodiment, the inner wall of the upper part of the valve housing 1 is provided with a fixed shaft 31 parallel to the horizontal axis 21, the spring member is a torsion spring 3 and is sleeved on the fixed shaft 31, one end of the torsion spring 3 is connected to the inner wall of the upper part of the valve housing 1, and the other end of the torsion spring 3 is connected to the side of the valve plate 2 facing the outlet 12, so that the valve plate 2 is pushed by the torsion spring 3.

[0034] More specifically, a fixing seat 5 is provided on the left and right sides of the inner wall of the upper part of the valve housing 1, and a first clamping groove 52 is provided on the side of the fixing seat 5 facing the outlet 12. Both ends of the fixing shaft 31 are respectively clamped to the first clamping grooves 52 of the two fixing seats 5, and each fixing seat 5 is detachably connected with a fixing block 51, and the fixing block 51 is used to close the first clamping groove 52, so as to facilitate the assembly of the fixing shaft 31. The detachable connection of the fixing block 51 relative to the fixing seat 5 can be a form in the prior art, for example, the fixing seat 5 is provided with a screw hole, and the fixing block 51 is provided with a screw screwed to the screw hole.

[0035] Furthermore, a second card slot 53 is provided on the side of the fixed seat 5 facing the outlet 12. The second card slot 53 is located below the first card slot 52 and the two are arranged side by side. The two ends of the horizontal axis 21 are respectively connected to the second card slots 53 of the two fixed seats 5. The fixing block 51 is used to simultaneously close the first card slot 52 and the second card slot 53 of the fixed seat 5, thereby facilitating the assembly of the horizontal axis 21.

[0036] In this embodiment, there are two torsion springs 3 which are sleeved on the left and right parts of the fixed shaft 31 at an interval, so as to achieve a more stable pushing effect on the valve plate 2 .

[0037] In order to ensure that the torsion spring 3 will not be displaced, a first limiting groove 13 is provided on the inner wall of the upper part of the valve housing 1 corresponding to the position of the torsion spring 3, and a second limiting groove 22 is provided on the valve plate 2 corresponding to the position of the torsion spring 3. One end of the torsion spring 3 is clamped to the first limiting groove 13 and the other end is clamped to the second limiting groove 22, thereby making the structure more stable.

[0038] It should be understood that in other embodiments, the spring member may also be a tension spring, one end of which is connected to the inner wall of the upper part of the valve housing 1 near the inlet 11, and the other end is connected to the side of the valve plate 2 facing the inlet 11; or the elastic member may also be a compression spring, one end of which is connected to the side of the upper part of the valve housing 1 near the outlet 12, and the other end is connected to the side of the valve plate 2 facing the outlet 12, both of which can achieve the pushing of the valve plate 2.

[0039] In this embodiment, the radial cross-section of the valve housing 1 is an oblate shape with a large width and a small height, and the shape of the valve plate 2 is adapted to the radial cross-section shape of the valve housing 1, so that while ensuring the smoke passing area, the height of the valve plate is correspondingly reduced, thereby reducing the influence of gravity on the rotation of the valve plate 2.

[0040] As an extension of this embodiment, a mounting seat 7 is further included, and the valve housing 1 is fixedly connected to the mounting seat 7 through a fastener 71. The mounting seat 7 can be pre-assembled to the corresponding position of the flue, and after the mounting seat 7 is assembled, the valve housing 1 is connected to the mounting seat 7 through the fastener 71, thereby effectively reducing the difficulty of assembly. The fastener 71 is preferably a bolt, and of course it can also be other common forms in the prior art.

[0041] It should be noted that, in the description of the present application, the terms "inside", "outside", etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. This is merely for the convenience of description and does not indicate or imply that the device or component must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present application. All directional indications (such as up, down, left, right, front, back, inside, and outside) are only used to explain the relative positional relationship, movement, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0042] In the description of the present application, the description with reference to the terms "one embodiment", "some embodiments", "in the present embodiment", "specific example", or "some examples" etc. means that the specific features, mechanisms, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, mechanisms, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0043] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A check valve assembly structure, characterized in that: The invention comprises a valve housing (1), a valve plate (2) and a spring member, wherein the valve housing (1) is tubular and has an inlet (11) and an outlet (12) at the front and rear ends respectively, the upper side of the valve plate (2) is rotatably connected to the inner wall of the upper part of the valve housing (1) via a transverse axis (21), and the transverse axis (21) is perpendicular to the axial direction of the valve housing (1), the inner wall of the lower part of the valve housing (1) is provided with a raised sealing strip (4), the lower side of the valve plate (2) is located between the sealing strip (4) and the outlet (12), and the spring member is provided with a plurality of sealing strips (4) on the inner wall of the lower part of the valve housing (1), and the lower side of the valve plate (2) is located between the sealing strip (4) and the outlet (12). One end is connected to the valve housing (1) and the other end acts on the valve plate (2). The spring member is used to push the valve plate (2) to rotate around the transverse axis (21) and the thrust direction is such that the lower side of the valve plate (2) turns from the outlet (12) to the inlet (11). When the lower side of the valve plate (2) abuts against the sealing strip (4), the valve plate (2) blocks the inlet (11) and the outlet (12), and there is a gap between the position of the sealing strip (4) where the valve plate (2) abuts and the inner wall of the lower part of the valve housing (1).

2. A check valve assembly structure according to claim 1, characterized in that: The sealing strip (4) is closer to the outlet (12) relative to the transverse axis (21), so that when the lower side of the valve plate (2) abuts against the sealing strip (4), the lower side of the valve plate (2) is inclined toward the outlet (12), and an oil receiving plate (6) is provided on the inner wall of the lower part of the valve housing (1) near the outlet (12).

3. A check valve assembly structure according to claim 2, characterized in that: The thickness of the sealing strip (4) gradually decreases in a direction approaching the outlet (12), so that the cross-sectional shape of the sealing strip (4) is triangular or arc-shaped.

4. A check valve assembly structure according to claim 1, characterized in that: The inner wall of the upper part of the valve housing (1) is provided with a fixed shaft (31) parallel to the transverse axis (21); the spring member is a torsion spring (3) and is sleeved on the fixed shaft (31); one end of the spring member is connected to the valve housing (1) and the other end is connected to the valve plate (2).

5. A check valve assembly structure according to claim 4, characterized in that: Fixed seats (5) are respectively provided on both sides of the inner wall of the upper part of the valve housing (1), and the fixed seats (5) are provided with first slots (52). The two ends of the fixed shaft (31) are respectively snap-connected to the first slots (52) of the two fixed seats (5), and each fixed seat (5) is detachably connected to a fixed block (51), and the fixed block (51) is used to close the first slot (52).

6. A check valve assembly structure according to claim 5, characterized in that: The fixing seat (5) is also provided with a second card slot (53), the second card slot (53) is arranged side by side with the first card slot (52), the two ends of the transverse axis (21) are respectively connected to the second card slots (53) of the two fixing seats (5), and the fixing block (51) is used to simultaneously close the first card slot (52) and the second card slot (53) of the fixing seat (5).

7. A check valve assembly structure according to claim 4, characterized in that: The torsion springs (3) are two and are sleeved on the fixed shaft (31) at an interval.

8. A check valve assembly structure according to claim 4 or 7, characterized in that: A first limiting groove (13) is provided on the inner wall of the upper part of the valve housing (1) at a position corresponding to the torsion spring (3); a second limiting groove (22) is provided on the valve plate (2) at a position corresponding to the torsion spring (3); one end of the torsion spring (3) is clamped to the first limiting groove (13) and the other end is clamped to the second limiting groove (22).

9. A check valve assembly structure according to claim 1, characterized in that: The radial cross section of the valve housing (1) is in the shape of an oblate circle with a large width and a small height, and the shape of the valve plate (2) is adapted to the radial cross section shape of the valve housing (1).

10. A check valve assembly structure according to claim 1, characterized in that: It also comprises a mounting seat (7), and the valve housing (1) is fixedly connected to the mounting seat (7) via a fastener (71).

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