Large bore exhaust valve

Abstract

The utility model relates to exhaust valve technical field, concretely provides a big aperture exhaust valve, including valve body, pressing subassembly and pressing cap, the inside of valve body is equipped with intermediate passage, and the upper end of valve body is equipped with step hole, and the lower end is equipped with exhaust hole, and the opposite both sides of valve body are equipped with air inlet and air outlet respectively, and the through hole is equipped between step hole and intermediate passage, air inlet, air outlet, exhaust hole all are linked with intermediate passage, the pressing cap is from step hole and is installed into valve body from top to bottom, and pressing subassembly is from exhaust hole and is installed into valve body inside from bottom to top and drives end to pass through through -hole and extends to step hole and is connected with pressing cap screw thread, the valve body in the utility model adopts simple integrated structure design, and pressing subassembly and pressing cap are connected through screw thread, and the installation and disassembly are simple, and are easily integrated into the existing system, the sealing ring of easy wear is convenient to replace, and the maintenance cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of exhaust valve technology, specifically to a large-diameter exhaust valve. Background Technology

[0002] Exhaust valves are key components used to release excess gas, maintain pressure balance, or achieve rapid pressure relief. They are widely used in gas pressure testing systems, sealed containers, and piping equipment. In these applications, the performance of the exhaust valve directly affects the system's response speed, testing accuracy, and safety.

[0003] During gas pressure testing, it is often necessary to quickly adjust the system pressure or release excess gas to simulate specific operating conditions or calibrate sensors. At the same time, in closed environments, such as laboratory reactors, industrial storage tanks, or pneumatic control systems, exhaust valves also need to support gas sampling or status detection, such as performing composition analysis and pressure monitoring, to ensure reliable system operation. However, conventional push-button exhaust valves on the market, in pursuit of structural compactness, typically have relatively narrow internal airflow channels. For example, a published Chinese patent, CN221237179U, discloses an exhaust valve including a valve body. One end of the valve body has a valve end thread, and the valve body has a push-button exhaust assembly inside. The drive end of the push-button exhaust assembly is connected to a push cap via a thread, and a ventilation gap is left between the two sides of the push cap and the inner side of the top of the valve body. The push-button exhaust assembly includes a pressure spring, a connecting rod, a mounting platform, a sealing ring, a stepped hole, and a central hole. The stepped holes are respectively opened at the top and bottom of the valve body, and the distance between the two bottom sides of the push cap is smaller than the inner diameter of the stepped hole. The central hole is opened on the inner wall of the valve body near the two stepped holes, and the connecting rod is placed vertically in the central hole. The disclosed patent exhausts gas through the ventilation gap between the valve cap and the inner top of the valve body. This exhaust method based on a narrow gap has inherent defects. When the gas flows through the small gap, the resistance is large, resulting in a low exhaust flow rate per unit time, which is difficult to meet the application requirements of large-flow exhaust. In addition, the narrow structural space also limits the effective arrangement and range of action of the sealing element. With long-term use, the sealing performance is prone to decline due to wear, resulting in media leakage. Utility Model Content

[0004] In view of the shortcomings of the prior art described above, the purpose of this utility model is to provide a large-diameter exhaust valve to solve the problems of low exhaust flow and poor sealing performance during the exhaust process of exhaust valves with narrow gaps in the prior art.

[0005] To achieve the above and other related objectives, this utility model provides a large-diameter exhaust valve, including a valve body, a pressing assembly, and a pressing cap; The valve body has a central channel inside, a stepped hole at the upper end and an exhaust hole at the lower end, and an air inlet and an air outlet at opposite ends of the valve body. A through hole is provided between the stepped hole and the central channel. The air inlet, air outlet and exhaust hole are all connected to the central channel. The pressing cap is inserted into the valve body from top to bottom through the stepped hole, and the pressing assembly is inserted into the valve body from bottom to top through the vent hole. The driving end passes through the through hole and extends into the stepped hole to be threadedly connected to the pressing cap. The intermediate channel is opened and closed by pressing the pressing assembly.

[0006] In one embodiment of the present invention, the pressing assembly includes a shaft, a base, a spring, and a sealing rubber ring. The base is integrally formed at the lower end of the shaft, the rubber ring is sleeved between the side end of the shaft and the upper end of the base, and the spring is installed between the stepped hole and the pressing cap and sleeved on the outer side of the upper end of the shaft.

[0007] In one embodiment of this utility model, the sealing rubber ring is a conical rubber ring that is narrow at the top and wide at the bottom, or a spherical rubber ring.

[0008] In one embodiment of the present invention, the shaft body is fitted with at least one first O-ring in the region of the through hole, the first O-ring being used to form a seal between the intermediate channel and the stepped hole.

[0009] In one embodiment of the present invention, a second O-ring is fitted to the side end of the base, and the second O-ring is used to seal the exhaust hole in the exhaust state.

[0010] In one embodiment of this utility model, the exhaust port and the air outlet are connected when no exhaust is being emitted.

[0011] In one embodiment of this utility model, the intermediate channel is configured as a stepped type.

[0012] As described above, the large-diameter exhaust valve of this utility model has the following beneficial effects: 1. This utility model adopts a large-diameter flow channel for rapid exhaust, which increases the airflow orifice diameter, enabling the medium to have a higher flow capacity per unit time. At the same time, the valve port can be quickly opened and closed instantly by pressing, effectively balancing the instantaneous action and the demand for large-flow exhaust. In addition, in a closed environment, gas sampling or status detection can be performed through partial exhaust, improving the system's monitoring capabilities and safety.

[0013] 2. This utility model achieves rapid airflow conversion between the three holes through the reasonable layout of the air inlet, outlet, and exhaust hole, as well as the stepped design of the middle channel. At the same time, the matching design of the three holes provides effective space for the reasonable installation of the sealing ring. This utility model adopts a conical or spherical sealing rubber ring, combined with the sealing structure of the first O-ring and the second O-ring, to ensure reliable sealing of the exhaust valve in the open and closed states, reduce gas leakage, and improve system safety and efficiency.

[0014] 3. The valve body of this utility model adopts a simple integrated structure design. The pressing component and the pressing cap are connected by threads, which makes installation and disassembly simple and easy to integrate into existing systems. The easily worn sealing ring is easy to replace, reducing maintenance costs. This utility model realizes rapid airflow conversion between the three holes through the reasonable layout of the air inlet, air outlet and exhaust hole, as well as the stepped design of the middle channel, to meet a variety of functional requirements. Compared with traditional exhaust valves, this structure has a simpler process, a shorter manufacturing cycle, supports flexible adjustment of module specifications and exhaust volume parameters as needed, and has good adaptability and scalability. Attached Figure Description

[0015] Figure 1 The diagram shown is a structural schematic of the large-diameter exhaust valve in its initial state as disclosed in this utility model.

[0016] Figure 2 The diagram shows the working state of the large-diameter exhaust valve disclosed in this utility model.

[0017] Figure 3 The diagram shows the initial state of the large-diameter exhaust valve in Example 1.

[0018] Figure 4 The diagram shows the structural schematic of the detection state of the large-diameter exhaust valve in Example 1.

[0019] Component designation explanation Valve body 1; intermediate channel 11; stepped hole 12; air inlet 13; air outlet 14; exhaust hole 15; through hole 16; pressing assembly 2; shaft 21; base 22; spring 23; sealing rubber ring 24; pressing cap 3; first O-ring 4; second O-ring 5; container 6; testing instrument 7. Detailed Implementation

[0020] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification.

[0021] Please see Figures 1 to 4It should be understood that the structures, proportions, sizes, etc., illustrated in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and are not intended to limit the scope of this invention. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of this invention, should still fall within the scope of the disclosed technical content. Furthermore, the terms "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity and not intended to limit the scope of this invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of this invention.

[0022] Please see Figures 1-2 This utility model provides a large-diameter exhaust valve, including a valve body 1, a pressing assembly 2, and a pressing cap 3. The valve body 1 has an internal intermediate channel 11, which is stepped. The valve body 1 has a stepped hole 12 at the upper end and an exhaust hole 15 at the lower end. The valve body 1 has an air inlet 13 and an air outlet 14 at opposite ends. A through hole 16 is provided between the stepped hole 12 and the intermediate channel 11. The air inlet 13, the air outlet 14, and the exhaust hole 15 are all connected to the intermediate channel 11. The exhaust hole 15 and the air outlet 14 are connected when no exhaust is being released. The pressing cap 3 is inserted into the valve body 1 from top to bottom through the stepped hole 12. The pressing assembly 2 is inserted into the valve body 1 from bottom to top through the exhaust hole 15, and its driving end passes through the through hole 16 and extends into the stepped hole 12 to be threadedly connected to the pressing cap 3. The intermediate channel 11 is opened and closed by pressing the pressing assembly 2. This invention optimizes the fit between the intermediate channel 11 and the exhaust port, employing a large-diameter flow channel for rapid exhaust. This increases the airflow orifice diameter, resulting in higher medium flow capacity per unit time. Simultaneously, the valve port can be rapidly opened and closed with a single press, effectively balancing instantaneous action with the demand for high-flow exhaust. It is suitable for high-pressure or high-speed airflow environments. Furthermore, in confined environments, partial exhaust can be used for gas sampling or status detection, enhancing system monitoring capabilities and safety.

[0023] The pressing assembly 2 includes a shaft 21, a base 22, a spring 23, and a sealing rubber ring 24. The base 22 is integrally formed at the lower end of the shaft 21. The rubber ring 24 is sleeved between the side end of the shaft 21 and the upper end of the base 22. The spring 23 is installed between the stepped hole 12 and the pressing cap 3 and is sleeved on the outer side of the upper end of the shaft 21. The sealing rubber ring 24 is a tapered rubber ring that is narrower at the top and wider at the bottom, or a spherical rubber ring. At least one first O-ring 4 is fitted in the area of ​​the through hole 16 on the shaft 21. The first O-ring 4 is used to form a seal between the intermediate channel 11 and the stepped hole 12. A second O-ring 5 is fitted on the side end of the base 22. The second O-ring 5 is used to seal the vent hole 15 in the venting state. This invention achieves rapid airflow conversion between the three ports through the rational layout of the air inlet 13, air outlet 14, and exhaust port 15, as well as the stepped design of the intermediate channel 11. This solution controls the exhaust flow rate by adjusting the pressing pressure, meeting various exhaust function requirements, such as multi-channel exhaust, gas distribution, or staged pressure relief. Simultaneously, the coordinated design of the three ports provides effective space for the proper installation of the sealing ring. This invention uses a conical or spherical sealing rubber ring 24, combined with the sealing structure of the first O-ring 4 and the second O-ring 5, ensuring reliable sealing of the exhaust valve in both open and closed states, reducing gas leakage, and improving system safety and efficiency. This solution also features an automatic pressure relief function; in actual use, the pressure relief can be adjusted by changing the spring 23's pressure and the number of threads tightened on the pressing cap 3.

[0024] Please see Figures 3-4 Example 1: This example provides a large-diameter exhaust valve for gas detection applications. It uses a container 6 with a gas chamber and a detection instrument 7. The detection end of the detection instrument 7 is connected to the upper end of the container 6. The exhaust valve's outlet 14 is connected to the gas chamber of the container 6 through a pipe. In the initial state, the spring 23 resists compression and presses against the pressing cap 3, transmitting an upward force to the shaft 21. This causes the conical sealing rubber ring 24 on the shaft 21 to block the middle channel 11 and form a limit, cutting off the connection between the inlet 13 and the outlet 14. At this time, the outlet 14 is connected to the exhaust port 15 and the outside. During the testing process, external force presses down the cap 3 and limits its movement, compressing the spring 23 and transmitting a downward force to the shaft 21. This causes the conical sealing rubber ring 24 on the shaft 21 to move down, opening the intermediate channel 11. Simultaneously, the second O-ring 5 at the lower end of the shaft 21 blocks the exhaust port 15. At this time, the internal air inlet 13 and air outlet 14 are connected, while the exhaust port 15 is not connected. The gas to be tested enters the air outlet 14 from the air inlet 13 through the intermediate channel 11, and then enters the gas chamber of the container 6. After the gas chamber is filled with gas, the gas contacts the testing instrument 7 and transmits the corresponding information. After the test is completed, the external force is removed, the spring 23 rebounds, the air inlet 13 closes, and the gas in the gas chamber enters the exhaust port 15 from the air outlet 14 and is discharged, returning to the initial state. For ease of demonstration, the container 6 in the attached diagram is set to be very large, but in this embodiment, the air chamber is actually very small, about the size of a single channel, which can ensure that it is filled with gas at the moment the pressing component 2 is operated, so as to ensure that the air pressure inside the air chamber is equal to the air pressure at the air inlet 13 at the moment.

[0025] In summary, the valve body of this utility model adopts a simple integrated structural design. The pressing component 2 and the pressing cap 3 are connected by threads, making installation and disassembly simple and easy to integrate into existing systems. The easily worn sealing ring is easy to replace, reducing maintenance costs. This utility model achieves rapid airflow conversion between the three holes through the reasonable layout of the air inlet 13, air outlet 14, and exhaust port 15, as well as the stepped design of the intermediate channel 11, meeting multiple functional requirements. Compared with traditional exhaust valves, this structure has a simpler process, shorter manufacturing cycle, and supports flexible adjustment of module specifications and exhaust volume parameters as needed, possessing good adaptability and scalability. Therefore, this utility model effectively overcomes the various shortcomings of the prior art and has high industrial application value.

[0026] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A large-diameter exhaust valve, comprising a valve body (1), a pressing assembly (2), and a pressing cap (3); Its features are: The valve body (1) has an internal intermediate channel (11), a stepped hole (12) at the upper end and an exhaust hole (15) at the lower end, an air inlet (13) and an air outlet (14) at opposite ends of the valve body (1), and a through hole (16) between the stepped hole (12) and the intermediate channel (11); the air inlet (13), the air outlet (14) and the exhaust hole (15) are all connected to the intermediate channel (11); The pressing cap (3) is inserted into the valve body (1) from top to bottom through the stepped hole (12), and the pressing assembly (2) is inserted into the valve body (1) from bottom to top through the vent hole (15), with the drive end passing through the through hole (16) and extending into the stepped hole (12) to be threadedly connected to the pressing cap (3). The intermediate channel (11) is opened and closed by pressing the pressing assembly (2).

2. The large-diameter exhaust valve according to claim 1, characterized in that: The pressing assembly (2) includes a shaft (21), a base (22), a spring (23), and a sealing rubber ring (24). The base (22) is integrally formed at the lower end of the shaft (21). The rubber ring (24) is sleeved between the side end of the shaft (21) and the upper end of the base (22). The spring (23) is installed between the stepped hole (12) and the pressing cap (3) and sleeved on the outer side of the upper end of the shaft (21).

3. The large-diameter exhaust valve according to claim 2, characterized in that: The sealing rubber ring (24) is a conical rubber ring that is narrow at the top and wide at the bottom, or a spherical rubber ring.

4. The large-diameter exhaust valve according to claim 2, characterized in that: The shaft (21) is fitted with at least one first O-ring (4) in the area of ​​the through hole (16), the first O-ring (4) being used to form a seal between the intermediate channel (11) and the stepped hole (12).

5. The large-diameter exhaust valve according to claim 2, characterized in that: The base (22) is fitted with a second O-ring (5) on its side end. The second O-ring (5) is used to seal the exhaust hole (15) in the exhaust state.

6. The large-diameter exhaust valve according to claim 1, characterized in that: The exhaust port (15) and the air outlet (14) are connected when no exhaust is being emitted.

7. The large-diameter exhaust valve according to claim 1, characterized in that: The intermediate channel (11) is set in a stepped shape.

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