A pressure relief valve

Abstract

The utility model provides a kind of pressure relief valve, including valve body and valve core, first chamber and second chamber are equipped in valve body, valve body is additionally equipped with air inlet hole and air outlet hole, air inlet hole is communicated with second chamber, air outlet hole is communicated with first chamber;First chamber and second chamber are communicated by connecting hole;Valve core includes first end, second end and connecting portion, first end is connected second end by connecting portion;First end is located in second chamber, first end corresponds with air inlet hole, and this first end is used to abut valve body inner wall;Second end extends to first chamber by connecting hole;First chamber is provided with spring, and the spring abuts second end of valve core;The circumferential surface of the connecting portion of valve core is provided with several exhaust grooves, and the cross-sectional area of the exhaust grooves gradually increases from the second end to the first end.Collaborate air pressure and valve core moving distance and the dynamic change of exhaust groove cross-sectional area, automatically adjust the size of pressure relief channel, realize the dynamic matching of pressure relief amount and air pressure.

Description

Technical Field

[0001] This utility model relates to a pressure relief device, specifically a pressure relief valve. Background Technology

[0002] Pressure relief valves can automatically open and close according to the system's working pressure. They are generally installed on equipment or pipelines in closed systems to protect system safety. When the pressure inside the equipment or pipeline exceeds the pressure set by the pressure relief valve, it will automatically open to release pressure, ensuring that the pressure of the medium inside the equipment and pipeline is below the set pressure, thus protecting the equipment and pipeline and preventing accidents.

[0003] Currently, pressure relief valves are widely used in automobile engines, but existing engine pressure relief valves have poor pressure relief effects. Therefore, this invention proposes an engine pressure relief valve with good pressure relief effect. Utility Model Content

[0004] The purpose of this utility model is to provide a pressure relief valve, and the technical problem to be solved is how to improve the pressure relief effect of the pressure relief valve.

[0005] This utility model is achieved through the following technical solution: A pressure relief valve includes a valve body and a valve core. The valve body is provided with a first chamber and a second chamber. The valve body is also provided with an air inlet and an air outlet. The air inlet communicates with the second chamber, and the air outlet communicates with the first chamber. The first chamber and the second chamber are connected by a connecting hole. The valve core includes a first end, a second end, and a connecting portion. The first end is connected to the second end via the connecting portion. The first end is located in the second chamber and corresponds to the air inlet. The first end is used to abut against the inner wall of the valve body. The aforementioned second end extends through the connecting hole into the first chamber; The first chamber is equipped with a spring, which abuts against the second end of the valve core; The connecting part of the valve core is provided with several exhaust grooves on its circumferential surface, and the cross-sectional area of ​​the exhaust grooves gradually increases from the second end to the first end.

[0006] During the depressurization process, the greater the air pressure, the greater the distance the connecting part moves towards the first chamber, enabling the depressurization valve to automatically adjust the valve core position according to the actual air pressure, thus achieving adaptive adjustment for different air pressure conditions. Since the connecting part of the valve core has several exhaust grooves on its circumference, and the cross-sectional area of ​​the exhaust grooves gradually increases from the second end to the first end, as the air pressure increases, the connecting part moves further towards the first chamber, and the cross-sectional area of ​​the exhaust grooves gradually increases. This means that when the air pressure is high and rapid depressurization is required, the effective area of ​​the exhaust channel increases, thereby increasing the depressurization amount per unit time. As depressurization continues, the air pressure in the pipeline gradually decreases, the connecting part moves towards the second chamber, and the cross-sectional area of ​​the exhaust grooves gradually decreases. This means that when the air pressure is low, the effective area of ​​the exhaust channel decreases, and the depressurization becomes slower.

[0007] By coordinating the relationship between air pressure and valve core movement distance, as well as the dynamic change of exhaust groove cross-sectional area, the pressure relief valve automatically adjusts the size of the pressure relief channel according to actual needs under different air pressure conditions, thus achieving dynamic matching between pressure relief and air pressure.

[0008] Furthermore, the aforementioned connecting part slides within the connecting hole.

[0009] During sliding, the aforementioned connecting part remains in contact with the connecting hole, thus resolving the issue of valve core vibration.

[0010] Furthermore, the contact surfaces of the aforementioned connecting parts and connecting holes are smooth.

[0011] During the pressure relief process, the air pressure pushes the valve core to move, thereby changing the pressure relief area of ​​the exhaust groove. The smooth contact surfaces of the connecting part and the connecting hole reduce the friction between them, allowing the valve core to react promptly when the air pressure changes and quickly adjust to the appropriate pressure relief position. It will not cause slow movement or jamming due to excessive friction, thus ensuring the rapid response of the pressure relief valve to changes in air pressure and helping to improve the overall pressure relief effect.

[0012] Furthermore, the first end portion near the connecting portion has a first arc surface on its edge. The first end portion and the connecting portion are transitioned by the arc surface.

[0013] Furthermore, the edge of the first end away from the connecting part is provided with a second arc surface.

[0014] The first arc surface alters the flow path of the gas in the area where the first end meets the connecting part, and the second arc surface alters the flow path of the gas when it first enters the second chamber. When the gas enters the second chamber from the inlet and impacts the valve core, the sudden turn of the edge will cause airflow turbulence and energy loss. The first arc surface can smoothly guide the gas flow, allowing the gas to transition naturally along the arc surface, reducing the sharp turn and collision of the airflow, reducing the local resistance in the gas flow process, helping the gas to pass smoothly through the area around the valve core, accelerating the gas to reach the exhaust groove, and increasing the pressure relief speed.

[0015] Furthermore, the aforementioned exhaust grooves are evenly distributed around the periphery of the connecting part with the connecting part axis as the central axis.

[0016] When gas is released through the exhaust channels, the evenly distributed exhaust channels ensure that the gas flows out uniformly across the circumference of the connection. The even distribution of gas across each exhaust channel ensures a balanced airflow throughout the entire pressure relief channel, helping to avoid excessively fast or slow local airflow velocities. This reduces energy loss and pressure fluctuations caused by uneven airflow, thereby improving the stability and efficiency of the pressure relief process. During pressure relief, the gas exerts a force on the valve core. If the exhaust channels are unevenly distributed, the gas force on the valve core will also be unevenly distributed, causing the valve core to be subjected to eccentric torque, which can easily lead to unstable movement phenomena such as wobbling and jamming. The evenly distributed exhaust channels ensure that the gas force is evenly distributed around the valve core, reducing the force deviation on the valve core and ensuring the stability of the valve core during movement. This not only improves the reliability of the valve core's movement but also extends its service life and reduces the risk of pressure relief valve failure due to valve core malfunction.

[0017] Furthermore, the aforementioned exhaust groove is arc-shaped.

[0018] By reducing airflow turbulence and energy loss caused by sharp edges, the gas flow is smoothly guided by an arc, allowing the gas to transition naturally along the arc surface. This reduces abrupt changes and collisions in the airflow and lowers local resistance during the gas flow process.

[0019] Furthermore, a spring seat is fitted onto the second end, and the spring seat has a protrusion that is fitted inside the spring.

[0020] The aforementioned spring is fitted onto the spring seat protrusion to prevent the spring from falling off; if the spring pressure is not applied to the valve core, the valve core and the inner wall of the valve body will lose their clamping force, resulting in no contact and no corresponding pressure relief operation.

[0021] Compared with the prior art, this utility model has the following advantages and beneficial effects: During the depressurization process, the greater the air pressure, the greater the distance the connecting part moves towards the first chamber, enabling the depressurization valve to automatically adjust the valve core position according to the actual air pressure, thus achieving adaptive adjustment for different air pressure conditions. Since the connecting part of the valve core has several exhaust grooves on its circumference, and the cross-sectional area of ​​the exhaust grooves gradually increases from the second end to the first end, as the air pressure increases, the connecting part moves further towards the first chamber, and the cross-sectional area of ​​the exhaust grooves gradually increases. This means that when the air pressure is high and rapid depressurization is required, the effective area of ​​the exhaust channel increases, thereby increasing the depressurization amount per unit time. As depressurization continues, the air pressure in the pipeline gradually decreases, the connecting part moves towards the second chamber, and the cross-sectional area of ​​the exhaust grooves gradually decreases. This means that when the air pressure is low, the effective area of ​​the exhaust channel decreases, and the depressurization becomes slower.

[0022] By coordinating the relationship between air pressure and valve core movement distance, as well as the dynamic change of exhaust groove cross-sectional area, the pressure relief valve automatically adjusts the size of the pressure relief channel according to actual needs under different air pressure conditions, thus achieving dynamic matching between pressure relief and air pressure. Attached Figure Description To more clearly illustrate the technical solutions of the exemplary embodiments of this utility model, the drawings used in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of this utility model and should not be considered as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort. In the drawings: Figure 1 This is a schematic diagram of the planar structure of the pressure relief valve; Figure 2 for Figure 1 A magnified view of part A in the image; Figure 3 This is a schematic diagram of the structure of the first end and the connecting part in the valve core; Figure 4 This is a schematic diagram of the overall structure of the valve core; Figure 5 This is a planar schematic diagram of the valve core; Figure 6 This is a cross-sectional schematic diagram of the connection part; Figure 7 A schematic diagram of the cross-section of the connecting part fitted behind the connecting hole.

[0023] The attached diagram shows the markings and corresponding component names: 1. Valve body; 11. First chamber; 12. Second chamber; 13. Air inlet; 14. Air outlet; 2. Spring; 3. Valve core; 31. First end; 32. Connecting part; 33. Second end; 34. Exhaust groove; 35. Spring seat; 36. Screw; 37. First arc surface; 38. Second arc surface. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the embodiments and accompanying drawings. The illustrative embodiments and descriptions of this utility model are only used to explain this utility model and are not intended to limit this utility model.

[0025] First embodiment: Combination Figures 1 to 4 A pressure relief valve includes a valve body 1 and a valve core 3. The valve body 1 is provided with a first chamber 11 and a second chamber 12. The valve body 1 is also provided with an air inlet 13 and an air outlet 14. The air inlet 13 is connected to the second chamber 12, and the air outlet 14 is connected to the first chamber 11. The first chamber 11 and the second chamber 12 are connected to each other through a connecting hole. The valve core 3 includes a first end 31, a second end 33 and a connecting part 32. The first end 31 is connected to the second end 33 through the connecting part 32. The first end 31 is located in the second chamber 12 and corresponds to the air inlet 13. The first end 31 is used to abut against the inner wall of the valve body 1. The aforementioned second end 33 extends through the connecting hole into the first chamber 11; The first chamber 11 is provided with a spring 2, which abuts against the second end 33 of the valve core 3; The connecting portion 32 of the valve core 3 is provided with a plurality of exhaust grooves 34 on its circumferential surface, and the cross-sectional area of ​​the exhaust grooves 34 gradually increases from the second end 33 to the first end 31.

[0026] During the depressurization process, the greater the air pressure, the greater the distance that the connecting part 32 moves towards the first chamber 11, enabling the depressurization valve to automatically adjust the position of the valve core 3 according to the actual air pressure, thus achieving adaptive adjustment for different air pressure conditions. Since the connecting part 32 of the valve core 3 is provided with several exhaust grooves 34 on its circumference, and the cross-sectional area of ​​the exhaust grooves 34 gradually increases from the second end 33 to the first end 31, as the air pressure increases, the connecting part 32 moves further towards the first chamber 11, and the cross-sectional area of ​​the exhaust grooves 34 gradually increases. This means that when the air pressure is high and rapid depressurization is required, the effective area of ​​the exhaust channel increases, thereby increasing the depressurization amount per unit time. As depressurization continues, the air pressure in the pipeline gradually decreases, the connecting part 32 moves towards the second chamber 12, and the cross-sectional area of ​​the exhaust grooves 34 gradually decreases. This means that when the air pressure is low, the effective area of ​​the exhaust channel decreases, and the depressurization becomes slower.

[0027] By coordinating the relationship between air pressure and the moving distance of valve core 3, as well as the dynamic change of the cross-sectional area of ​​exhaust groove 34, the pressure relief valve can automatically adjust the size of the pressure relief channel according to actual needs under different air pressure conditions, thereby achieving dynamic matching between pressure relief and air pressure.

[0028] In a specific embodiment, the connecting part 32 slides within the connecting hole.

[0029] During sliding, the connecting part 32 is always in contact with the connecting hole, thus solving the problem of valve core 3 shaking.

[0030] In a specific embodiment, the contact surfaces of the connecting portion 32 and the connecting hole are smooth.

[0031] During the pressure relief process, the air pressure pushes the valve core 3 to move, thereby changing the pressure relief area of ​​the exhaust groove 34. The contact surface between the connecting part 32 and the connecting hole is smooth, which can reduce the friction between the two. When the air pressure changes, the valve core 3 can react in time and quickly adjust to the appropriate pressure relief position. It will not cause slow movement or jamming due to excessive friction, thus ensuring the rapid response of the pressure relief valve to changes in air pressure and helping to improve the overall pressure relief effect.

[0032] Second embodiment: Based on the first embodiment, the first end 31 is provided with a first arc surface 37 on one side near the connecting part 32, combined with... Figure 5 The first end portion 31 and the connecting portion 32 are transitioned by an arc surface.

[0033] In a specific embodiment, the edge of the first end 31 away from the connecting portion 32 is provided with a second arc surface 38, combined with... Figure 5 .

[0034] The first arc surface 37 changes the flow path of the gas in the area where the first end 31 and the connecting part 32 meet, and the second arc surface 38 changes the flow path of the gas when it first enters the second chamber 12. When the gas enters the second chamber 12 from the air inlet 13 and impacts the valve core 3, the sudden turning of the edge will cause airflow turbulence and energy loss. The first arc surface 37 can smoothly guide the gas flow, allowing the gas to transition naturally along the arc surface, reducing the sharp turning and collision of the airflow, reducing the local resistance in the gas flow process, helping the gas to pass smoothly through the area around the valve core 3, accelerating the gas to reach the exhaust groove 34, and increasing the pressure relief speed.

[0035] Third embodiment: Based on any of the above embodiments, the exhaust grooves 34 are evenly distributed around the circumference of the connecting part 32 with the axis of the connecting part 32 as the central axis, combined with Figure 6 and Figure 7 .

[0036] When gas is released through the exhaust channels 34, the evenly distributed exhaust channels 34 ensure that the gas flows out uniformly around the circumference of the connection 32. The gas is evenly distributed among the exhaust channels 34, resulting in a balanced airflow distribution throughout the entire pressure relief channel. This helps avoid excessively fast or slow local airflow velocities, reducing energy loss and pressure fluctuations caused by uneven airflow, thereby improving the stability and efficiency of the pressure relief process. During the pressure relief process, the gas exerts a force on the valve core 3. If the exhaust channels 34 are not evenly distributed, the gas force on the valve core 3 will also be unevenly distributed, causing the valve core 3 to be subjected to an eccentric torque, which can easily lead to unstable movement phenomena such as swaying and jamming. The evenly distributed exhaust channels 34 ensure that the gas force is evenly distributed around the valve core 3, reducing the force deviation on the valve core 3, ensuring the stability of the valve core 3 during movement, improving the reliability of the valve core 3's movement, extending its service life, and reducing the risk of pressure relief valve failure due to valve core 3 malfunction.

[0037] In a specific embodiment, the exhaust groove 34 is arc-shaped, combined with Figure 6 and Figure 7 .

[0038] By reducing airflow turbulence and energy loss caused by sharp edges, the gas flow is smoothly guided by an arc, allowing the gas to transition naturally along the arc surface. This reduces abrupt changes and collisions in the airflow and lowers local resistance during the gas flow process.

[0039] Fourth embodiment: Based on any of the above embodiments, the second end 33 is fitted with a spring seat 35, combined with Figure 1 and Figure 5 The aforementioned spring seat 35 is connected to the second end 33 via a screw 36; the aforementioned spring seat 35 is provided with a protrusion (not shown in the figure), which is sleeved inside the spring 2.

[0040] The aforementioned spring 2 is sleeved on the protrusion of the spring seat 35 to prevent the spring 2 from falling off; if the pressure of the spring 2 is not applied to the valve core 3, the valve core 3 and the inner wall of the valve body 1 will lose the clamping force, resulting in the inability to abut and the inability to achieve the corresponding pressure relief operation.

[0041] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above description is only a specific embodiment of this utility model and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A pressure relief valve, characterized in that, The valve includes a valve body (1) and a valve core (3). The valve body (1) is provided with a first chamber (11) and a second chamber (12). The valve body (1) is also provided with an air inlet (13) and an air outlet (14). The air inlet (13) is connected to the second chamber (12), and the air outlet (14) is connected to the first chamber (11). The first chamber (11) and the second chamber (12) are connected by a connecting hole. The valve core (3) includes a first end (31), a second end (33) and a connecting part (32). The first end (31) is connected to the second end (33) through the connecting part (32). The first end (31) is located in the second chamber (12) and corresponds to the air inlet (13). The first end (31) is used to abut against the inner wall of the valve body (1). The second end (33) extends through the connecting hole into the first chamber (11); The first chamber (11) is provided with a spring (2), which abuts against the second end (33) of the valve core (3); The valve core (3) has a plurality of exhaust grooves (34) on its peripheral surface at the connecting part (32), and the cross-sectional area of ​​the exhaust grooves (34) gradually increases from the second end (33) to the first end (31).

2. The pressure relief valve according to claim 1, characterized in that, The connecting part (32) slides within the connecting hole.

3. The pressure relief valve according to claim 2, characterized in that, The contact surfaces of the connecting part (32) and the connecting hole are smooth.

4. The pressure relief valve according to claim 1, characterized in that, The first end (31) has a first arc surface (37) on one side edge near the connecting part (32).

5. The pressure relief valve according to claim 1, characterized in that, The first end (31) has a second arc surface (38) on one side away from the connecting part (32).

6. The pressure relief valve according to claim 1, characterized in that, The exhaust grooves (34) are evenly distributed around the circumference of the connecting part (32) with the axis of the connecting part (32) as the central axis.

7. The pressure relief valve according to claim 1, characterized in that, The exhaust groove (34) is arc-shaped.

8. The pressure relief valve according to claim 1, characterized in that, The second end (33) is fitted with a spring seat (35), which has a protrusion that is fitted inside the spring (2).

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