Balanced ramped exhaust valve

Abstract

The application discloses a balanced gradual exhaust valve, which comprises a valve body, a valve cover connected to the top of the valve body, a liquid inlet communicating with a valve cavity arranged at the bottom of the valve body, a floating element, a diaphragm and a valve seat arranged in sequence along a central axis in the valve cavity, wherein the floating element is close to the liquid inlet, the top end of the valve seat is fixedly connected to the valve body, the diaphragm is connected to the floating element through a central position, and the outer circumferential side of the diaphragm is fixedly connected to the bottom of the valve seat through a fastener; the valve seat is provided with an air inlet channel communicating with the valve cavity on the outer circumferential side, the valve seat is provided with a central channel communicating with the air inlet channel along the central axis, the other end of the central channel penetrates through the valve seat downward, the valve seat is provided with an exhaust channel at the bottom opposite to the diaphragm and in the range of the inner ring of the fastener, the exhaust channel is distributed in a staggered manner with the central channel and the air inlet channel, and the other end of the exhaust channel extends to the outside of the valve body. The balanced gradual exhaust valve provided by the application has the advantages of small force required for valve opening and closing, large exhaust capacity and convenient use.

Description

Technical Field

[0001] This utility model relates to the field of valve equipment technology, and in particular to a balanced gradual-acting exhaust valve. Background Technology

[0002] The exhaust structures commonly found on the market are generally those where the buoyancy of the floating component acts directly on the valve disc due to the difference between buoyancy and gravity, or are amplified by levers.

[0003] The valve body and valve cover are generally cylindrical or square. They are fastened with bolts and sealed with sealing rings. The floating part inside the valve body cavity will automatically float up after water flows in, until it reaches the top and is sealed by the sealing ring to seal the small air vent, thus limiting water leakage outside the valve.

[0004] As the gas level inside the valve chamber increases, the water level drops, and the buoyancy gradually decreases. When the buoyancy drops below the weight of the floating component, it will fall, causing the sealing ring to detach from the micro-vent, quickly expelling the gas from the valve chamber. However, whether the floating component can fall quickly depends heavily on the adhesion of the sealing ring. Furthermore, in high-pressure environments, the small diameter of the micro-vent hole significantly affects the venting capacity; otherwise, the valve body structure would need to be enlarged. Therefore, existing vent valves have the following drawbacks:

[0005] 1. The nozzle is controlled by a float. The valve is closed when the buoyancy of the float (or the buoyancy amplified by the lever) reaches the sealing pressure of the medium. The valve is opened when the weight of the float (or the weight amplified by the lever) exceeds the force exerted by the pressure on the nozzle (pressure * nozzle area). Therefore, there are only two states: fully open and fully closed.

[0006] 2. To obtain the required switching force, the overall structure is relatively large, but the exhaust area is small, typically 2mm for direct-acting valves. 2 (DN≤25);

[0007] 3. When the valve is closed, there is an impact force on the sealing ring, which can easily damage the sealing ring and cause water leakage.

[0008] 4. As pressure increases, the required valve opening force also increases accordingly. Therefore, most conventional exhaust valves can only be used in low-pressure applications (PN≤16). Utility Model Content

[0009] This application provides a balanced gradual exhaust valve, which requires less force to open and close, has a large exhaust volume, and is suitable for both high-pressure and low-pressure exhaust environments. The working state is gradual, with a half-open state in addition to fully open and fully closed states. It uses its own internal pressure difference to help with sealing, making the sealing more reliable and less likely to damage the diaphragm, and has a low cost.

[0010] This application provides a balanced gradual exhaust valve, including a valve body with a valve cavity. The valve body has a valve cover connected to the top of the valve body and an inlet communicating with the valve cavity at the bottom. A floating element, a diaphragm, and a valve seat are arranged sequentially along the central axis inside the valve cavity. The floating element is close to and used to seal the inlet. The top of the valve seat is fixedly connected to the valve body. The diaphragm is connected to the floating element through the center position. The outer periphery of the diaphragm is fixedly connected to the bottom of the valve seat by fasteners.

[0011] The valve seat has an air inlet channel on its outer periphery that connects to the valve cavity. The valve seat has a central channel along its central axis that connects to the air inlet channel. The other end of the central channel extends toward the diaphragm and through the valve seat. The valve seat has an exhaust channel at the bottom opposite the diaphragm and within the inner ring of the fastener. The exhaust channel is staggered from both the central channel and the air inlet channel. The other end of the exhaust channel extends to the outside of the valve body for exhaust.

[0012] In one possible implementation, the diaphragm has an integrally formed protrusion at the central axis position, and the protrusion is fixedly embedded in the top of the floating member.

[0013] In one possible implementation, the diaphragm is an elastomer.

[0014] In one possible implementation, the intake passage is arranged in a cross shape, and the exhaust passage is arranged radially from the center to the outer ring in the positions not covered by the intake passage and the central passage.

[0015] In one possible implementation, a pressure plate is provided between the diaphragm and the valve seat, directly opposite the fastener.

[0016] In one possible implementation, the fastener is a fastening screw that passes through the diaphragm and the pressure plate in sequence and is screwed into the valve seat.

[0017] In one possible implementation, the fastener is a pressure plate with external threads, and the valve seat has internal threads that mate with the external threads.

[0018] Beneficial effects: Compared with the prior art, the balanced progressive air release valve provided in this application sequentially designs a valve seat with an air release channel, a diaphragm, and a floating element within the valve cavity. As air accumulates, the floating element gradually loses buoyancy, and the downward pull on the diaphragm gradually increases, causing the diaphragm to gradually move away from the valve seat from the inside out, thus opening the air release channel sequentially until the floating element completely loses buoyancy, fully opening the valve. As the water level rises, buoyancy increases, and the downward pull on the diaphragm gradually decreases, causing the diaphragm to gradually adhere to the valve seat from the outside in, and then move away from the outside in. The exhaust passage is sealed until the diaphragm completely loses tension and the valve is fully closed. This allows the valve to automatically adjust the discharge volume according to the amount of air in the pipe, until it is fully open or fully closed. Under the pressure on both sides of the diaphragm, the force required to open and close the valve is small. At the same time, when the diaphragm is close, the pressure difference between the inside and outside of the outer ring will help the valve close. The required sealing force is small and leakage is not easy. In addition, this gradual opening and closing design minimizes the impact force on the diaphragm and is not easy to damage the diaphragm. Furthermore, the exhaust area can be determined as needed, making it more convenient and flexible to use.

[0019] These and other objects, features and advantages of this utility model will be fully realized through the following detailed description. Attached Figure Description

[0020] Figure 1 A cross-sectional structural schematic diagram of the balanced gradual exhaust valve of this application is shown.

[0021] Figure 2 This application shows Figure 1 A magnified structural diagram of part A in the middle.

[0022] Figure 3 A partial top view of the valve seat structure in this application is shown.

[0023] Figure 4 The diagram shows the state of the diaphragm near the central axis in three states of the balanced gradual exhaust valve of this application.

[0024] Figure 5 A partial cross-sectional view of the balanced gradual exhaust valve of this application is shown. Detailed Implementation

[0025] The following description is intended to disclose the present invention so that those skilled in the art can implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art. The basic principles of the present invention defined in the following description can be applied to other embodiments, modifications, improvements, equivalents, and other technical solutions that do not depart from the spirit and scope of the present invention.

[0026] Those skilled in the art should understand that, in the disclosure of this specification, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limitations on this utility model.

[0027] It is understood that the term "a" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple, and the term "a" should not be understood as a limitation on the number.

[0028] refer to Figures 1 to 5 This application provides a balanced, gradual-acting exhaust valve, including a valve body 10. The valve body 10 has a valve cavity 101, and a valve cover 20 is connected to the top of the valve body 10. The bottom of the valve body 10 has an inlet 102 communicating with the valve cavity 101. A floating element 30, a diaphragm 40, and a valve seat 50 are arranged sequentially along the central axis inside the valve cavity 101. The floating element 30 can also be called a float or a float ball. The floating element 30 is close to and used to seal the inlet 102. The top of the valve seat 50 is fixedly connected to the valve body 10. The diaphragm 40 is connected to the floating element 30 through its center position, and the outer periphery of the diaphragm 40 is fixedly connected to the bottom of the valve seat 50 by fasteners 41.

[0029] Preferably, a pressure plate is provided between the diaphragm 40 and the valve seat 50 at the position opposite to the fastener 41, which can increase the contact area between the diaphragm 40 and the valve seat 50 and improve the connection stability of the diaphragm 40 on the outside.

[0030] More preferably, the fastener 41 is a fastening screw, which passes through the diaphragm 40 and the pressure plate in sequence and is screwed into the valve seat 50 to fix the diaphragm 40.

[0031] In another embodiment, combined with Figure 5 The fastener 41 is a pressure plate, and the pressure plate is provided with external threads. Correspondingly, the valve seat 50 is provided with internal threads that cooperate with the external threads. The diaphragm 40 is directly fastened to the valve seat 50 by the pressure plate, which not only has good connection stability, but also has a large connection area between the pressure plate and the valve seat 50.

[0032] The valve seat 50 has an air intake channel 501 (e.g., vertically) on its outer periphery that connects to the valve cavity 101. Simultaneously, the valve seat 50 has a central channel 502 along its central axis that connects to the air intake channel 501. The other end of the central channel 502 extends towards the diaphragm 40 and penetrates the valve seat 50. Furthermore, the valve seat 50 has an exhaust channel 503 at its bottom, directly opposite the diaphragm 40, within the inner ring of the fastener 41. The exhaust channel 503 is offset from both the central channel 502 and the air intake channel 501. The other end of the exhaust channel 503 extends to the outside of the valve body 10 for exhaust.

[0033] When venting is required during the valve opening process, as the gas accumulates in the valve chamber 101, the weight of the floating component 30 gradually exceeds the buoyancy. The floating component 30 drives the diaphragm 40 to gradually move downward at the central axis position, so that the diaphragm 40 forms a dome after being compressed in the center. As the force increases, the height and range of the dome gradually expand, and the exhaust channels 503 are opened sequentially from the inside to the outside. The valve opening gradually increases, and the exhaust volume gradually increases. At this time, the gas in the valve chamber 101 enters the gap between the valve seat 50 and the diaphragm 40 sequentially through the intake channel 501 and the central channel 502, and then exits the valve through the opened exhaust channels 503. As the floating component 30 completely loses buoyancy, the diaphragm 40 opens all the exhaust channels 503, and the valve is fully open. At the same time, at the moment the dome opens, the pressure at the intake end enters, and an instantaneous balance is formed with the other side of the diaphragm. That is to say, regardless of the pressure, the pressure on the upper and lower parts of the diaphragm is the same, which is a dynamic balance process.

[0034] Conversely, as the water level in the valve chamber 101 rises, the buoyancy of the water flow on the floating component 30 gradually increases, and the downward force of the floating component 30 on the diaphragm 40 gradually decreases. That is, the force on the center point of the diaphragm decreases, the height and range of the dome gradually shrink, the valve opening decreases, the exhaust volume gradually decreases, and the diaphragm 40 gradually adheres to the valve seat 50 from the outside to the inside, and then sequentially closes the exhaust passages 503 from the outside to the inside until the diaphragm 40 completely loses its downward force and blocks all the exhaust passages 503, and the valve is fully closed.

[0035] This results in a balanced, gradual (gradually opening or gradually closing) exhaust valve, which not only has two states: fully open and fully closed;

[0036] When the diaphragm 40 is opened for venting, the greater the force exerted by the floating element 30 on the diaphragm 40, the larger the opening diameter of the diaphragm 40 and the greater the venting volume.

[0037] When the valve is closed, the smaller the force exerted by the floating element 30 on the diaphragm 40, the smaller the opening diameter of the diaphragm 40, and the smaller the exhaust volume.

[0038] The opening degree of the diaphragm 40 is affected by the amount of gas accumulated. It is a dynamic opening and closing process that will adaptively open to a suitable degree for exhaust. At the same time, the optimal exhaust volume can be designed according to the requirements or valve structure size.

[0039] The exhaust valve provided in this application will automatically adjust the exhaust volume according to the position of the floating part, or according to the amount of air in the pipe, until it is fully open or fully closed, resulting in a large exhaust volume;

[0040] During the valve opening process, the pressure on both sides of the diaphragm 40 is equal, and the effect is the same under all pressures, unaffected by pressure, and adaptable to exhaust under high pressure conditions;

[0041] Under the pull of the floating component 30 and the buoyancy of the water flow, the force required to open and close the valve is small, and the required structure is also small. At the same time, when the diaphragm 40 is close to closing the valve, the pressure difference between the inside and outside of the outer ring will help the valve close. Therefore, the required sealing force is small and leakage is not easy.

[0042] This gradually opening and closing structural design ensures that the diaphragm is not subjected to or is minimally subjected to impact, resulting in a long service life.

[0043] The exhaust area can be determined as needed, meaning it can be flexibly designed based on the intake channel 501, the central channel 502, and the exhaust channel 503, making it highly adaptable.

[0044] In one embodiment, the diaphragm 40 is integrally provided with a protruding structure 42 at the central axis position, and the protruding structure 42 is fixedly embedded on the top of the floating member 30, thereby realizing the connection between the diaphragm 40 and the floating member 30 through the protruding structure 42, and the connection stability is good.

[0045] In one embodiment, the diaphragm 40 is an elastomer, such as NBR rubber.

[0046] In one embodiment, the intake channel 501 is arranged in a cross shape, while the exhaust channel 503 is radially distributed from the center to the outer ring in the areas not covered by the intake channel 501 and the central channel 502. This staggered distribution does not affect the flow of gas through each channel. At the same time, this radial distribution of the exhaust channel 503 also facilitates the design of a gradual opening and closing exhaust valve. The inner diameter of the exhaust channel 503 and the number of channels are not limited in detail and can be designed as needed.

[0047] It should be noted that the terms "first" and "second" used in this application are for descriptive purposes only and do not indicate any order. They should not be construed as indicating or implying relative importance, and can be interpreted as names.

[0048] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are merely examples and do not limit the present invention. The advantages of the present invention have been fully and effectively realized. The functions and structural principles of the present invention have been shown and explained in the embodiments, and any modifications or variations may be made to the implementation of the present invention without departing from the stated principles.

Claims

1. A balanced, gradual-acting exhaust valve, comprising a valve body having a valve chamber, a valve cover connected to the top of the valve body, and a liquid inlet communicating with the valve chamber at the bottom of the valve body, characterized in that, The valve chamber is provided with a floating element, a diaphragm and a valve seat in sequence along the central axis. The floating element is close to and used to seal the liquid inlet. The top of the valve seat is fixedly connected to the valve body. The diaphragm is connected to the floating element through the center position. The outer periphery of the diaphragm is fixedly connected to the bottom of the valve seat by fasteners. The valve seat has an air inlet channel on its outer periphery that connects to the valve cavity. The valve seat has a central channel along its central axis that connects to the air inlet channel. The other end of the central channel extends toward the diaphragm and through the valve seat. The valve seat has an exhaust channel at the bottom opposite the diaphragm and within the inner ring of the fastener. The exhaust channel is staggered from both the central channel and the air inlet channel. The other end of the exhaust channel extends to the outside of the valve body for exhaust.

2. The balanced gradual-acting exhaust valve as described in claim 1, characterized in that, The diaphragm has an integrally formed protrusion at the central axis position, and the protrusion is fixedly embedded in the top of the floating component.

3. The balanced gradual exhaust valve as described in claim 1, characterized in that, The diaphragm is an elastomer.

4. The balanced gradual exhaust valve as described in claim 1, characterized in that, The air intake channel is arranged in a cross shape, and the exhaust channel is arranged radially from the center to the outer ring in the areas not covered by the air intake channel and the central channel.

5. The balanced gradual exhaust valve as described in claim 1, characterized in that, A pressure plate is provided between the diaphragm and the valve seat, directly opposite the fastener.

6. The balanced gradual exhaust valve as described in claim 5, characterized in that, The fastener is a fastening screw, which passes through the diaphragm and the pressure plate in sequence and is screwed into the valve seat.

7. The balanced gradual exhaust valve as described in claim 1, characterized in that, The fastener is a pressure plate, the pressure plate has an external thread, and the valve seat has an internal thread that mates with the external thread.

Images