Trace exhaust valve capable of adjusting sealing performance of exhaust hole on line

Abstract

The utility model discloses a trace exhaust valve capable of adjusting the sealing performance of an exhaust hole on line, and belongs to the technical field of valves. The check valve comprises a valve body, a valve cover is arranged on the valve body, a valve cavity is formed in the valve body, a valve seat is arranged on the valve cover, and an exhaust hole is formed in the valve seat. A floating ball is arranged in the valve cavity and connected with a micro-discharging valve clack through a connecting rod mechanism, and the micro-discharging valve clack closes or opens an exhaust hole. A first adjusting assembly is arranged in the valve cavity and used for adjusting the distance between the micro-discharge valve clack and the exhaust hole. A second adjusting assembly is arranged on the valve seat and used for adjusting the distance between the exhaust hole and the micro-exhaust valve clack. The first adjusting assembly and the second adjusting assembly are respectively arranged below the micro-discharge valve clack and on the valve seat. The first adjusting assembly is used for adjusting the height of the micro-discharge valve clack, the second adjusting assembly can be used for adjusting the height of the valve seat online in real time, and therefore the distance between the exhaust hole and the micro-discharge valve clack is adjusted, the distance between the exhaust hole and the micro-discharge valve clack can be adjusted in real time, and the sealing effect of the micro-discharge valve is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, and more specifically, to a micro exhaust valve for online adjusting the sealing performance of an exhaust hole. Background Technique

[0002] Generally, water contains dissolved air. During the water conveyance process, this air is continuously released from the water and accumulates at the high points of the pipeline, forming an air pocket, which makes water conveyance difficult and reduces the water conveyance capacity of the system. The main function of the micro exhaust valve is to remove the air precipitated from the water. The micro exhaust valve is one of the most commonly used air valves and is an automatic valve for timely removing the gas precipitated from the water in the water supply pipeline to prevent air blockage in the pipeline. It can timely discharge the air precipitated from the water during the operation of the pipeline and prevent the pipeline from being blocked due to gas accumulation. In addition, it is also often used in the secondary water supply pipeline and the fire protection system. It is suitable for installation in high-rise buildings, in-plant pipelines, and small pumping stations to protect or improve the water conveyance efficiency of the system and save energy.

[0003] The sealing pair of the micro exhaust valve is made of rubber and metal. The floating ball drives the swing of the lever as the water level rises and falls, realizing the opening and closing of the exhaust port. Since the swing amplitude of the lever is small, for the previous micro exhaust valves, it is necessary to disassemble the valve cover and then adjust the valve flap so that the valve flap just fits the valve seat (the rubber compression amount is just right) to achieve sealing. However, due to the actual working conditions (different pressures), the compression amount of the rubber will be different, and it is often impossible to adjust it well at one time.

[0004] For example, Chinese patent document CN219975579U discloses a micro exhaust valve, which includes a valve body and a valve cover provided with an exhaust hole. A valve cavity is arranged inside the valve body and the valve cover. The valve body is provided with a water inlet for connecting the valve cavity and the water conveyance pipeline. A floating ball and a valve core are arranged in the valve cavity. A double-link lever mechanism is arranged between the floating ball and the valve core. The floating ball drives the valve core to close or open the exhaust hole through the double-link lever mechanism. An adjusting component for adjusting the distance between the valve core and the exhaust hole is also arranged in the valve cavity. Although this application can adjust the distance between the sealing member and the exhaust hole, it is inconvenient to adjust each time because the valve needs to be disassembled during adjustment. Content of the Utility Model

[0005] 1. Technical Problem to be Solved by the Utility Model

[0006] Aiming at the problem that the existing micro exhaust valve cannot adjust the distance between the exhaust hole and the micro exhaust valve flap in real time, resulting in poor sealing effect, the utility model provides a micro exhaust valve for online adjusting the sealing performance of the exhaust hole, and solves the above problem.

[0007] 2. Technical Solution

[0008] To achieve the above object, the technical solution provided by the utility model is as follows:

[0009] The utility model includes a valve body, a valve cover is arranged on the valve body, a valve cavity is arranged in the valve body, a valve seat is arranged on the valve cover, and an exhaust hole is arranged on the valve seat; a floating ball is arranged in the valve cavity, the floating ball is connected with a micro exhaust valve flap through a connecting rod mechanism, and the micro exhaust valve flap can close or open the exhaust hole; a second adjusting component is arranged on the valve seat for adjusting the distance between the exhaust hole and the micro exhaust valve flap from the outside.

[0010] As a further improvement of the utility model, the second adjusting component includes a second adjusting rod, the second adjusting rod is connected with the valve seat, and the second adjusting rod and the valve seat are movably arranged on the valve cover; a locking piece and / or an adjusting piece are arranged on the second adjusting rod.

[0011] As a further improvement of the utility model, the second adjusting rod and the valve seat are designed separately, the valve seat and the valve cover are in interference fit, the second adjusting rod is connected with the valve seat, and the second adjusting rod is used to push the valve seat towards the micro exhaust valve flap.

[0012] As a further improvement of the utility model, the second adjusting rod and the valve seat are of an integral structure, the second adjusting rod is threadedly connected with the valve cover, and when the second adjusting rod is screwed, the second adjusting rod and the valve seat can be selectively moved towards or away from the micro exhaust valve flap together.

[0013] As a further improvement of the utility model, a threaded structure is arranged on the outer periphery of the second adjusting rod, a second adjusting nut is arranged on the second adjusting rod, the second adjusting nut is threadedly connected with the second adjusting rod, and serves as a locking piece and / or an adjusting piece; the second adjusting nut abuts against the valve cover.

[0014] As a further improvement of the utility model, a first adjusting component is also arranged in the valve cavity for adjusting the distance between the micro exhaust valve flap and the exhaust hole from the inside; the micro exhaust valve flap is connected to the connecting rod mechanism through the first adjusting component.

[0015] As a further improvement of the utility model, a valve flap frame is arranged on the first adjusting component, and the micro exhaust valve flap is coated on the valve flap frame.

[0016] As a further improvement of the utility model, the connecting rod mechanism includes a first connecting rod, a second connecting rod and a third connecting rod, the first connecting rod is connected with the valve cover through a first fixing piece, and the third connecting rod is connected with the valve cover through a second fixing piece; the first connecting rod and the third connecting rod are respectively hinged to the second connecting rod.

[0017] As a further improvement of the present utility model, one end of the first connecting rod is connected to the first fixing member, and the other end is connected to the floating ball. The second connecting rod is connected to the middle of the first connecting rod; one end of the third connecting rod is connected to the second fixing member, and the other end is connected to the second connecting rod; the valve flap holder is arranged on the third connecting rod.

[0018] As a further improvement of the present utility model, a connecting sleeve is arranged on the floating ball. The connecting sleeve is connected to the floating ball connecting piece, and the floating ball is hinged to the first connecting rod through the floating ball connecting piece.

[0019] 3. Beneficial effects

[0020] Adopting the technical solution provided by the present utility model, compared with the existing well-known technology, it has the following remarkable effects:

[0021] (1) A micro-exhaust valve for online adjusting the sealing performance of the exhaust hole provided by the present utility model is provided with a valve seat with a through hole on the valve cover. The valve seat communicates with the outside and the valve cavity for micro-exhaust, and a second adjusting component is arranged on the valve seat. After leaving the factory, when adjustment is required, there is no need to open the exhaust valve. Only the height of the valve seat needs to be adjusted by using the second adjusting component, so as to adjust the distance between the exhaust hole and the micro-exhaust valve flap, and the distance between the exhaust hole and the micro-exhaust valve flap can be adjusted in real time to ensure the sealing effect of the micro-exhaust valve.

[0022] (2) A micro-exhaust valve for online adjusting the sealing performance of the exhaust hole provided by the present utility model is provided with a threaded structure on the adjusting rod in the first adjusting component and the second adjusting component. The adjusting nut is used as a locking part and / or an adjusting part. The adjusting nut can not only be used as a locking part to lock the adjusting rod after adjustment is in place, but also can adjust the up and down position of the adjusting rod by using the threaded structure, which is convenient for fine-tuning the adjusting rod and can prevent the position of the adjusting rod from deviating after adjustment.

[0023] (3) A micro-exhaust valve for online adjusting the sealing performance of the exhaust hole provided by the present utility model uses a connecting rod mechanism to connect the floating ball and the micro-exhaust valve flap. When the floating ball floats, the micro-exhaust valve flap blocks the exhaust hole under the drive of the connecting rod mechanism; when the floating ball descends, the micro-exhaust valve flap moves away from the exhaust hole under the drive of the connecting rod mechanism, and the exhaust hole opens for micro-exhaust. Description of the drawings

[0024] Figure 1 It is a cross-sectional view of the valve in Embodiment 1 of the present utility model;

[0025] Figure 2 It is Figure 1 The enlarged view of the structure at A in

[0026] Figure 3 It is a cross-sectional view of the valve in Embodiment 2 of the present utility model.

[0027] Description of reference numerals in the schematic diagram:

[0028] 1. Valve body; 11. Water inlet; 12. Valve cavity; 2. Valve cover; 21. Connecting bolt; 3. Floating ball; 31. Connecting sleeve; 32. Floating ball connecting piece; 41. First fixing piece; 42. Second fixing piece; 5. Link mechanism; 51. First link; 511. First fixing pin; 512. Second fixing pin; 513. Third fixing pin; 52. Second link; 53. Third link; 531. Fourth fixing pin; 532. Fifth fixing pin; 6. First adjusting assembly; 61. First adjusting rod; 62. First adjusting nut; 63. Valve flap holder; 7. Micro-discharge valve flap; 8. Second adjusting assembly; 81. Second adjusting rod; 82. Second adjusting nut; 83. Valve seat; 84. Exhaust hole; 9. First sealing ring; 10. Second sealing ring. Detailed implementation manners

[0029] In order to make the above-mentioned objects, features, and advantages of the utility model more obvious and understandable, the following will describe the detailed implementation manners of the utility model with reference to the accompanying drawings. Many specific details are set forth in the following description in order to fully understand the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the utility model. Therefore, the utility model is not limited by the specific embodiments disclosed below.

[0030] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying 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 a limitation of the present utility model.

[0031] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present utility model, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0032] In the present utility model, unless otherwise clearly defined and limited, terms such as "installation", "connection", "linkage", "fixation", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral one; it may be a mechanical connection or an electrical connection; it may be a direct connection or an indirect connection through an intermediate medium, and it may be the internal communication between two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0033] In the present utility model, unless otherwise clearly defined and limited, the first feature may be in direct contact with the second feature "on" or "under" the second feature, or the first and second features may be indirectly in contact through an intermediate medium. Moreover, the first feature "above", "over" and "on top of" the second feature may be directly above or obliquely above the second feature, or merely indicate that the first feature is at a higher horizontal height than the second feature. The first feature "under", "beneath" and "underneath" the second feature may be directly below or obliquely below the second feature, or merely indicate that the first feature is at a lower horizontal height than the second feature.

[0034] It should be noted that when an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used herein are only for the purpose of illustration and do not represent the only implementation.

[0035] Embodiment 1

[0036] Combined with Figure 1 , a micro exhaust valve for online adjusting the sealing performance of an exhaust hole in this embodiment includes a valve body 1 with openings at both the upper and lower ends thereof, and a valve cavity 12 is formed inside. The lower opening of the valve body 1 is a water inlet 11, and a valve cover 2 is provided at the upper opening of the valve body 1. In this embodiment, the valve cover 2 is fixedly connected to the valve body 1 through a plurality of connecting bolts 21. At the end where the valve body 1 is connected to the valve cover 2, a groove is formed, and a first sealing ring 9 is arranged in the groove. When the valve cover 2 is arranged on the valve body 1, the first sealing ring 9 is extruded, thereby sealing the valve cover 2 and the valve body 1 to prevent liquid from seeping into the gap between the two.

[0037] In this embodiment, a through hole is provided in the valve cover 2, and a valve seat 83 is arranged in the through hole. The valve seat 83 is movably arranged in the through hole and can move up and down relative to the valve cover 2. To prevent liquid leakage, a second sealing ring 10 is also sleeved on the valve seat 83. After installation, the valve seat 83 generates a squeezing force on the second sealing ring 10, and the second sealing ring 10 seals the gap between the valve seat 83 and the valve cover 2. In this embodiment, an exhaust hole 84 is provided on the valve seat 83, and the exhaust hole 84 communicates the valve cavity 12 with the outside world.

[0038] Combined with Figure 2 , in this embodiment, a floating ball 3 is arranged in the valve cavity 12. The floating ball 3 is connected to the micro-discharge valve flap 7 through a link mechanism 5. When the floating ball 3 floats or descends, the micro-discharge valve flap 7 is pushed by the link mechanism 5 to approach or move away from the exhaust hole 84, thereby closing or opening the exhaust hole 84. In this embodiment, the link mechanism 5 includes a first link 51, a second link 52, and a third link 53. The first link 51 is connected to the valve cover 2 through a first fixing member 41, and the third link 53 is connected to the valve cover 2 through a second fixing member 42; the first link 51 and the third link 53 are respectively hinged to the second link 52. Specifically, one end of the first link 51 is connected to the valve cover 2 through the first fixing member 41, and the other end is connected to the floating ball 3. The second link 52 is connected to the middle position of the first link 51. In this embodiment, the first link 51 is connected to the first fixing member 41, the first link 51 is connected to the second link 52, and the first link 51 is connected to the floating ball 3 in a hinged manner. In this embodiment, the other end of the second link 52 is connected to the end of the third link 53, and the other end of the third link 53 is connected to the valve cover 2 through the second fixing member 42. The micro-discharge valve flap 7 is arranged at the middle position of the third link 53. In this embodiment, the floating ball 3 and the micro-discharge valve flap 7 are connected to the valve cover 2 together through the link mechanism 5 by the first fixing member 41 and the second fixing member 42. When the valve cover 2 is disassembled, the floating ball 3, the micro-discharge valve flap 7, and the link mechanism 5 can be taken out for maintenance at the same time. In this embodiment, the hinged part between the first link 51 and the first fixing member 41 is connected by a first fixing pin 511, the hinged part between the first link 51 and the second link 52 is connected by a second fixing pin 512, and the hinged part between the first link 51 and the floating ball 3 is connected by a third fixing pin 513. The hinged part between the third link 53 and the second link 52 is connected by a fourth fixing pin 531, and the hinged part between the third link 53 and the second fixing member 42 is connected by a fifth fixing pin 532. In this embodiment, a connecting sleeve 31 is arranged on the floating ball 3, the connecting sleeve 31 is connected to a floating ball connecting member 32, and the floating ball 3 is hinged to the first link 51 through the floating ball connecting member 32.

[0039] In this embodiment, in order to meet the sealing requirements under different working conditions, a first adjusting component 6 and a second adjusting component 8 are provided to adjust the distance between the micro exhaust valve flap 7 and the exhaust hole 84 respectively, so that the micro exhaust valve flap 7 can achieve a good sealing effect under different working conditions. In this embodiment, the first adjusting component 6 is arranged in the valve cavity 12 to adjust the height of the micro exhaust valve flap 7 to make it approach or move away from the exhaust hole 84. The second adjusting component 8 is arranged on the valve seat 83. The second adjusting component 8 is fixedly connected to the valve seat 83. The movement of the second adjusting component 8 drives the valve seat 83 to move, and the exhaust hole 84 formed in the valve seat 83 moves accordingly, approaching or moving away from the adjusting micro exhaust valve flap 7. The exhaust hole 84 penetrates through the valve seat 83 and the second adjusting component 8 to communicate the valve cavity 12 with the outside. In this embodiment, the first adjusting component 6 is adjusted before leaving the factory or during disassembly and maintenance. The second adjusting component 8 is adjusted online and adjusted in real time according to the actual use state.

[0040] Specifically, in this embodiment, the first adjusting component 6 includes a first adjusting rod 61. The end of the first adjusting rod 61 is connected to the micro exhaust valve flap 7. The first adjusting rod 61 is movably arranged on the link mechanism 5. A locking member and / or an adjusting member is arranged on the first adjusting rod 61. A threaded structure is arranged on the outer periphery of the first adjusting rod 61. A first adjusting nut 62 is sleeved on the first adjusting rod 61, and the first adjusting rod 61 is threadedly connected to the first adjusting nut 62. A valve flap holder 63 is arranged at the end of the first adjusting rod 61. The micro exhaust valve flap 7 is coated on the valve flap holder 63 in a form of rubber coating, that is, the rubber material micro exhaust valve flap 7 is vulcanized and formed and fixed together with the valve flap holder 63. In this embodiment, the first adjusting rod 61 is threadedly connected to the third link 53. When adjusting, the first adjusting nut 62 is loosened, and the first adjusting rod 61 moves up and down in the second link 52 through the threaded structure to adjust the distance between the micro exhaust valve flap 7 and the exhaust hole 84. After the adjustment is in place, the first adjusting nut 62 is tightened to lock the first adjusting rod 61.

[0041] The second adjusting component 8 includes a second adjusting rod 81, and the second adjusting rod 81 is connected to the valve seat 83. The two can be designed as a split type or an integral structure. When it is a split type design, the second adjusting rod 81 and the valve seat 83 are connected by a threaded structure. A hexagonal head is provided at the unconnected end of the second adjusting rod 81 for easy screwing. When it is an integral structure, the hexagonal head at the unconnected end of the second adjusting rod 81 is changed to a hexagonal wrench opening for the convenient installation of the second adjusting nut 82. The second adjusting rod 81 and the valve seat 83 are movably arranged on the valve cover 2; a locking member and / or an adjusting member is provided on the second adjusting rod 81. A threaded structure is provided on the outer periphery of the second adjusting rod 81, and a second adjusting nut 82 is provided on the second adjusting rod 81. The second adjusting rod 81 is threadedly connected to the second adjusting nut 82. The second adjusting nut 82 abuts against the valve cover 2. In this embodiment, the valve seat 83 and the valve cover 2 are in interference fit. During adjustment, by using the threaded structure between the second adjusting nut 82 and the second adjusting rod 81, generally by fixing the second adjusting nut 82 and screwing the second adjusting rod 81 to make the second adjusting rod 81 move downward, a downward extrusion force is generated on the valve seat 83, forcing the valve seat 83 to move downward, thereby adjusting the distance between the micro exhaust valve flap 7 and the exhaust hole 84.

[0042] In this embodiment, threaded structures are opened on the adjusting rods in the first adjusting component 6 and the second adjusting component 8, and the adjusting nut is used as a locking member and / or an adjusting member. The adjusting nut can not only be used as a locking member to lock the adjusting rod after adjustment is in place, but also can adjust the up and down position of the adjusting rod by using the threaded structure, which is convenient for fine adjustment of the adjusting rod and can also prevent the position of the adjusting rod from deviating after adjustment.

[0043] Embodiment 2

[0044] Combined with Figure 3 , a micro exhaust valve for online adjusting the airtightness of the exhaust hole in this embodiment provides a second implementation manner of the second adjusting component. The second adjusting rod 81 and the valve seat 83 are of an integral structure, and the second adjusting rod 81 and the valve cover 2 are threadedly connected. During adjustment, loosen the second adjusting nut 82, and use the threaded connection structure between the second adjusting rod 81 and the valve cover 2 to adjust the distance between the micro exhaust valve flap 7 and the exhaust hole 84. After adjustment is completed, tighten the second adjusting nut 82 to lock the second adjusting rod 81, which can realize the approach and separation of the micro exhaust valve flap 7 and the exhaust hole 84. At the same time, the threaded connection between the second adjusting rod 81 and the valve cover 2 further ensures that the distance between the micro exhaust valve flap 7 and the exhaust hole 84 will not change after locking.

[0045] The above has schematically described the present utility model and its implementation manners. This description is not restrictive. What is shown in the drawings is only one of the implementation manners of the present utility model, and the actual structure is not limited thereto. Therefore, if those of ordinary skill in the art are inspired by this and, without departing from the gist of the creation of the present utility model, design without creativity structural modes and embodiments similar to this technical solution, they shall all fall within the protection scope of the present utility model.

Claims

1. A micro exhaust valve for online adjusting the sealing performance of an exhaust hole, characterized in that, It includes a valve body (1), a valve cover (2) is arranged on the valve body (1), a valve cavity (12) is formed in the valve body (1), a valve seat (83) is arranged on the valve cover (2), and an exhaust hole (84) is formed in the valve seat (83); a floating ball (3) is arranged in the valve cavity (12), the floating ball (3) is connected to a micro-exhaust valve flap (7) through a connecting rod mechanism (5), and the micro-exhaust valve flap (7) can close or open the exhaust hole (84); a second adjusting component (8) is arranged on the valve seat (83) for adjusting the distance between the exhaust hole (84) and the micro-exhaust valve flap (7) from the outside.

2. The micro exhaust valve for online adjusting the sealing performance of the exhaust hole according to claim 1, characterized in that, The second adjusting component (8) includes a second adjusting rod (81), the second adjusting rod (81) is connected to the valve seat (83), and the second adjusting rod (81) and the valve seat (83) are movably arranged on the valve cover (2); a locking member and / or an adjusting member is arranged on the second adjusting rod (81).

3. The micro exhaust valve for online adjusting the sealing performance of the exhaust hole according to claim 2, wherein The valve seat (83) and the valve cover (2) are in interference fit, the second adjusting rod (81) is connected to the valve seat (83), and the second adjusting rod (81) is used to push the valve seat (83) to move towards the micro-exhaust valve flap (7).

4. An online adjustable micro-exhaust valve for adjusting the sealing performance of an exhaust hole, characterized in that, The second adjusting rod (81) and the valve seat (83) are of an integral structure, the second adjusting rod (81) is threadedly connected to the valve cover (2), and when the second adjusting rod (81) is turned, the second adjusting rod (81) and the valve seat (83) can be selectively moved towards or away from the micro-exhaust valve flap (7).

5. An online adjustable micro-exhaust valve for regulating the sealing performance of an exhaust hole, according to any one of claims 2 to 4, characterized in that, A threaded structure is arranged on the outer periphery of the second adjusting rod (81), a second adjusting nut (82) is arranged on the second adjusting rod (81), and the second adjusting nut (82) is threadedly connected to the second adjusting rod (81) as a locking member and / or an adjusting member; the second adjusting nut (82) abuts against the valve cover (2).

6. The micro exhaust valve for online adjusting the airtightness of the exhaust hole according to claim 1, wherein, A first adjusting component (6) is further arranged in the valve cavity (12) for adjusting the distance between the micro-exhaust valve flap (7) and the exhaust hole (84) from the inside; the micro-exhaust valve flap (7) is connected to the connecting rod mechanism (5) through the first adjusting component (6).

7. The micro exhaust valve for online adjusting the sealing performance of the exhaust hole according to claim 6, wherein, A valve flap holder (63) is arranged on the first adjusting component (6), and the micro-exhaust valve flap (7) is wrapped on the valve flap holder (63).

8. An online-adjustable micro exhaust valve for adjusting the airtightness of an exhaust hole, characterized in that, The connecting rod mechanism (5) includes a first connecting rod (51), a second connecting rod (52) and a third connecting rod (53), the first connecting rod (51) is connected to the valve cover (2) through a first fixing member (41), and the third connecting rod (53) is connected to the valve cover (2) through a second fixing member (42); the first connecting rod (51) and the third connecting rod (53) are respectively hinged to the second connecting rod (52).

9. An online adjustable micro exhaust valve for adjusting the sealing performance of an exhaust hole, characterized in that, One end of the first connecting rod (51) is connected to the first fixing member (41), and the other end is connected to the floating ball (3), and the second connecting rod (52) is connected to the middle of the first connecting rod (51); one end of the third connecting rod (53) is connected to the second fixing member (42), and the other end is connected to the second connecting rod (52); the valve flap holder (63) is arranged on the third connecting rod (53).

10. The micro exhaust valve for online adjusting the airtightness of the exhaust hole according to claim 9, characterized in that, A connecting sleeve (31) is arranged on the floating ball (3), the connecting sleeve (31) is connected to a floating ball connecting piece (32), and the floating ball (3) is hinged to a first connecting rod (51) through the floating ball connecting piece (32).

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