Gravity air valve

Abstract

The utility model provides a gravity air valve which comprises an air valve cover, a rotating shaft is fixedly arranged on the side edge of the air valve cover, the two ends of the rotating shaft are movably connected with air valve cover supports, and the air valve cover supports are fixedly arranged on a frame body. And an angle limiting assembly for limiting the opening angle of the air valve cover is fixedly arranged on the air valve cover support. According to the gravity air valve, the opening degree of the air valve cover can be limited through the magnetic unit, the air valve cover is limited to fall back in the exhaust process, repeated opening and closing when the air pressure is unstable are avoided, the exhaust efficiency can be improved, and the fan resistance can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of air valves, in particular to a gravity air valve. Background Art

[0002] Air valve is a common air volume regulating valve in production and life. It is usually an indispensable terminal accessory of central air conditioning or exhaust vent in ventilation, air conditioning and air purification projects of industrial plants and civil buildings. It is generally used in air conditioning and ventilation system pipes to adjust the air volume of branch pipes. It can also prevent foreign matter from entering the pipe when the air is not exhausted.

[0003] When the wind pressure is unstable, the existing air valve is prone to repeated opening and closing and the air valve opening size changes. Repeated opening and closing will damage the air valve and reduce the service life of the shaft. When the wind is weak, the air valve opening is reduced, and the fan resistance will still be large, which will lead to high fan power consumption.

[0004] In addition, a certain pressure must be reached to open the air valve cover. The cover can only be opened when the gravity of the air valve cover is overcome. The requirements for opening the cover are relatively high, which seriously affects the exhaust demand. Utility Model Content

[0005] The utility model aims to overcome the deficiencies of the prior art and provide a gravity air valve to solve the problems in the prior art that the air valve is difficult to open, repeatedly opens and closes when the air pressure is unstable, and the air valve opening is reduced when the air pressure is low.

[0006] The utility model provides a gravity air valve, which comprises: an air valve cover, a rotating shaft is fixedly arranged on the side of the air valve cover, both ends of the rotating shaft are movably connected to the air valve cover support, and the air valve cover support is fixedly arranged on the frame;

[0007] An angle limiting component for limiting the opening angle of the air valve cover is fixedly arranged on the air valve cover support.

[0008] Furthermore, the air valve cover is a cover with an arc surface structure.

[0009] Furthermore, the circumference of the air valve cover has a first sealing edge extending in the radial direction; and the frame body has a second sealing edge corresponding to the first sealing edge.

[0010] Furthermore, the air valve cover is fixedly connected to the rotating shaft via a rotating shaft bracket.

[0011] Furthermore, a sealing gasket is provided on the first sealing edge and / or the second sealing edge.

[0012] In an embodiment of the present utility model, the angle limiting component is a limiting bracket, and both ends of the limiting bracket are fixedly arranged on the air valve cover support, and the angle of the air valve cover is limited by the bracket body of the limiting bracket.

[0013] In an embodiment of the present utility model, the angle limiting component includes a magnet holder and a magnetic unit fixed on the top of the magnet holder, and the lower end of the magnet holder is fixedly arranged on the air valve cover support; an adsorption sheet is arranged on the air valve cover corresponding to the magnetic unit.

[0014] Further, a flexible protective sleeve is sleeved outside the magnetic unit.

[0015] In an embodiment of the present utility model, an opening is arranged at the top of the air valve cover, a cover plate is arranged at the opening position, and the cover plate is rotatably arranged on the top of the air valve cover through a connecting seat assembly.

[0016] Further, the connecting seat assembly includes a connecting seat and a connecting frame. Among them, the connecting seat is fixed on the top of the air valve cover, and the cover plate is rotatably connected to the connecting seat through the connecting frame; the opening direction of the cover plate is the same as the opening direction of the air valve cover.

[0017] According to the above embodiments, the gravity air valve provided by the present utility model has at least the following benefits: the gravity air valve can limit the opening degree of the air valve cover through the magnetic unit, and limit the fall of the air valve cover during the exhaust process, avoiding repeated opening and closing when the air pressure is unstable, and can improve the exhaust efficiency and reduce the resistance of the fan.

[0018] In addition, a rotatable cover plate is arranged on the air valve cover, and the cover plate can first rotate and open when receiving wind pressure, so that the overall center of gravity of the air valve cover moves backward, making the air valve cover easier to open.

[0019] It should be understood that the above general description and the following specific embodiments are only exemplary and explanatory, and cannot limit the scope claimed by the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The following drawings are part of the specification of the present utility model, which illustrate the exemplary embodiments of the present utility model, and the attached drawings are used together with the description of the specification to explain the principle of the present utility model.

[0021] Figure 1 It is a structural diagram of the first embodiment of a gravity air valve provided by the present utility model.

[0022] Figure 2 It is a diagram of the open state of the air valve cover of the first embodiment of a gravity air valve provided by the present utility model.

[0023] Figure 3An exploded view of Embodiment 1 of a gravity damper provided by the present utility model.

[0024] Figure 4 A cross-sectional view of Embodiment 1 of a gravity damper provided by the present utility model.

[0025] Figure 5 A top view of Embodiment 2 of a gravity damper provided by the present utility model

[0026] Figure 6 An exploded view of Embodiment 2 of a gravity damper provided by the present utility model.

[0027] Figure 7 A view of the damper cover in the open state of Embodiment 3 of a gravity damper provided by the present utility model.

[0028] Figure 8 A structural diagram of Embodiment 3 of a gravity damper provided by the present utility model.

[0029] Figure 9 A structural diagram of Embodiment 4 of a gravity damper provided by the present utility model.

[0030] Figure 10 A structural diagram of Embodiment 5 of a gravity damper provided by the present utility model.

[0031] Figure 11 A view of the damper cover in the open state of Embodiment 5 of a gravity damper provided by the present utility model.

[0032] Figure 12 A structural diagram of Embodiment 6 of a gravity damper provided by the present utility model.

[0033] Figure 13 A structural diagram of Embodiment 7 of a gravity damper provided by the present utility model.

[0034] Figure 14 A view of the damper cover in the open state of Embodiment 7 of a gravity damper provided by the present utility model.

[0035] Figure 15 A structural diagram of Embodiment 8 of a gravity damper provided by the present utility model.

[0036] Figure 16 A view of the damper cover in the open state of Embodiment 8 of a gravity damper provided by the present utility model.

[0037] Figure 17 A structural diagram of Embodiment 9 of a gravity damper provided by the present utility model.

[0038] Figure 18 A structural diagram of Embodiment 10 of a gravity damper provided by the present utility model.

[0039] Figure 19 The structure of the eleventh embodiment of a gravity air valve provided by the present utility model.

[0040] Figure 20 The open state diagram of the air valve cover of the eleventh embodiment of a gravity air valve provided by the present utility model.

[0041] Figure 21 The open state diagram of the air valve cover of the twelfth embodiment of a gravity air valve provided by the present utility model.

[0042] Figure 22 The structure diagram of the thirteenth embodiment of a gravity air valve provided by the present utility model.

[0043] Figure 23 The open state diagram of the air valve cover of the thirteenth embodiment of a gravity air valve provided by the present utility model.

[0044] Figure 24 The open state diagram of the air valve cover of the fourteenth embodiment of a gravity air valve provided by the present utility model.

[0045] Explanation of reference numerals:

[0046] 1 - air valve cover, 2 - rotating shaft, 3 - air valve cover support, 4 - frame body, 5 - angle limiting component, 6 - rotating shaft bracket, 7 - cover plate, 8 - connecting seat assembly;

[0047] 11 - first sealing edge;

[0048] 41 - second sealing edge;

[0049] 51 - limiting bracket, 52 - magnet bracket, 53 - magnetic unit, 54 - adsorption sheet, 55 - flexible protective sleeve;

[0050] 81 - connecting seat, 82 - connecting frame. Detailed implementation manners

[0051] Now, various exemplary implementation manners of the present utility model will be described in detail. This detailed description should not be considered as a limitation of the present utility model, but rather as a more detailed description of certain aspects, characteristics, and implementation schemes of the present utility model.

[0052] Without departing from the scope or spirit of the present utility model, various improvements and changes can be made to the specific implementation manners of the specification of the present utility model, which are obvious to those skilled in the art. Other implementation manners obtained from the specification of the present utility model are obvious to those skilled in the art. The specification and embodiments of this application are only exemplary.

[0053] The present utility model provides a gravity air valve, as Figures 1-4The figure shows a schematic structural diagram of the first embodiment of the gravity air valve. In the specific implementation manner, the air valve includes: an air valve cover 1, a rotating shaft 2 is fixedly arranged on the side of the air valve cover 1, both ends of the rotating shaft 2 are movably connected to an air valve cover support 3 and are connected to bearings arranged on the air valve cover support 3, so that the air valve cover 1 can rotate relative to the air valve cover support 3. The air valve cover support 3 is fixedly arranged on a frame body 4. In this embodiment, the frame body 4 is of an annular frame structure and is used to connect the air valve cover 1 and the air outlet.

[0054] In addition, an angle limiting component 5 for limiting the opening angle of the air valve cover 1 is fixedly arranged on the air valve cover support 3 and is used to limit the maximum opening angle of the air valve cover 1. In this embodiment, the air outlet of the air valve faces upward, and the frame body 4 is vertically arranged. In order to ensure that the air valve cover 1 can fall back autonomously, the center of gravity of the air valve cover 1 is biased towards the air outlet direction, and its maximum opening angle is less than 90°.

[0055] Furthermore, the air valve cover 1 is a cover with an arc surface structure. When the air valve is used for a negative pressure fan, the arc-shaped cover can withstand negative pressure and avoid being sucked and deformed. In this embodiment, the arc surface of the air valve cover protrudes outward to improve the front compressive resistance of the air valve cover 1. In addition, the arc-shaped cover can increase the flow time and distance of the air flow on the cover surface, improve the effect of the air flow on the air valve cover 1, and make the air valve cover easier to open compared with a flat cover plate.

[0056] In addition, the surface of the arc surface of the air valve cover 1 has reinforcing ribs to increase the structural strength of the air valve cover and improve the ability to resist negative pressure.

[0057] Furthermore, the circumference of the air valve cover 1 has a first sealing edge 11 extending radially. The frame body 4 has a second sealing edge 41 corresponding to the first sealing edge 11. Both sealing edges are smooth planes, and after being fitted, a sealing effect can be achieved, and the air leakage situation can be reduced.

[0058] Furthermore, in order to improve the sealing effect, a sealing gasket can be arranged on the first sealing edge 11 and / or the second sealing edge 41. The sealing gasket can be a flexible gasket, which can improve the sealing effect on the one hand and reduce the noise when the air valve cover is closed on the other hand.

[0059] In the specific implementation manner of this embodiment, the air valve cover 1 is fixedly connected to the rotating shaft 2 through a rotating shaft bracket 6. The rotating shaft bracket 6 is fixed on the first sealing edge 101 of the air valve cover 1, and the rotating shaft is fixed on the rotating shaft bracket 6.

[0060] In the specific implementation of this embodiment, the angle limiting component 5 includes a magnet holder 52 and a magnetic unit 53 fixed on the top of the magnet holder 52. Among them, the magnetic unit 53 is arranged on one side of the magnet holder 52 corresponding to the air valve cover 1. The lower end of the magnet holder 52 is fixedly arranged on the air valve cover support 3. In this embodiment, the magnetic unit 53 is a permanent magnet, and the magnetic force of the permanent magnet can be changed by magnetization.

[0061] In addition, an adsorption sheet 54 is arranged on the air valve cover 1 corresponding to the magnetic unit 53. Specifically, the adsorption sheet 54 is made of steel and can be adsorbed by the magnet. In this embodiment, the adsorption sheet 54 is arranged on the rotating shaft bracket 6.

[0062] In this embodiment, the suction force of the magnetic unit 53 on the adsorption sheet 54 is less than the gravity of the air valve cover at this angle. Therefore, the adsorption force of the magnetic unit 53 on the adsorption sheet 54 is the torque to assist the opening of the air valve cover. When the air pressure is relatively high, the air valve cover opens, and the magnetic unit 53 adsorbs the adsorption sheet 54 at the maximum opening angle. When the air pressure decreases, the air valve cover 1 does not immediately reduce the opening size. Instead, when the air pressure decreases to a certain extent, that is, when the sum of the adsorption force and the thrust of the air flow on the air valve cover is less than the downward gravity of the air valve cover, the magnetic unit 53 will separate from the adsorption sheet 54, and then the air valve cover 1 will rotate downward and fall back to close the air outlet.

[0063] Furthermore, a flexible protective sleeve 55 is sleeved outside the magnetic unit 53 to protect the magnetic unit 53 from being damaged due to friction and other situations during long-term use.

[0064] As Figure 5 and Figure 6 shown is a schematic structural diagram of the second embodiment of a gravity air valve provided by the present utility model. The difference between this embodiment and the Figures 1-4 shown embodiment is that in this embodiment, the angle limiting component 5 includes a magnet holder 52 and a magnetic unit 53 fixed on the top of the magnet holder 52. Among them, the magnetic unit 53 is arranged on one side of the magnet holder 52 corresponding to the air valve cover 1. The lower end of the magnet holder 52 is fixedly arranged on the air valve cover support 3. In this embodiment, the magnetic unit 53 is an electromagnet, and the magnetic force of the magnet can be changed by energization control.

[0065] As Figures 7-8 shown is a schematic structural diagram of the third embodiment of a gravity air valve provided by the present utility model. The difference between this embodiment and the Figures 1-4 shown embodiment is that in this embodiment, the air valve cover 1 is a cover with an arc surface structure, and the arc surface of the air valve cover is concave inward towards the air outlet of the frame body 4.

[0066] As Figure 9 shown is a schematic structural diagram of the fourth embodiment of a gravity air valve provided by the present utility model. The difference between this embodiment and theFigures 1-4 The difference between the illustrated embodiment and this embodiment is that in this embodiment, the angle limiting component 5 is a limiting bracket 51. Both ends of the limiting bracket 51 are fixedly arranged on the air valve cover support 3, and the angle of the air valve cover 1 is limited by the main body rod of the limiting bracket 51. Additionally, the main body rod in the middle of the limiting bracket 51 is an arc-shaped rod, which is used to match the arc-shaped surface of the air valve cover 1. When the air valve cover 1 reaches its maximum opening angle, the arc-shaped rod can lift the air valve cover 1.

[0067] As Figures 10-11 Shown is a schematic structural diagram of the fifth embodiment of a gravity air valve provided by the present utility model. The difference between this embodiment and Figure 9 the illustrated embodiment is that in this embodiment, an opening is provided at the top of the air valve cover 1, and a cover plate 7 is arranged at the opening position. The cover plate 7 is rotatably arranged on the top of the air valve cover 1 through a connecting seat assembly 8.

[0068] Furthermore, the connecting seat assembly 8 includes a connecting seat 81 and a connecting frame 82. Among them, the connecting seat 81 is fixed on the top of the air valve cover 1, the cover plate 7 is rotatably connected to the connecting seat 81 through the connecting frame 82, and the connecting frame 82 is fixed at the edge position of the cover plate 7.

[0069] In addition, the opening direction of the cover plate 7 is the same as that of the air valve cover 1.

[0070] When the air pressure rises and exhaust is required, the cover plate 7 will first flip open under the wind pressure. During the opening process of the cover plate 7 and after it is opened, the overall center of gravity of the air valve cover 1 moves towards the rotating shaft direction, playing a role in adjusting the center of gravity and making it easier to open the air valve cover 1. That is, during the opening process of the cover plate 7 and after it is opened, a pulling force along the rotating direction will be exerted on the air valve cover 1, making it easier to open the air valve cover 1.

[0071] In this embodiment, the direction indicated by the arrow is the air flow direction.

[0072] As Figure 12 Shown is a schematic structural diagram of the sixth embodiment of a gravity air valve provided by the present utility model. The difference between this embodiment and Figures 1-4 the illustrated embodiment is that in this embodiment, an opening is provided at the top of the air valve cover 1, and a cover plate 7 is arranged at the opening position. The cover plate 7 is rotatably arranged on the top of the air valve cover 1 through a connecting seat assembly 8.

[0073] Furthermore, the connecting seat assembly 8 includes a connecting seat 81 and a connecting frame 82. Among them, the connecting seat 81 is fixed on the top of the air valve cover 1, the cover plate 7 is rotatably connected to the connecting seat 81 through the connecting frame 82, and the connecting frame 82 is fixed at the edge position of the cover plate 7.

[0074] In addition, the opening direction of the cover plate 7 is the same as that of the air valve cover 1.

[0075] When the air pressure increases and exhaust is required, the cover plate 7 will first flip open under the wind pressure. During the opening process of the cover plate 7 and after it is opened, the overall center of gravity of the air valve cover 1 moves towards the rotating shaft direction, playing a role in adjusting the center of gravity and making it easier to open the air valve cover 1. That is, during the opening process of the cover plate 7 and after it is opened, a pulling force along the rotation direction will be exerted on the air valve cover 1, making it easier to open the air valve cover 1.

[0076] As Figures 13-14 shown is a schematic structural diagram of the seventh embodiment of a gravity air valve provided by the present utility model. The difference between this embodiment and Figures 1-4 the embodiment shown is that in this embodiment, the frame body 4 is the outer frame of the negative pressure fan, so that the air valve cover 1 can directly cover the air outlet of the negative pressure fan. This design can reduce the connecting parts between the air valve and the fan, and reduce the production and use costs. In addition, the negative pressure fan is a vertically arranged fan, and both the air inlet and the air outlet of the fan outer frame are in the vertical direction.

[0077] As Figures 15-16 shown is a schematic structural diagram of the eighth embodiment of a gravity air valve provided by the present utility model. The difference between this embodiment and Figures 13-14 the embodiment shown is that in this embodiment, the angle limiting component 5 includes a magnet frame 52 and a magnetic unit 53 fixed on the top of the magnet frame 52. Among them, the magnetic unit 53 is arranged on one side of the magnet frame 52 corresponding to the air valve cover 1. The lower end of the magnet frame 52 is fixedly arranged on the air valve cover support 3. In this embodiment, the magnetic unit 53 is an electromagnet, and the magnetic force of the magnet can be changed by means of electric control.

[0078] In addition, an opening is provided at the top of the air valve cover 1, and a cover plate 7 is arranged at the opening position. The cover plate 7 is rotatably arranged on the top of the air valve cover 1 through a connecting seat assembly 8.

[0079] Furthermore, the connecting seat assembly 8 includes a connecting seat 81 and a connecting frame 82. Among them, the connecting seat 81 is fixed on the top of the air valve cover 1, the cover plate 7 is rotatably connected to the connecting seat 81 through the connecting frame 82, and the connecting frame 82 is fixed at the edge position of the cover plate 7.

[0080] In addition, the opening direction of the cover plate 7 is the same as the opening direction of the air valve cover 1.

[0081] When the air pressure increases and exhaust is required, the cover plate 7 will first flip open under the wind pressure. During the opening process of the cover plate 7 and after it is opened, the overall center of gravity of the air valve cover 1 moves towards the rotating shaft direction, playing a role in adjusting the center of gravity and making it easier to open the air valve cover 1. That is, during the opening process of the cover plate 7 and after it is opened, a pulling force along the rotation direction will be exerted on the air valve cover 1, making it easier to open the air valve cover 1.

[0082] As Figure 17The following is a schematic structural diagram of the ninth embodiment of a gravity air valve provided by the present utility model. The difference between this embodiment and Figures 15-16 the embodiment shown is that, in this embodiment, the angle limiting component 5 is a limiting bracket 51. Both ends of the limiting bracket 51 are fixedly arranged on the air valve cover support 3, and the angle of the air valve cover 1 is limited by the main body rod of the limiting bracket 51. In addition, the middle main body rod of the limiting bracket 51 is an arc rod, which is used to match the arc surface of the air valve cover 1. When the air valve cover 1 reaches the maximum opening angle, the arc rod can lift the air valve cover 1.

[0083] As Figure 18 The following is a schematic structural diagram of the tenth embodiment of a gravity air valve provided by the present utility model. The difference between this embodiment and Figures 13-14 the embodiment shown is that, in this embodiment, the air valve cover 1 is a cover with an arc surface structure, and the arc surface of the air valve cover is concave inward towards the air outlet of the frame body 4.

[0084] As Figures 19-20 The following is a schematic structural diagram of the eleventh embodiment of a gravity air valve provided by the present utility model. The difference between this embodiment and Figures 13-14 the embodiment shown is that, in this embodiment, the frame body 4 is the outer frame of a negative pressure fan, and the negative pressure fan is a horizontally arranged fan. Both the air inlet and the air outlet of the fan outer frame are in the horizontal direction.

[0085] In addition, in this embodiment, the opening direction of the air valve cover 1 is upward, and its maximum opening angle can be greater than 90°.

[0086] As Figure 21 The following is a schematic structural diagram of the twelfth embodiment of a gravity air valve provided by the present utility model. The difference between this embodiment and Figures 19-20 the embodiment shown is that, in this embodiment, the angle limiting component 5 includes a magnet bracket 52 and a magnetic unit 53 fixed on the top of the magnet bracket 52. Among them, the magnetic unit 53 is arranged on one side of the magnet bracket 52 corresponding to the air valve cover 1. The lower end of the magnet bracket 52 is fixedly arranged on the air valve cover support 3. In this embodiment, the magnetic unit 53 is an electromagnet, and the magnetic force of the magnet can be changed by means of energization control.

[0087] In the specific implementation manner of this embodiment, an opening is provided at the top of the air valve cover 1, and a cover plate 7 is arranged at the opening position. The cover plate 7 is rotatably arranged on the top of the air valve cover 1 through a connecting seat assembly 8.

[0088] Furthermore, the connecting seat assembly 8 includes a connecting seat 81 and a connecting frame 82. Among them, the connecting seat 81 is fixed on the top of the air valve cover 1, and the cover plate 7 is rotatably connected to the connecting seat 81 through the connecting frame 82, and the connecting frame 82 is fixed at the edge position of the cover plate 7.

[0089] In addition, the opening direction of the cover plate 7 is the same as that of the air valve cover 1.

[0090] When the air pressure rises and exhaust is required, the cover plate 7 will first flip open under the wind pressure. During the opening process of the cover plate 7 and after it is opened, the overall center of gravity of the air valve cover 1 moves towards the rotating shaft direction, playing a role in adjusting the center of gravity and making it easier to open the air valve cover 1. That is, during the opening process of the cover plate 7 and after it is opened, a pulling force along the rotation direction will be exerted on the air valve cover 1, making it easier to open the air valve cover 1.

[0091] Such as Figures 22-23 shown is a schematic structural diagram of a trial order of an embodiment of a gravity air valve provided by the present utility model. The difference between this embodiment and the Figures 1-4 shown embodiment is that in this embodiment, the frame body 4 is a vertically arranged frame structure, and the lower part of the frame body 4 is wider and the upper part is narrower, thereby changing the air flow direction. That is, the directions of the air inlet and the air outlet are different. The air inlet is in the horizontal direction, and the air outlet is in the inclined upward direction.

[0092] In addition, in this embodiment, the opening direction of the air valve cover 1 is upward, and its maximum opening angle can be greater than 90°.

[0093] Such as Figure 24 shown is a schematic structural diagram of an embodiment fourteen of a gravity air valve provided by the present utility model. The difference between this embodiment and the Figures 22-23 shown embodiment is that in this embodiment, the angle limiting component 5 includes a magnet holder 52 and a magnetic unit 53 fixed on the top of the magnet holder 52. Among them, the magnetic unit 53 is arranged on one side of the magnet holder 52 corresponding to the air valve cover 1. The lower end of the magnet holder 52 is fixedly arranged on the air valve cover support 3. In this embodiment, the magnetic unit 53 is an electromagnet, and the magnetic force of the magnet can be changed by means of energization control.

[0094] In the specific implementation manner of this embodiment, an opening is provided at the top of the air valve cover 1, and a cover plate 7 is arranged at the opening position. The cover plate 7 is rotatably arranged on the top of the air valve cover 1 through a connecting seat assembly 8.

[0095] Furthermore, the connecting seat assembly 8 includes a connecting seat 81 and a connecting frame 82. Among them, the connecting seat 81 is fixed on the top of the air valve cover 1, the cover plate 7 is rotatably connected to the connecting seat 81 through the connecting frame 82, and the connecting frame 82 is fixed at the edge position of the cover plate 7.

[0096] In addition, the opening direction of the cover plate 7 is the same as that of the air valve cover 1.

[0097] When the air pressure is increased and exhaust is required, the cover plate 7 will first flip open under the wind pressure. During the opening process of the cover plate 7 and after it is opened, the overall center of gravity of the air valve cover 1 moves towards the axis of rotation, playing a role in adjusting the center of gravity and making it easier to open the air valve cover 1. That is, during the opening process of the cover plate 7 and after it is opened, a pulling force along the rotation direction will act on the air valve cover 1, making it easier to open the air valve cover 1.

[0098] The above are only illustrative specific embodiments of the present invention. Without departing from the concept and principles of the present invention, any equivalent changes and modifications made by any person skilled in the art shall fall within the scope of protection of the present invention.

Claims

1. A gravity air valve, characterized in that, The air valve includes: an air valve cover (1), a rotating shaft (2) is fixedly arranged on the side of the air valve cover (1), both ends of the rotating shaft (2) are movably connected to an air valve cover support (3), and the air valve cover support (3) is fixedly arranged on a frame body (4); An angle limiting component (5) for limiting the opening angle of the air valve cover (1) is fixedly arranged on the air valve cover support (3).

2. The gravity air valve according to claim 1, wherein, The air valve cover (1) is a cover with an arc surface structure.

3. The gravity air valve according to claim 2, wherein The circumference of the air valve cover (1) has a first sealing edge (11) extending radially; The frame body (4) has a second sealing edge (41) corresponding to the first sealing edge (11).

4. The gravity air valve according to claim 3, characterized in that, The air valve cover (1) is fixedly connected to the rotating shaft (2) through a rotating shaft bracket (6).

5. The gravity air valve according to claim 3, characterized in that, A sealing gasket is arranged on the first sealing edge (11) and / or the second sealing edge (41).

6. The gravity air valve according to claim 1, wherein The angle limiting component (5) is a limiting bracket (51), both ends of the limiting bracket (51) are fixedly arranged on the air valve cover support (3), and the angle of the air valve cover (1) is limited by the bracket body of the limiting bracket (51).

7. The gravity air valve according to claim 1, wherein, The angle limiting component (5) includes a magnet bracket (52) and a magnetic unit (53) fixed on the top of the magnet bracket (52), and the lower end of the magnet bracket (52) is fixedly arranged on the air valve cover support (3); An adsorption sheet (54) is arranged on the air valve cover (1) corresponding to the magnetic unit (53).

8. The gravity air valve according to claim 7, wherein, A flexible protective sleeve (55) is sleeved outside the magnetic unit (53).

9. The gravity air valve according to any one of claims 1-8, characterized in that, An opening is arranged at the top of the air valve cover (1), a cover plate (7) is arranged at the opening position, and the cover plate (7) is rotatably arranged on the top of the air valve cover (1) through a connecting seat assembly (8).

10. The gravity air valve according to claim 9, characterized in that, The connecting seat assembly (8) includes a connecting seat (81) and a connecting frame (82), wherein, The connecting seat (81) is fixed on the top of the air valve cover (1), and the cover plate (7) is rotatably connected to the connecting seat (81) through the connecting frame (82); The opening direction of the cover plate (7) is the same as the opening direction of the air valve cover (1).

Images