Micro exhaust valve

Abstract

The utility model discloses a trace exhaust valve, and belongs to the technical field of exhaust valves. Comprising a valve body, a bonnet and a lever assembly. A valve cavity is formed in the valve body, a water inlet communicated with the valve cavity is further formed in the valve body, and a floating ball and a plugging piece are arranged in the valve cavity; the valve cover is connected with the valve body in a sealed mode, and an exhaust hole is formed in the valve cover. The lever assembly is connected with the valve deck and the floating ball, and a limiting piece is arranged at at least one connecting position of the lever assembly, the valve deck and the floating ball. The plugging piece is arranged on the lever assembly; when the floating ball floats up and down, the blocking piece is driven by the lever assembly to close or open the exhaust hole, and after the floating ball floats down to open the exhaust hole, the lever assembly can abut against the limiting piece to limit the unfolding angle of the lever assembly. Therefore, the phenomenon of easy failure caused by overlarge unfolding angle of the lever assembly is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of exhaust valves, and more specifically, to a micro exhaust valve. Background Art

[0002] During the process of pipeline water conveyance, the 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 the water conveyance difficult and reduces the water conveyance capacity of the system. As one of the most commonly used air valves, the main function of the micro exhaust valve is to timely discharge the air precipitated from the water during the operation of the pipeline, prevent the pipeline from being blocked by gas accumulation, and is suitable for being installed 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. At the same time, it is also often used in the secondary water supply pipeline and the fire protection system.

[0003] Most of the existing micro exhaust valves are of lever structure. For example, the micro exhaust valve disclosed in the patent publication number CN219975579U 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 communicating 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. However, the micro exhaust valve usually needs to be installed perpendicular to the ground plane. When there is no water in the micro exhaust valve in this scheme, due to the weight of the floating ball, the floating ball is located at the lowest position in the valve cavity, and the lever will swing at a large angle or rotate and droop, which is likely to cause the lever to lose flexibility; moreover, due to the large expansion angle of the lever mechanism, the floating ball is likely to hit the inner wall of the valve body when it falls due to gravity, and it is easy to cause deformation and damage of the floating ball after a long time. Summary of the Utility Model

[0004] The utility model provides a micro exhaust valve, which reduces the swinging or rotating amplitude of the lever when there is no water and improves the flexibility of the lever mechanism.

[0005] To achieve the above object, the technical solution provided by the utility model is as follows:

[0006] A micro exhaust valve, comprising a valve body, a valve cover and a lever assembly;

[0007] A valve cavity is arranged inside the valve body. The valve body is also provided with a water inlet communicating with the valve cavity. A floating ball and a plugging member are arranged in the valve cavity. The valve cover is hermetically connected to the valve body, and an exhaust hole is arranged on the valve cover;

[0008] The lever assembly is connected to the valve cover and the floating ball, and a limiting member is arranged at least at one connection where the lever assembly is connected to the valve cover and the floating ball; the plugging member is arranged on the lever assembly;

[0009] When the floating ball floats up and down, it drives the blocking member to close or open the exhaust hole through the lever assembly, and after the floating ball floats down to open the exhaust hole, the lever assembly can abut against the limiting member to limit the unfolding angle of the lever assembly.

[0010] As a further improvement, the lever assembly includes an upper lever, a lower lever, and a connecting rod whose two ends are respectively connected to the upper lever and the lower lever; both the upper lever and the lower lever are hinged to the valve cover through the first connecting seat, and the lower lever is also hinged to the floating ball through the first connecting seat.

[0011] As a further improvement, the limiting member is arranged on the first connecting seat connected to one end of the lower lever, and one side of the lower lever can abut against the limiting member so that the swinging angle of the lower lever does not exceed 15°.

[0012] As a further improvement, the limiting member and the first connecting seat are integrally formed.

[0013] As a preferred embodiment, the side surface of the limiting member abutting against the lower lever is a limiting surface, and the limiting surface is inclined.

[0014] Preferably, the first connecting seat is a hinge seat, one end is fixedly connected to the valve cover or the floating ball through a fixing member, and the other end is hinged to the upper lever or the lower lever.

[0015] As an embodiment, the blocking member is connected to the upper lever through an adjusting member, the adjusting member is threadedly connected to the upper lever, and the blocking member is connected to the top end of the adjusting member.

[0016] Preferably, a valve seat is also hermetically connected to the valve cover, and the exhaust hole is opened on the valve seat.

[0017] Preferably, a connecting sleeve is arranged on the floating ball, and the first connecting seat is connected to the connecting sleeve.

[0018] Furthermore, one end of the valve seat extends into the valve cavity, and an annular step is arranged at this end.

[0019] Adopting the technical solution provided by the present utility model, compared with the prior art, it has the following beneficial effects:

[0020] In this solution, a limiting member is arranged at at least one connection point where the lever assembly is connected to the valve cover and the floating ball. After the floating ball floats down to open the exhaust hole, the lever assembly can abut against the limiting member to limit the unfolding angle of the lever assembly, thereby avoiding the phenomenon that the lever assembly is prone to malfunction due to too large an unfolding angle.

[0021] Other technical problems that can be solved by the micro exhaust valve of the present utility model, other technical features included in the technical solution, and the advantages brought by these technical features will be further described in detail with reference to the accompanying drawings. Description of the Drawings

[0022] Figure 1 Schematic diagram of the closed state of the micro exhaust valve;

[0023] Figure 2 Schematic diagram of the open state of the micro exhaust valve;

[0024] Figure 3 For Figure 1 Schematic diagram of the enlarged structure at position A in

[0025] Figure 4 Schematic diagram of the lower lever connection.

[0026] Reference Numeral Description:

[0027] 1. Valve body; 11. Water inlet; 2. Valve cover; 21. Valve seat; 211. Annular step; 22. Exhaust hole; 3. Floating ball; 31. Connecting sleeve; 4. Bolt; 51. Upper lever; 52. Lower lever; 53. Connecting rod; 6. First connecting seat; 61. Limiting member; 611. Limiting surface; 7. Adjusting member; 71. Sealing member; 8. Fixing member. Detailed Description of the Preferred Embodiment

[0028] To further understand the content of the present utility model, the present utility model will be described in detail with reference to the accompanying drawings and embodiments.

[0029] The structures, ratios, sizes, etc. shown in the drawings of this specification are only used to cooperate with the content disclosed in the specification for those skilled in this technology to understand and read, and are not used to limit the conditions under which the present utility model can be implemented. Therefore, they do not have any technical essence. Any modification of the structure, change of the proportional relationship, or adjustment of the size, without affecting the effects that the present utility model can produce and the purposes that can be achieved, should still fall within the scope that can be covered by the technical content disclosed in the present utility model.

[0030] At the same time, terms such as "upper", "lower", "left", "right", "middle", etc. cited in this specification are only for the convenience of description and are not used to limit the scope that can be implemented. The change or adjustment of their relative relationships, without substantial change in the technical content, should also be regarded as the scope that the present utility model can be implemented. And, in addition to being able to represent the orientation or position relationship, some of the above terms may also be used to represent other meanings. For example, the term "upper" may also be used to represent a certain attachment relationship or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to specific circumstances.

[0031] It should be noted that the terms "first", "second", etc. in the description, claims and above-mentioned drawings of this application are used to distinguish similar objects, and do not necessarily have to be used to describe a specific order or sequence. It should be understood that such data used can be interchanged under appropriate circumstances for the embodiments of this application described herein.

[0032] As Figure 1 shown, a micro air vent valve is installed in the water pipeline system for discharging the air precipitated from the water during the operation of the pipeline. The water inlet of the micro air vent valve is connected to the water pipeline, and the precipitated air enters the valve cavity and is finally discharged through the air vent hole.

[0033] Specifically, a micro air vent valve is provided, which includes a valve body 1 and a valve cover 2. A valve cavity is opened in the valve body 1, and a water inlet 11 communicating with the valve cavity is also opened on the valve body 1. A floating ball 3 and a plugging member 71 are arranged in the valve cavity. The valve cover 2 is hermetically connected to the valve body 1, and an air vent hole 22 is arranged on the valve cover 2.

[0034] In order to improve the connection sealing performance between the valve body 1 and the valve cover 2, the valve body 1 and the valve cover 2 are connected into a whole by bolts 4, and a sealing ring, such as an O-ring, etc., is arranged between the valve body 1 and the valve cover 2. And in order to make the sealing ring arranged more stably, a placement groove for the sealing ring to be embedded is opened on the valve body 1.

[0035] A micro air vent valve further includes a lever assembly, the lever assembly is connected to the valve cover 2 and the floating ball 3, and a limiting member 61 is arranged at a connection where the lever assembly is connected to the valve cover 2 and the floating ball 3; the plugging member 71 is arranged on the lever assembly.

[0036] Combined with Figure 2 shown, during the operation of the water pipeline, water enters the valve cavity of the valve body 1 through the water inlet 11. The rising water level in the valve cavity causes the floating ball 3 to float. During the floating process of the floating ball 3, the lever assembly is driven to rotate until the plugging member 71 located on the lever assembly plugs the air vent hole 22, closing the air vent hole 22 to prevent water from leaking out through the air vent hole 22. During the operation of the pipeline, the precipitated air enters the valve cavity, the pressure in the valve cavity increases, the water level drops, causing the floating ball 3 to sink. During the sinking process of the floating ball 3, the lever assembly is driven to rotate, the plugging member 71 moves away from the air vent hole 22, opening the air vent hole 22, and the air is discharged through the air vent hole 22.

[0037] When the position-limiting member 61 is not provided, during the non-operating period of the pipeline, there is no water in the valve cavity of the valve body 1, and the floating ball 3 falls under gravity, driving the lever assembly to rotate to the maximum angle. In this case, it is easy for the lever to lose flexibility. Moreover, in some cases, the floating ball 3 falls under gravity and reaches the lowest part of the valve cavity, where it is likely to collide with the inner wall of the valve body 1, and over time, it is easy for the floating ball 3 to deform or be damaged. Or during the operation of the pipeline, when the floating ball 3 floats downward and drives the blocking member 71 to open the exhaust hole 22 through the lever assembly, if the rotation or swing angle of the lever assembly is too large, the phenomenon that the lever loses flexibility is also likely to occur.

[0038] However, in this embodiment, the position-limiting member 61 is provided. During the downward floating process of the floating ball 3, the lever assembly can abut against the position-limiting member 61 to limit the unfolding angle of the lever assembly. As Figure 2 shown in the figure, after the lever assembly unfolds to a certain angle, one side of the lever assembly abuts against the position-limiting member 61. At this time, although the water level in the valve cavity continues to drop or there is no water, due to the abutment of the lever assembly against the position-limiting member 61, the position-limiting member 61 restricts the lever assembly from continuing to rotate or swing, thereby avoiding the situation where the rotation or swing angle of the lever assembly is too large, and at the same time avoiding the situation where the floating ball 3 continues to float downward and collides with the inner wall of the valve body 1.

[0039] Specifically, as shown in Figure 3 the figure, the lever assembly includes an upper lever 51, a lower lever 52, and a connecting rod 53 with both ends respectively connected to the upper lever 51 and the lower lever 52. Both the upper lever 51 and the lower lever 52 are hinged to the valve cover 2 through the first connecting seat 6, and the lower lever 52 is also hinged to the floating ball 3 through the first connecting seat 6.

[0040] In a specific case, as shown in Figure 4 the figure, the first connecting seat 6 is a hinge seat, which can be fixedly connected to the valve cover 2 or the floating ball 3 through a fixing member 8, and can be hinged to the lever assembly at the same time. The fixing member 8 can be a bolt, or any component that can be fixed.

[0041] Three first connecting seats 6 are provided. Specifically, two first connecting seats 6 are fixedly connected to the valve cover 2, and one first connecting seat 6 is fixedly connected to the floating ball 3. One end of the upper lever 51 is hinged to one of the first connecting seats 6 on the valve cover 2, the other end of the upper lever 51 is connected to the connecting rod 53, the other end of the connecting rod 53 is connected to the lower lever 52, one end of the lower lever 52 is hinged to the other first connecting seat 6 on the valve cover 2, and the other end of the lower lever 52 is hinged to the first connecting seat 6 on the floating ball 3. Taking the downward floating of the floating ball 3 to open the exhaust hole 22 as an example, when the floating ball 3 floats downward, it drives the lower lever 52 to rotate, and the lower lever 52 drives the connecting rod 53, so that the connecting rod 53 pulls the upper lever 51 to rotate. The blocking member 71 is specifically arranged on the upper lever 51. After the upper lever 51 rotates, the blocking member 71 leaves the exhaust hole 22, thereby opening the exhaust hole 22. For other floating situations of the floating ball 3, the operation of the lever assembly is the same as that of the downward floating of the floating ball 3.

[0042] The limiter 61 is provided on the first connecting seat 6 connected to the lower lever 52 and the valve cover 2. One side of the lower lever 52 can abut against the limiter 61, so that the swing angle of the lower lever 52 does not exceed 15°. The end of the lower lever 52 close to the limiter 61 needs to be extended so that the end of the lower lever 52 can abut against the limiter 61 when it swings. In other cases, the limiter 61 can also be provided on other first connecting seats 6, for example, the limiter 61 is provided on the first connecting seat 6 connected to the lower lever 52 and the float 3. Alternatively, a plurality of limiters 61 can be provided so that multiple positions of the lever assembly can abut against the limiter 61.

[0043] It should be noted that the swing angle of the lower lever 52 does not exceed 15°. The specific setting of this angle can be determined according to actual conditions, but the specific setting of this angle also needs to meet the following conditions: when the lower lever 52 drives the upper lever 51 to work in conjunction, the blocking member 71 on the upper lever 51 can open the exhaust hole 22.

[0044] In one embodiment, the stopper 61 is integrally formed with the first connection base 6 and can be used as a part of the first connection base 6 to improve the efficiency of the stopper 61. However, in other embodiments, the stopper 61 can also be independently provided and fixedly connected to the first connection base 6.

[0045] like Figure 4 As shown, the side surface where the stopper 61 contacts the lower lever 52 is a stopper surface 611, and the stopper surface 611 is tilted. When the lower lever 52 rotates, it contacts the stopper surface 611. The tilted stopper surface 611 matches the side surface of the rotated lower lever 52, increasing the contact area between the stopper 61 and the lower lever 52 and making the contact of the lower lever 52 more secure and stable.

[0046] See Figure 3 In order to facilitate the adjustment of the position of the blocking member 71 so that the blocking member 71 can effectively close the exhaust hole 22, the blocking member 71 is connected to the upper lever 51 through the adjusting member 7. Specifically, the adjusting member 7 is a threaded member such as a screw or a bolt. The adjusting member 7 passes through the upper lever 51 and is threadedly connected thereto, and can be fixed by a nut. The head of the screw or bolt is arranged near the exhaust hole 22, and the blocking member 71 is mounted on the head of the screw or bolt. Specifically in this embodiment, the blocking member 71 is connected to the top of the adjusting member 7. Rotating the adjusting member 7 can adjust the position of the blocking member 71 relative to the exhaust hole 22, so that the blocking member 71 can effectively seal the exhaust hole 22.

[0047] A valve seat 21 is also sealingly connected to the valve cover 2, and an exhaust hole 22 is formed in the valve seat 21. A sealing ring is provided on the side surface of the valve seat 21 in contact with the valve cover 2. The sealing ring is embedded in the valve seat 21 to make the sealing performance between the valve seat 21 and the valve cover 2 better. In one case, a through hole for installing the valve seat 21 is formed in the valve cover 2, and the valve seat 21 is installed in the through hole by interference fit. One end of the valve seat 21 extends into the valve cavity, and an annular step 211 is provided at this end. During the process of the blocking member 71 controlling the opening and closing of the exhaust hole 22, the blocking member 71 will impact the valve seat 21. After long-term operation, it is easy to cause the valve seat 21 to sink into the through hole where it is located, which may easily lead to the situation that the blocking member 71 cannot close the exhaust hole 22. By providing the annular step 211, the annular step 211 can abut against the valve cover 2, thereby restricting the displacement of the valve seat 21.

[0048] A connecting sleeve 31 is provided on the floating ball 3, and the first connecting seat 6 is connected to the connecting sleeve 31. The connecting sleeve 31 provides an installation position for the first connecting seat 6 on the floating ball 3. The connecting sleeve 31 can be integrally formed and connected together, improving the connection firmness between the floating ball 3 and the connecting sleeve 31. The first connecting seat 6 is installed on the connecting sleeve 31.

[0049] In this solution, the micro exhaust valve adopts the amplification principle of the lever assembly to ensure that the exhaust hole 22 can be opened. By providing a limiting member 61 to limit the unfolding angle of the lever assembly, the situation that the lever assembly is prone to malfunction due to too large an unfolding angle can be avoided. Limiting the swinging angle of the lever assembly can minimize the volume of the valve cavity in the valve body 1 and reduce the cost of the micro exhaust valve.

[0050] Moreover, the blocking member 71 and the floating ball 3 are connected to the valve cover 2 as a whole through the lever assembly. When the valve cover 2 is disassembled, the blocking member 71 and the floating ball 3 can be removed simultaneously, which is convenient for maintenance and repair. Specifically, both the upper lever 51 and the lower lever 52 are connected to the valve cover 2 through the first connecting seat 6. The upper lever 51 and the lower lever 52 are connected through a connecting rod 53. The blocking member 71 is connected to the upper lever 51, and the floating ball 3 is connected to the lower lever 52. Thus, when the valve cover 2 is disassembled, the blocking member 71 and the floating ball 3 can be removed simultaneously.

[0051] The terms "installed", "provided", "equipped with", and "connected" referred to herein should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or there is internal communication between two devices, components, or parts. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0052] 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 it and, without departing from the gist of the creation of the present utility model, design without creativity a structural manner and an embodiment similar to the technical solution, they shall fall within the protection scope of the present utility model.

Claims

1. A micro exhaust valve, comprising: A valve body (1) having a valve cavity therein, and a water inlet (11) communicating with the valve cavity is further provided on the valve body (1), and a floating ball (3) and a blocking member (71) are arranged in the valve cavity; A valve cover (2) hermetically connected to the valve body (1), and an exhaust hole (22) is provided on the valve cover (2); It is characterized in that it further comprises: A lever assembly connected to the valve cover (2) and the floating ball (3), and a limiting member (61) is arranged at at least one connection point where the lever assembly is connected to the valve cover (2) and the floating ball (3); the blocking member (71) is arranged on the lever assembly; When the floating ball (3) floats up and down, the blocking member (71) is driven by the lever assembly to close or open the exhaust hole (22), and after the floating ball (3) floats down to open the exhaust hole (22), the lever assembly can abut against the limiting member (61) to limit the unfolding angle of the lever assembly.

2. The micro exhaust valve according to claim 1, characterized in that: The lever assembly includes an upper lever (51), a lower lever (52), and a connecting rod (53) with two ends respectively connected to the upper lever (51) and the lower lever (52); both the upper lever (51) and the lower lever (52) are hinged to the valve cover (2) through a first connecting seat (6), and the lower lever (52) is also hinged to the floating ball (3) through the first connecting seat (6).

3. The micro exhaust valve according to claim 2, characterized in that: The limiting member (61) is arranged on the first connecting seat (6) connected to one end of the lower lever (52), and one side of the lower lever (52) can abut against the limiting member (61), so that the swinging angle of the lower lever (52) does not exceed 15°.

4. The micro exhaust valve according to claim 3, characterized in that: The limiting member (61) and the first connecting seat (6) are integrally formed.

5. The micro exhaust valve according to claim 3, wherein: The side surface of the limiting member (61) abutting against the lower lever (52) is a limiting surface (611), and the limiting surface (611) is inclined.

6. The micro exhaust valve according to claim 3, characterized in that: The first connecting seat (6) is a hinge seat, one end is fixedly connected to the valve cover (2) or the floating ball (3) through a fixing member (8), and the other end is hinged to the upper lever (51) or the lower lever (52).

7. The micro exhaust valve according to any one of claims 2-6, characterized in that: The blocking member (71) is connected to the upper lever (51) through an adjusting member (7), the adjusting member (7) is threadedly connected to the upper lever (51), and the blocking member (71) is connected to the top end of the adjusting member (7).

8. The micro exhaust valve according to claim 7, wherein: A valve seat (21) is further hermetically connected to the valve cover (2), and the exhaust hole (22) is provided on the valve seat (21).

9. The micro exhaust valve according to claim 7, characterized in that: A connecting sleeve (31) is arranged on the floating ball (3), and the first connecting seat (6) is connected to the connecting sleeve (31).

10. The micro exhaust valve according to claim 8, characterized in that: One end of the valve seat (21) extends into the valve cavity, and an annular step (211) is provided at this end.

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